Efficacy of W-genioplasty on the broad and short chin
10.3760/cma.j.issn.1671-0290.2023.01.005
- VernacularTitle:颏部W形截骨矫正颏部宽短畸形的效果
- Author:
Zhiyang XIE
1
;
Sheng GAO
;
Kaili YAN
;
Tong LU
;
Chao HU
;
Shu WANG
;
Wensong SHANGGUAN
;
Guoping WU
Author Information
1. 南京医科大学附属友谊整形外科医院整形外科，南京 210029
- Keywords:
Mandible;
Osteotomy;
Genioplasty;
Short chin;
Broad chin
- From:
Chinese Journal of Medical Aesthetics and Cosmetology
2023;29(1):19-22
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the clinical effect of W-shaped genioplasty in the correction of broad and short chin deformity.Methods:Thirty-eight patients (5 males, 33 females, aged 20 to 41 years, mean 27.3 years) complained with broad and short chin were admitted to the Affiliated Friendship Plastic Surgery Hospitalof Nanjing Medical University from January 2019 to December 2021. CBCT scan and three-dimensional reconstruction were performed to design osteotomy line and determine the distance of chin lengthening, narrowing and advancing or retrocession preoperatively. Under general anesthesia, the W-shaped osteotomy was performed using an intraoral incision, and the angle between the bilateral free bone fragments, the distance of downward and forward movement were adjusted to change the curvature, width, length and prominence of the lower edge of the chin according to the preoperative designs. The results were evaluated by clinical appearances and image analyses at a follow-up of 3-24 months.Results:The amount of vertical lengthening of the chin in 38 cases were 2 mm to 5 mm, with an average of 3.02 mm. The horizontal narrowing width distances were 3-7 mm, with an average of 5.6 mm. The patients were followed up for 3-24 months, with an average of 10.6 months. There were no complications such as hematoma, wound dehiscence, accidental fracture, surgical area infection and permanent neurosensory disorder. 38 patients had transient sensory loss in the lower lip region of varying degrees, but all recovered spontaneously during routine follow-up period. All patients were satisfied with the improvement of facial contour.Conclusions:W-shaped geinoplasty preserves the central bone of the chin and the attachment of genioglossus muscle, which does not affect the normal anatomy and physiological function of the oral cavity. After osteotomy, the bone is removed and the bilateral bone fragments move flexibly. It can effectively change the radian, width, length and protrusion of the lower edge of the chin in three dimensions, so as to correct the wide and short deformity of the chin.
