The Paragon 28® Silverback™ Straddle Ankle Fusion Plating System was designed to supplement the Phantom® Hindfoot TTC/TC Nail allowing surgeons to create a plate and nail construct for tibiotalocalcaneal (TTC) or tibiocalcaneal (TC) arthrodesis. The Straddle Plate includes 12 plates and allows for an anterior, lateral, or posterior approach.
Both the anterior and posterior plates include two forms, a flat and contoured version to help accommodate variations in anatomy. The lateral plates are available in flat TC and TTC versions. All plates have a transitional thickness to ensure the plates are thickest where subjected to the most stress and taper proximally and distally to limit soft tissue irritation and potential for a stress riser.
The hole sizing allows for Silverback™ Ø4.5 mm and Ø5.2 mm screws to be used in the tibia and calcaneus, while the talar screw holes allow for Gorilla® R3CON Ø3.5 mm and Ø4.2 mm screws. A Ø4.7 mm “Compact” screw is available for the hole sizes in the tibia and calcaneus, which was designed with a smaller thread height to help reduce insertion torque in dense bone. Additionally, single lead bone threads result in a decreased pitch differential between the locking screw head and bone threads to reduce the amount of insertion torque required to lock the Compact screw into the plate in areas of dense bone.
All plate screws have the option to drill on-axis using the Straight / EZ Cone Guide or to drill off-axis up to 15°. The Phantom Hindfoot TTC/TC Nail should be inserted prior to the Straddle Plate placement. The relatively wider plate design accommodates the Phantom TTC/TC Nail which helps evenly distribute force across the construct and guard against stress shielding during healing.
A robust offering of joint preparation instrumentation is offered in the Silverback™ case and tray to address TT and TTC arthrodesis. Joint preparation instrumentation includes an array of cartilage removal tools, curettes, osteotomes, burrs, perforators, and bone fenestration chisels.