Yazd Journal of Dental Research

Introduction: The external margins of restorations involve appropriate places for plaque accumulation which assist in the creation or exacerbation of periodontal disorders. Since there are different materials and techniques for restorations, the present study aimed to determine the effect of restorative materials in correct class II restorations on the gingival health in patients referring to Shahid Sadoughi Dental School of Yazd in 2013. Methods: In this study, 60 patients were selected via convenient sampling and classified into two groups of class II restored with amalgam and composite. Four surfaces of each tooth were examined and gingival status indices, plaque, bleeding on probing and the depth of probing were applied to check the periodontal status. In order to compare the two groups statically, SPSS software (ver.16) was utilized via applying non-parametric Man-Whitney test due to the ordinal nature of the variables. Results: The study results demonstrated that the mean score of MGI, PI, BI and PDI indices were more in the composite restored teeth. The difference was statically significant in the level of 0.05 (P.value= 0.001). Although the mean score of PDI index was a little more in the group of composite restored teeth, there was no statically significant difference between the two groups (P.value=0.470). Conclusion: The findings revealed that even correctly restored teeth have a role in causing periodontal diseases, though in this case the negative impact of composite material seems to be more than amalgam.