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        下顎骨 運動時 顆頭의 移動範圍에 關하여

        崔瀚業 大韓顎顔面 放射線學會 1978 Imaging Science in Dentistry Vol.8 No.1

        The purpose of this study was to investigate the normal range of condylar movement of normal adults. The author has observed roentgenographic images of four serial positions of condylar head taken by modified transcranail lateral oblique projection. The serial positions are centric occlusion, rest position, I inch open position and maximal open position. The results were obtainde as follow; 1. Inter-incisal distance was 46.85㎜ in maximal open position. 2. The length between the deepest point of glenoid fossa and summit of condylar head in rest position was wider than that in centric occlusion by 0.8㎜. 3. In 1 inch open position, condylar head moved forward from the standard line in 12.64㎜ of horizontal direction and moved downwards from the standard line in 1.84㎜ of vertical direction. 4. In maximal open position, condylar head moved forward from the standard line in 19.06㎜ of horizontal direction and moved downwards from thestanard line in 0.4㎜ of vertical direction. 5. In centric occlusion, the width between glenoid fossa and margin of condylar head was greater in the posterior portion than in the anterior portion by 0.4㎜. 6. Except for the estimated figures of 1 inch open position, all of the estimated figures was greater in male than in female.

      • SCOPUSKCI등재

        顎關節規格撮影法에 依한 顆頭位의 分析 硏究

        崔瀚業 大韓顎顔面 放射線學會 1983 Imaging Science in Dentistry Vol.13 No.1

        The purpose of this study was to investigate the radiographic images of the condylar head in clinically normal subjects and the TMJ patients using standardized projection technique. 45 subjects who have not clinical evidence of TMJ problems and 96 patients who have the clinical evidence of TMJ problems were evaluated, but the patients who had fracture, trauma and tumor on TMJ area were discluded in this study. For the evaluation of radiographic images, the author has observed the condylar head positions in closed mouth and 2.54㎝ open mouth position taken by the standardized transcranial oblique lateral projection technique. The results were as follows: 1. In closed mouth position, the crest of condylar head took relatively posterior position to the deepest point of the glenoid fossa in 8.9% of the normals and in 26.6% of TMJ patients. 2. In 2.54㎝ open mouth position, condylar head took relatively posterior position to the articular eminence in 2.2% of TMJ patients and 39.6% of the normals. 3. In open mouth position, the horizontal distance from the deepest point of the glenoid fossa to the condylar head was 13.96㎜ in the normals and 10.68㎜ in TMJ patients. 4. The distance of true movement of condyalr head was 13.49㎜ in the normals and 10.27㎜ in TMJ patients. 5. The deviation of mandible in TMJ patients was slightly greater than that of the normals.

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