Abstract
Aims: The study aimed to investigate the outcome of different concentrations (0.5%, 1%, 1.5%, 2% by weight ) of zirconium oxide (ZrO2) nanoparticle on tear strength of room temperature vulcanized maxillofacial silicone material. Materials and methods: A total of (50) samples were prepared following the manufacture instruction and divided into five groups (n=10). The group A (control group) without nanoparticle, group B (0.5% ZrO2), group C (1% ZrO2), group D (1.5% ZrO2), group E (2% ZrO2). The tear strength samples were measured by a universal testing machine. Result: there was a highly significant difference between the groups' mean values. The control group (21.91 N/mm) showed non-significant difference with both 0.5% ZrO2 group (22.46 N/mm) and 2% ZrO2 (23.22 N/mm), but a highly significant difference with groups 1% ZrO2 (25.37 N/mm) and 1.5% ZrO2 (27.44 N/mm). Whereas the 0.5% ZrO2 group showed a highly significant difference with both groups (1% and 1.5% ZrO2),but no significant difference with 2% ZrO2 group. 1% ZrO2 group showed a significant difference with 1.5% ZrO2 group and a highly significant difference with 2% ZrO2 group. But group 1.5 % ZrO2 has a highly significant difference with group 2% ZrO2. Conclusion: Incorporation of ZrO2 nanoparticle at 1% and 1.5% by weight enhanced the tear strength of the VST 50F RTV maxillofacial silicone material.
Highlights
The maxillofacial prosthesis is utilized for replacing the lost facial parts that have been missing since inherent anomalies, trauma, and tumors
The present study aims to assess the impact of Zirconium oxide nanoparticle incorporation on VST-50F RTV maxillofacial elastomers' tear strength property and complete a comparison amongst the different concentrations
The silicone mixture was poured slowly inside the plastic molds' shaped spaces, and the holes should be overfilled with the mix [15]; a few minutes were needed before placing the cover to allow entrapped air bubbles to reach the surface
Summary
The maxillofacial prosthesis is utilized for replacing the lost facial parts that have been missing since inherent anomalies, trauma, and tumors. Materials used to construct maxillofacial prosthesis must have particular ideal properties, such as good tensile strength, tear strength, flexibility, low water sorption, good color stability. It should be biocompatible [2]. The silicone material has some disadvantages due to its short lifetime, color instability, and silicone deterioration; for instance, it shows altered surface, ill-fitting boundaries due to insufficient tear strength These variations are in linear relation to the patient's precaution through usage and cleanliness, such as exposure to the disinfectant material besides environmental changes such as temperature instabilities, UV radiation, air pollution, and moisture [6]. The present study aims to assess the impact of Zirconium oxide nanoparticle incorporation on VST-50F RTV maxillofacial elastomers' tear strength property and complete a comparison amongst the different concentrations
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