Detection of root fracture is difficult since the fracture line is not apparent. A recent systematic review concluded that there was a lack of evidence-based data regarding the diagnostic accuracy of conventional radiographic signs for root fracture.OBJECTIVE:
To compare the diagnosis of maxillary molars with early root fracture by periapical film and cone-beam CT retrospectively.METHODS:
Forty teeth diagnosed as early root fracture of maxillary molars from 38 patients were included. Results of periapical film and cone-beam CT were compared.RESULTS AND CONCLUSION:
Among the 40 suspected teeth, 19 teeth were diagnosed as early root fracture by periapical film. The fracture line was located in the mesiobuccal root of maxillary molars. However, 30 teeth were diagnosed as early root fracture by cone-beam CT. Among them, 23 teeth had fracture lines in mesiobuccal root and 7 teeth had fracture line in palatal root. One tooth could not be found any fracture sign in cone-beam CT. After 6 months of conservative treatment, this tooth was extracted for palatal root fracture. Compared with periapical film, cone-beam CT is better in early root fracture diagnosis, especially for the teeth with fracture line in palatal root.Subject headings:
root fracture; cone beam CT; periapical film; maxillary molars; retrospective studyFunding:
Medical Health Project of Guangzhou, No. 20121A011151Funding:
Luo R, Chen GS. Detection of early root fracture in maxillary molar: cone beam CT versus periapical radiographs. Zhongguo Zuzhi Gongcheng Yanjiu. 2014;18(29):4712-4716.