Posterior stabilization in total knee arthroplasty with use of an ultracongruent polyethylene insert

Fifty-three primary and 47 revision posterior cruciate ligament (PCL)-substituting total knee arthroplasties (TKAs) using a highly conforming (ultracongruent) polyethylene insert were retrospectively reviewed over a 48- to 106-month (mean, 60 ± 11 months) follow-up period. These 100 knees were age a...

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Bibliographic Details
Published in:The Journal of arthroplasty 2000-08, Vol.15 (5), p.576-583
Main Authors: Hofmann, Aaron A., Tkach, Thomas K., Evanich, Christopher J., Camargo, Marcelo P.
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee - methods
Biomechanical Phenomena
Female
Follow-Up Studies
Humans
Knee Joint - diagnostic imaging
Knee Prosthesis
Male
Middle Aged
PCL resection
Polyethylene
Posterior Cruciate Ligament - surgery
posterior stabilized knee
primary knee arthroplasty
Prosthesis Design
Radiography
Reoperation
Retrospective Studies
revision knee arthroplasty
ultracongruent insert
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Summary:Fifty-three primary and 47 revision posterior cruciate ligament (PCL)-substituting total knee arthroplasties (TKAs) using a highly conforming (ultracongruent) polyethylene insert were retrospectively reviewed over a 48- to 106-month (mean, 60 ± 11 months) follow-up period. These 100 knees were age and sex matched with another 100 TKAs performed using a PCL-sparing design. The ultracongruent design has an anterior buildup of 12.5 mm and a more conforming articular surface to match better the radius of the femoral component. In primary and revision TKAs, the average Hospital for Special Surgery knee score (P =.3) and range of motion (P =.43) were similar between the PCL-sparing and ultracongruent groups. In primary and revision TKAs, there were no revisions resulting from instability for patients receiving an ultracongruent insert versus 5 knees in the PCL-sparing control group secondary to subsequent postoperative anteroposterior instability and PCL insufficiency.
ISSN:0883-5403
1532-8406
DOI:10.1054/arth.2000.6633