Medial Unicompartmental Knee Resurfacing Study
Updated 411/22/09
Medial unicompartmental knee resurfacing (Repicci), results for 588 implants
at 56.8 months average follow up.
Original Link
L Kohan, R Cordingley, D Kerr (Joint Orthopaedic
Centre)
Introduction:
This is a descriptive, prospective, longitudinal analysis of
functional outcomes and component survival in 588 medial
unicompartmental knee resurfacing procedures. A consecutive series
over 6.8 years with all implants the Biomet Repicci 11 (Biomet). An
overall 97.8% implant survival rate was achieved.
Method:
All surgical implantations were carried out by one surgeon using
a minimally invasive approach. All patients underwent an early
mobilisation rehabilitation programme. No patient was lost to
follow-up. The age range for the knee resurfacing components was
43-92 years, with 367 males and 219 females. The average age was 68
years. SF-36 and Womac Health Questionnaires were completed. The
patient inclusion criteria for this cohort included articular
cartilage changes no greater than grade 2 (outerbridge) in lateral
compartment and more than half of the ACL intact.
Results:
Total survival was 97.8%. 588 knees were resurfaced with a mean
elapsed time since re-surfacing of 56.8 months (Median 64 months,
maximum 82.6 months).There were 13 failures that required revision.
2 from deep infection, 1 loose femoral component, 1 ACL failure and
instability and 9 progression of arthritis. There was one DVT in a
patient that remained in hospital for 5 days. 87% of patients were
discharged from hospital 23 hours after surgery. SF-36 and WOMAC
scores were assessed preoperatively, 6, 12 months and annually post
operatively. Function, pain, stiffness, social functioning, physical
function and role physical all improved dramatically in the first
6months after surgery then remained static out to 6.8 years.
