Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
part 1.doc
Скачиваний:
0
Добавлен:
01.07.2025
Размер:
4.96 Mб
Скачать

Emg application in therapeutical dentistry.

EMG investigations are performed at parodontitis for registration the changings of masticatory musculature contractive force regulation because masticatory apparatus functional-dynamic disorders are observed at this widely spread dental disease. It is performed with gnatho-dynamometric probes (mandibule force determining) which allow to know about correlation between muscles excitement intensivity and their force effects. There are disorders of correct alternations of bioelectrical activity and bioelectrical resting periods during mastication in patients with inflammatory-dystrophic parodontitis and with periodontitis.

Emg application in surgical dentistry.

All mentioned below 3 EMG types are applied during operations. Global or interferential one is used at jaws fractures, mandibular-facial region inflammatory processes (phlegmones, abscesses, periostitis, osteomyelitis), during myoplastic operations at tongue and mimic musculature strong paralyses. Local one – at masticatory muscles dystrophies and hypertrophies; in stomato-neurology during mandibular-facial region nerves traumatic and infectious injuries. Stimulational one – in stomato-neurology and surgical dentistry at facial nerve determining for its conductance and excitement velocity distribution determining as well as for mimic musculature paresis degree assessment.

Emg application in orthopedical dentistry.

Interferential EMG is applied for masticatory muscles bioelectrical activity assessment at teeth complete absence during adaptation to complete temporary dentures. Denturing with complete temporary dentures leads to masticatory muscles bioelectrical activity increasing during mastication with dentures and after their removal. During adaptation to complete temporary dentures all mastication time is reduced due to masticatory movements quantity decreasing and one masticatory movement time shortage. Masticatory muscles adaptation to new conditions on EMG indexes takes place during first 6 months of dentures usage. At bite height increasing after orthopedic treatment of teeth pathological wiping off with EMG bite hightening admitted boarders are under control. Central occlusion height increasing in admitted limits (8-10 mm) leads to temporal muscles resting bioelectrical activity. Such activity appearance in proper masticatory muscles is a symptom of excessive (more than 10 mm) bite increasing. EMG investigation allows to assess objectively the effectiveness of occlusion straightening out and to control symmetrical muscles activity co-ordination.

Emg application in children dentistry and orthodonthia.

Interferential EMG is applied for control of temporal and masticatory muscles functions co-ordinational correlations reorganization during bite anomalies treatment. Local one – for soft palate muscles bioelectrical activity study in children under norm and at congenital developmental anomalies. After soft palate fissures operative removal EMG is applied for operative determining the possibility of speech restoration prognosis as well as for control during muscles special trainings with myogymnastic exercises special complex.

  1. Study aims:

To know: excitement conductance mechanisms and regularities through nervous and muscular fibers; main factors determining conductance velocity; nervous fibers action potential forming and features; electromyogram formation mechanism.

To be able to: draw schematically excitement conductance mechanism through non-myelinated and myelinated nervous fibers.

  1. Pre-auditory self-work materials.

3.1. Basic knowledge, skills, experiences, necessary for study the topic:

Subject

To know

To be able to

Medical biophysics

Skeletal muscles electrical features peculiarities

Use electrical devices

Histology

Skeletal muscle histological structure

Differentiate skeletal muscle preparation

Neurology

Mechanism of nervous impulse distribution through nerves and muscles, excitable tissues general features and laws of work

Determine muscles tone and force

Sportive medicine

Laws of excitement wave distribution through nervous and muscular fibers, excitable tissues general features

Determine muscles tone and force

Dentistry (all branches)

Mechanism of nervous impulse distribution through nerves and muscles, excitable tissues general features and laws of work, possibilities of EMG usage

Interpret masticatory muscles EMG.

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]