Mechanical Properties of Silver Nanoparticles Containing Tissue Conditioners

Abstract

Objective: The purpose of this study evaluates effects of the silver nanoparticles (AgNP) onmechanical properties of tissue conditioners.Materials and Methods: Various concentrations (10, 20, 30, 40, 50 and 60 ppm) of silvernanoparticles were incorporated into the tissue conditioners, and divided into seven groups (onecontrol group and six experimental groups; G1-G6). Seven concentrations out of ten trouser-legdesigned tissue conditioners were made for tensile tear force (TTF) test. Seventy pairs of acrylicresin bars were fabricated from stainless steel mold and spacer designed for tensile bond strength(TBS) test. The tissue conditioners with silver nanoparticles of seven concentrations out of ten eachwere packed into the spacers to bond each ends of acrylic resin bars. All specimens of two studieswere stored in water at 37 Celsius for 48 hours and thermocycled 1,000 times in water between5 and 55 Celsius. The specimens were tested by a universal testing machine (Shimadzu EZ test,AK5N) until the specimens were torn for tensile tear force test and de-bonded between two acrylicresin bars of tensile bond strength. Data were analyzed using a one-way ANOVA with Tukey’s HSDpost-hoc tests.Result: The results revealed increasing the concentrations of silver nanoparticles in G1-G6gave an TTF but not different from control group (p > 0.05). All silver nanoparticles containinggroups (TBS) had statistically significant higher bond strengths than the control groups (p < 0.05).Conclusion: This study indicated that silver nanoparticles do not affect the tensile tearforce of tissue conditioners while a low concentration of silver nanoparticles (G1-G6) have slightlyaffected the mechanical properties of tissue conditioners. Silver nanoparticles containing tissueconditioners appear to be a promising and innovative material for clinical uses.Keywords: Sliver nanoparticles, Tensile bond strength, Tensile tear force, Tissue conditionersว.ทันต.มศว ปีที่ 13 ฉบับที่ 2 พ.ศ. 2563 หน้า 11-21.SWU Dent J. 2020;13(2):11-21.