快速原型技术辅助制作牙颌光弹模型方法的建立

A new method of fabricating photoelastic model by rapid prototyping

目的:探讨快速原型技术辅助制作牙颌光弹模型的方法。方法:采用计算机三维重建结合快速原型技术,加工制作口腔光弹模型的阳模,通过常规印模翻制浇注成形法,制作包含下颌牙列的下颌骨光弹模型。结果:所制得的整个颌骨光弹模型各组成部分在几何形态和大小上与原型比接近1:1;模型中牙体、牙槽骨和牙周膜的弹性模量比与实际组织的弹性模量比基本一致;通过光弹仪对模型进行观察,该模型内部初始应力小,光学灵敏度高。结论:快速原型技术辅助制作的牙颌光弹模型,能很好地满足光弹实验的要求,为口腔光弹模型提供了新的设计和制作方法。

PURPOSE： To explore a novel method of fabricating the photoelastic model using rapid prototyping technique.METHODS： A mandible model was made by rapid prototyping with computerized three-dimentional reconstruction,then the photoelastic model with teeth was fabricated by traditional impression duplicating and mould casting.RESULTS： The photoelastic model of mandible with teeth,which was fabricated indirectly by rapid prototyping,was very similar to the prototype in geometry and physical parameters.The model was of high optical sensibility and met the experimental requirements.CONCLUSION： Photoelastic model of mandible with teeth indirectly fabricated by rapid prototyping meets the photoelastic experimental requirements well.