Product Overview
The Glenojet® Allograft System was created to replace and augment anterior glenoid bone loss associated with trauma, recurrent dislocation or unstable shoulder. It eliminates the procedural steps and surgical time associated with autograft bone harvesting and preparation and is a great alternative to a latarjet procedure.
The cortical bone graft is available in two sizes and is designed to match the curvature and surface of the existing glenoid. The single-use, disposable instrument system includes a drill guide for screw channel and graft orientation, a reamer for preparing the surface of the glenoid rim, and a depth gauge for the screws. The pre-drilled screw holes accept standard 3.5mm cortical bone screws (non-cannulated screws are preferred). The graft is made of human cortical bone, harvested from the distal femur or proximal tibia. The articulating surface is highly polished for smooth articulation. Pre-drilled suture holes allow the surgeon to pass sutures from either side allowing soft tissue to be attached intra or extra-articularly. Should the surgeon choose to use the conjoined tendon to achieve the sling effect, it may be attached extra-articularly to the graft using sutures passed through the pre-drilled holes. Grafts are supplied from an AATB approved facility, low dose gamma irradiated and provided sterile in saline with a shelf life of 5 years at room temperature.
Glenojet® Features
• Pre-shaped, pre-drilled human cortical allograft reduces operative and prep time
• Cortical bone allograft is available in two sizes; standard and large
• Pre-drilled holes eliminates preparation fractures and improves suture management
• Single-use, disposable and sterile instruments for a quick and reproducible technique
• Drill guide facilities accurate screw placement and glenoid rim alignment
• Glenoid reamers create a congruent surface to optimize glenoid to graft interface
• Suture holes allow intra or extra-articular soft tissue fixation
• Sling effect can still be achieved without the need for dissecting the coracoid
• All allografts are terminally sterilized using a Gamma Irradiation with a dose ≥8 kGyto obtain a minimum 10-6 Sterility Assurance Level (SAL), ensuring patient safety
Advantages for the Patient
• HemiCAP® technology was designed so patients can continue working and retain an active lifestyle without compromising future treatments.
• Preserves native anatomy
• Eliminates the need for bone harvesting and associated risks
• Shorter operating time
• Precision instrumentation and pre-shaped graft provide a fit that is a line-to-line, continuous extension of the existing articular surface
Advantages for the Surgeon
• Significantly reduces operative and preparation time
• Eliminates risks associated with coracoid harvest
• Allows sling attachment using conjoined tendon
• Provides a smooth and excellent line-to-line anatomic fit
• Off-the-Shelf graft and instruments are provided sterile
• Pre-drilled suture holes allow intra or extra-articular soft tissue fixation
• Reamer creates a precise and reproducible cut plane to expedite glenoid preparation
• Drill guide facilitates anatomic screw and graft placement
• Pre-drilled holes eliminate the risk of graft drilling fractures
Surgical Technique
Use Drill Guide to locate graft position on anterior glenoid surface. Position Drill Guide central to inferior aspect of glenoid so that the convex distal surface of the Drill Guide conforms to the glenoid articular surface. Place tip of first Guide pin into the Drill Guide and advance Guide Pin into bone to the depth of the etch mark using a cannulated powered drill. Repeat for second Guide Pin. Introduce Reamer over first Guide Pin and advance under power until the Reamer depth stop makes contact with the proximal end of the Guide Pin. Repeat for second Guide Pin. Position the Glenojet® Graft so that both Guide Pins pass through the pre-drilled holes in the Glenojet® Graft and the concave surface of the Glenojet® Graft is continuous with the surface of the native glenoid. Remove inferior Guide Pin. Determine appropriate length 3.5mm Cortical Bone Screw (not supplied) to engage posterior cortex of glenoid thru the pre-drilled holes in the Glenojet® Graft and along the pilot hole created by the Guide Pin. Deliver the inferior 3.5mm Cortical Bone Screw. Repeat for the superior screw location. Confirm graft and screw final position radiographically. (https://www.arthrosurface.com)
