Details

Autor(en) / Beteiligte

• Yu, X
• Liu, J Q
• Yuan, L J
• Mao, L X
• Zhu, M
• Fang, B

Titel

MRI analysis of the effect on mandibular retrusion with anterior disc displacement treated by using Herbst appliance

Ist Teil von

• Zhonghua kouqiang yixue zazhi, 2017-03, Vol.52 (3), p.171

Ort / Verlag

China

Erscheinungsjahr

2017

Quelle

MEDLINE

Beschreibungen/Notizen

• To investgate the effect of Herbst appliance on the growth and remodeling of the temporomandibular joint (TMJ) in class Ⅱ patients with mandibular retrusion by using MRI. Between December 2010 and October 2014, 12 class Ⅱ patients (11-16 years old) with mandibular retrusion were chosen. The patients were divided into two groups. The control group included 7 patients (14 joints) with normal disc condyle relationship and the anterior disc displacement (ADD) group included 5 patients (10 joints) with anterior disc displacement. The MRI images of TMJ were measured, including condylar height, joint space index and disc position ratio, before and after the treatment. The condylar height of the patients in the control group was significantly increased ( 0.001) after treatment, and no significant difference in joint space index ( 0.821) and disc position ratio ( 0.146) was found. The joint space index of the patients ([-14.70±8.82]% and [4.90±11.35]%) in ADD group changed significantly ( 0.001) after treatment, and n