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Craniomaxillofacial
Fig 5 0.8 mm gold curved L-plate.
Fig 6 0.8 mm gold curved L-plate.
Fig 7 Complete orthognatic skull.
Fig 8 Complete set of plates and screws.
Fig 10 Genioplasty plate.
Fig 9 Plate module.
Fig 11 Instrument tray.
This new system offers one standard screw diameter for all orthognathic indications both in the midface and mandible and consequently only one screwdriver blade is needed for all screws. In addition, some of the plates are reversible and can be used on both the right and left sides allowing for a significant reduction of the implant inventory. The maxillary L-plates, as well as the BSSO-plate, show etched lines in 1 mm increments providing visual aid for plate bending and adaptation with the desired movement in mind. The color-coding of the implants in the matrix orthognathic system helps to identify the strength of the implant. The color-coding scale for plates and screws conforms to the matrix system strength color-coding scheme. Screws The matrix orthognathic system offers one screw diameter (1.85 mm) for all orthognathic indications: depending on the individual surgeon’s preference; these are either self-tapping (blue) or self-drilling (purple) screws. They have a coarse pitch for bicortical placement, as well as improved retention, and are available in 4–8 mm length (0.6 mm thread pitch) and 10–18 mm (1.0 mm thread pitch). 2.1 mm self-tapping (pink) emergency screws, 1.5 mm self-tapping (bronze) and 1.5 mm self-drilling (silver) are also available on request for specific indications or for surgeon’s preference. All screws are made of titanium alloy (Ti-6Al-7Nb). The standard 1.5 mm diameter screw (known to many surgeons) from the matrix midface system is also compatible with the plates in the matrix orthognathic system. Plates The matrix orthognatic system also offers a variety of plates for bone fixation in LeFort I as well as bilateral sagittal split osteotomy (BSSO) procedures. Three different plate thicknesses are available: • 0.5 mm thick plates (blue) • 0.7 mm thick plates (pink) • 0.8 mm thick plates (gold) The low profile L-plates come as 90° versions with either two or three holes on each side and anatomical version with a bend in the bar. As mentioned earlier, they are reversible so they can be used on either side of the patient and have etched lines in 1 mm increments which allow for determining the achieved bone advancement. Additionally, in order to address the request for prebent (anatomical) plates for maxillary fixation, 0.8 mm plates with the third leg offset between 2 mm and 10 mm are included in the system.