Abstract
Background: The High Performance Polymer is a based polymer biomaterial that was introduced as dental material to manufacture dentures superstructure and dental implants abutments. However, its surface characteristics and stress state still need to be properly described. The aim of this study was to compare the surface characteristics of a High Performance Polymer (Bio-HPP, Bredent, Senden, Germany) for computer-aided design and computer-aided manufacturing (CAD/CAM) milling and a Zirconia (Zirkonzahn, Steger, Ahrntal, Italy). Methods: The abutments surface roughness (Ra) was evaluated for each abutment material (N = 12) using a confocal laser microscope. Data were evaluated using One-Way ANOVA and Tukey tests (p < 0.05). In addition, a finite element analysis software was used to present stress measurement data as stress maps with 100 N loading. Results were generated according to Von-mises stress criteria and stress peaks were recorded from each structure. Results: Results showed a mean Ra of 0.221 ± 0.09 μm for Bio-HPP and 1.075 ± 0.24 μm for Zirconia. Both surface profiles presented a smooth characteristic regardless the measurement axis. The stress peaks from implant fixture and screw were not affected by the abutment material, however the high performance polymer showed the highest stress magnitude for the abutment region. Conclusions: Comparing the present results with the literature it is suggested that the CAD/CAM High Performance Polymer abutments present an adequate surface roughness with acceptable values of stress.
Highlights
Licensee MDPI, Basel, Switzerland.The use of prosthetic abutments is an important part of implant treatments
One-Way ANOVA revealed significant difference between the surface roughness according to the abutment material (F = 64.14, p < 0.01)
The present study considered the cement layer and the titanium base as part of the abutment, different from a fully PEEK structure as simulated in the reported study [58]
Summary
The use of prosthetic abutments is an important part of implant treatments. Standard stock titanium abutments were the only option available for the dentists [1]. Various materials could be used for fabrication of individually customized prosthetic abutments, such as metals, ceramics, hybrid materials [2] and composites [3]. The titanium is the most used material due to its mechanical characteristics as strength and resistance to distortion. Systematic reviews have shown excellent results published maps and institutional affil-
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