未萌出恒尖牙的牙槽突-牙性黏连的诊断：恒尖牙未萌出原因之一。
Diagnosis of alveolodental ankylosis in unerupted canines: one of the answers to why the canine does not come.
机构信息
Universidade de São Paulo, Faculdade de Odontologia de Bauru (Bauru/SP, Brazil).
Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto (Ribeirão Preto/SP, Brazil).
出版信息
Dental Press J Orthod. 2020 Nov-Dec;25(6):19-25. doi: 10.1590/2177-6709.25.6.019-025.oin.
INTRODUCTION
Teeth frequently fail to erupt and situations arise that prevent the canines from reaching the occlusal plane.
OBJECTIVE
Discourse about the three situations in which the canine does not reach the occlusal plane, and remains unerupted; and at the same time, point how to make a safe diagnosis of alveolodental ankylosis - one of the three causes -, based on tomography.
CONCLUSIONS
Ankylosis occurs in impacted teeth by atrophy of the periodontal ligament, including the epithelial rests of Malassez. The tomographic signs of alveolodental ankylosis in unerupted canines are the interruption of hypodense periodontal space, discontinuity of the lamina dura and its continuity with the root surface, which gradually loses its regular shape.
简介
牙齿经常无法萌出，并且会出现一些情况导致犬齿无法到达咬合平面。
目的
论述三种情况下犬齿无法到达咬合平面且未萌出的情况，并同时指出如何基于断层扫描做出安全诊断牙槽骨牙粘连——三种原因之一。
结论
牙周韧带萎缩导致埋伏牙发生粘连，包括 Malassez 上皮根鞘。未萌出的犬齿牙槽骨牙粘连的断层扫描征象是低密度牙周间隙中断、硬骨板不连续及其与牙根表面连续性中断，其逐渐失去规则形状。
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