Objective:To compare the clinical efficacy of screw-retained zirconia ceramic restorations and metal-ceramic restorations supported by implants.Methods:Patients who visited the Implant Center of Beijing Stomatological Hospital affiliated with Capital Medical University from January 2011 to September 2016 were followed up,and were grouped according to the materials of the restorations:zirconia-ceramic and metal-porcelain.The survival rates of the implants and restorations,the occurrence rates of biological and mechanical complications were recorded and compared between the two groups.Results:A total of 77 patients,91 restorations,and 233 implants were included.There was no statistically significant difference between the two groups in terms of survival rates,biological and mechanical complications(P＞0.05).The most common mechanical complications in both groups were chipping and loosening of the restorations.Conclusion:The clinical efficacy of the two different material restorations is basically consistent.Implant-supported screw-retained zirconia ceramic restorations can achieve safe and predictable longterm clinical effects.
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