Synthes 208.418 6.5mm Cannulated Screw 16mm Thread 115mm

Synthes 6.5mm Cannulated Screw | 16mm Thread | 115mm Length | 208.418

The Synthes 208.418 is a high-load internal fixation implant designed for the stabilization of major fractures in large bone structures. As a 6.5mm diameter cannulated screw, it features a 2.9mm central core designed for precise placement over a pre-positioned 2.8mm guide wire. This system is the clinical standard for "percutaneous" or minimally invasive techniques, allowing the surgeon to confirm anatomical alignment via fluoroscopy before the screw is advanced.

The 16mm Short Thread configuration is specifically engineered to provide a powerful lag effect. By ensuring the threads engage only the distal fragment while the smooth 4.8mm proximal shaft sits in the near fragment, the screw head draws the bone pieces together, generating high-pressure interfragmentary compression.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 208.418

• Material: 316L Stainless Steel (Surgical Grade)

• Screw Diameter: 6.5 mm

• Thread Profile: 16 mm Short Thread (Partial)

• Screw Length: 115 mm (Extended Reach)

• Cannulation: 2.9 mm (Compatible with 2.8 mm Guide Wires)

• Core Diameter: 4.5 mm

• Head Type: 7.9 mm Head with 4 mm Hexagonal Socket

• Quantity: Individually Packaged (Non-Sterile)

Technical & Clinical Advantages

• Guide-Wire Controlled Precision: The cannulated design allows for "over-the-wire" insertion. Once the guide wire trajectory is verified, the screw follows the wire exactly, eliminating the risk of "wandering" in dense cancellous bone—a critical factor in femoral neck fixation.

• Maximum Lag Compression: The 16mm thread length is optimized for "lagging" large fragments. Because the threads do not cross the fracture line into the proximal bone, the screw acts as a mechanical vice, pulling the distal fragment toward the head to close the fracture gap.

• Self-Drilling & Self-Tapping Tip: The distal tip features high-efficiency cutting flutes that allow the screw to be inserted directly over the guide wire in most cancellous bone applications, reducing operative steps and anesthesia time.

• High-Torque Hex Drive: The 4.0mm hexagonal recess provides the structural integrity required to transmit the high torque levels necessary for deep insertion (115mm) into the femoral neck or pelvis without stripping the head.

• 316L Stainless Steel Biocompatibility: Forged for high fatigue resistance, the material is designed to withstand the significant cyclic loads associated with weight-bearing in the femur and tibia during the healing process.

Applications

• Hip Surgery: Fixation of femoral neck fractures (intracapsular) where an extended 115mm reach is required for tall or large-framed patients.

• Pelvic & Acetabular Trauma: Stabilization of sacroiliac (SI) joint disruptions and vertical shear fractures.

• Knee Trauma: Compression of large tibial plateau or distal femoral condyle fractures.

• Ankle Arthrodesis: Large-joint fusions requiring massive compressive force across the joint space.

Condition & Quality Assurance

• Status: NEW — Original Manufacturer's Packaging.

• Integrity: This implant is new. As a non-sterile component, it must be inspected for thread integrity and processed through a validated sterilization cycle (typically steam autoclaving) in accordance with hospital protocols and Synthes IFU (Instructions for Use) prior to clinical use in 2026.

• Professional Standards: With over 25 years of experience in surgical hardware, Primis Medical ensures all large-fragment implants are maintained in optimal conditions to preserve the mechanical and sterile integrity of the system.

Shipping & Handling

• Secure Logistics: Shipped in reinforced packaging to ensure the precision-ground 6.5mm threads and internal cannulation remain pristine and unobstructed.

• Fast Dispatch: Ships within 1 business day.