Hybrid Total Knee Arthroplasty Revisited: Midterm Followup of Hybrid versus Cemented Fixation in Total Knee Arthroplasty

Table 3

Femoral radiolucencies.

	Hybrid	Cemented	𝑃 value
No. of femoral radiolucencies	19 (9.8%)	14 (12.6%)	0.46
Mean radiolucency size (cm)	1.39	1.15	0.23
Femur Zone 1 lucency	12 (6.2%)	4 (3.60%)	0.33
Femur Zone 2 lucency	8 (4.2%)	1 (0.90%)	0.16
Femur Zone 3 lucency	1 (0.5%)	0	1
Femur Zone 4 lucency	3 (1.6%)	10 (9.01%)	𝟎.𝟎𝟎𝟓^∗
Femur Zone 5 lucency	0	0
Femur Zone 6 lucency	0	0
Femur Zone 7 lucency	0	0

Follow-up radiographs were evaluated for radiolucencies under the femoral component. Mean size (cm) as well as the location, based on the Knee Society total knee arthroplasty roentgenographic evaluation and scoring system [19], is shown. *Statistically significant difference (𝑃<0.05).