征paper两篇~~
1. http://www.ncbi.nlm.nih.gov/pubmed/10225635
Vertical root fracture in endodontically versus nonendodontically treated
teeth: a survey of 315 cases in Chinese patients.
2. http://www.ncbi.nlm.nih.gov/pubmed/7673845
Vertical root fracture in nonendodontically treated teeth.
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谢谢!!
emily39m@yahoo.com.tw