Rohani Kimia, Eslamian Ladan, Nahvi Golnaz
MSc Student, Division of Oral Health and Society, Faculty of Dentistry, McGill University, Montreal, Canada.
Professor of Orthodontics, Dentofacial Deformities Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dent Res J (Isfahan). 2021 Apr 6;18:27. eCollection 2021.
Association of cuspid impaction with adjacent lateral incisor anomalies is under controversy. The aim of this study was to investigate the correlation between maxillary cuspid impaction with dental anomalies.
In this experimental study, the material consisted of pretreatment dental records of 102 patients with at least one palatally or buccally displaced impacted permanent cuspid (palatal and buccal impaction groups). They were matched with a comparison control group of 102 patients having normally erupted maxillary cuspids. Available space, mesiodistal dimensions of teeth, and morphologic parameters of lateral incisors were measured using the digital caliper. Comparison of mean values of lateral incisors anomalies and severity of crowding between different groups were performed using the one-way ANOVA test, and the analysis of associations between position of the impaction and anomaly of the lateral incisors and severity of crowding was performed using the Chi-square test. < 0.05 was considered statistically significant.
There was no statistically significant difference in the arch length-tooth size discrepancy between the cuspid impaction groups and control group. The impaction group (buccal or palatal) presented statistically significant differences in terms of anomalies of maxillary lateral incisor compared to the control group. Peg-shaped lateral incisor was related to buccal cuspid impaction and microdontia had relationship with palatal cuspid impaction.
There is the relationship between cuspid impaction and adjacent lateral incisor abnormality, but no difference was observed between buccal and palatal cuspid impactions. Crowding revealed no relationship with cuspid impaction (buccal or palatal) in this study.
尖牙阻生与相邻侧切牙异常之间的关联存在争议。本研究的目的是调查上颌尖牙阻生与牙齿异常之间的相关性。
在这项实验研究中，材料包括102例至少有一颗腭侧或颊侧移位阻生恒牙尖牙患者（腭侧和颊侧阻生组）的治疗前牙科记录。他们与102例上颌尖牙正常萌出的患者组成的对照比较组相匹配。使用数字卡尺测量可用间隙、牙齿的近远中尺寸以及侧切牙的形态参数。使用单向方差分析测试比较不同组之间侧切牙异常的平均值和拥挤程度，并使用卡方检验分析阻生位置与侧切牙异常及拥挤程度之间的关联。P < 0.05被认为具有统计学意义。
尖牙阻生组与对照组之间的牙弓长度 - 牙齿大小差异无统计学意义。与对照组相比，阻生组（颊侧或腭侧）在上颌侧切牙异常方面存在统计学意义的差异。钉状侧切牙与颊侧尖牙阻生有关，而过小牙与腭侧尖牙阻生有关。
尖牙阻生与相邻侧切牙异常之间存在关联，但颊侧和腭侧尖牙阻生之间未观察到差异。在本研究中，拥挤与尖牙阻生（颊侧或腭侧）无关。
