The Journal of Bone and Joint Surgery, Vol 77, Issue 11 1708-1712, Copyright © 1995 by Journal of Bone and Joint Surgery, Inc
Total knee arthroplasty after a previous patellectomy
GA Paletta and RS Laskin
Hospital for Special Surgery, New York, N.Y. 10021, USA.
We performed a retrospective, matched-control analysis of the results of
total knee arthroplasty with cement in twenty-two patients who had had a
previous patellectomy for either a fracture of the patella (sixteen
patients) or severe patellofemoral osteoarthrosis or chondromalacia
patellae (six patients). Nine of the patients were men and thirteen were
women. The average age at the time of the total knee arthroplasty was
sixty-nine years (range, fifty-nine to seventy-four years). The average
time from the patellectomy to the total knee arthroplasty was eight years
(range, two to fourteen years). The patients were divided into two groups
according to the type of implant that had been used. Group A (nine
patients) had had insertion of a posterior stabilized prosthesis (a
posterior cruciate-sacrificing implant) and Group B (thirteen patients) had
had insertion of a posterior cruciate-sparing implant. Two
computer-generated matched groups of patients who had had a total knee
arthroplasty with insertion of implants that were identical to those in the
study groups but who had not had a previous patellectomy served as
controls. Group C consisted of patients who had had insertion of the same
type of implant as that used in Group A, and Group D consisted of patients
who had had insertion of the same type of implant as that used in Group B.
All patients were evaluated before the arthroplasty and five years
postoperatively with use of the rating system of the Knee Society.(ABSTRACT
TRUNCATED AT 250 WORDS)
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