Scotti Roberto, Valandro Luiz Felipe, Galhano Graziela Avila Prado, Baldissara Paolo, Bottino Marco Antonio
Department of Oral Sciences (Prosthodontics), Alma Mater Studiorum, University of Bologna, Bologna, Italy.
Int J Prosthodont. 2006 Sep-Oct;19(5):504-6.
This study evaluated the influence of the cementation length of glass fiber-reinforced composite (FRC) on the fatigue resistance of bovine teeth restored with an adhesively cemented FRC. Thirty roots of single-rooted bovine teeth were allocated to 3 groups (n = 10), according to the ratio of crown length/root length (post cementation length): group 1 = 2/3, group 2 = 1/2, and group 3 = 1/1. The roots were prepared, the fiber posts (FRC Postec Plus) were cemented, and the specimens were submitted to 2 million mechanical cycles. After fatigue testing, a score was given based on the number of fatigue cycles until fracture, and data were submitted to statistical analysis. All specimens were resistant to fatigue. Taking into account the methodology and results of this study, the evaluated fiber posts can be cemented based on the ratio of crown/root at 1/1. Further clinical studies must be conducted to verify this ratio.
本研究评估了玻璃纤维增强复合材料（FRC）的粘结长度对采用粘结式FRC修复的牛牙疲劳抗力的影响。根据冠长/根长（桩粘结长度）的比例，将30颗单根牛牙的牙根分为3组（n = 10）：第1组= 2/3，第2组= 1/2，第3组= 1/1。制备牙根，粘结纤维桩（FRC Postec Plus），并将标本进行200万次机械循环。疲劳测试后，根据直至断裂的疲劳循环次数给出评分，并将数据进行统计分析。所有标本均具有抗疲劳能力。考虑到本研究的方法和结果，所评估的纤维桩可根据冠/根比例为1/1进行粘结。必须开展进一步的临床研究以验证该比例。
