Torbjörner A, Karlsson S, Syverud M, Hensten-Pettersen A
Department of Prosthetic Dentistry, Faculty of Odontology, University of Göteborg, Sweden.
Eur J Oral Sci. 1996 Oct-Dec;104(5-6):605-11. doi: 10.1111/j.1600-0722.1996.tb00149.x.
The aim of this study was to compare the mechanical properties of a prefabricated root canal post made of carbon fiber reinforced composites (CFRC) with metal posts and to assess the cytotoxic effects elicited. Flexural modulus and ultimate flexural strength was determined by 3 point loading after CRFC posts had been stored either dry or in water. The bending test was carried out with and without preceding thermocycling of the CFRC posts. The cytotoxicity was evaluated by an agar overlay method after dry and wet storage. The values of flexural modulus and ultimate flexural strength were for dry stored CFRC post 82 +/- 6 GPa and 1154 +/- 65 MPa respectively. The flexural values decreased significantly after water storage and after thermocycling. No cytotoxic effects were observed adjacent to any CFRC post. Although fiber reinforced composites may have the potential to replace metals in many clinical situations, additional research is needed to ensure a satisfying life-span.
本研究的目的是比较由碳纤维增强复合材料（CFRC）制成的预制根管桩与金属桩的力学性能，并评估其引发的细胞毒性作用。在CFRC桩干燥或水中储存后，通过三点加载测定其弯曲模量和极限弯曲强度。对CFRC桩进行了有无热循环预处理的弯曲试验。在干燥和潮湿储存后，通过琼脂覆盖法评估细胞毒性。干燥储存的CFRC桩的弯曲模量和极限弯曲强度值分别为82±6 GPa和1154±65 MPa。储存于水中和热循环后，弯曲值显著降低。在任何CFRC桩附近均未观察到细胞毒性作用。尽管纤维增强复合材料在许多临床情况下可能有取代金属的潜力，但仍需要进一步研究以确保令人满意的使用寿命。
