Comparison of Prevalence of Oxis Contact in Primary Maxillary and Mandibular Teeth: A Retrospective Cohort Study
Sonal Gupta *
Department of Pediatric and Preventive Dentistry, Kanti Devi Dental College and Hospital, Uttar Pradesh, India.
Asmita Das
Department of Pediatric and Preventive Dentistry, Kanti Devi Dental College and Hospital, Uttar Pradesh, India.
Abhinandan Patra
Department of Pediatric and Preventive Dentistry, Kanti Devi Dental College and Hospital, Uttar Pradesh, India.
Antra Saket
Department of Pediatric and Preventive Dentistry, Kanti Devi Dental College and Hospital, Uttar Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
Aim: The purpose of the present study was to evaluate four different types of OXIS contact areas (open [O], point [X], straight [I], and curved [S]) in primary teeth using cone beam computed tomography (CBCT) among 3- to 9-year-old children.
Methods: A retrospective cohort study was performed using cone-beam computed tomography images of children, available from January 1, 2022, to July 31, 2023 in Mathura district showing the presence of caries-free contact area between primary right maxillary and mandibular 1st and 2nd molar. In this study, 65 selected contacts using OXIS criteria from the occluso-cervical and axial view at coronal level using CBCT.
Result: Based on the shapes observed, the results showed four distinct types of contact regions between the primary molars, namely, O type, X type, I type, and S type; hence, the suggested categorization is known as OXIS. I type was the most prevalent pattern in the maxilla (47.06%), while O type was the most prevalent pattern in the mandible (50%).
Conclusion: There are four types of intact interproximal contact areas between primary molars, which can be evaluated in three dimensions. These types are O, X, I and S. In maxilla, pattern was
I > O > X > S whereas in mandible pattern was O > X > I = S.
Keywords: OXIS contact, primary maxillary, mandibular teeth, retrospective cohort