Reproducibility and reliability of digital occlusal planning for orthognathic surgery

Almadi, D., Benington, P., Ju, X. and Ayoub, A. (2023) Reproducibility and reliability of digital occlusal planning for orthognathic surgery. International Journal of Oral and Maxillofacial Surgery, 52(10), pp. 1074-1080. (doi: 10.1016/j.ijom.2023.03.001) (PMID:36941160)

Abstract

The digital articulation of dental models is gradually replacing the conventional physical approach for occlusal prediction planning. This study was performed to compare the accuracy and reproducibility of free-hand articulation of two groups of digital and physical dental models, 12 Class I (group 1) and 12 Class III (group 2). The models were scanned using an intraoral scanner. The physical and digital models were independently articulated 2 weeks apart by three orthodontists to achieve the maximum inter-digitation, with coincident midlines and a positive overjet and overbite. The occlusal contacts provided by the software color-coded maps were assessed and the differences in the pitch, roll, and yaw were measured. The reproducibility of the achieved occlusion of both the physical and digital articulation was excellent. The z-axis displayed the smallest absolute mean differences of 0.10 ± 0.08 mm and 0.27 ± 0.24 mm in the repeated physical and repeated digital articulations, respectively, both in group 2. The largest discrepancies between the two methods of articulation were in the y-axis (0.76 ± 0.60 mm, P = 0.010) and in roll (1.83° ± 1.72°, P = 0.005). The overall measured differences were< 0.8 mm and< 2°. Despite the steep learning curve, digital occlusal planning is accurate enough for clinical applications.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ju, Dr Xiangyang and Ayoub, Professor Ashraf and Benington, Mr Philip
• Authors: Almadi, D., Benington, P., Ju, X., and Ayoub, A.
• College/School: College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Dental School
• Journal Name: International Journal of Oral and Maxillofacial Surgery
• Publisher: Elsevier
• ISSN: 0901-5027
• ISSN (Online): 1399-0020
• Published Online: 21 March 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in International Journal of Oral and Maxillofacial Surgery 52(10):1074-1080
• Publisher Policy: Reproduced under a Creative Commons License