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Study finds previous patellectomy does not affect outcomes in cruciate-retaining TKAs
Patients with previous patellectomies showed good results after undergoing total knee arthroplasty with a cruciate-retaining implant, according to this study.
Researchers assessed 33 patients undergoing total knee arthroplasty (TKA) with a cruciate-retaining implant (Nexgen CR; Zimmer, Warsaw, Indiana) with an average follow-up of 9.3 years. They evaluated patients in clinic, through radiographs and using the Hospital for Special Surgery Scoring System.
The patients increased their range of motion from 87° preoperatively to 118° postoperatively and their Hospital for Special Surgery Knee Scores increased from 52 preoperatively to 89 points postoperatively, according to the abstract. None of the patients displayed radiolucencies, loosening, osteolysis or fractures.
Ten patients experienced mild to moderate pain when climbing stairs, but not when walking on flat ground. When walking on flat ground, but not when climbing stairs, two patients had mild to moderate pain, according to the abstract. The remaining 21 patients had no pain when climbing stairs or walking on flat ground.