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Knee Surgery, Sports Traumatology, Arthroscopy

Published in:

01-10-2012 | Knee

The effect of tibial tuberosity realignment procedures on the patellofemoral pressure distribution

Authors: Archana Saranathan, Marcus S. Kirkpatrick, Saandeep Mani, Laura G. Smith, Andrew J. Cosgarea, Juay Seng Tan, John J. Elias

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 10/2012

Abstract

Purpose

The study was performed to characterize the influence of tibial tuberosity realignment on the pressure applied to cartilage on the patella in the intact condition and with lesions on the lateral and medial facets.

Methods

Ten knees were loaded in vitro through the quadriceps (586 N) and hamstrings (200 N) at 40°, 60°, and 80° of flexion while measuring patellofemoral contact pressures with a pressure sensor. The tibial tuberosity was positioned 5 mm lateral of the normal position to represent lateral malalignment, 5 mm medial of the normal position to represent tuberosity medialization, and 10 mm anterior of the medial position to represent tuberosity anteromedialization. The knees were tested with intact cartilage, with a 12-mm-diameter lesion created within the lateral patellar cartilage, and with the lateral lesion repaired with silicone combined with a medial lesion. A repeated measures ANOVA and post hoc tests were used to identify significant (P < 0.05) differences in the maximum lateral and medial pressure between the tuberosity positions.

Results

Tuberosity medialization and anteromedialization significantly decreased the maximum lateral pressure by approximately 15% at 60° and 80° for intact cartilage and cartilage with a lateral lesion. Tuberosity medialization significantly increased the maximum medial pressure for intact cartilage at 80°, but the maximum medial pressure did not exceed the maximum lateral pressure for any testing condition.

Conclusions

The results indicate that medializing the tibial tuberosity by 10 mm reduces the pressure applied to lateral patellar cartilage for intact cartilage and cartilage with lateral lesions, but does not overload medial cartilage.

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Title: The effect of tibial tuberosity realignment procedures on the patellofemoral pressure distribution
Authors: Archana Saranathan
Marcus S. Kirkpatrick
Saandeep Mani
Laura G. Smith
Andrew J. Cosgarea
Juay Seng Tan
John J. Elias
Publication date: 01-10-2012
Publisher: Springer-Verlag
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 10/2012
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-011-1802-8

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

The effect of tibial tuberosity realignment procedures on the patellofemoral pressure distribution

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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