Tsujimoto Akimasa, Barkmeier Wayne W, Erickson Robert L, Takamizawa Toshiki, Latta Mark A, Miyazaki Masashi
Department of Operative Dentistry, Nihon University School of Dentistry.
Department of General Dentistry, Creighton University School of Dentistry.
Dent Mater J. 2018 Jan 30;37(1):113-121. doi: 10.4012/dmj.2017-012. Epub 2017 Sep 28.
The influence of the number of cycles on shear fatigue strength to enamel and dentin using dental adhesives in self-etch mode was investigated. A two-step self-etch adhesive and two universal adhesives were used to bond to enamel and dentin in self-etch mode. Initial shear bond strength and shear fatigue strength to enamel and dentin using the adhesive in self-etch mode were determined. Fatigue testing was used with 20 Hz frequency and cycling periods of 50,000, 100,000 and 1,000,000 cycles, or until failure occurred. For each of the cycling periods, there was no significant difference in shear fatigue strength across the cycling periods for the individual adhesives. Differences in shear fatigue strength were found between the adhesives within the cycling periods. Regardless of the adhesive used in self-etch mode for bonding to enamel or dentin, shear fatigue strength was not influenced by the number of cycles used for shear fatigue strength testing.
研究了在自酸蚀模式下使用牙科粘合剂时，循环次数对牙釉质和牙本质剪切疲劳强度的影响。使用一种两步自酸蚀粘合剂和两种通用粘合剂在自酸蚀模式下与牙釉质和牙本质粘结。测定了在自酸蚀模式下使用粘合剂时，对牙釉质和牙本质的初始剪切粘结强度和剪切疲劳强度。疲劳测试采用20Hz频率，循环周期为50000、100000和1000000次循环，或直至发生失效。对于每个循环周期，各粘合剂在不同循环周期的剪切疲劳强度无显著差异。在循环周期内，各粘合剂之间的剪切疲劳强度存在差异。无论在自酸蚀模式下使用何种粘合剂粘结牙釉质或牙本质，剪切疲劳强度均不受用于剪切疲劳强度测试的循环次数的影响。
