[3-dimensional CT cephalometry before and after mandibular angle osteotomy and its clinical significance].
OBJECTIVE
To investigate the change of skeleton structure and masseter after mandibular angle osteotomy and its clinical significance in preoperative design.


METHODS
3-dimensional CT cephalometry was performed before and after surgery in 18 cases of prominent mandibular angle.


RESULTS
Pre- and post-operative data were compared. Significant differences between the pre- and post-operative data were found in the mandibular angle, the distance between mandibular angle, length of ramus, ectropion angle of mandibular angle, triangle Go-Me-Go, the thickness, width and length of masseter.


CONCLUSIONS
It indicates the skeleton structure is changed and some kind of atrophy happens in the masseter after operation. So we suggest partial resection of masseter should be unnecessary for mandibular angle osteotomy.
Li
Hui-Chao
HC
Plastic Surgery Hospital, Chinese Academy of Medical Science, Beijing 100144, China.
Li
Dong-Mei
DM
Zhang
Zhi-Yong
ZY
Lü
Chang-Sheng
CS
Liu
Yu-Feng
YF
Zhang
Ji
J
Gui
Lai
L
D002508:Cephalometry / Q000379:methods*; D005147:Facial Bones / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008334:Mandible / Q000000981:diagnostic imaging; D008406:Masseter Muscle / Q000000981:diagnostic imaging*; D010027:Osteotomy; D012886:Skull / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D055815:Young Adult