Mechanical properties and wear behavior of light-cured packable composite resins
Mechanical properties and wear behavior of light-cured packable composite resins
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DOI：
10.1016/s0109-5641(99)00082-2
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发表时间：
2000-01-01
期刊：
影响因子：
5
通讯作者：
Hickel, R
中科院分区：
文献类型：
--
作者：
Manhart, J;Kunzelmann, KH;Hickel, R
目标.测定三种可包装复合材料（Solitaire，Surefil，ALERT）和一种可包装ormocer（Definite）的弯曲强度，弯曲模量，断裂韧性和耐磨性，并与先进的混合复合材料（Tetric Ceram）和离子释放复合材料（Ariston pHc）进行比较。方法：在三点弯曲中测定每种材料的弯曲强度，弯曲模量和断裂韧性（每次试验n = 10）。用单边缺口弯曲试样评价了其断裂韧性（K-IC）。在50 N垂直载荷下，采用球形Degusit拮抗剂，在销-块设计中确定材料磨损（n = 8），并使用3D激光扫描仪通过复制技术进行定量。在6000、10000、30000和50000次负载循环后制备复制品。通过对稳态时间-磨损曲线进行线性回归分析，获得平均磨损率（MWR（μ m（3）cycle（-1）。采用ANOVA和事后Tukey HSD检验对所有结果进行统计学分析（p < 0.05）。结果：ALERT的弯曲模量（12.5 +/- 2.1 GPa）和K-IC（2.3 +/- 0.2 MN m（-3/2））最高，但耐磨性最低（8275 mu m（3）循环（-1））。Solitaire的耐磨性最高（1591 μ m（3）循环（-1）），但弯曲强度（81.6 +/- 10.0 MPa）、弯曲模量（4.4 +/- 0.3 GPa）和K-IC（1.4 +/- 0.2 MN m（-3/2））显著低于所有其他材料。Surefil的弯曲模量（9.3 +/- 0.9 GPa）和耐酸性（3028 μ m（3）循环（-1））显著高于Tetric Ceram（6.8 +/- 0.5 GPa; 5417 μ m（3）循环（-1））和Ariston pHc（7.3 +/- 0.8 GPa; 7194 μ m（3）循环（-1））。所测试的可包装复合树脂在其机械性能方面存在显著差异。本研究表明，复合树脂的断裂和磨损行为的高度影响的填料系统。总体而言，Surefil表现出良好的断裂力学参数和较低的磨损率。(C)2000年牙科材料学院。由Elsevier Science Ltd.出版，版权所有。
Objectives. Determination of flexural strength, flexural modulus, fracture toughness and wear resistance of three packable composites (Solitaire, Surefil, ALERT) and a packable ormocer (Definite) in comparison with an advanced hybrid composite (Tetric Ceram) and an ion-releasing composite (Ariston pHc).Methods: Flexural strength, flexural modulus and fracture toughness of each material were determined in three-point bending (each test n = 10). Single-edge notched-bend specimens were used to evaluate the fracture toughness (K-IC). Wear of the materials (n = 8) was determined in a pin-on-block-design with a spherical Degusit antagonist at 50 N vertical load and quantified by a replica technique using a 3D-laser scanner. Replicas were made after 6000, 10000, 30000 and 50000 load cycles. The mean wear rate (MWR (mu m(3) cycle(-1))) was obtained by a linear regression analysis in the steady-state of the time-wear-curve. All results were statistically analyzed with ANOVA and post hoc Tukey HSD tests (p < 0.05).Results: ALERT exhibited the highest flexural modulus (12.5 +/- 2.1 GPa) and K-IC (2.3 +/- 0.2 MN m(-3/2)), but the lowest wear resistance (8275 mu m(3) cycle(-1)). Solitaire presented the highest wear resistance (1591 mu m(3) cycle(-1)), but significantly lower flexural strength (81.6 +/- 10.0 MPa), flexural modulus (4.4 +/- 0.3 GPa), and K-IC (1.4 +/- 0.2 MN m(-3/2)) than all other materials. Surefil revealed a significantly higher flexural modulus (9.3 +/- 0.9 GPa) acid wear resistance (3028 mu m(3) cycle(-1)) than Tetric Ceram (6.8 +/- 0.5 GPa; 5417 mu m(3) cycle(-1)) and Ariston pHc (7.3 +/- 0.8 GPa; 7194 mu m(3) cycle(-1)).Significance. The tested packable composite resins differed significantly in their mechanical properties. This study suggested that fracture and wear behavior of the composite resins are highly influenced by the filler system. Overall, Surefil demonstrated good fracture mechanics parameters and a low: wear rate. (C) 2000 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.