Schmitd Ligia Buloto, Assao Agnes, Ramalho-Ferreira Gabriel, Faverani Leonardo Perez, Oliveira Denise Tostes
*Department of Stomatology, Pathology Division, Bauru School of Dentistry †Department of Oral and Maxillofacial Surgery, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru ‡Department of Surgery and Integrated Clinic, Araçatuba Dental School, São Paulo State University, Araçatuba, Brazil.
J Craniofac Surg. 2017 Mar;28(2):482-483. doi: 10.1097/SCS.0000000000003322.
Bilaterally mandibular and maxillary fourth molars, concomitant to hypodontia, are uncommon. These dental anomalies, called hypohyperdontia, are rare and etiology is not well defined. Several complications may occur as a consequence of supernumerary teeth, such as teeth impaction, resorption of adjacent teeth, and development of cysts and tumors. The authors present an uncommon occurrence of three-fourth molars concomitant to hypodontia and dentigerous cyst associated with impacted mandibular second and third molars in a nonsyndromic patient. The authors attempt to discuss the occurrence of bilaterally fourth molars and reinforce the importance of clinical approach, considering risks and benefits for the patient.
双侧下颌和上颌第四磨牙伴牙缺失并不常见。这些被称为牙发育异常的牙齿异常情况较为罕见，病因尚不明确。多生牙可能会引发多种并发症，比如牙齿阻生、邻牙吸收以及囊肿和肿瘤的形成。本文作者报告了一例非综合征患者出现三颗第四磨牙伴牙缺失以及与下颌第二和第三磨牙阻生相关的含牙囊肿的罕见病例。作者试图讨论双侧第四磨牙的发生情况，并强调临床处理的重要性，同时考虑对患者的风险和益处。
