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双侧双生下颌第二前磨牙导致前磨牙磨牙化的罕见病例：一例报告。

An unusual occurrence of bilaterally geminated mandibular second premolars resulting in premolar molarization: A case report.

作者信息

Rajesh Ebenezar Av, Venkatesh A, Mary A Vinita, Mohan Ajit George

机构信息

SRM Dental College, SRM University, Chennai, Tamil Nadu, India.

Sree Balaji Dental College, Chennai, Tamil Nadu, India.

出版信息

J Conserv Dent. 2013 Nov;16(6):582-4. doi: 10.4103/0972-0707.120939.

DOI:10.4103/0972-0707.120939
PMID:24347900
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3842734/
Abstract

Gemination refers to an attempt by a single tooth bud to divide, with a resultant formation of either a large tooth with a bifid crown or two completely divided teeth throughout the crown and root. This report describes a rare case of bilateral gemination of permanent mandibular second premolar tooth giving rise to molarization of premolars. The mesiodistal width of these teeth is similar to mandibular molars, but the cervicoocclusal width is lesser than that of the molar tooth. This paper also discusses the potential orthodontic, periodontal, and endodontic complications of premolar molarization.

摘要

双生牙是指单个牙胚试图分裂，最终形成一个冠部有双裂的大牙或整个冠部和根部完全分开的两颗牙。本报告描述了一例罕见的双侧下颌第二前磨牙双生牙病例，导致前磨牙磨牙化。这些牙齿的近远中宽度与下颌磨牙相似，但颈缘至牙合面的宽度小于磨牙。本文还讨论了前磨牙磨牙化潜在的正畸、牙周和牙髓并发症。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eaab/3842734/b4475a7ce9f2/JCD-16-582-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eaab/3842734/38b3a90e2d0f/JCD-16-582-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eaab/3842734/b4475a7ce9f2/JCD-16-582-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eaab/3842734/38b3a90e2d0f/JCD-16-582-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eaab/3842734/b4475a7ce9f2/JCD-16-582-g002.jpg

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Endodontic and clinical considerations in the management of variable anatomy in mandibular premolars: a literature review.下颌前磨牙根管解剖变异管理中的牙髓病学及临床考量：一项文献综述

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An unusual case of talon cusp on geminated tooth.双生牙伴畸形中央尖的罕见病例。
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Primary double teeth. A retrospective clinical study of their morphological characteristics and associated anomalies.原发性双排牙。关于其形态特征及相关异常的回顾性临床研究。
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