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Posts Tagged ‘revisional chin surgery’

Case Study: Sliding Geniopasty with Indwelling Chin Implant

Sunday, May 3rd, 2015

 

Background: Horizontal chin augmentation can be done using either a synthetic chin implant or a sliding genioplasty. There are advantages and disadvantages with either approach and they must be considered in an individual patient basis. The decision in any patient ultimately depends on their perception of an alloplastic vs. an autogenous approach, the risks of the procedure and its recovery and what other dimensional changes of the chin that are needed beyond just that of the horizontal change.

But the use of a chin implant does not always produce the desired amount of chin augmentation change that every patient desires. This may be due to inadequate implant selection, the chin implant settling into the bone thus losing some horizontal projection, chin implant malposition or an accommodation to the initial chin augmentation result.

When further improvement is desired after an initial chin implant augmentation, the options are either a larger implant or to convert it to a sliding genioplasty method. A larger implant is usually done as this is the simplest revisional approach provided that a new implant can create the desired horizontal change. When a larger chin implant offers but a modest additional augmentation (e.g., 5mms or less) the the sliding genioplasty option becomes a consideration. It would be either that or have a custom chin/jaw implant made.

Chin Implant Settling (Erosion) Dr Barry Eppley IndianapolisCase Study: This 26 year-old male wanted additional chin augmentation after having a prior chin implant placed several years previously. He always felt that is lower jaw was smaller. His original chin implant provided 7mms of horizontal projection but it could be seen that it had settled into the bone a few millimeters. He opted for a sliding genioplasty as he felt that would more reliably give him long-term augmentation.

Sliding Genioplasty with Chin Implant intraop Dr Barry Eppley IndianapolisUnder general anesthesia, an intraoral approach was used to access the chin. The chin implant was easily identified and it was nestled nicely into the bone. A horizontal osteotomy cut was made above it from side to side and the bone downfractured. The chin segment was then advanced 12mms and stabilized with a step plate and screws. The chin implant was never moved from its original position during the procedure.

Sliding Genioplasty with Chin Implant result Dr Barry Eppley IndianapolisSliding Genioplasty with Chin Implant 3D CT scan Dr Barry Eppley IndianapolisA sliding genioplasty can be successfully done with an indwelling chin implant. It can be argued that this is a good technique to take advantage of some of the prior procedure (and investment) and gain additional horizontal augmentation. Whatever implant settling has occurred into the bone has already reached its peak and no further inward change would be anticipated.

Case Highlights:

1) An unsuccessful chin implant result can be improved by a sliding genioplasty.

2) It is not always necessary to remove an existing chin implant when doing a sliding genioplasty.

3) A sliding genioplasty can be performed by making the osteotomy cut above the chin implant and moving both forward simultaneously.

Dr. Barry Eppley

Indianapolis, Indiana


Dr. Barry EppleyDr. Barry Eppley

Dr. Barry Eppley is an extensively trained plastic and cosmetic surgeon with more than 20 years of surgical experience. He is both a licensed physician and dentist as well as double board-certified in both Plastic and Reconstructive Surgery and Oral and Maxillofacial Surgery. This training allows him to perform the most complex surgical procedures from cosmetic changes to the face and body to craniofacial surgery. Dr. Eppley has made extensive contributions to plastic surgery starting with the development of several advanced surgical techniques. He is a revered author, lecturer and educator in the field of plastic and cosmetic surgery.

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