Passos Sheila Pestana, Santos Maria Jacinta M C, El-Mowafy Omar, Rizkalla Amin S, Santos Gildo Coelho
Department of Dental Materials and Prosthodontics, Sao Jose dos Campos Dental School, Sao Paulo State University, Sao Jose dos Campos, SP, Brazil.
Gen Dent. 2011 Mar-Apr;59(2):125-8; quiz 129-30.
The aim of this study was to determine the influence of different types of posts and post head designs on the fracture resistance of a composite resin core material using the diametral tensile strength (DTS ). Seventy-five disc specimens were prepared using a composite core and prefabricated glass fiber posts and were divided into four test groups and one control group (n=15). The use of fiber posts reduced the DTS of the composite core material; the DTS value of the control material was significantly higher (p=0.05) than all of the test groups.
本研究的目的是使用径向拉伸强度（DTS）来确定不同类型的桩和桩头设计对复合树脂核材料抗折强度的影响。使用复合核和预制玻璃纤维桩制备了75个圆盘标本，并将其分为四个测试组和一个对照组（n = 15）。纤维桩的使用降低了复合核材料的DTS；对照材料的DTS值显著高于所有测试组（p = 0.05）。
