Qutieshat Abubaker, Al Harthy Nutayla, Javanmardi Shahab, Singh Gurdeep, Chopra Viresh, Aouididi Rayhana, Al Hanashi Omar, Al Arabi Abdulghani
Department of Adult Restorative Dentistry, Oman Dental College, Muscat, Oman.
Department of Restorative Dentistry, Dundee Dental Hospital and School, University of Dundee, Dundee, Scotland, UK.
J Orthod Sci. 2023 Mar 18;12:13. doi: 10.4103/jos.jos_75_22. eCollection 2023.
To determine the prevalence of dilaceration in a sample of patients presenting for initial orthodontic care.
Examining radiographs from a random sample of orthopantomogram images was used to acquire the data. In all, 2,801 dental records were evaluated at Oman Dental College (ODC), Oman. A dental X-ray processing software was utilized to view the images. A tooth was classified as having a mesial/distal dilaceration if its long axis exhibited an angle of 90 degrees or greater. Dilacerated roots in the buccal/lingual direction were diagnosed by observing the appearance of a spherical opaque area with a dark shadow in its central region, projected by the apical foramen, which gave the root canal a "bull's-eye" appearance.
Dilacerations were found in 17.32% of the records examined. The maxillary second molars (22.71%) were the most commonly affected, followed by the mandibular third molars and mandibular lateral incisors (21.90% and 17.23%, respectively). The central incisors and canines were the least affected, with dilaceration affecting less than 0.2% of the teeth. The mandible was found to have more dilacerations than the maxilla (53.78% and 46.22%, respectively). 61.03% of dilacerations occurred in molars, 43.12% of which occurred in third molars.
Dilaceration is a notable dental anomaly that can affect any tooth, with some teeth being more affected than others. Dilaceration in maxillary second molars and mandibular lateral incisors is more common in the population of this study than in other populations reported in the literature. Recognizing the condition will allow for more effective orthodontic treatment.
确定前来接受初次正畸治疗的患者样本中牙根弯曲的患病率。
通过检查随机抽取的全景片影像来获取数据。在阿曼牙科学院（ODC），共评估了2801份牙科记录。使用牙科X射线处理软件查看影像。如果牙齿的长轴呈现90度或更大的角度，则该牙齿被分类为有近中/远中牙根弯曲。通过观察由根尖孔投射出的中央区域有暗影的球形不透明区域的外观来诊断颊侧/舌侧方向的牙根弯曲，这使得根管呈现出“靶心”外观。
在所检查的记录中，发现17.32%存在牙根弯曲。上颌第二磨牙（22.71%）是最常受影响的，其次是下颌第三磨牙和下颌侧切牙（分别为21.90%和17.23%）。中切牙和尖牙受影响最小，牙根弯曲影响的牙齿不到0.2%。发现下颌的牙根弯曲比上颌更多（分别为53.78%和46.22%）。61.03%的牙根弯曲发生在磨牙，其中43.12%发生在第三磨牙。
牙根弯曲是一种显著的牙齿异常情况，可影响任何牙齿，某些牙齿比其他牙齿受影响更严重。在本研究人群中，上颌第二磨牙和下颌侧切牙的牙根弯曲比文献中报道的其他人群更为常见。认识到这种情况将有助于进行更有效的正畸治疗。
