This paper focuses on the operative technique and planning behind externally correcting frontal-plane deformities of the knee using a proximal tibial osteotomy (PTO). The authors highlight that accurate correction in the coronal plane is vital to joint mechanics and long-term knee health when dealing with malalignment.
Indications & deformity analysis
The authors outline that PTO is indicated for significant extra-articular deformities of the lower limb but is generally not indicated in advanced osteoarthritis (except salvage). They emphasise the importance of analysing the origin of deformity (tibia vs femur vs joint line) and using parameters like the joint line convergence angle (JLCA) and mechanical axis deviation to inform surgical plans.
Pre-operative planning & technique
Pre-operative planning involves full-length standing radiographs, digital magnification, and applying methods like the Miniaci or Dugdale approach to determine correction angles. Surgical technique considerations include choice between medial opening-wedge vs lateral closing-wedge, preserving the posterior tibial slope, protecting neurovascular structures (posterior bundle), and avoiding hinge fractures.
Complications & postoperative management
Common complications identified are lateral hinge fractures and infection. The authors suggest early weight-bearing once consolidation is achieved and regular radiographic monitoring. Return to sport is possible post consolidation.
Clinical take-home messages
- Careful deformity localisation (tibial vs femoral) is essential for success.
- The technical execution must preserve biomechanics (slope, hinge integrity, alignment).
- PTO offers a robust option to correct frontal deformities when the indication is right and execution precise.
- Good outcomes depend on planning, technique and appropriate patient selection.
Link to full paper: Technique de correction des déformations frontales par ostéotomie tibiale proximale
Sources used in report overview:
- https://www.researchgate.net/publication/393766611_Technique_de_correction_des_deformations_frontales_par_osteotomie_tibiale_proximale
- https://em-consulte.com/article/1751413/figures/technique-de-correction-des-deformations-frontales-par-osteotomie-tibiale-proximale
- https://www.sciencedirect.com/science/article/pii/S187705172500156X
