Digital orthodontic extrusion system for complex crown-root fracture of anterior teeth: A technique report

Ao Sun; Xiaoyan Feng; Li Chen; Xinhua Gu

doi:10.1016/j.prosdent.2023.02.011

Digital orthodontic extrusion system for complex crown-root fracture of anterior teeth: A technique report

J Prosthet Dent. 2023 Mar 22:S0022-3913(23)00121-X. doi: 10.1016/j.prosdent.2023.02.011. Online ahead of print.

Authors

Ao Sun¹, Xiaoyan Feng², Li Chen³, Xinhua Gu⁴

Affiliations

¹ 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.
² Attending Faculty, Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang, Hangzhou, PR China.
³ Associate Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.
⁴ Professor, Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang, Hangzhou, PR China. Electronic address: 610964127@qq.com.

PMID: 36964046
DOI: 10.1016/j.prosdent.2023.02.011

Abstract

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.