Intermediate
Technical
IVT
Screw Pullout
Mechanical failure where a screw loses purchase and withdraws from bone tissue.
Full Definition
Screw pullout is a mechanical complication in orthopedic surgery where a fixation screw loses its grip within bone tissue and migrates out of its original position. This failure typically occurs due to inadequate bone quality (osteoporosis), oversized pilot holes, inadequate screw length, or excessive loading before bone healing. Screw pullout can lead to loss of reduction, implant failure, and the need for revision surgery with alternative fixation methods.
Usage
Usage note: Distinguish from screw breakage or stripping in documentation.
In Context
- "Osteoporotic bone quality led to early screw pullout requiring revision surgery." — complication report
- "The patient experienced screw pullout three weeks post-operatively." — follow-up notes
Also known as
screw loosening
screw migration
Contrasted with
secure fixation
stable purchase
Don't confuse with
screw breakage
screw stripping