Signore Antonio, Benedicenti Stefano, Kaitsas Vassilios, Barone Michele, Angiero Francesca, Ravera Giambattista
Department of Biophysics, Medicine and Dentistry, University of Genoa, Largo Rosanna Benzi 10, 16132 Genoa, Italy.
J Dent. 2009 Feb;37(2):115-21. doi: 10.1016/j.jdent.2008.10.007. Epub 2008 Dec 17.
This retrospective study investigated the clinical effectiveness over up to 8 years of parallel-sided and of tapered glass-fiber posts, in combination with either hybrid composite or dual-cure composite resin core material, in endodontically treated, maxillary anterior teeth covered with full-ceramic crowns.
The study population comprised 192 patients and 526 endodontically treated teeth, with various degrees of hard-tissue loss, restored by the post-and-core technique. Four groups were defined based on post shape and core build-up materials, and within each group post-and-core restorations were assigned randomly with respect to root morphology. Inclusion criteria were symptom-free endodontic therapy, root-canal treatment with a minimum apical seal of 4mm, application of rubber dam, need for post-and-core complex because of coronal tooth loss, and tooth with at least one residual coronal wall. Survival rate of the post-and-core restorations was determined using Kaplan-Meier statistical analysis.
The restorations were examined clinically and radiologically; mean observation period was 5.3 years. The overall survival rate of glass-fiber post-and-core restorations was 98.5%. The survival rate for parallel-sided posts was 98.6% and for tapered posts was 96.8%. Survival rates for core build-up materials were 100% for dual-cure composite and 96.8% for hybrid light-cure composite.
For both glass-fiber post designs and for both core build-up materials, clinical performance was satisfactory. Survival was higher for teeth retaining four and three coronal walls.
本回顾性研究调查了平行边和锥形玻璃纤维桩在长达8年的时间里，与混合复合树脂或双固化复合树脂核材料联合使用，在接受过根管治疗、覆盖全瓷冠的上颌前牙中的临床效果。
研究人群包括192例患者和526颗接受过根管治疗的牙齿，这些牙齿存在不同程度的硬组织缺损，采用桩核技术进行修复。根据桩的形状和核材料构建定义了四组，每组内的桩核修复体根据牙根形态随机分配。纳入标准包括无症状的根管治疗、根尖封闭至少4mm的根管治疗、使用橡皮障、因冠部牙齿缺失需要桩核复合体以及至少有一个残余冠壁的牙齿。使用Kaplan-Meier统计分析确定桩核修复体的存活率。
对修复体进行了临床和影像学检查；平均观察期为5.3年。玻璃纤维桩核修复体的总体存活率为98.5%。平行边桩的存活率为98.6%，锥形桩的存活率为96.8%。核材料构建的双固化复合树脂存活率为100%，混合光固化复合树脂存活率为96.8%。
对于两种玻璃纤维桩设计和两种核材料构建，临床性能均令人满意。保留四个和三个冠壁的牙齿存活率更高。
