光固化树脂用于咬合板适用性的体外研究：第二部分：表面硬度

Danesh Gholamreza, Lippold Carsten, Ziebura Thomas, Reinhardt Klaus-Jürgen, Schäfer Edgar, Ehmer Ulrike

Department of Orthodontics and Dentofacial Orthopedics, University of Münster, Münster, Germany.

J Orofac Orthop. 2006 Mar;67(2):138-47. doi: 10.1007/s00056-006-5032-5.

OBJECTIVE

The aim of the present study was to determine the surface hardness of light- and auto-cured resins for the fabrication of occlusal splints employing Vickers hardness measurements.

MATERIALS AND METHOD

In this study we used three auto-polymerized resins (Palapress, Orthocryl, Steady-Resin M) and four light-polymerized resins (Acrylight, Primosplint, Triad Tran- Sheet Colorless and Triad TranSheet Pink). The Vickers hardness measurement was carried out by means of a universal Durimet indenter applying a test load of 50 g for 30 seconds. The light-cured resins were polymerized in a Tagris Power light oven for 10 and 15 minutes each. Three separate test series were carried out (the hardness of plates under optimal conditions and of occlusal splints was measured, and the curing of light-polymerizing materials in layers of varying depth was evaluated). Data underwent statistical analysis via ANOVA and the Scheffé test.

RESULTS

The microhardness determined in each case amounted to values between 10.4 HV 0.5 and 39.3 HV 0.5. The Vickers hardness determined for the plates that had been produced under optimal conditions demonstrated that their surface was significantly (p < 0.05) harder than that of cylinders and splints. The hardness values of the light-cured material Triad TranSheet Pink (39.3 HV 0.5) were significantly higher (p < 0.05) than those of all other resins. In all auto-polymerized resins, the surface hardness of the samples we examined (in the form of plates and splints) was significantly lower (p < 0.05) than that of the light-cured materials Triad TranSheet Pink and Colorless.

CONCLUSION

The results we have obtained so far concerning surface hardness indicate that, in the fabrication of occlusal splints, light-cured resins may represent an alternative to auto-polymerizing materials.

目的

本研究旨在通过维氏硬度测量法测定用于制作咬合板的光固化树脂和自凝树脂的表面硬度。

材料与方法

在本研究中，我们使用了三种自凝树脂（Palapress、Orthocryl、Steady-Resin M）和四种光固化树脂（Acrylight、Primosplint、Triad Tran-Sheet Colorless和Triad TranSheet Pink）。维氏硬度测量通过通用杜里米特压头进行，施加50克的试验载荷，持续30秒。光固化树脂在Tagris Power光固化炉中分别聚合10分钟和15分钟。进行了三个独立的测试系列（测量最佳条件下板材和咬合板的硬度，并评估光聚合材料在不同深度层中的固化情况）。数据通过方差分析和谢费检验进行统计分析。

结果

每种情况下测定的显微硬度值在10.4 HV 0.5至39.3 HV 0.5之间。在最佳条件下生产的板材的维氏硬度表明，其表面比圆柱体和咬合板的表面显著更硬（p < 0.05）。光固化材料Triad TranSheet Pink的硬度值（39.3 HV 0.5）显著高于所有其他树脂（p < 0.05）。在所有自凝树脂中，我们检查的样品（板材和咬合板形式）的表面硬度显著低于光固化材料Triad TranSheet Pink和无色款（p < 0.05）。