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Influence of different processing techniques for prosthetic acrylic resins in the surface roughness parameters: a
Margarida Martins Quezada1, Carlos Miguel da Costa Gomes Fernandes2, Javier Montero Martín3
1Faculty of Dental Medicine, Centre for Interdisciplinary Research in Health (CIIS), Estrada da Circunvalação, Universidade Católica Portuguesa, Estrada da Circunvalação, Viseu, 3504 - 505, Portugal. s-mmquezada@ucp.pt.
CAD/CAM resins offer smoother surfaces than conventional methods for poly (methyl methacrylate) (PMMA). Heat-cured resins, however, provide more consistent surface finishing, impacting topography and tribological function.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Surface Engineering
Background:
- Poly (methyl methacrylate) (PMMA) processing techniques impact surface topography and tribological properties.
- Consistent surface quality is crucial for PMMA applications.
Purpose of the Study:
- To evaluate the influence of different processing techniques on the surface height distribution of PMMA.
- To compare surface characteristics of conventional and CAD/CAM acrylic resins.
Main Methods:
- Prepared samples of conventional and CAD/CAM acrylic resins.
- Extracted surface roughness parameters: arithmetic mean roughness (Pa), skewness (Psk), and kurtosis (Pku) from profilometric readings.
- Obtained profilometric profiles for detailed analysis.
Main Results:
- CAD/CAM resins exhibited significantly lower average roughness (Pa) compared to conventional techniques.
- Heat-cured resins showed the highest mean Pa but lower coefficient of variation (CV), indicating better surface consistency.
- Surface profiles displayed distinct skewness and kurtosis characteristics between resin types.
Conclusions:
- Processing method, chemical composition, and resin type significantly influence PMMA surface finishing.
- CAD/CAM resins provide superior arithmetic mean roughness (Pa).
- Heat-cured resins demonstrate better surface consistency.
