Botta Sergio B, Vieira Samuel N, Cordon Rosely, Marques Marcia M, Matos Adriana B
Department of Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
J Contemp Dent Pract. 2009 Jan 1;10(1):49-57.
The aim of this study was to evaluate how cavity preparation and primer application methods influence the adhesion of composite resin to dentin using a self-etching system.
Forty-eight extracted, sound human molars were divided into six groups (n=8) according to the method used for the surface preparation of the teeth (#600-grit paper disc, diamond bur, and Er:YAG laser) and the primer application method utilized (active or passive). Following the adhesive procedure using a self-etching system, 5 mm high composite buildups were created with Z-250 composite resin. After storage in water at 37 degrees C for 24 hours, the specimens were vertically sectioned into serial 1 mm2 sticks and tested for microtensile strength (micro-TBS). Nine additional molars were prepared for morphological analysis using scanning electron microscopy (SEM).
Statistical analysis showed surface preparation technique (p < 0.00) and primer application methods (p < 0.001) do influence bond strength of the self-etching system tested. The best adhesion was achieved with specimens having the dentin ground with sandpaper followed by those ground with diamond burs. The worst bonding was obtained with Er:YAG laser ablated dentin. The active primer application method increased bonding performance compared to the passive method.
Within the limitations of the study, it can be stated surface treatment can influence the bond strength of the self-etching system tested and the active primer application method is more effective in achieving success in bonding to dentin compared with the passive application method.
Clinicians should use the active application method to apply a mild acidic self-etching primer along with an appropriate tooth surface preparation to facilitate the bond strength between dentin and composite resin.
本研究旨在评估使用自酸蚀系统时，窝洞预备和底漆应用方法如何影响复合树脂与牙本质的粘结。
根据牙齿表面预备方法（600目砂纸盘、金刚砂车针和铒钇铝石榴石激光）和底漆应用方法（主动或被动），将48颗拔除的健康人磨牙分为六组（n = 8）。使用自酸蚀系统进行粘结程序后，用Z - 250复合树脂制作5毫米高的复合树脂堆积体。在37℃水中储存24小时后，将标本垂直切成连续的1平方毫米薄片，并测试其微拉伸强度（微TBS）。另外制备9颗磨牙用于扫描电子显微镜（SEM）形态分析。
统计分析表明，表面预备技术（p < 0.00）和底漆应用方法（p < 0.001）确实会影响所测试的自酸蚀系统的粘结强度。用砂纸打磨牙本质的标本粘结效果最佳，其次是用金刚砂车针打磨的标本。铒钇铝石榴石激光消融牙本质的粘结效果最差。与被动方法相比，主动底漆应用方法提高了粘结性能。
在本研究的局限性范围内，可以表明表面处理会影响所测试的自酸蚀系统的粘结强度，并且与被动应用方法相比，主动底漆应用方法在实现与牙本质粘结成功方面更有效。
临床医生应使用主动应用方法，同时进行适当的牙齿表面预备，以应用轻度酸性的自酸蚀底漆，促进牙本质与复合树脂之间的粘结强度。
