02/12/2010
AO Technical Commission Approved

Matrix 5.5 Deformity and Matrix MIS

The matrix spine system is a universal set of instruments and implants that accommodates both open and minimally invasive surgery (MIS) approaches for deformity, degenerative, and trauma indications. The system is composed of pedicle screws, preassembled polyaxial pedicle screws, monoaxial screws, hooks, locking caps, transconnectors, rods, and polyaxial head implants.

The matrix 5.5 deformity spine system is designed to provide biomechanically sound results for complex posterior pathological challenges. The matrix polyaxial and monoaxial pedicle screw features dual-core, double-lead threads, threaded T25 StarDrive recesses, 50 of angulation with rod reduction features located at the top of the screw head. The matrix 5.5 deformity polyaxial heads can be removed and replaced intraoperatively without removing the bone screw. The 5.5 mm diameter rod material options include titanium, Ti-6Al-7Nb, and CoCr with multiple-length curved precontoured and hex-end versions.

Locking caps are square-thread design with a saddle on the underside to prevent skiving during rod reduction. The saddle is designed to pilot the locking cap to the screw head to minimize cross threading. The snap-on transconnector is a preassembled implant. It features an arched telescoping body. The jaws of the transconnector have the ability to swivel and are spring loaded for tension application until final tightening.

The matrix MIS is a minimally invasive instrument system for use with the matrix spine system. Matrix MIS allows for minimally invasive rod and screw insertion for thoracolumbar pedicle fixation. Pedicle trauma is minimized by using muscle-sparing approaches to expose patient anatomy.

This system uses cannulated pedicle screws attached to screw-mounted tissue retractors. This combination allows pedicle screw insertion and rod introduction with minimal tissue disruption. The system is applicable to single and multi-level procedures requiring posterior instrumentation.

Matrix MIS uses the same locking cap and pedicle screw technology as matrix 5.5 deformity and matrix degen.

The 5.5 minimally invasive rods are prelordosed with 100 mm or 200 mm bend radius. The 100 mm bend rods are available in 3585 mm lengths in 5 mm increments. The 200 mm bend rods are available in 60130 mm lengths in 5 mm increments.

Unique to matrix MIS are cannulated pedicle preparation instruments, screw-mounted tissue retractors, and a rod introduction instrument.

Cases provided by Roger Hrtl, New York, USA

 

PLIF Technique with Matrix MIS

Presentation of the minimally invasive technique for placing interbody cages. Indications and technical tips are presented.

Hazards and labeling

Due to varying countries’ legal and regulatory approval requirements, consult the appropriate local product labeling for approved intended use of the products described on this website. All devices on this website are approved by the AO Technical Commission. For logistical reasons, these devices may not be available in all countries worldwide at the date of publication. 


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