Our 4.5mm Malleolar Screw is a specialized orthopedic implant engineered for the precise fixation of ankle fractures, particularly those involving the medial malleolus. Combining a smooth, unthreaded shank with a deep, sharp cancellous thread profile, this screw acts as a highly efficient lag screw. It generates powerful interfragmentary compression across fracture lines to optimize stability and promote rapid bone healing.
Designed with a self-tapping, trochar-shaped tip, it easily cuts its own path through dense cortical bone into the soft cancellous bone of the distal tibia. The low-profile round head features a deep internal hexagonal drive socket that ensures positive driver engagement, maximizing torque transmission while significantly reducing the risk of screw-head stripping.
Key Features & Benefits
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Advanced Self-Tapping Tip: Features a precision-engineered cutting tip that minimizes the need for pre-tapping, streamlining the surgical procedure.
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Dynamic Interfragmentary Compression: The partially threaded configuration allows the smooth shank to slide through the near fragment, tightly compressing the bone fragments together.
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Deep Cancellous Threads: Optimized thread pitch and depth provide exceptional pull-out resistance inside porous or soft metaphyseal bone structures.
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High-Torque Hexagonal Drive: A deep, precision-machined internal hex socket eliminates driver slippage (cam-out), allowing for controlled, confident insertion.
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Premium Biocompatible Materials: Fabricated from superior-grade Titanium Alloy or Stainless Steel to offer exceptional fatigue strength and eliminate adverse biological reactions.
Technical Specifications
| Feature | Specification |
| Screw Diameter | 4.5mm |
| Drive Type | Hexagonal (Hex) Socket |
| Thread Type | Cancellous (Deep profile with large pitch) |
| Thread Configuration | Partially Threaded (Lag screw functionality) |
| Tip Design | Self-Tapping / Trochar Tip |
| Material Options | Titanium Alloy (Ti-6Al-4V) / Medical Grade Stainless Steel (316L) |
| Length Range | Available in standard trauma sizes (e.g., 25mm to 80mm) |
| Sterilization | Shipped Non-Sterile (Autoclavable) |
Clinical Indications
The 4.5mm Malleolar Screw is primarily indicated for:
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Fixation of medial malleolus fractures of the ankle joint.
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Fixation of posterior malleolus fractures.
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Distal tibia fractures involving the articular or metaphyseal surface.
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Fixation of large bone fragments where an unthreaded shank is required to cross a fracture line for compression.
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