Limb Lengthening after Primary Total Knee Arthroplasty: Customized Patient-Specific Instrumentation Does Not Affect Expected Limb Lengthening

Table 3

Measurement results stratified by degree of deformity.

Parameter	Moderate malalignment (n = 76)	Severe valgus (n = 7)	Severe varus (n = 38)
Preop alignment	4.0 (5.1)	16.28 (1.71)	15.34 (0.7)
Postop alignment	1.7 (3.1)	0.14 (1.22)	4.68 (0.57)
Change in alignment	2.3 (5.3)	16.43 (1.63)	10.66 (0.78)
Lengthening	1.2 (43.5)	29 (44.4)	13.9 (56.2)
	0.80	0.13	0.14
Percentage lengthened	56.6%	71.4%	71.1%

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.