Liu Chao, Huang Qin, Feng Bin, Ye Guanchen, Wang Yu, Zhu Tianer, Wu Junjie, Lin Lining, You Dongqi, Yang Haiping, Zhang Weifang
Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, 310000, China.
Zhejiang Provincial Clinical Research Center for Oral Diseases, Hangzhou, 310000, China.
Sci Rep. 2025 Jan 20;15(1):2523. doi: 10.1038/s41598-025-85459-4.
Direct resin restoration has been widely used to restore the tooth defect for its convenience and minimal invasion. However, the accuracy of the final contour of class II restoration is often unpredictable and quite technique-sensitive due to the limitation of traditional matrix band system. In this study, the authors developed a novel matrix band system using shape memory polymer (SMP), which possessed two reversible shapes including digitized permanent shape to reproduce anatomical proximal contour and programmable temporary shape for clinical practice and reservation. The permanent shape could be designed and customized in software or retrieved from imaging database collected from large general population. Only warm saline or water was needed to trigger the shape transformation without any auxiliary tools. The results of in vitro class II restoration showed the shape memory matrix bands brought the best proximal profile and contact point, compared to traditional metal matrix and sectional matrix. The novel shape memory matrix system represents the comfortable, precise, and minimally invasive trend of dentistry and has a broad industrialization prospect as a dental instrument.
直接树脂修复因其便利性和微创性已被广泛用于修复牙齿缺损。然而，由于传统的成形片夹系统的局限性，Ⅱ类修复最终外形的准确性往往难以预测，且对技术相当敏感。在本研究中，作者开发了一种使用形状记忆聚合物（SMP）的新型成形片夹系统，该系统具有两种可逆形状，包括用于再现解剖学邻面外形的数字化永久形状以及用于临床操作和保存的可编程临时形状。永久形状可以在软件中设计和定制，也可以从从大量普通人群收集的影像数据库中获取。仅需温盐水或水即可触发形状转变，无需任何辅助工具。体外Ⅱ类修复的结果表明，与传统金属成形片和分段成形片相比，形状记忆成形片夹带来了最佳的邻面外形和接触点。这种新型形状记忆成形片系统代表了牙科舒适、精确和微创的发展趋势，作为一种牙科器械具有广阔的产业化前景。
