Herbert screw
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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.
Indications
Unstable scaphoid fractures include:
- displacement >1 mm
- scapholunate angle >60o
- radiolunate angle >15o
- delayed/non-union
Disadvantages
- ineffective in long
standing-standing non-united scaphoid fractures
-</ul><h4>Disadvantages</h4><ul><li>ineffective in long standing non-united scaphoid fractures</li></ul>- +</ul><h4>Disadvantages</h4><ul><li>ineffective in long-standing non-united scaphoid fractures</li></ul>
References changed:
- 1. Parajuli N, Shrestha D, Dhoju D, Shrestha R, Sharma V. Scaphoid Fracture: Functional Outcome Following Fixation with Herbert Screw. Kathmandu Univ Med J (KUMJ). 2011;9(36):267-73. <a href="https://doi.org/10.3126/kumj.v9i4.6342">doi:10.3126/kumj.v9i4.6342</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/22710536">Pubmed</a>
- 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. <a href="http://www.ncbi.nlm.nih.gov/pubmed/22710536">Pubmed citation</a><span class="ref_v3"></span>
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