Computer-guided rapid-prototyped templates for segmental mandibular osteotomies: a preliminary report

Area of Science:

• Maxillofacial Surgery
• Biomedical Engineering
• Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM)

Background:

• Segmental mandibular resection poses challenges in reconstruction plate contouring, symmetry restoration, and condylar positioning.
• Accurate restoration is crucial for functional and aesthetic outcomes in maxillofacial surgery.

Purpose of the Study:

• To present a novel CAD/CAM technique utilizing patient-specific templates for mandibular reconstruction.
• To evaluate the accuracy and efficacy of these templates in guiding osteotomies and maintaining condylar position.

Main Methods:

• Development of patient-specific templates using CAD/CAM for prebending reconstruction plates, guiding osteotomies, and repositioning the condylar process.
• Application of the technique in two patients undergoing segmental mandibular resection.

Main Results:

• Templates demonstrated excellent passive fit and accurately guided surgical cuts.
• The technique successfully restored mandibular symmetry and repeatable occlusion.
• Postoperative imaging showed minimal deviation (mean 0.9 mm) from preoperative condylar position and accurate resection margins (mean 1.17 mm deviation from planned).

Conclusions:

• An innovative computer-guided template facilitates accurate mandibular resection and condylar positioning.
• The technique shows promise for improving outcomes in segmental mandibular resection.
• Further studies with larger patient cohorts and template design modifications are recommended.