Bolhari Behnam, Pirmoazen Salma, Taftian Ensieh, Dehghan Somayeh
Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Assistant Professor, Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
J Dent (Tehran). 2016 Nov;13(6):448-452.
Trauma to primary teeth can lead to devastating sequels in development of permanent successors. The disturbance may range from enamel hypoplasia and/or hypo-calcification to arrest of dental bud development. Crown dilaceration of permanent teeth is one of the consequences of trauma to deciduous teeth mainly due to intrusion or avulsion. This report presents a mandibular central incisor with dilacerated crown and yellowish discoloration with symptomatic apical abscess. History revealed avulsion of primary mandibular central incisors. The purpose of this report is to present: 1. Reasons of dilacerated crown, yellowish discoloration and necrotic pulp in this case, 2. Treatment options in different types of crown dilacerations and also in this case. The tooth was successfully managed by nonsurgical root canal therapy and restoration with composite resin to restore esthetics. We emphasize that trauma to deciduous teeth should not be understated, and regular follow up is essential.
乳牙外伤可导致恒牙发育出现严重后果。这种干扰范围可从釉质发育不全和/或钙化不足到牙胚发育停滞。恒牙冠折是乳牙外伤的后果之一，主要是由于嵌入或脱出所致。本报告介绍了一例下颌中切牙，其牙冠折裂且呈淡黄色，伴有根尖脓肿症状。病史显示下颌乳中切牙曾脱出。本报告的目的是：1. 阐述该病例中牙冠折裂、淡黄色变色及牙髓坏死的原因；2. 介绍不同类型牙冠折裂的治疗选择以及本病例的治疗方法。通过非手术根管治疗和复合树脂修复成功保留了患牙并恢复了美观。我们强调乳牙外伤不应被忽视，定期随访至关重要。
