Department of Fixed Prosthetic Dentistry, Advanced Therapeutic Course, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.
Dent Mater J. 2013;32(3):433-40. doi: 10.4012/dmj.2012-313.
This study evaluated the effect of abutment materials on the fracture resistance of composite crowns for premolars. Composite crowns were fabricated using two different indirect composite resin materials (Meta Color Prime Art or Estenia C&B) and cemented onto either a metal (Castwell M.C. 12) or composite resin (Build-It FR and FibreKor) abutment with resin cement (Panavia F2.0). Twenty-four specimens were fabricated for four groups (n=6 each) and subjected to 280-N cyclic impact loading at 1.0 Hz. The number of cycles which caused the composite crown to fracture was defined as its fracture resistance. All data were statistically analyzed using ANOVA and the Bonferroni test (α=0.05). Composite crowns cemented onto resin abutments showed higher fracture resistance than those cemented onto metal abutments.
本研究评估了基台材料对前磨牙复合树脂冠抗折裂性能的影响。使用两种不同的间接复合树脂材料（Meta Color Prime Art 或 Estenia C&B）制作复合树脂冠，并使用树脂水门汀（Panavia F2.0）分别黏固于金属（Castwell M.C. 12）或复合树脂基台（Build-It FR 和 FibreKor）上。将 24 个样本分为四组（每组 6 个），以 1.0 Hz 的频率施加 280-N 的循环冲击载荷。导致复合树脂冠断裂的循环次数定义为其抗折裂性能。所有数据均采用方差分析和 Bonferroni 检验（α=0.05）进行统计学分析。黏固于树脂基台上的复合树脂冠的抗折裂性能高于黏固于金属基台上的复合树脂冠。
