Piitulainen Jaakko M, Mattila Riina, Moritz Niko, Vallittu Pekka K
Division of Surgery and Cancer Diseases, Department of Otorhinolaryngology-Head and Neck Surgery, Turku University Hospital, Turku - Finland.
University of Turku, Turku - Finland.
J Appl Biomater Funct Mater. 2017 Nov 10;15(4):e356-e361. doi: 10.5301/jabfm.5000375.
Glass fiber-reinforced composites (FRCs) have been adapted for routine clinical use in various dental restorations and are presently also used in cranial implants. The aim of this study was to measure the load-bearing capacity and failure type of glass FRC implants during static loading with and without interconnective bars and with different fixation modes.
Load-bearing capacities of 2 types of FRC implants with 4 different fixation modes were experimentally tested. The sandwich-like FRC implants were made of 2 sheets of woven FRC fabric, which consisted of silanized, woven E-glass fiber fabrics impregnated in BisGMA-TEGDMA monomer resin matrix. The space between the outer and inner surfaces was filled with glass particles. All FRC implants were tested up to a 10-mm deflection with load-bearing capacity determined at 6-mm deflection. The experimental groups were compared using nonparametric Kruskal-Wallis analysis with Steel-Dwass post hoc test.
FRC implants underwent elastic and plastic deformation until 6-mm deflection. The loading test did not demonstrate any protrusions of glass fibers or cut fiber even at 10-mm deflection. An elastic and plastic deformation of the implant occurred until the FRC sheets were separated from each other. In the cases of the free-standing setup (no fixation) and the fixation with 6 screws, the FRC implants with 2 interconnective bars showed a significantly higher load-bearing capacity compared with the implant without interconnective bars.
FRC implants used in this study showed a load-bearing capacity which may provide protection for the brain after cranial bone defect reconstruction.
玻璃纤维增强复合材料（FRCs）已被应用于各种牙科修复的常规临床使用，目前也用于颅骨植入物。本研究的目的是测量有无连接杆及不同固定方式下玻璃FRC植入物在静态加载过程中的承载能力和失效类型。
对2种类型的FRC植入物采用4种不同的固定方式进行实验测试其承载能力。三明治样FRC植入物由2片编织FRC织物制成，该织物由浸渍在双酚A-二缩水甘油醚甲基丙烯酸酯（BisGMA-TEGDMA）单体树脂基质中的硅烷化编织E玻璃纤维织物组成。内外表面之间的空间填充有玻璃颗粒。所有FRC植入物均测试至10毫米挠度，在6毫米挠度时确定承载能力。使用非参数Kruskal-Wallis分析和Steel-Dwass事后检验对实验组进行比较。
FRC植入物在6毫米挠度之前经历弹性和塑性变形。即使在10毫米挠度时，加载测试也未显示玻璃纤维有任何突出或纤维被切断的情况。植入物发生弹性和塑性变形，直至FRC片材彼此分离。在独立设置（无固定）和用6颗螺钉固定的情况下，与没有连接杆的植入物相比，带有2根连接杆的FRC植入物显示出显著更高的承载能力。
本研究中使用的FRC植入物显示出的承载能力可能为颅骨缺损重建后脑组织提供保护。
