Synthes 214.822 4.5mm Cortex Screw Self-tapping 22mm

Synthes 4.5mm Cortex Screw | Self-Tapping | 22mm Length | 214.822

The Synthes 214.822 is a high-load internal fixation implant engineered for secure anchorage in dense cortical bone. As a 4.5mm diameter screw with a 22mm length, it is a foundational component of the Synthes Large Fragment System. This screw is designed to provide maximum structural stability in diaphyseal bone, making it the primary choice for treating fractures of the femur, tibia, and humerus.

The self-tapping distal tip features precision-machined cutting flutes that carve a matching thread path as the screw is advanced into a $3.2\text{mm}$ pilot hole. This eliminates the need for a separate tapping step, significantly reducing operative time and maintaining high tactile feedback during insertion in dense bone.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 214.822

• Material: 316L Stainless Steel (Surgical Grade)

• Screw Diameter: 4.5 mm

• Thread Profile: Self-Tapping / Fully Threaded

• Screw Length: 22 mm

• Thread Pitch: 1.75 mm

• Core Diameter: 3.0 mm

• Head Type: 8.0 mm Head with Large Hexagonal Socket

• Quantity: Individually Packaged (Non-Sterile)

Technical & Clinical Advantages

• Optimized Cortical Pitch: The $1.75\text{mm}$ thread pitch is specifically calibrated for the dense mineral matrix of cortical bone. This geometry maximizes surface area contact, providing the high pull-out resistance required for large-bone stabilization.

• Self-Tapping Efficiency: By integrating cutting flutes into the screw tip, this implant reduces the number of surgical steps. It allows for direct insertion following the drill pass, which is particularly beneficial in trauma scenarios where reducing anesthesia time is critical.

• High-Torque Hex Drive: The large hexagonal socket is designed to transmit the significant torque required to seat a 4.5mm screw into thick cortical walls without the risk of "cam-out" or stripping the screw head.

• Universal Plate Compatibility: The 8.0mm spherical head is precisely engineered to sit flush within the counter-sunk holes of Synthes DCP (Dynamic Compression Plates), LC-DCP (Limited Contact), and the non-locking portion of Large Fragment LCP Combi-holes.

• 316L Stainless Steel Biocompatibility: Forged for high fatigue strength, the material is biologically inert and designed to withstand the massive cyclic loads associated with the early stages of weight-bearing rehabilitation.

Applications

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

• Plate Fixation: Serving as a "neutralization" or "compression" screw when used through 4.5mm large fragment plating systems.

• Malunion/Non-union Repairs: Providing robust mechanical stabilization in revision surgeries where high-strength hardware is mandatory.

• Tension Band Wiring: Used as an anchor point for tension band constructs in patellar or olecranon fractures.

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 316L steel.

Shipping & Handling

• Secure Logistics: Shipped in protective packaging to ensure the precision-machined 4.5mm threads and hexagonal socket remain pristine.

• Fast Dispatch: Ships within 1 business day.