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ORIGINAL ARTICLE
Year : 2020  |  Volume : 10  |  Issue : 3  |  Page : 105-110

Comparison of tensile and tear strength of three silicone materials for maxillofacial prosthesis in Indian climatic condition


Department of Prosthodontics and Crown and Bridge, Faculty of Dental Sciences, Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India

Correspondence Address:
Dr. Anoop Sharma
Department of Prosthodontics and Crown and Bridge, Faculty of Dental Sciences, Ramaiah University of Applied Sciences, Bengaluru - 560 054, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jid.jid_41_20

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Aims: The aim of the study was to evaluate and compare physical properties such as tensile strength and tear strength of three commonly used silicone maxillofacial materials in Indian climatic condition. Settings and Design: An in vitro study was conducted to compare the tensile and tear strength using a universal testing machine with 100 N load at a speed of 20 mm/min. Specimens were prepared from three commercially available silicones, i.e., medical grade silicone (control group), prosthetic grade silicone (test Group 1), and a locally available medical grade silicone (test Group 2). One-way analysis of variance was carried out to test any significant difference between the mean values of tensile and tear strength between the tested materials. Post hoc test of Tukey was used to find which of the two groups' means shows a significant difference. Results: Prosthetic grade silicone showed the highest tensile strength with a P< 0.001* among the two tested materials. Tear strength and mean elongation was highest in control showing statistically significant results (<0.001*). Locally available medical grade silicone showed the least favorable properties among all the tested materials, though tensile strength was within acceptable range. Conclusions: Tensile strength of prosthetic silicone was highest followed by medical grade, whereas tear strength and elongation were maximum in medical grade silicone. Locally available medical grade silicone showed the least favorable properties.


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