자연치열에 나타나는 측방 비중심교합의 유형과 전치부 수직피개도 및 frankfort-mandibular plane angle과의 관계에 관한 연구

Abstract

[한글]

저자는 자연치열에서 나타나는 측방 비중심교합의 유형과 전치부 수직피개도 및 Frailk fort-mandibular plane angle(FMA)와의 관계를 살펴보기 위하여 정상교합을 갖는 연세대학교 남학생 110명을 대상으로 임상검사 및 두부 방사선 규격사진을 이용하여 연구 분석

한 결과 다음과 같은 결론을 얻었다.

1. 측방 비중심교합 유형은 상, 하악 제 1대구치의 접촉거리를 기준으로 세균으로 구별 하였으며, 유형의 발생빈도는 Canine protected occlusion 8.2%, Partial group function

occlusion이 45.9%, Group function occlusion이 45.9%였다.

2. Canine protected occlusion과 Group function occlusion의 전치부 수직피개도*** 및 FMA****의 산술평균간에 유의의 차이를 보여 주었으며, 전치부수직피개도의 산술평균은 Canine protected occlusion**+ 보다 Group function occlusion**+이 작게 나타났으며

FMA의 산술평균은 Canine protected occlusion**+ 보다 Group function occlusion**++ 이 크게 나타났었다.

***t=-2.26, d.f,=117,P<0.05 ****t=12.54, d.f,=117, p<0.05

**+ 3.47±0.26mm **++2.60±0.15mm **+21.11±0.65 **++25.05±0.67

3. Extension of the Median test의 결과, 측방 비중심교합에 대한 전치부 수직피개도*** 및 FMA**+ 의 관계가 측방 비중심교합 유형별로 모중앙값간에 유의의 차를 보여주었다.

*X**2 =7.7, d.f=2, P<0.025 +X**2 =8.09, d.f=2, P<0.025

4. 전치부 수직피개도에 대한 FMA의 상관관계계수는 0.36이었다.

A STUDY OF LATERAL ECCENTRIC OCCLUSION PATTERNS AND THEIR RELATI0N TO THE INCISAL

OVERBITE DEPTH AND THE FRANKFORT-MANDIBULAR PLANE ANGLE IN NATURAL DENTITION

Hyun Gon Chung, D.D.S.

Dept. of Dental Science, Graduate School, Yonsei University

(Directed by Associate Prof HoYong Lee, D.D.S., Ph.D.)

In order to search the frequency of occurence of lateral eccentric occlusion

patterns and their relation to the Incisal overbite depth and the

Frankfort-mandibular plane angle (F M A) in natural dentition, clinical observation

and roentgenogrnphic cephalometric study was undertaken in 110 young male students

who have normal occlusion.

The following results were obtained:

1. Occlusion patterns were categolized into three groups depending on the

magnitudes of first molar contact on the working side. Percentage (frequency) of

occurence of occlusion groups were: Canine protected occlusion, 8.2%, Partial group

function occlusion, 45.9%, Group function occlusion, 45.9%.

2. There was a significant difference between the arithmatic mean of Incisal

overbite depth* and the means of F M A** The mean of Incisal overbite depth of

Canine protected occlusion group+ was higher than that of Group function occlusion

group++ and F M A of Canine protected occlusion groups was lower than that of Group

function occlusion.++ *t=-2.26, d.f,=117,P<0.05 **t=12.54, d.f,=117, p<0.05

+3.47±0.26mm ++2.60±0.15mm +21.11±0.65 ++25.05±0.67

3. A statistical test, Extension of the Median test, indicated that these was a

significant difference among the relation of occlusion groups and Incisal overbite

depth* and F M A+ from group to group. *X**2=7.7, d.f=2, P<0.025 +X**2=8.09,

d.f=2, P<0.025

4. The correlation coefficient between Incisal overbite depth and F M A was 0.36.

[영문]

In order to search the frequency of occurence of lateral eccentric occlusion patterns and their relation to the Incisal overbite depth and the Frankfort-mandibular plane angle (F M A) in natural dentition, clinical observation and roentgenogrnphic cephalometric study was undertaken in 110 young male students

who have normal occlusion.

The following results were obtained:

1. Occlusion patterns were categolized into three groups depending on the magnitudes of first molar contact on the working side. Percentage (frequency) of occurence of occlusion groups were: Canine protected occlusion, 8.2%, Partial group

function occlusion, 45.9%, Group function occlusion, 45.9%.

2. There was a significant difference between the arithmatic mean of Incisal overbite depth* and the means of F M A** The mean of Incisal overbite depth of Canine protected occlusion group+ was higher than that of Group function occlusion group++ and F M A of Canine protected occlusion groups was lower than that of Group function occlusion.++ *t=-2.26, d.f,=117,P<0.05 **t=12.54, d.f,=117, p<0.05 +3.47±0.26mm ++2.60±0.15mm +21.11±0.65 ++25.05±0.67

3. A statistical test, Extension of the Median test, indicated that these was a significant difference among the relation of occlusion groups and Incisal overbite depth* and F M A+ from group to group. *X**2=7.7, d.f=2, P<0.025 +X**2=8.09,

d.f=2, P<0.025

4. The correlation coefficient between Incisal overbite depth and F M A was 0.36.