Int J Oral Maxillofac Implants. 2022 Mar-Apr;37(2):339-345. doi: 10.11607/jomi.9329.
To evaluate the use of a new resin metal opaquer on the surface of titanium abutments, in combination with two luting agents, and its effect on the retentive strength of implant-supported zirconia copings.
Sixty customized titanium abutments were designed and fabricated with virtual design software and a milling machine. Thirty abutment specimens were coated with metal opaquers, and the others were not coated. Then, the titanium abutments were fitted into the implant analogs, and the abutment-implant analog complexes were embedded in acrylic resin blocks. Sixty CAD/CAM-fabricated zirconia copings were seated on the abutments and secured with glassionomer cement or self-adhesive resin cement. The specimens were stored in 100% humidity for 1 hour and artificial saliva for 23 hours at 37°C before thermocycling for 5,000 cycles of 5°C to 55°C with a 30-second dwell time. The retentive strength was measured using a pull-out test with a universal testing machine. The dislodgment forces were statistically analyzed via two-way analysis of variance (ANOVA). The failure modes were evaluated and categorized by examining the fracture surface.
The metal opaquer material had a significant negative effect on retention of zirconia copings. The nonopaquer titanium abutments showed significantly (P < .05) higher retentive strength than the metal opaquer abutments. Comparing the cements, the retentive strength values of self-adhesive resin cement were significantly higher than those of glass-ionomer cement. The metal opaquer groups exhibited mostly mixed-type failures, a combination of adhesive failures and cohesive failures, whereas the nonopaquer groups showed mostly adhesive-type failures.
The titanium abutments coated with the new metal opaquer material resulted in a reduction of retentive strength. Self-adhesive resin cements exhibited significantly higher retention than glass-ionomer cements.
评估一种新的树脂金属遮色剂在钛基台表面的应用，结合两种粘固剂，及其对种植体支持氧化锆全瓷修复体固位力的影响。
通过虚拟设计软件和铣床设计和制作 60 个定制钛基台。30 个基台样本涂有金属遮色剂，其余基台样本未涂。然后，将钛基台安装到种植体模拟体上，并将基台-种植体模拟体复合物嵌入丙烯酸树脂块中。将 60 个 CAD/CAM 制作的氧化锆全瓷修复体安装到基台上，并用玻璃离子水门汀或自粘接树脂水门汀固定。将样本在 100%湿度下储存 1 小时，在 37°C 下储存人工唾液 23 小时，然后在 5°C 至 55°C 之间进行 5000 次热循环，每次循环 30 秒。使用万能试验机进行拔出试验测量固位力。通过双因素方差分析（ANOVA）对脱位力进行统计学分析。通过检查断裂面评估和分类失效模式。
金属遮色剂材料对氧化锆全瓷修复体的固位力有显著的负面影响。非遮色剂钛基台的固位力明显（P<0.05）高于金属遮色剂基台。比较两种粘固剂，自粘接树脂水门汀的固位力值明显高于玻璃离子水门汀。金属遮色剂组主要表现为混合性失效，即粘结失效和内聚失效的组合，而非遮色剂组主要表现为粘结性失效。
涂有新型金属遮色剂材料的钛基台固位力降低。自粘接树脂水门汀的固位力明显高于玻璃离子水门汀。
