Does apical root resection in endodontic microsurgery jeopardize the prosthodontic prognosis?
조신연, 김의성,
소속 상세정보
조신연 ( Cho Sin-Yeon ) - Yonsei University College of Dentistry Department of Conservative Dentistry and Oral Science Research Center
김의성 ( Kim Eui-Seong ) - Yonsei University College of Dentistry Department of Conservative Dentistry and Oral Science Research Center
KMID : 0362320130380020059
Abstract
Apical surgery cuts off the apical root and the crown-to-root ratio becomes unfavorable. Crown-to-root ratio has been applied to periodontally compromised teeth. Apical root resection is a different matter from periodontal bone loss. The purpose of this paper is to review the validity of crown-to-root ratio in the apically resected teeth. Most roots have conical shape and the root surface area of coronal part is wider than apical part of the same length. Therefore loss of alveolar bone support from apical resection is much less than its linear length.The maximum stress from mastication concentrates on the cervical area and the minimum stress was found on the apical 1/3 area. Therefore apical root resection is not so harmful as periodontal bone loss. Osteotomy for apical resection reduces longitudinal width of the buccal bone and increases the risk of endo-perio communication which leads to failure. Endodontic microsurgery is able to realize 0 degree or shallow bevel and precise length of root resection, and minimize the longitudinal width of osteotomy. The crown-to-root ratio is not valid in evaluating the prosthodontic prognosis of the apically resected teeth. Accurate execution of endodontic microsurgery to preserve the buccal bone is essential to avoid endo-perio communication.
키워드
Ante's law; Endodontic microsurgery; Prosthodontic prognosis; Stress distribution
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