Proximal radial joint orientation line
Proximal radial joint orientation line
- Acronym: PRJOL
Definition
The proximal radial joint orientation line is a landmark used to assess angular deformities of the radius and provide indications for their correction.
In the sagittal plane, the proximal radial joint orientation line is determined from a mediolateral radiograph or multiplanar reconstruction of the radius/ulna: it is the line connecting the proximocranial part of the head of the radius to the proximocaudal part of the head of the radius.
In the frontal plane, the proximal radial joint orientation line is determined from a craniocaudal radiograph or multiplanar reconstruction of the radius/ulna. It is the line connecting the proximomedial part of the medial coronoid process of the ulna to the proximolateral part of the head of the radius. If these points are not clearly identified, the most distalomedial and distalolateral edges of the condyle of humerus can be used.
References
Fox J, Tomlinson JL. Principles of Angular Limb Deformity Correction. In: Tobias KM, Johnston SA, editors. Veterinary Surgery Small Animal. St Louis (MI): Elsevier Saunders; 2012. p.657-668.
Fox et al. (2006). Principles of Uniapical and Biapical Radial Deformity Correction Using Dome Osteotomies and the Center of Rotation of Angulation Methodology in Dogs. Veterinary Surgery;35:67–77. doi:10.1111/j.1532-950X.2005.00114.x
Kwon et al. (2022). Evaluation of the radial procurvatum using the center of rotation of angulation methodology in chondrodystrophic. Dogs Front Vet Sci; 8:774993. doi: 10.3389/fvets.2021.774993
