Relationship between lower facial morphology and the size of masseter and medial pterygoid by CT scanning
- VernacularTitle:咬肌、翼内肌与下颌角肥大的相关性研究
- Author:
Yongcheng XU
;
Lin YUAN
;
Jianhui LI
- Publication Type:Journal Article
- Keywords:
Masseter muscles;
Pterygoid muscles;
Enlarged mandibular angle;
Tomography, X ray computed
- From:
Chinese Journal of Medical Aesthetics and Cosmetology
2001;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To determine the mechanism underlying the mandibular angle enlargement and to provide a morphological basis for correcting the enlarged mandibular angle. Methods By axial computed tomography, it is possible to measure the width and length of the masseter and the medial pterygoid, the gonial angle, and the vertical height of the posterior mandible. The date were initially analysed by using a simple correctionials and indpendent sample T test. Results The distance between two Go points and gonial angle were significantly related with the thickness of masseter muscle, but the thickness of the medial pterygoid was on the contrary. There was significant differences between the group of prominence and the normal control in the gonial angle, the distance between two Go points and thickness of masseter . But there was no difference between the the two groups in the thickness of medial pterygoid. Conclusion The thickness of the masseter muscle is an important factor that affects the lower facial morphology. The hypertrophy of masserter muscle may cause the mandibular angle enlargement.
