Reconstruction of the extensor mechanism with fresh-frozen tendon allograft in total knee arthroplasty

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 s...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2014-11, Vol.22 (11), p.2771-2775
Main Authors: Llombart Blanco, Rafael, Valentí, Andrés, Díaz de Rada, Pablo, Mora, Gonzalo, Valentí, Juan R.
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee - adverse effects
Female
Humans
Joint replacement surgery
Knee
Knee Injuries - etiology
Knee Injuries - surgery
Male
Medicine
Medicine & Public Health
Middle Aged
Orthopedics
Patellar Ligament - injuries
Patients
Range of motion
Range of Motion, Articular
Reconstructive Surgical Procedures
Recovery of Function
Rupture
Surgeons
Tendon Injuries - etiology
Tendon Injuries - surgery
Tendons
Tendons - transplantation
Transplantation, Homologous
Trauma
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Summary: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. Level of evidence Case series, Level IV.
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-013-2688-4