3차원 두부방사선규격사진의 정확성에 관한 연구
The comparative study of three-dimensional cephalograms to actual models and conventional lateral cephalograma in linear and angular measurements
배기선, 이상률, 손홍주,
소속 상세정보
배기선 ( ) - 부산대학교 치과대학 교정학교실
이상률 ( ) - 부산대학교 치과대학 교정학교실
손홍주 ( ) - 부산대학교 치과대학 교정학교실
KMID : 0361919970270010129
Abstract
Conventional cephalometrics have inherent errors because their evaluation is performed in two-dimension for threedimensional object. To compensate these errors, three-dimensional cephalograms - derivation of three-dimensional data from conventional lateral and postero-anterior cephalograms - were developed.
In this study, the accuracy and precision of three dimensional cephalograms were determined by means of 10 linear and 12 angular measurements on 36 acrylic skull models and by the comparison of conventional lateral cephalograms.
The results were as follows
1. Mean difference between three-dimensional cephalograms and actual models in linear measurements was 0.94±0.62 mm and mean rate of magnification of three-dimensional cephalograms was 100.31±0.91%. There were no statistically significant differences between three-dimensional cephalograms and actual models in linear measurements(a 0.1).
2. Mean difference between conventional lateral cephalograms and actual models in linear measurements was 6.44±1.48 mm and mean rate of magnification of lateral cephalograms was 106.99±1.45%. There were statistically significant differences between lateral cephalograms and actual models in linear measurements(P<0.005).
3. Mean difference between three-dimensional cephalograms and actual models in angular measurements was 1.22±0.82° and mean rate of magnification of three-dimensional cephalograms was 105.71±12.07%. There were no statistically significant differences between three-dimensional cephalograms and actual models in angular measurements( a=0.1).
4. Mean difference between conventional lateral cephalograms and actual models in angular measurements was 1.70±0.94° and mean rate of magnification of lateral cephalograms was 106.35±15.70%. There were no statistically significant differences between lateral cephalograms and actual models in angular measurements( a =0.1). There were similarity between three-dimensional and lateral cephalograms in angular measurements.
키워드
3차원 두부방사선규격사진;Three-dimensional cephalograms
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