使用不同粘结策略粘结在牙本质上的CAD/CAM 块的抗折强度。

Fracture resistance of CAD/CAM blocks cemented on dentin using different cementation strategies.

作者信息

Anuntasainont Munlika, Po-Ngam Nanthiphorn, Lührs Anne-Katrin, Neoh Siew Peng, Pongprueksa Pong

机构信息

Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.

Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany.

出版信息

J Prosthodont Res. 2023 Oct 13;67(4):603-609. doi: 10.2186/jpr.JPR_D_22_00196. Epub 2023 Feb 14.

DOI:10.2186/jpr.JPR_D_22_00196

PMID:36792222

Abstract

PURPOSE

To determine whether the fracture resistance of computer-aided design/computer-aided manufacturing (CAD/CAM) resin-based composites and polymer-infiltrated ceramic network materials cemented on dentin is influenced by the restoration thickness and composite cement application strategy.

METHODS

Disc-shaped specimens (Ø = 7 mm) of 0.8 mm and 1.5 mm thicknesses were milled from two CAD/CAM materials: resin-based composite (RBC, Cerasmart 270) and polymer-infiltrated ceramic network (PICN, Vita Enamic). The discs (n = 8 per group) were cemented on flattened dentin using three different cementation strategies: 1) self-adhesive composite cement (RelyX U200) in light-curing mode (LC-SAC), 2) universal adhesive (Single Bond Universal) with composite cement (RelyX Ultimate) in auto-curing mode (AC cement), and 3) adhesive and composite cement as in 2) but in light-curing mode (LC cement). The restorative surface was indented perpendicularly with a compressive load using a universal testing machine until fracture. The fracture resistance (N) of RBC and PICN was separately analyzed using two-way ANOVA and Tukey's post-hoc test (α = 0.05).

RESULTS

The fracture resistance of each material was significantly influenced by the material thickness and cementation strategy (P < 0.05). Irrespective of the material type and cementation strategy, thicker materials exhibit higher fracture resistance. For RBC, the fracture resistance of the LC cement group was significantly higher than that of AC cement only at 0.8 mm thickness. For PICN, the LC-cement cementation strategy produced superior fracture resistance, regardless of the restoration thickness.

CONCLUSIONS

The fracture resistance of Cerasmart 270 was higher for the thicker material; the fracture resistance of LC cement was higher than that of AC cement at 0.8 mm thickness cemented to dentin. In comparison, LC cement showed the highest fracture resistance for Vita Enamic for both material thicknesses.

摘要

目的

确定计算机辅助设计/计算机辅助制造（CAD/CAM）树脂基复合材料和聚合物渗透陶瓷网络材料粘结在牙本质上的抗折强度是否受修复体厚度和复合树脂粘结剂应用策略的影响。

方法

从两种CAD/CAM材料（树脂基复合材料（RBC，Cerasmart 270）和聚合物渗透陶瓷网络（PICN，Vita Enamic））铣削出厚度为0.8mm和1.5mm的圆盘形试件（Ø = 7mm）。将圆盘（每组n = 8）使用三种不同的粘结策略粘结在平整的牙本质上：1）光固化模式下的自粘结复合树脂粘结剂（RelyX U200）（LC-SAC），2）通用粘结剂（Single Bond Universal）与复合树脂粘结剂（RelyX Ultimate）在自固化模式下（AC粘结剂），以及3）如2）中所述的粘结剂和复合树脂粘结剂但在光固化模式下（LC粘结剂）。使用万能试验机垂直施加压缩载荷对修复表面进行压痕直至断裂。使用双向方差分析和Tukey事后检验（α = 0.05）分别分析RBC和PICN的抗折强度（N）。