대한구강악안면병리학회지 제44권 제2호 (p.43-48)

|원 저|
파노라마방사선사진에서 극좌표를 이용한 안면 비대칭 분석

Facial Asymmetry Evaluation on Panoramic Radiograph by Polar Coordinate
키워드 :
Polar coordinates,Facial asymmetry,Panoramic radiography

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. MATERIALS and METHODS
   1. 연구대상
   2. 파노라마방사선사진과 투사방법
   3. 안면선의 길이 측정과 각도 측정
   4. 자료분석
Ⅲ. RESULTS
Ⅳ. DISCUSSION
Ⅴ. CONCLUSION
REFERENCES

초록

This study aimed to measure ramal lengths and angles on panoramic radiography applying a polar coordinate system for analyzing facial asymmetry within normal range. Panoramic radiographs taken from 15 males and 15 females (mean age 31.33±3.7 yrs in males and 28.87±2.72 yrs in females) with symmetric-looking faces were selected. The polar coordinate system, length of condylar and ramal height and angles between the ramus tangent and the connecting line of the most inferior point of bilateral orbital rim were measured from panoramic radiographic images. Bilateral differences in the ramal and condylar heights and angles were determined by asymmetric index. The polar coordinate applied for analyzing facial asymmetry uses length and angle measure. The normal range of facial asymmetry was measured using mean and standard deviation of asymmetry index of length and angle measure. A new analysis method using polar coordinate system on panoramic radiograph may provide more accurate analysis for facial asymmetry.