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Continued development of the root separated from the main root

Authors
 Il-Young Jung  ;  Eui-Seong Kim  ;  Chan-Young Lee  ;  Seung Jong Lee 
Citation
 JOURNAL OF ENDODONTICS, Vol.37(5) : 711-714, 2011 
Journal Title
JOURNAL OF ENDODONTICS
ISSN
 0099-2399 
Issue Date
2011
MeSH
Adolescent ; Apexification/methods ; Bicuspid/pathology ; Calcium Hydroxide/therapeutic use ; Child ; Dental Fistula/therapy ; Dental Pulp Necrosis/therapy ; Female ; Follow-Up Studies ; Humans ; Methylmethacrylates/therapeutic use ; Odontogenesis/physiology* ; Periapical Periodontitis/therapy ; Root Canal Filling Materials/therapeutic use ; Root Canal Preparation/methods ; Silicones/therapeutic use ; Tooth Apex/growth & development* ; Tooth Root/growth & development* ; Zinc Oxide-Eugenol Cement/therapeutic use
Keywords
Immature teeth ; open apex ; revascularization ; separated root
Abstract
INTRODUCTION: Endodontic infection or physical trauma of a developing tooth might lead to unusual situation for root development.

METHODS: Two cases are presented. Both cases involved immature mandibular second premolars with infected pulps. In the first case, the tooth was treated by apexification, whereas revascularization procedures were performed in the second case. Interestingly, a separated root tip was observed with the main root at the initial presentation of case 2.

RESULTS: At recall after apexification, a separate root tip was observed apically to the main root end, and root development continued in case 1. In the second case, the separate root displayed continuing root formation, but the main root did not gain root thickness or length.

CONCLUSIONS: These cases revealed that Hertwig's epithelial root sheath and stem cells from the apical papilla can be separated from the main tooth structure by an external force or iatrogenic factors and thereafter produce a separate root tip.
Full Text
http://www.sciencedirect.com/science/article/pii/S0099239911000598
DOI
10.1016/j.joen.2011.01.015
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eui Seong(김의성) ORCID logo https://orcid.org/0000-0003-2126-4761
Lee, Seung Jong(이승종)
Lee, Chan Young(이찬영)
Jung, Il Young(정일영) ORCID logo https://orcid.org/0000-0001-8972-2664
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/93031
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