The Accuracy of Computer Image-Guided Template for Mandibular Angle Ostectomy

Area of Science:

• Oral and Maxillofacial Surgery
• Medical Imaging
• Surgical Navigation

Background:

• Mandibular angle ostectomy (MAO) is a common procedure for prominent mandibular angles.
• Intraoral MAO presents challenges due to limited surgical field visibility.
• Enhanced precision and safety are crucial for successful MAO outcomes.

Purpose of the Study:

• To develop and evaluate a computer image-guided surgical template for mandibular angle ostectomy.
• To assess the accuracy and clinical efficacy of this novel navigation technique.
• To improve pre-surgical planning and intraoperative manipulation during MAO.

Main Methods:

• A novel computer image-guided surgical template system was designed and fabricated using 3D printing.
• Bilateral MAO was performed on nine patients with prominent mandibular angles using the template guidance.
• Post-operative accuracy was evaluated using 3D curve functions and shell-to-shell deviations.

Main Results:

• High intra-class correlation coefficients (ICC) indicated excellent agreement between simulated and post-operative mandibular contours (0.958-0.965).
• Mean maximal shell-to-shell deviations were minimal, measuring 2.02 ± 0.32 mm on the right and 1.97 ± 0.41 mm on the left.
• All patients reported high satisfaction with their cosmetic results.

Conclusions:

• The computer image-guided surgical template system demonstrates high accuracy and reliability for MAO.
• This technique offers a valuable tool for improving pre-surgical planning and intraoperative precision.
• The novel navigation method contributes to safer and more effective mandibular angle ostectomy procedures.