Kakaboura A I, Eliades G C, Palaghias G
Research Center for Biomaterials, Athens, Greece.
J Dent. 1996 May;24(3):223-31. doi: 10.1016/0300-5712(95)00058-5.
The aim of the present study was to evaluate the composition and the laboratory performance of three visible light-cured resinous liners (Cavalite, Ionoseal and Timeline).
Monomers were separated from fillers and were analysed by HPLC. Set pastes were analysed by FTIR spectroscopy and diametral strengths and water solubility were measured.
The monomers identified in the liners were BisEMA/2-HEMA (Cavalite), BisDMA/BisGMA (Ionoseal) and UEDMA (Timeline). Significant variations were found in the filler content but the mechanical response as assessed by the diametral tensile strength showed no statistical differences. The curing efficiency ranged from 24.2 to 31.0% (top surfaces) to 26.0-54.0% (bottom surfaces) of remaining C = C bonds. No positive correlations were found between curing efficiency and optical properties. The bond strength of the liners to dentine was negligible compared with that to composite. All the liners demonstrated extensive gap formation and debonding at the liner-dentine interfaces in marginal adaptation testing. Statistical differences were noticed in the water absorption and water solubility values of the products. Ionoseal showed extensive hydrolytic degradation compared with the other liners. No evidence of acid-base reaction was found in the set products.
本研究旨在评估三种可见光固化树脂衬层（Cavalite、Ionoseal和Timeline）的成分及实验室性能。
将单体与填料分离，采用高效液相色谱法进行分析。对固化后的糊剂进行傅里叶变换红外光谱分析，并测量其径向强度和水溶性。
在衬层中鉴定出的单体分别为双甲基丙烯酸乙二醇酯/甲基丙烯酸羟乙酯（Cavalite）、双甲基丙烯酸二缩三乙二醇酯/双酚A双甲基丙烯酸缩水甘油酯（Ionoseal）和二甲基丙烯酸脲烷酯（Timeline）。填料含量存在显著差异，但通过径向拉伸强度评估的机械响应无统计学差异。固化效率范围为剩余碳-碳双键的24.2%至31.0%（顶面）至26.0%至54.0%（底面）。未发现固化效率与光学性能之间存在正相关。与复合树脂相比，衬层与牙本质的粘结强度可忽略不计。在边缘适应性测试中，所有衬层在衬层-牙本质界面均表现出广泛的间隙形成和脱粘。产品的吸水率和水溶性值存在统计学差异。与其他衬层相比，Ionoseal表现出广泛的水解降解。在固化后的产品中未发现酸碱反应的证据。
