Department of Prosthodontics and Crown and Bridge, Government College of Dentistry, Indore, Madhya Pradesh, India.
Department of Prosthodontics, Bhabha College Dental Science, Bhopal, Madhya Pradesh, India.
J Contemp Dent Pract. 2022 Apr 1;23(4):415-418.
The aim of this study was to evaluate the effect of glass and nylon fiber reinforcement on surface topography of polymethyl methacrylate (PMMA) denture resin after polishing.
Stainless steel dies were used for preparation of specimens and were divided into three groups of 30 specimens each. Group A: Control group, Group B: PMMA reinforced with glass fibers, Group C: PMMA reinforced with nylon fibers. All specimens were finished and polished by a single operator to eliminate any inadvertent bias and ensure a constant pressure when polishing. The surface roughness of all the acrylic samples was measured with the help of profilometer (SURFCOM 130A).
Glass-reinforced PMMA showed higher mean surface roughness (0.16817 µm) as compared to unreinforced PMMA (0.10203 µm). Nylon-reinforced PMMA showed lower mean surface roughness (Ra) of 0.09177 µm as compared to unreinforced PMMM (0.10203 µm). Glass-reinforced PMMA showed a higher mean surface roughness (Ra) of 0.16817 µm as compared to nylon PMMA (0.09177 µm).
Reinforcement with glass and nylon fibers affects the surface roughness of the PMMA resin, i.e., glass fibers increase the surface roughness of PMMA resin, whereas nylon fibers slightly decrease the surface roughness of PMMA resin. Hence, the use of nylon fiber may be justified to obtain a denture with increased fracture resistance, acceptable esthetic properties, and better denture hygiene and plaque accumulation.
Two important parameters are essential for ensuring the durability of a restorative material, which include surface roughness and color stability. Surface roughness may be the major cause of discomfort for the patient and it may be associated with complications by promoting the deposition of biofilm and microbial growth. The use of nylon fiber increases fracture resistance and provides acceptable esthetic properties and better denture hygiene and plaque accumulation.
本研究旨在评估玻璃纤维和尼龙纤维增强对聚甲基丙烯酸甲酯（PMMA）义齿树脂抛光后表面形貌的影响。
使用不锈钢模具制备试件，并将其分为 3 组，每组 30 个试件。A 组：对照组；B 组：玻璃纤维增强 PMMA；C 组：尼龙纤维增强 PMMA。所有试件均由同一位操作人员进行加工和抛光，以消除任何无意的偏差，并确保抛光时保持恒定的压力。借助轮廓仪（SURFCOM 130A）测量所有丙烯酸样本的表面粗糙度。
玻璃纤维增强 PMMA 的平均表面粗糙度（0.16817 µm）高于未增强 PMMA（0.10203 µm）。尼龙纤维增强 PMMA 的平均表面粗糙度（Ra）为 0.09177 µm，低于未增强 PMMA（0.10203 µm）。玻璃纤维增强 PMMA 的平均表面粗糙度（Ra）为 0.16817 µm，高于尼龙 PMMA（0.09177 µm）。
玻璃纤维和尼龙纤维的增强会影响 PMMA 树脂的表面粗糙度，即玻璃纤维会增加 PMMA 树脂的表面粗糙度，而尼龙纤维会略微降低 PMMA 树脂的表面粗糙度。因此，使用尼龙纤维可能有助于获得具有更高抗断裂性、可接受的美观性能以及更好的义齿卫生和菌斑积聚的义齿。
确保修复材料耐用性的两个重要参数是表面粗糙度和颜色稳定性。表面粗糙度可能是患者不适的主要原因，它可能通过促进生物膜的沉积和微生物生长而导致并发症。使用尼龙纤维可提高抗断裂性，并提供可接受的美观性能以及更好的义齿卫生和菌斑积聚。
