Effects of CAD/CAM pure titanium based PFM crown on ALP and TNF-α in gingival crevicular fluid

AIM: To detect the effects of CAD/CAM pure titanium based PFM crown on the periodontal tissue of the restored teeth.METHODS: Forty patients were randomly selected from the Department of Stomotology of the first hospital of Shijiazhuang city including 60 premolars with a large area destruction of crown.One group was restored with CAD/ CAM pure titanium based PFM crown combined with metal caryopivot and the other with CAD/ CAM Au-Pt bassed PFM.Before the teeth prepared and 8 months after the placement of the crown,the weight of GCF and the level of GCF-ALP and the concentration of TNF-α in gingival crevicular fluid were checked.The results were analyzed statisticly.RESULTS: Restoration marginal depth and goodness of fit were all consistent with clinical requirement.The two groups of the weight of GCF,the level of ALP and concentration of TNF-α in gingival crevicular fluid before and after operation had no significantly statistical difference(P0.05).CONCLUSION: Pure titanium based PFM crown is a economical restoration,and has no significantly negative influences on the gingival tissue health of the restored teeth in short term.