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《Journal of Clinical Stomatology》 2011-12
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Estimating angle fractures associated with mandibular third molar removal by panoramic radiographs

QIN Xu,ZHOU Bin,MA Wei,CHEN Wei-min.Department of Stomatology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Hubei Wuhan 430030,China.  
Objective:To estimate angle fractures associated with mandibular third molar removal by panoramic radiographs.Method:The panoramic radiographs of 186 cases containing 347 mandibular third molars from June 2009 to June 2010 were randomly choose,the ratio of residuary mandibularbone height(b) to the total mandibular height(a)(ratio b/a) was analyzed.The ratio b/a was also retrieved from 6 cases with mandibular fracture after third molar surgery.Result:The distribution of the ratio b/a of 347 cases is consistent with Gaussian distribution,and the ratio b/a in 2 cases was lower than 0.3(0.58 %).The ratio b/a in the 6 cases with mandibular fracture after third molar surgery were also less than 0.3.Conclusion:There was a higher risk when the ratio b/a is less than 0.3,which would be strongly implied through the panoramic radiograph analysis.
【CateGory Index】: R782.1
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