Long-term Follow-up of Patellar Nonresurfacing in Total Knee Arthroplasty
Clinics in Orthopedic Surgery
;
: 49-54, 2020.
Article
in English
| WPRIM
| ID: wpr-811123
ABSTRACT
BACKGROUND:
We aimed to confirm the long-term effect of patellar nonresurfacing (patellar decompression) in preventing anterior knee pain after total knee arthroplasty (TKA) and to investigate the possible complications.METHODS:
Among patients who underwent primary TKA after being diagnosed as having advanced osteoarthritis (Kellgren-Lawrence grade 4) at our institution from January 2004 to December 2010, 121 patients who were followed up for more than 7 years were included in this study. Patients who underwent TKA with and without patellar decompression were classified as the study group and control group, respectively. A clinical knee rating score was used to compare the postoperative clinical outcomes between groups. To identify complications after patellar decompression, simple radiographs (weight-bearing anteroposterior and lateral views, patella in 30° and 45° axial views, and whole scanogram) were taken during follow-up.RESULTS:
There were no complications such as patellar fracture, osteonecrosis, and subluxation. At 2 years after surgery, the prevalence of anterior knee pain was 12.7% and 18.0% in the study group and control group, respectively (p = 0.42), and the number of patients with patellofemoral osteoarthritis grade II or over was lower in the study group (p = 0.03). At 7 years after surgery, the prevalence of anterior knee pain was 18.3% and 24.0% in the study group and control group, respectively (p = 0.45), and there was no statistically significant intergroup difference in the number of patients with patellofemoral osteoarthritis grade II or over (p = 0.11).CONCLUSIONS:
Patellar nonresurfacing TKA reduces anterior knee pain in the early postoperative period. The procedure can be considered a relatively safe option with fewer complications; however, its effectiveness appears to decrease over time.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Osteoarthritis
/
Osteonecrosis
/
Patella
/
Postoperative Period
/
Prevalence
/
Follow-Up Studies
/
Arthroplasty, Replacement, Knee
/
Decompression
/
Knee
Type of study:
Observational study
/
Prevalence study
/
Prognostic study
/
Risk factors
Limits:
Humans
Language:
English
Journal:
Clinics in Orthopedic Surgery
Year:
2020
Type:
Article
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