Ranjan Madhu, Chatterjee Ujjal, Gupta Arya, Pandey Souvir, Anand Rohit, Keshri Mritunjay
Department of Prosthodontics and Crown and Bridge, Hazaribag College of Dental Sciences and Hospital, Hazaribagh, Jharkhand, India.
Department of Prosthodontics and Crown and Bridge, Buddha Institute of Dental Sciences and Hospital, Patna, Bihar, India.
J Pharm Bioallied Sci. 2021 Nov;13(Suppl 2):S1003-S1006. doi: 10.4103/jpbs.jpbs_216_21. Epub 2021 Nov 10.
Acrylic denture base tends to fracture frequently during their service due to poor strength. The surface roughness of denture base is a critical property because denture base with rough surface will cause accumulation of food particles ,thereby leading plaque retention . Microbes such as candida albicans are seen inhabitating the surface.
Conventional heat cure denture base reins(DPI) and heat cure denture base resin with incorporation of 15wt% aluminium oxide was studied in two groups with 20 samples each. A mold of size 65 mm × 10 mm × 3 mm (ISO Standard) was obtained by investing brass rectangles. About forty specimens were prepared. Specimens were divided into two groups ( = 20) coded A and B. Group A was the control group ( = 20) without addition of aluminum oxide. Group B was the experimental group ( = 20) with addition of 15 wt % aluminum oxide. All the specimens were stored in distilled water for 14 days. The flexural strength was measured using a three-point bending test in a universal testing machine, and the surface roughness was measured using contact-type profilometer.
Incorporation of 15wt% aluminum oxide leads to a significant increase in flexural strength and surface roughness of conventional heat-cure denture base resin.
由于强度较差，丙烯酸义齿基托在使用过程中容易频繁断裂。义齿基托的表面粗糙度是一项关键特性，因为表面粗糙的义齿基托会导致食物颗粒堆积，进而导致菌斑滞留。可见白色念珠菌等微生物栖息在其表面。
对传统热固化义齿基托树脂（DPI）和添加了15wt%氧化铝的热固化义齿基托树脂进行了研究，分为两组，每组20个样本。通过包埋黄铜矩形获得尺寸为65mm×10mm×3mm（ISO标准）的模具。制备了约40个试样。试样分为两组（n = 20），编码为A和B。A组为对照组（n = 20），未添加氧化铝。B组为实验组（n = 20），添加了15wt%的氧化铝。所有试样在蒸馏水中储存14天。使用万能试验机通过三点弯曲试验测量弯曲强度，并使用接触式轮廓仪测量表面粗糙度。
添加15wt%的氧化铝可显著提高传统热固化义齿基托树脂的弯曲强度和表面粗糙度。
