Radiological and clinical outcome of lateral ankle instability with medial compartment osteoarthritis

Category: Ankle, Ankle Arthritis, osteoarthritis, ankle instability Introduction/Purpose: When lateral ankle instability (LAI) is not treated for long period, unbalanced loading on medial ankle may proceed to osteoarthritis (OA). Outcome studies about osteoarthritis with lateral ankle instability after stabilization, however, have rarely been reported. The authors have investigated the radiological and clinical outcome of ligament stabilization for LAI with medial compartment OA. Methods: The study is based on 25 ankles of LAI with medial compartment ankle OA that underwent lateral ankle ligament reconstruction from 2007 to 2014 with at least 1 year follow-up. The medial ankle OA was diagnosed with degenerative change of medial ankle on plain X-ray or MRI or arthroscopic findings. The OA was classified using Takakura stage, and arthroscopic degenerative change was classified by modified Outerbridge grading. Ligament stabilization surgery was done using either modified Broström procedure or lateral ligament reconstruction using semitendinosus tendon allograft. Arthroscopic synovectomy, debridement, and microfracture for osteochondral lesion were performed when needed. Clinical outcomes were evaluated using visual analogue scale (VAS) pain score, American Orthopedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, Karlsson- Peterson score, and subjective patient satisfaction. Statistical analysis were done using Wilcoxon signed rank test. Results: The average instability duration was 98 (range, 12-480) months and the average follow up period was 46 (range, 13-108) months. Preoperative Takakura stage was mostly I (n=19, 76%) and II (n=4, 17%), and was same postoperatively. MRI OA findings of 18 ankles were medial cartilage denudation (17%), cartilage thinning/erosion (44%), medial osteophyte (50%), and loose bodies (30%). Modified Outerbridge grade 2 and 4 were most common (both 41%). The VAS pain score decreased from 6.1 ± 1.6 preoperatively to 1.8 ± 1.6 postoperatively (P<0.05). The AOFAS score improved from 61.8 ± 14.7 preoperatively to 90.0 ± 6.3 postoperatively, and the Karlsson-Peterson score improved from 54.5 ±14.4 to 89.4 ± 8.4 (P<0.05). There were no significant complications. All patients were satisfied. Conclusion: Ligament stabilization accompanied with arthroscopic procedure could draw good outcome, even without structural bony deformity correction. Even with no improvement in plain radiograph, functional score could be improved.

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Comparison of Clinical Outcomes in Patients with Generalized Ligamentous Laxity and without Generalized Laxity in the Arthroscopic Modified Broström Operation for Chronic Lateral Ankle Instability

Foot & Ankle Orthopaedics ◽

10.1177/2473011417s000261 ◽

2017 ◽

Vol 2 (3) ◽

pp. 2473011417S0002

Author(s):

YoungKoo Lee ◽

Jungwoo Yoo ◽

Keon Hee Yun ◽

Ji Yong Park

Keyword(s):

Clinical Outcome ◽

Clinical Outcomes ◽

Tilt Angle ◽

Ankle Instability ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Ligamentous Laxity ◽

Lateral Ankle Instability ◽

Talar Tilt

Category: Sports Introduction/Purpose: The arthroscopic modified Broström operation (MBO) has been developed and frequently used to treat chronic lateral ankle instability (CLAI). Clinical outcome of arthroscopic MBO was reported as good or excellent. But there were no report about comparison of clinical outcomes between patients with generalized ligamentous laxity (laxity) and without generalized ligamentous laxity (no laxity). The purpose of this study is to compare the clinical outcomes of the group with generalized ligamentous laxity and without generalized ligamentous laxity in chronic lateral ankle instability. Methods: From January 2013 to November 2015, Arthroscopic MBO was performed in 99 patients for CLAI. We retrospectively analyzed 99 consecutive patients were included in terms of inclusion criteria. All patients had giving way, persistent pain and an inability to resume one’s preinjury activity level for more than 6 months. Patients were divided into 2 groups: laxity group (24 ankles) and no laxity group (75 ankles). Evaluation was performed preoperatively and at a final follow-up a minimum of 12 months postoperatively using the American Orthopedic Foot and Ankle Society (AOFAS) hindfoot ankle score, pain Visual Analogue Scale (VAS)(0~100), and talar tilt angle. Results: In terms of radiological outcomes, the preoperatively talar tilt angle was greater in patients in laxity group than in no laxity group (p < .001). The last follow-up talar tilt angle was the same between in patients in laxity group and in no laxity group (p=0.413). But preoperative-last follow up difference was found between two groups (p=0.03). The variation from preoperative to last follow up talar tilt angle showed significant greater value in laxity group (-6.9 ± 5.2) than in no laxity group (-4.2 ± 4.2)(p=0.03). In terms of clinical outcome, last follow up AOFAS and VAS in all groups were improved than preoperative scores (27.5 ± 23.7, 24.1 ± 18.4, respectively). But preoperative-last follow up differences were not found between two groups (P=0.52). Conclusion: In terms of radiologic outcomes, there was difference outcome variation between two groups, in terms of clinical outcomes, there were no difference outcome variations between two groups. All groups achieved successful clinical and radiological last follow up outcomes even though there was difference outcome variation in talar tilt. Arthroscopic MBO should be considered as a reasonable method in patients who have chronic lateral ankle instability regardless of generalized ligamentous laxity.

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Radiological and clinical outcome of lateral ankle instability with medial compartment osteoarthritis

Foot and Ankle Surgery ◽

10.1016/j.fas.2017.07.488 ◽

2017 ◽

Vol 23 ◽

pp. 131

Author(s):

H.G. Jung ◽

S.W. Kim ◽

M.Y. Sun ◽

H.J. Kang

Keyword(s):

Clinical Outcome ◽

Ankle Instability ◽

Medial Compartment ◽

Lateral Ankle ◽

Medial Compartment Osteoarthritis ◽

Lateral Ankle Instability

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A comparison between arthroscopic and open surgery for treatment outcomes of chronic lateral ankle instability accompanied by osteochondral lesions of the talus

10.21203/rs.2.17080/v1 ◽

2019 ◽

Author(s):

Can Xu ◽

Mingqing Li ◽

Chenggong Wang ◽

Hua Liu

Keyword(s):

Complication Rate ◽

Ankle Instability ◽

Arthroscopic Surgery ◽

Arthroscopic Treatment ◽

Functional Score ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Arthroscopic Procedure ◽

Lateral Ankle Instability

Abstract Background : The present study aimed to examine the efficacy and safety of concurrent arthroscopic treatment of osteochondral lesion of talus (OLT) and lateral ankle instability. It was hypothesized that the outcome of all arthroscopic surgery was no worse than that of the combined open and arthroscopic surgery for treating chronic lateral ankle instability accompanied by OLT. Methods : All the patients diagnosed of chronic lateral ankle instability accompanied by OLT who were surgically treated between May 2015 and May2017 were targeted for inclusion. A total of 32 patients received concurrent arthroscopic treatment of OLT and lateral ankle instability, and 35 patients received arthroscopic treatment of OLT and open lateral ankle stabilization. All these patients were followed up using Karlsson Ankle Functional Score, visual analog scale (VAS) scores, Tegner activity score, and American Orthopaedic Foot and Ankle Society Score (AOFAS). The satisfaction and complication rate was evaluated and compared. Results : At 24-month follow-up, the Karlsson score, VAS score, Tegner score and AOFAS score were significantly improved in both groups in relation to the pre-operative condition. The two groups did not differ significantly from each other in terms of functional outcomes, satisfaction and complication rate. Conclusion : In comparison with the open lateral ankle stabilization and arthroscopic treatment of OLT, the all arthroscopic procedure showed no difference in clinical outcome at 24-month follow-up for treating chronic lateral ankle instability accompanied by OLT. With the benefits of minimal invasive arthroscopic procedure and an aggressive rehabilitation protocol, the treatment efficacy for the patients with chronic lateral ankle instability accompanied by OLT was still inferior to that for the patients with chronic ankle instability. Trial registration : The present study was carried out with the retrospectively registered data starting from May 28, 2015

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Chronic Lateral Ankle Instability

The American Journal of Sports Medicine ◽

10.1177/0363546508319050 ◽

2008 ◽

Vol 36 (11) ◽

pp. 2167-2172 ◽

Cited By ~ 121

Author(s):

Woo Jin Choi ◽

Jin Woo Lee ◽

Seung Hwan Han ◽

Bom Soo Kim ◽

Su Keon Lee

Keyword(s):

Logistic Regression ◽

Confidence Interval ◽

Odds Ratio ◽

Ligament Reconstruction ◽

Ankle Instability ◽

Multivariate Logistic Regression ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Lateral Ankle Instability

Background There has been no attempt to correlate the type and number of intra-articular lesions with the results of ligament reconstruction for chronic lateral ankle instability. Hypothesis Certain intra-articular lesions affect the clinical outcome of ligament reconstruction. Study Design Case series; Level of evidence, 4. Methods Sixty-five ankles from 64 patients underwent a modified Broström operation for chronic lateral ankle instability with a mean follow-up of 28.7 months (range, 12–67). The results were assessed according to the Karlsson-Peterson Ankle Score. The type of intra-articular lesions and the association of clinical outcome were investigated using Pearson's correlation coefficient and multivariate logistic regression analysis. Results The average Karlsson-Peterson Ankle Score was improved from 53 ± 14.63 preoperatively to 85.21 ±11.97 at final follow-up ( P < .001). Five different intra-articular lesions were described in 63 ankles (96.9%), and the ankle score negatively correlated with the number of lesions ( r = −.604; P < .001). Multivariate logistic regression showed that syndesmosis widening (odds ratio, 11.1; 95% confidence interval: 2.2–55.4; P = .003), osteochondral lesions of the talus (odds ratio, 8.5; 95% confidence interval: 1.7–42.3; P = .008), and ossicles (odds ratio, 4.5; 95% confidence interval: 1.0–20.2; P = .046) are significant predictors of unsatisfactory results after ligament reconstruction. Conclusion Arthroscopic diagnosis and treatment of intra-articular lesions associated with chronic lateral ankle instability is a safe and effective method. The presence of any combination of associated intra-articular lesions can result in a poor outcome.

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Chronic Lateral Ankle Instability with Subtalar Instability: Does Lateral Ligaments Reconstruction Reliable?

Foot & Ankle Orthopaedics ◽

10.1177/2473011420s00205 ◽

2020 ◽

Vol 5 (4) ◽

pp. 2473011420S0020

Author(s):

Shi-Ming Feng

Keyword(s):

Ankle Instability ◽

Anatomical Reconstruction ◽

Functional Score ◽

Anterior Talofibular Ligament ◽

Short Term ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Lateral Ankle Instability ◽

Subtalar Instability

Category: Ankle; Arthroscopy; Sports Introduction/Purpose: To evaluate the functional outcomes of arthroscopic anatomical reconstruction of anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) in the treatment of chronic lateral ankle instability with subtalar instability during short term follow-up Methods: We retrospectively analyzed data in 8 patients (5 males, 3 females; 2 left ankles, 6 right ankles) aged between 21 and 49 years, with an average age of 31.74 +- 8.48 years presenting with CLAI with subtalar instability from Auguse 2015 to October 2018. The duration of the symptoms lasted for 12 to 43 months, with an average of 24.26 +- 10.17 months. All patients underwent arthroscopic anatomical reconstruction of ATFL and CFL. Pre- and postoperative visual analogue scales (VAS), the American Orthopaedic Foot & Ankle Society Ankle-Hindfoot Score (AOFAS) and the Karlsson Ankle Functional Score (KAFS) were compared to evaluate the curative effect of the operation Results: After surgery, all incisions healed in stage I and there were no complications. All patients were followed for 12 to 36 months, averaging 26.15 +- 9.34 months. At the final follow-up, the ankle varus stress test and ankle anterior drawer test were both negative. Range of joint motion was good. There was no lateral instability of the ankle and subtalar, and all patients returned to normal gait. The mean VAS score decreased to 1.06 +- 0.27, the AOFAS score increased to 93.16 +- 5.26 and the KAFS score increased to 92.01 +- 6.73. All the follow-up indexes were significantly different from those before surgery Conclusion: Arthroscopic anatomical reconstruction of ATFL and CFL in the treatment of chronic lateral ankle instability with subtalar instability is reliable in short term

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Anterior Talofibular Ligament Reconstruction could Produce Comparable Functional Outcomes with or without Calcaneofibular Ligament Reconstruction for Chronic Lateral Ankle Instability

Foot & Ankle Orthopaedics ◽

10.1177/2473011420s00204 ◽

2020 ◽

Vol 5 (4) ◽

pp. 2473011420S0020

Author(s):

Shi-Ming Feng

Keyword(s):

Ligament Reconstruction ◽

Ankle Instability ◽

Functional Score ◽

Anterior Talofibular Ligament ◽

Calcaneofibular Ligament ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Lateral Ankle Instability ◽

American Orthopaedic ◽

Tendon Autograft

Category: Ankle; Arthroscopy; Sports Introduction/Purpose: This study evaluates the effects on functional outcomes of with or without calcaneofibular ligament reconstruction when reconstructing the ATFL for chronic lateral ankle instability Methods: This retrospective cohort study included 48 chronic lateral ankle instability patients with later ligament reconstruction that underwent either with or without a calcaneofibular ligament reconstruction using an ipsilateral free semitendinosus tendon autograft from June 2014 to October 2017. The Visual Analogue Scale score, the American Orthopaedic Foot & Ankle Society score, Karlsson Ankle Functional Score and Anterior Talar Translation in both groups were compared. Results: All patients were followed up for at a mean of 30 months, Visual Analogue Scale score, the American Orthopaedic Foot & Ankle Society score, Karlsson Ankle Functional Score and Anterior Talar Translation between two the groups were not statistically significant different. Conclusion: There are no differences at 2.5 years in postoperative ankle function and stability when an ipsilateral free semitendinosus tendon autograft is used to manage CLAI with anterior talofibular ligament reconstruction with and without reconstructing the calcaneofibular ligament.

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The Interosseous Talocalcaneal Ligament Injury Findings in Lateral Ankle Instability with Sinus Tarsi Pain

Foot & Ankle Orthopaedics ◽

10.1177/2473011419s00039 ◽

2019 ◽

Vol 4 (4) ◽

pp. 2473011419S0003

Author(s):

Hong-Geun Jung ◽

Jong-won Lee ◽

Won Tae Song

Keyword(s):

Pain Score ◽

Ankle Instability ◽

Chronic Ankle Instability ◽

Common Finding ◽

Functional Score ◽

Lateral Ankle ◽

Sinus Tarsi ◽

Arthroscopic Findings ◽

Lateral Ankle Instability ◽

Subtalar Instability

Category: Ankle, Arthroscopy, Sports Introduction/Purpose: Lateral ankle instability (LAI) with concomitant sinus tarsi pain is a quite common finding. However, there has been few studies evaluating the subtalar arthroscopic findings for LAI with sinus tarsi pain. The purpose of the study is to evaluate the ST arthroscopic findings of chronic ankle instability with sinus tarsi syndrome. We hypothesized that chronic ankle instability with sinus tarsi pain is highly associated with interosseous talocalcaneal ligament (ITCL) tear which may be the cause for subtalar instability (STI). Methods: The study is based on 104 LAI with sinus tarsi pain ankles who had performed lateral ankle ligament stabilization. i.e. Modified Brostrum procedure (MBP), lateral ankle reconstruction (LAR) or subtalar ligament reconstruction (STR) with subtalar arthroscopic (STA) examinations from 2007 to 2018. The STA has been mainly focused on the ITCL injury and debridement of the ITCL tears and synovitis were performed when present. VAS pain score, AOFAS, Karlsson-Peterson functional score were evaluated. Results: According to the ST arthrosopic findings, ITCL tears were present in 94% (98/104) of the ankles. Lateral ankle instability (LAI), subtalar instability (STI), and LAI and STI combined were 32%, 30% and 38% respectively. MBP, LAR and STR were performed in 23%, 22% and 56% respectively. VAS pain score was improved from 5.3 to 1.9 (p<0.05). AOFAS score was improved from 67 to 89 (p<0.05), while K-P score improved from 50 to 83 (p<0.05). Sinus tarsi pain was relieved in 65% of the patients. Conclusion: We found the high incidence of the ITCL tears (98%) in LAI with sinus tarsi pain, and also diagnosed the STI in 68% of the ankles. We believe that in case of LAI with sinus tarsi pain, ST arthroscopic evaluation for ITCL tears is necessary and the possibility

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Consistency and Reliability of Ankle Stress Radiography in Patients With Chronic Lateral Ankle Instability

Orthopaedic Journal of Sports Medicine ◽

10.1177/23259671211004099 ◽

2021 ◽

Vol 9 (5) ◽

pp. 232596712110040

Author(s):

Ji Hye Choi ◽

Kug Jin Choi ◽

Chin Youb Chung ◽

Moon Seok Park ◽

Ki Hyuk Sung ◽

...

Keyword(s):

Standard Deviation ◽

Tilt Angle ◽

Ankle Instability ◽

Interobserver Reliability ◽

Initial Presentation ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Stress Radiographs ◽

Lateral Ankle Instability

Background: Ankle stress radiographs are important tools for evaluating chronic lateral ankle instability. The consistency of a patient’s ankle condition as it affects the reliability of ankle stress radiographs has never been evaluated. Purpose: To investigate the consistency and reliability of ankle stress radiographs in patients with chronic lateral ankle instability without an ankle injury during the study period. Study Design: Cohort study (diagnosis); Level of evidence, 3. Methods: Included were patients with chronic lateral ankle instability who underwent 2 repeated ankle stress radiographs between January 2014 and July 2019; those with an ankle injury during the study period were excluded. The tibiotalar tilt angle on varus stress radiographs and anterior translation of the talus on anterior drawer stress radiographs were measured at initial presentation and final follow-up examination. Interobserver reliability and consistency of ankle stress radiographs were analyzed using the intraclass correlation coefficient (ICC). Results: A total of 45 patients (mean ± standard deviation age, 36.4 ± 13.4 years; 18 men and 27 women; follow-up duration, 9.1 ± 3.2 months) were included. The mean ± standard deviation tibiotalar tilt angle and anterior talar translation at initial presentation were 10.8° ± 5.2° and 6.9 ± 2.7 mm, respectively. The interobserver reliabilities of the tibiotalar tilt angle and anterior talar translation were excellent (ICC = 0.926 [95% CI, 0.874-0.959] and 0.911 [95% CI, 0.766-0.961], respectively). The consistency between the initial and final radiographs was good for tibiotalar tilt angle (ICC = 0.763 [95% CI, 0.607-0.862]) and poor for anterior talar translation (ICC = 0.456 [95% CI, 0.187-0.660]). Conclusion: Although the interobserver reliability of the radiographic measurements was excellent, the consistency of the ankle stress radiographs was not as acceptable. Surgeons need to be cautious when deciding whether to operate on a patient with chronic lateral ankle instability based on a single ankle stress radiograph.

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Magnetic Resonance Imaging T2* Mapping of the Talar Dome and Subtalar Joint Cartilage 3 Years After Anterior Talofibular Ligament Repair or Reconstruction in Chronic Lateral Ankle Instability

The American Journal of Sports Medicine ◽

10.1177/0363546520982240 ◽

2021 ◽

Vol 49 (3) ◽

pp. 737-746

Author(s):

Yiwen Hu ◽

Yuyang Zhang ◽

Qianru Li ◽

Yuxue Xie ◽

Rong Lu ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Ankle Instability ◽

Anterior Talofibular Ligament ◽

Resonance Imaging ◽

Talar Dome ◽

Lateral Ankle ◽

Chronic Lateral Ankle Instability ◽

Lateral Ankle Instability

Background: Cartilage degeneration is a common issue in patients with chronic lateral ankle instability. However, there are limited studies regarding the effectiveness of lateral ligament surgery on preventing talar and subtalar joint cartilage from further degenerative changes. Purpose: To longitudinally evaluate talar and subtalar cartilage compositional changes using magnetic resonance imaging T2* mapping in anatomic anterior talofibular ligament (ATFL)–repaired and ATFL-reconstructed ankles and to compare them with measures in asymptomatic controls. Study Design: Cohort study; Level of evidence, 3. Methods: Between January 2015 and December 2016, patients with chronic lateral ankle instability who underwent anatomic ATFL repair (n = 19) and reconstruction (n = 20) were prospectively recruited. Patients underwent 3.0-T magnetic resonance imaging at baseline and 3-year follow-up. As asymptomatic controls, 21 healthy volunteers were recruited and underwent imaging at baseline. Talar dome cartilage was divided into (1) medial anterior, central, and posterior and (2) lateral anterior, central, and posterior. Posterior subtalar cartilage was divided into (1) central talus and calcaneus and (2) lateral talus and calcaneus. Ankle function was assessed using the American Orthopaedic Foot & Ankle Society scores. Results: There were significant increases in T2* values in medial and lateral posterior and central talus cartilage from baseline to 3-year follow-up in patients who underwent repair. T2* values were significantly higher in ATFL-repaired ankles at follow-up for all cartilage regions of interest, except medial and lateral anterior and lateral central, compared with those in healthy controls. From baseline to 3-year follow-up, ATFL-reconstructed ankles had a significant increase in T2* values in lateral central and posterior cartilage. T2* values in ATFL-reconstructed ankles at follow-up were elevated in all cartilage regions of interest, except medial and lateral anterior, compared with those in healthy controls. ATFL-repaired ankles showed a greater decrease of T2* values from baseline to follow-up in lateral calcaneus cartilage than did ATFL-reconstructed ankles ( P = .031). No significant differences in American Orthopaedic Foot & Ankle Society score were found between repair and reconstruction procedures (mean ± SD, 19.11 ± 7.45 vs 16.85 ± 6.24; P = .311). Conclusion: Neither anatomic ATFL repair nor reconstruction could prevent the progression of talar dome and posterior subtalar cartilage degeneration; however, ankle function and activity levels were not affected over a short period. Patients who underwent ATFL repair exhibited lower T2* values in the lateral calcaneus cartilage than did those who underwent reconstruction.

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Early Outcomes of Arthroscopic Modified Brostrom Operation for Chronic Ankle Instability

Foot & Ankle Orthopaedics ◽

10.1177/2473011417s000372 ◽

2017 ◽

Vol 2 (3) ◽

pp. 2473011417S0003

Author(s):

Dong-Woo Shim ◽

Yeokgu Hwang ◽

Yoo Jung Park ◽

Jin Woo Lee

Keyword(s):

Clinical Outcomes ◽

Gold Standard ◽

Ankle Instability ◽

Lateral Ankle ◽

Vas Score ◽

Lateral Ankle Instability ◽

Talar Tilt ◽

Outcome Evaluations ◽

Modified Broström Procedure

Category: Ankle, Arthroscopy Introduction/Purpose: The gold standard for the surgical treatment of chronic lateral ankle instability is the modified Brostrom procedure. Surgery aims to re-establish ankle stability and function, without compromising ankle motion. Recently introduced all inside arthroscopic modified Brostrom procedure coincide with the goal on that aspect. The purpose of this study was to investigate the early outcomes of all inside arthroscopic modified Brostrom operation for chronic ankle instability. Methods: From January 2015 to August 2016, 30 patients were included. The visual analog scale (VAS) score, American Orthopaedic Foot & Ankle Society (AOFAS) ankle–hindfoot score, Foot and Ankle Outcome Score (FAOS), and Karlsson score were used to evaluate clinical outcomes. Anterior talar translation and talar tilt were used to evaluate radiologic outcomes. All patients had lateral ankle instability. All patients had giving way, persistent pain, and an inability to resume their preinjury activity level for more than 6 months. Clinical outcome evaluations were performed preoperatively, at 3 months and 6 months postoperatively, and at a final follow-up using the VAS score, the AOFAS ankle-hindfoot score, FAOS, and Karlsson score. Radiologic outcome evaluations were performed preoperatively and at 1 year postoperatively at final follow-up using anterior talar translation, and talar tilt angle. Results: Thirty patients (19 males and 11 females) were followed up for a mean of 11.0 (range 4 – 23) months. The VAS, AOFAS, 1 FAOS subscale (Quality-of-life) and the Karlsson scores were improved significantly at the each follow-up period of 3 month, 6 month and 1 year postoperatively. Other 4 subscales of FAOS showed no significant outcomes (Table 1). The mean anterior talar translation and talar tilt showed significant improvements from 5.8 mm (SD = 0.4) and 7.9° (SD = 1.0) to 5.3 mm (SD = 0.3) and 5.7° (SD = 0.6) at the final follow-up each (p = 0.034, p=0.034). Conclusion: The arthroscopic modified Brostrom technique could be a viable alternative to the gold-standard open modified Brostrom procedure for anatomic repair of chronic lateral ankle instability. It can yield outstanding functional and clinical outcomes without adverse effects in terms of pain.

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