The University Münster Model Surgery System for Orthognathic Surgery. Part II -- KD-MMS.

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Technology

Background:

• Model surgery is crucial for orthognathic surgery planning.
• Traditional methods involve cutting dental casts, which is destructive.
• The KD-MMS system offers a non-destructive alternative using standardized spacer plates.

Purpose of the Study:

• To develop and evaluate a system for non-destructive dental cast separation in orthognathic surgery.
• To enable three-dimensional displacements without cutting plaster casts.
• To integrate 2D cephalometric planning values into the model surgery process.

Main Methods:

• Evaluation of various articulator types for compatibility with the KD-MMS.
• Development of utilities to facilitate maxillary displacement.
• Utilizing red spacer and blue mounting plates for controlled movement and cast separation.

Main Results:

• The KD-MMS system includes specific hardware (red spacers, blue mounting plates) and a procedure.
• It allows for 8mm three-dimensional movements without damaging plaster casts.
• The system facilitates repeatable model surgeries and restoration of the pre-surgical state.

Conclusions:

• The KD-MMS system improves the efficiency and accuracy of model surgery and gnathologic splint construction.
• It enables evaluation of different surgical approaches on the same casts.
• Significant chair time reduction is achievable, particularly when comparing surgical options.