Ling Long, Chen Yulin, Malyala Raj
Glidewell Dental, Irvine, CA 92612, USA.
Polymers (Basel). 2024 Feb 21;16(5):581. doi: 10.3390/polym16050581.
The degree of monomer conversion and polymerization shrinkage are two of the main reasons for potential adhesion failure between the tooth structure and the restoration substrate. To evaluate the degree of conversion and polymerization shrinkage of a newly developed self-adhesive resin cement, the degree of conversion (DC) was measured using FTIR under different activation modes, temperatures, and times. Volumetric shrinkage was tested using the AcuVol video imaging method. The experimental cement showed a higher DC than other cements under self-curing. The DC of the experimental cement was higher than that of other cements, except SpeedCem Plus under light curing. The experimental cement had a higher DC than other cements, except SpeedCem Plus in some conditions under dual curing. All self-adhesive cements had a higher DC at 37 °C than at 23 °C under self-curing, and there was no statistical difference between 23 °C and 37 °C under light curing. All self-adhesive cements showed a significantly higher DC at 10 min than at 5 min under self-curing. There was no statistical difference between 5 min and 10 min for most cements under dual curing. All self-adhesive cements statistically had the same volumetric shrinkage under light curing and self-curing. The newly developed self-adhesive resin cement exhibited a higher degree of conversion and similar volumetric shrinkage compared to these commercial self-adhesive resin cements.
单体转化率和聚合收缩率是导致牙体结构与修复基底之间潜在粘结失败的两个主要原因。为评估一种新开发的自粘结树脂水门汀的转化率和聚合收缩率，在不同的活化模式、温度和时间条件下，使用傅里叶变换红外光谱仪（FTIR）测量转化率（DC）。采用AcuVol视频成像法测试体积收缩率。实验性水门汀在自固化条件下的转化率高于其他水门汀。除了光固化条件下的SpeedCem Plus外，实验性水门汀的转化率高于其他水门汀。在双重固化的某些条件下，除SpeedCem Plus外，实验性水门汀的转化率高于其他水门汀。在自固化条件下，所有自粘结水门汀在37℃时的转化率高于23℃，而在光固化条件下，23℃和37℃之间没有统计学差异。在自固化条件下，所有自粘结水门汀在10分钟时的转化率显著高于5分钟时。在双重固化条件下，大多数水门汀在5分钟和10分钟之间没有统计学差异。在光固化和自固化条件下，所有自粘结水门汀的体积收缩率在统计学上相同。与这些市售自粘结树脂水门汀相比，新开发的自粘结树脂水门汀表现出更高的转化率和相似的体积收缩率。
