Casselli Denise Sá Maia, Worschech Claudia Cia, Paulillo Luis Alexandre Maffei Sartini, Dias Carlos Tadeu Dos Santos
Department of Restorative Dentistry, School of Dentristry of Piracicaba, State University of Campinas.
Braz Oral Res. 2006 Jul-Sep;20(3):214-8. doi: 10.1590/s1806-83242006000300006.
The aim of this study was to evaluate the diametral tensile strength (DTS) of composite resins submitted to different curing techniques. Four composite resins were tested in this study: Targis (Ivoclar), Solidex (Shofu), Charisma (Heraeus-Kulzer) and Filtek Z250 (3M Espe). Sixty-four cylindrical specimens were prepared and divided into eight groups according to each polymerization technique (n = 8). The indirect composite resins (Targis and Solidex) were polymerized with their respective curing systems (Targis Power and EDG-lux); Charisma and Filtek Z250 were light-cured with conventional polymerization (halogen light) and additionally, with post-curing systems. Specimens were stored in artificial saliva at 37 degrees C for one week. DTS tests were performed in a Universal Testing Machine (0.5 mm/min). The data were statistically analyzed by ANOVA and Duncan tests. The results were (MPa): Z250/EDG-lux: 69.04 feminine; Z250/Targis Power: 68.57 feminine; Z250/conventional polymerization: 60.75b; Charisma/Targis Power: 52.34c; Charisma/conventional polymerization: 49.17c; Charisma/EDG-lux: 47.98c; Solidex: 36.62d; Targis: 32.86d. The results reveal that the post-cured Z250 composite resin showed the highest DTS means. Charisma composite presented no significant differences when activation techniques were compared. Direct composite resins presented higher DTS values than indirect resins.
本研究的目的是评估采用不同固化技术的复合树脂的径向拉伸强度（DTS）。本研究测试了四种复合树脂：Targis（义获嘉）、Solidex（松风）、Charisma（贺利氏古莎）和Filtek Z250（3M 埃斯佩）。制备了64个圆柱形试样，并根据每种聚合技术分为八组（n = 8）。间接复合树脂（Targis和Solidex）使用各自的固化系统（Targis Power和EDG-lux）进行聚合；Charisma和Filtek Z250采用传统聚合方式（卤素灯）进行光固化，并额外使用后固化系统。试样在37℃的人工唾液中储存一周。在万能试验机上以0.5 mm/分钟的速度进行DTS测试。数据通过方差分析和邓肯检验进行统计分析。结果如下（MPa）：Z250/EDG-lux：69.04；Z250/Targis Power：68.57；Z250/传统聚合：60.75b；Charisma/Targis Power：52.34c；Charisma/传统聚合：49.17c；Charisma/EDG-lux：47.98c；Solidex：36.62d；Targis：32.86d。结果显示，后固化的Z250复合树脂的DTS平均值最高。比较活化技术时，Charisma复合树脂没有显著差异。直接复合树脂的DTS值高于间接树脂。
