Limb Lengthening after Primary Total Knee Arthroplasty: Customized Patient-Specific Instrumentation Does Not Affect Expected Limb Lengthening
Table 2
Measurement results.
Parameter
Varus (n = 101)
Valgus (n = 20)
Customized (n = 15)
Conventional (n = 106)
Overall (N = 121)
Preop alignment
9.36 (0.59)
8.75 (1.5)
6.2 (1.26)
6.39 (0.93)
6.36 (0.82)
Postop alignment
2.94 (0.34)
0.5 (0.79)
0.67 (0.69)
2.8 (0.35)
2.54 (0.33)
Change in alignment
6.42 (5.40)
9.25 (6.97)
5.53 (1.19)
3.58 (0.82)
3.83 (0.74)
Lengthening (mm)
3.14 (4.92)
16.2 (9.79)
10.73 (10.22)
7.61 (4.81)
5.32 (4.42)
0.52
0.11
0.31
0.12
0.23
Percentage lengthening
59.4%
75%
60%
62.3%
62.0%
Values are expressed as mean (SD). †Comparison of preoperative and postoperative limb length within each subgroup. Alignments are expressed in degrees. Lengthening is expressed in mm.
