Walia Tarun, Kirthiga M, Brigi Carel, Muthu M S, Odeh Ruba, Pakash Mathur Vijay, Rodrigues Steven
Department of Clinical Sciences, Ajman University, Ajman, Ajman, 346, United Arab Emirates.
Centre for Early Childhood Caries Research, Department of Pediatric and Preventive Dentistry, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Chennai, Tamilnadu, 600116, India.
Wellcome Open Res. 2021 Feb 3;5:285. doi: 10.12688/wellcomeopenres.16424.2. eCollection 2020.
Contact areas in primary teeth are known to be broader, flatter and situated farther gingivally than permanent teeth. The purpose of this study was to assess the prevalence of OXIS contact areas between primary molars using die models of children from two different ethnic populations. The research question of the present study is "What is the prevalence OXIS contact areas of primary molars in the populations studied?". A cross-sectional study was planned in a representative sample of 200 caries-free contact areas among children aged 3-6 years in two centers, Ajman and Puducherry. Data collection was performed from sectional or full-arch die stone models. The contacts were assessed according to OXIS classification by a single calibrated examiner at Center 2. Prevalence was expressed as numbers and percentages. The Chi-square test was applied to determine the association of OXIS contacts across genders and arches. The prevalence of O, X, I, and S contacts were 19%, 22.5%, 53%, and 5.5% in Center 1 and 6%, 1.5%, 75.5%, and 17% in Center 2, respectively. Significant results (p=0.005) were obtained in Center 1 when inter-arch comparison was performed and between the centers with respect to type of contact. No significant difference was obtained with respect to gender and OXIS contact areas. The present study confirmed OXIS contacts in both the centers. The 'O' and 'X' types of contacts were observed more in Center 1, whereas 'I' and 'S' contacts were observed more in Center 2.
乳牙的接触区比恒牙更宽、更平，且位置更靠近牙龈。本研究的目的是使用来自两个不同种族儿童的模型评估乳牙磨牙间OXIS接触区的患病率。本研究的研究问题是“在研究人群中，乳牙磨牙OXIS接触区的患病率是多少？”。在阿治曼和本地治里两个中心，对200名3至6岁无龋接触区儿童的代表性样本进行了横断面研究。数据收集是从局部或全牙弓石膏模型进行的。在中心2由一名经过校准的单一检查者根据OXIS分类对接触情况进行评估。患病率以数字和百分比表示。应用卡方检验来确定OXIS接触在性别和牙弓之间的关联。在中心1，进行牙弓间比较时以及在两个中心之间就接触类型而言，均获得了显著结果（p = 0.005）。在性别和OXIS接触区方面未获得显著差异。本研究在两个中心均证实了OXIS接触。在中心1观察到更多的“O”型和“X”型接触，而在中心2观察到更多的“I”型和“S”型接触。
