Total Knee Arthroplasty Designed to Accommodate the Presence or Absence of the Posterior Cruciate Ligament

Table 2

Kinematics during the kneeling and lunge activities for the PCL-retained and PCL-resected groups (mean ± standard deviation, range).

	Nonweight bearing kneeling			Weight bearing lunge
	PCL-retained	PCL-resected		PCL-retained	PCL-resected
Patients	20	13		20	10
Skeletal knee flexion (°)	131 ± 13; (109 to 160)	124 ± 11; (105 to 141)	0.15	120 ± 11; (95 to 147)	123 ± 17; (87 to 145)	0.54
Implant valgus (°)	−1 ± 2; (−3 to 2)	1 ± 3; (−3 to 8)	0.02	−1 ± 1; (−2 to 1)	1 ± 2; (−5 to −1)	0.00
Tibial external rotation (°)	−10 ± 4; (−18 to −3)	−10 ± 6; (−19 to −1)	0.75	−11 ± 4; (−16 to −3)	−9 ± 4; (−18 to −4)	0.25
Medial condyle AP (mm)	−2 ± 4; (−10 to 9)	2 ± 4; (−3 to 9)	0.02	0 ± 4; (−6 to 8)	−2 ± 4; (−9 to 3)	0.22
Lateral Condyle AP (mm)	−10 ± 4; (−20 to −1)	−5 ± 4; (−9 to 1)	0.01	−8 ± 4; (−15 to −1)	−9 ± 3; (−15 to −5)	0.41

Significant differences between the PCL-retained and PCL-resected groups were assessed using a Student’s -test.