Fractures in Oxford unicompartmental knee arthroplasty are associated with a decreased medial keel-cortex distance of the tibial implant

Table 3 Postoperative measurement of the tibial anatomy and the ICCa

	Non-fracture (n = 1834)	Fracture (n = 19)	p-Value	ICC (95%)
				Intrarater ICC	Interrater ICC
reKmmK [%]	27.1 (25.7–28.3)	23.3 (23.2–24.8)	< 0.001	0.96 (0.93–0.98)	0.90 (0.82–0.95)
remTmK [%]	49.2 (48.1–50.2)	48.8 (47.7–49.8)	0.400	0.95 (0.91–0.97)	0.65 (0.33–0.81)
remTKm [%]	22.1 (20.6–23.5)	24.5 (23.6–26.7)	< 0.001	0.91 (0.84–0.95)	0.84 (0.71–0.92)
HkpK [%]	10.0 (9.8–10.1)	8.4 (6.3–10.3)	0.004	0.98 (0.97–0.99)	0.98 (0.96–0.99)
TCAA [°]	88.5 (86.9–89.9)	89.0 (87.4–91.0)	0.193	0.93 (0.88–0.96)	0.93 (0.87–0.96)
TCPS [°]	7.5 (5.9–9.0)	9.0 (7.3–11.0)	0.030	0.94 (0.91–0.97)	0.92 (0.86–0.96)

Values are displayed as medians with interquartile ranges (Q1 25%–Q3 75%). The data were tested using the Mann–Whitney U test to compare differences between groups
reKmmK distance from the implant keel to the medial tibial cortex, remTmK distance from the mechanical tibial axis to the medial tibial cortex, remTKm distance from the mechanical tibial axis to the implant keel, HkpK distance from the posterior keel to the posterior cortex, TCAA tibial component alignment angle, TCPS tibial component posterior slope, CI confidence interval

ISSN: 2234-2451