背景:乙烯基聚醚有机硅(VPES)是由乙烯基聚硅氧烷(VPS)和聚醚(PE)的组合制成的新型印模生物材料。因此,在各种消毒剂测试条件下评估其特性和行为非常重要。本研究旨在评估新型VPES印模材料在标准消毒剂中浸泡不同时间间隔后的尺寸稳定性。
方法:使用的弹性印模材料-中等身体常规组(单相)[Exa\'lenceGCAmerica]。使用不锈钢模具和环(ADA规格19)制造总共84个样品。将这些样品分配到对照组(n=12)和测试组(n=72)中。试验组分为3组,根据使用的消毒剂类型-A组-2%戊二醛,B-0组。基于每个样品浸入消毒剂的时间间隔,将每个测试组的5%次氯酸钠和C-2%氯己定进一步分为2个亚组(n=12/亚组)-亚组-1-10分钟和亚组-30分钟。印模材料设置后,将其从环中取出,然后在水中洗涤15秒。立即在立体显微镜上进行对照组测量,并将其他样品浸入三种消毒溶液中10分钟和30分钟,以通过使用立体显微镜在X40放大倍数下测量由不锈钢模具在样品上产生的线之间的距离来检查尺寸稳定性。
结果:在对照组中测得的距离为4397.2078µm和4396.1571µm;对于测试组,A-2%戊二醛为4396.4075µm和4394.5992µm;B-0组。5%次氯酸钠为4394.5453µm和4389.4711µm组-C-2%氯己定分别为4395.2953µm和4387.1703µm,持续10分钟和30分钟。对于所有组10分钟和30分钟,尺寸变化百分比在0.02-0.25的范围内。
结论:2%戊二醛在尺寸稳定性方面是最适合用于VPES弹性印模材料的消毒剂,并且与2%氯己定和0.5%次氯酸钠相比显示最小的尺寸变化。
BACKGROUND: Vinyl polyether silicone (VPES) is a novel impression biomaterial made of a combination of vinyl polysiloxane (VPS) and polyether (PE). Thus, it is significant to assess its properties and behaviour under varied disinfectant test conditions. This study aimed to assess the dimensional stability of novel VPES impression material after immersion in standard disinfectants for different time intervals.
METHODS: Elastomeric impression material used -medium body regular set (Monophase) [Exa\'lence GC America]. A total of 84 Specimens were fabricated using stainless steel die and ring (ADA specification 19). These samples were distributed into a control group (n=12) and a test group (n=72). The test group was divided into 3 groups, based on the type of disinfectant used - Group-A- 2%
Glutaraldehyde, Group-B- 0. 5% Sodium hypochlorite and Group-C- 2% Chlorhexidine each test group was further divided into 2 subgroups (n=12/subgroup) based on time intervals for which each sample was immersed in the disinfectants - subgroup-1- 10 mins and Subgroup 2- 30 mins. After the impression material was set, it was removed from the ring and then it was washed in water for 15 seconds. Control group measurements were made immediately on a stereomicroscope and other samples were immersed in the three disinfection solutions for 10 mins and 30 mins to check the dimensional stability by measuring the distance between the lines generated by the stainless steel die on the samples using a stereomicroscope at x40 magnification.
RESULTS: The distance measured in the control group was 4397.2078 µm and 4396.1571 µm; for the test group Group-A- 2%
Glutaraldehyde was 4396.4075 µm and 4394.5992 µm; Group-B- 0. 5% Sodium hypochlorite was 4394.5453 µm and 4389.4711 µm Group-C- 2% Chlorhexidine was 4395.2953 µm and 4387.1703 µm respectively for 10 mins and 30 mins. Percentage dimensional change was in the range of 0.02 - 0.25 for all the groups for 10 mins and 30 mins.
CONCLUSIONS: 2 %
Glutaraldehyde is the most suitable disinfectant for VPES elastomeric impression material in terms of dimensional stability and shows minimum dimensional changes as compared to that of 2% Chlorhexidine and 0.5% Sodium hypochlorite.