evaluation of association between crown margins and materials with the periodontal health

ABSTRACT

The objective of this study was to evaluate the association between crown margin and type of restorative material on the periodontal health of the restored teeth. This case control study was conducted on 100 patients [50 metal crowns, 50 porcelain fused to metal crowns] whose prosthesis were fabricated in the department of crown and bridge of Fatima Jinnah Dental College Hospital. Contra-lateral tooth of same patient served as control. Clinical evaluation was performed and periodontal indices including Bleeding index, Plaque index, and Pocket depth measurement were recorded on a proforma. CPITN[Ash] "C"probe was used to record the readings. Data was analyzed with SPSS for windows using chi square test. One hundred patients with either porcelain fused to metal crown [n=50] or metal crown [n=50] with unrestored and healthy contralateral dentition were included in the study. Teeth restored with supra-gingival margins scored better for bleeding index, plaque index and pocket depth as compared to teeth restored with subgingival margins [p value<0.01]. The type of restorative material did not have an effect on recorded scores [p value>0.1]. Supragingival preparations for the crowns were better tolerated by the periodontium as compared to the subgingival preparations. There was no influence of type of restorative material on gingival health