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- W2360403211 abstract "PURPOSE:This study was aimed to evaluate the effects of orthodontics-orthognathic surgery for skeletal Class Ⅲ malocclusion on temporomandibular joint(TMJ)disc position and configuration with magnetic resonance imaging.METHODS:Twenty-four patients with Class Ⅲ dentofacial deformity were studied.The patients treated with pre-operative orthodontics,bilateral sagittal split ramus osteotomy(SSRO),post-operative orthodontics were studied clinically,radiographically and with magnetic resonance imaging(MRI)in two different phases in order to locate the position of the temporomandibular joint(TMJ)disc in relation to the glenoid fossa.The data was analyzed by SPSS11.0 software package for paired t test.RESULTS:Abnormal joint sound disappeared in one of three patients with joint sound before surgery,one patient with pre-operative pain in the joint had no pain after surgery.There were no TMJ symptoms in 20 of 24 patients preoperatively and postoperatively.48 sagittal magnetic resonance imagings showed the mean disc length was 8.288mm preoperatively,8.097mm postoperatively,no statistically significant difference was found between the two phases of the study.The mean displacement of the TMJ disc measured was 1.383mm preoperatively and 2.193mm postoperatively with no statistically significant difference(P0.05).CONCLUSION:Skeletal Class Ⅲ malocclusion can be corrected successfully through orthodontic and orthognathic treatment for facial appearance and occlusion.Clinical and magnetic resonance imaging analysis find no significant changes on position of TMJ disc and length of disc after orthognathic surgery.Degenerative joint change is not improved by operation." @default.
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- W2360403211 date "2007-01-01" @default.
- W2360403211 modified "2023-09-24" @default.
- W2360403211 title "The changes of temporomandibular joint disc position and configuration in orthodontics surgery treatment:a magnetic resonance imaging investigation" @default.
- W2360403211 hasPublicationYear "2007" @default.
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