Concept GraFix Modular Bio-Interference Screw Tap | Model D8638 | 8.0 mm Working Diameter x 7-1/4 Inch (184 mm) Instrument Length | Cannulated Arthroscopic Bone Tunnel Threading Shaft

The ConMed Linvatec D8638 is a professional-grade, reusable, operating room-grade orthopedic instrument expertly engineered to prepare precise internal threads within a drilled bone tunnel prior to the insertion of corresponding bioabsorbable or biocomposite interference screws during cruciate ligament reconstructions (ACL/PCL). Part of the premium Concept GraFix Modular Universal Driver System and manufactured from high-tensile, corrosion-resistant surgical stainless steel, this 7-1/4 inch (184 mm) quick-connect shaft features an 8.0 mm outer thread profile optimized for threading tunnels intended for 10 mm and 11 mm BioScrew configurations. Designed with a central cannulation cavity to pass seamlessly over standard orthopedic guide wires, the D8638 incorporates highly visible etched depth markings along its working distal end to afford the sports medicine surgeon precise visual depth confirmation under active endoscopic fluid magnification, minimizing the physical risk of graft laceration or tunnel widening while delivering uniform, reproducible internal thread channels.

Technical Specifications

• Manufacturer: ConMed Corporation (Surgical Products Division, formerly branded as ConMed Linvatec)

• Product Brand Family: Concept GraFix Modular Universal Driver System / BioScrew Reusable Instruments

• Product Catalog Code (MPN): D8638 (Often referenced in procurement networks as SKU D8638-WE)

• Instrument Functional Classification: Modular Bio-Interference Screw Bone Tap Shaft

• Distal Working Diameter Sizing: 8.0 mm thread form profile

• Overall Tool Insertion Length: 7-1/4 inches (184 mm nominal alignment tracking)

• Pneumatic / Guide Wire Accommodation: Fully Cannulated center-bore structural core

• Proximal Hub Attachment Mechanism: Concept GraFix Quick-Connect male interface (Explicitly matched to the D8640 modular ratcheting handle system)

• Depth Verification Aids: High-contrast radial laser-etched depth bands on the tip geometry

• Material Composition: Premium-Grade German Surgical Stainless Steel

• Reusability / Processing Classification: Fully Reusable (Withstands repeated high-temperature pre-vacuum steam autoclave decontamination loops)

• Clinical Allocation Group: Knee Arthroscopy, Orthopedic Sports Medicine, Anterior/Posterior Cruciate Ligament (ACL/PCL) Reconstructions