The durability of a fluoride-releasing resin adhesive system to dentin.
The durability of a fluoride-releasing resin adhesive system to dentin.
复制标题
含氟树脂粘合剂系统对牙本质的耐久性。
作者：
M. Nakajima;M. Okuda;M. Ogata;P. Pereira;J. Tagami;D. Pashley
通过测定无氟（SE Bond）和含氟（KBF）自蚀刻底漆/胶粘剂体系与体外牙本质的微拉伸结合强度（microTBS），比较了两种体系的耐久性。粘合后，将修复的牙齿连续切割成多个板，在粘合界面处修剪成1 mm2的横截面积。对于3个月和6个月的标本，一半被指甲油完全覆盖（SE+, KBF+），而另一半则在37℃的水中孵育，没有任何保护漆（SE-, KBF-）。1天样品SE Bond的微tbs值为44.6 +/- 11.2 MPa， KBF的微tbs值为39.8 +/- 8.0 MPa （p < 0.05）。未涂指甲油的标本在水中孵育3个月和6个月时，SE-组的微tbs分别下降到26.3 +/- 8.8 MPa和23.6 +/- 10.7 MPa，而涂指甲油的标本则没有变化（SE+、41.9 +/- 12.8 MPa和41.8 +/- 9.8 MPa）。相比之下，在与含氟树脂（KBF）粘合的标本中，未受保护的标本的粘合强度在3个月和6个月的时间内没有变化。值分别为32.4 +/- 6.1 MPa和36.8 +/- 2.3 MPa。同样，经过清漆保护的KBF+标本在3个月和6个月内没有变化（分别为39.3 +/- 13.6 MPa和40.9 +/- 14.7 MPa）。结果表明，在6个月的储存中，粘结强度的下降与水有关，但可以通过使用含氟树脂来防止。
The durability of a fluoride-free (SE Bond) and a fluoride-containing (KBF) self-etching primer/ adhesive system were compared by measuring the microtensile bond strengths (microTBS) of these adhesive systems to human dentin in vitro. After bonding, the restored teeth were serially sectioned into multiple slabs that were trimmed to a 1 mm2 cross-sectional area at the bonded interface. For the three and six month specimens, half were fully covered with nail varnish (SE+, KBF+), while the other half were incubated at 37 degrees C in water without any protective varnish (SE-, KBF-). The microTBS of the one-day specimens were 44.6 +/- 11.2 MPa for SE Bond and 39.8 +/- 8.0 MPa for KBF (p > 0.05). When unprotected specimens were incubated in water for three and six months, the microTBS fell to 26.3 +/- 8.8 MPa and 23.6 +/- 10.7 MPa for SE-, respectively, but did not change in the specimens protected with nail varnish (SE+, 41.9 +/- 12.8 MPa and 41.8 +/- 9.8 MPa, respectively). In contrast, in specimens bonded with a fluoride-containing resin, KBF, the bond strengths of the unprotected specimens did not change over three and six months KBF-. Values were 32.4 +/- 6.1 MPa and 36.8 +/- 2.3 MPa, respectively. Similarly, varnish-protected KBF+ specimens did not change over three and six months (39.3 +/- 13.6 MPa and 40.9 +/- 14.7 MPa, respectively). The results indicate that decreases in bond strength over six months' storage are water-dependent but can be prevented by using fluoride-containing resins.