Journal of the Korean Academy of Pediatric Dentistry 2012;39(2):139-144.
Published online May 31, 2012.
ACCURACY OF CONE-BEAM COMPUTED TOMOGRAPHY IN PREDICTING THE DIAMETER OF UNERUPTED TEETH
Seong Hee Kim, Young Jong Kim, Shin Kim, Tae-Sung Jeong
Department of Pediatric Dentistry, School of Dentistry, Pusan National University 
Cone-beam computed tomography를 이용한 미맹출 영구치의 계측
김성희, 김영종, 김신, 정태성
부산대학교 치의학전문대학원 소아치과학교실
Correspondence:  Tae-Sung Jeong,  Tel: 055-360-5181, Email: tsjeong@pusan.ac.kr
Received: 28 February 2012   • Accepted: 15 May 2012
Abstract
The purpose of this study was to evaluate the accuracy and reproducibility of measuring the size of unerupted permanent tooth via cone beam computed tomography(CBCT). Ten children were scanned with dental CBCT,and 3-dimensional reconstruction of the dentitions were generated CBCT. Mesio-distal dimension and buccolingual dimension of the teeth were made directly on the model with a high-precision digitalcaliper and on the CBCT by using three-dimensional dental imaging software. Reliability and accuracy were assessed by using intraclass correlation and paired t-tests. (p<0.05) The results were as follows : 1. Intraclass correlations were above 0.9 for Both the CBCT and the model measurements, showinghigh reliability. 2. Although there were high correlation values(r=0.91) between CBCT and model messurement methods, comparisons between the CBCT and model messurement methods showed a statistically significant difference(p<0.05). 3. The CBCT measurements tended to slightly underestimate by 0.2 mm. But, the systematic difference of CBCT measurements were clinically acceptable Therefore, CBCT measurement method can be used to measure the size of unerupted teeth in a sufficiently accurate way.
Key Words: CBCT(Cone-beam computed tomography), Unerupted teeth, Tooth size


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