对丙烯酸和双丙烯酸树脂材料制成的玻璃纤维增强固定假体进行有限元研究评估

O. Petrikas, Dmitriy Trapeznikov, Igor Kostin, Vitaliy Bulanov
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引用次数: 0

摘要

使用临时修复体是现代牙科实践的必经阶段。大多数专家都认识到临时牙桥的问题在于,在咬合压力较大的情况下使用临时牙桥可能会发生断裂。开发一种不需要特殊设备就能在临床就诊时加固临时修复体的简单方法,是一项紧迫的科学和实践任务。研究目的本研究的目的是根据不同的丙烯酸树脂和双丙烯酸树脂,评估玻璃纤维加固和非加固短跨度和长跨度临时牙桥的应力分布。研究方法。为此,开发了四个有限元模型,以再现修复材料和硬质牙体组织的特性(杨氏模量、泊松比、硬度)。每个模型均承受 100 牛顿的垂直荷载,荷载施加在牙桥中部。计算在 APM 3D Studio 中进行,所得结果在 Ansys 12.2 中进行监控。所得结果显示在显示器屏幕上,并进行打印和分析。结果。丙烯酸无加固短跨度桥(模型 1)的应力分布图显示,咬合面区域的应力最大(4.2-5.2 n/mm2)。丙烯酸树脂非加固大跨度桥体(模型 2)的应力分布图显示,负荷区和面向缺损的连接体颈区的应力最大(11.4-12.3 n/mm2)。丙烯酸加固大跨度桥梁(模型 3)的应力分布模式显示,纤维加固带位于桥梁深处的区域应力最大(10.5-12.0 n/mm2)。双丙烯酸加固大跨度牙桥(模型 4)的应力分布模式显示,玻璃纤维加固带所在区域和咬合面的应力最大(9.8-10.5 n/mm2)。结论有限元分析证实了用玻璃纤维加固丙烯酸或双丙烯酸树脂制作的大跨度临时牙桥的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
FINITE ELEMENT STUDY EVALUSTION OF GLASS FIBER REINFORCED FIXED PROSTHESES MADE OF ACRYLIC AND BIS-ACRYLIC RESIN MATERIALS
The use of interim (provisional) prostheses is an obligate stage of modern dental practice. The problem of provisional bridges recognized by most experts is their use under heavy occlusal stress due to the possibility of their fracture. The development of a simple method of reinforcing provisional of prostheses during a clinical appointment that does not require special equipment is an urgent scientific and practical task. Objectives. The goal of this study was to evaluate the stress distribution in fiberglass reinforced and non-reinforced short-span and long-span provisional bridges according to different acrylic and bis-acrylic resin. Methodology. For this purpose, four finite element models were developed to reproduce the properties of prosthetic materials and hard dental tissues (Young’s modulus, Poisson’s ratio, hardness). Each model was subjected to a vertical load of 100 N applied to the middle of the bridge. Calculations were carried out in APM 3D Studio, and the results obtained were monitored in Ansys 12.2. The results obtained were displayed on the monitor screen, printed and analyzed. Results. Stress distribution pattern for an acrylic non-reinforced short-span bridge (model 1) showed the highest stress (4.2–5.2 n/mm2) in the area of the occlusal surface. Stress distribution pattern for an acrylic non-reinforced long-span bridge (model 2) showed the highest stress (11.4–12.3 n/mm2) both in the load zone and in the cervical zones of the connector facing the defect. Stress distribution pattern for acrylic reinforced long-span bridge (model 3) showed the highest stress (10.5–12.0 n/mm2) in the area where the fiber reinforcing tape is located deep in the bridge. Stress distribution pattern for bis-acrylic reinforced long-span bridge (model 4) showed the highest stress (9.8–10.5 n/mm2) observed both in the area where the glass fiber reinforcing tape is located and on the occlusal surface. Conclusion. Finite element analysis confirmed the feasibility of fiberglass reinforcement of long-span provisional bridges made of acrylic or bis-acrylic resin.
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