Patellar instability is a complication after total knee replacement and a clear causative factor for patients\u2019 dissatisfaction. With modern implants, the design of the components does not appear to be a causative factor, as it can often be due to technical surgical errors such as the mispositioning of the components (mostly in internal rotation). To treat patellar instability and restore the proper geometry and biomechanics of the replaced knee, we performed the proximal \u201ctube\u201d realignment of the patella, as described by Insall. Preoperatively, knees were studied for any malrotation with CT, according to Berger\u2019s protocol. Satisfactory clinical outcomes were recorded, with no recurrence at the last follow-up, with the technique described and the use of a dome-shaped patellar component that can be forgiving for stability despite its propensity for increased contact stress.<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false},"categories":[2766],"tags":[2876,2885,2884,2882,2886,2883,2887],"affiliation":[],"contributor":[2880,2878,2877,2879,2698,2881],"journalissue":[2874],"class_list":["post-21762","article","type-article","status-publish","hentry","category-jo-vol-16-n-3-sep-dec-2024","tag-arthroplasty","tag-insall","tag-knee-biomechanics","tag-patellofemoral-instability","tag-proximal-realignment","tag-tka","tag-tt-tg-angle","contributor-c-buono","contributor-f-d-cannito","contributor-g-de-giosa","contributor-g-giannini","contributor-g-solarino","contributor-s-urga","journalissue-jo-vol-16-n-3-sep-dec-2024"],"acf":[],"yoast_head":"\n