Aarthi J, Muthu M S, Kirthiga M, Kailasam Vignesh
Department of Pedodontics and Preventive dentistry, Sree Balaji Dental College and Hospital, Pallikaranai, Chennai, Tamil Nadu, 600100, India.
Centre for Early Childhood Caries Research, Department of Pediatric and Preventive Dentistry, Sri Ramachandra Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamil Nadu, 600116, India.
Wellcome Open Res. 2022 Jun 10;7:130. doi: 10.12688/wellcomeopenres.17775.2. eCollection 2022.
A new classification called OXIS was proposed for categorising the interproximal contacts of primary molars, and its prevalence was established. The aim of this study was to establish the variations in interproximal contacts of primary canines and thereby modify the OXIS classification of primary molars to primary canines. Additionally, we aimed to estimate the applicability of modifications to primary anterior teeth. A retrospective study was conducted with sectional die models obtained from a previous study of 1,090 caries-free children. Two calibrated examiners evaluated a total of 4,674 contacts from the occlusal aspect. The contacts were scored according to the former OXIS classification, with two modifications incorporated to encompass the morphological differences and rotations of primary canines and other primary anterior teeth. The most prevalent contact was O (62.1%), followed by X (19.6%), I (12.6%), S type I (4.1%), and S type II (1.6%). Inter-arch comparison by means of the Chi-square test revealed significant differences for all types of contacts ( < .001). The interproximal contacts of canines were categorised as O, X, I, S I, and S II. The OXIS classification of primary molars was modified to befit the variations in primary canines. This study showed the presence of different types of contacts in primary canines. Identification of these contacts and their complexity has warranted a need for this to be studied as an inherent risk factor for caries risk assessment.
一种名为OXIS的新分类方法被提出来对乳磨牙的邻面接触进行分类，并确定了其患病率。本研究的目的是确定乳尖牙邻面接触的变异情况，从而将乳磨牙的OXIS分类修改应用于乳尖牙。此外，我们旨在评估这些修改对乳前牙的适用性。我们进行了一项回顾性研究，使用了从先前一项对1090名无龋儿童的研究中获得的分段模型。两名经过校准的检查者从咬合面评估了总共4674个接触点。这些接触点根据先前的OXIS分类进行评分，并纳入了两项修改，以涵盖乳尖牙和其他乳前牙的形态差异和旋转情况。最常见的接触类型是O（62.1%），其次是X（19.6%）、I（12.6%）、S I型（4.1%）和S II型（1.6%）。通过卡方检验进行的牙弓间比较显示，所有类型的接触均存在显著差异（<0.001）。尖牙的邻面接触被分类为O、X、I、S I和S II。乳磨牙的OXIS分类被修改以适应乳尖牙的变异情况。本研究表明乳尖牙存在不同类型的接触。识别这些接触及其复杂性使得有必要将其作为龋病风险评估的一个内在风险因素进行研究。
