Synthes 214.818 4.5MM Cortex Screw Self Tapping 18MM

Synthes 4.5mm Cortex Screw | Self-Tapping | 18mm Length | 214.818

The Synthes 214.818 is a heavy-duty internal fixation screw designed for use in dense cortical bone. As a 4.5mm diameter screw with a 18mm length, it is a core component of the Synthes Large Fragment System. This screw is engineered to provide maximum stability in diaphyseal bone, making it the clinical standard for treating fractures of the femur, tibia, and humerus where robust mechanical anchorage is required.

The specialized self-tapping distal tip features sharp cutting flutes that carve a precise thread path as the screw is advanced into a pre-drilled pilot hole. This streamlines the surgical workflow by eliminating the separate tapping step, which reduces operative time and minimizes the risk of thermal injury to the bone.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 214.818

• Material: 316L Stainless Steel (Surgical Grade)

• Screw Diameter: 4.5 mm

• Thread Profile: Self-Tapping

• Screw Length: 18 mm

• Core Diameter: 3.0 mm

• Head Type: 3.5 mm Hexagonal Socket

• Quantity: Individually Packaged, Sterile

Technical & Clinical Advantages

• Self-Tapping Efficiency: The distal cutting flutes allow for direct insertion after drilling the initial 3.2mm pilot hole. This ensures a high-tolerance "interference fit" between the screw threads and the cortical bone, providing immediate mechanical stability.

• Large Fragment Power: The 4.5mm diameter provides significantly higher pull-out strength and shear resistance compared to small fragment systems, making it suitable for weight-bearing bones.

• Optimized Cortical Pitch: The fine thread pitch is specifically designed for high-density cortical bone, maximizing surface area contact to prevent hardware loosening.

• High-Torque Hex Drive: The 3.5mm hexagonal recess is designed to transmit the high levels of torque required to seat a large fragment screw into thick cortex without stripping the head.

• 316L Stainless Steel Biocompatibility: Cold-worked for high fatigue resistance, the material is biologically inert and designed to withstand the cyclic loads of functional rehabilitation in the lower and upper extremities.

Applications

• Trauma Surgery: Fixation of diaphyseal fractures in the femur, tibia, and humerus.

• Plate Fixation: Serving as a "neutralization" or "tension band" screw when used through 4.5mm LC-DCP (Limited Contact Dynamic Compression Plates) or LCP (Locking Compression Plates).

• Pelvic Reconstruction: Ideal for stabilizing fractures of the pelvic ring and acetabulum where 4.5mm hardware is indicated.

• Osteotomy Fixation: Securely maintaining bone alignment in corrective reconstructive procedures of the lower limb.

Condition & Quality Assurance

• Status: NEW — Factory Sealed & Sterile.

• Integrity: This implant is securely packaged within its original manufacturer's sterile peel-pouch. The packaging is intact, ensuring the product's sterility, material integrity, and full lot traceability for clinical implantation in 2026.

• Professional Standards: With over 25 years of experience in orthopedic technology, Primis Medical ensures all Synthes implants are stored in climate-controlled environments to maintain the structural and sterile integrity of the hardware.

Shipping & Handling

• Secure Logistics: Shipped in protective packaging to ensure the sterile barrier remains uncompromised and the self-tapping flutes remain sharp.

• Fast Dispatch: Ships within 1 business day.