Effect Of Three Different PFM Materials On The Expression Of AST And ALP In GCF

Objective: To investigate the changes of gingival crevicular fluid(GCF) volume and amount of aspartate transaminase(AST) and alkaline phosphatase(ALP) in GCF during different materials porcelain-fused-to-metal(PFM) crowns restoration. The relationship between the amount of AST, ALP and the health of periodontal tissue was discussed and the effect of different inner crown materials on periodontal tissue was explored.Methods: The anterior teeth of 26 patients by random were conceived the restoration of Ni-Cr alloy PFM, Ti alloy PFM and Au-Pt alloy PFM. Under the circumstances of strictly limiting crown axial contour , margin adaptation and periodontal conditions , the margin of crowns, a total of 30 teeth were selected. They were divided into 3 groups, of which per group were 10 teeth. GCF was collected from labial and lingual of mesial site and distal site before the tooth preparation by filter paper. At the point of 1 month and 3 months after cementation, GCF was collected at the same sites. At the same time, clinical observation indexes were recorded. Before preparation, the volume of GCF and the amount of AST and ALP were regarded as the baseline. The amount of AST and ALP were detected by automated chemical analyzer, and analyzed the variation between the pre-restoration and post-restoration. Results:1. Compared to pre-restoration , the clinical observation indexes , the volume of GCF, the amount of AST and ALP in GCF have no conspicuous difference in...