Difference between revisions of "X-ray of Hansson pins"
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| + | ==Planning== | ||
| + | Frontal and lateral projections. | ||
| + | |||
| + | ==Post-operative evaluation== | ||
| + | [[File:X-ray of Hansson pins with contact points.jpg|thumb|Support points]] | ||
| + | The pins should be at least 2 cm apart on frontal projection, and have <10° angle compared to each other. | ||
| + | ===Support points=== | ||
| + | For proper support, both pins should have support by the subchondral plate and the lateral cortex. In addition, the middle of the inferior pin should be supported by the medial cortex, and the middle of the posterior pin should have support from the medial cortex, with less than <5 mm distance from subchondral bone.<ref name=ToplicMellner>{{cite web|url=http://www.ortobas.se/lih-spikning/|title=LIH-spikning (Hansson Pin)|author=Marsel Toplić, Carl Mellner|website=ortobas.se}}</ref> | ||
| + | |||
| + | ===Fracture alignment=== | ||
| + | "No misalignment" means:<ref name=ToplicMellner/> | ||
| + | *Dislocation of less than 2 mm | ||
| + | *0-15° valgus | ||
| + | *Dorsal tilt of <10° | ||
| + | |||
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Revision as of 15:24, 12 December 2018
Author:
Mikael Häggström [notes 1]
Contents
Planning
Frontal and lateral projections.
Post-operative evaluation
File:X-ray of Hansson pins with contact points.jpg
Support points
The pins should be at least 2 cm apart on frontal projection, and have <10° angle compared to each other.
Support points
For proper support, both pins should have support by the subchondral plate and the lateral cortex. In addition, the middle of the inferior pin should be supported by the medial cortex, and the middle of the posterior pin should have support from the medial cortex, with less than <5 mm distance from subchondral bone.[1]
Fracture alignment
"No misalignment" means:[1]
- Dislocation of less than 2 mm
- 0-15° valgus
- Dorsal tilt of <10°
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ 1.0 1.1 Marsel Toplić, Carl Mellner. LIH-spikning (Hansson Pin). ortobas.se.
