International Scholarly Research Notices

Research Article

Clinical and Radiographic Comparison of Oxidized Zirconium and Cobalt Chrome Femoral Components of a Single Design Primary Total Knee Arthroplasty: Is the Cost Difference Justified Based on Patient Outcomes?

Table 2

Clinical outcomes.
  Oxidized zirconium age all <65 ( )CoCrMo alloy all patients ( )CoCrMo alloy
age <65 ( )
Followup (years) (1.0–10.8) (1.0–11.1) (1.0–11.1)
Preoperative KSS (70–85) (70–87) (70–86)
Postoperative Last followup KSS (90–100) (90–100) (95–100)
Maximum flexion (°) (115–128) (60–126)* (60–126)
Knees experiencing pain at recent followup484
Patients with probable metal allergy100
Knees requiring manual manipulation022
Knees experiencing VTE000
Knees requiring revision000
Knees experiencing other complications02**1**
In a comparison of oxidized zirconium to CoCrMo alloy, a statistically significant difference was calculated for maximal flexion with (0.0436) but not felt to be clinically significant.
**These knees experienced dehiscence following surgery, were treated with secondary wound closure, and healed uneventfully.