Synthes 4.5mm Cannulated Screw | Partially Threaded | 46mm | 214.546

The Synthes 214.546 is a high-precision internal fixation implant engineered for stable anchorage and active compression in cancellous and metaphyseal bone. As a 4.5mm diameter screw with a 46mm length, it is a versatile component of the Synthes 4.5mm Cannulated Screw System.

The cannulated design allows the screw to be accurately guided over a 1.6mm guide wire, ensuring a precise trajectory—a critical requirement for percutaneous applications or when navigating complex anatomical corridors. The partially threaded configuration is specifically engineered to create a "lag effect," providing interfragmentary compression as the distal threads engage the far fragment while the smooth proximal shaft glides through the near fragment.

Key Specifications

• Manufacturer: Synthes (DePuy Synthes)

• Model / REF: 214.546

• Material: 316L Surgical Stainless Steel

• Diameter: 4.5 mm

• Overall Length: 46 mm

• Thread Type: Partially Threaded

• Core Diameter: 2.7 mm

• Shaft Diameter: 3.1 mm

• Head Diameter: 6.5 mm

• Drive Type: 3.5 mm Large Hexagonal Socket

• Features: Self-Drilling, Self-Tapping, Cannulated

• Quantity: 1 Each (Individually Packaged)

Technical & Clinical Advantages

• Optimized Lag Compression: The partially threaded design ensures that all threads reside in the far fragment for most medium-bone applications. As the screw is tightened, the 6.5mm head draws the near cortex toward the far fragment, creating high-tension compression across the fracture line.

• Guided Accuracy: The internal cannulation facilitates percutaneous or open placement over a guide wire. This allows the surgeon to verify wire position via fluoroscopy before the screw is seated, reducing operative time and technical error.

• Self-Drilling & Self-Tapping: The distal tip is engineered with cutting flutes that eliminate the need for separate drilling and tapping steps in most cancellous bone applications, preserving bone stock and streamlining the surgical workflow.

• High-Torque Hex Drive: The 3.5mm hexagonal socket provides a robust interface for high-torque insertion into dense bone without the risk of head stripping or "cam-out."

• 316L Stainless Steel Biocompatibility: Forged from cold-worked surgical steel, the 214.546 is biologically inert and offers the high fatigue resistance required for early functional mobilization.

Applications

• Ankle & Foot Surgery: Fixation of medial malleolar fractures, calcaneal osteotomies, and subtalar fusions.

• Hand & Wrist: Stabilization of carpal fusions or distal radius fragments where a 3.5mm screw lacks sufficient shear strength.

• Pediatric Orthopedics: Precise fixation of epiphyseal fractures (Salter-Harris types) where guided placement is essential to avoid growth plate damage.

• Large Fragment Supplemental Fixation: Used as a standalone lag screw in various metaphyseal fractures of the humerus, tibia, or distal fibula.

Condition & Quality Assurance

• Status: NEW — Factory Sealed.

• Integrity: This implant is unused and maintains its original material integrity. The 1.6mm internal bore is verified clear for smooth guide wire passage.

• Sterilization Note: This device is typically provided as a NON-STERILE implant. 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 implantation in 2026.

• Professional Standards: With over 25 years of experience in orthopedic logistics, Primis Medical ensures all Synthes implants are stored and handled to preserve their mechanical and chemical precision.

Shipping & Handling

• Secure Logistics: Shipped in protective packaging to ensure the 46mm shaft remains perfectly aligned and the threads remain factory-sharp.

• Fast Dispatch: Ships within 1 business day.