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Knee Surgery, Sports Traumatology, Arthroscopy

Published in:

01-06-2012 | Knee

The influence of patellar position on soft tissue balance in minimal incision total knee arthroplasty

Authors: Shinya Oka, Hirotsugu Muratsu, Tomoyuki Matsumoto, Seiji Kubo, Akihiro Maruo, Hidetoshi Miya, Ryosuke Kuroda, Masahiro Kurosaka

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 6/2012

Abstract

Purpose

This study aims to clarify the influence of surgical exposure on intra-operative soft tissue balance measurements using a new tensor in minimal incision total knee arthroplasty (TKA).

Methods

Sixty patients with osteoarthritis of the knee received minimal incision TKAs. Twenty patients received a posterior-stabilized TKA using a quadriceps sparing approach, and the other forty patients, using a limited medial parapatellar (mini) approach. After femoral trial placement, soft tissue balance was measured using an offset type tensor at full extension and 90° of knee flexion, with the patella both laterally retracted and reduced. The joint component gap and varus imbalance were used to assess the difference in patellar position and surgical exposure.

Results

At extension, the joint component gap and varus imbalance showed no statistical difference regardless of patellar position in either TKA. However, the joint component gaps decreased at 90° of flexion when the patella was laterally retracted in both TKAs. Additionally, a significantly smaller joint gap was observed in the quadriceps sparing TKA than the mini-TKA with a retracted patella at 90° of flexion. Varus ligament imbalances decreased with the patella laterally retracted at 90° of flexion in the quadriceps sparing TKA, not in the mini-TKA.

Conclusion

Surgeons should be aware of the influence in surgical exposure of the joint gap and ligament balance during patella shift in minimal incision TKA.

Level of evidence

III.

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Title: The influence of patellar position on soft tissue balance in minimal incision total knee arthroplasty
Authors: Shinya Oka
Hirotsugu Muratsu
Tomoyuki Matsumoto
Seiji Kubo
Akihiro Maruo
Hidetoshi Miya
Ryosuke Kuroda
Masahiro Kurosaka
Publication date: 01-06-2012
Publisher: Springer-Verlag
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 6/2012
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-011-1642-6

Keynote webinar | Spotlight on medication adherence

Springer Medicine

The influence of patellar position on soft tissue balance in minimal incision total knee arthroplasty

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

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