Basavarajappa Santhosh, Abdullah Alkheraif Abdul Aziz, Alhijji Saleh M, Matinlinna Jukka Pekka, Vallittu Pekka Kalevi
Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University.
Faculty of Dentistry, The University of Hong Kong, Dental Materials Science.
Dent Mater J. 2017 Nov 29;36(6):834-841. doi: 10.4012/dmj.2016-423. Epub 2017 Nov 3.
This laboratory study was assessing the nano-mechanical properties (NMP), surface roughness (S), and topographic changes caused by ethanol on the surface of heat-polymerized denture base polymers at different time past dough stage. Specimens of heat polymerizing acrylic resin (Interacryl Hot, Interdent, Celje, Slovenia) of size 10×10×3 mm were prepared, wet ground, and polished for uniform smoothness and treated with ethanol in concentrations of 40, 70, and 99.9% for 30, 60, and 120 s and statistical analysis was done. Some statistical significance for S were highest with 120 s exposure to 40% ethanol. NMP were the highest for specimens treated with 99.9% ethanol concentration for 120 s, on specimens prepared 30 min past the dough stage. This study suggested that heat-polymerized denture base polymers are prone for changes by ethanol which alters mechanical properties and surface topography. Dough time influenced the ethanol resistance.
这项实验室研究评估了在面团期过后不同时间，乙醇对热聚合义齿基托聚合物表面造成的纳米力学性能（NMP）、表面粗糙度（S）和形貌变化。制备了尺寸为10×10×3 mm的热聚合丙烯酸树脂（Interacryl Hot，Interdent，采列，斯洛文尼亚）试样，进行湿磨和抛光以获得均匀的光滑度，并用浓度为40%、70%和99.9%的乙醇处理30秒、60秒和120秒，然后进行统计分析。对于S，在暴露于40%乙醇120秒时具有一些最高的统计学显著性。对于在面团期过后30分钟制备的试样，在99.9%乙醇浓度下处理120秒的试样NMP最高。这项研究表明，热聚合义齿基托聚合物容易受到乙醇影响而发生变化，乙醇会改变其力学性能和表面形貌。面团期影响耐乙醇性。
