Clinical research of angle-splitting ostectomy based on three dimensional computed tomography true-up technique.
- Author:
Yan-feng ZHAO
1
;
Yun-fei HAO
;
Ping LU
;
Xiao-nan ZHOU
;
Chang-feng QU
Author Information
- Publication Type:Journal Article
- MeSH: Adult; Bone Regeneration; Face; Female; Humans; Mandible; Masseter Muscle; Osteotomy; Tomography, X-Ray Computed
- From: West China Journal of Stomatology 2009;27(5):516-520
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo illustrate the morphological changes of mandible after angle-splitting ostectomy.
METHODSFrom January 2006 to April 2008, 10 cases had undergone mandibular angle-splitting ostectomy to reduce the width of the lower face. For each patient, CT datum of mandible at three stages (preoperative, immediate postoperative, 6 months postoperative) were collected. By the application software of reverse engineering (Surfacer V9) and true-up and dissection techniques based on three-dimensional spiral computed tomography (3D-CT), operative efficacy and bone regeneration at the operation area of angle-splitting ostectomy were evaluated 6 months postoperative.
RESULTS1) Concavity could be seen at the angle-splitting ostectomy area 6 months postoperative, especially at the mandibular external oblique line region. Average cup depth was (3.64 +/- 1.67) mm by contrasted to preoperative. Diminution of bone volume was 55% +/- 9% for the local operative area 6 months postoperative. 2) Bone regeneration could be seen at the area that mandibular outer cortex had been removed. Compared with immediate postoperative, ratio of neoformative bone was 84.6% +/- 7.3% 6 months postoperative. The main region of bone regeneration was mandibular angle.
CONCLUSIONMandibular angle-splitting ostectomy is an effective technique for reducing the width of the lower face. Masseter muscular movement should be restricted postoperative to prevent hyperostosis at the angle area.