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SECOND EDITION
Atlas of
FACIAL IMPLANTS
LEAD EDITOR
Michael J. Yaremchuk, MD
Clinical Professor of Surgery Harvard Medical School Chief of Craniofacial Surgery Massachusetts General Hospital Boston, MA, USA
ASSOCIATE EDITORS
Catherine S. Chang, MD
Beverley Hills, CA Former Fellow, Adult Reconstructive & Aesthetic Craniomaxillofacial Surgery Division of Plastic & Reconstructive Surgery Massachusetts General Hospital Boston, MA, USA
Erez Dayan, MD
Reno, Nevada Former Chief Resident Harvard Plastic Surgery Boston, MA, USA
Mohamed Amir Mrad, MD, FRCSC, MBA,
FACS
King Faisal Specialist Hospital and Research Centre Department of Surgery Plastic Surgery Section Riyadh, Saudi Arabia
Alan Yan, MD
Fellow, Chang Gung Memorial Hospital, Taiwan Former Fellow, Adult Reconstructive & Aesthetic Craniomaxillofacial Surgery Division of Plastic & Reconstructive Surgery Massachusetts General Hospital Boston, MA, USA
For additional online content visit ExpertConsult.com
© 2020, Elsevier Inc. All rights reserved. First edition 2007
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek permission, further information about the Publisher’s permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/permissions.
This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein).
Notices
Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds or experiments described herein. Because of rapid advances in the medical sciences, in particular, independent verication of diagnoses and drug dosages should be made. To the fullest extent of the law, no responsibility is assumed by Elsevier, authors, editors or con­tributors for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions, or ideas contained in the material herein.
ISBN: 978-0-323-62476-3
Content Strategist: Belinda Kuhn Content Development Specialist: Sharon Nash Project Manager: Julie Taylor Design: Renee Duenow Illustration Manager: Paula Catalano Illustrator: Kip Carter Marketing Manager: Claire McKenzie
Printed in China
Last digit is the print number: 9 8 7 6 5 4 3 2 1
Preface
This atlas presents the use of alloplastic implants uti­lized for aesthetic and reconstructive applications of the craniofacial skeleton. In the decade since I wrote the first edition of the Atlas of Facial Implants much has transpired in related technology, clinical applications and implant design. For example, Computer Aided Design (CAD)/ Computer Aided Manufacture (CAM) of implants is rapidly evolving not only for cranial reconstruction, but also for aesthetic applications. Cranial implants are now designed not only for protective or aesthetic indications, but also with functional components (implantable neuro­technology - e.g. pressure monitoring, drug delivery).
Recent studies have shown that critical areas of the facial skeleton resorb with aging and hence, facial implants have shown to be an important adjunct in rejuvenative aesthetic surgery. Implants now have an accepted role in
refining orthognathic surgical procedures and surgically treating Graves’ ophthalmopathy. These innovations are included in this second edition.
In addition, the 10-year clinical experience has afforded many new insights into this surgery providing improved results and avoiding as well as treating complications.
This edition includes chapters arranged in five sections. As before, the first section, Background, includes chapters addressing implant fundamentals. It is followed by sec­tions addressing implant applications for each anatomic facial third - Upper, Middle and Lower Face. A fifth sec­tion, Developing Applications, now includes chapters addressing implant use in facial rejuvenation, CAD/CAM aesthetic surgery and postorthognathic surgery refine­ment. Videos of the implant procedure appropriate to each anatomic area are now included.
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Acknowledgments
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My co-authors, Doctors Catherine Chang, Erez Dayan, Amir Mrad and Alan Yan, were indispensable in the preparation of this book. They are all previous trainees at the Massachusetts General Hospital and the Boston Center and are now practitioners spread throughout the world.
Kip Carter, Chief of Medical Illustration Services at the College of Veterinary
Medicine at the University of Georgia, once again added his artistic precision and nuance to the Atlas of Facial Implants. His illustrations are obviously key to the visual presentation of this work.
Finally, Elsevier’s Sharon Nash, Belinda Kuhn and Julie Taylor coordinated
our efforts with great skill and professionalism.
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to
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MARILYNN
and KAIT
as well as
CHARLES and DEUCE (CHARLES II)
Chapter 1
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Indications for facial implants
The shape of the human face is composed of a skeletal bony framework that is covered by a soft tissue envelope. Overall, skeletal proportions are probably the most important component of facial attractiveness.
Fritz E. Barton Jr., 2009
Since the skeletal infrastructure of the human face is fundamental to its appearance, its surgical change can be powerful. Conceptually, autogenous bone would be the best material to restore or augment the craniofacial skeleton because it has the potential to be vascularized and, then, incorporated into the facial skeleton. In time, it can be biologically indistinguishable from the adjacent native skeleton. Practically, the use of autogenous bone to augment facial skeletal contours is limited. Donor site morbidity as well as the time and operative costs associated with autogenous bone graft harvest can be significant. Furthermore, the inevitable resorption and the poor handling characteristics of autogenous bone grafts limit the quality and predictability of the aesthetic result. With the exception of interposition grafts used to reconstruct segmental load-bearing defects of the max­illa and mandible, the majority of craniofacial skeleton replacements and, particularly, facial skeleton augmen­tation is done with alloplastic implants. A diagrammatic survey of the alloplastic implants used for facial skeletal reconstruction and enhancement is presented in Fig. 1.1. Subsequent chapters will address each anatomic area.
Patients with normal, deficient, and surgically altered or traumatically deformed anatomy may all benefit from implant augmentation of their craniofacial skeleton.
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Fig. 1.1 A diagrammatic survey of the alloplastic implants used for facial skeletal reconstruction and enhancement.
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Chapter 1 Indications for facial implants
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FACIAL BALANCE AND DEFINITION
Most often, facial skeletal augmentation is done to enhance facial appearance in patients whose skeletal relationships are considered within the normal range. They want more definition and angularity to their appearance. Other patients desire to “balance” their facial dimensions. The woman in Fig. 1.2 underwent chin and mandible angle augmentation at the time of rhytidectomy to provide angularity and balance between her upper and narrower lower face. 
Fig. 1.2 A 52-year-old woman underwent mandible augmentation, chin augmentation, and rhytidectomy. (A) Preoperative frontal and (B) preoperative lateral view. (C) Diagrammatic representation of implant augmentation. (D) Postoperative frontal and (E) postoperative lateral view.
A
C
B
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E
SKELETAL DEFICIENCY
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Craniofacial deformities that are disfiguring and are of functional consequence to vision, breathing, and mastication usually require skeletal osteotomies and rearrangement as treatment. Less severe midface and mandibular hypopla­sia are common facial skeletal variants. In patients with these morphologies, occlusion is normal or has been compensated by orthodontics. These patients have neither respiratory nor ocular compromise. In skeletally deficient patients whose occlusion is normal or has been previously normalized by orthodontics, skeletal repositioning would necessitate additional orthodontic tooth move­ment. Such a treatment plan is time-consuming, costly, and potentially mor­bid. It is, therefore, appealing to few patients. In these patients, the appearance of skeletal osteotomies and rearrangements can be simulated through the use of facial implants. Diagrammatic representations of how implant surgery can mimic the appearance of skeletal osteotomies are shown in Figs. 1.3 and 1.4.
Skeletal deciency
Fig. 1.3 Diagrams show how multiple implant augmentation of the midface skeleton can simulate the visual appearance of Le Fort III osteotomy and advancement without altering dental occlusion. (A) Illustration of midface concavity and class III malocclusion. Dotted line shows potential lines of osteotomy. Arrow shows anticipated advancement. (B) Osteotomy and advancement at the Le Fort III level provides midface projection and class I occlusion. Note change in soft tissue prole. (C) Illustration of corrected class I skeletal occlusion after orthodontic tooth movement. (D) Multiple implants augmented the midface skeleton whose occlusion was corrected by orthodontia as shown in (C). The implants project the soft tissue envelope to mimic the contour of the soft tissue envelope of Le Fort III skeletal osteotomy and advancement.
A
C
B
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Chapter 1 Indications for facial implants
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A
Fig. 1.4 Diagrams show how implant augmentation of the mandible can simulate the visual appearance of sagittal and horizontal osteotomy with advancement without altering dental occlusion. (A) Mandibular deciency with class II occlusion. Dotted line shows potential lines of osteotomy. Arrows show anticipated advancement. (B) After sagittal split osteotomy with horizontal osteotomy advancement of the chin to increase chin projection. Note that the occlusion has been corrected from class II to class I. Note change in soft tissue prole. (C) Mandibular deciency after corrected class I occlusion. (D) The skeletal deciency of mandibular deciency has been augmented with implants. Note that the class I occlusion is unchanged. Also note the change in soft tissue prole. Notice the absence of border regularities that are inherent with skeletal osteotomies.
B
C
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D
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