What size screw for scaphoid?
The surgeon must be aware of the screw properties to optimize scaphoid fracture fixation. We recommend using a screw with a diameter of 3.9 mm or less with 1-mm increments and available in lengths up to 30 mm to minimize the risk of screw prominence without compromising screw length and fixation strength.
What is Acutrak?
Acumed developed Acutrak® screw technology to provide a headless compression-holding solution to fix fractures. It features the first fully threaded bone screw with a continuously variable thread pitch along the entire length of the screw.
What are Acutrak screws made of?
The Acutrak 2 Standard headless compression screw has an hourglass shape and is composed of titanium alloy. Head diameter is 2.8 mm while the tail diameter is 4.7 mm.
What is a compression screw?
Background. The Headless Compression Screw® (HCS) is a cannulated screw that is used for scaphoid fracture fixation. The screw generates compression across the fracture site prior to being countersunk below the articular surface.
How big is a scaphoid?
The length of the scaphoid ranged from 25.9 to 34.5mm with a mean of 30.3±2.9mm. In males the mean length was 32.7±1.7mm while that in females was 27.3±0.6mm (p<0.01).
How big is the scaphoid bone?
The width of the bone was compared with diameters of commercially available screws. Results: When measured along an axis from proximal pole to the distal articular surface, male scaphoids (31.3 mm +/- 2.1) were significantly longer than female specimens (27.3 mm +/- 1.7).
How does the arthrex FT compression screw provide compression?
at the tip of the screw enters the bone faster than each trailing thread, compressing the fragments progressively as the screw is advanced. and extra-articularly with minimal risk of impingement or soft-tissue irritation. insertion after drilling and facilitate efficient OR time.
What type of screws are used in surgery?
Surgical screws are made of titanium or a high-grade surgical stainless steel. The sizes can span across 1.5 mm to 7.3mm depending on the type of fracture. Some people have misconceptions about the use of screws in the body. The screws do not set off metal detectors because they are non-magnetic.
What is a cancellous screw?
Orthopedics A screw with relatively coarser thread and often with a smooth, unthreaded portion, which allows it to act as a lag screw and to anchor in soft medullary bone.
What artery supplies scaphoid?
The major blood supply to the scaphoid is via the radial artery. Seventy to eight percent of the intraosseous vascularity and the entire proximal pole is from branches of the radial artery entering through the dorsal ridge.