Kutralanathan Abinaya, Chidambaranathan Ahila Singaravel, Balasubramaniam Muthukumar
Department of Prosthodontics and Crown and Bridge, SRM Dental College, Bharathi Salai, Ramapuram, Chennai, Tamil Nadu, India.
Front Dent. 2025 Feb 4;22:5. doi: 10.18502/fid.v22i5.17838. eCollection 2025.
This study evaluated the effect of ozone water disinfection on dimensional stability and accuracy of silicone impression materials. According to ISO-4823, a stainless-steel die was fabricated for this in vitro study. Three horizontal parallel lines, namely x, y, and z (25, 50, and 75µm in width and 25mm in length) running perpendicular to two vertical lines, namely D1 and D2 (0.075±0.008mm wide), were created on the superior surface of the die. Group A served as the control group with no disinfection. Disinfection was performed with 2% glutaraldehyde in group B, 5.25% sodium hypochlorite in group C, and ozone water in group D for 10 minutes. Totally, 60 samples were fabricated. The silicone impression samples were allowed to polymerize in a thermostatically controlled water bath at 35±1ºC for 10 minutes. The dimensional stability and accuracy of the silicone impression samples were evaluated by using a video measuring microscope and an optical microscope. Data were analyzed by two-way ANOVA followed by post-hoc analysis with the Scheffe test (alpha=0.05). The highest dimensional stability (25.01mm) and accuracy (25.02µm) were seen in addition silicone putty and light body impression with ozone water disinfection, and the lowest parameters were seen in condensation silicon putty and light body disinfected with 2% glutaraldehyde (24.87mm and 24.88 µm, respectively); this difference was statistically significant (P<0.001). Ozone water disinfection caused minimal changes in dimensional stability and accuracy when compared to 2% glutaraldehyde and 5.25% sodium hypochlorite disinfection.
本研究评估了臭氧水消毒对硅橡胶印模材料尺寸稳定性和精度的影响。根据ISO - 4823标准，为该体外研究制作了一个不锈钢模具。在模具的上表面制作了三条水平平行线，即x、y和z（宽度分别为25、50和75μm，长度为25mm），它们垂直于两条垂直线，即D1和D2（宽度为0.075±0.008mm）。A组作为未进行消毒的对照组。B组用2%戊二醛消毒，C组用5.25%次氯酸钠消毒，D组用臭氧水消毒10分钟。总共制作了60个样本。硅橡胶印模样本在35±1ºC的恒温水浴中聚合10分钟。使用视频测量显微镜和光学显微镜评估硅橡胶印模样本的尺寸稳定性和精度。数据采用双向方差分析，随后用Scheffe检验进行事后分析（α = 0.05）。臭氧水消毒的加成型硅橡胶腻子和轻质体印模的尺寸稳定性最高（25.01mm），精度最高（25.02μm），而用2%戊二醛消毒的缩合型硅橡胶腻子和轻质体的尺寸稳定性和精度最低（分别为24.87mm和24.88μm）；这种差异具有统计学意义（P < 0.001）。与2%戊二醛和5.25%次氯酸钠消毒相比，臭氧水消毒对尺寸稳定性和精度的影响最小。
