Department of Preventive, Restorative, and Pediatric Dentistry, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland.
Biomed Res Int. 2018 Apr 19;2018:3895356. doi: 10.1155/2018/3895356. eCollection 2018.
This study investigated the effect of SnCl/AmF pretreatment on short- and long-term bond strength of resin composite to eroded dentin mediated by two self-etch, MDP-containing adhesive systems. 184 dentin specimens were produced from extracted human molars. Half the specimens ( = 92) were artificially eroded, and half were left untreated. For both substrates, half the specimens were pretreated with SnCl/AmF, and half were left untreated. The specimens were treated with Clearfil SE Bond or Scotchbond Universal prior to application of resin composite. Microtensile bond strength (TBS) was measured after 24 h or 1 year. Failure mode was detected and EDX was performed. TBS results were statistically analyzed ( = 0.05). TBS was significantly influenced by the dentin substrate (eroded < noneroded dentin) and storage time (24 h > 1 year; < 0.0001) but not by pretreatment with SnCl/AmF or adhesive system. The predominant failure mode was adhesive failure at the dentin-adhesive interface. The content of Sn was generally below detection limit. Pretreatment with SnCl/AmF did not influence short- and long-term bond strength to eroded dentin. Bond strength was reduced after storage for one year, was lower to eroded dentin than to noneroded dentin, and was similar for the two adhesive systems.
本研究探讨了 SnCl/AmF 预处理对两种自酸蚀、含 MDP 的黏接剂处理受酸蚀牙本质的短期和长期黏结强度的影响。从离体人磨牙中制取 184 个牙本质样本。一半样本（n=92）经人工酸蚀，另一半未经处理。对于两种处理后的牙本质，一半样本用 SnCl/AmF 预处理，另一半不做处理。处理后的样本用 Clearfil SE Bond 或 Scotchbond Universal 黏接剂黏接后，测量微拉伸黏结强度（TBS）。24 h 或 1 年后进行黏结失败模式检测和 EDX 分析。采用方差分析对 TBS 结果进行统计学分析（ = 0.05）。TBS 明显受牙本质基底（酸蚀牙本质<非酸蚀牙本质）和储存时间（24 h<1 年； < 0.0001）影响，但不受 SnCl/AmF 预处理和黏接剂系统影响。主要的黏结失败模式是牙本质-黏接剂界面的黏结失败。Sn 的含量一般低于检测下限。SnCl/AmF 预处理对酸蚀牙本质的短期和长期黏结强度没有影响。1 年后储存时黏结强度降低，对酸蚀牙本质的黏结强度低于非酸蚀牙本质，两种黏接剂系统间的黏结强度相似。
