This study aimed to evaluate the clinical effect of crown margin position and crown material on the periodontal health. 200 patients were examined, half of the patients received all ceramic crowns and the rest received porcelain fused to metal crowns. Contra-lateral tooth of same patient served as control. Teeth restored with supragingival margins scored better bleeding index, plaque index and probing pocket depth index as compared to teeth restored with subgingival margins and there was no difference between all ceramic and porcelain fused to metal crowns on periodontal health. KEY WORDS: Crown margins, periodontal and gingival health, PFM, All ceramic