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• W2890881245 abstract "This in vitro study was conducted to comparatively evaluate the effects of surface modifications of PEEK abutments on the retention of implant supported provisional restorations luted with two different luting agents. A total of sixty PEEK implant abutments with dimension of 7mm height and 20 occlusal convergence and sixty implant analogs were used. Implant analogs were embedded in clear auto polymerizing resin blocks. The PEEK abutments were fastened to the respective Implant analogs and divided into six groups of ten samples each. In Groups I and IV, abutments with retentive grooves were used. In Groups II and V, abutments were milled with tungsten carbide bur and air abraded with 110 μm aluminum oxide and in Groups III and VI, abutments were milled with diamond abrasive.Wax patterns were made with inlay wax on the PEEK abutments and index were designed for the fabrication of acrylic copings. An additional three PEEK abutments were selected for surface analysis using scanning electron microscope (SEM) with each type of the above mentioned surfaces.The provisional restorations were fabricated with tooth colored auto polymerizing acrylic resin. They were then cemented onto the respective abutments with non eugenol zinc oxide cement in Groups I, II and III and polymeric implant cement in Groups IV, V and VI. The test samples with the provisional restorations were kept in artificial saliva for 24 hours for aging at room temperature to simulate the oral condition. The cemented test samples were tested for tensile bond strength with a universal testing machine and the basic values were recorded for all the six test groups. The result were subjected for statistical analysis.On comparative evaluation of the effect of three different surface modifications, the PEEK implant abutments modified with diamond abrasive exhibited statistically significantly highest tensile bond strength when the provisional restorations were luted with non eugenol zinc oxide cement. However PEEK implant abutments modified with tungsten carbide bur and PEEK implant abutments with retentive grooves exhibited statistically equal bond strength values to each other but lesser than that of PEEK abutments modified with diamond abrasive.On comparative evaluation of the effect of three different surface modifications, the PEEK implant abutments modified with diamond abrasive exhibited statistically significantly higher tensile bond strength values equivalent to the values exhibited by PEEK abutments modified with retentive grooves, when the provisional restorations were luted with polymeric implant cement. However PEEK implant abutments modified with tungsten carbide bur exhibited statistically lesser tensile bond strength values. On comparison of the two different cements used in the study, the polymeric implant cement exhibited a statistically significantly higher tensile bond strength values with all the three surface modifications of PEEK abutments compared to the non-eugenol zinc oxide cement.On comparative evaluation of the effect of three different surface modifications on PEEK implant abutments on the retention of implant supported provisional restorations luted with two different luting agents, namely non eugenol zinc oxide cement and polymeric implant cement, the diamond abrasive surface modifications of PEEK abutments exhibited statistically significantly highest tensile bond strength. These results are in correlation with the SEM analysis of surface modified PEEK abutments.A fixed provisional implant restorations provides the most esthetic, stable and desirable result for the patient. The newly designed PEEK provisional abutments provide a lower cost option for fixed restoration. This abutment was cost effective and can be easily modified. It supports a transitional prosthesis that is delivered at the time of implant placement to achieve acceptable esthetics, function, and most importantly it maintains the patients self esteem and self confidence. Further studies are required to investigate the mechanical resistance of PEEK abutments and marginal leakage under clinical loading conditions." @default.
• W2890881245 created "2018-09-27" @default.
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• W2890881245 date "2011-04-01" @default.
• W2890881245 modified "2023-09-27" @default.
• W2890881245 title "Comparative Evaluation of the Effect of Surface Modifications of “PEEK” Abutments on the Retention of Implant Supported Provisional Restorations Luted with Two Different Luting Agents" @default.
• W2890881245 hasPublicationYear "2011" @default.
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