Comparison of two computer-assisted surgery techniques to guide a mandibular distraction osteogenesis procedure....

Area of Science:

• Oral and Maxillofacial Surgery
• Biomedical Engineering
• Medical Imaging

Background:

• Accurate mandibular distraction is crucial for facial bone displacement.
• Preoperative assessment, surgical planning, and technique significantly impact outcomes.
• Intraoral devices offer potential for guiding mandibular distraction procedures.

Purpose of the Study:

• To evaluate and compare two distinct techniques for guiding mandibular distraction surgery using an intraoral device.
• To assess the feasibility and reliability of a stereolithographic template versus a computer-assisted surgery (CAS) unit.

Main Methods:

• The study utilized a fresh cadaver model.
• 3D reconstructions from computed tomographic (CT) scans informed planning for both techniques.
• Technique 1: Customized stereolithographic template. Technique 2: Computer-assisted surgery (CAS) unit for osteotomy and distractor placement.
• Both methods were planned and compared using identical 3D software.

Main Results:

• The accuracy of both evaluated techniques for mandibular distraction was found to be comparable for clinical applications.
• The stereolithographic template technique demonstrated a more satisfactory outcome compared to the CAS unit.
• Both methods were assessed for feasibility and reliability in guiding the surgical procedure.

Conclusions:

• Both stereolithographic templates and CAS units are feasible and reliable for guiding mandibular distraction surgery.
• The rapid prototyping stereolithographic template technique appears to be a more satisfactory approach for clinical use.
• Further clinical evaluation may be warranted to confirm the superiority of the template technique.