PDF(Pubmed)
Abstract：
A protostylid is a relatively rare dental developmental aberration characterized as an extra cusp located on the mesial half of the buccal surface of the molars. A protostylid is rarely to be reported due to its low rate of occurrence. This case report describes a patient referred for endodontic treatment due to the presence of a protostylid on the buccal surface of the maxillary first molar that induced apical periodontitis.
A 53-year-old female reported a 3-month history of pain of chewing with her upper left posterior teeth over 3 months. In the clinical examination, an abraded anomalous cusp-like structure was found on the buccal surface of tooth 26, Cone beam computed tomography (CBCT) revealed a supernumerary cusp with an intact root canal inside, which was fused with the mesiobuccal (MB) root canal in the middle of the root. In addition, extensive periapical radiolucency was observed around tooth 26. The tooth was diagnosed as apical periodontitis, and endodontic treatment was performed. The initial lesion in tooth 26 gradually healed over 1 year of observation.
To our knowledge, this case is the first to describe the endodontic management of a maxillary first molar with a protostylid and advances our understanding of supernumerary cusps. This case provides a reference for the treatment of protostylid.
A 53-year-old female reported a 3-month history of pain of chewing with her upper left posterior teeth over 3 months. In the clinical examination, an abraded anomalous cusp-like structure was found on the buccal surface of tooth 26, Cone beam computed tomography (CBCT) revealed a supernumerary cusp with an intact root canal inside, which was fused with the mesiobuccal (MB) root canal in the middle of the root. In addition, extensive periapical radiolucency was observed around tooth 26. The tooth was diagnosed as apical periodontitis, and endodontic treatment was performed. The initial lesion in tooth 26 gradually healed over 1 year of observation.
To our knowledge, this case is the first to describe the endodontic management of a maxillary first molar with a protostylid and advances our understanding of supernumerary cusps. This case provides a reference for the treatment of protostylid.
摘要：
背景：原茎盖是一种相对罕见的牙齿发育异常，其特征是位于磨牙颊表面内侧一半的额外牙尖。由于其发生率低，因此很少报道原茎盖。此病例报告描述了由于上颌第一磨牙的颊表面存在原茎盖而导致根尖牙周炎的患者，因此需要进行牙髓治疗。
方法：一名53岁的女性报告了3个月的咀嚼疼痛史，她的左上后牙超过3个月。在临床检查中，在牙齿26的颊表面发现了一个磨损的异常牙尖状结构，锥形束计算机断层扫描（CBCT）显示了一个多余的牙尖，内部有完整的根管，与根中部的近颊（MB）根管融合。此外,在26号牙齿周围观察到广泛的根尖周射线不透性。牙齿被诊断为根尖周炎，并进行牙髓治疗。经过1年的观察，牙齿26的初始病变逐渐愈合。
结论：据我们所知，该病例是第一个描述带有原茎盖的上颌第一磨牙的牙髓治疗方法，并增进了我们对多余尖端的理解。该病例为原茎的治疗提供了参考。
方法：一名53岁的女性报告了3个月的咀嚼疼痛史，她的左上后牙超过3个月。在临床检查中，在牙齿26的颊表面发现了一个磨损的异常牙尖状结构，锥形束计算机断层扫描（CBCT）显示了一个多余的牙尖，内部有完整的根管，与根中部的近颊（MB）根管融合。此外,在26号牙齿周围观察到广泛的根尖周射线不透性。牙齿被诊断为根尖周炎，并进行牙髓治疗。经过1年的观察，牙齿26的初始病变逐渐愈合。
结论：据我们所知，该病例是第一个描述带有原茎盖的上颌第一磨牙的牙髓治疗方法，并增进了我们对多余尖端的理解。该病例为原茎的治疗提供了参考。
