Matrix Wave System for Mandibulo-Maxillary Fixation-Just Another Variation on the MMF Theme? Part I: A Review on the Provenance, Evolution and Properties of the System.

Study Design: The advent of the Matrix Wave System (Depuy-Synthes)-a bone-anchored Mandibulo-Maxillary Fixation (MMF) System-merits closer consideration because of its peculiarities.

Objective: This study alludes to two preliminary stages in the evolution of the Matrix Wave MMF System and details its technical and functional features.

Results: The Matrix Wave System (MWS) is characterized by a smoothed square-shaped Titanium rod profile with a flexible undulating geometry distinct from the flat plate framework in Erich arch bars. Single MWS segments are Omega-shaped and carry a tie-up cleat for interarch linkage to the opposite jaw. The ends at the throughs of each MWS segment are equipped with threaded screw holes to receive locking screws for attachment to underlying mandibular or maxillary bone. An MWS can be partitioned into segments of various length from single Omega-shaped elements over incremental chains of interconnected units up to a horseshoe-shaped bracing of the dental arches. The sinus wave design of each segment allows for stretch, compression and torque movements. So, the entire MWS device can conform to distinctive spatial anatomic relationships. Displaced fragments can be reduced by in-situ-bending of the screw-fixated MWS/Omega segments to obtain accurate realignment of the jaw fragments for the best possible occlusion.

Conclusion: The Matrix Wave MMF System is an easy-to-apply modular MMF system that can be assembled according to individual demands. Its versatility allows to address most facial fracture scenarios in adults. The option of "omnidirectional" in-situ-bending provides a distinctive feature not found in alternate MMF solutions.