Abstract
Introduction
Stiffness after a total knee arthroplasty (TKA) is one of the most common post-operative complications. The purpose of this study is the evaluation of the effectiveness of TT proximalization osteotomy of improving a lack of flexion and secondary pain in patella baja (infera) post-TKA.
Materials and methods
Between April 2007 and July 2012, TT proximalization osteotomy was performed on 21 patients. The average preoperative flexion was 70° (in a range of 60–80). Clinical pre- and post-operative evaluations were performed with Knee Society Score, Western Ontario and McMaster Universities Arthritis Index scales and a satisfaction survey. Modified Blackburn-Peel index and Portner angle were used to evaluate patellar height.
Results
After an average follow-up of 35 months (range 18–48), an average flexion of 100° (range 90–100) and an overall satisfaction were obtained. Clinical scores improved significantly. The Blackburn-Peel index and Portner angle improved significantly from 0.3 (range 0.1–0.5) to 0.4 (0.3–0.5) and from 9 (3–15) to 12 (9–18), respectively. Three patients showed no signs of osteotomy consolidation. However, this was not linked to a lack of extension or an increase in local pain.
Conclusion
TT proximalization osteotomy provides satisfactory results in improving a lack of flexion and pain in patella baja post-TKR.
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Vives-Barquiel, M.A., Torrents, A., Lozano, L. et al. Proximalize osteotomy of tibial tuberosity (POTT) as a treatment for stiffness secondary to patella baja in total knee arthroplasty (TKA). Arch Orthop Trauma Surg 135, 1445–1451 (2015). https://doi.org/10.1007/s00402-015-2312-9
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DOI: https://doi.org/10.1007/s00402-015-2312-9