Internal rotational patellar resection and patella alta induced patellar maltracking in total knee arthroplasty: intraoperative measurement of the patellofemoral pressure

Table 2 PFP of the RP phase and the RPK phase for the FT and IT groups

		Lateral PFP			Medial PFP
		FT group	IT group	p value	FT group	IT group	p value
PFP of the resurfaced patella phase
Knee flexion angle	0°	5.4 ± 4.4	4.2 ± 4.4	n.s.	3.4 ± 3.1	2.9 ± 3.3	n.s.
	90°	21.3 ± 18.1	38.8 ± 18.0	< 0.001	8.2 ± 9.0	5.1 ± 7.2	n.s.
	120°	24.8 ± 21.5	42.5 ± 20.6	0.002	10.8 ± 8.3	6.9 ± 9.0	n.s.
	135°	31.0 ± 24.3	49.7 ± 30.6	0.034	18.4 ± 12.3	9.8 ± 9.1	0.013
PFP of the resurfaced patella and knee phase
Knee flexion angle	0°	2.8 ± 1.8	2.5 ± 2.1	n.s.	3.5 ± 2.9	3.2 ± 4.0	n.s.
	90°	22.0 ± 11.5	48.6 ± 23.0	< 0.001	9.4 ± 8.1	5.3 ± 6.2	0.029
	120°	34.6 ± 21.5	66.2 ± 19.1	< 0.001	14.8 ± 12.8	7.6 ± 10.4	0.019
	135°	42.5 ± 27.1	76.3 ± 22.5	< 0.001	20.4 ± 16.1	10.2 ± 14.9	0.023

Data are presented as mean ± standard deviation
FT favorable patellar tracking, IT impaired patellar tracking, PFP patellofemoral pressure, RP resurfaced patella, RPK resurfaced patella and knee, n.s. not significant

ISSN: 2234-2451