Symptomatic flexible flatfoot in adults: subtalar arthroereisis

Figures & data

Table 1 Patients’ demographic characteristics

Number of patients (feet)	16 (26)
Age, years, mean (range)	24.3±5.24 (18–35)
Sex, n (%)
Female	4 (25)
Male	12 (75)
Follow-up, months, mean (range)	15.1±4.7 (7–22)
Location, n (%)
Right	13 (50)
Left	13 (50)

Figure 1 Pre- and postoperative angles.

Notes: Preoperative and postoperative (A, B) calcaneal inclination angle (CDE), lateral talocalcaneal angle (BCD), Meary’s angle (ABC), (C, D) talonavicular angle (ACB), Kite’s angle (ADE) (change from baseline).
Abbreviation: R, right foot.

Figure 2 Preoperative and postoperative images of the patients in standing foot posture.

Notes: Change from baseline in (A, B) the foot arch in a patient, and (C, D) heel valgus in another patient.

Table 2 Comparison of preoperative and postoperative clinical and radiographic results

Variables	Preoperative (°)	Postoperative (°)	P-value
Calcaneal inclination
Mean ± SD	13.4±3.3	14.6±2.7	0.0377
Range	6–19	8–20
Meary’s
Mean ± SD	8±5.3	3.3±3	0.0001
Range	1–17	0–11
LTC
Mean ± SD	35.7±6.9	33.2±5.3	0.0957
Range	20–46	24–41
APTN
Mean ± SD	5.6±3.5	2.6±1.5	0.0001
Range	1–17	0.3–6
Kite’s
Mean ± SD	23.7±6.1	17.7±5	0.0001
Range	8–38	10–31
AOFAS
Mean ± SD	53±6.6	75±11.2	0.0001
Range	42–66	58–95
VAS
Mean ± SD	6.9±0.6	4.1±1.4	0.0001
Range	6–9	2–6

Abbreviations: SD, standard deviation; LTC, lateral talocalcaneal angle; APTN, anteroposterior talonavicular coverage angle; AOFAS, American Orthopaedic Foot and Ankle Society; VAS, visual analog scale.

Figure 3 Anteroposterior X-ray showing fixation failure of the subtalar implant at 7 months postoperatively.

Abbreviation: R, right foot.