Lower facial contouring surgery using a novel method: M-genioplasty

Esthetic Surgery of the Chin in Cis- and Transgender Patients-Application of T-Genioplasty vs. Single-Piece Segment Lateralization

Background and Objectives: Correction of lower face asymmetry still remains challenging in maxillofacial surgery. This report describes techniques for the lateral transposition of the symphyseal segment to restore lower face symmetry while maintaining gender-related features in cis- and transgender patients. Materials and Methods: A retrospective review of medical records of 31 patients who attended for esthetic corrective surgery after orthodontic camouflage or orthognathic treatment, or during facial feminization of the lower face between June 2021 and June 2023 was performed. Result: All patients underwent lateralization genioplasty (with or without advancement or setback), either with or without narrowing T-osteotomy supplemented with necessary procedures in order to obtain proper facial balance and desired esthetical effects, such as bichectomy, liposuction, and face and neck lift. The mean asymmetry of the chin was 5.15 mm and was surgically corrected either by single segment lateralization or T-shape narrowing genioplasty depending on the gender and esthetical requirements. No complications were reported. Conclusions: Lateral shift genioplasty serves as a powerful tool in primary and secondary corrective surgery for lower face asymmetry that maintains gender-specific facial features. It may serve either as an additive to orthodontic camouflage or a way to correct previous orthognathic surgery pitfalls. The surgeon performing esthetic genioplasty associated with gender-specific expectations must be trained in facelift and facial liposculpting techniques in order to provide the best results and properly choose the right procedures for the right patients.

Correcting the Broad, Flat and Short Chin Using Modified M-genioplasty

BACKGROUND

Several genioplasty techniques can narrow the width of the chin. Nevertheless, patients with a broad and short chin who received these methods were unsatisfied with the outcomes. The goal of this study was to analyze the clinical outcomes of modified M-shaped genioplasty for broad, flat and short chin deformity.

METHODS

Thirty-eight patients with broad, flat and short chins were included in this study from January 2019 to December 2021. The preoperative design was performed individually according to the data of the chin and the patient's desire of final chin shape. Narrowing and vertical elongating genioplasty was performed for all the patients with modified M-shaped genioplasty under general anesthesia according to the preoperative designs. All patients have completed the FACE-Q preoperatively and 3 months postoperatively. The results were evaluated by clinical appearances and FACE-Q scores.

RESULTS

The vertical lengthening of the chin was 2-5 mm, with an average of 3.02 mm. The horizontal narrowing width was 3-6 mm, with an average of 5.6 mm. FACE-Q scores in satisfaction with the chin increased significantly from 35.34 ± 9.57 to 72.95 ± 6.81. There were no severe complications took place during the time frame of 3-24 months postoperatively.

CONCLUSIONS

The modified M-shaped genioplasty preserved the bone structure in the midsymphyseal area and suprahyoid muscular attachments as far as possible, and the bone segments may be repositioned quickly. This technique produced reliable and esthetically satisfying results in correcting a short, flat and broad chin, with altered vertical length, slope, width and protrusion three-dimensionally.

LEVEL OF EVIDENCE IV

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Hairline Correction by Hair Transplantation for Reducing Apparent Face Length in Long-Face Women

BACKGROUND

The long-face morphology is associated with aesthetic concerns, and surgery is often necessary to correct excess length in the frontal plane, in the upper, middle, and lower thirds of the face. However, correcting midline facial length in the frontal plane alone does not provide facial harmony. This study introduces a novel approach to correcting long-face morphology using measurements in the frontal, oblique, and lateral views, and reducing hairline measurements using hair transplants.

METHODS

Eighty-three patients were enrolled in the study. The authors measured the midline facial length in the frontal plane and the lengths of the upper, middle, and lower thirds of the face. The authors also measured four additional distances in the oblique and lateral views, including the distance from the infratemporal hairline to the chin and from the sideburn to the chin. The patients' midfrontal hairlines were lowered, and the distances from the infratemporal hairline to the chin and from the sideburn to the chin were also shortened. The results were evaluated by patients and the surgeon using a five-point Likert scale.

RESULTS

The mean patient Likert score was 4.5 (range, 3 to 5), and the mean surgeon Likert score was 4.9 (range, 3 to 5). No patients experienced adverse events. Three patients required touch-up surgery at the recipient sites to increase the hair density.

CONCLUSION

This novel approach to correcting long-face morphology using hair transplants to decrease hairline measurements provided excellent facial harmony and symmetry.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

A New Concept of Narrowing Genioplasty: Home Plate-Shaped Sliding Osteotomy

BACKGROUND

Narrowing genioplasty is commonly performed among East Asian populations, as a broad and/or square chin can be aesthetically unappealing. This study was aimed to introduce the home plate-shaped sliding osteotomy technique for narrowing genioplasty and to evaluate the results of this technique.

METHODS

A retrospective chart review of 117 patients who underwent home plate-shaped sliding osteotomy alone between 2011 and 2019 was performed. The angles of oblique osteotomy lines and measurements of caudal repositioning, which significantly affect the postoperative chin shape, were evaluated.

RESULTS

The home plate-shaped sliding osteotomy technique was successfully accomplished for narrowing genioplasty as an isolated procedure. The mean distance of caudal repositioning was 3.9 ± 0.8 mm, and the mean angles of oblique osteotomy lines were 23.3 ± 4.8 degrees on the right and 21.8 ± 3.5 degrees on the left. This produced an aesthetically pleasing rounded and proportionately narrow chin. The incidence of minor complications was 6.0 percent. There were no major complications. In particular, the risk of inferior alveolar nerve injury was obviated, as an additional mandibular border osteotomy was not typically used with this technique.

CONCLUSIONS

This new surgical procedure for narrowing genioplasty provides improved aesthetic results by altering the chin shape, rather than reducing the transverse width of the chin. The versatility of this procedure allows the chin shape to be adjusted with respect to narrowing, vertical lengthening, anterior advancement, and asymmetric or cleft chin correction. The present study suggests that home plate-shaped sliding genioplasty may be an excellent alternative for correcting broad and/or square chins and more complex chin deformities.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.