基于形状记忆聚合物的4D打印隐形矫治器材料及其制备方法和应用、4D打印隐形矫治器

本发明提供了一种基于形状记忆聚合物的4D打印隐形矫治器材料及其制备方法和应用、4D打印隐形矫治器，属于高分子聚合物材料技术领域。本发明的4D打印隐形矫治器材料由包括以下质量份数的原料制得：聚酯多元醇100～500份、异氰酸酯400～800份、扩链剂400～800份、1‑乙烯基‑2‑吡咯烷酮200～4800份、光引发剂5～35份、阻聚剂1～15份。本发明的4D打印隐形矫治器材料是一种具有形状记忆性能的隐形矫治器材料，利用聚氨酯的交联结构与氢键网络结构赋予该材料优异的形状记忆性能，可在口腔温度范围内发生形状记忆响应，最终以形状回复力实现对牙齿施加缓释持久的轻力，从而大幅提高矫治效率。

The present invention belongs to the technical field of high-molecular polymer materials, and provides a 4D-printed invisible orthodontic appliance material based on shape-memory polymers, as well as its preparation method, application, and 4D-printed invisible orthodontic appliances. The 4D-printed invisible orthodontic appliance material of the present invention is prepared from raw materials including the following parts by mass: 100–500 parts of polyester polyol, 400–800 parts of isocyanate, 400–800 parts of chain extender, 200–4800 parts of 1-vinyl-2-pyrrolidone, 5–35 parts of photoinitiator, and 1–15 parts of polymerization inhibitor. This material is a type of orthodontic material with shape-memory properties. The cross-linked structure and hydrogen-bonded network of polyurethane impart excellent shape-memory performance to the material, enabling it to undergo shape-memory responses within the oral temperature range. Ultimately, it applies slow-release, long-lasting gentle forces to teeth via shape recovery force, thereby significantly improving orthodontic efficiency.