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Case Study: Vertical Chin Reduction by Submental Ostectomy

 

Background: The chin is the prominent and most protruding structure of the lower face. It is a three-dimensional facial part that can have excesses and deficiencies of either the amount of projection, width or in its height. Because of the soft tissue that wraps around the chin bone, excessive or big chins pose greater aesthetic challenges than that of the small chin.

Having a big chin can involve any (or all) of the three dimensions and the surgical technique to reduce it varies based on these dimensions. In order of difficulty, the wide chin is the simplest to effectively change and the horizontal overprojecting chin can be the most challenging. The vertically long chin offers an intermediate level of difficulty, and like the chin that sticks out too far, the biggest challenge is how to predictably shrink the enveloping soft tissue to avoid a postoperative sag.

The vertically long chin can be reduced by two methods. The traditional approach is to use an intraoral osteotomy (genioplasty) and remove a wedge of bone either from above or below the osteotomy cut. The main advantage of this technique, besides the avoidance of an external scar, is that the soft tissue attachments to the underside of the chin bone are not disrupted. The alternative approach is to remove the bone from below through a submental incision, detaching and then reattaching the neck and chin soft tissues after the bone is removed. The advantage of this approach is that any redundant soft tissues of the chin can be directly removed and tightened and the superior attachments of the mentalis muscle is not disrupted.

Case Study: This 40 year-old female wanted a shorter and less long chin. She had a chin implant placed at the time of a previous rhinoplasty, at the suggestion of her surgeon, but it made her chin too big and it was subsequently removed. Despite its removal, she still wanted an even shorter chin. She acknowledged that she already had a small chin, by everyone else’s standards, but to her it was still too big. She just wanted the bottom part of it ‘cut off’.

Under general anesthesia, a 3.5 cm incision was made behind the submental skin crease. The soft tissue attachments to the bottom of the chin were detached and the exits of the menral nerves identified. A reciprocating saw was used to remove an 8mm segment of he bottom portion of the chin bone. The bone edges were smoothed with a rotating burr. Drill holes were made in the outer cortical edge of the chin and sutures were used to resuspend the strap muscles of the neck . Excess skin, fat and mentalis muscle was removed from the back side of the incision and the a layered soft tissue closure done, tucking it under the submental area.

Her postoperative course had the typical swelling which ensues with some expected temporary skin numbness. By 3 weeks after surgery, most of her swelling was gone but it took a full 6 weeks to see the final result and have all feeling return to normal. When seen at 3 months afetr surgery, she had a noticeable vertical chin reduction and no soft tissue tissue sag.

The submental ostectomy approach to vertical chin reduction is an effective alternative to the more traditional intraoral bony wedge resection approach. It may be the preferred approach when substantial soft tissue tightening is needed in addition to the bone reduction or a previous intraoral reduction procedure did not produce satisfactory results.

Case Highlights:

1) The length of the chin can be successfully reduced like other chin dimensions.

2) Vertical reduction of the chin can be done through either an intraoral wedge ostectomy/genioplasty or a submental ostectomy, of which the intraoral approach is the most common.

3) The submental vertical chin reduction removed the lower end of the chin bone as well as excises and resuspends the soft tissue chin pad and upper neck tissues.

Dr. Barry Eppley

Indianapolis, Indiana

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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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