Alterations of kinematics in knees after single versus multiple radius femoral prostheses total knee arthroplasty: a retrospective study

Table 3 ROM (mean ± SD) among MR TKA, SR TKA and healthy knees groups

Parameters	MR	SR	Healthy	P
Parameters	MR	SR	Healthy	MR vs SR	MR vs healthy	SR vs healthy
Extension/Flexion ROM (°)	48.10 ± 9.03	44.23 ± 10.54	47.32 ± 7.60	0.489	0.154	0.612
Internal/External rotation ROM (°)	3.86 ± 2.33	3.41 ± 2.40	5.37 ± 4.35	0.707	0.247	0.228
Adduction/Abduction ROM (°)	1.82 ± 3.11	4.93 ± 3.58	3.62 ± 3.52	0.009	0.032	0.781
Anterior-posterior translation (cm)	0.51 ± 0.43	0.36 ± 0.54	0.54 ± 0.60	0.189	0.854	0.312
Proximal-distal translation (cm)	0.58 ± 0.54	1.03 ± 0.53	0.84 ± 0.45	0.003	0.039	0.525
Medial-lateral translation (cm)	0.54 ± 0.33	0.24 ± 0.40	0.67 ± 0.36	0.017	0.547	0.028

SD Standard deviation, TKA Total knee arthroplasty, SR Single radius, MR Multiple radius, ROM Range of motion

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