Normah Yacob, Raja Azman Awang, Mohd Zulkarnain Sinor

Objective: This study focuses on investigating the influence of the interproximal contact area and width on periodontal parameters. Materials and Methods: A total of 30 periodontitis subjects were involved in the study, and 661 teeth were selected for analysis. Periodontal parameters such as plaque score, gingiva score, clinical probing depth and radiographic bone level were recorded for each tooth. Upper and lower impressions were taken for construction of study models which were used for the measurement of interproximal contact area and width. simple linear regression (SLR) and multiple linear regressions (MLR) analysis were used to evaluate the relationship between periodontal parameters and interproximal dimension. Results: The SLR analyses consistently showed that the interproximal contact area and width were both significantly related with plaque score, gingiva score and bone level, and MLR analyses confirmed that both the interproximal contact area and width were significant predictors for each plaque score, gingiva score and bone level model. Conclusion: Within the limitation of the study, we can conclude that the interproximal contact area and width have a significant relationship with the presence of dental biofilm, gingival bleeding and bone level in the subjects susceptible to periodontal disease.