Aesthetically, however, components such as the clasps in RPD frameworks are easily exposed, resulting in an unpleasant aesthetic appearance. Additionally, cobalt–chromium (Co-Cr) alloys are currently the standard materials used in RPD frameworks because of their excellent mechanical properties and well-documented scientific results. The denture base resin is mainly composed of polymethyl methacrylate (PMMA), while the choice of artificial teeth will depend on the clinical situation (e.g., ceramic, composite resin, etc.). The main components of RPD include the denture base resin, artificial teeth, and framework. RPD treatments are non-invasive treatments to reduce the physical and mental burden, to rehabilitate oral function, and to improve psychological and social adaptability for geriatric patients. Hence, complete denture treatment in geriatric patients has dropped and the need for removable partial denture (RPD) treatments has increased. Moreover, as with increasing oral health awareness, the rate of edentulism has rapidly decreased in the past few decades, with tooth loss occurring later in life. Additionally, considering health, anatomical, and economic aspects, there are restrictions in applying dental implants to geriatric patients. However, dental implants are invasive treatments that can cause physical and psychological burdens to the elderly. Dental implantology is one of the most eye-catching therapeutic approaches in dentistry nowadays, which not only meets aesthetic considerations but expands the applicability of various types of dental prostheses. With the importance of aesthetics in contemporary society, aesthetic rehabilitation is gradually increasing. Dental prostheses are extremely important for geriatric patients and can help maintain somatic function or lead to psychological adaptation. If a patient does not have a dental prosthesis, this will further cause the facial contours to collapse and aging characteristics to become apparent. Along with aging and tooth loss, the bones and soft tissues gradually atrophy. The results imply that PAEKs are potential alternative materials for the removable of prosthetic frameworks.ĭental prostheses are of great significance in maintaining the facial contours and aesthetics of geriatric patients. Bonding performance is essential for denture materials, and our results demonstrated that PAEKs possess good resistance to thermal cycling fatigue, which is an advantage in clinical applications. Moreover, PAEKs showed significantly lower SBS reductions ( p < 0.05) after thermal cycling fatigue testing compared to Co-Cr and zirconia.
CYCLING EFFECTS WITH PEEK MATERIAL ISO
The SBS values of PAEKs (7.60–8.38 MPa) met the clinical requirements suggested by ISO 10477 (5 MPa). PAEKs showed lower surface roughness values (0.02–0.03 MPa) than Co-Cr (0.16 MPa) and zirconia (0.22 MPa) after priming and sandblasting treatments ( p < 0.05). The surface characteristics of testing materials after different surface pretreatments showed obvious differences. The obtained data were analyzed using a paired samples t-test and Tukey’s honestly significant difference (HSD) test (α = 0.05). The shear bond strength (SBS) values were determined after thermal cycles. The surface morphologies were observed using a scanning electron microscope and the surface roughness was measured using atomic force microscopy. Testing materials were pretreated by grinding, sandblasting, and priming prior to polymerization with the denture acrylic.
This study aims to analyze the bonding performance of PAEKs to a denture acrylic. Poly(aryl–ether–ketone) materials (PAEKs) are gaining interest in everyday dental practices because of their natural properties.
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