Clinical effect of massive defect of the posterior teeth restored with three material onlays

CHEN Qin-chao

doi:10.3969/j.issn.1672-2973.2018.02.010

Abstract：Objective:To compare the therapeutic effect of three different material onlays on the restoration of the massive defect of the posterior teeth.Method:Seventy-six patients were treated with 100 onlays for the restoration of massive defect of the posterior teeth.Primary root canal treatment was performed and onlays were fabricated with IPS e.max.CAD ceramics,composite resin and gold alloy alternatively.All restorations were evaluated at one year,two years,three years after placement.The clinical effects of three groups were compared according to the modified USPHS.Result:The three groups had no difference in marginal adaption,interproximal relations,periodontal reaction as well as marginal discoloration.In restoration integrity and the abrasion of opposite teeth,composite resin onlays and gold alloy onlays were better than IPS e.max.CAD ceramic onlays while composite resin onlays and IPS e.max.CAD ceramic onlays are obviously better than gold alloy onlays in color match.Conclusion:Good marginal adaptation as well as interproximal relations could be reached by the three different material onlays on the restoration of the masssive defect of the posterior teeth,which decreased the occurrence of periodontal disease and secondary caries.Thanking to their excellent fracture resistance and good apperance,onlay restorations fabricated with composite resin can be a good option for the restoration of the massive defect of the posterior teeth.However,the long-term reaction ofresoration was left to be studied in the future.