Ankle Arthroscopy: An Update

Deltoid ligament injuries: When and how to repair

PURPOSE

This study aims to illustrate the assessment and treatment strategies of acute and chronic deltoid ligament injuries, providing a treatment algorithm for each scenario.

METHODS

A retrospective review was conducted on 39 patients, who had either an acute deltoid ligament injury or suffered chronic deltoid ligament insufficiency. All patients were operated on between January 2016 and December 2022. The cases represent a range of different clinical scenarios, including acute trauma, chronic insufficiency or instability situations. Clinical and imaging evaluation, surgical techniques and clinical outcomes are presented.

RESULTS

The mean follow-up time was 21.3 months (±4.5). Acute trauma represented 18 (46%) of the ankles, while 21 (54%) had chronic instability. Treatment options were tailored according to the aetiology, patient characteristics, injury pattern and associated lesions. In 11 of the 18 acute deltoid ruptures (64%), repair was performed using suture anchors, while the remaining 7 cases were treated with direct suture. In chronic deltoid insufficiency, re-tensioning with suture anchor was performed in 14 (67%) ankles, suture imbrication in 5 (24%) and reconstruction in 6 (9%). The most common associated injuries were syndesmotic injuries (n = 12, 56%) and osteochondral lesions (n = 13, 36%). The complication rate was 18% (n = 7), the majority related to persistent stiffness (n = 4, 10%).

CONCLUSION

The decision on when and how to repair the deltoid ligament should be guided by the characteristics of the injury and the individual patient. The current treatment rationale may serve as a working basis for evaluating and treating these ankles.

LEVEL OF EVIDENCE

Level IV.

Open and all-inside arthroscopic Brostrom-Gould for chronic lateral ankle instability: A comparative analysis of surgical outcomes and learning curves

OBJECTIVE

The purpose of this study was to investigate and compare the learning curve and clinical outcomes of all-inside arthroscopic and open techniques in the treatment of chronic lateral ankle instability (CLAI).

METHOD

This was a retrospective cohort analysis of 100 consecutive patients who received all-inside arthroscopic or open Brostrom-Gould surgery. These patients with CLAI were all surgically treated by the same surgeon. We applied the CUSUM analysis to assess the surgeons' learning curves, determine the cut-off point, and subsequently divide the patients into learning and proficiency groups. We recorded and compared baseline data, the preoperative and postoperative clinical function scores (AOFAS, K-P, and Tegner scores), VAS scores, time to full weight-bearing, surgery-related parameters (operation time, and postoperative hospital stays), and complications for both surgical methods during their learning and proficiency phases.

RESULT

The CUSUM analysis identified a learning curve cutoff at 12 cases for open surgery and 22 cases for arthroscopic surgery. In the open surgery group, significant differences were observed in operation time between the learning and proficiency phases (P < 0.05). However, no significant differences were found in clinical function scores and postoperative full weight-bearing time. Similar trends were seen in the arthroscopic surgery group, with significant improvements in operation timeand postoperative hospitalization time in the proficiency phase compared to the learning phase (P < 0.05). However, no significant differences were found in clinical function scores between either surgical method's learning and proficiency stages. Additionally, when comparing the two surgical approaches at the same stage, significant differences emerged in VAS scores, postoperative full weight-bearing time, operation timeand postoperative hospitalization time (P < 0.05), with the arthroscopic technique showing advantages in reduced postoperative discomfort and faster recovery times.

CONCLUSION

Although arthroscopic surgery takes longer to achieve proficiency, it offers the advantages of reduced postoperative discomfort and faster recovery times during both the learning and proficiency phases while achieving comparable clinical outcomes.

Challenges and complications in arthroscopic ankle ligament repair: Current concepts

Arthroscopic ligament repair has gained popularity as a minimally invasive alternative for addressing ankle instability, due to its minimally invasive nature, which offers significant advantages over traditional open procedures. These benefits include smaller incisions, reduced soft tissue dissection, and the ability to concurrently manage intra-articular pathology, contributing to its popularity among surgeons and patients alike. Despite these advantages, the procedure presents a range of technical challenges and potential complications that can impact patient outcomes. Persistent instability, improper tensioning, and issues related to suture anchors are some of the primary concerns. Understanding these complexities and employing targeted strategies to mitigate them is essential for improving patient outcomes. Continued research and refinement of surgical techniques will play a key role in enhancing the safety and efficacy of this procedure.

Arthroscopic repair of the tibiotalar fascicle of deltoid ligament is feasible through anterior ankle arthroscopy

PURPOSE

Although arthroscopic repair of the deltoid ligament is becoming a popular procedure, no studies have assessed which bundles of the deltoid ligament can be reached by anterior ankle arthroscopy. This study aimed to assess the feasibility of the arthroscopic repair of the deep layer of the deltoid ligament. In addition, it aimed to correlate which fascicle of the superficial layer of the deltoid ligament corresponds to the deep fascicle visualised by arthroscopy.

METHODS

Arthroscopy was performed in 12 fresh frozen ankles by two foot and ankle surgeons. With the arthroscope introduced through the anterolateral portal, the medial compartment and the deltoid ligament were explored in ankle dorsiflexion without distraction. Using a suture passer introduced percutaneously, the most posterior fibres of the deep deltoid ligament visualised by anterior arthroscopy were tagged. Then, the ankles were dissected to identify the deep and superficial bundles of the deltoid ligament tagged with a suture.

RESULTS

In all specimens (100%), the intermediate part of the tibiotalar fascicle, corresponding to the fibres originating from the anterior colliculus, was tagged with a suture. The posterior part of the tibiotalar fascicle was never tagged with a suture. In all specimens, the intermediate part of the tibiotalar fascicle grasped by the suture correlated with the tibiospring fascicle of the superficial layer.

CONCLUSIONS

The current study demonstrates the feasibility of the arthroscopic repair of the deep fascicle of the deltoid ligament. By performing anterior arthroscopy, it is possible to visualise and repair the intermediate part of the tibiotalar fascicle (deep layer of the deltoid ligament). These fibres correspond to the tibiospring fascicle of the superficial layer. The clinical relevance of the current study is that the arthroscopic repair of the deep layer of the deltoid ligament is feasible through anterior ankle arthroscopy.

LEVEL OF EVIDENCE

Not applicable.

[Injuries of the ankle ligaments]

Lateral ligament injuries are the most common injuries of the ankle joint and are usually treated with early weight bearing after a short period of immobilization. If the clinical presentation is suspicious, additional injuries to the deltoid ligament complex and the syndesmosis should be considered. The indications for additional diagnostics should be generously applied. Injuries to the deltoid ligament usually occur as part of a complex ankle injury and should also be addressed in the surgical treatment of accompanying injuries. Chronic instability in this area necessitates complex bony and soft tissue procedures. Syndesmotic injuries with insufficiency of the capsule-ligament apparatus are frequent in ankle fractures and are stabilized during fracture treatment. Isolated syndesmotic instability should also be surgically treated as chronic injuries are usually associated with poor clinical results and early osteoarthritis.

Fifteen out of 16 elite athletes showed concomitant low-grade cartilage lesions of the ankle with unstable syndesmotic injuries: concerns from a prospective case series

Objectives

This study aimed to determine the incidence rate and characterise the location and severity of cartilage lesions in the ankle in elite athletes undergoing suture-button stabilisation for unstable distal syndesmotic injuries using needle arthroscopic examination. The feasibility and safety of ad hoc needle arthroscopy and its assisted interventions were also assessed.

Methods

This prospective case series included elite athletes undergoing surgical stabilisation between April 2021 and June 2023. Procedures involved suture button fixation and needle arthroscopy, conducted by a single ankle fellow-trained surgeon. Ankle cartilage lesions were graded using the Cheng and Ferkel classification and located using the nine-zone grid. The study followed the STROBE statement.

Results

This study included 16 elite athletes undergoing surgery for distal syndesmotic injuries, with 75% having acute and 25% chronic injuries. Cartilage lesions were prevalent (n=15/16, 94%), mainly at the talar dome (90%), and primarily scored as grade 1 (33%) or grade 2 (67%). Distal tibia cartilage damage occurred in 13% of cases. All patients were diagnosed with an instability of the syndesmosis confirmed through needle arthroscopy and were treated with a suture button (one or two buttons) fixation.

Conclusion

In 15/16 elite athletes with syndesmotic injuries, concomitant ankle cartilage lesions were identified through needle arthroscopy. In addition, most of the lesions were classified as grade 1 or 2, denoting superficial damage. Needle arthroscopic interventions proved feasible and safe for confirming syndesmotic instability and addressing intra-articular pathologies.

Validation of Two Novel and Complementary Training Platforms for Small Joint Arthroscopy

PURPOSE

We developed 2 complementary low-fidelity models to be used to create the tool skills needed to perform small joint arthroscopy. The purpose of the study was to establish the face and construct validity of the 2 models.

METHODS

The "foundation model" was constructed from lemon and radish sections, and the "advanced model" was constructed from a chicken knee. Using both models, novice, intermediate, and experienced participants were asked to perform specific tasks and were timed and scored on their performance. The experienced surgeons were given a 16-item survey to rate how closely each model emulated reality to determine face validity.

RESULTS

For the foundation model, the mean total time for the completion of tasks was 1,138 seconds for novices, 1,059 seconds for intermediates, and 631 seconds for experienced, with significant differences between the groups for time to complete 2 of the tasks. With a maximum possible score of 50 points for the correct performance of all tasks, the mean total performance score was 23 for novices, 31.8 for intermediates, and 42.2 for experienced operators. For the advanced model, the mean total time for completion was 266 seconds for novices, 147 seconds for intermediates, and 72 seconds for experienced participants. With a maximum possible score of 31 points for the correct performance of all tasks, the mean total performance score was 1.9 for novices, 15.0 for intermediates, and 24.3 for experienced participants. The average scores for the face validity surveys using a 5-point Likert scale were 4.2 and 4.5 of 5 possible points for the foundation and advanced models, respectively.

CONCLUSIONS

Experienced operators completed the tasks more quickly and had higher performance scores than the operators in other groups. This correlation between experience and performance suggests that both models have construct validity. The face validity scores were on the upper end of the scale, suggesting that both models emulate reality for experienced operators.

CLINICAL RELEVANCE

These novel models provide low-cost, available and valid simulations conducive to high-repetition training.

Arthroscopic all-inside ligament repair has similar or superior clinical outcomes compared to open repair for chronic ankle instability without concomitant intra-articular pathology at 5 years follow-up

PURPOSE

Open ligament repair is widely considered the gold standard treatment for chronic ankle instability. Nevertheless, arthroscopic treatment of ankle instability has gained popularity becoming the preferred technique for many surgeons. This study aimed to compare the clinical outcomes of all-inside arthroscopic versus open lateral ligament repair for chronic ankle instability at 5 years follow-up.

METHODS

Ninety consecutive patients were surgically treated for chronic ankle instability without concomitant intra-articular pathology observed on MRI: 41 patients [median age 28 (range 15-54) years] underwent an open lateral ligament repair (OLR); 49 patients [median age 30 (range 19-47) years] underwent an all-inside arthroscopic ligament repair (ALR). Functional outcomes using the Foot Functional Index (FFI), the American Orthopaedic Foot and Ankle Society (AOFAS) Hindfoot Score, and the Foot and Ankle Ability Measure-Sports Subscale (FAAM-SS) were assessed preoperatively and at the latest follow-up. At the latest follow-up, the satisfaction rate and complications were also recorded.

RESULTS

The mean follow-up was 58 ± 17.6 (range 47-81) months. In both groups FFI, AOFAS and FAAM-SS score significantly improved compared to preoperative values (p < 0.001). There was no statistically significant difference in postoperative outcomes between groups in the AOFAS (n.s) and FAAM-SS (n.s), but the FFI results were significantly better in the ALR group (p < 0.05). No major complications were reported in either group.

CONCLUSION

Open and arthroscopic ligament repair to treat chronic ankle instability without concomitant intra-articular pathology produced excellent comparable clinical outcomes at 5 years follow-up. The complications were minimal in both study groups with no significant differences in AOFAS and FAAM-SS scores. However, arthroscopic repair showed significantly better results on the FFI. Therefore, when treating chronic lateral ankle instability, surgeons should consider arthroscopic ligament repair.

LEVEL OF EVIDENCE

III.

Continuous detrimental activity of intra-articular fibrous scar tissue in correlation with posttraumatic ankle osteoarthritis

Posttraumatic osteoarthritis is primarily characterized by articular cartilage destruction secondary to trauma or fracture events. Even while intra-articular scar tissue can be observed following ankle fractures, little is known about its nature and molecular events linking its biological activity and cartilage deterioration. Here, we investigated scar tissue's histological and molecular characteristics, and its relationship with localized articular cartilage alterations consistent with early osteoarthritic degeneration. Intra-articular scar tissues from sixty-two patients who underwent open reduction internal fixation for ankle fracture were obtained at hardware removal time (6-44 months after fracture). Histological analysis demonstrated that scar tissue has the nature of fibrosis with fibrous tissue hyperplasia, fibroblast proliferation, and chondrometaplasia. These fibrous scar tissues showed overexpressed pro-inflammatory cytokines and high mRNA expression levels of osteoarthritis-related markers (cytokines, chemokines, and enzymes) compared to the normal synovium. Furthermore, those transcriptional levels were significantly correlated with the grade of talar chondral degeneration. Our findings suggest that following an ankle fracture, the intra-articular fibrous scar tissue exhibits high catabolic and inflammatory activity, which has a long-lasting negative impact correlated to cartilage deterioration in the development of posttraumatic osteoarthritis.

Comparison of arthroscopic and open Brostrom-Gould surgery for chronic ankle instability: a systematic review and meta-analysis

BACKGROUND

Approximately 20% of acute ankle sprains progress to chronic lateral ankle instability (CLAI) requiring surgical intervention. There has been growing interest among surgeons regarding whether arthroscopic techniques can replace open Brostrom-Gould surgery in treating CLAI. The purpose of this study was to pool the results of multiple studies comparing the treatment effects of these two fixation approaches.

METHODS

Our study involved thorough searches across multiple electronic databases, including PubMed, Cochrane, Embase, and Web of Science, to identify all relevant publications on CLAI that were repaired using the arthroscopic or open Broström-Gould technique. Through a comprehensive meta-analysis, we evaluated several outcomes, including post-operative function, radiological measurements, complications, and time efficiency.

RESULT

A total of 686 patients from 11 studies were included in the analysis. Among them, 351 patients underwent open repair, and 335 underwent arthroscopic Brostrom-Gould surgery. The present study revealed that arthroscopic and open Brostrom-Gould techniques demonstrated no significant differences in talar tilt, talar anterior translation, complication rate, and time to return to previous level of activity. Furthermore, no significant differences were observed in AOFAS, K-P, VAS, and Tegner scores at the 2-year follow-up. However, significant differences were noted between the two surgical approaches in terms of early weight-bearing (WMD = - 1.33 weeks, 95% CI = [- 1.91, - 0.76], P = 0.17, I2 = 40%), as well as AOFAS scores (WMD = 1.00, 95% CI = [0.05, 1.95], P = 0.73, I2 = 0%), K-P scores (WMD = 1.57, 95% CI = [0.49, 2.64], P = 0.15, I2 = 47%), and VAS scores (WMD = - 0.15, 95% CI = [- 0.60, 0.29], P < 0.08, I2 = 61%) within the first postoperative year.

CONCLUSIONS

Our findings support that arthroscopic repair yields comparable outcomes to open surgery. Consequently, we advocate for adopting arthroscopic repair as a preferred alternative to the conventional open Broström-Gould procedure for treating chronic lateral ankle instability.

Ankle Joint Microinstability: You Might Have Never Seen It but It Has Definitely Seen You

Ankle microinstability results from the superior fascicle of anterior talofibular ligament (ATFL) injury and is a potential cause of chronic pain and disability after an ankle sprain. Ankle microinstability is usually asymptomatic. When symptoms appear, patients describe a subjective ankle instability feeling, recurrent symptomatic ankle sprains, anterolateral pain, or a combination of them. A subtle anterior drawer test can usually be observed, with no talar tilt. Ankle microinstability should be initially treated conservatively. If this fails, and because superior fascicle of ATFL is an intra-articular ligament, an arthroscopic procedure is recommended to address.

Comparison of Visibility and Risk of Neurovascular Tissue Injury Between Portals in Needle Arthroscopy of the Anterior Ankle Joint: A Cadaveric Study

Background

For needle arthroscopy with 0° viewing, the visible range of intra-articular structures and the difference between portals remain unknown, as do the risks for neurovascular tissue at each portal.

Purpose

To clarify the visibility and safety of needle arthroscopy.

Study Design

Descriptive laboratory study.

Methods

Ten cadaveric ankle specimens were used. A needle arthroscope with a 1.9-mm diameter was inserted from 4 portals (anteromedial [AM], anterolateral [AL], medial midline [MM], and anterocentral [AC]). Visibility was assessed using a 15-point ankle arthroscopy checklist. In addition, the ankles were dissected to measure the distance between each portal and neurovascular tissues. The visibility of the ankle joint was compared between portals.

Results

The success rate of visibility in the deltoid ligament and the tip of the medial malleolus was 100% from the AM, MM, and AC portals and 10% from the AL portal, with significant differences between the portals (P < .01). The visibility success rates in the origin of the anterior talofibular ligament and the tip of the lateral malleolus were 20% for the AM portal, 90% for the MM and AC portals, and 100% for the AL portal, with significant differences between the portals (P < .01). All other points of the ankle joint were visualized from all the portals with a 100% success rate. The AC portal was in contact with the anterior neurovascular bundle in 4 of the 10 specimens.

Conclusion

When needle arthroscopy was performed from the AM or AL portal, the site opposite to the portal in the ankle joint was difficult to visualize. Conversely, most points of the ankle joint could be visualized from the MM and AC portals. Care should be taken when creating an AC portal because of its proximity to the anterior neurovascular bundle.

Clinical Relevance

The present study provides information regarding which portal should be selected to perform needle arthroscopy in the ankle joint, which will be beneficial for management of ankle injuries.

The Frequency and Severity of Complications in Surgical Treatment of Osteochondral Lesions of the Talus: A Systematic Review and Meta-Analysis of 6,962 Lesions

OBJECTIVE

The primary aim was to determine and compare the complication rate of different surgical treatment options for osteochondral lesions of the talus (OLTs). The secondary aim was to analyze and compare the severity and types of complications.

DESIGN

A literature search was performed in MEDLINE (PubMed), EMBASE (Ovid), and the Cochrane Library. Methodological quality was assessed using the Methodological Index for Non-Randomized Studies (MINORS). Primary outcome was the complication rate per surgical treatment option. Secondary outcomes included the severity (using the Modified Clavien-Dindo-Sink Complication Classification System for Orthopedic Surgery) and types of complications. The primary outcome, the severity, and the sub-analyses were analyzed using a random effects model. A moderator test for subgroup-analysis was used to determine differences. The types of complications were presented as rates.

RESULTS

In all, 178 articles from the literature search were included for analysis, comprising 6,962 OLTs with a pooled mean age of 35.5 years and follow-up of 46.3 months. Methodological quality was fair. The overall complication rate was 5% (4%-6%; treatment group effect, P = 0.0015). Analysis resulted in rates from 3% (2%-4%) for matrix-assisted bone marrow stimulation to 15% (5%-35%) for metal implants. Nerve injury was the most observed complication.

CONCLUSIONS

In 1 out of 20 patients treated surgically for an OLT, a complication occurs. Metal implants have a significantly higher complication rate compared with other treatment modalities. No life-threatening complications were reported.

Arthroscopic vs. open Broström-Gould for repairing anterior talofibular ligament: mid-term outcomes comparison

Introduction

There have been few mid-term follow-up studies comparing arthroscopic and open Broström-Gould repair of the anterior talofibular ligament (ATFL). The purpose of this study was to evaluate the mid-term therapeutic effectiveness of arthroscopic ATFL repair with open Broström-Gould repair for chronic lateral ankle instability.

Methods

We retrospectively reviewed the database of patients with chronic lateral ankle instability undergoing repair of the ATFL from June 2014 to June 2018. The choice of surgical approach will depend on computer-generated randomization. In total, 49 patients underwent the arthroscopic Brostrom-Gould technique (group AB), while the other 50 patients underwent the open Broström-Gould technique (group OB). The surgery duration, hospitalization time, postoperative complications, the preoperative/postoperative manual anterior drawer test (ADT), Visual analog scale (VAS) scores, American Orthopaedic Foot & Ankle Society (AOFAS) scores, Karlsson-Peterson (K-P) scores, and Tegner activity scores were collected for comparative analysis during the follow-up period of 48 months.

Results

At the final follow-up, the clinical outcomes, including ADT, VAS, AOFAS, K-P, and Tegner activity scores, were significantly improved after either arthroscopic or open treatment. Specifically, the AOFAS and K-P scores in the group AB were significantly higher than those in the group OB at 6 months post-surgery (P < 0.05). Additionally, there were no significant differences in other clinical outcomes and postoperative complications between the two groups.

Conclusions

Arthroscopic has predictable and good mid-term results after ATFL and may be a secure and effective alternative to open Broström-Gould repair.

Rotational ankle instability: A current concept review

Ankle sprains are extremely common. It is important to have a clear insight of the course of recovery after such injury to evaluate the effective strategies to guide management decisions, and understand the potential risk factors involved in the development of chronic problems and recurrent ankle sprains. When a prompt diagnosis is not formulated, ligament tears can remain untreated, and chronic ankle instability can result after acute lateral or medial ankle sprain. When the medial ligament complex (MLC), in particular the anterior fascicle of the deltoid ligament, is involved, rotational ankle instability (RAI) can develop. Generally, a tear of the anterior fibres of the MCL accompanied by anterior talofibular ligament (ATFL) insufficiency has been associated with RAI, while injury of the intermediate fibres of the MLC has been associated with medial ankle instability (MAI). Conservative management is the first line of treatment, with surgery reserved for special cases or if rehabilitation has failed. Regarding surgery, several options are available, including anatomic repair, anatomic reconstruction, and tenodesis procedures. Ankle arthroscopy is increasingly used to address ligament insufficiency and to identify and treat intra-articular pathologies. Repair of MLC tears by an arthroscopic all-inside procedure is effective in both MAI and RAI.

Complications following ankle arthroscopy

This systematic review aimed to summarize the full range of complications reported following ankle arthroscopy and the frequency at which they occur. A computer-based search was performed in PubMed, Embase, Emcare, and ISI Web of Science. Two-stage title/abstract and full-text screening was performed independently by two reviewers. English-language original research studies reporting perioperative complications in a cohort of at least ten patients undergoing ankle arthroscopy were included. Complications were pooled across included studies in order to derive an overall complication rate. Quality assessment was performed using the Oxford Centre for Evidence-Based Medicine levels of evidence classification. A total of 150 studies describing 7,942 cases of ankle arthroscopy in 7,777 patients were included. The overall pooled complication rate was 325/7,942 (4.09%). The most common complication was neurological injury, accounting for 180/325 (55.4%) of all complications. Of these, 59 (32.7%) affected the superficial peroneal nerve. Overall, 36/180 (20%) of all nerve injuries were permanent. The overall complication rate following anterior ankle arthroscopy was 205/4,709 (4.35%) compared to a rate of 35/528 (6.6%) following posterior arthroscopy. Neurological injury occurred in 52/1,998 (2.6%) of anterior cases using distraction, compared to 59/2,711 (2.2%) in cases with no distraction. The overall rate of major complications was 16/7,942 (0.2%), with the most common major complication - deep vein thrombosis - occurring in five cases. This comprehensive systematic review demonstrates that ankle arthroscopy is a safe procedure with a low overall complication rate. The majority of complications are minor, with potentially life-threatening complications reported in only 0.2% of patients.

Individual fascicles of the ankle lateral ligaments and the lateral fibulotalocalcaneal ligament complex can be identified on 3D volumetric MRI

PURPOSE

Lateral ligament ankle sprains are common and the anatomy on imaging studies is vital for accurate diagnosis. The lateral fibulotalocalcaneal ligament (LFTCL) complex consists of the inferior fascicle of the anterior talofibular ligament (ATFL) which is connected by arciform fibres with the calcaneofibular ligament (CFL). The superior fascicle of ATFL is an independent structure that should be assessed individually. MRI evaluation of these distinct fascicles and the arciform fibres has not been described. The aim of this study is to identify the anatomical relationship of these components of the LFTCL complex in healthy individuals on MRI.

METHODS

Thirty ankles from healthy volunteers were imaged using 3D volumetric MRI. The ATFL fascicles and size were evaluated. Presence of arciform fibres connecting the inferior ATFL fascicle and CFL to form the LFTCL complex and anatomical relationship around the lateral ligament complex were assessed.

RESULTS

Both the superior and inferior ATFL fascicles were observed in 26 (86.7%) ankles. The superior ATFL fascicle was significantly larger in all specimens (39% longer and 80.7% wider). For the specimens with a single fascicle, this was similar in size to the superior fascicle observed in the other 26 specimens. These measurements were not affected by age or gender. Arciform fibres of the LFTCL complex were identified in 22 (84.6%) specimens with two ATFL fascicles and three (75%) ankles with a single ATFL fascicle. Connecting fibres from the ATFL to PTFL were observed in 19 (63.3%) ankles while connections between the CFL and PTFL were identified in 21 (70%) ankles. Five ankles had a perforating artery visualized in the intervening space between the superior and inferior ATFL fascicles (a branch of the lateral tarsal artery of the dorsalis pedis artery).

CONCLUSION

Two distinct ATFL fascicles may be identified in the majority of ankles on MRI. Isolated injury to the superior fascicle identified on MRI may be useful when diagnosing patients presenting with symptoms of subtle instability without overt ankle laxity on clinical examination. The current study is the first to identify the arciform fibres of the LFTCL complex supporting isolated ATFL repair in the presence of intact LFTCL complex.

LEVEL OF EVIDENCE

Level III.

Presurgical Perspective and Postsurgical Evaluation of Instability and Microinstability Secondary to Ankle Ligaments Injury

Injuries of the ankle ligaments complexes are very common, and ∼ 20 to 40% of patients can develop chronic ankle instability (CAI). Current concepts in CAI allow a better understanding of the ankle biomechanics needed to repair it. The surgical treatment of CAI has evolved in the last decade, and ankle arthroscopy has become an essential tool in the treatment of instability with promising results. We review the different surgical techniques to treat CAI, both those frequently used and the new approaches, as well as the normal postsurgical appearance of ankle ligaments repair and the most common complications.

The Role of Distraction Arthroplasty in Managing Ankle Osteoarthritis

Ankle distraction arthroplasty (DA) is a joint-preserving option for the treatment of ankle osteoarthritis. The ideal patient is a young, active person who is compliant with follow-up and understands that clinical improvements may not be fully evident until 1 year after surgery. The procedure promotes cartilage healing and regeneration by removing mechanical stress at the joint surface through the application of a joint-spanning external fixator. There is an array of adjuvant procedures commonly performed to optimize healing potential-including microfracture, osteophyte removal, osteotomies, and soft tissue balancing procedures. Short- and intermediate-term studies have been promising, though there is a wide variance in reported failure and complication rates.

Arthroscopic Assessment and Treatment of Medial Collateral Ligament Complex

An increased interest in ankle instability has led to description of new concepts such as ankle microinstability or rotational ankle instability and the development of new arthroscopic techniques treating ankle instability. Ankle instability is constantly associated to intraarticular pathologies that contribute to generate pain and dysfunction. Arthroscopy plays an important role in identifying and treating all intraarticular abnormalities including ligament injuries. Despite a few studies are available in literature on arthroscopic treatment of medial collateral ligament injury, an arthroscopic all-inside repair of lateral and medial ankle ligaments has been proposed showing promising clinical results.

Nerve lesions during arthroscopic procedure: a literature overview

Arthroscopy is more and more popular. Although minimally-invasive, it's not completely free of complications as nerves lesions which can be invalidating for the patient and frustrating for the surgeon with significant economic, psychological and medico-legal implications. The purpose was to review the literature about nerve injuries related to arthroscopy. A scientific literature review was performed in PubMed/Medline, including articles dealing with cases of iatrogen lesions of the peripheral nerves occurred during arthroscopic procedures. These lesions are mainly due to direct damage by nerve section while cutting for making the portals or during surgical maneuvers, or indirect damage due to traction or pressure mechanisms especially for errors in patient positioning. Also the tourniquet can lead to compression and ischemic nerve injury. Arthroscopy can cause both transient and permanent neurological lesions manifested with dysesthesia up to paralysis according to Seddon's classification in neuroapraxia, axonotmesis and neurotmesis. Incidence of complications in general and of nerve injuries during arthroscopy are reported by joint. A rigorous respect for surgical technique and all perioperative precautions, particularly in relation to the positioning of the patient, greatly reduce the risk of nerve injury. The suggested waiting time before surgical nerve revision is 6 months. In the meanwhile the patient should perform physiotherapy constantly and improvements should be evaluated with clinical examination and electromyography 15-20 days after the lesion, and thereafter at 3 and 6 months.

Ankle microinstability: arthroscopic findings reveal four types of lesion to the anterior talofibular ligament's superior fascicle

PURPOSE

ATFL's superior fascicle injury has been considered to be the underlying cause in cases of ankle microinstability. As its clinical diagnosis can be difficult, arthroscopic examination may be the only objective diagnostic tool. The purpose of this study was to determine what types of injuries to the ATFL's superior fascicle are associated with ankle microinstability, and to provide the reader with an arthroscopic classification of the types of microinstability affecting the ankle.

METHODS

Ankle arthroscopy video records obtained during a four-year period from 232 patients with the diagnosis of ankle microinstability were reviewed. The characteristics of the ATFL's superior fascicle injury were identified, described and recorded along with any concomitant intra-articular pathology.

RESULTS

Four different injury patterns were consistently seen affecting the ATFL's superior fascicle. These ranged from ligament attenuation associated with loss of tension (type I), through to partial detachment (type II) or total detachment (type III) from the fibula. Finally, a total or partial resorption of the ATFL's superior fascicle (type IV) was also observed. There was a statistically significant association between the type of injury identified and the rate of intra-articular pathology observed arthroscopically. Equally, the higher the type in the classification, the higher the rate of loose bodies, lateral talar OCD, deltoid "open book" tears, and anterior soft-tissue formation.

CONCLUSION

Different types of ATFL's superior fascicle injury can be observed in patients with ankle microinstability, ranging from ligament attenuation associated with a loss of tension (8.2%) to different degrees of partial (69.1%) and total (16.8%) ligament detachment from the fibula, or ligament remnant resorption (5.9%). As the type of injury progresses along with the proposed classification, the rate of intra-articular injuries also increases. The clinical relevance of this study is that a morphological ATFL's superior fascicle tear is recognized in patients with the diagnosis of ankle microinstability.

LEVEL OF EVIDENCE

IV.

Anterior and Posterior Arthroscopic Treatment of Primary Synovial Chondromatosis of the Ankle

BACKGROUND

Primary synovial chondromatosis (PSC) is a progressive disorder of unknown etiology resulting in formation of multiple loose bodies. If left untreated, it may lead to degenerative changes or malignant transformation to chondrosarcoma.

METHODS

Seventeen patients who underwent combined posterior and anterior ankle arthroscopy within the same operative session and had histologically confirmed PSC were included in this retrospective study. American Orthopaedic Foot & Ankle Society (AOFAS) Ankle-Hindfoot score was used to evaluate ankle function preoperatively and at a final follow-up. A 3-question survey was used to evaluate patient's satisfaction at the final follow-up.

RESULTS

In 14 patients, loose bodies were found in both compartments of the ankle, in 2 only in the anterior compartment, and in 1 only in the posterior compartment. All patients had evident signs of synovial inflammation in both compartments. The AOFAS Ankle-Hindfoot score increased from the preoperative median score of 65 (range, 29-90) to 95 (range, 65-100) at the final follow-up. Fourteen patients reported they were extremely satisfied with the outcome, 1 was moderately satisfied, and 2 were dissatisfied. No cases of recurrence of synovitis or loose body formation were noted, nor any signs of malignant transformation during the follow-up period.

CONCLUSION

We believe the risk of recurrence of PSC, which is in close relation to malignant transformation, can be minimized by performing a complete synovectomy of the ankle. Our experience and review of literature makes us believe that ankle PSC should be regarded as a whole joint disorder. Performing a combined posterior and anterior arthroscopic procedure within the same operative session should always be considered in patients with ankle PSC.

LEVEL OF EVIDENCE

Level IV, retrospective case series.

Role of Arthroscopy in Various Ankle Disorders

INTRODUCTION

Ankle arthroscopy has come a long way since it was thought, it is not feasible because of tight joint and anatomical characteristics of ankle joint. The same anatomical features like capsular attachment and safe accessory portals are used to access the whole joint even with a rigid arthroscope. Ankle distraction method was routinely used to access the anterior ankle. However, nowadays, anterior arthroscopy is done in dorsiflexion as this increases the anterior ankle joint volume, and thereby easy access to various anatomical structures. On the other hand, intermittent traction is used to access the posterior ankle. Initially used as a diagnostic tool, ankle arthroscopy is now used extensively as a therapeutic and reconstruction tool. New evidence is published for all inside ligament reconstructions, effective management of impingement syndromes, and osteochondral lesions. The indications are being extended to fracture management and arthrodesis.

METHODOLOGY

This narrative review was performed following a literature search in the Pubmed database and Medline using the following keywords: ankle arthroscopy, portals, ankle OCD, functional outcome. Related articles were then reviewed.

CONCLUSION

Complications rate is reduced with a better understanding of the relative anatomy of surrounding neurovascular structures and tendons with regard to the position of ankle joint. This review on ankle arthroscopy focuses on anatomy, indications, and complications. Ankle arthroscopy is a safe and elegant tool as any other joint arthroscopy.

All-Inside Arthroscopic Modified Broström Technique to Repair Anterior Talofibular Ligament Provides a Similar Outcome Compared With Open Broström-Gould Procedure

PURPOSE

To introduce an all-inside modified Broström technique to suture the anterior talofibular ligament (ATFL) and inferior extensor retinaculum (IER) under arthroscopy and to compare its outcomes with those of the conventional open procedure.

METHODS

All patients who underwent arthroscopic or open repair of the ATFL between June 2014 and December 2017 were included in this study. Visual analog scale (VAS), Karlsson and Peterson (K-P), American Orthopedic Foot and Ankle Society (AOFAS) ankle/hindfoot, and Tegner activity scores, as well as manual anterior drawer test (ADT), were used to evaluate the patients preoperatively and ≥2 years after surgery. The Sefton grading system was used to assess the level of satisfaction after surgery. Detailed surgical data and intraoperative findings were documented at the time of surgery.

RESULTS

A total of 67 patients, 31 in the arthroscopic group and 36 in the open group, were included in this study (43 men and 24 women, mean body mass index 24.00, range 19.53 to 30.03). The surgical duration in the arthroscopic group (median, 34 minutes; range, 25 to 74) was significantly shorter than that in the open group (mean, 43.08 ± 8.11 minutes; 95% confidence interval [CI] 40.34 to 45.83) (P = .007). At the last follow-up, the subjective functional scores and ADT results improved significantly in both cohorts (P < .001). However, no significant difference was found in the VAS score (1.74 ± 1.24, 95% CI 1.29 to 2.2, in the open group versus 1.58 ± 1.2, 95% CI 1.18 to 1.99, in the arthroscopic group; P = .581), AOFAS score (91.71 ± 5.46, 95% CI 89.71 to 93.71, versus 90.67 ± 5.59, 95% CI 88.78 to 92.56; P = .444), K-P score (87.52 ± 7.59, 95% CI 84.73 to 90.3, versus 88.75 ± 5.56, 95% CI 86.87 to 90.63; P = .446), and ADT evaluation (normal: 96.77% versus 94.44%, P = .557) between the arthroscopic and open groups, respectively. In addition, 28 cases (90.32%) in the arthroscopic group and 32 (88.89%) in the open group achieved satisfactory results based on the Sefton grading system (P = .736). Seventeen patients (47.2%) in the open group and 18 patients (58.1%) in the arthroscopic group underwent Tegner evaluation after surgery, which showed no significant difference (5, interquartile range [IQR] 1 in the open group versus 5, IQR 3 in the arthroscopic group; P = .883). Complications were reported in 4 (11.1%) and 2 (6.5%) patients who underwent open and arthroscopic surgeries, respectively (P = .813).

CONCLUSIONS

Both open and arthroscopic modified Broström surgeries generated favorable outcomes, with a significant improvement compared with the preoperative condition. Compared with the open Broström-Gould procedure, the all-inside arthroscopic modified Broström technique produced equivalent functional and clinical results at a minimum of 2 years after the operation, with a shorter surgical duration. Arthroscopic repair might be a safe and viable alternative to open surgery for lateral ankle stabilization.

LEVEL OF EVIDENCE

III.

Chronic Lateral Ankle Instability: Topical Review

Chronic ankle instability can result from untreated or badly managed acute lateral ankle ligament injuries. Conservative management is the modality of choice for acute lateral ankle ligament injuries, and operative treatment is reserved for special cases. Failure after strict rehabilitation may be an indication for surgery. Several operative options are available, including anatomic repair, anatomic reconstruction, and tenodesis procedures. Anatomic repair can be performed when the quality of the damaged ligaments permits. Anatomic reconstruction with an autograft or allograft should be considered when the torn ligaments are not adequate. Ankle arthroscopy is a useful adjunct to ligamentous procedures, performed at the time of repair to identify and treat intra-articular conditions that may be associated with chronic ankle instability. Tenodesis techniques are not recommended because of their suboptimal long-term results related to the modification of ankle and hindfoot biomechanics.Level of Evidence: Level V, expert opinion.

Arthroscopic-Assisted Versus All-Arthroscopic Ankle Stabilization Technique

BACKGROUND

Both the percutaneous technique with arthroscopic assistance, also known as arthroscopic Broström (AB), and the arthroscopic all-inside ligament repair (AI) are widely used to treat chronic lateral ankle instability. The aim of this study was to compare the clinical outcomes of these 2 arthroscopic stabilizing techniques.

METHODS

Thirty-nine consecutive patients were arthroscopically treated for chronic ankle instability by 2 different surgeons. The AB group comprised 20 patients with a mean age of 30.2 (range, 18-42) years and a mean follow-up of 19.6 (range, 12-28) months. The AI group comprised 19 patients with a mean age of 30.9 (range, 18-46) years and mean follow-up of 20.7 (range, 13-32) months. Functional outcomes using the American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot score and visual analog pain scale (VAS) were assessed pre- and postoperatively. Range of motion (ROM) and complications were recorded.

RESULTS

In both groups the AOFAS and VAS scores significantly improved compared with preoperative values (P < .001) with no difference (P > .1) between groups. In the AB group the mean AOFAS score improved from 67 (range, 44-87) to 92 (range, 76-100) and the mean VAS score from 6.4 (range, 3-10) to 1.2 (range, 0-3). In the AI group the mean AOFAS score changed from 60 (range, 32-87) to 93 (range, 76-100) and the mean VAS score from 6.1 (range, 4-10) to 0.8 (range, 0-3). At the final follow-up 8 complications (40%) were recorded in the AB group. In the AI group 1 complication (5.3%) was observed (P < .05).

CONCLUSION

Both the AB and AI techniques are suitable surgical options to treat chronic ankle instability providing excellent clinical results. However, the AB had a higher overall complication rate than the AI group, particularly involving a painful restriction of ankle plantarflexion and neuritis of the superficial peroneal nerve.

LEVEL OF EVIDENCE

Level III, retrospective comparative study.

Arthrofibrosis of the Ankle

Arthrofibrosis is a common, but often overlooked, condition that imparts significant morbidity following injuries and surgery to the foot and ankle. The most common etiologies are related to soft tissue trauma with subsequent fibrotic and contractile scar tissue formation within the ligaments and capsule of the ankle. This leads to pain, alterations in gait, and ankle dysfunction. Initial treatment often includes extensive physical therapy, however, if severe enough surgical options exist. Although the literature regarding ankle arthrofibrosis is scarce, this review article provides a greater understanding of the pathogenesis of arthrofibrosis and describes the current and future therapeutic options to treat fibrotic joints. Level of Evidence: Level V, expert opinion.

Anterocentral Portal in Ankle Arthroscopy

BACKGROUND

The anterocentral portal is not a standard portal in anterior ankle arthroscopy due to its proximity to the anterior neurovascular bundle. However, it provides certain advantages, including a wide field of vision, and portal changes become redundant. The purpose of this study was to evaluate the neurovascular complications after anterior ankle arthroscopy using the anterocentral portal.

METHODS

We retrospectively identified patients who had undergone anterior ankle arthroscopy with an anterocentral portal at our institution from 2013 to 2018. Medical record data were reviewed and patients were invited for clinical follow-up, where a clinical examination, quantitative sensory testing for the deep peroneal nerve, and ultrasonography of the structures at risk were performed. A total of 101 patients (105 arthroscopies) were identified and evaluated at a mean follow-up of 31.5 ± 17.7 months.

RESULTS

Leading indications to surgery were heterogeneous and included anterior impingement (48.6%), osteochondral lesions of the talus (24.8%), chronic ankle instability (14.3%), and fractures (8.6%). The overall complication rate was 7.6%, and no major complications were observed. In 1.9% (2/105) of the cases, the complications were associated with the anterocentral portal and included injury to the medial branch of the superficial nerve (1/105) and to the deep peroneal nerve (1/105). Injury to the deep peroneal nerve was associated with a loss of detection and nociception. There were no injuries to the anterior tibial artery. In 41.9% (44/105) of the cases, only 1 working portal was used in addition to the anterocentral portal, and in 19% (20/105) the anterolateral portal could be avoided. Ultrasonography confirmed the integrity of the deep peroneal nerve, the medial branch of the superficial peroneal nerve, and the anterior tibial artery in all patients. Patients with nerve injuries associated with the anterocentral portal showed no signs of neuroma or pseudoaneurysm.

CONCLUSION

Using a standardized technique, the anterocentral portal in ankle arthroscopy is safe with a low number of neurovascular injuries and can be recommended as a standard portal. The anterolateral portal remains associated with a high number of injuries to the superficial peroneal nerve.

LEVEL OF EVIDENCE

Level III, retrospective cohort study.

Peripheral Nerve Stimulation for the 21st Century: Sural, Superficial Peroneal, and Tibial Nerves

OBJECTIVE

Peripheral nerve stimulation (PNS) of the lower extremity has progressed significantly over the last decade. From the proof of concept that ultrasound-guided, percutaneous implantation was possible to advances in waveforms, the field has been rapidly evolving. While most nerves in the lower extremity can be PNS targets, consideration must be given to the ergonomics of pulse generator placement, patient comfort, and avoidance of lead migration. For this paper, we examine some of the conditions amenable to lower extremity PNS, review the evidence and history behind PNS for these conditions, and describe approaches for the tibial, sural, and superficial peroneal nerves.

METHODS

A literature search was conducted using PubMed. Search terms used were "peripheral nerve stimulation," "lower extremity entrapment neuropathies," "sural nerve," "superficial peroneal nerve," "tibial nerve," and "tarsal tunnel syndrome." Emphasis was placed on randomized controlled studies, anatomical dissections, and comprehensive review articles. Approaches to nerves and ultrasound images were based on anecdotal PNS cases from an experienced implanter (SP).

CONCLUSIONS

The development of ultrasound as a viable method of image guidance for percutaneous peripheral nerve stimulation has led to an exponential growth in the field. Lower extremity percutaneous lead placement is both feasible and an appropriate treatment modality for certain pain conditions.

Arthroscopically Assisted Tape Augmentation for Anterior Talofibular Ligament Repair

In this Technical Note, we describe arthroscopically assisted tape augmentation of a modified Broström repair for chronic lateral ankle instability. Specifically, this technique involves talar anchor placement under direct arthroscopic visualization combined with a minimally invasive approach for anatomic anterior talofibular ligament repair and FiberTape (Arthrex, Naples, FL) augmentation. The primary advantage of our technique compared with open InternalBrace (Arthrex) techniques is that only a 2-cm incision is made and no subcutaneous suture passing and knot tying are required, which bear the danger of superficial peroneal nerve damage. In addition, the risk of nonanatomic anchor placement is diminished owing to direct arthroscopic visualization and preparation of the anterior talofibular ligament remnants.

Lower nationwide rates of arthroscopic procedures in 2016 compared with 1997 (634925 total arthroscopic procedures): has the tide turned?

Objectives

To assess the rates and secular trends of different joint arthroscopies—shoulder, elbow, wrist, hip, knee and ankle—in Finland between 1997 and 2016.

Design

Retrospective nationwide registry study.

Participants

All adults in Finland with any arthroscopic intervention procedure code for knee, shoulder, ankle, wrist, elbow or hip arthroscopy between 1 January 1997 and 31 December 2016 were included.

Main outcome measures

Incidence rate of arthroscopic surgery per 100 000 person-years.

Results

The rate of knee and shoulder arthroscopies declined after reaching a peak in 2006 and 2007, respectively. The rates of wrist, elbow and hip joint arthroscopies declined after their 2014 peak. At the same time, the median age of patients who had knee, ankle and hip arthroscopy decreased, whereas the age of patients who had shoulder arthroscopy increased.

Conclusions

Numerous randomised controlled trials point to lack of efficacy of the most common knee and shoulder arthroscopic procedures. It should not be assumed that this has contributed to decreased rates of arthroscopic surgery. The concurrent decrease in most of the other joint arthroscopic procedures was unexpected.

Redefining anterior ankle arthroscopic anatomy: medial and lateral ankle collateral ligaments are visible through dorsiflexion and non-distraction anterior ankle arthroscopy

PURPOSE

A thorough understanding of the arthroscopic anatomy is important to recognise pathological conditions. Although some ankle ligaments have been described as intra-articular structures, no studies have assessed the full visibility of these structures. The purpose of this study was to assess arthroscopic visibility of medial and lateral ankle collateral ligaments.

METHODS

Arthroscopy was performed in 20 fresh frozen ankles. The arthroscope was introduced through the anteromedial portal and the anterior compartment was explored in ankle dorsiflexion without distraction. Intra-articular structures were tagged using a suture-passer introduced percutaneously and they were listed in a table according to the surgeon's identification. After the arthroscopic procedure, the ankles were dissected to identify the suture-tagged structures.

RESULTS

According to the suture-tagged structures, 100% correlation was found between arthroscopy and dissection. In the anterior compartment, the superior fascicle of the anterior talofibular ligament, the distal fascicle of the anterior tibiofibular ligament and the anterior tibiotalar ligament on the medial side were observed. The deep fascicle of the posterior tibiofibular ligament and the intermalleolar ligament were tagged at the posterior compartment.

CONCLUSION

Ankle dorsiflexion and non-distraction arthroscopic technique allows full visualisation of the medial and lateral ankle collateral ligaments: the superior fascicle of the anterior talofibular ligament, the distal fascicle of the anterior tibiofibular ligament and the anterior tibiotalar ligament. When using distraction, posterior structures as the deep fascicle of the posterior tibiofibular ligament and the intermalleolar ligament can be observed with anterior arthroscopy.

The lateral fibulotalocalcaneal ligament complex: an ankle stabilizing isometric structure

PURPOSE

Ankle lateral collateral ligament complex has been the focus of multiple studies. However, there are no specific descriptions of how these ligaments are connected to each other as part of the same complex. The aim of this study was to describe in detail the components of the lateral collateral ligament complex-ATFL and CFL-and determine its anatomical relationships.

METHODS

An anatomical study was performed in 32 fresh-frozen below-the-knee ankle specimens. A plane-per-plane anatomical dissection was performed. Overdissecting the area just distal to the inferior ATFL fascicle was avoided to not alter the original morphology of the ligaments and the connecting fibers between them. The characteristics of the ATFL and CFL, as well as any connecting fibers between them were recorded. Measures were obtained in plantar and dorsal flexion, and by two different observers.

RESULTS

The ATFL was observed as a two-fascicle ligament in all the specimens. The superior ATFL fascicle was observed intra-articular in the ankle, in contrast to the inferior fascicle. The mean distance measured between superior ATFL fascicle insertions increases in plantar flexion (median 19.2 mm in plantar flexion, and 12.6 mm in dorsal flexion, p < 0.001), while the same measures observed in the inferior ATFL fascicle does not vary (median 10.6 mm in plantar flexion, and 10.6 mm in dorsal flexion, n.s.). The inferior ATFL fascicle was observed with a common fibular origin with the CFL. The CFL distance between insertions does not vary with ankle movement (median 20.1 mm in plantar flexion, and 19.9 mm in dorsal flexion, n.s.). The inferior ATFL fascicle and the CFL were connected by arciform fibers, that were observed as an intrinsic reinforcement of the subtalar joint capsule.

CONCLUSION

The superior fascicle of the ATFL is a distinct anatomical structure, whereas the inferior ATFL fascicle and the CFL share some features being both isometric ligaments, having a common fibular insertion, and being connected by arciform fibers, and forming a functional and anatomical entity, that has been named the lateral fibulotalocalcaneal ligament (LFTCL) complex. The clinical relevance of this study is that the superior fascicle of the ATFL is anatomical and functionally a distinct structure from the inferior ATFL fascicle. The superior ATFL fascicle is an intra-articular ligament, that will most probably not be able to heal after a rupture, and a microinstability of the ankle is developed. However, when the LFTCL complex is injured, classical ankle instability resulted. In addition, because of the presence of LFTCL complex, excellent results are observed when an isolated repair of the ATFL is performed even when an injury of both the ATFL and CFL exists.

The arthroscopic all-inside ankle lateral collateral ligament repair is a safe and reproducible technique

PURPOSE

Neurovascular structures around the ankle are at risk of injury during arthroscopic all-inside lateral collateral ligament repair for the treatment of chronic ankle instability. This study aimed to evaluate the risk of damage to anatomical structures and reproducibility of the technique amongst surgeons with different levels of expertise in the arthroscopic all-inside ligament repair.

METHODS

Twelve fresh-frozen ankle specimens were used for the study. Two foot and ankle surgeons with different level of experience in the technique performed the procedure on 6 specimens each. The repair was performed following a standardized procedure as originally described. Then, an experienced anatomist dissected all the specimens to evaluate the outcome of the ligament repair, any injuries to anatomical structures and the distance between arthroscopic portals and the superficial peroneal nerve (SPN) and sural nerve.

RESULTS

Dissections revealed no injury to the nerves assessed. Mean distance from the anterolateral portal and the SPN was of 4.8 (range 0.0-10.4) mm. The mean distance from the accessory anterolateral portal to the SPN and sural nerve was of 14.2 (range 7.1-32.9) mm and 28.1 (range 2.8-39.6) mm, respectively. The difference between the 2 surgeons' groups was non-statistically significant for any measurement (mm). In all specimens both fascicles of the anterior talofibular ligament were reattached onto its original fibular footprint. The calcaneofibular ligament was not penetrated in any specimen.

CONCLUSIONS

The all-inside arthroscopic lateral collateral ligament repair is a safe and reproducible technique. The clinical relevance of this study is that this technique provides a safe and anatomic reattachment of the anterior talofibular ligament, with minimal risk of injury to surrounding anatomical structures regardless of the level of experience with the technique.

Anatomic lectures on structures at risk prior to cadaveric courses reduce injury to the superficial peroneal nerve, the commonest complication in ankle arthroscopy

PURPOSE

To assess the effectiveness of cadaveric ankle arthroscopy courses in reducing iatrogenic injuries.

METHODS

A total of 60 novice surgeons enrolled in a basic cadaveric ankle arthroscopy course were divided into two groups. Group A (n = 32) was lectured on portal placement and use of the arthroscope, whereas group B (n = 28) was in addition lectured on specific portal-related complications. Following the performance of anterior ankle arthroscopy and hindfoot endoscopy, the specimens were dissected and carefully assessed for detection of any iatrogenic injuries.

RESULTS

The rate of injury to the superficial peroneal nerve (SPN) was reduced from 25 to 3.6%, in group A compared with B (p = 0.033). Injuries to the peroneus tertius or extensor digitorum longus, the flexor hallucis longus and the tibial nerve or the Achilles tendon were also reduced in group B. Overall, the number of uninjured specimens was 50% (n = 30) and higher in group B (57%) than group A (44%). Lesions to the plantaris tendon, the sural nerve or the posterior tibial artery were more common in group B, however, without reaching statistical significance. Overall, 25 (13.9%) anatomic structures were injured in anterior arthroscopy compared to 18 (5%) in hindfoot endoscopy, out of a potential total of 180 and 360, respectively (p = 0.001).

CONCLUSION

Dedicated lectures on portal-related complications have proven useful in reducing the risk of injury to the SPN, the commonest iatrogenic injury encountered in ankle arthroscopy. Hindfoot endoscopy is significantly safer than anterior ankle arthroscopy in terms of injury to anatomical structures.

Arthroscopic ankle lateral ligament repair with biological augmentation gives excellent results in case of chronic ankle instability

PURPOSE

The open "Broström-Gould" procedure has become the gold standard technique for the treatment of chronic ankle instability. Although arthroscopic techniques treating ankle instability have significantly evolved in the last years, no all arthroscopic Broström-Gould has been described. The aim of the study was to describe the all-arthroscopic Broström-Gould technique [anterior talofibular ligament (ATFL) repair with biological augmentation using the inferior extensor retinaculum (IER)], and to evaluate the clinical results in a group of patients.

METHODS

Fifty-five patients with isolated lateral ankle instability were arthroscopically treated. Arthroscopic ATFL repair with biological augmentation was performed through a two-step procedure. First, the ligament is reattached through an arthroscopic procedure. Next, the ligament is augmented with the IER that is endoscopically grasped. Both the ligament repair and its augmentation with IER were performed with the help of an automatic suture passer and two soft anchors. Characteristics of the patients, and pre- and postoperatively AOFAS and Karlsson scores were recorded.

RESULTS

The median preoperative AOFAS score increased from 74 (range 48-84) to 90 (range 63-100). According to the Karlsson score, the median preoperative average increased from 65 (range 42-82) to 95 (range 65-100). No major complications were reported. Only one case (1.8%) required a revision surgery at 23 months of follow-up.

CONCLUSION

The arthroscopic all-inside ATFL repair with biological augmentation using the IER is a reproducible technique. Excellent clinical results were obtained. The technique has the advantage of its minimally invasive approach and the potential to treat concomitant ankle intra-articular pathology.

LEVEL OF EVIDENCE

Retrospective case series, Level IV.

A step-by-step arthroscopic examination of the anterior ankle compartment

PURPOSE

Despite the increased use of ankle dorsiflexion without distraction, no reports have specifically addressed the arthroscopic anatomy of the ankle in this position. The purpose of this study was to describe the normal arthroscopic anatomy of the ankle joint, when using the ankle dorsiflexion and the dynamic distraction technique, and to propose an arthroscopic examination system for the anterior ankle compartment.

METHODS

Ankle arthroscopy was performed in 20 fresh frozen specimens. Arthroscopic examination was performed with the arthroscope introduced through the anteromedial portal. The anterior compartment was examined in ankle dorsiflexion without distraction. The compartment was examined in four steps: (1) lateral area including the lateral gutter; (2) the central area of the anterior tibial rim; (3) the medial area including the medial gutter; (4) the talar neck. Next, distraction was applied to visualise the anterior compartment again and to examine the central and posterior ankle compartments.

RESULTS

Anatomic intra-articular structures were visualised in all specimens. Four intra-articular fat pads, one anteromedial, two syndesmotic and another posteromedial, were constantly observed. A description of the normal arthroscopic anatomy of the ankle using the ankle dorsiflexion and the dynamic distraction technique is detailed for the anterior, central and posterior compartments.

CONCLUSION

The ankle arthroscopic procedure without distraction allows constant visualisation of the ATFL's superior fascicle on the floor of the lateral gutter, the ATiFL's distal fascicle laterally and the most anterior margin of the deltoid ligament in the medial gutter (anterior tibiotalar ligament). However, ankle distraction is required to observe the central and posterior compartments, but it does not provide optimal visualisation of the anterior ankle compartment structures.

LEVEL OF EVIDENCE

V.

The anterior tibiofibular ligament has a constant distal fascicle that contacts the anterolateral part of the talus

PURPOSE

The anterior tibiofibular ligament (ATiFL) and its distal fascicle have been the subject of numerous studies, mainly due to the involvement of this ligament in anterolateral soft-tissue impingement of the ankle. There is currently no firm evidence related to the incidence of the distal fascicle or the frequency with which it is in contact with the talus, or whether this is a constant anatomic finding. In addition, the terminology used to refer to this structure is not accurate and varies widely in previous studies. The purpose of this study was to perform an anatomic study on a large number of specimens to clarify the anatomy of the anterior tibiofibular ligament, and specifically its distal fascicle, and its possible role in anterior ankle impingement syndrome.

METHODS

During a 7-year period (2010-2016), cadaveric ankle specimens dissected at our Anatomy Department were included in this study, accounting for a total of 154 ankles. The incidence of the distal fascicle and its contact with the talus were documented.

RESULTS

One hundred and seventeen ankles were included [78 men, 39 women, with a median age of 79.3 years (range 51-100 years)]. The ATiFL was found to have a distal fascicle in 100% of ankles, contacting the anterolateral part of the talus in all cases. The contact was increased in plantarflexion and reduced in dorsiflexion and finally disappeared completely in maximum dorsiflexion.

CONCLUSIONS

The ATiFL has a constant distal fascicle that is in contact with the talus in the neutral position and in plantar flexion. Contact disappears in maximum dorsiflexion.

Arthroscopic all-inside ATFL and CFL repair is feasible and provides excellent results in patients with chronic ankle instability

PURPOSE

Chronic ankle instability has been described as presenting with complete tears of both the anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) in 20% of cases. Arthroscopic techniques to treat chronic ankle instability are increasingly being reported and in some instances they can be technically demanding. The aim of this study was to describe an arthroscopic all-inside repair of both the ATFL and CFL, and to report the outcomes of a group of patients with chronic ankle instability that underwent the technique.

METHODS

Twenty-four patients [22 male and 2 female, median age 41 (range 22-56) years] with chronic ankle instability and torn ATFL and CFL were treated arthroscopically after failing non-operative management. Median follow-up was 35 (mean 34.7, and range 18-55) months. Through an arthroscopic all-inside technique, and using a suture passer and two knotless anchors, both fascicles of the ATFL and the CFL were repaired.

RESULTS

Arthroscopic examination demonstrated ATFL and CFL injuries in all patients. Subjective improvement in their ankle instability was observed postoperatively. The anterior drawer and the talar tilt tests were negative at follow-up. The median AOFAS score increased from 65 (mean 65, range 52-85) preoperatively to 97 (mean 97, range 85-100) at final follow-up.

CONCLUSION

Chronic ankle instability with concomitant injury of both the ATFL and CFL, can be successfully treated by an arthroscopic all-inside repair. The clinical relevance of the study is the description of the first arthroscopic all-inside ATFL and CFL anatomic repair technique, which offers excellent clinical results and the inherent benefits from minimally invasive surgery.

LEVEL OF EVIDENCE

IV, retrospective case series.

Advances in the Surgical Management of Ankle Fractures

Ankle fractures are one of the most common injuries treated by orthopedic surgeons worldwide. However, operative indications, techniques, and reported outcomes following operative fixation vary widely in the literature. This evidence-based review focuses on recent advances in the operative management of ankle fractures including arthroscopic-assisted surgery, deltoid ligament complex repair, expanded indications for posterior malleolus fixation, fibula intramedullary nailing, and dynamic syndesmosis repair.

LEVEL OF EVIDENCE

Level V, expert opinion.

Arthroscopic Treatment of Ankle Instability: Brostrom

Over the last 10 years, significant advances have been made and successful techniques have now been developed that effectively treat ankle instability via the arthroscope.Currently arthroscopic lateral ligament repair techniques can be grouped into "arthroscopic-assisted techniques," "all-arthroscopic techniques," and "all-inside techniques." Recent studies have proven these arthroscopic techniques to be a simple, safe, and biomechanically equivalent, stable alternative to open Brostrom Gould lateral ligament reconstruction.

Application of 3D-Printed Personalized Guide in Arthroscopic Ankle Arthrodesis

Objective

To accurately drill the Kirschner wire with the help of the 3D-printed personalized guide and to evaluate the feasibility of the 3D technology as well as the outcome of the surgery.

Methods

Patients' DICM data of ankle via CT examinations were introduced into the MIMICS software to design the personalized guides. Two 2mm Kirschner wires were drilled with the help of the guides; the C-arm fluoroscopy was used to confirm the position of the wires before applying the cannulated screws. The patients who underwent ankle arthrodesis were divided into two groups. The experimental group adopted the 3D-printed personalized guides, while the control group received traditional method, i.e., drilling the Kirschner wires according to the surgeon's previous experience. The times of completing drilling the Kirschner wires to correct position were compared between the two groups. Regular follow-ups were conducted to statistically analyze the differences in the ankle fusion time and AOFAS scores between the two groups.

Results

3D-printed personalized guides were successfully prepared. A total of 29 patients were enrolled, 15 in the experimental group and 14 in the control group. It took 2.2 ± 0.8 minutes to drill the Kirschner wires to correct position in the experimental group and 4.5 ± 1.6 minutes in the control group (p=0.001). No obvious complications occurred in the two groups during and after surgery. Postoperative radiographs confirmed bony fusion in all cases. There were no significant differences in the fusion time (p=0.82) and AOFAS scores at 1 year postoperatively between the two groups (p=0.55).

Conclusions

The application of 3D-printed personalized guide in assisting the accurate drilling of Kirschner wire in ankle arthrodesis can shorten the operation time and reduce the intraoperative radiation. This technique does not affect the surgical outcome.

Trial Registration Number

This study is registered on www.clinicaltrials.gov with NCT03626935.