Mandibular movement characteristics in patients with skeletal class Ⅲ malocclusion during chewing movement
10.3969/j.issn.1001-3733.2009.04.027
- VernacularTitle:骨性Ⅲ类错(牙合)患者咀嚼时下颌运动特点的初步研究
- Author:
Yan XU
;
Xiaojiang YANG
;
Xiaohui GAO
- Publication Type:Journal Article
- Keywords:
Skeletal class Ⅲ malocclusion;
Three-dimension supersonic analysis technique;
Mandibular movement characteristic;
Chewing movement
- From:
Journal of Practical Stomatology
2009;25(4):567-571
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate mandibular movement characteristics in patients with skeletal class Ⅲ malocclusion during chewing different foods. Methods: 14 skeletal class Ⅲ adult patients with mandibular asymmetry, 10 patients without mandibular asymmetry and 10 normal control cases were chosen to find out the different condylar and incisor movement area ratio based on the aid of ARCUSdigma mandibular moving track analysis system. Results: First,during chewing soft food, the condylar tracing length of skeletal class Ⅲ adult patients with mandibular asymmetry were significant different in sagittal and horizontal plane compared with the other two groups(P<0.05), while the incisor point trajectory difference was not statistically significant. Second, the condylar and incisor movement characteristic showed much more different among three samples during chewing brittle food(P<0.05). Third, in sagittal plane, the deflective condylar movement area ratio was significantly higher than that of the other two groups during chewing hand food(P<0.01). Conclusion: The mandibular movement in skeletal class Ⅲ adult patients are affected obviously by the shape and texture of food. Asymmetric lower mandible patients have a greater preponderance of this phenomenon.
