Magnetic resonance imaging in the assessment of the temporomandibular joint structure following mandibular advancement.
- Author:
Jie-Jun SHI
1
;
Xiang-Long ZENG
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Child; Female; Humans; Male; Malocclusion, Angle Class II; pathology; therapy; Mandibular Advancement; Postoperative Period; Temporomandibular Joint; pathology
- From: Chinese Journal of Stomatology 2007;42(11):665-668
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the changes in the disc-condyle-fossa relationship following mandibular advancement.
METHODSTwenty-five patients (10 boys and 15 girls, 11.1 +/- 1.1 years) with class II division 1 malocclusions were treated with Activator. The average treatment time was 10.9 months. Parasagittal MRIs in closed mouth position were analyzed before and after Activator treatment by means of the pair-t test.
RESULTSCa-Tm value [(-0.1 +/- 1.5) mm and (-0.6 +/- 0.9) mm] of the left temporomandibular joint (TMJ) and Ca-Ca' value [(2.3 +/- 0.8) mm and (1.8 +/- 0.5) mm] of the right TMJ were changed significantly after Activator treatment (P < 0.05). This indicated that the condyle was located anteriorly in the fossa. No significant changes were found in the disc-fossa relationship and disc-condyle relationship (P > 0.05).
CONCLUSIONSActivator could promote the growth of the mandible and at the same time, it had no apparent negative influence on TMJ function.
