Madalena Isabela Ribeiro, Resende Heloisa Guimarães, Blancato Ariane Beatriz, de Menezes-Oliveira Maria Angélica Hueb, Baratto-Filho Flares, Santos Poliana Ferreira, Perin Camila Paiva, do Nascimento Thais Vilalba Paniagua Machado, Proff Peter, Kirschneck Christian, Lepri César Penazzo, Küchler Erika Calvano
Department of Biomaterials, University of Uberaba, Uberaba 38010-200, Brazil.
School of Dentistry, Presidente Tancredo de Almeida Neves University Center, São João del Rei 36307-251, Brazil.
Dent J (Basel). 2025 Jan 6;13(1):23. doi: 10.3390/dj13010023.
Dental agenesis is the congenital absence of at least one tooth and has been associated with several other developmental dental conditions, such as morphological dental alterations and Carabelli trait. This study sought to investigate whether third molar agenesis is associated with Carabelli traits in permanent molars. : This was a cross-sectional study that used a convenience sample obtained from the orthodontic records of German patients. Patients with syndromes, oral clefts, congenital alterations including dental agenesis (except agenesis of third molars), and severe cases of bruxism with a loss of tooth tissue were excluded. Teeth with cavitated lesions of dental caries, occlusal wear, restorations, and evident dental deformities were not included in the evaluation. The Carabelli trait was evaluated in the permanent maxillary molars. The Carabelli trait was classified according to its expression for each tooth as either absent, negative, and positive expressions. Third molar agenesis was evaluated only in patients older than 10 years old (based on when initial tooth formation should be visible in the panoramic radiographs). The two-sided Chi-squared test was used to investigate the association between the conditions, using an alpha of 5% ( < 0.05). : A total of 155 patients (74 females and 81 males) were investigated; 39 had third molar agenesis and 75 had the Carabelli trait. There was no statistical significance difference between patients with third molar agenesis and those with Carabelli traits in relation to sex ( > 0.05). The Carabelli trait was more common in first molars than in second molars. There was no statistical significant association between third molar agenesis and Carabelli traits ( > 0.05). : Third molar agenesis was not associated with the Carabelli trait in the permanent molars in this population.
牙齿发育不全是指至少一颗牙齿先天性缺失，并且与其他几种牙齿发育状况相关，如牙齿形态改变和卡氏尖。本研究旨在调查第三磨牙发育不全是否与恒牙中的卡氏尖有关。：这是一项横断面研究，使用了从德国患者正畸记录中获取的便利样本。患有综合征、口腔裂隙、包括牙齿发育不全（第三磨牙发育不全除外）在内的先天性改变以及伴有牙齿组织丧失的严重磨牙症病例被排除。有龋齿空洞病变、咬合磨损、修复体和明显牙齿畸形的牙齿不纳入评估。在恒牙上颌磨牙中评估卡氏尖。根据每颗牙齿的表达情况，将卡氏尖分为无、阴性和阳性表达。仅对10岁以上的患者评估第三磨牙发育不全（基于全景X线片中最初牙齿形成应可见的时间）。使用双侧卡方检验来研究这些情况之间的关联，显著性水平为5%（<0.05）。：总共调查了155名患者（74名女性和81名男性）；39人有第三磨牙发育不全，75人有卡氏尖。第三磨牙发育不全患者和有卡氏尖的患者在性别方面无统计学显著差异（>0.05）。卡氏尖在第一磨牙中比在第二磨牙中更常见。第三磨牙发育不全与卡氏尖之间无统计学显著关联（>0.05）。：在该人群的恒牙中，第三磨牙发育不全与卡氏尖无关。
