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| CATEGORY: ORIGINAL RESEARCH |
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| Year : 2020 | Volume
: 20
| Issue : 5 | Page : 19 |
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Comparative evaluation of tear strength and surface roughness of two maxillofacial silicone materials following disinfection: an invitro study
Rajat Lanzara
Indian Army
| Date of Web Publication | 8-Jan-2021 |
Correspondence Address:
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0972-4052.306366
How to cite this article:
Lanzara R. Comparative evaluation of tear strength and surface roughness of two maxillofacial silicone materials following disinfection: an invitro study. J Indian Prosthodont Soc 2020;20, Suppl S1:19 |
How to cite this URL:
Lanzara R. Comparative evaluation of tear strength and surface roughness of two maxillofacial silicone materials following disinfection: an invitro study. J Indian Prosthodont Soc [serial online] 2020 [cited 2021 Jan 28];20, Suppl S1:19. Available from: https://www.j-ips.org/text.asp?2020/20/5/19/306366 |
Introduction: Maxillofacial defects compromise form, function and aesthetics. Rehabilitation of theses defects can be done either surgically or by using prosthesis. Silicone is the material of choice and prosthetic results are largely limited by mechanical properties of material used.
Methodology: In this study maxillofacial silicone materials M 511, Technovent (5 Yorkpark, Bridgend, UK) and Copsil T, COP (France) were compared. 60 test specimens were prepared following guidelines of American Standard test Material (ASTM) D624 for type C tear test specimen. Test specimens were divided into two groups (A and B) which included 30 test specimens of each silicone material (M 511, Technovent and Copsil T, COP) respectively. Initially 30 test specimens, (15 test specimens of each silicone material respectively, A1 and B1) were evaluated for tear strength and surface roughness. While remaining 30 specimens (15 test specimens of each silicone material respectively, A2 and B2) were disinfected with 4 percent chlorhexidine gluconate for a period of 30 hours and then evaluated.
Result: The mean tear strength of M 511, Technovent (11.74 ± 1.01 N/mm) was significantly more than Copsil T – 30 TN, COP (10.41 ± 0.72 N/mm). The mean surface roughness of M 511, Technovent (826.26 ± 154.01 nm) was significantly less than Copsil T, COP (1297.00 ± 227.61nm) There was significant decrease in tear strength following disinfection while no significant difference was observed on the surface roughness.
Conclusion: A significant decrease in tear strength was observed following disinfection suggesting a need to reinforce maxillofacial silicone prosthetic material and no significant difference was observed on the surface roughness following disinfection suggesting 4 percent chlorhexidine as a safe disinfecting agent.
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