Becker W, Becker B E, Hujoel P
Department of Periodontology, University of Southern California School of Dentistry, Los Angeles, California, USA.
Compend Contin Educ Dent. 2000 Oct;21(10):805-8, 810-1, 814 passim; quiz 820.
Implant placement at the time of extraction has become an acceptable treatment option. The formation of a restorative treatment plan frequently requires the removal of questionable and hopeless teeth. This retrospective case series analysis reports the reasons for tooth removal before immediate implant placement and provides a rationale for removing questionable and hopeless teeth. Root length is also analyzed as related to tooth loss. Between September 1986 and December 1998, 460 teeth were removed from 282 patients. Reasons for removal were advanced periodontal disease, endodontic complications, nonrestorable caries, roots fractures, short roots (< 14 mm in length), root resorption, and loosened posts. Implants were placed at the time of extraction. Tallies, frequency distributions, and percentages were used to determine individual and multiple reasons for extraction. For teeth with short roots, computerized measurements were made from periapical x-rays. Advanced periodontal disease and restored endodontically treated teeth with posts were the primary reasons for tooth extraction. Dental implants replaced 305 maxillary and 155 mandibular teeth.
拔牙时同期植入种植体已成为一种可接受的治疗选择。制定修复治疗计划往往需要拔除可疑及无法保留的牙齿。本回顾性病例系列分析报告了即刻种植前拔牙的原因，并为拔除可疑及无法保留的牙齿提供了理论依据。还分析了牙根长度与牙齿缺失的关系。1986年9月至1998年12月期间，从282例患者中拔除了460颗牙齿。拔牙原因包括重度牙周病、牙髓并发症、无法修复的龋齿、牙根折断、短根（长度<14毫米）、牙根吸收和桩松动。拔牙时同期植入种植体。使用计数、频率分布和百分比来确定拔牙的单一及多种原因。对于短根牙齿，通过根尖X线片进行计算机测量。重度牙周病和根管治疗后有桩修复的牙齿是拔牙的主要原因。种植牙替代了305颗上颌牙和155颗下颌牙。
