A headless compression screw is an orthopedic internal fixation implant that provides interfragmentary compression without leaving any hardware profile above the bone surface. Unlike conventional bone screws, the Harbat Screw sits fully recessed within bone after insertion. This makes it particularly well-suited for fixation near articular surfaces, where a protruding head could cause impingement or irritate surrounding soft tissue.
Sami’s Instruments offers this screw in premium German stainless steel and titanium to support reliable fixation in appropriate small bone and periarticular applications.
How the Compression Mechanism Works
The screw generates compression through a differential thread pitch between its leading (tip) and trailing (top) threads. As the surgeon drives the screw in, the leading thread engages the far fragment first. Once the trailing thread begins to engage the near cortex, the difference in pitch draws the two fragments together, creating compression across the fracture site. Because the head sits flush with or beneath the bone surface, surgeons can use this screw in areas where hardware prominence is a significant concern — including near joint surfaces.
Common Orthopedic Applications
Orthopedic surgeons use headless compression screws across a range of small bone and periarticular procedures. Based on documented use in the orthopedic literature, common applications include:
- Scaphoid fractures and nonunions
- Intra-articular and periarticular fractures of the carpals, metacarpals, tarsals, and metatarsals
- Small joint arthrodeses
- Fractures of the radial styloid, ulnar styloid, and patella
- Osteotomies and bunionectomies involving small bones
This screw is not appropriate for all fracture types. A qualified orthopedic surgeon should determine the right indication and implant based on the patient’s individual anatomy and clinical condition.
Materials and Specifications
| Specification | Details |
|---|---|
| Product | Headless Compression Screw (Harbat Screw) |
| Material | Premium German stainless steel / Titanium |
| Top Thread Length | 4, 5, 6, 7, 8, 9, 10, 12, 14, 16 mm |
| Bottom Thread Length | 4, 5, 6, 7, 8, 9, 10, 12, 14, 16 mm |
| Overall Length | 10–50 mm |
Key Features
- Zero-profile fixation — the screw sits fully within bone, so it leaves no hardware prominence at the surface
- Differential thread pitch — actively draws bone fragments together during insertion to generate compression
- Independent thread-length options — top and bottom thread lengths are each available in 10 sizes, giving surgeons precise control over fit
- Wide overall length range — lengths from 10 to 50 mm cover a broad range of small bone geometries
- Dual material options — available in both German stainless steel and titanium to match different surgical and patient requirements
Summary
In short, the Harbat Headless Compression Screw combines a flush-profile design with differential-pitch compression threading to support stable fixation in appropriate small bone and periarticular procedures. Furthermore, its broad sizing range — with top and bottom thread lengths each available in 10 configurations and overall lengths from 10 to 50 mm — gives surgeons meaningful flexibility. The screw is available in premium German stainless steel and titanium, making it a practical option for a variety of orthopedic fixation applications.
ISO, CNC, Chamber of Commerce & Surgical Instruments Manufacturers Association Certification Images – Sami’s Instruments
Write a Review