Fibular osteotomy is helpful for talar reduction in the treatment of varus ankle osteoarthritis with supramalleolar osteotomy

Table 1 Basic information and preoperative parameters of the two groups

	SMOT (n = 39)	SMOT with FO (n = 24)	P value
Male/female	13/26	6/18	0.484
Age, year	55.3 ± 9.8	56.4 ± 9.1	0.658
Left/right	15/24	10/14	0.801
Brostrom procedure	17	16	0.075
Calcaneal osteotomy	2	2	0.632
Takakura stage 2/3a/3b/4	7/16/15/1	2/9/12/1	0.662
Auto-/allograft	8/31	7/17	0.434
Follow-up, month	44.4 ± 20.5	49.2 ± 18.9	0.357
Preoperative outcomes
AOFAS score, point	50.5 ± 11.2	48.2 ± 14.4	0.481
AOS pain, point	5.7 ± 0.9	5.6 ± 1.0	0.683
AOS function, point	6.1 ± 0.9	5.7 ± 1.1	0.121
ROM of ankle, degree	40.1 ± 8.4	37.8 ± 9.2	0.313
Preoperative radiological parameters
TAS, degree	81.8 ± 4.1	80.1 ± 3.5	0.097
TT, degree	6.9 ± 4.7	7.1 ± 4.9	0.872
TMM, degree	34.4 ± 6.7	33.7 ± 5.7	0.672
TC, degree	70.2 ± 3.9	68.7 ± 4.3	0.159
TLS, degree	75.2 ± 3.2	74.3 ± 3.8	0.317
HFA^a, degree	14.8 ± 3.4	15.9 ± 5.1	0.308
TFCS, mm	2.9 ± 0.5	2.8 ± 0.6	0.478
MDT, mm	6.2 ± 2.0	7.2 ± 2.2	0.068

SMOT, Supramalleolar osteotomy; FO, fibular osteotomy; AOFAS, the American Orthopaedic Foot and Ankle Society ankle-hindfoot score; AOS, 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; TFCS, tibiofibular clear space; MDT, medial displacement of talus
^aThe case number in SMOT group was 21, and in SMOT with FO group was 17

ISSN: 1749-799X