단층 및 두부 방사선 계측사진을 이용한 부정교합자의 악관절에 관한 연구

Abstract

[한글]

부정 교합 환자의 악관절 부위에 대한 연구는 교정 치료의 진단 치료 및 예후의 추정에 있어서 중요한 의미를 갖는다. 저자는 결손치나 보철물이 없고 교정 치료를 받은 경험이 없으며 전신 건강 상태가 양호한자 중에서 정상 교합을 갖는 성인 44명 교정 치료전 cla

ssⅡ 성인 환자 30명과 classⅢ 성인 환자 30명을 선정하여 측방 두부 방사선 규격 사진과 악관절 단층 방사선 사진을 중심 교위와 중심 교합 상태에서 촬영하여 각각에서의 관절와내 하악 과두의 위치 관계를 측정 비교 분석하여 다음과 같은 결과를 얻었다.

1. 정상군과 Class Ⅱ군에서 관절와에 대한 하악 과두의 위치는 중심 교합에 비해 중심 교위 관계에서 후상방 쪽으로 위치하였으나 ClassⅢ군에서는 유의성 있는 위치의 변화가 없었다.

2. cLassⅢ군에서는 정상군과 classⅡ군에 비해 하악 과두의 위치가 중심 교위와 중심 교합에서 관절와내 상방에 위치하였다.

3. 관절 융기 후방 경사도와 상악 중절치 설측 경사도 사이의 상관 관계는 정상군에서는 높은 상관 관계가 있으나 부정 교합자 군에서는 상관 관계가 없었다.

4. 하악 과두의 수평 경사도는 정상군 20.32°±8.12°, ClassyⅡ군 25.08°±4.83°, classⅢ 14.69°±4.08° 이었다.

A STUDY OF THE TEMPOROMANDIBULAR JOINT IN MALOCCLUSI0N USING TMJ TOMOGRAM AND

CEPHALOGRAM

Soon Chang Hong

Department of Dental Science, Graduate School, Yonsei University

(Directed Young Kyu Ryu, D.D.S., Ph.D.)

The purpose of this study was to investigate the difference between normal and

malocclusion subjects in Temporomandibular joint. This study was based on the 44

subjects with normal occlusion, 30 subjects with ClassⅡ malocclusion, 30 subjects

with ClassⅢ malocclusion before treatment.

After submental vertex view analysis, each subject was given the TMJ Tomogram in

centric relation and centric occlusion and the Cephalogram was taken with Quint

Sectograph. The TMJ spaces were measured and analyzed statistically. Following

results were obtained.

1. When centric relation was compared to centric occlusion, The condyles were

positioned more posteriorly and superiorly in centric relation position of the

normal occlusion group and the classⅡ malocclusion group. In the ClassⅢ

malocclusion group. There was no significant difference in the condylar position

between centric occlusion and centric relation.

2. The condyles of the ClassⅢ malocclusion group were positioned more superiorly

than the normal occlusion group and the ClassⅡ malocclusion group.

3. In the correlation between articular eminence posterior slope angle and

lingual slope angle of the upper anterior central incisor, there was significant

correlation in the normal occlusion group. But no significant correlation was found

in the malocclusion group.

4. The mean value of the horizontal angulation of condylar head to the transear

rod axis plane was 20.32°±8.12° in the normal occlusion group, 25.08°±4.83°

in the classⅡ malocclusion group, 14.68°±4.08° in the classⅢ malocclusion

group.

[영문]

The purpose of this study was to investigate the difference between normal and malocclusion subjects in Temporomandibular joint. This study was based on the 44 subjects with normal occlusion, 30 subjects with ClassⅡ malocclusion, 30 subjects

with ClassⅢ malocclusion before treatment.

After submental vertex view analysis, each subject was given the TMJ Tomogram in centric relation and centric occlusion and the Cephalogram was taken with Quint Sectograph. The TMJ spaces were measured and analyzed statistically. Following results were obtained.

1. When centric relation was compared to centric occlusion, The condyles were positioned more posteriorly and superiorly in centric relation position of the normal occlusion group and the classⅡ malocclusion group. In the ClassⅢ malocclusion group. There was no significant difference in the condylar position

between centric occlusion and centric relation.

2. The condyles of the ClassⅢ malocclusion group were positioned more superiorly than the normal occlusion group and the ClassⅡ malocclusion group.

3. In the correlation between articular eminence posterior slope angle and lingual slope angle of the upper anterior central incisor, there was significant correlation in the normal occlusion group. But no significant correlation was found

in the malocclusion group.

4. The mean value of the horizontal angulation of condylar head to the transear rod axis plane was 20.32°±8.12° in the normal occlusion group, 25.08°±4.83° in the classⅡ malocclusion group, 14.68°±4.08° in the classⅢ malocclusion group.