Mosharraf Ramin, Ziaei Farzad, Abbasi Mahsa
Professor, Dental Materials Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Graduate, Dental Students, Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
J Dent (Tehran). 2018 Sep;15(5):325-331.
Pressure transmission under denture bases can vary depending on the denture tooth material. The aim of the present study was to evaluate pressure transmission under denture bases using denture teeth of different materials in direct and indirect tooth contacts.
In this in-vitro study, the pressure transmission generated by five types of denture teeth, including ceramic, nanocomposite, composite-acrylic resin, cross-linked acrylic resin, and polymethyl methacrylate (PMMA), under direct and indirect pressures was evaluated (n=10). The maximum pressure (MPa) was measured using a strain gauge. Data were statistically analyzed with one-way analysis of variance (ANOVA; α=0.05).
The denture tooth material had a significant effect on pressure transmission under denture bases (P<0.001). Under direct load, ceramic and PMMA teeth exhibited the maximum and minimum pressures, respectively, contrary to indirect load (P<0.001).
Pressure transmission under denture bases significantly varies with the use of different denture tooth materials. Acrylic teeth could be the most favorable choice to reduce the pressure beneath denture bases. Nanocomposite and acrylic resin-composite teeth may be used as alternatives.
义齿基托下的压力传递可能因义齿牙齿材料而异。本研究的目的是使用不同材料的义齿牙齿，在直接和间接牙齿接触的情况下，评估义齿基托下的压力传递。
在这项体外研究中，评估了五种类型的义齿牙齿（包括陶瓷、纳米复合材料、复合丙烯酸树脂、交联丙烯酸树脂和聚甲基丙烯酸甲酯（PMMA））在直接和间接压力下产生的压力传递（n = 10）。使用应变仪测量最大压力（MPa）。数据采用单因素方差分析进行统计学分析（α = 0.05）。
义齿牙齿材料对义齿基托下的压力传递有显著影响（P < 0.001）。在直接负载下，陶瓷牙齿和PMMA牙齿分别表现出最大和最小压力，与间接负载情况相反（P < 0.001）。
义齿基托下的压力传递会因使用不同的义齿牙齿材料而显著变化。丙烯酸牙齿可能是降低义齿基托下方压力的最有利选择。纳米复合材料牙齿和丙烯酸树脂复合牙齿可以作为替代选择。
