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

Table 1 Basic information and preoperative parameters of the two groups

	SMOT (n = 16)	SMOT with MDA (n = 18)	P value
Male/female	5/11	6/12	0.897
Age, year	53.4 ± 10.2	56.2 ± 11.9	0.470
Left/right	6/10	5/13	0.717
Fibular osteotomy	8	7	0.515
Brostrom procedure	3	5	0.693
Calcaneal osteotomy	1	2	0.998
Takakura stage 3a/3b/4	7/8/1	6/11/1	0.805
Auto-/allograft	11/5	4/14	0.014
Follow-up, month	61.4 ± 20.6	35.6 ± 15.3	< 0.001
Preoperative outcomes
AOFAS score, point	47.3 ± 14.9	49.2 ± 12.0	0.683
AOS pain, point	5.6 ± 0.9	5.9 ± 0.8	0.311
AOS function, point	5.9 ± 1.1	6.2 ± 0.9	0.389
ROM of ankle, degree	34.7 ± 7.8	35.7 ± 7.2	0.700
Preoperative radiological parameters (degree)
TAS	80.8 ± 3.0	81.6 ± 2.2	0.378
TT	11.2 ± 3.4	12.3 ± 4.0	0.397
TMM	32.6 ± 7.3	34.9 ± 8.6	0.410
TC	71.2 ± 2.9	69.5 ± 4.1	0.177
TLS	76.8 ± 3.6	75.4 ± 3.4	0.252
HFA*	16.7 ± 4.4	17.4 ± 5.3	0.755

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