Abstract
ABSTRACT Objective : To evaluate the surface roughness of two makes of autopolymerized acrylic resin (Classic Dencor® and Duralay®) with two different methods of finishing and polishing (conventional and using the Dhpro® finishing & polishing kit). Methods : A total of 20 specimens (10 of each make) was obtained using Zetalabor®--Zhermak condensation silicone molds. After polymerization, 20 blocks of resin were divided in two and subjected to two types of finishing and polishing, one at each end. The types of finishing and polishing were as follows: conventional (lathe) and using the Dhpro® finishing & polishing kit. Once finished and polished, the specimens were subjected to surface roughness testing using a roughness meter and were analyzed via the Student’s t-test. Results : There is a statistically significant difference between the forms of polishing, unrelated to the brand of acrylic resin. Conventional polishing achieved a level of 0.12 µm for both resins and the DhPro® polishing presented roughness a little above 0.2 µm. Conclusion : Conventional polishing is superior to the DhPro® kit, as it achieves lower levels of roughness. There is no significant difference between the acrylic resins in terms of surface roughness after the finishing and polishing processes.
Highlights
Acrylic resin is one of the most widely used dental materials for fabricating dental prostheses[1]
Conventional polishing achieved a level of 0.12 μm for both resins and the DhPro® polishing presented roughness a little above 0.2 μm
The transitional phase is of great importance to prosthetic treatment as it deals with the simulation of the definitive prosthesis[2]
Summary
Acrylic resin is one of the most widely used dental materials for fabricating dental prostheses[1]. The transitional phase is of great importance to prosthetic treatment as it deals with the simulation of the definitive prosthesis[2] This material is composed of a liquid-powder system in which the powder is composed of methyl polymethacrylate (polymer) and the liquid is composed of methyl methacrylate (monomer). The polymerized acrylic resin structure has a number of free monomers between 3% and 5% in the autopolymerizing version and 0.1% in the heat-polymerizing form[1]. The presence of these free monomers has an impact on surface roughness and complicates the resin finishing and polishing process
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
