Influence of Various Polishing Protocols on Polyether-EtherKetone Removable Partial Frameworks Fabricated By CAD / CAM (Scanning Electron Microscope Study)
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2019, Vol 18, Issue 2
Abstract
Purpose: This in vitro scanning electron microscope study was performed to evaluate the influence of various polishing protocols on polyether-ether-ketone removable partial frameworks surface topography that fabricated by CAD / CAM. Materials and Methods: an epoxy resin model represent maxillary class I Kennedy classification with remaining natural teeth extending from the first premolar on one side to the first premolar teeth on the other side were used in the study. First premolars and canines of epoxy resin model were prepared to receive full ceramo-metal crowns with mesial occlusal and cinglum rest seat, distal guiding planes, and first premolars mesio-buccal retentive undercuts of 0.50 mm depth. 3 specimens of themodified polyetheretherketoneRDP frameworks were fabricated by CAD/CAM techniques. According to polishing protocols the themodified polyetheretherketoneRDP frameworks were divided into three groups: Group I (control group): modified polyetheretherketoneRDP frameworks without polishing, Group II: modified polyetheretherketoneRDP frameworks was polished by using Abraso-Starglanz polishing system and Group III: modified polyetheretherketoneRDP frameworks was polished by using Acrypol polishing system. Surface changes between groups before and after polishing by different polishing protocols were evaluated by scanning electron micro-scope (SEM). Results: It was noted that (group I) showed the highest surface roughness while the lowest surface roughness and highly smooth surface was showed in (group II). By using Student’s t-test for comparing between groups, group II showed significance decrease in surface roughness compared to that in (group I) and group III where (p<0.001). Conclusions: Within the limitations of this study, it was concluded that: Polishing PEEK RPD framework with abraso-starglaz paste was the most effective and promising polishing technique in production of highly smooth surface than acrypol polishing paste. For the laboratory-based protocols, both abraso-starglaz and acrypol polishing pastes produce a significantly smoother PEEK surface than that of the non-polished PEEK.
Authors and Affiliations
Rajah Attayeb BDS, Mohamed Elgamal BDS, NohaElwaseefy BDS, Nesreen El Mekawy BDS
Keywords
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