Three studies have been conducted concerning OXIS contacts. The following tables summarise the findings of the studies carried out in Puducherry, Ajman and South Korea.

References
1. Muthu MS, Kirthiga M, Lee JC, Kayalvizhi G, Mathur VP, Kandaswamy D, Jayakumar N. OXIS Contacts as a Risk Factor for Approximal Caries: A Retrospective Cohort Study. Pediatr Dent. 2021;43(4):296-300.
2. Kirthiga M, Muthu MS, Lee JJC, Kayalvizhi G, Mathur VP, Song JS, Shin K, Praveen R. Prevalence and correlation of OXIS contacts using Cone Beam Computed Tomography (CBCT) images and photographs. Int J Paediatr Dent. 2021;31(4):520-527.
3. Walia T, Kirthiga M, Brigi C, Muthu MS, Odeh R, Pakash Mathur V, Rodrigues S. Interproximal contact areas of primary molars based on OXIS classification - a two centre cross sectional study. Wellcome Open Res. 2021 Feb 3;5:285.