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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_138_библиотеки_им_акад_М_И_Перельмана

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malalignment of the cervical spine, interfering with the tonic
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neck reex, can also aect the vestibular nuclei.
16
Swallowing and speech diculty
Swallowing and speech diculty in patients with TMD is due to the trigeminocervical nucleus connection of cranial nerves V, VII, IX, X, XI. e input of the TMJ through the cranial nerve V will aect other cranial nerve distribution to the tongue and pharynx area.
Psychological aect
Anxiety, depression, or chronic pain is often associated with TMD. Patients tend to clench their jaws under stressful situations, which triggers the vicious cycle of spasm and pain. e psychological issue can be a biproduct of TMD or can be a precipitating and perpetuating factor of the TMD. is area will be discussed further in the management section.
Trigeminal neuralgia (tic douloureux)
Trigeminal neuralgia is a paroxysmal, unilateral, elec­tric-like, stabbing pain that occurs intermittently and abates within seconds or minutes. is is a neurogenic type of pain that involves the maxillary and mandibular divisions of the tri­geminal nerve. Temporomandibular joint pain and other orofa­cial pain may mimic the symptoms of trigeminal neuralgia. A complete and conclusive diagnosis can be done by a neurolo­gist, who also guides the proper management procedures.
Temporal arteritis
Temporal arteritis is a condition caused by subacute in­ammation of the supercial temporal artery and the vertebral artery. Its clinical presentation includes severe unilateral or bilateral headache over the scalp-temporal artery region. Jaw claudication with pain or stiness during chewing is highly suggestive of this condition due to ischemia of the muscles of mastication. Ophthalmologic evaluation is vital because of the danger of vision loss associated with this condition.
Atypical odontalgia (phantom tooth pain)
Atypical odontalgia or phantom tooth pain is a constant, burning or pressure-like pain, that occurs after endodontic pro­cedures and dental extraction. is condition is caused by the disruption of neural pathways to the alveolar or pulp.
Post-herpetic neuralgia (herpes zoster)
Post-herpetic neuralgia or herpes zoster is a constant, se­vere, burning, or stabbing pain over the distribution of the rst division of the trigeminal nerve. is condition is associated with shingles (herpes zoster), a reactivation of the varicella-zos­ter virus in individuals with a history of varicella infection. Pain associated with this condition may be severe and disproportion­ate to the extent of skin irritation.
Ménière disease
Ménière disease is dened as a combination of vertigo, tin-
86,87
nitus, aural fullness, and facial-TMJ pain. Bjorne et al
re­ported that a coordinated treatment of TMD and cervical spine disorder was eective in relieving symptoms of Ménière disease, even after a 3-year follow- up.
Cervical or postural cause
e pattern of referred pain to the facial or TMJ area from a cervical origin, and vice versa, has been acknowledged both clinically and scientically. Many studies have reported that pa­tients with TMD often report neck symptoms, and patients with cervical spine-related symptoms often complain of TMD.
29,79,88
Neck pain is the rst comorbidity of TMD followed by head-
89,90
ache, low back pain, and joint pain.
von Piekartz et al91 performed a cross-sectional study and concluded that TMD is strongly related to cervical spine musculoskeletal impairments; therefore, treatment of the cervical spine is recommended for
92
the management of TMD. Hong et al
conducted a study to investigate the relationship among cervical spine degeneration, head and neck postures, and myofascial pain in older individ­uals with TMD. ey concluded that in this particular popu­lation, degenerative changes in the cervical spine were related to altered head posture and the development of active trigger points in the masticatory and cervical muscles.
A forward head posture typically causes the mouth to open
93
wider, which in turn may result in TMJ hypermobility.
e increased tightness of the suboccipital muscles resulting from the forward head posture would exert undesirable pressure on the greater occipital nerve, which in turn may cause symptoms radiating into the head, face, ear, neck, and even scapular ar-
31,32,40,44
eas.
e relationship between head posture and dental occlu­sion has also been documented. When the head is side bent and rotated away, the occlusal contact is stronger on the ip­silateral side. When the head extends, the occlusal contact is more posterior; while when the head exes, the occlusal contact
31
becomes more anterior.
erefore, when assessing a patient’s TMJ symptoms, the physical therapist must make sure the pa­tient stays in a neutral head position. e same guideline applies to the dentist for occlusal adjustment.
Patients also brux more in response to neck pain. is be-
havior increases the tension of the masticatory musculature and
94
can trigger joint and myofascial symptoms. Clark et al
used electromyography (EMG) on 12 males to study the connection between masseter muscle contraction and the activation of the SCM. ey reported that there was a progressive development of SCM coactivation that paralleled masseter muscle activation.
45
De Laat et al
studied the correlation between the cervical spine and TMD for 30 patients with TMD and 30 control partic­ipants. ey reported that segmental limitations (especially at the Occiput-C3 levels) and tender points (especially in the SCM and upper trapezius muscles) were signicantly more
Academy of Orthopaedic Physical erapy, APTA. For personal use only. No other uses without permission. © 2021 Academy of Orthopaedic Physical erapy, APTA, Inc. All rights reserved.
27
present in those with TMD. In contrast, Visscher et al95 did not
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nd a signicant dierence in head posture between individuals with and without TMD. erefore, they did not support the theory that TMD is related to head posture.
2
Armijo Olivo et al
and Olivo et al96 conducted systematic reviews to assess the association between head and cervical pos­ture and TMD. Neither review was able to make conclusions due to the poor methodological quality of most research. ey recommended that future studies should include a larger sample size, better classication in TMD diagnoses, and more objective methods for posture evaluation.
97
La Touche et al
applied manual mobilization to the cer­vical spine and provided deep cervical exor muscle exercises to 19 patients with myofascial TMD for a total of 10 treatment sessions over a 5-week period. ey concluded that the appli­cation of these treatments targeted at the cervical spine were benecial in decreasing pain intensity, increasing pressure pain threshold (PPT) over the masticatory muscles, and increasing pain-free mouth opening in patients with myofascial TMD.
98
La Touche et al
further studied the inuence of 3 dier­ent cranio-cervical postures, neutral, forward, and retracted, on maximal mouth opening and PPT in patients with myofascial temporomandibular pain disorders. ey concluded that there was a biomechanical relationship and interaction within the trigeminocervical complex as well as nociceptive processing in dierent cranio-cervical postures.
Chronic pain, psychosocial factors, stress factors
Myogenous TMD is signicantly aected by the level of stress experienced by the patient on a daily basis. Studies have shown that patients with TMD demonstrate increased somati­zation, stress, anxiety, and depression compared to healthy indi-
99
viduals.
If these psychological factors are not addressed in the
early phase of the condition, chronic pain will develop and can
100
perpetuate and maintain the TMD.
Physical therapists play an important role in recognizing predisposing factors for chron­ic pain (eg, fear avoidance, symptom catastrophizing, etc) so that proper overall management of the patient can be designed to avoid the development of chronic pain. Timely referral to psychotherapy or behavioral therapy should be made as needed.
PHYSICAL THERAPY MANAGEMENT FOR TEMPOROMANDIBULAR JOINT DISORDERS
Non-surgical treatment is now recommended as the rst option for managing TMDs. Options include physical therapy as well as medication, occlusal adjustment, splint therapy, chi­ropractic care, osteopathic care, and cognitive behavioral ther­apy, provided in isolation or in combination. Physical therapy intervention plays an important role in assisting patients with TMD to control symptoms, restore normal kinematics, and op­timize oral function.
Patient Education
e rst step of physical therapy management is to explain to the patient the etiology, epidemiology, natural course of the disorder, prognosis, treatment goals, and predicted outcome of treatment. Research has shown that when patients have a good understanding about their condition, the treatment outcomes are more favorable.
30
Physical therapists play a vital role in pre­venting patients from developing a chronic condition. Preven­tion is accomplished in part by using appropriate pain neurosci­ence education (PNE) to decrease fear and anxiety.
Sleep hygiene is another important area that needs to be included in patient education. Sleeping posture, relaxation, comfortable environment, dim light, removal of electronic de­vices, and avoidance of large meals, caeine, and alcohol before bedtime are some of the instructions that can be helpful for a more restful sleep. Nocturnal bruxism has been proven to be related to TMD.
101
erefore, stress management and the use of
a night splint (if indicated) is recommended.
Relaxation, Postural Correction, and Body Mechanics Instruction
Relaxation training is critical to reduce muscle hyperactiv­ity; in essence, teaching patients to decrease their cervical and mandibular muscle activity to the “least measurable activity” at rest. is is accomplished by performing diaphragmatic breath­ing, imagery, and progressive relaxation exercises. Ferendiuk et
102
al
recommended using Jacobson’s progressive relaxation tech-
nique as a supportive therapy for patients with TMD.
Proper alignment of the head, neck, and spine is of utmost importance in the management of TMD. Komiyama et al and Wright et al
104
studied the eectiveness of postural correc-
103
tion for patients with myofascial TMD and concluded that pos­tural training was benecial in relieving symptoms, increasing mouth opening, and decreasing disruption of ADLs.
Body mechanics principles for working, computer use, sit­ting, standing, transferring, lifting, driving, and sports activities should be reviewed with the patient. Sleeping posture should be analyzed as well. Prone sleep positions that put extra pressure on the jaw and excessive stretching of the cervical musculature should be avoided. Proper sleeping posture appears to have a positive eect on nocturnal parafunctions.
30
Physical therapists also have the ability to recommend the appropriate type of pil­low for each patient.
Oral Habits Modication
Proper tongue resting position is necessary for a relaxed jaw. e patient is instructed to gently keep the tip of the tongue on the palate, resting slightly posterior to the maxillary central in­cisors; keep the back molars apart, lips together, while breathing normally; and maintain the jaw and surrounding muscles in a relaxed manner at all times. When a patient has diculty keep­ing the tongue on the palate, the general relaxation techniques mentioned in the previous section are reinforced. e patient is
28
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For personal use only. No other uses without permission.
then instructed to just relax the tongue and make sure the back
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molars are apart while lips are kept together. For a patient with a hypermobile TMJ, keeping the tongue on the palate while yawning is advisable to prevent subluxation or dislocation of the jaw. Patients should avoid any undesirable oral habits (eg, clenching, biting on cheek or pen, biting on nails, sucking on lips, supporting or resting the jaw or head on hand(s), playing with jaw and mouth, etc). Overcoming parafunctional oral hab­its will provide the TMJ and its related structures with a more balanced environment.
permeability. Sei et al
112
and Rezazadeh et al
113
conducted studies to compare the eectiveness of TENS and LLL. Both groups reported that TENS, as well as LLL, were eective in relieving pain and muscle tenderness in patients with TMD,
113
with Rezazadeh et al than LLL. Chellappa et al
nding that TENS was more eective
114
also studied the ecacy of LLL and TENS for the relief of TMD symptoms using a RCT. ey reported that both methods produced substantial improvement in ROM and pain relief, with the LLL group exhibiting statis­tically signicant better improvement than the TENS group.
114
Soft Diet
For acute or postoperative conditions, a complete soft or semi-solid diet is recommended until the patient’s pain symp­toms subside. Some suggestions include soup, pasta, mashed potatoes, sh, chicken, and cooked vegetables. Crunchy and chewy food such as chips, salads, bagels, nuts, etc, should be avoided. To relax the muscles of mastication, an increase of uid intake is suggested. e patient is advised to chew on the unin­volved side at the beginning, and progress to bilateral chewing when symptoms have improved. Eventually, chewing on the involved side is permitted when normal function has returned.
Electrophysical Agents
Heat, ice, transcutaneous electrical nerve stimulation (TENS), microcurrent electrical nerve stimulation (MENS), ultrasound, phonophoresis, iontophoresis, light therapy, cold laser, etc can be provided on an as needed basis to help with pain control and recovery.
59,105-108
Amongst the published research articles on the eective-
109
ness of TENS in TMD management, Ferreira et al,
based on their randomized control trial (RCT), concluded that TENS is superior to placebo to reduce pain intensity and muscular ac-
110
tivity. Awan et al,
based on their literature review on the use of TENS in the management of patients with TMD, concluded that TENS could play a signicant role in pain control for the masticatory musculature.
Microcurrent electric nerve stimulation is another type of electrophysical agent used for pain management. It has been postulated that this subthreshold stimulation can realign the
111
electrical properties of the injured tissues. Saranya et al
com­pared the eect of TENS and MENS in acute and chronic masticatory muscle pain. ey concluded that both approach­es were equally eective in pain reduction and mouth opening improvement; yet, MENS showed better and more immediate eects in pain relief, and less negative eects such as post-pro­cedure paresthesia.
Low-level laser (LLL) light therapy has gained attention in recent years for its analgesic and anti-inammatory eects. It has been postulated that the infrared radiation wavelength can increase the release of endogenous epions, improve microcircu­lation, increase lymphatic drainage, increase the production of adenosine triphosphate (ATP), and reduce nerve cell membrane
Soft Tissue Mobilization
Myofascial release, soft tissue mobilization, and massage can decrease edema, improve circulation, and restore tissue ex­tensibility. Massage therapy has been proven to be one of the eective interventions for the management of patients with TMD. Soft tissue mobilization also should be applied to the cervical area.
Manual Lymphatic Drainage
Manual lymphatic drainage is an eective method to mo­bilize the lymphatic system and to decrease edema and restore circulatory eciency. is method is especially eective in the management of postoperative conditions involving the head, neck, and TMJ regions.
Joint Mobilization
Joint mobilization is used to increase mobility of the TMJ and cervical spine and to restore normal kinematics of the in­volved joints. Mobilization of the TMJ also can be used for pa­tients with anterior disk displacement with and without reduc­tion. Long axis distraction, anteromedial translation, anterior or posterior rotation, medial glide, and lateral glide joint mobi­lizations can be applied to the TMJ while the patient is supine or sitting. Muscle energy technique (MET) can be added at the end of long axis distraction to elicit reexive relaxation of the
15,115
masticatory muscles.
A cadaveric study by Ho et al
116
showed that the mandib­ular condylar head rotates anteriorly and translates anteriorly and inferiorly during passive mouth opening. eir work fur­ther suggested that a unilateral inferior glide with anteromedial translation (UIGAT) or a bilateral inferior glide with anterior translation (BIGAT) can be applied if anterior or inferior move­ment of the condyle or jaw opening is limited. Also, the UIGAT or a lateral glide can be applied if the lateral movement of the condyle is limited. To our knowledge, this is the only study in this eld to justify the eectiveness and desired direction of TMJ mobilization.
Upper cervical spine distraction and mobilization is of great importance because of the close connection of the cervical spine to the TMJ and the ear. e use of mid-lower cervical spine mobilization, when indicated based on the examination of the patient, is also an important intervention to ensure opti-
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29
mal patient management. Patients can also be instructed on the
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use of sustained natural apophyseal glide (SNAG) to be used as a self-help home program.
117
Joint Manipulation
Joint manipulation in the management of TMD is used for ADDwoR, a dislocated condyle, and the cervical spine. In many research articles, the “manipulation technique” that was used was not clearly described. Most of the time, it appeared to refer to a manual skill more like a mobilization technique, in contrast to a thrust-manipulation technique. For the consisten­cy of reporting the evidence in this area, we will keep the word “manipulation” as used by the authors of the original papers, while acknowledging the dierent uses of the term.
Temporomandibular joint manipulation is indicated for acute closed lock (ADDwoR) or acute dislocation. ese con­ditions may be caused by prolonged dental procedures or acute trauma. Sometimes, the TMJ manipulation (reduction) for disk displacement is performed by a medical doctor or dentist while
118
the patient is under general anesthesia.
For acute non-trau­matic TMJ dislocation, which is usually caused by chewing or yawning, a manipulation (reduction) without anesthesia by a skilled clinician can be eective.
119
Gonai et al
120
described an
extraoral autoreduction technique for patients with recurrent
119
dislocation of the TMJ and Gorchynski et al
described a “sy­ringe technique” to reduce an acute nontraumatic TMJ disloca­tion in the emergency department. Performing these reduction techniques requires advanced training. Please refer to the rele­vant references for detailed descriptions.
121
Nagata et al,
in their RCT, studied the ecacy of man­dibular manipulation on patients with limited mouth opening (<35 mm) caused by ADDwoR. e authors reported that the manipulated group showed improvement in mouth opening after the rst visit, while the therapeutic exercise group exhib­ited a similar eect for mouth opening, pain, and joint sound. However, the “manipulation techniques” described in this arti­cle appeared similar to extraoral and intraoral TMJ mobiliza­tion techniques, as opposed to high velocity, small amplitude “thrust” techniques.
rust manipulation of the cervical spine has been rec­ommended and shown eective in some studies for the overall management of individuals with TMD.
122,123
Adelizzi et al
124
conducted a systematic literature review on the eectiveness of thrust-manipulation of the cervical spine for TMD. Based on the review of 6 articles, the authors concluded that cervical spine manipulation along with other non-surgical interventions may be benecial in achieving positive eects in patients with TMD.
Mansilla-Ferragut et al
122
and Oliveira-Campelo et al
123
both reported positive immediate eects of atlanto-occipital joint thrust-manipulation on mouth opening and PPT. Many orthopaedic physical therapists have the skills to perform thrust-manipulation techniques for the upper cervical spine.
125
Reynolds et al
conducted an RCT on the eectiveness of cervical spine manipulation added to behavioral education, soft tissue mobilization, and exercise for people with TMD with myalgia. ey reported that both experimental and com­parator groups improved over time with only small dierences measured by the Jaw Functional Limitation Scale, Tampa Scale of Kinesiophobia for TMD, and global rating of change, and that the additive clinical eect of cervical spine manipulation to standard care for treating TMD remains unclear.
Therapeutic Exercises
One often used exercise approach is to instruct the patient on cervical spine ROM and TMJ controlled-opening exercis­es, 6 repetitions of each exercise, to be performed 6 times a day (6x6). Controlled mouth opening exercise is performed by keeping the tip of the tongue on the palate and opening the mouth slowly without excessive protrusion. e 6x6 exercise program is performed on a time-contingent basis, to be done approximately every 2 hours throughout the day, regardless of symptoms. e purpose is to remind the patient of good pos­ture and to provide timely stretching of the tissues involved. Diaphragmatic breathing is encouraged at all time for general relaxation. Isometric TMJ exercises to relax the elevators and provide stabilization for the masticatory system are also import­ant. Cervical spine isometric and deep neck exors activation exercises are often added for patients who demonstrate weak­ness or poor endurance of the cervical musculature.
126
Lindfors et al
used a postal questionnaire to study pa­tients’ experiences of jaw exercise in the treatment of mastica­tory myofascial pain. e majority of participants (73% of 109 patients) reported that the jaw exercises not only reduced their symptoms but also provided condence in self-management.
127
Storm Mienna et al
also studied experiences of supervised jaw-neck exercise among patients with localized TMD pain or TMD pain associated with generalized pain. A 10-session su­pervised exercise program, which included relaxation, coordi­nation, and resistance training of the jaw, neck, and shoulders, was given to the study group. e authors found that an indi­vidualized, progressive, graded exercise program was benecial in reducing pain and providing self-ecacy for these patients
128
with either localized or generalized pain. Lindfors et al, international modied Delphi study, concluded that jaw exer-
in an
cises were an eective treatment for myalgia of the jaw muscles, restricted mouth opening, and disk displacement without re­duction. is point of view is consistent with the international consensus of TMD experts.
129
Dickerson et al
conducted a systematic review and me­ta-analysis of the eectiveness of exercise therapy for TMD. Based on the 6 included articles, they concluded that exercise therapy had moderate treatment eects in the short-term and varying amounts of long-term treatment eects for patients with TMD. ere was no consensus of exercise dosage, other than a range of repetitions from 5 to 10, and daily sets from 5 to
30
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For personal use only. No other uses without permission.
10. Future research with a larger sample size to study the adher-
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ence to home exercises and the proper dosing of exercises would be benecial in providing better guidance for dosage of exercise.
Spray and Stretch
61
Travell and Simons
have indicated that trigger points in the temporalis and masseter muscles can refer pain to the max­illary teeth and mandibular teeth, respectively. Patients with the complaint of a toothache should be examined carefully to rule out a trigger point as a potential cause before an irreversible dental procedure is performed. To relieve trigger points and promote normalcy of soft tissues for patients with myofascial complaints, the method of spray and stretch with Ethyl-Chlo­ride or Fluori-Methane has proven eective. is approach will be described briey in the special technique section while a detailed description is provided in the textbook by Travell and Simons.
61
Dry Needling
Dry needling performed by physical therapists has gained increasing recognition across the United States in the past sev­eral years. Dry needling is the practice of inserting acupuncture needles into the trigger point of a muscle. e goal is to deac­tivate the trigger points and provide pain relief. In 2012, Gon-
130
zalez-Perez et al
reported the positive eect (pain reduction and ROM improvement) of dry needling in the trigger points of the lateral pterygoid muscle of patients with TMJ myofascial pain. ey further reported in 2015 that dry needling in the lateral pterygoid muscle showed better ecacy than oral medi­cation for patients with chronic myofascial pain, for outcomes of mouth opening, lateral excursion, protrusion, and pain in­tensity.
131
Fernandez-Carnero et al
132
investigated the eects of dry needling of active trigger points in the masseter muscle in patients with TMD. ey concluded that the application of dry needling signicantly improved PPT and maximal jaw opening in the participants in the experimental group as compared to those who received sham dry needling. Blasco-Bonora et al
133
applied dry needling to the myofascial trigger points of patients with sleep bruxism and TMD. ey reported an immediate and 1-week improvement in pain, sensitivity, jaw opening, and TMD-related disability.
134
Vier et al
conducted a systematic review and meta-anal­ysis to study the eectiveness of dry needling for patients with orofacial pain associated with TMD. Despite some studies sug­gesting that dry needling is better than sham therapy for im­provement in PPT and some other interventions for improve­ment in pain intensity, they were not able to draw denitive conclusions due to the low quality of the research designs, in­cluding small sample sizes, of the studies included in the review.
135
Similarly, Machado et al
conducted a systematic review of dierent substance injections and dry needling for treatment of TMJ myofascial pain. ey found that dry needling and lo­cal anesthetic injections seemed promising, but better research
designs and longer follow-ups were needed to draw denitive conclusions.
Dry needling has attracted increasing interest in the eld of physical therapy. However, the widespread use of dry needling for TMD management still needs to be guided by better quality research.
Kinesio Taping
e speculated purpose of applying Kinesio tape is to pro­vide lymphatic drainage, increase circulation, and take advan­tage of natural self-healing processes. A few studies have been conducted in recent years to examine the eects of Kinesio taping on individuals with TMD. Coskun Benlidayi et al,
136
based on their single-blind RCT, reported that Kinesio taping in conjunction with counseling and exercise was more eective than counseling and exercise alone in improving disability and increasing mouth opening in a group of patients with TMD. Lietz-Kijak et al
137
assessed the short-term eectiveness of Kine­sio taping and trigger point release in patients with masticatory muscle disorders. ey found both methods were benecial in relieving latent trigger points through the analgesic eects. A more favorable outcome was observed in the Kinesio taping group.
Kinesio taping is a relatively inexpensive and simple meth­od of treatment. It can be considered as an adjunct intervention for managing TMD. However, its clinical use needs to be sup­ported by further well-designed clinical trials.
Home Programs
Self-care programs include awareness of posture and tongue resting position, progression from a soft diet to a normal diet, chewing on both sides of the mouth at the same time or alternating sides to minimize excessive muscle tension, avoid­ing parafunctions, applying heat or ice as indicated, performing time-contingent cervical spine and TMJ exercises, practicing general relaxation (with relaxation tapes or music), participating in a daily cardiovascular exercise program (30 minutes treadmill or stationary bike), and managing stress for control of chronic pain.
SPECIAL PHYSICAL THERAPY TECHNIQUES
Soft Tissue Mobilization and Myofascial Release
Extraorally, gentle pressure can be applied over the masse­ter, temporalis, frontalis, suprahyoid, and infrahyoid muscles, according to the patient’s tolerance. Massage over the masseter muscles can follow the direction of the bers, or be cross-sec­tional, with mouth closed or open (which places the masseter muscle under stretch). Addressing the upper trapezius, levator scapulae, and suboccipital musculature with appropriate tech­niques is also important. Acupressure points along the zygomat­ic arch, temple area, and medial corners of the orbital groove are eective locations for headache relief. One can apply a rm pressure or use circular motion of the ngertips (bilaterally) for 30 seconds on each location.
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31
For intraoral techniques, therapists must wear latex-free
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gloves on their hands for protection and to avoid unwanted al­lergic reactions of the patients. To start the intraoral approach, the clinician rst uses the index nger or thumb to gently stretch the buccal tissue and the orbicularis oris. is will relax the mouth area. en, with the index nger, follow the mandib­ular arch to pass the posterior molar, move superiorly towards the maxilla, and ask the patient to gently elevate the mandible. e clinician will feel tension under their index nger that is caused by contraction of the medial pterygoid muscle. is is a very tender spot. If it is tolerated by the patient, the clinician may exert static pressure for 30 seconds to release the tension in this area. e clinician may also use the tip of the small nger to follow the maxillary arch to the lateral-superior aspect of the back molar, which is the “lateral pterygoid muscle region,” and apply either gentle pressure or oscillation to provide release of tension. Again, this is a very sensitive area, and palpation may not be tolerated well by all patients.
Joint Mobilization
Joint mobilization for the TMJ includes longitudinal dis­traction, anteromedial translation, medial glide, and lateral glide. It is an eective intervention for restoration of kinematics of the TMJ.
Figure 13.
Unilateral Longitudinal Distraction Mo-
bilization of the Temporomandibular Joint - Supine
Longitudinal distraction
e patient is supine with neck supported by a thin pil­low. e physical therapist stands at the head of the table, on the contralateral side (right side) of the treated joint (left TMJ), facing the patient’s head diagonally. e patient should be in­formed that you will put your thumb into their mouth to gently mobilize the jaw. e patient is also instructed in using a hand signal to indicate any discomfort. e physical therapist starts by palpating the patient’s left TMJ extraorally with the left in­dex nger and then places the right thumb intraorally over the patient’s left posterior mandibular molar. e mobilizing force is in the caudal direction along the vertical axis of the mandibu­lar ramus. e mandible is supported gently at the mandibular angle by the rest of the ngers of the right hand (Figure 13). After applying longitudinal distraction for the desired amount of time, the force is released and the mandibular condyle is re­turned to the initial resting position. If specic joint play is de­sired, the physical therapist may add tilting of the condylar head either posteriorly (with ulnar deviation of the mobilizing hand for “recapturing” the displaced disk) or anteriorly (with radial deviation of the mobilizing hand for increased opening through a kinematic path) before distracting the joint longitudinally.
Muscle energy technique can be added at the end of lon­gitudinal distraction to elicit reexive relaxation of the mastica-
15,115
tory muscles.
is technique is accomplished by asking the patient to contract the masseter muscle against the therapist’s thumb at the end of longitudinal distraction, and then to relax
after 7-10 seconds to permit further stretching of the masseter muscle by the therapist.
Anteromedial translation
After the longitudinal distraction is performed as described previously, the physical therapist can then translate the mandi­ble anteromedially along the horizontal axis of the mandibular ramus. After reaching the end of the translation range, the con­dyle is then moved back posteriorly and superiorly to return to the original position.
Anteromedial translation can also be performed bilaterally at the same time while the physical therapist stands at the head of the treatment table and translates the condyles caudally and anteriorly with both hands (Figure 14). Again, subsequent to the anterior translation, both condyles are moved posteriorly and superiorly back to their original position. Attention is given to any dierence in range, mobility, or joint play between sides.
e unilateral (Figure 15) and bilateral (Figure 16) mo- bilizations should also be performed with the patient seated, which is a more functional position. e patient’s cervical spine needs to be maintained in a neutral posture at all time during the mobilization techniques.
Lateral glide
A lateral glide technique is accomplished by using the in­traorally placed thumb as a fulcrum, and lightly grasping the
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Figure 14.
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Bilateral Anteromedial Translation Mo-
bilization of the Temporomandibular Joint - Supine
Figure 15.
Unilateral Anteromedial Translation Mo-
bilization of the Temporomandibular Joint - Sitting
mandibular angle with the other 4 ngers. en, move the con­dylar head laterally with the thumb. is technique can be per­formed with the patient either supine or seated.
Medial glide
A medial glide can be accomplished by mov­ing the mandibular angle laterally with the thumb placed intraorally (hooking the metacarpophalange­al [MCP] joint on the mandibular teeth) and trans-
Figure 16.
Temporomandibular Joint - Sitting lating the condylar head medially with the second and third ngers placed extraorally. eoretically, a medial glide can also be accomplished by perform­ing lateral glide of the contralateral TMJ. e medi­al glide is rarely done or indicated; however, it may be used for the purpose of evaluating or improving joint play.
Tongue-Controlled Mouth Opening Exercise
e tongue-controlled mouth opening exer­cise can be used for hypomobility, hypermobility, incoordination, and inammatory conditions. e patient is asked to keep the tongue on the palate, and then open the mouth slowly in a controlled manner. is exercise will keep the condylar head in its rotation range and restrict its anterior trans-
lation. Repetitive movements in this manner can re-educate a
hypermobile joint to return to its normal kinematics, provide
mobility to a hypomobile joint, decrease inammation through
restrictions of anterior condylar translation, and guide an unco-
Bilateral Anteromedial Translation Mobilization of the
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33
ordinated muscular system to regain its control. e patient is
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instructed to perform 3 sets of 6 repetitions of this exercise, 6 times during the day. As control of this exercise improves, the speed of the exercise can be increased (similar to oscillation) for further neuromuscular re-education.
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In addition, when the opening pattern no longer shows deviation or deection, the patient may practice wider opening without keeping the tongue on the palate for a more comfortable stretch.
Additional tongue-specic exercises can also be introduced to increase the exibility of the tongue and relax the mastica­tory system. is may include sticking the tongue out of the mouth; retracting the tongue back toward the throat; moving the tongue inside the mouth to touch the cheeks on either sides; and circling the tongue around the cheek and in front of the maxillary and mandibular teeth. In addition, puckering the cheek and other facial muscle exercises can promote the general relaxation of the orofacial area.
Isometric Temporomandibular Joint Exercise
is exercise is performed for the purpose of stabilizing the TMJ, not for strengthening the masticatory musculature. Once patients have mastered the skill of controlled opening, they may progress to isometric stabilization. e patient is asked to keep the tongue on top of the roof of the mouth, open the mouth slightly, then apply a rm but gentle force with the index nger (or index and long ngers) on the chin in dierent directions (ie, left, right, superior, inferior, forward, backward, and diago­nally). e exercise consists of maintaining the mandible in its original position while resisting the externally applied force. Ap­plying quick external forces to the mandible in a randomly cho­sen direction sequence can be used for the purpose of rhythmic stabilization (Figure 17). Isometric contraction for the depres­sors of the TMJ can be introduced by asking the patient to open their mouth against the resistance exerted by the dorsal aspect of the hand that is resting under the chin. e recommended hold time is 10 seconds, 6 repetitions each session. is maneu­ver can reexively inhibit the hyperactive mandibular elevators, often the case with TMD (Figure 18).
Figure 17.
Rhythmic Stabilization of the Temporo-
mandibular Joint
Figure 18.
Isometric Exercise of Mandibular Depressors for Relaxation of Mandibular Elevators (Masseter, Medial Pterygoid, Temporalis Muscles)
Horizontal Tongue Depressor Exercise
is exercise is designed to assist the patient with increas­ing lateral excursion and anterior translation of the condyles for improved joint play. A stack of tongue depressors (the number of tongue depressors varies according to the patient’s amount of mouth opening), with a rubber band on each end, is placed between the patient’s maxillary and mandibular teeth. e pa­tient is then asked to translate the mandible forward, backward, and from side to side. is exercise is eective for improving postoperative hypomobility. It also is often used to regain lateral excursion (hence mouth opening), protrusion, and retrusion of the TMJ (Figure 19).
Spray and Stretch
A ne stream of Ethyl-Chloride or Fluori-Methane vapo­coolant spray is applied directly over the aected muscle with trigger points. e muscle is put under stretch rst (for exam-
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34
© 2021 Academy of Orthopaedic Physical erapy, APTA, Inc. All rights reserved.
For personal use only. No other uses without permission.
Figure 19.
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Horizontal Tongue Depressor Exercise to
Improve Lateral Excursion
ple, keeping the mouth open to stretch the masseter muscle) and then the spray is applied from approximately 24 cm away, at a rate of 10 cm per second, for about 4 times. At the end of the spray, the physical therapist warms the muscle with hand strokes and applies further stretching to the muscle. e theory proposed by Travell and Simons
61
is that the coolant can abolish the supercial stretch reex of the fascia, which allows further stretching of the underlying muscles. By doing so, TMJ ROM can be increased and pain decreased.
60,61
For the treatment of TMD, this approach can be applied to the masseter, temporalis, and all cervical muscles.
SPECIFIC PHYSICAL THERAPY INTERVENTIONS FOR SELECTED DISORDERS
Anterior Disk Displacement
Physical therapy should focus primarily on patient educa­tion regarding proper head, neck, and jaw positioning, avoid­ance of parafunctions and clicking or popping of the joint, and an explanation of precipitating and perpetuating factors. Man­ual therapy with soft tissue mobilization and joint mobilization are also important interventions for the management of anterior disk displacement. e use of electrophysical agents and exercise principles for restoring normal head, neck, and TMJ alignment is eective in relieving the symptoms caused by both ADDwR and ADDwoR. Often, these basic physical therapy manage­ment techniques can eectively improve the patient’s function­al status. e goals of physical therapy in the management of TMJ disk displacement are to relieve symptoms, increase and normalize mouth opening, restore normal kinematics of the
TMJ, and promote oral function. Researchers disagree about whether a displaced TMJ disk can be “recaptured.” However, joint mobilizations of the TMJ with longitudinal distraction, anteromedial translation, and lateral glide are eective clinically in repositioning the disk for patients with an ADDwR. During mobilization, the clinician may add a small amount of posterior rotation of the condylar head with ulnar deviation of the wrist before anterior translation. is maneuver may provide addi­tional space for the disk to be relocated. In the case of acute and subacute ADDwoR, the goal of physical therapy is to relieve pain and unlock the TMJ. e same mobilization techniques can be used, and the eect is often favorable.
140
Mongini et al
reported that using “their special ma­nipulation technique” successfully decreased the symptoms of ADDwoR (increase mouth opening and decrease pain), during
142
a long-term follow-up. Yabe et al
used a “manipulative tech­nique” similar to the mobilization technique described earlier: longitudinal distraction performed on the involved joint with the patient in a supine position. ey reported that this was an eective reduction technique for disk displacement.
Some osteopathic energy techniques have been described
121
by researchers as “manipulation of the TMJ.” Nagata et al
re­ported that the Jog-type jaw manipulation technique plus con­ventional treatment was not more eective than conventional treatment alone in pain relief and restoring maximal mouth opening.
Again, readers should access each cited reference for a de­tailed description of the specic “manipulation” (manual) tech­nique used in each study.
143
Alajbeg et al
provided evidence that during 6 months of treatment for ADDwoR, simultaneous use of physical ther­apy and a stabilization splint was more eective in reducing deviations and improving mouth opening than was the use of
144
a stabilization splint alone. Stiesch-Scholz et al
studied the eects of medical treatment and physical therapy for ADDwoR. ey concluded that medical treatment (with pharmacological agents) and physical therapy (mobilization, exercises, and mas­sage), along with splint therapy, were eective in reducing pain and increasing jaw opening.
145
Kraus and Prodoehl
conducted a cross-sectional study and reported outcomes and patient satisfaction following indi­vidualized physical therapy treatment for ADDwoR. ey pro­vided patient education, behavioral modications, therapeutic exercises, neuromuscular re-education, manual therapy, and electrophysical agents as indicated, and tailored the program according to each patient’s condition. e authors concluded that individualized physical therapy treatment was eective in improving mouth opening, reducing pain, and providing pa­tient satisfaction.
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Alves et al
found only 2 studies examining the eective­ness of mandibular “manipulation” for ADDwoR. ey did not nd sucient evidence to support the procedure and recom-
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35
mended that future studies of high methodological quality be
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performed.
e specic exercise program for internal derangement of the disk is presented below. When physical therapy treatment is not successful in relieving the patient’s symptoms, further surgi­cal consultation should be recommended.
Figure 20.
Condylar Remodeling Exercise
Condylar remodeling exercise program
146
is exercise program was designed by Rocabado
for neuromuscular re-education of the TMJ. With a 1 cm (0.5 inch) piece of surgical tubing resting between the maxillary and mandibular central incisors, the patient is asked to move the jaw laterally to the contralateral side of the symptomatic joint. (If both joints are involved, then use the more symptomatic side as the ipsilateral joint). If the movement is pain-free, then “gentle biting” is incorporated at the end of the movement. e patient is then instructed to release the contraction before returning to the midline. e next phase is to perform the same routine, but to maintain the bite as the jaw is moved back to midline. If no symptom is reported, then the patient is instructed to perform the same procedure but with protrusion instead of lateral ex­cursion. After this phase, isometric contractions with tubing in place can be introduced via mandibular stabilization or tubing
40,146,147
distraction (Figure 20).
eoretically, this exercise can recruit the muscles of mastication to stabilize the disk via the compression force, and result in improved condyle-disk-emi-
40
nence congruency. Furto et al
used this exercise program in conjunction with other physical therapy techniques, such as mobilization, iontophoresis, and exercises, and found favorable improvement in disability and overall perceived change. Further research is recommended to justify the usage of this exercise program.
erapeutic exercise for clicking due to anterior disk displacement with reduction
Another therapeutic exercise was designed by Yoda et al
148
to reduce the clicking caused by ADDwR. e patient is in­structed to open their mouth maximally, causing the opening click, and then close the mouth along a protruded path (closing the mouth as if trying to contact the tips of the front teeth). Maintaining this protruded position during closing is thought to keep the disk on top of the condyle. At this point, the patient carefully retrudes the condyle just before the closing click oc­curs. is is called the disk repositioning mandibular position. Lastly, the patient is asked to open the mouth maximally again without an opening click. e above procedure is repeated 5 minutes after each meal and the patient is asked to maintain the disk repositioning position all day. Based on an RCT com­paring this exercise approach to a control group, Yoda et al
148
demonstrated positive eects in reducing joint clicking with their exercise program. Even though “recapturing of the disk” could not be proven with MRI, they believed that the decrease in joint noise may be due to an increase in joint space to al-
A, patient lightly bites the rubber tubing with inci­sors. B, patient translates rubber tubing to contra­lateral side (away from side of pain), then returns to middle position. If no pain is experienced, then pa­tient is asked to bite down after lateral translation and maintains the bite until returning to middle position. Same procedure may be performed with protrusion.
148
low smoother condylar translation.
Also, improvement of the clicking leads to reduction of interference in daily life. Further research is needed to study the long-term eects of this exercise program.
Posterior Disk Displacement
A patient with posterior displacement of the disk usually describes the condition as a sudden painful inability to close the mouth (open-lock). A closing click may also be reported. Management of the posteriorly displaced disk can be through the same interventions used for an anteriorly displaced disk and mobilization with longitudinal distraction. Most important­ly, avoid maximal mouth opening, and work on submaximal ROM exercises.
Myofascial Pain Disorder Syndrome
In addition to the traditional physical therapy manage­ment for TMD (eg, electrophysical agents, exercises, joint mobilization, postural correction, and body mechanic instruc­tions), treatment of MPDS also focuses on elimination of trig­ger points, reduction of precipitating factors, and elimination of perpetuating factors. Trigger points can be treated by vapor coolant spray and trigger point injection. Physical therapists trained in the spray and stretch approach can often disrupt the trigger point and reduce tautness and pain in the involved mus­cles. As discussed before, dry needling techniques have also been adopted by physical therapists in recent years to provide trigger point release in TMD management. Trigger point injection is
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© 2021 Academy of Orthopaedic Physical erapy, APTA, Inc. All rights reserved.
For personal use only. No other uses without permission.