Screws
Screws
Screws (/skruːz/; from Old French escroue) are a type of Fastener used in many applications, including Orthopedic surgery and Dental implants. They are typically made of Stainless steel or Titanium, and are designed to hold objects together or to position objects.
Etymology
The word "screw" comes from the Old French escroue, which means "nut". This term was used to describe the female part of a fastener, which the male part (the screw) is inserted into.
Types of Screws
There are many types of screws used in medical applications, including:
- Bone screw: A type of screw used in orthopedic surgery to fix bones together.
- Cortical screw: A screw used to fix fractures of the cortex, the outer layer of the bone.
- Cancellous screw: A screw used to fix fractures of the cancellous bone, the spongy inner layer of the bone.
- Interference screw: A screw used in ligament reconstruction surgery.
- Lag screw: A screw used to compress fracture fragments together.
- Pedicle screw: A screw used in spinal surgery.
Related Terms
- Fastener: A device that mechanically joins or affixes two or more objects together.
- Orthopedic surgery: The branch of surgery concerned with conditions involving the musculoskeletal system.
- Dental implants: A surgical component that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, facial prosthesis or to act as an orthodontic anchor.
- Stainless steel: An alloy of iron with a minimum of 10.5% chromium which produces a thin layer of oxide on the surface that prevents further corrosion.
- Titanium: A chemical element with the symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density, and high strength.
External links
- Medical encyclopedia article on Screws
- Wikipedia's article - Screws
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