Journal List > J Korean Foot Ankle Soc > v.18(3) > 1043300

Park, Park, Cho, and Im: Functional Evaluation after Modified Brostrom Procedure with Suture Bridge Technique for Chronic Ankle Instability in Athletes

Abstract

Purpose:

Ligament reattachment technique using a suture anchor appears to show satisfactory functional outcomes and mechanical stability compared with conventional bone tunnel technique. This study was prospectively conducted in order to evaluate functional outcomes of modified Brostrom procedures using the suture bridge technique for chronic ankle instability in athletes.

Materials and Methods:

Twenty eight athletes under 30 years of age were followed for more than two years after undergoing the modified Brostrom procedure using the suture bridge technique. Functional evaluation consisted of the foot and ankle outcome score (FAOS), foot and ankle ability measure (FAAM) score. Range of motion and time to return to exercise were evaluated using a periodic questionnaire. Talar tilt angle and anterior talar translation were measured through stress radiographs for evaluation of mechanical stability.

Results:

FAOS improved significantly from preoperative mean 59.4 points to 91.4 points (p<0.001). Daily living and sport activity scores of FAAM improved significantly from preoperative mean 50.5, 32.5 points to 94.8, 87.3 points, respectively (p<0.001). Talar tilt angle and anterior talar translation improved significantly from preoperative mean 16.8°, 13.5 mm to 4.2°, 4.1 mm at final follow-up (p<0.001). Times to return to exercise were as follows: mean 10.2 weeks in jogging, 15.4 weeks in spurt running, 13.1 weeks in jumping, 11.5 weeks in walking on uneven ground, 9.1 weeks in standing on one leg, 7.2 weeks in tip-toeing gait, 8.4 weeks in squatting, and 10.6 weeks in descending stairs.

Conclusion:

Modified Brostrom procedure using the suture bridge technique showed satisfactory functional outcomes for chronic ankle instability in athletes. Optimal indication and cost-effectiveness of the suture bridge technique will be studied in the future.

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Figure 1.
(A) Schematic drawing of the suture bridge technique describes the attachment of lateral ankle ligaments with two suture anchors. (B) Schematic drawing of the suture bridge technique describes the reinforcement using two knotless anchors.
jkfas-18-108f1.tif
Figure 2.
(A) Intraoperative photograph shows additional compression at ligament reattachment site with knotless anchors. (B) Intraoperative photograph shows the repair configuration after modified Brostrom procedure using the suture bridge technique.
jkfas-18-108f2.tif
Figure 3.
(A) Postoperative stress radiograph shows the varus stability of ankle and the placement of suture anchors in fibula (white arrows: position of two knotless anchors). (B) Postoperative stress radiograph shows a stable anterior talar translation and the placement of suture anchors in fibula (black dots: position of two knotless anchors). AP: anteroposterior, LAT: lateral.
jkfas-18-108f3.tif
Table 1.
Functional Evaluation with Foot and Ankle Outcome Score
FAOS subscale Preoperative Postoperative 6 mo Final follow-up
Pain 64.1±14.7 84.5±9.5 89.2±8.6
Symptom 58.5±12.2 85.2±8.8 92.4±8.8
ADL 71.5±10.3 87.3±6.7 94.5±5.2
Sport 38.6±14.6 82.5±10.2 88.4±10.5
QOL 64.2±12.5 88.2±10.4 92.4±7.5
Total 59.4±12.8 85.5±9.8 91.4±8.6

Values are presented as mean±standard deviation. FAOS: foot and ankle outcome score, ADL: activities of daily living QOL: quality of life.

Table 2.
Times to Return to Exercise after Modified Brostrom Procedures Using the Suture Bridge Technique
Exercise Times to return (wk)
Jogging 10.2±3.5
Spurt running 15.4±4.8
Jumping 13.1±4.1
Walking on uneven ground 11.5±3.6
Standing on one leg 9.1±3.2
Tip-toeing gait 7.2±2.5
Squatting 8.4±2.8
Descending stairs 10.6±4.2

Values are presented as mean±standard deviation.

Table 3.
Evaluation of Mechanical Stability with Ankle Stress Radiographs
Stress radiograph Preoperative Postoperative 3 mo Postoperative 6 mo Final follow-up
Talar tilt angle (o) 16.8±6.6 2.8±1.8 4.1±2.5 4.2±2.8
Anterior talar translation (mm) 13.5±4.8 3.6±2.5 4.3±2.4 4.1±2.2

Values are presented as mean±standard deviation.

Table 4.
Comparison between Injured and Uninjured Ankle with Stress Radiographs
Side Talar tilt angle (o) Anterior talar translation (mm)
Preoperative Final follow-up Preoperative Final follow-up
Injured side 16.8 4.2 13.5 4.1
Uninjured side 4.3 4.1 4.5 4.7
p-value <0.001 0.988 <0.001 0.742

Values are presented as mean.

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