Faculty of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Prog Orthod. 2022 May 16;23(1):17. doi: 10.1186/s40510-022-00409-4.
This study aimed to assess the distribution of non-carious cervical lesions (NCCLs) by tooth type, investigate the prevalence of NCCLs in patients undergoing orthodontic treatment, and identify the possible associated factors.
A total of 160 patients were enrolled in this retrospective study. Data on the following variables were collected from pre-and post-orthodontic treatment records: age, sex, Angle's malocclusion, facial pattern, number of activation sessions, compensatory treatment, and retreatment. Frontal, right and left lateral intraoral photographs of each patient were evaluated to identify the presence or absence of NCCLs in each tooth and assess the distribution of NCCLs in the 3840 teeth from the enrolled patients. Furthermore, patients were classified as NCCLs present, irrespective of the number of NCCLs on the teeth or NCCL absent. Bivariate and multivariate Poisson regression analyses with robust variance were used to assess the association between the NCCLs and each independent variable. Prevalence ratio and 95% confidence intervals were calculated and p < 0.05 was considered statistically significant.
The prevalence of NCCLs before and after orthodontic treatment was 22.71% and 30.91%, respectively. Premolars were the most affected teeth, followed by the first molars, canines, and incisors. After statistical analysis, age was found to be the variable factor that influenced the prevalence ratio, with NCCL being the most prevalent when orthodontic treatment was performed in adulthood.
Premolars were most commonly affected by NCCLs. Furthermore, age seemed to contribute to the increased prevalence of NCCLs in adults undergoing orthodontic treatment.
本研究旨在评估非龋性颈（NCCL）病变的分布情况，并研究接受正畸治疗患者中 NCCL 的患病率，以及识别可能的相关因素。
本回顾性研究共纳入 160 名患者。从正畸治疗前后的记录中收集以下变量的数据：年龄、性别、安氏错合类型、面型、激活次数、补偿治疗和再治疗。对每位患者的正位、右侧和左侧口内照片进行评估，以确定每个牙齿是否存在 NCCL，并评估纳入患者的 3840 颗牙齿中 NCCL 的分布情况。此外，将患者分为存在 NCCL 和不存在 NCCL，无论牙齿上存在的 NCCL 数量如何。采用具有稳健方差的双变量和多变量泊松回归分析来评估 NCCL 与每个独立变量之间的关联。计算了患病率比和 95%置信区间，p<0.05 为统计学显著。
正畸治疗前后 NCCL 的患病率分别为 22.71%和 30.91%。前磨牙是最易受影响的牙齿，其次是第一磨牙、尖牙和切牙。经过统计学分析，年龄是影响患病率比的变量因素，正畸治疗在成年期进行时，NCCL 最为普遍。
前磨牙最易受 NCCL 影响。此外，年龄似乎是成年人正畸治疗中 NCCL 患病率增加的原因之一。
