Supramalleolar osteotomy with medial distraction arthroplasty for ankle osteoarthritis with talar tilt

Table 2 Comparison of the preoperative and last follow-up time functional outcomes and radiological parameters

	SMOT (n = 16)		P value	SMOT with MDA (n = 18)		P value
	Preoperation	Last follow-up	P value	Preoperation	Last follow-up	P value
Functional outcomes
AOFAS, point	47.3 ± 14.9	77.4 ± 19.9	< 0.001	49.2 ± 12.0	84.5 ± 6.7	< 0.001
AOS pain, point	5.6 ± 0.9	3.5 ± 2.3	0.002	5.9 ± 0.8	2.4 ± 0.6	< 0.001
AOS function, point	5.9 ± 1.1	3.6 ± 2.0	< 0.001	6.2 ± 0.9	2.9 ± 0.9	< 0.001
ROM of ankle, degree	34.7 ± 7.8	36.4 ± 7.6	0.537	35.7 ± 7.2	37.8 ± 6.3	0.358
Takakura stage	3.6 ± 0.6	1.9 ± 1.0	< 0.001	3.8 ± 0.6	1.4 ± 0.6	< 0.001
Radiological parameters
TAS	80.8 ± 3.0	89.1 ± 2.0	< 0.001	81.6 ± 2.2	89.8 ± 1.6	< 0.001
TT	11.2 ± 3.4	2.9 ± 1.7	< 0.001	12.3 ± 4.0	1.8 ± 0.9	< 0.001
TMM	32.6 ± 7.3	27.7 ± 4.6	0.031	34.9 ± 8.6	28.5 ± 6.2	0.015
TC	71.2 ± 2.9	77.9 ± 2.8	< 0.001	69.5 ± 4.1	76.9 ± 3.7	< 0.001
TLS	76.8 ± 3.6	80.5 ± 2.3	0.002	75.4 ± 3.4	79.5 ± 3.0	0.001
HFA*	16.7 ± 4.4	4.2 ± 2.6	< 0.001	17.4 ± 5.3	3.1 ± 1.8	< 0.001

SMOT supramalleolar osteotomy, MDA medial distraction arthroplasty, AOFAS American Orthopaedic Foot and Ankle Society ankle-hindfoot score, AOS the Ankle Osteoarthritis Scale, ROM range of motion, TAS tibial articular surface angle, TT talar tilt angle, TMM tibial medial malleolar angle, TC tibiocrural angle, TLS tibial lateral surface angle, HFA hindfoot alignment angle
*The case number in SMOT group was 8, and in SMOT with MDA group was 14

ISSN: 1749-799X