Orthopedics - Eliza Russell

                                                Orthopedics - Eliza Russell           

             An exciting new study out of Balgrist University Hospital’s Department of Orthopedics in Zurich, Switzerland, has started looking at the association between increased tibial tubercle torsion and the risk of developing lateral patellofemoral osteoarthritis. 

Osteoarthritis (OA), a progressive degenerative disease, causes a progressive loss of articular cartilage. Knee OA, specifically, is a major cause of a lesser quality of life and creates an initial reliance on non-steroidal anti-inflammatory drugs (NSAIDs) and may eventually even require surgical intervention. Knee OA is an incredibly common condition, and in 2012, it was estimated that 15.1 million people in the U.S. suffered from it, while 8.6 million even had advanced symptomatic knee OA. 

Tibial tubercle torsion (TT torsion), sagittal tibial tuberosity–trochlear groove (sTT–TG) distance, tibial tuberosity rotational angle (TT–RA), tibiofemoral rotation, and tibial tuberosity lateralisation (TT lateralisation), however, are new and emerging anatomical parameters of the patellofemoral (PF) joint, fueled by new 3D imaging technology such as CT scans and MRIs. 


This new, experimental study, looks at the correlation between these new anatomical parameters and the risk of developing knee OA later in life. Results showed that TT torsional, specifically, is associated with advanced lateral PFOA. The study even reports that it may represent an additional risk factor (alongside age, joint stress, previous injuries, bone deformities, and even certain metabolic diseases), revealing that this new field of radiographic imaging could lead to an increase in pre-diagnoses of the condition. Overall, the findings underscore how substantial the role of rotational malalignments can be in identifying future cases of knee OA.


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