Rhode Island care since 1976
Prosthetic Legs Explained: Types, Fit, and How They Stay On
Learn how prosthetic legs are chosen, four common amputation-level types, socket suspension methods, and how prostheses differ from orthoses.
Quick answers to common prosthetic leg questions
There is no single best prosthetic leg for everyone. Four common amputation-level terms are transtibial (below-knee leg), transfemoral (above-knee leg), transradial (below-elbow arm), and transhumeral (above-elbow arm). Prosthetic legs commonly connect through a custom socket and an individually selected suspension system; an orthosis supports or assists a body part that is present.
Frequently asked questions
- Who makes the best prosthetic legs?
There is no single best prosthetic leg or manufacturer for everyone. The right choice depends on individual socket fit, health needs, activity goals, comfort, and the care and follow-up available. Ask a qualified prosthetist to explain options for your situation.
- What are the four types of prosthesis?
Four commonly discussed limb levels are transtibial (below-knee leg), transfemoral (above-knee leg), transradial (below-elbow arm), and transhumeral (above-elbow arm). This is a useful summary, not an exhaustive or universal list; prostheses also serve partial-foot and other levels.
- How do fake legs stay on?
Prosthetic legs commonly use a custom-fitted socket and a suspension method, such as a locking pin and liner, a sleeve, suction or vacuum, or a design that uses the person’s anatomy for support. A prosthetist selects and fits the system for the individual.
- What's the difference between orthosis and prosthesis?
A prosthesis replaces a missing body part. An orthosis is an external device that supports, aligns, protects, or assists a body part that is present—for example, an ankle-foot orthosis (AFO).