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Should the position of the patellar component replicate the vertical median ridge of the native patella?
- Source :
- The Knee. 24(1)
- Publication Year :
- 2016
-
Abstract
- In total knee arthroplasty (TKA), the position of the patellar component can affect patellar tracking. However, the patellar component cannot always replicate the original high point of the patella because of anatomical variance. This study investigated whether altering the highest point of the patella can affect outcomes of primary TKA, especially in patients having a patella with a far-medialized median ridge.A retrospective review was performed for 177 knees (143 patients) treated with primary TKA between July 2011 and March 2014. Group 1 (34 knees) had the patellar component displaced over three millimeters from the median ridge, while Group 2 (143 knees) had the patellar component placed on the original median ridge position. The one-year follow-up outcomes were reviewed, including: patellar tilt angle, Knee Society Score, Feller Patellar Score, and modified Kujala Anterior Knee Pain Score.Mean (±standard deviation) displacement of the patellar component in Group 1 was 3.97±0.97mm lateral to the original position of the median ridge, with a significant decrease in lateral patellar tilt angle (P0.001). Lateral patellar tilt showed a positive correlation with the medialization of the patellar component (P0.001, r=0.401). Ability to rise from a chair was better in Group 1 (P=0.025). There were no other between-group differences in other clinical outcomes.There should be no need for the patellar component to replicate the original highest point of the native patella in primary TKA.
- Subjects :
- musculoskeletal diseases
Male
medicine.medical_specialty
Total knee arthroplasty
03 medical and health sciences
0302 clinical medicine
medicine
Humans
Orthopedics and Sports Medicine
Displacement (orthopedic surgery)
In patient
Range of Motion, Articular
Arthroplasty, Replacement, Knee
Aged
Retrospective Studies
Orthodontics
Aged, 80 and over
030222 orthopedics
business.industry
Anterior knee pain
Patellar tilt
030229 sport sciences
Patella
Recovery of Function
Middle Aged
Osteoarthritis, Knee
musculoskeletal system
Ridge (differential geometry)
Surgery
Radiography
Treatment Outcome
Component (group theory)
Female
business
Knee Prosthesis
human activities
Subjects
Details
- ISSN :
- 18735800
- Volume :
- 24
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- The Knee
- Accession number :
- edsair.doi.dedup.....695df917519eeee6f410b7ec2aad6ee4