Hedzelek Wieslaw, Gajdus Przemyslaw
Department of Prosthetic Dentistry, University of Medical Sciences of Poznan, Poland.
Int J Prosthodont. 2007 May-Jun;20(3):311-2.
The aim of this pilot study was to evaluate the mechanical strength of an acrylic resin palatal denture base reinforced with a mesh or bundle of glass fibers. Silicon and stone casts of an edentulous maxilla (Frasaco) were used to manufacture palatal denture bases (n = 20) using heat-polymerized acrylic resin (SR Triplex Hot). The denture bases were reinforced with either 1 or 3 layers of glass-fiber mesh (Stick Net) or with a bundle of unidirectional glass fibers (Stick). Denture bases without reinforcement served as the control group. Fracture tests were carried out on a universal testing machine to determine each material's mechanical strength. The highest mean fracture values of 919 N were obtained in samples with 3 layers of Stick Net, with mean values of 677 N in the control samples. The differences between these 2 groups were statistically significant (P < .05). The applied glass-fiber reinforcement increased the mechanical strength of the acrylic resin palatal denture bases.
这项初步研究的目的是评估用玻璃纤维网或玻璃纤维束增强的丙烯酸树脂腭部义齿基托的机械强度。使用无牙上颌的硅橡胶和石膏模型（Frasaco），采用热聚合丙烯酸树脂（SR Triplex Hot）制作腭部义齿基托（n = 20）。义齿基托用1层或3层玻璃纤维网（Stick Net）或一束单向玻璃纤维（Stick）进行增强。未增强的义齿基托作为对照组。在万能试验机上进行断裂试验以确定每种材料的机械强度。在具有3层Stick Net的样本中获得了最高平均断裂值919 N，对照组样本的平均值为677 N。这两组之间的差异具有统计学意义（P <.05）。应用的玻璃纤维增强材料提高了丙烯酸树脂腭部义齿基托的机械强度。
