Synthes 219.931 Spiked Washer 8.0MM/3.2MM

Synthes Spiked Washer | 8.0mm Outer / 3.2mm Inner | 219.931

The Synthes 219.931 is a specialized orthopedic fixation accessory designed to enhance the purchase and distribution of compressive forces in delicate bone and soft-tissue reconstructions. Featuring an 8.0mm outer diameter and a 3.2mm inner hole, this washer is specifically engineered for use with 2.7mm and 3.5mm cortex screws.

The "spiked" geometry is a critical mechanical feature. The underside of the washer is populated with precision-machined micro-spikes that penetrate the cortical surface or soft tissue (such as ligaments or tendons). This prevents the "spinning" or migration of fragments during screw final-tightening and provides a high-friction interface that significantly increases pull-out resistance.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 219.931

• Material: 316L Stainless Steel (Surgical Grade)

• Outer Diameter: 8.0 mm

• Hole Diameter: 3.2 mm

• Profile: Spiked Underside / Low-Profile Top

• Compatibility: 2.7mm and 3.5mm Cortex/Cancellous Screws

• Quantity: 1 Each

Technical & Clinical Advantages

• Enhanced Rotational Stability: The peripheral spikes engage the bone surface, preventing the washer and any underlying soft tissue or small bone fragment from rotating as the screw is advanced. This is essential for maintaining anatomical reduction in "avulsion-type" fractures.

• Optimized Load Distribution: By expanding the surface area of the screw head from approximately 5.0mm to 8.0mm, the washer prevents the screw head from "sinking" into soft metaphyseal or osteoporotic bone, ensuring sustained compression over time.

• Soft-Tissue "Grip": In ligamentous repairs or tendon re-attachments, the spikes "bite" into the soft tissue, securing it firmly against the bone bed to facilitate biological healing and re-integration.

• Low-Profile Design: Despite the addition of spikes, the washer maintains a minimal vertical height to reduce hardware palpability and soft-tissue irritation in subcutaneous areas like the ankle or elbow.

• 316L Stainless Steel Biocompatibility: Forged from cold-worked surgical steel, the 219.931 is biologically inert and offers high fatigue resistance, essential for early functional mobilization.

Applications

• Avulsion Fracture Fixation: Stabilization of small bony fragments where a ligament or tendon has pulled away from the bone (e.g., Malleolar or Olecranon avulsions).

• Ligament Reconstruction: Anchoring graft materials or native ligaments directly to the bone surface.

• Metaphyseal Compression: Distributing load when using 3.5mm screws in spongy bone to prevent cortical "punch-through."

• Sports Medicine: Specialized procedures requiring robust soft-tissue-to-bone interface stability.

Condition & Quality Assurance

• Status: NEW — Individually Packaged.

• Integrity: This component is unused and maintains its original material integrity. The spikes are factory-sharp and free of deformations.

• Sterilization Note: This is typically provided as a NON-STERILE component. It must be properly cleaned and sterilized (standard steam autoclave) in accordance with validated hospital protocols and Synthes’ Instructions for Use (IFU) prior to clinical application in 2026.

• Professional Standards: With over 25 years of experience in orthopedic logistics, Primis Medical ensures all fixation hardware is stored in climate-controlled environments to preserve material properties.

Shipping & Handling

• Secure Logistics: Shipped in protective packaging to ensure the precision-machined spikes and washer geometry remain pristine.

• Fast Dispatch: Ships within 1 business day.