Carvalho Cristiane F, Vanderlei Aleska D, Marocho Susana M Salazar, Pereira Sarina M B, Nogueira Lafayette, Paes-Júnior Tarcisio J Arruda
Department of Dental Materials and Prosthodontics, São Paulo State University, São José dos Campos, Brazil.
Acta Odontol Latinoam. 2012;25(3):255-60.
The aim of this study was to evaluate the hardness, roughness and mass loss of an acrylic denture base resin after in vitro exposure to four disinfectant solutions. Forty specimens (Clássico, Brazil) were prepared and randomly assigned to 4 groups n = 10) according to the disinfectant solution: G1: control, stored in distilled water at 37 degrees C; G2: 1% sodium hypochlorite; G3: 2% glutaraldehyde; G4: 4% chlorhexidine. G2 to G4 were immersed for 60 minutes in the disinfectant solution. Measurements were carried out both before and after immersion in the solution. The surface was analyzed with a surface roughness tester (Surfcorder SE 1700 KOZAKALAB), a microdurometer FM-700 (Future Tech) and a scanning electron microscope (DSM 962-ZEISS). Loss of mass was determined with a digital weighing scale. After disinfection procedures, values were analyzed statistically. The acrylic denture base resin may be vulnerable to surface changes after in vitro immersion in the disinfectant solutions studied.
本研究的目的是评估一种丙烯酸义齿基托树脂在体外暴露于四种消毒剂溶液后的硬度、粗糙度和质量损失。制备了40个样本（巴西Clássico），并根据消毒剂溶液将其随机分为4组（n = 10）：G1：对照组，在37℃的蒸馏水中储存；G2：1%次氯酸钠；G3：2%戊二醛；G4：4%氯己定。将G2至G4在消毒剂溶液中浸泡60分钟。在溶液浸泡前后均进行测量。使用表面粗糙度测试仪（Surfcorder SE 1700 KOZAKALAB）、微型硬度计FM - 700（Future Tech）和扫描电子显微镜（DSM 962 - ZEISS）对表面进行分析。用数字秤测定质量损失。消毒程序后，对数值进行统计学分析。所研究的丙烯酸义齿基托树脂在体外浸泡于消毒剂溶液后可能易发生表面变化。
