Sun Ao, Feng Xiaoyan, Chen Li, Gu Xinhua
Attending Faculty, Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang, Hangzhou, PR China; Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, PR China.
Attending Faculty, Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang, Hangzhou, PR China.
J Prosthet Dent. 2024 Dec;132(6):1123.e1-1123.e8. doi: 10.1016/j.prosdent.2023.02.011. Epub 2023 Mar 22.
Patients with traumatic dental injuries commonly present in clinical practice with complex crown-root fractures. Prosthodontic treatment of such patients may be unsuccessful because of the violation of the supracrestal tissue attachment, making their management challenging. Minor tooth movement is an effective solution to extruding the residual root but may require referral to an orthodontist. The purpose of this technique was to present a digital orthodontic system including a 3-dimensional virtual patient technique, a computer-aided design and computer-aided manufacture (CAD-CAM) resin facial veneer-retained pontic, and a zirconia post as an orthodontic appliance for tooth extrusion in the esthetic zone. This veneered pontic may also serve as an interim prothesis. The appliance provides a precise design for the direction and extent of orthodontic extrusion.
临床上，创伤性牙损伤患者常伴有复杂的冠根折。由于龈上组织附着遭到破坏，这类患者的修复治疗可能会失败，这使得其治疗颇具挑战性。轻微的牙齿移动是将残根挤出的有效方法，但可能需要转诊给正畸医生。本技术的目的是展示一种数字正畸系统，该系统包括三维虚拟患者技术、计算机辅助设计和计算机辅助制造（CAD-CAM）树脂贴面固位桥体以及氧化锆桩，作为在美观区域进行牙齿挤出的正畸矫治器。这种贴面桥体也可用作临时修复体。该矫治器为正畸挤出的方向和程度提供了精确设计。
