A cone-beam CT based technique to augment the 3D virtual skull model with a detailed dental surface

doi:10.1016/j.ijom.2008.11.006

International Journal of Oral and Maxillofacial Surgery

Volume 38, Issue 1, January 2009, Pages 48-57

https://doi.org/10.1016/j.ijom.2008.11.006 Get rights and content

Abstract

Cone-beam computed tomography (CBCT) is used for maxillofacial imaging. 3D virtual planning of orthognathic and facial orthomorphic surgery requires detailed visualisation of the interocclusal relationship. This study aimed to introduce and evaluate the use of a double CBCT scan procedure with a modified wax bite wafer to augment the 3D virtual skull model with a detailed dental surface. The impressions of the dental arches and the wax bite wafer were scanned for ten patient separately using a high resolution standardized CBCT scanning protocol. Surface-based rigid registration using ICP (iterative closest points) was used to fit the virtual models on the wax bite wafer. Automatic rigid point-based registration of the wax bite wafer on the patient scan was performed to implement the digital virtual dental arches into the patient's skull model. Probability error histograms showed errors of ≤0.22 mm (25% percentile), ≤0.44 mm (50% percentile) and ≤1.09 mm (90% percentile) for ICP surface matching. The mean registration error for automatic point-based rigid registration was 0.18 ± 0.10 mm (range 0.13–0.26 mm). The results show the potential for a double CBCT scan procedure with a modified wax bite wafer to set-up a 3D virtual augmented model of the skull with detailed dental surface.

Section snippets

Material and methods

The combination of a double CBCT scan procedure with a modified wax bite wafer was evaluated on 10 patients who attended for a routine orthognathic surgical work-up in the Division of Maxillo-Facial Surgery, General Hospital St-Jan Bruges, Bruges.

For each patient, a modified wax bite wafer was prepared with Delar Bite-Registration wax (Delar Corp, Lake Oswego, USA) (Fig. 1). The horseshoe wax bite wafer with a posterior extension was shaped after heating the wax in a thermostatically controlled

Results

A total of 26,337 ± 3411 (range: 20,672–32,169) and 21,550 ± 3011 (range 17,304–27,315) Euclidean distances were calculated in mm to define the accuracy of ICP surface matching of the impressions of the virtual upper and lower dental arches on the modified wax bite wafer. Probability error histograms showed errors ≤0.16 mm (25% percentile), ≤0.34 mm (50% percentile) and ≤0.97 mm (90% percentile) for surface matching of the upper dental arches and ≤0.22 mm (25% percentile), ≤0.44 (50% percentile) and

Discussion

Inaccurate visualization of the interocclusal relationship owing to streak artefacts and limited resolution MSCT scanning remains the major drawback of 3D virtual planning of orthognathic surgery and facial orthomorphic surgery. Different procedures have been reported in the literature to integrate a precise dental model into 3D milled33, 38, 65, 76, stereolithographic⁶² and computerized17, 55 models of the skull. Gateno and coworkers17, 18, 19, 83, 84 were the first to report a clinical

Acknowledgments

The authors thank Pieter De Groeve, Tinne Van Delm and Kevin Suetens (Medicim NV, Sint-Niklaas, Belgium; www.medicim.com) for their dedication and support. The authors also thank Jeff Koerber MD, LDS and Kristof Berquin MD, LDS for their help.

Source of support: This work was partially supported by the Flemish government by grant IWT-040310.

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Research PaperOrthognathic SurgeryA cone-beam CT based technique to augment the 3D virtual skull model with a detailed dental surface

Abstract

Section snippets

Material and methods

Results

Discussion

Acknowledgments

Am J Orthod Dentofacial Orthop

Am J Orthod Dentofacial Orthop

J Oral Maxillofac Surg

J Oral Maxillofac Surg

J Oral Maxillofac Surg

Am J Orthod Dentofacial Orthop

Int J Oral Maxillofac Surg

Am J Orthod Dentofacial Orthop

Oral Surg Oral Med Oral Pathol Oral Radiol Endod

J Craniomaxillofac Surg

Oral Surg Oral Med Oral Pathol Oral Radiol Endod

Am J Orthod Dentofacial Orthop

Oral Surg Oral Med Oral Pathol Oral Radiol Endod

Int J Oral Maxillofac Surg

Otolaryngol Head Neck Surg

J Endod

J Craniomaxillofac Surg

J Endod

Am J Orthod Dentofac Orthop

Int J Oral Maxillofac Surg

J Oral Maxillofac Surg

Eur J Radiol

Am J Orthod Dentofacial Orthop

Atlas Oral Maxillofac Surg Clin N Am

J Oral Maxillofac Surg

Br J Oral Maxillofac Surg

A three-dimensional evaluation of the upper airway in adolescents

Orthod Craniofac Res

Accuracy of proximal caries depth measurements: comparison between limited cone beam computed tomography, storage phosphor and film radiography

Caries Res

Cone beam computerized tomography-based dental imaging for implant planning and surgical guidance. Part 1: Single implant in the mandibular molar region

J Oral Implantol

Development of a compact computed tomographic apparatus for dental use

Dentomaxillofac Radiol

Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay): system configuration and physical properties

Dentomaxillofac Radiol

Bone density assessments of dental implant sites: 2. Quantitative cone-beam computerized tomography

Int J Oral Maxillofac Implants

Using a flat-panel detector in high resolution cone beam CT for dental imaging

Dentomaxillofac Radiol

Using three-dimensional imaging to assess treatment outcomes in orthodontics: a progress report from the University of the Pacific

Orthod Craniofac Res

Superimposition of 3D cone-beam CT models of orthognathic surgery patients

Dentomaxillofac Radiol

Cone beam volume tomography: a new digital imaging option for dentistry

J Calif Dent Assoc

3D volume imaging for dentistry: a new dimension

J Calif Dent Assoc

Three-dimensional visualization of the craniofacial patient: volume segmentation, data integration and animation

Orthod Craniofac Res

Precision of transfer of preoperative planning for oral implants based on cone-beam CT-scan images through a robotic drilling machine

Clin Oral Implants Res

Conventional CT and cone beam CT for improved dental diagnostics and implant planning

Dent Implantol Update

State-of-the-art on cone beam CT imaging for preoperative planning of implant placement

Clin Oral Investig

Application of limited cone beam computed tomography to clinical assessment of alveolar bone grafting: a preliminary report

Cleft Palate Craniofac J

Comparison of image performance between cone-beam computed tomography for dental use and four-row multidetector helical CT

J Oral Sci

Research Paper
Orthognathic Surgery
A cone-beam CT based technique to augment the 3D virtual skull model with a detailed dental surface