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融合还是双生？一颗罕见的下颌第二磨牙。

Fusion or gemination? An unusual mandibular second molar.

作者信息

Camargo Angela Jordão, Arita Emiko Saito, Watanabe Plauto Christopher Aranha

机构信息

Department of Stomatology, School of Dentistry, University of São Paulo, 2227 Lineu Prestes Avenue, 05508-000 São Paulo, SP, Brazil.

Department of Stomatology, Public Oral Health and Forensic Dentistry, Ribeirão Preto Dental School-University of São Paulo, Cafe Avenue, 14040-904 Ribeirão Preto, SP, Brazil.

出版信息

Int J Surg Case Rep. 2016;21:73-7. doi: 10.1016/j.ijscr.2015.12.010. Epub 2015 Dec 17.

DOI:10.1016/j.ijscr.2015.12.010
PMID:26945485
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4802131/
Abstract

Fusion and gemination is not an uncommon finding and affected most primary dentition and the permanent maxillary incisors. These changes can develop a series of complication. A 11-year-old male presented radiography finding: an unusual mandibular second molar. A well-documented case brings a challenge for radiologists classify between fusion and gemination. In conclusion, this alteration although common in other regions, there are no case in the literature involving "second and third" molar.

摘要

融合与双生并非罕见的表现，多见于大多数乳牙列及恒牙上颌切牙。这些变化可引发一系列并发症。一名11岁男性患者的影像学检查发现：一颗异常的下颌第二磨牙。一个记录详尽的病例给放射科医生在融合与双生之间进行分类带来了挑战。总之，这种改变虽在其他部位常见，但文献中尚无涉及“第二和第三”磨牙的病例。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/7023f048ff1f/gr9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/66f29b99146e/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/5e1f832edb74/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/f4528e15bed4/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/be6273e5e9ac/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/272c00104fe4/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/74bd77a4c97c/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/07d340e5779a/gr7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/ea5d18031a95/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/7023f048ff1f/gr9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/66f29b99146e/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/5e1f832edb74/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/f4528e15bed4/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/be6273e5e9ac/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/272c00104fe4/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/74bd77a4c97c/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/07d340e5779a/gr7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/ea5d18031a95/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c7d0/4802131/7023f048ff1f/gr9.jpg

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本文引用的文献

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Fused primary first mandibular macromolar with a unique relation to its permanent successors: A rare tooth anomaly.融合的原发性第一下颌大磨牙与其恒牙后继者存在独特关系：一种罕见的牙齿异常。
Eur J Dent. 2013 Apr;7(2):239-242. doi: 10.4103/1305-7456.110195.
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Dental anomalies in the primary dentition of Turkish children.
下颌第三磨牙双生的临床及影像学特征：一例报告及文献综述
Case Rep Dent. 2025 May 20;2025:8934034. doi: 10.1155/crid/8934034. eCollection 2025.
4
Gemination of an Erupted Mandibular Third Molar: A Short Presentation of an Exceptionally Rare Clinical Occurrence.萌出下颌第三磨牙双生：罕见临床病例简报
Eur J Dent. 2024 May;18(2):687-691. doi: 10.1055/s-0043-1772248. Epub 2023 Sep 20.
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Dental pathologies in lamniform and carcharhiniform sharks with comments on the classification and homology of double tooth pathologies in vertebrates.齿状和长尾鲨的齿病病理学，以及对脊椎动物双齿病理学分类和同源性的评论。
PeerJ. 2022 May 11;10:e12775. doi: 10.7717/peerj.12775. eCollection 2022.
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