Aim:The purpose of this study was to compare the candida adherence to injection molding acrylic resin, the poly ether ether ketone (PEEK) material and to the conventional acrylic resin.
Materials and methods:The study was conducted in-vitro and in-vivo including 3 groups, conventional acrylic resin group, injection molding acrylic resin and the PEEK groups. The invitro study included 60 discs (10×10×2 mm), 20 discs for each group, Candida albicans ATCC-10231was cultured and Candida adherence was evaluated by colony count method. The in-vivo study included 30 participants with maxillary partial dentures, 10 participants for each group, wearing their dentures for at least 3 months. The swabs were obtained from denture fitting surfaces and cultured to investigate Candida adherence by colony count method.Results: Both in-vitro and in-vivo results showed the highest Candida adherence in case of conventional acrylic resin material (330±35×10 8 cfu) in-vitro and (287.53 ±68.53 square root / cfu) in-vivo. It was significantly decreased in case of injection molding resin (226±15 ×10 8 cfu) in-vitro and (221.89 ±44.31 square root/cfu) in-vivo, while PEEK showed no Candida adherence in-vitro and in-vivo.Conclusions: PEEK material has been shown to be bio-inert, and when combined with injection moulding resin, it provides a more biocompatible alternative to acrylic resin.
Background Nowadays implant-retained overdentures retained by bar attachment are used on a wide scale as a substitute for the conventional complete denture thus further studies are required to verify this replacement.Methodology Fourteen completely edentulous patients were randomly categorized into two equal groups. In the control group (Group I) patients received implant-retained overdentures retained by bar attachment with retentive plastic clips, while in the test group (Group II) patients received implant-retained overdentures retained by bar attachment with retentive clips made of Poly Ether Ketone Ketone (PEKK) material. All the patients were scheduled for recall visits and probing depth was recorded at the time of loading, six months, and twelve months.Results: Regarding probing depth: (Group I) was significantly higher than (Group II) after 6 and 12 months. Data were coded and entered using the statistical package for the Social Sciences (SPSS) version 28 (IBM Corp., Armonk, NY, USA). Data were summarized using mean and standard deviation. Comparisons between groups were done using an unpaired t-test. Comparison over time within the same group was done using paired t-test. P-values less than 0.05 were considered statistically significant.
Conclusion:Within the limitations of this study, Implant retained overdentures retained by bar attachment with plastic retentive clip material are less recommended than implant-retained overdentures retained by bar attachment with PEKK retentive clip material.
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