Table 1.

Biomechanical testing results of an interlocking intramedullary nail and an inflatable nail

Biomechanical test	Interlocking nail (GK)	Expandable nail (FX)	Paired difference (GK − FX) (p value)	Median paired ratio (GK/FX)
Bending stiffness (N/mm)(n = 8)	222.7 (169.5–275.9)	280.8 (224.7–336.8)	−58.1 (−103.5–12.6) (p = 0.02)	1.2
Rotational rigidity (Nm/degree)(n = 6)	2.72 (0.07–5.37)	2.80 (1.62–3.97)	−0.08 (−3.22–3.07) (p = 0.95)	1.7
Play (degrees)(n = 6)	1.15 (−0.24–2.54)	0.38 (0.12–0.64)	0.77 (−0.77–2.32) (p = 0.26)	1.8
Maximum rotational strength (Nm)(n = 8)	26.1 (14.3–37.9)	12.6 (8.1–17.1)	13.49 (−0.08–27.05) (p = 0.05)	0.4

Values are expressed as means, with confidence intervals in parentheses.