Reconstruction of the extensor mechanism with fresh-frozen tendon allograft in total knee arthroplasty
Materias Investigacion::Ciencias de la Salud::Ortopedia
Case series
Level IV
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Llombart-Blanco, R. (Rafael); Valenti, A. (Andrés); Diaz-de-Rada, P. (Pablo); et al. "Reconstruction of the extensor mechanism with fresh-frozen tendon allograft in total knee arthroplasty". Knee Surgery, Sports traumatology, Arthroscopy. 22 (11), 2014, 2771 - 2775
Purpose: Patellar tendon rupture after total knee replacement is a rare and highly limiting injury with multifactorial aetiology. Many reconstruction techniques have been described with not very predictable results. The use of allografts has been accepted as a suitable solution. Methods: A series of seven patients with patellar tendon rupture treated with fresh-frozen tendon allograft reconstruction after knee arthroplasty is presented. Results: Median follow-up is 25 months (20-31). Functional assessment improved, and the knee society score and knee functional score improved from 26 and 16 to 82 and 55, respectively. Median extension lag was 5° (0°-20°), with a median range of motion of 95° (70-100). Radiological study showed a rise of the patella of 22.26 mm. Conclusion: The use of fresh-frozen allografts as a solution to patellar tendon ruptures after knee arthroplasty seems to provide acceptable results. Increased patellar height does not seem to affect functionality.

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