移位下颌尖牙的研究。
Investigation of transmigrated mandibular canines.
作者信息
Azeem Muhammad, Afzal Ambreen, Ahmed Zubair, Ali Munawar Manzoor, Haq Arfan Ul, Hamid Waheed Ul
机构信息
De'Montmorency College of Dentistry, Department of Orthodontics (Lahore, Pakistan).
Altamash Institute of Dental Medicine, Department of Orthodontics (Karachi, Pakistan).
出版信息
Dental Press J Orthod. 2019 Nov-Dec;24(6):65-68. doi: 10.1590/2177-6709.24.6.065-068.oar.
INTRODUCTION
Canine transmigration is a rare orthodontic condition and it is relevant to perform the proper diagnose at an early age.
OBJECTIVE
The aim of the current study was to find out the frequency of transmigrated mandibular canines (TRC) in orthodontic patients obtained from South Asian population of Pakistan origin.
METHODS
Panoramic radiographs of 2,550 untreated orthodontic patients (1,248 males; 1,302 females) were included, to investigate the presence, site, and type of TRC. Any permanent mandibular canine that was found to be crossing the midline in panoramic radiographs was considered as TRC.
RESULTS
The frequency of TRC was found to be 0.98%. TRC were only found unilaterally. No significance regarding gender and side was found. Nineteen TRC displayed a type 1 transmigratory pattern, while type 2 and type 5 transmigratory patterns were encountered in three patients.
CONCLUSION
Frequency of transmigrated mandibular canines in the studied sample was 0.98%.
引言
犬牙异位萌出是一种罕见的正畸病症，在早期进行正确诊断具有重要意义。
目的
本研究旨在确定源自巴基斯坦的南亚人群正畸患者中下颌犬牙异位萌出（TRC）的发生率。
方法
纳入2550名未经治疗的正畸患者（男性1248名；女性1302名）的全景X线片，以调查TRC的存在情况、位置和类型。在全景X线片中发现任何越过中线的恒牙下颌犬牙均被视为TRC。
结果
发现TRC的发生率为0.98%。TRC仅单侧出现。未发现性别和左右侧之间存在显著差异。19颗TRC表现为1型异位萌出模式，而3名患者出现了2型和5型异位萌出模式。
结论
在研究样本中，下颌犬牙异位萌出的发生率为0.98%。
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