Mechanical and leakage behaviour of the dentin-adhesive interface
Mechanical and leakage behaviour of the dentin-adhesive interface
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DOI：
10.1023/b:jmsm.0000021125.40282.ba
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发表时间：
2004-04-01
影响因子：
3.7
通讯作者：
Rengo, S
中科院分区：
文献类型：
--
作者：
Mollica, F;De Santis, R;Rengo, S
已经开发了牙本质粘结系统（DBS），以便在功能和完整性被恢复时将修复材料（即复合材料）粘结到组织的内壁。与牙本质的粘附是由于DBS渗透到由溶胀的胶原网络构成的脱矿物质基质中。修复牙的短期稳定性主要受牙体缺损的影响，而修复牙的长期稳定性主要受修复材料对牙体结构的封闭性的影响，为了确定材料界面的性质，采用微拉伸静态和动态试验分析了材料与牙本质的结合，通过有限元建模（FEM）和通过X射线计算机微断层扫描（micro-CT）辅助。研究了DBS复合材料层中的孔隙和孔隙率对应力分布的影响。在圆柱形试样上测量特定DBS的拉伸粘合强度。双能量吸收技术，与同步加速器光束，已被开发成调查，在一个非破坏性的方式，泄漏在牙本质-DBS界面的银硝酸盐染色溶液作为一个功能的机械循环。结果表明，渗漏发生径向通过牙本质粘接剂界面，并在粘接剂和复合材料层的孔隙率的影响。(C)2004 Kluwer Academic Publishers.
Dentine bonding systems (DBS) have been developed in order to bond restorative materials (i.e. composite) to the inner walls of the tissues when function and integrity as to be restored. Adhesion to dentine results from the penetration of DBS into the demineralised substrate constituted by a swollen collagen network. The short-term stability of a restored tooth is mainly affected by the presence of defects which act as stress raiser, while the long-term stability of a restored tooth is mainly affected by the seal of the restorative material on the dental structures.In order to determine the properties of the material interface, bonding to dentine is analysed using micro-tensile static and dynamic tests, assisted by the finite element modelling (FEM) and by the X-ray computed microtomography (micro-CT). The effect of voids and porosity in the composite layer of the DBS on the stress distribution has been investigated. Tensile adhesive strength for a particular DBS was measured on cylindrical specimens. The dual energy absorption technique, with the synchrotron beam light, has been developed to investigate, in a non-destructive manner, the leakage at the dentine-DBS interface of a silver nitrate staining solution as a function of mechanical cycling. The results indicate that leakage occurs radially through the dentine-adhesive interface and is influenced by the porosity in the adhesive and composite layers. (C) 2004 Kluwer Academic Publishers.