3-D CT를 이용한 악교정수술후의 하악 과두 위치와 하악폭경 및 하악각의 평가 (3-D CT EVALUATION OF CONDYLE HEAD POSITION, MANDIBULAR WIDTH, AND MANDIBULAR ANGLE AFTER MANDIBULAR SETBACK SURGERY)

서지정보

· 발행기관 : 대한구강악안면외과학회
· 수록지 정보 : 대한구강악안면외과학회지 / 35권 / 4호 / 229 ~ 239페이지
· 저자명 : 김재원, 김재현, 이상한, 이동현, 이수연

초록

The purpose of this study is to evaluate the change in condylar position, width, and angle before and after orthognathic surgery using 3-dimensional
computed tomograph.
Pre and posterative 3-D CT was taken on 38 patients and through axial, frontal, sagittal measurements and by 3-dimensional reconstruction, the
changes in condylar postion, mandibular width and angle were analyzed and others such as the difference in gender, operation and fixation method,
setback length and in relation with temporomandibular disorders were done together too.
The results were as follows: The inward rotation of condyle in axial condylar angle, the forward movement of right condyle in sagittal anterior-posterior
distance, the superior movement of both condyles in sagittal superior-inferior distance, the decrease in gonial angle, the increase in mandibular
width, the decrease in distance between the axial coronoid process distance and the increase in the frontal intercondylar distance were statistically significant.
There were no statistically significant changes in gender difference, however in the difference in operation method, change in the gonial angle
was observed and there was more change in bilateral sagittal split osteotomy group compared to two-jaw surgery group. In the difference in fixation
method, the decrease in axial coronoid process distance and the change in sagittal anterior-posterior distance were statistically significant. In the difference
in setback, the increase in setback didn't relate directly with the increased change in condyle position. In the relation with temporomandibular disorder,
changes in left axial condylar angle and axial coronoid process distance were statistically significant.
Changes in condylar position could be observed after the orthognathic surgery but it doesn't seem to have much of a clinical importance. The orthognathic
surgery is effective in decreasing the mandibular angle, and it is not related with the temporomandibular disorder.

영어초록

The purpose of this study is to evaluate the change in condylar position, width, and angle before and after orthognathic surgery using 3-dimensional
computed tomograph.
Pre and posterative 3-D CT was taken on 38 patients and through axial, frontal, sagittal measurements and by 3-dimensional reconstruction, the
changes in condylar postion, mandibular width and angle were analyzed and others such as the difference in gender, operation and fixation method,
setback length and in relation with temporomandibular disorders were done together too.
The results were as follows: The inward rotation of condyle in axial condylar angle, the forward movement of right condyle in sagittal anterior-posterior
distance, the superior movement of both condyles in sagittal superior-inferior distance, the decrease in gonial angle, the increase in mandibular
width, the decrease in distance between the axial coronoid process distance and the increase in the frontal intercondylar distance were statistically significant.
There were no statistically significant changes in gender difference, however in the difference in operation method, change in the gonial angle
was observed and there was more change in bilateral sagittal split osteotomy group compared to two-jaw surgery group. In the difference in fixation
method, the decrease in axial coronoid process distance and the change in sagittal anterior-posterior distance were statistically significant. In the difference
in setback, the increase in setback didn't relate directly with the increased change in condyle position. In the relation with temporomandibular disorder,
changes in left axial condylar angle and axial coronoid process distance were statistically significant.
Changes in condylar position could be observed after the orthognathic surgery but it doesn't seem to have much of a clinical importance. The orthognathic
surgery is effective in decreasing the mandibular angle, and it is not related with the temporomandibular disorder.

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