Abstract
New materials for overdenture base construction were evolved. Thus, more clinical trials are needed to validate these materials. This study was aimed to compare the difference between CAD/CAM milled Poly methyl methacrylate (PMMA), Poly Ether Ether Keton (PEEK), and conventional mandibular implant assisted overdentures regarding patient satisfaction and oral health-related quality of life (OHRQL). This randomized, crossover, clinical study included 18 completely edentulous subjects rehabilitated with three mandibular implant-assisted overdentures with three different denture base materials opposing a maxillary single denture. These materials were: CAD/CAM milled PMMA, CAD/CAM milled PEEK, and conventional PMMA. Every participant first received each mandibular overdenture in a random manner. After six months of each overdenture use, patient satisfaction and oral health-related quality of life were assessed using Visual Analog Scale (VAS) and Oral Health Impact Profile (OHIP-EDENT-19) respectively, then cross-over to other groups was done. The same was repeated to the last group. Comparison of VAS and OHIP-EDENT-19 between groups were done using Kruskal Wallis test followed by Bonferroni test. Regarding all the VAS items, there were statistically significant higher scores for CAD/CAM Milled PMMA, and PEEK than conventional PMMA base except for speech, esthetic, smell. Regarding OHIP-EDENT-19, many items revealed statistically lower problems scores for CAD/CAM milled PMMA, and CAD/CAM milled PEEK than conventional PMMA base except psychological discomfort, psychological disability and social disability. Within the limit of this study, CAD/CAM milled PMMA, and CAD/CAM milled PEEK were recommended as implant-assisted overdenture bases as it revealed higher patient satisfaction and better oral health-related quality of life in comparison to conventional PMMA implant- assisted overdenture.
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