Showing posts with label mentoplasty. Show all posts
Showing posts with label mentoplasty. Show all posts

Saturday, February 10, 2018

#FatGrafting vs. #ChinImplant

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According to American Society of Plastic Surgeons procedural statistics
between 2000 and 2016 there was a 6% decrease in all cosmetic surgery performed but a 38% decrease in the number of chin operations performed. Between 2013 and 2016 there was a 14% increase in all cosmetic surgery but a 13% decrease in the number of chin augmentation operations. 78% of that decrease were women. Clearly chin surgery is becoming less popular especially for women.

Chin enlargement can be achieved by bone surgery (genioplasty), chin implant placement or injection of temporary or permanent fillers. Chin implant placement is currently the most popular method of chin enlargement. The implants can be made of silicone, goretex or medpor. Each method and type of implant is associated with its own pros and cons. The decrease in number of augmentation surgeries being performed is therefore likely due to dissatisfaction with chin implants. I covered the pros and cons of different implant materials in a previously blog Facial Implants - cheeks, chin, jaw.  The assessment of results for any of these methods focuses on the front to back chin projection, resolution of dimpled chin skin (mentalis muscle strain) and symmetry visible on a frontal view. For middle aged and older patients the presence and severity of marionette lines and lower lip-chin grooves also impact the results and are less likely to be improved by implants alone. This blog will focus on the methods themselves and their pros and cons.


Method Pros Cons
bone surgery (genioplasty) can lengthen vertically and front to back more swelling longer recovery time, blood supply to bone can be compromised, step off at outer corners of the bone cut, teeth can be damaged
chin implant permanent, squared male chin achievable visibility, possible implant displacement, possible infection
injectable filler local anesthesia only, quick recovery most only give temporary result, can only increase front to back projection
injected fat graft can be performed under local anesthesia, ideal for lower lip-chin groove filling, permanent unpredictable fat survival that can cause uneven contour or asymmetry, cannot form a square male chin, can only increase front to back projection, may need more than 1 session to achieve the desired result, can change with weight gain or loss

Although fat grafts and injectable fillers can soften marionette lines the ideal way to remove those lines is a facelift.
Squared Male           Round Female Chin

Square Male Medpor Chin Implant

Round Female Silicone Chin Implant

A published prospective study of 42 consecutive patients (32 female and 10 male aged 19 to 50 years mean age 28 years) who underwent chin augmentation by means of fat grafting between October of 2014 and January of 2016 showed that injection of 4 to 10cc (average 7.5cc) of fat reliably augmented the chin. All patients had not previously had chin surgery and wanted/needed only front to back chin augmentation without vertical lengthening. At 6 month follow up after surgery these patients retained 82% of the injected fat with resulting increased front to back chin projections of 3 to 11mm (average 7mm). The degree of fat survival was not related to the amount of fat injection in these small amounts. Only 3 of these patients requested another procedure for additional chin projection despite all 3 having gained more than 6mm in projection from the first procedure.

Weakness of the chin has been associated with up to 30 percent of rhinoplasty patients. Nevertheless, many rhinoplasty patients are not ready to commit to an implant to improve the chin area. These patients are much more likely to accept fat grafting to improve the chin contour. The recent increasing use of injected fat graft chin augmentation may make chin augmentation more popular with female patients.
Chin Implant Patient

Before (top) and 5 months after (bottom) surgery photos of secondary facelift and injection fat grafting to the chin. The marionette and laugh lines were reduced by a combination of facelift and fat grafting. 5cc of fat was placed in the lower lip chin groove and 8cc was placed directly into the chin. To rejuvenate the area and reduce chin dimpling (mentalis muscle strain).

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