{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T22:42:11Z","timestamp":1761864131173,"version":"3.37.3"},"reference-count":46,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2020,6,24]],"date-time":"2020-06-24T00:00:00Z","timestamp":1592956800000},"content-version":"vor","delay-in-days":175,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SICOT-J"],"accepted":{"date-parts":[[2020,6,2]]},"published-print":{"date-parts":[[2020]]},"abstract":"<jats:p><jats:italic>Introduction<\/jats:italic>: Post-operative misalignment of the lower limb mechanical axis following total knee arthroplasty (TKA) is thought to be associated with clinical failure. In a balanced knee, a neutral global mechanical axis following the use of intra-medullary (IM) guidance does not necessarily imply a horizontal TKA joint line. Using femoral and tibial axes separately would be more accurate in evaluating TKA alignment. Thus, the aim of the study is to define a pre-operative mechanical tibial and\/or femoral angle threshold value for post-operative optimal alignment correction using IM guides.<jats:italic>Methods<\/jats:italic>: This single-center prospective continuous pilot study included 50 patients treated with a TKA for primitive osteoarthritis. Femoral and tibial cuts were performed using intramedullary (IM) guide. Three angles were calculated and analyzed pre and post-operatively on standing antero-posterior views using long-leg radiographs: femorotibial angle (FTA), mechanical femoral angle (MFA), and mechanical tibial angle (MTA). Statistical analysis was performed for the whole sample and for the three following FTA subgroups; normo-axial, varus and valgus.<jats:italic>Results<\/jats:italic>: The pre-operative MTA is the only parameter for which a threshold value was observed; when pre-operative MTA exceeded the value of 94\u00b0, an optimal correction might not be obtained post-operatively.<jats:italic>Discussion<\/jats:italic>: Our results suggest that the bony correction obtained via IM guiding depends exclusively on the primary deformation of the tibia. In cases of a varus of more than 94\u00b0, the IM guide was found to yield sub-optimal corrections. Thus, other solutions need to be investigated.<\/jats:p>","DOI":"10.1051\/sicotj\/2020019","type":"journal-article","created":{"date-parts":[[2020,6,24]],"date-time":"2020-06-24T08:53:22Z","timestamp":1592988802000},"page":"22","source":"Crossref","is-referenced-by-count":3,"title":["Angular limit for coronal joint deformity correction using intramedullary guidance in total knee arthroplasty. 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