Department of Orthodontics, School of Dentistry, Aichi-Gakuin University, 2-11 Suemori-dori, Chikusa-ku, Nagoya 464-8651, Japan.
Dent Mater J. 2011;30(5):664-71. doi: 10.4012/dmj.2010-168. Epub 2011 Sep 23.
For the development of new orthodontic elastic material, 1-butanol was added to PEMA-TA/HX resin. In the present study, basic experiments to reveal the mechanical properties of the materials were conducted. FT-IR spectroscopy showed that addition of 1-butanol did not cause any chemical changes to the PEMA-TA/HX resin. After addition of 1-butanol to PEMA-TA/HX resin, the modulus of elasticity, instantaneous modulus elasticity, retarded elasticity and viscosity were lowered in a concentration-dependent manner, whereas the elastic strain was increased in a concentration-dependent manner. Moreover, on the application of heat a shape-memory effect was observed. These results suggest that the modulus of elasticity of this material can be adjusted. Additionally, this material has the ability to restore force as a function of its shape-memory effect in cases of plastic deformation at the insertion of appliances. This new orthodontic elastic material has the potential to be clinically effective in orthodontic treatment.
为了开发新的正畸弹性材料，将 1-丁醇添加到 PEMA-TA/HX 树脂中。本研究进行了基本实验以揭示材料的机械性能。FT-IR 光谱表明，添加 1-丁醇不会引起 PEMA-TA/HX 树脂发生任何化学变化。将 1-丁醇添加到 PEMA-TA/HX 树脂中后，弹性模量、瞬时弹性模量、延迟弹性和粘度均呈浓度依赖性降低，而弹性应变呈浓度依赖性增加。此外，在施加热量时观察到形状记忆效应。这些结果表明可以调节该材料的弹性模量。此外，这种材料具有作为形状记忆效应的功能，在器械插入时发生塑性变形的情况下，能够恢复力。这种新型正畸弹性材料在正畸治疗中具有潜在的临床效果。
