الفهرس 
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Abstract
Periodontitis is characterized by an increased alveolar bone turnover with dominance of bone resorption over bone formation leading to alveolar bone loss and loss of attachment.
Osteocalcin is the major noncollagenous calcium-binding single chain protein of bone and dentin matrix and it is a bone marker whose concentration in circulation has been used as a reflector of bone turnover.
The present study was conducted to evaluate osteocalcin levels in healthy and diseased periodontium and to correlate the changes in its levels with the changes in the clinical and radiographic parameters before and after treatment.
Results revealed a positive correlation in the changes of osteocalcin levels in relation to probing depth, clinical attachment level, plaque index and gingival index and a negative correlation with the changes in bone density although these correlations were insignificant.