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. 2023 Nov 9;48(4):1023–1030. doi: 10.1007/s00264-023-06031-1

Table 4.

Comparison of joint line change based on polyethylene style

CPS (N = 84; 58 RA-TKA, 26 C-TKA) MC (N = 240; 169 RA-TKA, 71 C-TKA) CR (N = 102; 61 RA-TKA, 41 C-TKA) PS (N = 377; 222 RA-TKA, 155 C-TKA) UC (N = 197; 90 RA-TKA, 107 C-TKA) p value
JL change  − 0.35 (3.5)  − 0.40 (3.3) 0.23 (3.5)  − 0.73 (3.0) 0.76 (3.1)  < 0.001
RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA
 − 0.27 (3.6)  − 0.55 (3.4)  − 0.05 (3.3)  − 1.3 (3.3) 0.31 (3.4) 0.11 (3.8)  − 0.48 (3.0)  − 1.1 (2.9) 0.94 (3.2) 0.61 (3.0)
JL change directionality:  < 0.001
   Elevation 51 (60.7%) 145 (60.4%) 49 (48.0%) 225 (59.7%) 93 (47.0%)
RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA
34 (58.6%) 17 (65.4%) 100 (59.2%) 45 (63.4%) 31 (50.8%) 18 (43.9%) 123 (55.4%) 100 (65.4%) 44 (48.9%) 48 (44.4%)
   No change 5 (5.95%) 17 (7.08%) 5 (4.9%) 36 (9.5%) 9 (4.55%)
RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA
3 (5.2%) 2 (7.7%) 11 (6.5%) 6 (8.5%) 2 (3.3%) 3 (7.3%) 29 (13.1%) 7 (4.6%) 2 (2.2%) 7 (6.5%)
   Distalization 28 (33.3%) 78 (32.5%) 48 (47.1%) 116 (30.8%) 96 (48.5%)
RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA RA-TKA C-TKA
21 (36.2%) 7 (26.9%) 58 (34.3%) 20 (28.2%) 28 (45.9%) 20 (48.8%) 70 (31.5%) 46 (30.1%) 44 (48.9%) 52 (48.1%)

Values given as mean (standard deviation) or number (%). Bold values indicate statistical significance

CPS constrained posterior-stabilized, MC medial-congruent, CR posterior cruciate retaining, PS posterior stabilized, UC ultra-congruent