Arch Aesthetic Plast Surg.  2014 Jun;20(2):80-84. 10.14730/aaps.2014.20.2.80.

Outcome Analysis of Extended, Long, Curved Ostectomy with Outer Cortex Grinding for Prominent Mandibular Angle and Broad Chin to Achieve V-line Contouring

• Yoo HS
• Choi S
• Kim J

• KMID: 2134142
• DOI: http://doi.org/10.14730/aaps.2014.20.2.80

Abstract

BACKGROUND
In Asian countries, patients with a square-shaped lower face want a narrow chin as well as improvements in the mandibular angle contour, which is called a "V-line shape." Currently, various surgical techniques have been developed for mandibuloplasty.
METHODS
We have developed an extended, long, curved ostectomy, which starts from the inferior mandibular margin below the lateral incisor to the angle, using reciprocating and oscillating saws. We also used a small round bur to grind the outer cortex of the chin and ramus. A total of 243 patients were included in this study from 2012 to 2014.
RESULTS
To analyze aesthetic outcomes, we compared mandibular angles and gonial-gonial (G-G) distances on preoperative three-dimensional computed tomography scans with postoperative images. Mandibular measurements demonstrated significant increments in angle degrees on the right (115.2degrees+/-11.1 vs 129.3degrees+/-11.5, P<0.05) and left sides (112.2degrees+/-10.2 vs 130.4degrees+/-11.3, P<0.05). The G-G distance was reduced postoperatively from 123.7 mm+/-7.9 to 110.0 mm+/-3.5 (P<0.05).
CONCLUSIONS
In this study, we demonstrate the effectiveness of our technique and assume that we can improve frontal shape and lateral contour with its use.

Keyword

Mandible; Mandibular osteotomy; Orthognathic Surgery; Orthognathic surgical procedures

MeSH Terms

Asian Continental Ancestry Group
Chin*
Humans
Incisor
Mandible
Mandibular Osteotomy
Orthognathic Surgery
Orthognathic Surgical Procedures