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Updated: Jun 13, 2025
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Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
Published on: August 5, 2021
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Fully digital occlusion planning in orthognathic surgery - A crossover study.
Bogomil Sabev1, Sead Abazi2, Raphael Patcas3
1Oral- and Cranio-Maxillofacial Surgery, Cantonal Hospital Aarau, Tellstrasse, 5001 Aarau, Switzerland; Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zürich, Switzerland.
Summary
Digital intraoral scans enable accurate virtual occlusion findings in orthognathic surgery, offering a reliable alternative to traditional methods for improved patient outcomes.
Area of Science:
- Oral and Maxillofacial Surgery
- Digital Dentistry
- Surgical Planning
Background:
- Orthognathic surgery corrects severe jaw malocclusions, enhancing chewing function and quality of life.
- Digitalization, through intraoral scanners and planning software, is transforming oral and maxillofacial surgery.
- Previous studies indicated virtual occlusion from digital scans approximates conventional methods using plaster models.
Purpose of the Study:
- To validate the accuracy of virtual occlusion findings using IPS CaseDesigner® software.
- To determine if intraoral scans alone are sufficient for precise virtual occlusion in orthognathic surgery planning.
Main Methods:
- A retrospective crossover study included 23 orthognathic surgery patients with intraoral scans.
- Two surgeons performed haptic occlusion on 3D stereolithographic models via a digital pathway.
- Conventional haptic occlusion served as the reference, with surgical accuracy defined as <2mm translation and <2° rotation.
Main Results:
- Virtual occlusion findings were significantly more accurate than the defined surgical accuracy (p < 0.001).
- Translational movements (0.37-0.51 mm) and rotations (0.71-1.09°) fell within the acceptable surgical accuracy range.
- Anterior/posterior translation (0.51 mm) and Yaw rotation (1.09°) showed the most significant differences.
Conclusions:
- The fully virtual workflow, incorporating intraoral scanning and virtual occlusion, is a reliable alternative.
- This digital approach represents a state-of-the-art method in orthognathic surgery.
- The findings support the exclusive use of intraoral scans for virtual occlusion in surgical planning.
