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Registration strategy using occlusal splint based on augmented reality for mandibular angle oblique split osteotomy.

Ming Zhu, Gang Chai, Yan Zhang

The Journal of Craniofacial Surgery

|October 1, 2011

Summary

Augmented reality (AR) with ARToolKit successfully guided mandibular osteotomy in 15 patients. This technology precisely overlaid surgical plans onto patient models, improving accuracy in complex jaw surgeries.

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Area of Science:

Medical Technology
Surgical Navigation
Computer-Assisted Surgery

Background:

Augmented reality (AR) tools enable superimposition of imaging scans (CT/MRI) onto real anatomy for navigated surgery.
This feasibility study explored ARToolKit for defining cutting planes in mandibular angle oblique split osteotomy.

Purpose of the Study:

To assess the feasibility and effectiveness of using augmented reality (AR) for mandibular angle oblique split osteotomy.
To evaluate the integration of ARToolKit with rapid prototyping and occlusal splints for surgical planning.

Main Methods:

A surgical plan was overlaid onto a 3D-printed mandible model using ARToolKit.
Computed tomography (CT) scans and dental casts informed the creation of patient-specific occlusal splints with markers.

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A laser scanner and specialized software (Rapidform) integrated the marker, splint, and CT data to create a virtual surgical model.

Main Results:

The ARToolKit system was successfully implemented in 15 patients undergoing mandibular angle oblique split osteotomy.
The virtual surgical plan, including cutting planes, accurately overlaid the physical mandible model during surgery.

Conclusions:

Augmented reality (AR) offers a novel and effective approach for mandibular angle oblique split osteotomy.
Occlusal splints serve as a robust registration method for AR in surgery.
AR tools show promise for enhancing control in maxillary translocation during orthognathic surgery.