[Evaluation on facial pattern of early childhood patients with T.M.J. dysfunction occurred after anterior crossbite correction].

Nihon Ago Kansetsu Gakkai Zasshi Pub Date : 1989-01-01
H Fukazawa, T Mukaiyama, T Kurita, J Urano, H Mitani
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Abstract

The purpose of this study was to investigate the facial pattern of early childhood patient with temporomandibular joint (TMJ) dysfunction (clicking) occurred after anterior cross-bite correction. Chincap appliance was engaged in all cases, with or without minor intraoral mechano-therapy. Materials were consisted of lateral and postero-anterior cephalograms of 50 japanese patients (6-9 years old), all showing anterior cross-bite with normal function of TMJ at pre-treatment stage. They were consisted of two groups, one was the group of 22 patients with TMJ dysfunction occurred after cross-bite correction and the other was the control group of 28 patients with no TMJ problem. Morphological measurements were done and compared between two groups. The results were as follows: 1) There was no significant difference between the TMJ group and the control group from the lateral facial pattern. 2) The upper and middle facial skeleton were symmetry in both groups, but the maxillary alveolar legion (CMo, U 1) of TMJ group was significantly from the antero-posterior view. 3) On the lower face (mandible) of the TMJ group, it was pointed out that the position of Gonion was significantly asymmetry and L 1 point and Menton were disclosed to have severe lateral displacement. It was cleared that a high incidence of temporomandibular joint dysfunction was found in mandibular asymmetry cases. It was concluded that a careful case-management is required for mandibular asymmetry patients during chicap-orthodontic therapy.

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[幼儿前牙矫正后颞下颌关节功能障碍患者面部特征的评价]。
本研究旨在探讨儿童早期颞下颌关节(TMJ)功能障碍(咔嗒声)患者在前牙交叉咬合矫正后的面部特征。所有病例均使用Chincap矫治器,配合或不配合轻微的口内机械治疗。材料包括50例日本患者(6-9岁)的侧位和后前位脑电图,治疗前均显示前交叉咬合,颞下颌关节功能正常。分为两组,一组为交叉咬合矫正后出现TMJ功能障碍的22例患者,另一组为无TMJ问题的28例患者。两组间进行形态学测量和比较。结果表明:1)颞下颌关节组与对照组在侧面形态上无显著差异。2)两组上、中面骨均对称,但颞下颌关节组上颌牙槽军团(CMo, U 1)的正后视图差异显著。3) TMJ组下面部(下颌骨)Gonion位置明显不对称,L 1点、Menton点外侧移位严重。结果表明,下颌不对称患者的颞下颌关节功能障碍发生率较高。结论:下颌不对称患者在牙缝正畸治疗中需要谨慎的病例管理。
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[Reconsideration of the bilaminar zone in the retrodiscal connective tissue of the TMJ. 1. Relation between discal fiber and the condyle and components around the disk]. [Reconsideration of the bilaminar zone in the retrodiscal connective tissue of the TMJ. 2. Fibrous structure of the retrodiscal connective tissue and relation between those fibers and the disk]. [Arthrographic investigation for the disk configuration with closed lock of the temporomandibular joint]. [Clinical studies on TMJ arthrosis in young people. A study of dental axis of lower molar teeth]. [Electromyographic study on lateral jaw movements].
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