Abstract:

To restore the extensive posterior defection with all-ceramic onlays made by CEREC3D CAD/CAM system and to explore their instant qualities and short-term assessment.Methods Twenty-four patients with extensive postenor tooth-defection were selected to accept the onlay restoration.All the 24 onlays were scanned and designed in CEREC3D  CAD/CAM system and milled out of feldspathic porcelain blocks,and cemented with composite luting agents.The restorations were recalled and assessed using the modified assessment standard of American Dental Association (ADA) after the operation.The patients were recalled after 3 months and received satisfaction survey.The contents of TNF-α and MMP-8 in gingival crevicular fluid were also checked and compared with  control group.Results None of  the 24 restoration failed during the observation period,the satisfaction rate was 100%.The satisfactory rate of the patients 3 months after operation was 100%.The contents of TNF-α and MMP-8 in gingival crevicular fluid was  close to those in control group,there was no statistical significance (P>0.05).Conclusion The feldspar onlays fabricated with CEREC3D chairside dental CAD/CAM system could gain good result in restoring extensive posterior defection.

Key words: CEREC3D, onlay, all-ceramic, tooth-defection