A Herbert screw is an instrument used in the internal fixation of an unstable scaphoid fracture. It is a headless screw with the thread along its entire length. The two halves of the screw have a different pitch though, which causes compression of the fracture.
Unstable scaphoid fractures which include:
- ineffective in long standing non-united scaphoid fractures
- 1. Parajuli NP, Shrestha D, Dhoju D et-al. Scaphoid fracture: functional outcome following fixation with Herbert Screw. Kathmandu Univ Med J (KUMJ). 2012;9 (36): 267-73. Pubmed citation