Comparison Of Biological Stability, And Healthy Of Peri-Implant Tissues Of Different Ceramic Crown Materials Restoring A Single Implant. Prospective Clinical Study- 1 Year

Statement of Problem: Clinical studies about single implant-supported prostheses made of monolithic Zirconia, Zirconia reinforced lithium silicate crown, and hybrid ceramic crowns are still clinically lacking. Purpose: The purpose of this randomized clinical trial was to compare biological stability and the health of peri-implant tissues of different ceramic crown materials of a single implant. Material and Methods: A total of 27 participants received 27 implant supported single restorations. This study was carried out on twenty-seven systemically healthy patients who are missing mandibular first permanent molar motivated to replace the missing teeth with implant restorations. Periapical radiographs and C.B.C.T. scans of the implant site were taken for all patients before treatment to assess bone quality and quantity. Patients were divided into three groups to receive three different super structures; the crown restorations were fabricated from three different materials (monolithic Zirconia, Zirconia reinforced lithium silicate Polymer infiltrated glass ceramic). After delivery of the definitive restorations, Clinical and radiographic parameters (Modified plaque index, Modified bleeding index, peri-implant Probing depth, implant stability quotient, and marginal bone loss) were recorded for all patients at the time of prosthesis insertion and then after 6, 9 and 12 months.