A comparative study of cone-beam computed tomography and periapical radiography in the diagnosis of external apical root resorption
10.3969/j.issn.1671-8348.2014.19.002
- VernacularTitle:锥形束CT 和根尖片诊断根尖区牙根外吸收的比较研究
- Author:
Yanling DONG
;
Jun CHEN
;
Feng DENG
;
Leilei ZHENG
;
Hongyu REN
- Publication Type:Journal Article
- Keywords:
root resorption;
cone-beam computed tomography;
periapical radiography;
orthodontic treatment
- From:
Chongqing Medicine
2014;(19):2404-2406
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the accuracy of cone-beam computed tomography (CBCT ) and periapical radiography in the diagnosis of simulated external apical root resorption (EARR) .Methods The study sample comprised 160 single-rooted premolars for simulating 4 degrees of EARR :no(intact teeth) ,mild(cavity of 1 .0 mm in diameter and depth in root surface) ,moderate(1 .0 mm root shortening) ,and severe(3 .0 mm root shortening) .Two sets of radiographic images were acquired with CBCT and periapi-cal radiography .The severity for all resorption lesions were evaluated blindly by one calibrated examiner .The percentages of correct classification of each degree of EARR were compared between the two imaging techniques using McNemar test .Results With CBCT method ,the percentages of correct classification of no ,mild ,moderate ,severe and all EARR were 95 .0% ,97 .5% ,42 .5% , 87 .5% and 80 .6% ,respectively ;with periapical radiography method ,the percentages were 85 .0% ,42 .5% ,70 .0% ,92 .5% and 72 .5% ,respectively .Significant differences were found between the two imaging techniques for evaluating mild ,moderate ,and all-EARR(P<0 .05) .Conclusion CBCT imaging is more reliable than periapical radiography for detecting EARR ,whereas it is not sensitive to moderate root shortening .In orthodontic practices ,CBCT could be applied to the early diagnosis of EARR ,in order to help make the decision on continuation and modification of orthodontic treatment .
