bluuebunny/crossref_metadata_2025 huggingface dataset:
The Diagnostic Accuracy of MRI to Evaluate Acute Lisfranc Joint Injuries: Comparison With Direct Operative Observations
Authors: Kitsukawa Kaoru , Hirano Takaaki , Niki Hisateru , Tachizawa Natsuki , Mimura Hidefumi
Published: January 2022

Background:

Early diagnosis is important in patients with Lisfranc joint injury to avoid subsequent complications. As the ligaments in the Lisfranc joint are relatively small and course obliquely, isotropic 3-dimensional (3D) magnetic resonance imaging (MRI) can be beneficial to evaluate ligament injury. The purpose of this study was to investigate the diagnostic accuracy of MRI, including isotropic 3D MRI for acute injury of the Lisfranc joint, especially of the interosseous C1-M2 ligament (Lisfranc ligament), the dorsal C1-M2 ligament (dorsal ligament), and the interosseous C1-C2 ligament, compared with direct operative observations.

Methods:

This retrospective review identified 27 patients who had undergone MR examination for acute Lisfranc joint injury followed by surgery. We reviewed the operative reports that described the Lisfranc, dorsal, and interosseous C1-C2 ligaments. All patients underwent an MRI, including a 2D oblique plane image parallel to the Lisfranc ligament and an isotropic 3D MRI. An image analysis of the integrity of the 3 ligaments and other associated injuries was performed. The diagnostic accuracy of MRI was analyzed using operative findings as a reference standard.

Results:

Lisfranc and dorsal ligament injuries were identified on MRI in all patients. MRI depicted disruption of the interosseous C1-C2 ligament in 12 patients. MRI diagnostic accuracy for detection of Lisfranc, dorsal, and interosseous C1-C2 ligaments was 100% (95% CI 0.82-1.0), 74% (95% CI 0.54-0.89), and 70% (95% CI 0.50-0.86), respectively.

Conclusion:

MRI with oblique planes parallel to the Lisfranc ligament and isotropic 3D MRI was reliable for detecting Lisfranc ligament injury, whereas MRI findings of the dorsal and interosseous C1-C2 ligaments were less consistent with operative observations.

Level of Evidence:

Level IV, case series.
Fusion Rate of Subtalar Arthrodesis in Pre-Existing Ankle Arthrodesis: Is There Enough Evidence
Authors: Elhassan Yahya , Jamjoom Ammer , Lomax Adam , Tellisi Nazzar
Published: January 2022

Category:

Hindfoot

Introduction/Purpose:

Isolated subtalar arthrodesis is a commonly performed procedure, which produces high union rates. It was suggested that the fusion rate of subtalar arthrodesis is negatively affected by the presence of pre-existing ipsilateral ankle (tibiotalar) arthrodesis, though the mechanism by which this occurs remains unclear. The aim of this study is to assess the fusion rate of subtalar arthrodesis in the presence of pre-existing ipsilateral ankle arthrodesis and to suggest alternative techniques to improve fusion rate.

Methods:

Electronic patient records and images of all consecutive isolated primary subtalar arthrodesis that were performed in our institution over ten years between (2009-2019) were retrospectively reviewed. Data that was collected included patients’ demographics, body mass index (BMI), smoking status, diabetes, and rheumatoid arthritis, fusion rate; other factors like the method used of the pre-existing ankle arthrodesis were also studied. Subtalar arthrodesis was performed using a lateral approach and compressed by two screws. Two groups were compared, included all isolated primary subtalar arthrodesis with or without previous ipsilateral ankle arthrodesis. Logistic regression was performed to check for the correlation between fusion rate and all factors.

Results:

A total of one hundred and thirty-three (n=133) primary isolated subtalar arthrodesis were identified between (2009- 2019), amongst which twenty-one (n=21) had pre-existing ipsilateral ankle arthrodesis. Ten (n=10) recorded subtalar non-unions occurred in the pre-existing ankle arthrodesis group representing a fusion rate of only 52.4 %, as opposed to sixteen (n=16) in the isolated subtalar fusion without pre-existing ipsilateral ankle arthrodesis group representing a fusion rate of 86.9 %. A significant statistical difference between the two groups, those with ipsilateral ankle arthrodesis had a higher non-rate (P =.001). Age, gender, Body mass index (BMI), smoking status, diabetes, rheumatoid arthritis, and the method used of the pre-existing ankle arthrodesis were found not to have any significant effect on these results.

Conclusion:

Our results show a significantly higher non-union rate of isolated subtalar arthrodesis in the presence of pre-existing ipsilateral ankle arthrodesis. Further research is required to help in clarifying the mechanism by which this effect occurs and to study alternative surgical techniques that might be required.
Mid-Term Prospective Evaluation of Structural Allograft Transplantation for Osteochondral Lesions of the Talar Shoulder
Authors: Fletcher Amanda N. , Adams Samuel B. , Nunley James A. , Easley Mark E.
Published: January 2022

Category:

Ankle

Introduction/Purpose:

The management of large osteochondral lesions of the talar shoulder remains a clinical challenge. Their size, three-dimensional geometry, and subchondral cystic degeneration often preclude treatment with traditional measures such as microfracture and osteochondral autograft transplantation. Structural or bulk osteochondral allograft transplantation has demonstrated efficacy in several retrospective reviews. The purpose of this study was to prospectively evaluate patients who received fresh structural allograft transplantation to the talus.

Methods:

A prospective evaluation of consecutive patients who underwent fresh structural allograft transplantation for an OLT form 2010 to 2019 was performed under Institutional Review Board approval. All patients failed a minimum of 6 months of conservative management. Preoperative MRI and/or CT, as well as plain radiographs were obtained on all patients. The following patient reported outcomes questionnaires were administered preoperatively and yearly after surgery: 100mm VAS pain scale, AOFAS Ankle-Hindfoot Scale, SF-36, and the Short Musculoskeletal Functional Assessment (SMFA). Pre- and postoperative radiographs were assessed for allograft incorporation and the development of arthritis.

Results:

27 patients underwent fresh osteochondral allograft transplantation and were followed for a minimum of 2 years. The mean follow-up was 5 years (range 2-11). The average size of the OLT was 2,269 mm3 (range 813-8,366) based on CT imaging and 5,797 mm3 (range 1,136-12,489) based on MRI imaging. There was significant improvement in the VAS pain score, AOFAS Ankle- Hindfoot Scale score, the SF-36 total score, and the SMFA functional and bother indices (Figure 1). Thirteen (48%) of the patients required subsequent surgery. Twelve underwent removal of hardware and joint debridement and one patient underwent isolated joint debridement. At the time of these surgeries, two grafts demonstrated cartilage delamination. One of these patients had continued pain and progression of arthritis without additional surgery and one was converted to an ankle replacement. Therefore, the failure rate was 7%.

Conclusion:

Significant improvement in pain and function can be achieved with structural allograft transplantation for large OLTs. However, it is important to council patients that painful hardware and stiffness can occur in approximately one-half of patients. An unstable graft and cartilage delamination are indicators of subsequent failure. The use of a structural allograft does not preclude subsequent ankle arthrodesis or arthroplasty.
Short Term Complications Following Total Ankle Arthroplasty and Associated Risk Factors: A NSQIP Database Analysis
Authors: Fletcher Amanda N. , Kwon Nicholas , Danilkowicz Richard , Kim Jaewhan , Grimm Nathan L. , Adams Samuel B.
Published: January 2022

Category:

Ankle; Ankle Arthritis; Diabetes

Introduction/Purpose:

Total ankle arthroplasty (TAA) has become increasingly utilized over the past 20 years to treat osteoarthritis of the ankle. The efficacy and safety of this procedure has been previously reported, but relatively few studies have documented the risk of post-operative complications associated with TAA over the past 10 years. Thus, the aim of this study is to provide a current report on the safety of TAA, particularly in association with a number of preoperative risk factors.

Methods:

A retrospective review of all patients in the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database who underwent TAA between 2012-2018 was performed. A total of 1333 patients were included in this analysis. Penalized logistic regression to consider small numbers of the postoperative complications was used to identify factors associated with incidence of the complications.

Results:

The rate of readmission and superficial wound infection were found to be 1.4% and 0.6%, respectively. Risk factors associated with a prolonged hospital stay were Black race, Hispanic race, and smoking (Fig. 1). Diabetes was associated with a significantly increased risk of readmission. Age, sex, BMI, and steroid use were not associated with increased risk of postoperative complications.

Conclusion:

In this study, the rate of surgical site infection and readmission in TAA was found to be relatively low, compared to published data on TKA and THA. Both race and smoking increase the risk of prolonged hospital stay, while diabetes increases the risk of readmission.
Compression of A Midfoot Osteotomy Using A Circular External Fixator: What is the Ideal Pin Configuration?
Authors: Freeman Tyler R. , Yu Henry , Baldini Todd , Chee Keanu , Koerner Jason L. , Hunt Kenneth J.
Published: January 2022

Category:

Midfoot/Forefoot; Diabetes; Trauma

Introduction/Purpose:

Foot and ankle deformity correction through midfoot osteotomy can be implemented in a wide variety of clinical situations. Use of a circular ring fixator for osteotomy fixation is particularly useful for patients with poor soft tissue envelopes and/or active infection as can occur in diabetes and Charcot arthropathy. The foot pins in a ring fixator can be configured to apply compression at the osteotomy site. However, the optimal pin configuration and force has yet to be determined. The purpose of this study was to quantify compressive forces achieved across midfoot osteotomies with various wire configurations in a circular ring fixator construct.

Methods:

Nine through-knee amputation cadavers were stabilized with a standard circular external fixation carbon frame. A midfoot osteotomy through the transverse tarsal joint was performed using an oscillating saw. A 4mm bone wedge was removed from the osteotomy site for placement of a Tekscan pressure sensor. A two-ring frame was applied in the standard fashion and three parallel 1.8mm smooth wires were placed parallel to each other through the foot distal to the osteotomy: wire #1 proximally through the cuneiforms, wire #2 through the base of the metatarsals, wire #3 through the metatarsal shafts. After baseline pressure readings, wires were sequentially attached (wire #1 alone, wire #1-2, wire #1-3) to the ring fixator and tensioned to 90kg. Pressure readings were recorded at the osteotomy site for each sequential wire tensioning both at the hole location where the wire naturally crossed, 'neutral', and again at one hole 'proximal' (e.g., toward the osteotomy).

Results:

Average compressive load at neutral hole positioning for wire #1 was 382 N. The addition of wire #2 increased the compressive load to 439 N on average. The addition of wire #3 decreased compressive force to 372 N. Similar trends were seen in proximal hole positioning where average compressive force increased following tensioning of wire #2 from 580 N to 600 N but compressive force decreased on wire #3 addition to 425 N. Therefore, tensioning forefoot thin wires in the proximal hole position increases compressive forces by 50% compared to neutral position, and adding a second wire increased compressive force by up to 15% compared to a single forefoot wire.

Conclusion:

In a circular frame midfoot fusion model, the greatest compressive force was achieved with two wires tensioned in the proximal hole position. The addition of a third wire led to force decrease likely due to off-axis forces that may distract the osteotomy site given the difficulty of passing all wires perfectly parallel in all planes. Ideal positioning and tensioning of forefoot pins may optimize construct stability and compression and improve healing of the midfoot osteotomy.
Arthroscopic vs Open Ankle Arthrodesis: A 5-Year Comparison
Authors: Gagné Oliver , Abuhantash Monther , Veljkovic Andrea N. , Wing Kevin J. , Penner Murray J. , Younger Alastair S.
Published: January 2022

Category:

Ankle; Ankle Arthritis; Arthroscopy

Introduction/Purpose:

End-stage ankle arthritis has long been managed surgically with open ankle arthrodesis (OAA). More recently, arthroscopic ankle arthrodesis (AAA) is thought to be associated with improved patient-reported outcome measures (PROMs) and fewer complications. The objective of this study was to systematically compare these two approaches in long-term PROMs, major complication rates and survivorship of the ankle fusion.

Methods:

In this retrospective longitudinal cohort study, all patients with an ankle fusion done at our institution and a minimum two-year follow-up were screened for inclusion. Patients demographics at baseline were collected including: age, gender, BMI, smoking status, diabetes status as well as preoperative ankle arthritis COFAS (Canadian Orthopedic Foot and Ankle Society) type. The following PROMs were completed preoperatively, at 6-months and annually thereafter to five years: AAS, AOS, SF-36, expectation, satisfaction and swelling scores. PROMs were compared at all timepoints using a mixed-effects regression model adjusted for baseline patients' demographics, COFAS type and PROMs. Major postoperative complications and survival analysis/rate of revision of the ankle fusions were also compared.

Results:

Of 874 patients screened for inclusion, 351 ankle fusions done between 2003 and 2019 were eligible for the study, 223 AAA and 128 OAA. The two groups were similar at baseline with respect to demographics, but COFAS type was higher in the OAA group and AAS and AOS scores were better in the AAA group. At one-year post-operatively, there was a higher mean AAS score in the AAA group, but there were no other differences in outcomes at any other timepoint. Survivorship of the ankle fusion in the arthroscopic group was lower (ie higher rate of revision) due to a higher rate of amputation or fusion. Deep infection and wound complications were more common with OAA and accounted for most ankle fusion revisions in this group.

Conclusion:

There were no consistent differences in PROMs of patients who underwent AAA versus OAA patients up to five- years postoperatively. Ankle fusions done arthroscopically had a lower survivorship rate compared to those done with the open approach due to a higher rate of major complications. Previously proposed advantages of AAA over OAA may therefore need to re-assessed and weighed against the technical challenges and associated complications of the arthroscopic technique.
Minimally Invasive Surgery for Severe Hallux Valgus with 2 Year Minimum Follow Up in 106 Feet
Authors: Gordon David , Lewis Thomas L. , Ray Robbie
Published: January 2022

Category:

Bunion; Lesser Toes; Midfoot/Forefoot

Introduction/Purpose:

There is widespread variation in the optimal procedure for correction of severe hallux valgus deformity. Severe hallux valgus (defined as hallux valgus angle (HVA) (>=40°) and/or 1-2 intermetatarsal angle (IMA) (>=20°)) is associated with increased complication rates including recurrence, delayed or non-union and metatarsal shortening with transfer metatarsalgia. There is limited evidence investigating the clinical or radiological outcomes following treatment of severe hallux valgus deformity with third-generation minimally invasive chevron and akin osteotomies (MICA). Objective: The primary aim was to investigate clinical patient reported outcome measures (PROMs) two years following surgery and the radiographic deformity correction for patients undergoing third-generation MICA for severe hallux valgus deformity.

Methods:

Prospective observational single surgeon series of consecutive patients who underwent primary third-generation MICA with screw fixation for severe hallux valgus. The primary outcome was a validated patient reported outcome measure, the Manchester-Oxford Foot Questionnaire (MOXFQ), assessed minimum 2 years following MICA. Secondary outcomes were radiographic deformity correction, complication rates and other quality of life PROMs (EQ-5D and Visual Analogue Pain Scale).

Results:

Between September 2014 and May 2018, 106 consecutive feet (n=78 patients; 73 female, 5 male) met the inclusion criteria. Prospectively collected pre-operative and 2 year PROM MOXFQ data was available for 86 feet (81.1%). At two years following surgery, the MOXFQ score significantly improved for the Pain, Walking and Standing and Social Interaction domains from 39.2 to 7.5, 38.2 to 5.9 and 48.6 to 5.5, respectively (p<0.001). Pre- and post-operative radiographic data was available for all 106 feet. Mean IMA following surgery improved from 18.2° to 6.3° (p<0.001) whilst mean HVA improved from 45.3° to 10.9° (p<0.001).

Conclusion:

This study has demonstrated third-generation MICA for the treatment of severe hallux valgus deformity can achieve significant improvements in clinical PROMs and radiographic deformity correction.
Total Ankle Arthroplasty Outcome in Patients with Inflammatory vs Non-Inflammatory Arthritis: Systematic Review and Meta-Analysis
Authors: Kachooei Amir R. , Mousavian Alireza , Schon Lew C. , Daniel Joseph N. , Pedowitz David I.
Published: January 2022

Category:

Ankle; Ankle Arthritis

Introduction/Purpose:

The decision regarding total ankle replacement is challenging in inflammatory arthritis patients regarding more inferior bone quality, large bone cysts, and increased risk for infections. This systematic review aimed to compare the short and long-term results of total ankle replacement, including the revision rate and the patient-reported outcomes between inflammatory rheumatoid arthritis (RA) versus non-inflammatory ankle osteoarthritis (OA).

Methods:

All published clinical studies on total ankle arthroplasty were searched in the databases. We extracted the data, specifically the American Orthopaedic Foot & Ankle Society (AOFAS) improvement, complication rate, and the reoperation rate. The results were also analyzed based on the prosthesis type.

Results:

In total, 34 trials were included in our study. Out of 5,078 patients, the underlying condition was rheumatoid arthritis in 1,327 patients and was non-inflammatory osteoarthritis in 2,849 patients. There was statistically significant higher AOFAS improvement in the patients with RA vs. OA with a mean follow-up of 63 months (P=0.009). The rates of TAA removal or revision were estimated at 16% (95% CI, 10%-23%) in the OA and 13% (95% CI, 9%-18%) in the RA group. Overlapping confidence intervals showed no significant difference in the rate of failure between RA and OA. The survival rate was 66% in the OA group and 88% in the RA group during a 63-month follow-up.

Conclusion:

Total ankle replacement is a safe procedure in RA patients with fewer minor and major complications relative to other reasons for ankle osteoarthritis.
Comparing Rates of Fusion and Time to Fusion in A Viable Cellular Allograft vs Autograft in Forefoot, Midfoot, and Hindfoot Fusions
Authors: Murphy G. Andrew , Sarfani Shumaila , Richardson David R. , Bettin Clayton C. , Grear Benjamin J.
Published: January 2022

Category:

Other; Ankle Arthritis; Hindfoot; Midfoot/Forefoot

Introduction/Purpose:

Allograft is routinely used to enhance bone healing in foot and ankle surgery. One allograft in particular employs viable cells and bone scaffolding in a gel base. There is little evidence that compares how this material effects rate of fusion (ROF) and time to fusion (TTF) when compared to autograft in routine forefoot, midfoot, and hindfoot fusions. Our study investigates the use of a viable cellular allograft and its effect on these two variables in a population of patients undergoing fusions in the foot and ankle.

Methods:

A retrospective review was conducted over a five-year span of patients undergoing fusions in the foot and ankle where the cellular allograft was used. We compared the ROF and TTF between the following three graft groups: cellular allograft alone, autograft alone, and combined allograft + autograft. Data was retrieved from the patients' electronic medical record and TTF was recorded as the time, in days, it took for a solid radiographic fusion to form. Secondary variables collected included etiology of disease (post-traumatic, inflammatory, or diabetic arthropathy) and also analyzed for effect on ROF and TTF.

Results:

Two hundred and twenty-five patients underwent a fusion in the foot or ankle over a five-year period. Autograft alone was used in 101 patients, the cellular allograft alone was used in 88 patients, and a combination of autograft and the cellular allograft was used in 36 patients. Each group were similar in their comorbid conditions and demographics. The ROF of the autograft only group was 88% (89/101), compared to the cellular allograft group's ROF of 89% (78/88), and the combination graft group's ROF of 75% (27/36). The average TTF between each group varied slightly, with the cellular allograft group fusing the fastest at 86, followed by the autograft alone group at 97 days, and the combined group at 112 days.

Conclusion:

Our study investigated the use of a viable cellular allograft and its effect on ROF and TTF compared to autograft alone and autograft combined with said cellular allograft. We found no significant difference in ROF between autograft alone and the cellular allograft alone but did find a significant difference in ROF for the combined group resulting in lower rate of fusion. Additionally, use of the cellular allograft resulted in fastest time to fusion compared to autograft alone or a combination of the graft types.
Hallux Valgus Multiplanar Correction Surgery Through a Minimally Invasive Technique. Our Initial Experience.
Authors: Pacheco Florencia , Mac-iver Pablo E. Mocoçain , Elgueta Stephane , Díaz Andres Keller , Radkievich Ruben D. , Villagran Diego A. , Salinas David A , Marti Marisol
Published: January 2022

Category:

Bunion; Other

Introduction/Purpose:

Recently, minimally invasive surgery for hallux valgus correction has regained popularity. The minimally invasive Chevron and Akin (MICA), has been proved to be as satisfactory for patients as conventional open techniques. However, due to its design, it is difficult to correct the coronal plane malalignment, which could lead to the recurrence of the deformity. Instead, a Bösch-type osteotomy allows multiplanar correction, and with an upgrade in its fixation we can create a stable third- generation percutaneous osteotomy. We report our early results using the minimally invasive Bösch and Akin osteotomy (MIBA).

Methods:

This was a prospective case series of our first 40 patients (41 feet) undergoing MIBA procedure. Outcome measures included the Manchester-Oxford Foot Questionnaire (MOXFQ), the AOFAS Forefoot Score, and the visual analog scale (VAS) for pain assessment. Radiographic measures included the hallux valgus angle (HVA), intermetatarsal angle (IMA), distal metatarsal articular angle (DMAA) and the pronation of the metatarsal. All complications and emitted radiation dosage were reported as well.

Results:

At 12 months MOXFQ and AOFAS improved from 54.8 to 0.66 (p=0) and 39.1 to 99.2 (p=0), respectively. The mean preoperative VAS was 5.8, and improved during the first week to 1.3 (p<0.05). There was also a significant improvement in all radiographic parameters. We had two significant and five minor complications.

Conclusion:

The MIBA procedure is a safe and effective option to achieve a multiplanar hallux valgus correction.
The Weil Osteotomy for Angular Correction of Axial Plane Deformities of the Lesser MTP Joints: A Radiographic Analysis
Authors: Strickland Carson D. , Cline Joseph T. , Villarreal Eric D. , Murphy G. Andrew
Published: January 2022

Category:

Lesser Toes; Midfoot/Forefoot

Introduction/Purpose:

The oblique shortening (Weil) osteotomy of the distal metatarsal neck has been described as an effective means of correcting lesser toe metatarsophalangeal joint deformity. Previous studies have focused on clinical outcomes, complications, and the magnitude of plantar displacement and shortening. The aim of this study was to quantify the magnitude of axial plane correction obtainable when a medial or lateral displacing Weil osteotomy was used in conjunction with other procedures in forefoot reconstruction surgery.

Methods:

Consecutive patients with a minimum 12-month follow-up who were treated by the senior surgeon from January 1, 2008, to September 1, 2018, were included. Review of the medical records identified 234 toes in 190 patients that had medial or lateral displacement Weil osteotomies as a part of their treatment for metatarsalgia and lesser toe deformity. Concomitant procedures were recorded. Pre- and post-operative weightbearing radiographs were analyzed to determine the amount of transverse plane change and residual varus/valgus alignment. Radiographs were then classified as good (<10 degrees of angulation), intermediate (10-15 degrees), or bad (>15 degrees). Any worsening of the post-operative alignment compared to the pre- operative alignment was noted. Follow-up notes were reviewed for clinical observations of floating toe, resting alignment, persistent pain and swelling at 3 months, complications, and need for revision surgery.

Results:

The average transverse plane correction was 12.5 degrees (range 0-45 degrees). Most toes remained in some degree of radiographic varus or valgus alignment as a true neutral toe was rare. Over a third, (35%, n=81) had increased postoperative angulation; 42% of radiographs were graded as good alignment (n=99), 20% as intermediate (n=46), and 38% as bad (n=90). The most common concomitant procedures were PIP joint resection arthroplasty and distal chevron bunionectomy. Review of clinic notes revealed low incidences of floating toe (7%, n=16), clinical malalignment (8%, n=18), and need for revision surgery (3%, n=8). Persistent swelling was the most common complication, present in 44% of patients at the 3-month follow-up.

Conclusion:

The medial and lateral displacing Weil osteotomy can be a powerful tool to correct lesser toe MTP joint transverse plane deviation. It was typically used with PIP joint resection and hallux valgus procedures to improve the lesser toes and overall forefoot alignment. Interestingly, most toes had a neutral or good clinical alignment regardless of the radiographic alignment. Further studies to correlate radiographic and clinical outcome measures may help define its role in correcting lesser toe deformity.
Autologous Matrix-Induced Chondrogenesis (AMIC) with Lateral Ligament Stabilization for Osteochondral Lesions of the Talus in Patients with Ankle Instability
Authors: Viehöfer Arnd F. , Ackermann Jakob , Wirth Stephan H. , Casari Fabio A. , Weigelt Lizzy , Germann Christoph
Published: January 2022

Category:

Ankle; Hindfoot; Sports

Introduction/Purpose:

Autologous matrix-induced chondrogenesis (AMIC) has shown to result in favorable clinical outcome in patients with osteochondral lesions of the talus (OLT). Yet, the influence of ankle instability on cartilage repair of the ankle has still to be determined. This study sought to compare the clinical and radiographic outcome in patients with and without concomitant lateral ligament stabilization (LLS) undergoing AMIC for the treatment of OLT.

Methods:

This study evaluated AMIC that were implanted in patients for the treatment of symptomatic OLT with and without concomitant ankle instability. Postoperative MRI, Tegner, AOFAS and Cumberland Ankle Instability Tool (CAIT) were obtained at a minimum follow-up of 2 years. A musculoskeletal radiologist scored all grafts according to the MOCART 1 and 2.0 scores. Patients were stratified into two groups based on whether they underwent concomitant LLS for ankle instability. Patients without LLS served as controls. Patients were matched 1:1 for BMI, lesion size, follow-up and age.

Results:

Twenty-six patients that underwent AMIC with a mean follow-up of 4.2 +- 1.5 years were enrolled in this study (13 with and 13 without concomitant ankle instability). Patients' mean age was 33.4 +- 12.7 years with a BMI averaging 26.2 +- 3.7. Patients with concomitant LLS showed worse clinical outcome measured by AOFAS (85.1 +- 14.4 vs. 96.3 +- 5.8, p=0.034) and Tegner (3.8 +- 1.1 vs. 4.4 +- 2.3, p=0.012). No difference was seen between both groups regarding MOCART 1 and 2.0 scores (p=0.714 and p=0.371, respectively). Additionally, postoperative CAIT and AOFAS significantly correlated in patients that underwent concomitant LLS (r=0.766, p=0.002) with a CAIT score of > 24 (stable ankle joint) resulting in AOFAS scores comparable to scores in patients with isolated AMIC (90.1 +- 11.6 vs. 95.3 +- 6.6; p=0.442).

Conclusion:

The results of this study suggest a negative influence of ankle instability on the clinical outcome of cartilage repair with AMIC for the treatment of OLT. If postoperative ankle stability is achieved in patients with LLS, however, comparable outcome as seen after isolated AMIC can be expected.
Evaluation of Lisfranc Injuries: How Involved is the First Tarsometatarsal Joint?
Authors: Wong Liam H. , Chrea Bopha , Atwater Lara C. , Meeker James E.
Published: January 2022

Category:

Midfoot/Forefoot; Trauma

Introduction/Purpose:

Lisfranc injuries are among the most debilitating injuries to the midfoot. Various classification systems have characterized the injury patterns with specific focus on the interval between the base of the second metatarsal and the medial cuneiform as well as the importance of the ligamentous structures of the midfoot. The medial ligamentous restraints of the first tarsometatarsal (TMT) joint and the bony involvement of these injuries remains unclear. Improved knowledge on how the first TMT joint is affected in Lisfranc injuries will provide information on how best to manage these injuries.

Methods:

We conducted a single institution review of all Lisfranc fractures from 2010 through 2020. Patients were identified by CPT codes. Hardcastle and Myerson Lisfranc injury classifications and computed tomography and radiograph characterizations of the first TMT joint were identified by three foot and ankle trained orthopaedic surgeons. Light's kappa statistics (mean weighted Cohen's kappa) evaluated inter-rater reliability of Lisfranc classifications. The effects injury mechanism and Lisfranc classification on the first TMT joint were further assessed using t-test, Mann-Whitney U, Fisher's exact test, and analysis of variance.

Results:

Of 71 patients with a Lisfranc injury, 62 (87%) had a sign of injury to the first TMT joint, which significantly varied by Lisfranc classification (P<0.001; Table). Light's kappa coefficient for inter-rater reliability was 0.46. A fragment of the first TMT articular surface was present in 39 patients (55%; median size=10mm) and a medial capsular avulsion fragment was seen in 28 patients (39%). A fracture was present in the medial cuneiform in 25 patients (35%) and in the first metatarsal in 18 patients (25%). Forty-nine patients (69%) had medial/lateral TMT joint incongruence (median overhang=4mm); 21 (30%) had dorsal/plantar incongruence (median overhang=6mm), which significantly differed by Lisfranc classification (P<0.02) and gender (Female=3.5mm; Male=7mm; P<0.03). Angulation of articular surfaces in the first TMT joint over 5 degrees on the transverse/antero-posterior plane occurred in 32 patients (45%) and in 12 patients (17%) on the sagittal/lateral plane, which significantly differed between Lisfranc classifications (P<0.03).

Conclusion:

Lisfranc injuries have great potential for long-term disability requiring careful screening and diagnosis. The overwhelming majority of Lisfranc injuries include damage to the first tarsometatarsal joint. This is the first study to our knowledge that characterizes this in detail. This study found that the most common patterns involving the first TMT joint included joint incongruity, capsular avulsion and articular surface fracture. A better understanding of injuries to the first TMT can help orthopaedic surgeons with diagnosis and management.
The Use of Deep Machine Learning in Detecting Subtle Lisfranc Joint Instability on Weightbearing Radiographs and Non-Weightbearing CT Scans
Authors: Ashkani-Esfahani Soheil , Mojahed-Yazdi Reza , Bhimani Rohan , Kerkhoffs Gino , Waryasz Gregory R. , DiGiovanni Christopher W. , Lubberts Bart , Guss Daniel
Published: January 2022

Category:

Midfoot/Forefoot; Trauma

Introduction/Purpose:

Diagnosis of subtle Lisfranc joint instability, as a commonly missed foot injury, has remained a concern since it can result in future disabilities if inadequately treated. Weightbearing radiographs (WBR) and conventional CT scans are the most frequent methods in healthcare centers all around the world that are used to assess tarsometatarsal injuries, specifically the Lisfranc joint. However, their accuracy in detecting subtle cases varies depending on the experience and expertise of the interpreter as well as the quality of the images. We aimed to evaluate the use of deep learning and deep convolutional neural network (DCNN) in the detection of subtle Lisfranc instability using WBR and CT scans. Our hypothesis was that this method can increase the accuracy and hasten the interpretation using these modalities.

Methods:

We gathered 200 WBR and 200 CT scans of cases with subtle Lisfranc instability who were diagnosed intraoperatively; 200 WBR and 200 CT scans of patients with otherwise healthy feet were added as the control group. To increase the confidence in the results we implemented saliency maps to visualize the location of the injury as a heat map and exhibit the process of decision-making by the algorithm. The data of the study was expressed as sensitivity, specificity, accuracy, and the area under the curve (AUC). We used Inception DCNN model as the pre-trained DCNN model in this study.

Results:

The performance of the DCNN using WBR resulted in sensitivity=93.6%, specificity=91.1%, Accuracy= 94.7, AUC=98.2%. DCNN applied on CT scan resulted in sensitivity=95.8%, specificity=96.9%, accuracy= 93.2, and AUC=98.4%. In cases that the injury was detected correctly by the DCNN, the saliency map had shown the location of the injury correctly as well (100%, Figure 1 ).

Conclusion:

Here we showed that using DCNN on the currently used interpretation method can significantly improve the accuracy of interpretation using WBR and CT scans in the detection of subtle Lisfranc instability. WBR has lower costs and a lower rate of radiation, thus, improving its performance using deep learning methods can lead to a significant improvement in healthcare quality for the patient and reduced costs for the system.
Analysis of Complications Following Distal Ankle Nerve Blocks for Foot and Ankle Procedures
Authors: Bartholomew Ania , Slone Tyler , Ciesa Michael , Cheney Nicholas A. , Clark Brian C.
Published: January 2022

Category:

Ankle; Arthroscopy; Bunion; Hindfoot; Midfoot/Forefoot; Other

Introduction/Purpose:

Popliteal nerve blocks are a common procedure employed by anesthesiologists to augment intraoperative anesthesia and provide postoperative pain control. Unfortunately, these can be associated with unintended complications including pain, numbness, and foot drop, sometimes without clear resolution. Studies from Kahn (2017), Anderson (2015), Park (2018), Lauf (2020) suggest complications higher than previously reported with Lauf (2020) finding short-term complication rates of 10.1% and 4.1% long-term as confirmed by EMG. Our study looked to address the complication rates from an alternative anesthetic procedure, a distal ankle nerve block involving anesthesia to the five nerve(s) more intimately involved in the surgical procedure. This alternative technique may provide equivalent anesthetic properties and pain relief as popliteal blocks, with fewer complications for many patients across various demographics.

Methods:

We retrospectively reviewed patient charts and messaging from 2019 to 2021 that received a distal ankle field block for various surgical procedures including ankle arthroscopy, ankle fractures, and lateral ankle stabilizations. The five nerves anesthetized in the distal ankle nerve block included the tibial, superficial and deep peroneal, sural, and saphenous. Thus far, 61 surgeries have been reviewed and analyzed for neuropathic complications and confirmed via EMG.

Results:

Of the 61 patients analyzed, 3 patients were found to have a superficial peroneal neuropathy that included dorsal numbness as a result of the distal ankle block, resulting in a 4.92% complication rate. 1 patient required a rescue block to be performed postoperatively for pain. The remaining 57 patients recovered appropriately and without complications. No motor complications have been found from patients receiving distal ankle nerve blocks, as performed by the senior author.

Conclusion:

With the absence of motor complications and markedly reduced incidence of sensory complications, distal ankle nerve blocks may be a beneficial alternative to popliteal nerve blocks for various foot and ankle orthopedic surgeries. As motor complications can result in life-altering disability, an anesthetic procedure with reduced negative motor outcomes can improve surgery and recovery prognosis. Future directions for this study include adding more patients to increase the sample size, as well as continuing to follow current patients, monitoring symptoms or complications.
Percutaneous Modified Lapidus Procedure with Early Weightbearing: Technique and Early Outcomes of the First 30 Cases
Authors: Bean Bryan , Mangold Devin R. , Abousayed Mostafa , Coleman Michelle M. , Thompson John , Guyton Gregory P.
Published: January 2022

Category:

Bunion; Midfoot/Forefoot

Introduction/Purpose:

Minimally invasive techniques (MIS) have focused on first metatarsal osteotomies in hallux valgus correction. Concurrently, new fixation methods allow early weightbearing protocols with the open Lapidus procedure, with nonunion rates comparable to those of more traditional protocols requiring nonweightbearing. We aimed to assess clinical and radiographic results of an MIS-modified Lapidus technique with axial nail fixation (Phantom Lapidus Intramedullary Nail: Paragon28, Englewood, CO USA) and early weightbearing.

Methods:

After institutional review board approval, the first 30 consecutive percutaneous MIS-modified Lapidus procedures by a single surgeon were retrospectively reviewed. Indications for surgery included moderate to severe hallux valgus deformity with or without first tarsometatarsal joint (TMT) instability, first TMT arthritis, adolescent bunion, and failed prior surgery. All patients initiated weightbearing within 12 days and returned to regular footwear by 6 weeks postoperatively. Patients had a minimum follow-up period of 3 months (average 8.3 months). The pre- and postoperative visual analog scale (VAS) pain scores, intra- and postoperative complications, and need for revision surgery were recorded. Pre- and postoperative radiographs were used to evaluate the hallux valgus angle (HVA), 1-2 intermetatarsal angle (IMA), and sesamoid station. Postoperative radiographs were evaluated for signs of hardware loosening and union of the first TMT arthrodesis site. A postoperative CT scan was obtained if nonunion was suspected.

Results:

Thirty consecutive percutaneous modified Lapidus procedures were performed in 28 patients. VAS scores improved from 4.1 preoperatively to 1.8 at final follow-up. The IMA decreased 8.3 degrees to an average of 5.9 degrees. The HVA decreased 19.2 degrees to 11.7 degrees. The medial column was shortened by 0.6%. There were no intraoperative complications. There were two reoperations, including one nonunion requiring revision first TMT fusion with autograft and one hallux valgus recurrence requiring a distal chevron osteotomy. There were no wound complications, surgical site infections, hardware complications, postoperative transfer metatarsalgia, or nerve-related problems.

Conclusion:

The current study provides clinical evidence that the intramedullary nail is a biomechanically stable construct evidenced by the high union rate, lack of hardware failure, and tolerance for early weightbearing. This percutaneous modified Lapidus technique may allow for a low rate of wound complications, accelerated rehabilitaion, and improved cosmesis.
Static vs Dynamic Fixation of Distal Tibiofibular Syndesmosis: A Review of Overlapping Meta-Analyses
Authors: Bernasconi Alessio , Marasco Domenico , Russo Jacopo , Izzo Antonio , Vallefuoco Salvatore , Coppola Francesco , Balato Giovanni , Smeraglia Francesco , Lintz Francois , Patel Shelain
Published: January 2022

Category:

Ankle; Sports

Introduction/Purpose:

Multiple Level I meta-analyses have been led comparing traditional static vs. more recently-introduced dynamic strategies of fixation for injuries of the distal tibiofibular syndesmosis (TFS). The aim of this review was to assess their robustness and methodological quality, providing support in the choice of a treatment strategy in case of TFS injury using the highest level of evidence.

Methods:

In this systematic review, conducted in accordance with the PRISMA guidelines, we identified meta-analyses/systematic reviews comparing static and dynamic fixation methods after acute TFS injury. Robustness of studies was evaluated using the Fragility Index (FI) for meta-analysis and the Fragility Quotient (FQ). The risk of bias was evaluated using the Assessment of Multiple Systematic Reviews(AMSTAR) instrument. Finally, the Jadad Decision Algorithm was applied to select the study which provided the highest quality of evidence to develop recommendations for the fixation strategy of these lesions.

Results:

Out of 1302 records, 4 Level I meta-analyses were included in this study. Analyzing the statistically significant dichotomous outcomes, the median FI was 3.5 (IQR, 2 to 5.5; range, 1 to 9) while the median FQ was 1.9% (IQR, 1 to 3.5; range 0.35 to 4.4). In total, 37% had a FI of 2 or less and 75% of outcomes had a FI of 4 or less. According to the AMSTAR score and Jadad algorithm, the largest meta-analysis was selected as the highest evidence provided so far.

Conclusion:

We selected the meta-analysis by Grassi et al. as the highest quality provided so far, which found that dynamic fixation reduced complication rates and improved clinical outcomes compared to static methods of fixation. We demonstrated that meta-analyses with statistically significant dichotomous outcomes comparing dynamic and static fixation for treating injuries of the distal tibiofibular syndesmosis are fragile, with a change in less than 4 patients or less than 2% of the study population sufficient to reverse a significant outcome to nonsignificant. Based on these findings, we recommend caution when interpreting the results of these studies.
The Lateral Hook Test: What is the Amount of Force that Should Be Applied to Evaluate Syndesmotic Instability Using Arthroscopy?
Authors: Bhimani Rohan , Lubberts Bart , Hagemeijer Noortje , Zhao John Z. , Saengsin Jirawat , Sato Go , Waryasz Gregory R. , DiGiovanni Christopher W. , Guss Daniel
Published: January 2022

Category:

Ankle; Arthroscopy; Basic Sciences/Biologics

Introduction/Purpose:

The lateral hook test is considered the gold standard for the diagnosis of coronal plane syndesmotic instability during arthroscopy. The amount of distal tibiofibular space is directly related to the amount of lateral directed applied force. This study aims to determine the optimal amount of forced needed during a lateral hook test to evaluate syndesmotic instability in the coronal plane. The secondary aim was to determine the amount of displacement variation that occurs when the lateral force is angled anteriorly or posteriorly.

Methods:

Ten fresh-frozen above-knee amputated cadaveric specimens underwent arthroscopic evaluation of the distal tibiofibular joint. The assessment was done first with all syndesmotic and ankle ligaments intact and subsequently with transection of the anterior inferior tibiofibular ligament (AITFL) and the interosseous ligament (IOL). In all scenarios, a lateral hook test was performed under increasing force from 0N to 120N of direct force, with increments of 20N. The lateral hook test was performed in: 1) the neutral position (no angulation), 2) anterior inclination of 15 degrees, and 3) posterior inclination of 15 degrees under the aforementioned force. Anterior and posterior coronal plane distal tibiofibular space were arthroscopically measured. Descriptive statistics were employed to determine the force and the most sensitive method to pull during arthroscopic evaluation to detect syndesmotic instability.

Results:

Among the specimens, after transection of AITFL and IOL, the anterior and posterior coronal plane space increased with increment in force until 60N and then displayed no change in these measurements despite the increase in force. In the intact state, there was an increase in syndesmosis coronal space with increase in force. Of the three methods of force application, the posteriorly directed force has the largest absolute value for the anterior and posterior coronal space, suggesting it is the most sensitive in distinguishing between stable and unstable syndesmotic injury.

Conclusion:

Arthroscopic coronal plane evaluation under 60N of direct force is best suited to distinguish stable from an unstable syndesmosis. Syndesmosis anterior and posterior coronal plane space measurement demonstrate the largest absolute difference when subjected to posteriorly directed force, suggesting that this new method of assessment has the highest potential for diagnosing even subtle syndesmotic instability, along with a lower propensity for error.