Oguz Ahmet Bebek Serra, Egilmez Ferhan, Ergun Gulfem, Cekic Nagas Isil
Department of Prosthodontics, Faculty of Dentistry, Medipol University, Istanbul, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
Am J Dent. 2019 Jun;32(3):113-117.
To compare the effect of different surface treatments on the bond strength of CAD/CAM fabricated resin-based and prefabricated fiber posts to root canal dentin.
160 single-rooted human teeth were selected and received endodontic treatment. The teeth were divided into four groups according to the post material used: (1) Prefabricated fiber-reinforced composite post (Snowpost), (2) CAD/CAM nanoceramic (Cerasmart), (3) CAD/CAM polymer infiltrated ceramic (Vita Enamic) and (4) CAD/CAM resin nanoceramic (Lava Ultimate). Then the posts were randomly assigned into four sub-groups according to the surface treatment method used: (1) Control (no treatment), (2) Laser (Er,Cr:YSGG laser device, Waterlase), (3) Hydrofluoric acid treatment [ 9.6% HF (Pulpdent) for 2 minutes], and (4) Sandblasting (50 µm Al2O3). Following post space preparation, posts were cemented with dual-cure resin cement (Panavia SA cement plus). From each root, five 1 mm-thick slices were obtained. The micropush-out bond strength test was performed for each slice. Data were analyzed by using two-way ANOVA and Tukey HSD tests. The fracture modes were evaluated under a stereomicroscope. Representative specimens were analyzed with SEM following surface treatments.
Micropush-out bond strength of posts to dentin was significantly affected by the type of post material (P< 0.05), but not by the surface treatment (P= 0.397).
Posts manufactured by CAD/CAM could be suitable options for restoration of severely affected endodontically-treated teeth.
比较不同表面处理对计算机辅助设计与制造（CAD/CAM）制作的树脂基桩和预制纤维桩与根管牙本质粘结强度的影响。
选取160颗单根人牙进行根管治疗。根据所使用的桩材料将牙齿分为四组：（1）预制纤维增强复合桩（Snowpost），（2）CAD/CAM纳米陶瓷桩（Cerasmart），（3）CAD/CAM聚合物渗透陶瓷桩（Vita Enamic），（4）CAD/CAM树脂纳米陶瓷桩（Lava Ultimate）。然后根据所使用的表面处理方法将桩随机分为四个亚组：（1）对照组（未处理），（2）激光处理组（铒铬：钇-钪-镓石榴石激光设备，Waterlase），（3）氢氟酸处理组[9.6%氢氟酸（Pulpdent）处理2分钟]，（4）喷砂处理组（50μm氧化铝）。在制备桩道后，用双固化树脂水门汀（Panavia SA水门汀加）粘结桩。从每个牙根获取五片1mm厚的切片。对每个切片进行微推出粘结强度测试。数据采用双向方差分析和Tukey HSD检验进行分析。在体视显微镜下评估断裂模式。对代表性标本进行表面处理后用扫描电子显微镜分析。
桩与牙本质的微推出粘结强度受桩材料类型的显著影响（P<0.05），但不受表面处理的影响（P=0.397）。
CAD/CAM制作的桩可能是严重受影响的根管治疗后牙齿修复的合适选择。
