Matrix Midface System

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Matrix Midface System

The new matrix midface plate and screw system is intended for use in selective trauma of the midface and craniofacial skeleton; craniofacial surgery; reconstructive procedures; and selective orthognatic surgery of the maxilla and chin. One of the main intentions was to make the system flexible and easy to use.

The system offers a full range plate selection for NOE, ZMC, LeFort I, and a variety of other craniofacial indications made out of commercially pure titanium. Four thicknesses are available: 0.4mm (silver), 0.5mm (blue), 0.7 mm (pink), and 0.8mm (gold). The color coding designates the plate strength.

MatrixMIDFACE 1.3 Line Extension, April 2021

In April 2021, the MatrixMIDFACE System was expanded with new 1.3 and 1.5 mm plates and screws. Read more in the "Details" tab below.

Details
Clinical Cases
Disclaimer

To make the system more user friendly and simple it is designed in a way that all screws work with all plates within the entire set. Moreover only one screwdriver blade is necessary as it works for all screws within the system.

The screws are available in 3mm to 18mm lengths. They also have a color coding to distinguish between self-drilling (silver), self-tapping (bronze), and emergency (blue) designs. In comparison to the existing set, the major advantages include a recess for improved screw driver retention and reduced cam-out, and faster insertion due to the 0.60 mm thread pitch design. All screws in the set are made out of titanium alloy (Ti-6Al-7Nb).

Other improvements are the reduced plate/screw profile and the self retaining screws/blades allowing for easier screw/blade re-engagement and reduced screw cam-out. The edges on the plates are rounded to avoid soft tissue damage. A reduced overall plate and screw profile has been achieved.

The standardized instrumentation makes the matrix midface system more efficient and helps reducing inventory for hospitals without compromising clinical solutions.

As with every AO product, the matrix midface system has been tested at a large number of sites before achieving AO approval. When compared to existing sets, those surveyed reported the new system to be much easier to use and found the consolidation of product that the Matrix system offers to be an important step forward. Additionally, the screw/plate profile and screw insertion/retention were found to be significantly better in comparison to the existing 1.5mm system.

MatrixMIDFACE 1.3 Line Extension

Daniel Buchbinder, Nils-Claudius Gellrich, Gerson Mast, Damir Matic, Alf L Nastri

The MatrixMIDFACE System has been expanded with the new plates 1.3 and 1.3 mm screws

In April 2021, the new 1.3 and 1.5 mm plates and screws are aligned with the Matrix concept providing low profile plates and screws in a modular system with a wide range of plate shapes and screw options for fracture fixation. The new 1.3 mm screws (existing Matrix Screws are 1.55 mm in thread diameter) have allowed the distance between the screw holes in the plates 1.3 to be significantly reduced, providing more fixation options in the smaller plates (Fig 1). The 1.3 mm screws are not compatible with the existing Matrix plates 1.5 designed for 1.55 m screws and vice versa. The instrumentation for both Matrix Systems is identical. A smaller 1.0 mm drill bit, required for the 1.3 mm screws, has been included from the COMPACT Midface System. With the inclusion of new plates and screws, the MatrixMIDFACE System supersedes the COMPACT Midface System and offers implants in a range of sizes and shapes suitable for a variety of applications.

Fig 1: Top view indicating the screw hole distances: new Adaption Plate 1.3, 8 hole (dark blue); Adaption Plate 1.5, 8 hole (light blue).

Fig 2: Lateral view of new 1.3 mm plate with 1.3 mm screw (left); 1.5 mm plate with 1.5 mm screw (right).

Fig 1ab
Treatment of zygomatic fracture with matrix midface plates.

Case images courtesy of Scott P Bartlett, Philadelphia, US

Fig 2ad Highly comminuted panfacial fracture.

Fig 2ad Highly comminuted panfacial fracture (continued).

Case images courtesy of Scott P Bartlett, Philadelphia, US

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