Han Sang Yeon, Moon Yun-Hee, Lee Jonghyuk
Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Republic of Korea.
Department of Dental Laboratory Technology, Daejeon Health Institute of Technology, Daejeon, Republic of Korea.
J Adv Prosthodont. 2020 Oct;12(5):251-258. doi: 10.4047/jap.2020.12.5.251. Epub 2020 Oct 26.
The bond strengths between resin denture teeth with various compositions and denture base resins including conventional and AD/CAM purposed materials were evaluated to find influence of each material.
Cylindrical rods (6.0 mm diameter × 8.0 mm length) prepared from pre-polymerized CAD/CAM denture base resin blocks (PMMA Block-pink; Huge Dental Material, Vipi Block-Pink; Vipi Industria) were bonded to the basal surface of resin teeth from three different companies (VITA MFT®; VITA Zahnfabrik, Endura Posterio®; SHOFU Dental, Duracross Physio®; Nissin Dental Products Inc.) using resin cement (Super-Bond C&B; SUN MEDICAL). As a control group, rods from a conventional heat-polymerizing denture base resin (Vertex™ Rapid Simplified; Vertex-Dental B.V. Co.) were attached to the resin teeth using the conventional flasking and curing method. Furthermore, the effect of air abrasion was studied with the highly cross-linked resin teeth (VITA MFT®) groups. The shear bond strengths were measured, and then the fractured surfaces were examined to analyze the mode of failure.
The shear bond strengths of the conventional heat-polymerizing PMMA denture resin group and the CAD/CAM denture base resin groups were similar. Air abrasion to VITA MFT® did not improve shear bond strengths. Interfacial failure was the dominant cause of failure for all specimens.
Shear bond strengths of CAD/CAM denture base materials and resin denture teeth using resin cement are comparable to those of conventional methods.
评估具有不同成分的树脂义齿牙与包括传统材料和用于增材制造/计算机辅助制造（AD/CAM）的义齿基托树脂之间的粘结强度，以探究每种材料的影响。
由预聚合的CAD/CAM义齿基托树脂块（PMMA块 - 粉色；Huge Dental Material，Vipi块 - 粉色；Vipi Industria）制备的圆柱形棒（直径6.0 mm×长度8.0 mm），使用树脂粘结剂（Super - Bond C&B；SUN MEDICAL）粘结到来自三个不同公司（VITA MFT®；VITA Zahnfabrik，Endura Posterio®；SHOFU Dental，Duracross Physio®；Nissin Dental Products Inc.）的树脂牙的基底面。作为对照组，使用传统的装盒和固化方法，将来自传统热聚合义齿基托树脂（Vertex™ Rapid Simplified；Vertex - Dental B.V. Co.）的棒附着到树脂牙上。此外，对高度交联的树脂牙（VITA MFT®）组研究了空气喷砂的效果。测量剪切粘结强度，然后检查断裂表面以分析失效模式。
传统热聚合PMMA义齿树脂组和CAD/CAM义齿基托树脂组的剪切粘结强度相似。对VITA MFT®进行空气喷砂并未提高剪切粘结强度。界面失效是所有试样失效的主要原因。
使用树脂粘结剂的CAD/CAM义齿基托材料与树脂义齿牙之间的剪切粘结强度与传统方法相当。
