Nomaan Nasir, Yawar Hayat, Sarah Ali, Ulfat Bash.
Gingival health effects of crown margin location.
Professional Med J Jan ;19(1):123-8.

Objectives: The location of crown margins is very important for the health of periodontal tissues. This study was designed to evaluate the gingival health of teeth before and six months after tooth crowning. Design: Cross sectional study. Setting: Islamic International Dental Hospital. Period: March 2010 to June 2011. Method: 50 patients were selected from the out patient department. Who were advised crowns for replacement of lost tooth structure and data was collected before and six months after crown insertion. Papillary Bleeding Index (PBI) was used to evaluate periodontal health. All recorded data was entered in computer and was statistically analyzed using SPSS version 17 data analyzer and comparisons were performed using chi square test. Results: Results showed that patients inserted with crowns had signs of periodontal disease. ( p value = 0.03). Conclusions: It may be concluded from the study that sub gingival crown margins have detrimental effect on gingival health.

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