Table 2.

Image Evaluation of the Talar Dome in Accordance With Magerkurth et al³⁰ and van Bergen et al.⁵⁰

	Dorsiflexion	Neutral Position	Distraction
α-angle lateral (degrees)a	56.7±3.8 (37.3-93.8)	37.3±3.2 (8.3-72.5)	40.8±3.2 (20.2-68.2)
β-angle lateral (degrees)	133.5±3.5 (111.6-156.3)		132.6±3.2 (106.6-167.7)
Accessible area lateral (%)b	42.6±2.6 (24.9-64.7)	28.4±2.4 (6.6-51.6)	30.9±2.3 (14.4-48.2)
α-angle medial (degrees)c	53.3±3.4 (33.8-76.1)	39.6±3.0 (17.0-72.5)	45.5±3.7 (13.3-81.3)
β-angle medial (degrees)	129.0±3.2 (110.2-150.2)		132.8±3.1 (104.0-162.7)
Accessible area medial (%)d	41.2±2.1 (27.8-57.5)	30.4±2.3 (13.6-55.0)	34.9±3.1 (8.2-60.4)
Tibial coverage of the talus lateral (%)	85.3±3.6 (63.0-108.7)		88.5±3.4 (54.7-116.7)
Tibial coverage of the talus medial (%)	80.1±3.0 (53.6-102.1)		82.7±3.4 (51.2-110.0)

^aSignificant difference between maximal dorsiflexion and neutral position (P = .001) as well as maximal dorsiflexion and noninvasive distraction (P = .007).

^bSignificant difference between maximal dorsiflexion and neutral position (P = .001) as well as maximal dorsiflexion and noninvasive distraction (P = .007).

^cSignificant difference between maximal dorsiflexion and noninvasive distraction compared to neutral position (P = .020).

^dSignificant difference between maximal dorsiflexion and noninvasive distraction compared to neutral position (P = .16).