Separated root tip formation associated with a fractured tubercle of dens evaginatus: A case report

作     者：Zhi-Fang Wu Ling-Jiao Lu Hai-Yan Zheng Yan Tu Ying Shi Zi-Huai Zhou Lin-Xian Fang Bai-Ping Fu 

作者机构：Department of Pediatric DentistryThe Affiliated Hospital of StomatologySchool of StomatologyZhejiang University School of MedicineKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhou 310006Zhejiang ProvinceChina Department of ProsthodonticsThe Affiliated Hospital of StomatologySchool of StomatologyZhejiang University School of MedicineKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhou 310006Zhejiang ProvinceChina Department of EndodonticsThe Affiliated Hospital of StomatologySchool of StomatologyZhejiang University School of MedicineKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhou 310006Zhejiang ProvinceChina 

出 版 物：《World Journal of Clinical Cases》 (世界临床病例杂志)

年 卷 期：2021年第9卷第12期

页      面：2944-2950页

核心收录：

学科分类：1003[医学-口腔医学] 100302[医学-口腔临床医学] 10[医学] 

基　　金：National Natural Science Foundation of China,No.81801028 Natural Science Foundation of Zhejiang Province,No.LQ19H140001 

主　　题：Separated root tip Dens evaginatus Tubercle fracture Young permanent tooth Revascularization Case report 

摘      要：BACKGROUND Several previous studies have reported an unusual root formation in which a fractured apical fragment of an immature root continued to develop independent of the main root after trauma to an immature *** date,there have been only rare reports of the continuing apical formation of the fractured root associated with dens evaginatus(DE).This paper presents a case of a separated root tip formation associated with a fractured tubercle of *** SUMMARY An 11-year-old boy was referred for gingival sinus on the buccal side of the right mandibular second premolar(tooth#45).Clinically,tooth#45 was free of caries,but there was a sign of a fractured tubercle of DE on the occlusal *** showed that the root canal of tooth#45 was widely radiolucent.A separated root apex was found apically under the main root and was nearly completely formed with an apical orifice at the apical ***#45 was diagnosed as tubular fracture of DE with chronic apical periodontitis.A revascularization technique was recommended to treat the *** 3-mo and 1-yr follow-up,the patient remained *** radiography revealed that the separated root tip distally drifted with closure of the ***,the root length and thickness of the main root did not *** Clinicians should be aware that even if tubercle of DE is fractured in an immature tooth,the root tip may be separated from the main root and completely formed.