Epidemiology of adult ankle fractures in Sweden between 1987 and 2004: a population-based study of 91,410 Swedish inpatients

Rearfoot and Ankle Dislocations

Subtalar dislocations, ankle dislocations, and total talar dislocations are high-energy injuries. As such, there may be associated osseous or soft tissue injuries that can be diagnosed with advanced imaging such as computed tomography (CT) or MRI. With closed injuries, closed reduction may require sedation or general anesthesia, flexion of the knee to release the tension of the gastrocnemius-soleus complex, distraction is applied, the deformity is accentuated, then the deformity is corrected. Open injuries are usually associated with a higher level of energy and a higher rate of infection. It is important to thoroughly irrigate and debride open dislocations both before and after reduction.

Comparing immediate and delayed weight bearing in patients with ankle open reduction internal fixation-A protocol for feasibility randomised controlled trial

Introduction

Uncertainty regarding the timing of weight bearing following ankle open reduction internal fixation (ORIF) in patients with different ankle fracture patterns remains. Traditional rehabilitation methods, including six weeks of non-weight bearing (NWB), is still a common approach in many hospitals, while some previous evidence has shown immediate weight bearing (IWB) to be beneficial.

Method

32 adult participants with unimalleolar, bimalleolar or trimalleolar ankle fractures and stable fixation following ankle ORIF will be randomly allocated to either Immediate Weight Bearing (IWB) or Delayed Weight Bearing (DWB) groups. Stability of fixation is a subjective assessment made by the operating surgeon at the completion of fixation and is independent of fracture pattern. Participants in the IWB group will be allowed to weight bear as tolerated within 24 h, while participants in the DWB group will remain non-weight bearing for six weeks. Participants' data including Olerud and Molander Ankle Score, Self-Reported Foot and Ankle Score, SF-36 health survey, time to return to work will be collected. X-rays will be assessed by orthopaedic team members for fixation-related complications including reduction loss, malreduction/malunion, implant failure and non-union. Participants data will be collected at six weeks, three and six-months post-surgery. We will determine the feasibility of a full RCT through assessing the recruitment rate, adherence rate, and drop-out rate.

Results

Not applicable.This pilot RCT will endeavour to optimise standard rehabilitation protocols post ankle ORIF.

Patients with more complex ankle fractures are associated with poorer patient-reported outcome: an observational study of 11,733 patients from the Swedish Fracture Register

BACKGROUND AND PURPOSE

Patient-reported outcome measures (PROMs) following ankle fractures, including all fracture types, have not been reported. It is therefore unclear whether fracture morphology correlates with outcome. We aimed to analyze PROMs in patients with an ankle fracture in relation to the Arbeitsgemeinschaft für Osteosynthesefragen/Orthopaedic Trauma Association (AO/OTA) fracture classification using population-based register data from the Swedish Fracture Register (SFR).

METHODS

All patients aged ≥ 18 years with an ankle fracture (AO/OTA 44A1-C3) registered in the SFR between 2012 and 2019 were retrieved from the register. Patients with completed PROM questionnaires (Short Musculoskeletal Function Assessment and EuroQol-Visual Analogue Scale) on both day 0 (pre-trauma) and 1-year post-trauma were included. The difference in PROMs between day 0 and 1 year was calculated for each patient (delta value) and mean delta values were calculated at group level, based on the AO/OTA fracture classification.

RESULTS

11,733 patients with 11,751 fractures with complete PROMs were included. According to the AO/OTA classification, 21% were A fractures, 67% were B fractures and 12% were C fractures. All groups of patients, regardless of fracture class (A1-C3), displayed an impairment in PROMs after 1 year compared with day 0. Type C fractures displayed a larger impairment in PROMs at group level than type B, which in turn had a greater impairment than type A. The same pattern was seen in groups 3, 2, and 1 for A and B fractures.

CONCLUSION

We found that the AO/OTA classification is prognostic, where more complex fractures were associated with poorer PROMs.

Complications following surgical treatment of ankle fractures in the elderly: can they be avoided?

Background Following surgical treatment of ankle fractures, geriatric patients face high complication rates (CR) in literature. Commonly used diagnostic and treatment algorithms fail to consider requirements of ageing patients which increases the risk of postoperative complications. Objective Present study critically evaluated surgical management of ankle fractures in patients over 65 years old, with focus on identifying modifiable risk factors and effective comorbidity management strategies. Methods We conducted a retrospective single-center study on patients who underwent surgical treatment of an ankle fracture. Based on their age, participants were divided into non-geriatric patients (NGP<65y) and geriatric patients (GP≥65y). We analyzed overall CR and number of minor and major complications in relation to timing of surgery, biological sex, injury pattern, osteosynthesis, pre-existing medical conditions, and postoperative care. Results 402 patients were included. GP encountered significantly higher overall (p<0.001), minor (p<0.001) and major (p=0.003) complications. They presented more complex, displaced and open fractures. Predominant factor contributing to higher CR in NGP and markedly in GP was concomitant diseases, presenting a strong OR of 19,290 (p<0.001) and 17,022 (p<0.001). Delaying surgery and managing comorbidities preoperatively had a favorable impact. Conclusion We revealed a high significant correlation between pre-existing medical conditions and postoperative results. To ascertain viability of delayed surgery in facilitating additional diagnostics and treatment of comorbidities, further comparative trials with a larger cohort are imperative.

Postoperative Stability in Displaced Ankle Fractures With Concomitant Ligamentous Injuries

Ankle instability, which can be attributed to either the deltoid or lateral ligamentous complex, may be both a cause and a consequence of ankle fractures. This study aimed to assess postoperative ankle instability in patients with displaced ankle fractures. A total of 54 patients with displaced ankle fractures were included. Malleolar fractures were surgically reduced and fixated, and if necessary, the syndesmosis was stabilized. Concomitant deltoid injuries were left unrepaired. Ankle stress radiographs were taken approximately 25.4 months after surgery, with a standard deviation of 20.5 months. Radiographic measurements included the tibiotalar tilt angle (TT) on varus stress view, anterior translation of the talus (AT) on the anterior drawer view, and the medial clear space (MC) and tibiotalar tilt angle on the valgus stress view. These measurements were compared between the injured and the noninjured contralateral ankle for all patients as well as in a subgroup of 19 patients with concomitant deltoid and syndesmosis injuries. There were no significant differences in Varus TT (p = .675, p = .394), AT (p = .516, p = .967), Valgus MC (p = .190, p = 0.498), and Valgus TT (p = .173, p = .442) between the injured and noninjured ankles in the whole group of patients as well as in the subgroup of patients with concomitant deltoid and syndesmosis injuries. Patients with displaced ankle fractures exhibited radiographically stable ankles postoperatively. Syndesmosis fixation without deltoid ligament repair is a viable treatment option for achieving ankle stability postoperatively in fractures with both ligament injuries.

Preventing Surgical Site Infections in Geriatric Ankle Fracture Surgery with Closed-Incision Vacuum Therapy: A Pilot Study

BACKGROUND

Ankle fractures are among the most common fractures in older adult patients that need surgical treatment. The risk of surgical site infections (SSIs) after ankle fracture surgery ranges between 0.5% and 30%; SSI incidence is higher among older adults. Further, SSIs have significant consequences for subjective functional outcomes and create a need for prolonged intravenous antibiotic therapy and wound care. Accordingly, it is critical to determine risk factors for and establish optimal postoperative wound care to prevent SSIs.

OBJECTIVE

The aim of the pilot study was to examine the feasibility of closed-incision vacuum therapy (CIVT) to reduce rates of SSI in older adults.

METHODS

The authors performed a pilot study of a CIVT system in a population of 10 older adult patients after ankle fracture surgery.

RESULTS

Nine patients experienced uncomplicated wound healing of the lateral incision. One patient (10%) developed an SSI after premature removal of the vacuum system because of technical failure. Six weeks postoperation, overall satisfaction with the CIVT was high; none of the participants complained of incapacitating discomfort or disruptive limitations in postsurgical recovery.

CONCLUSIONS

The authors conclude that CIVT is a feasible, safe, and generally well-tolerated therapy to prevent SSIs in postoperative wound healing after open reduction and internal fixation in older adult patients after ankle fracture.

Comparison of plate versus screw internal fixation in the treatment of posterior malleolar fracture: A systematic review and meta-analysis

BACKGROUND

Treatment of posterior malleolar fracture with plate or screw fixation is still controversial. Plate fixation is considered to have better stability but more soft tissue damage; screw fixation is less invasive and may yields lesser blood loss and surgery time. We conducted this meta-analysis to explore intraoperative and postoperative efficacy between plate and screw fixation in posterior malleolar fractured patients.

METHODS

PubMed, Cochrane, Embase, Scopus and Chinese National Knowledge Infrastructure databases were searched in accordance with the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) guidelines. Random-effects model and 95% confidence intervals was used. The outcomes of interest were surgery time, blood loss, length of hospital stay, American Orthopedic Foot and Ankle Score (AOFAS), bone healing time, full weight bearing time, off bed ambulation time, Visual Analogue Scale (VAS), complication rate, and rate of use of syndesmosis screw etc. RESULTS: One randomized clinical trial and fifty-two retrospective cohort studies with a total of 3757 patients (1956 in screw group and 1801 in plate group) were included in the systematic review. Compared to screw group, plate group yielded significantly longer surgery time, more intraoperative blood loss, but shorter length of hospital stay, better AOFAS, better Baird Jackson score, better AOFAS and Baird Jackson excellent-good rate, shorter bone healing time, shorter time enabling full weight bearing, shorter time enabling off bed ambulation, lesser postoperative pain, lesser complication rate, lesser loosening rate, lesser malunion rate, and lesser postoperative osteoarthritis.

CONCLUSIONS

Plate fixation is a favorable alternative to screw fixation in posterior malleolar fractured patients. Although plate fixation was at risk of longer surgery time and more blood loss, it provided better postoperative functional outcome, shorter healing, weight bearing and off bed ambulation time and lesser pain compared to screw fixation.

Intramedullary Nailing Versus Open Reduction and Plate Fixation for Lateral Malleolar Fractures: A Meta-Analysis

The fixation for lateral malleolar fracture in ankle fractures is still controversial. The purpose of this meta-analysis is to compare clinical and radiological outcomes between intramedullary nail (IMN) and plate for lateral malleolar fractures in ankle fractures. The PubMed, EMBASE, and Cochrane Library were searched for randomized controlled trials (RCTs) from databases inception to June 2023. Data on outcomes were extracted and the methodological quality of the included studies were assessed. A meta-analysis was performed using RevMan 5.3 software when the data extracted from included studies could be synthesized. Seven RCTs were included. The methodological quality of the included studies was moderate to high. The meta-analysis results showed that the infection rate of the IMN group was significantly lower than that of the plate group (RR = 0.38; 95%CI 0.18-0.82; p = .01). There were no significant differences between the 2 groups in Olerud and Molander Ankle Score (OMAS), union rate, radiological outcomes, nerve injury rate, reoperation rate, loss of reduction, and total complication rate. Our present meta-analysis demonstrated that the IMN might be a better method for the fixation of lateral malleolar fracture in ankle fracture, as the infection rate was significantly lower than a plate.

Tibiotalar nailing using an antegrade intramedullary tibial nail: a salvage procedure for unstable distal tibia and ankle fractures in the frail elderly patient

AIM

This article describes the technique of tibiotalar nailing performed using an antegrade tibial nail for salvage of distal tibia and ankle fractures in elderly patients.

MATERIALS AND METHODS

We report indications, surgical technique, and the clinical outcomes and complication rate in our series to date. A retrospective review was performed at our level 1 major trauma centre. Patient demographics, comorbidities, and 12-month post-operative course were collected. Fractures were classified using the OTA/AO and modified Gustilo-Anderson classification. Fifteen patients underwent the procedure. We present data with a minimum 12-month follow-up. The median age of the patients in this cohort was 83 years (range, 51-102). Five patients were diabetic. Six patients (6/15; 40%) presented with an open fracture.

RESULTS

At final follow-up, fourteen patients reported painless walking and had returned to baseline activity.

CONCLUSION

This technique may serve as a salvage procedure, with indications similar to those for tibio-talar-calcaneal arthrodesis. Indications would include non-constructible pilon fractures, comminuted intra-articular fractures in low-demand patients, or patients at high risk of wound complications.

LEVEL OF CLINICAL EVIDENCE

3.

Patient Characteristics and Outcomes of Geriatric Ankle Fractures: Open Fracture Is the Key Risk Factor for Complications and Functional Decline

OBJECTIVES

To determine whether open (O) or closed (C) geriatric ankle fractures had different patient characteristics or outcomes.

METHODS

.

DESIGN

Retrospective cohort study.

SETTING

Urban Level 1 trauma center.

PATIENT SELECTION CRITERIA

Patients, age 60 years and older, who underwent operative fixation of a rotational ankle fracture (OTA/AO 44A-C) between January 2012 and September 2021.

OUTCOME MEASURES AND COMPARISONS

Morbidity, defined as 90-day reoperation, 90-day readmission, or loss of mobility, as well as 1-year mortality compared between patients with closed and open fractures.

RESULTS

The open cohort was older (75 years vs. 68 years; P = 0.003) but had similar Charlson comorbidity indices (4.6 O vs. 4.0 C; P = 0.323) and preinjury rates of independent ambulation (70.4% O vs. 80.9% C; P = 0.363). There were higher rates of 1-year mortality (11% vs. 0%; P < 0.001), deep infection (14.8% vs. 3.9%; P = 0.019), and loss of mobility (64.7% vs. 23.0%; P < 0.001) in the open cohort. Multivariate regression identified open fracture as an independent predictor of 90-day reoperation (OR: 20.6; P = 0.022) and loss of mobility (OR: 5.1; P = 0.011).

CONCLUSIONS

Despite having comorbidities and preinjury function similar to the closed geriatric ankle fracture cohort, open ankle fracture was independently predictive of greater loss of mobility. Nearly two-thirds of geriatric patients with open ankle fractures experienced a decline in functional independence, compared with 1 in 4 of those with closed fractures. Open fracture was associated with higher rates of deep infection, reoperation, and 1-year mortality.

LEVEL OF EVIDENCE

Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Assessing the content validity of the Manchester-Oxford Foot Questionnaire in surgically treated ankle fracture patients: a qualitative study

BACKGROUND

Roughly 10% of fractures in adults are ankle fractures. These injuries are found in both sexes and present with different fracture characteristics. The treatment varies with the patients' biology and fracture type, and the goals are to restore stability, prevent pain and maintain ankle function. Clinicians generally use outcomes like assessment of radiography, pain level, or function. The use of patient-reported outcome measures is increasing, and the Manchester-Oxford Foot Questionnaire (MOXFQ) has been shown to have good measurement properties when validated in patients with foot and ankle disorders. However, the instrument has not been validated for ankle fracture patients. This study aims to assess the content validity of the items in MOXFQ in surgically treated ankle fracture patients.

METHODS

A qualitative deductive design was used to investigate patients' response process of the MOXFQ. Individual interviews were conducted using cognitive interviewing based on the theoretical framework of the 4-step model by Tourangeau. Adult patients that were surgically treated for an ankle fracture between four weeks and 18 months were purposively sampled, and interviews followed a semi-structured interview guide. The predetermined categories were comprehension, retrieval, judgement, and response.

RESULTS

Seventeen respondents (65% females) were interviewed. Respondents' age ranged from 27 to 76 years. Some of the respondents in the early recovery phase were limited by post-operative restrictions and did not find the items in the walking/standing domain relevant. Respondents that were allowed weight-bearing as tolerated (WBAT) were able to recall relevant information for most items. Respondents with time since surgery more than 12 months had less pain and remembered fewer relevant episodes in the recall period. Items in the social interaction domain contained ambiguous questions and were generally considered less important by respondents. The summary index score lacked important concepts in measuring overall quality of life.

CONCLUSIONS

Pain was a central concept in the post-operative recovery of ankle fracture patients. The MOXFQ-subscales for pain and walking/standing had acceptable content validity in patients that were allowed WBAT. The social interaction-subscale and the summary index score had insufficient content validity for this patient population.

Protected immediate weight-bearing is safe after fixation of ankle fractures with syndesmosis injury fixed with position screw. A retrospective case-series study

BACKGROUND

About 10% of ankle fractures are located above the syndesmosis, which causes injury to the ligament structure of the syndesmosis. There is no consensus regarding when to allow weight-bearing on the operated limb of patients who suffered ankle fractures requiring intraoperative fixation.

OBJECTIVE

The aim of this study is the evaluation of radiographic parameters of syndesmosis reduction and fixation in patients with ankle fracture who underwent immediate protected weight-bearing (use of walking-boot and crutches).

PATIENT AND METHODS

Retrospective case series from January 2015 to December 2020. Evaluation of the tibiofibular clear space, tibiofibular overlap, and medial clear space in the preoperative x-ray, immediate postoperative, 3-, 6- and 12-month after syndesmosis fixation and rehabilitation with protected immediate weight-bearing with crutches and walking-boot.

RESULTS

Out of 137 ankle fractures 39 were included. There was no significant difference in the tibiofibular clear space between the immediate x-ray and after 12 months (4.5 mm ± 1.1 vs. 4.6 mm ± 1.8; p > 0.999). Tibiofibular overlap hasn't shown significant difference between immediate and 12-month x-ray (6.2 mm ± 2.6 vs. 6.6 mm ± 2.6; p > 0.999). Medial clear space also has shown no worsening from immediate to 12-month x-ray (3.1 mm ± 0.9 vs. 2.8 mm ± 0.9; p > 0.999). There were no fixation failure nor postoperative infection.

CONCLUSION

Immediate weight-bearing for patients with ankle fractures with syndesmosis injury and treated with intraoperative fixation with positioning screw proved to be safe with good maintenance of the reduction, no failures of the synthesis material observed and no reports of postoperative infection in the period. LEVEL 3 EVIDENCE: therapeutic retrospective case-series.

Treatment strategies for complex ankle fractures-current developments summarized in a narrative review

Background and Objective

Ankle fractures occur frequently in patients throughout all ages. Due to the many pitfalls associated with their treatment, complex ankle and especially tibial pilon fractures remain a challenge for surgeons. As there is still need for improvement in treating complex ankle fractures and treatment options are steadily increasing this review aims to summarize current practice and aims to highlight current developments by reviewing the literature.

Methods

We conducted a thorough search of PubMed database in December 2022 to identify relevant articles on complex ankle and tibial pilon fractures. Articles in English and German were included in this study.

Key Contents and Findings

Complication rates, especially wound infection are still high, emphasizing the need for careful preoperative planning. Soft tissue management is crucial to reduce complication rates and will often dictate the treatment plan utilized. Open reduction and internal fixation (ORIF) remains the treatment of choice. Nevertheless, in select cases alternative methods such as external fixation, tibiotalocalcaneal nailing or conservative treatment need to be considered as well. Furthermore, additional treatment options such as arthroscopically assisted surgery might help to improve functional outcome after complex ankle fractures. The incidence of complex ankle fractures in geriatric patients keeps rising with our aging population. This group of patients demands particular care and further high-quality studies are needed to warrant best results.

Conclusions

However, more randomized controlled trials are need in order to enhance evidence of newly developed treatment options.

Hindfoot nailing for displaced ankle fractures in the elderly: A case-control analysis

INTRODUCTION

Management of fragility ankle fractures in the elderly poses a surgical dilemma. An alternative to open reduction and internal fixation (ORIF) with screw and plate construct in selected elderly patients who may be significantly frail and comorbid is a tibio-talo-calcaneal (TTC) or hindfoot nail. Hindfoot nailing potentially reduces the risk of wound infection and increases likelihood of earlier return to function by allowing earlier weightbearing. The aim of this study was to examine the outcomes and complications of patients who received a hindfoot nail compared to patients who underwent an ORIF.

METHODS

A retrospective review identified patients who underwent hindfoot nailing from Jan 2010 to Dec 2021. Patients aged >65-years who underwent ORIF in the same time period were concurrently identified. The patients in the ORIF group were matched with patients in the hindfoot nail group by age, gender, comorbidity according to their Charlson Comorbidity Index (CCI) and their pre-injury function by Karnofsky Performance Scale (KPS). Clinical Frailty Scale (CFS) was also collected as part of patient demographics. Outcomes examined include mortality, length of stay, operation time, return to previous mobility, wound complications, metalware failure and infections.

RESULTS

Twenty-six patients were identified in the hindfoot nail group and matched to 26 patients who underwent ORIF. Mean age was 84 and 83 years in the nail and ORIF group respectively. Overall, there were 12 and 11 complications from the hindfoot nail and ORIF group respectively with seven and two requiring return to theatre in the nail group and ORIF group (P = 0.07). The hindfoot nail group waited an average of 22 days after the operation for weightbearing compared to 59 days in the ORIF group (P < 0.001). There were no significant differences in length of stay (P = 0.58) and operation time (P = 0.19).

CONCLUSION

Hindfoot nailing was associated with an increased risk of complications and higher risk of return to the operating theatre. Despite the potential attraction of earlier weightbearing, surgeons and patients need to be aware of these potential pitfalls.

Does the type of anesthesia (regional vs. general) represent an independent predictor for in-hospital complications in operatively treated malleolar fractures? A retrospective analysis of 5262 patients

PURPOSE

The impact of the type of anesthesia (regional vs. general anesthesia) on in-hospital complications in ankle fractures has not been thoroughly studied yet. Identifying factors that place patients at risk for complications following ankle fractures may help reduce their occurrence. The primary goal of this study was (1) to describe the cohort of patients and (2) to evaluate independent risk factors for complications during hospitalization.

METHODS

We analyzed patients from 2005 to 2019 with an operatively treated isolated fracture of the medial or lateral malleolus using a prospective national quality measurement database. Patients were selected based on international classifications (ICD) and national procedural codes (CHOP). Uni- and multivariate analysis were applied.

RESULTS

In total, we analyzed 5262 patients who suffered a fracture of the malleolus; 3003 patients (57%) had regional and 2259 (43%) general anesthesia. Patients with regional anesthesia were significantly older (51 vs. 46 years), but healthier (23 vs. 28% comorbidities) than patients who received general anesthesia. The in-hospital complication rate was not significantly lower in regional anesthesia (2.2% vs 3.0%). The type of anesthesia was not an independent predictor for complications while controlling for confounders.

CONCLUSION

Type of anesthesia was not an independent predictor of complications; however, higher ASA class, age over 70 years, fracture of the medial versus lateral malleolus, longer preoperative stay, and duration of surgery were significant predictors of complications. Patient and procedure characteristics, as well as changes in medical care and epidemiological changes along with patient requests, influenced the choice of the type of anesthesia.

Use of Distal Tibial Cortical Bone Thickness and FRAX Score for Further Treatment Planning in Patients with Trimalleolar Ankle Fractures

Trimalleolar ankle fractures show a bimodal age distribution, affecting younger men and older women. Postmenopausal women often exhibit low bone mineral density, which contributes to a higher prevalence of osteoporotic-related fractures. The primary goal of this study was to analyse the association of patient characteristics with the cortical bone thickness of the distal tibia (CBTT) in trimalleolar ankle fractures.

METHODS

A total of 193 patients with a trimalleolar ankle fracture treated between 2011 and 2020 were included. Patient registries were reviewed regarding demographics, mechanism, and type of injury. The CBTT was assessed in radiographs and CT images. The FRAX score was calculated to estimate the probability for an osteoporotic fracture. A multivariable regression model was calculated to identify independent variables affecting the cortical bone thickness of the distal tibia.

RESULTS

Patients older than 55 years were 4.22 (95% CI: 2.12; 8.38) times more likely to be female. In the multivariable regression analysis, female sex (β -0.508, 95% CI: -0.739; -0.278, p < 0.001) and a higher age (β -0.009, 95% CI: -0.149; -0.003, p = 0.002) were independent variables associated with a lower CBTT. Patients with a CBTT < 3.5 mm had a higher 10-year probability for a major osteoporotic fracture (12% vs. 7.75%; p = 0.001).

CONCLUSIONS

The assessment of the peripheral bone quality in routine computed tomography demonstrated that higher age and female sex are significantly associated with reduced cortical bone thickness of the distal tibia. Patients with a lower CBTT showed a higher probability for a subsequent osteoporotic fracture. In female patients with reduced distal tibial bone quality and associated risk factors, an osteoporosis assessment should be evaluated.

Comparison of Complications, Metalwork Removal and Cost Between Locking and Tubular Plates for Lateral Malleolus Fractures Fixation

Introduction Ankle fractures are common injuries in orthopaedic practice. Open reduction with internal fixation is the main line of management of displaced ankle fractures in fit patients. The study aims to analyse the complications, re-operation rate and cost difference between one-third tubular and locking plates which are the most frequently used constructs in lateral malleolus fractures. Materials and methods The total number of presented ankle fractures from April to August during the years 2015, 2017 and 2019 to our Tertiary Hospital in the United Kingdom were screened. Data including operative fixation, plate used, complication rates, the need for revision surgery and metalwork removal were collected from the hospital's electronic Virtual Trauma Board. Patients who had less than one-year follow-up were excluded. Results A total of 174 patients were included which represents more than half of presented ankle fractures (56%) with a decline in the mean age of operated patients from 56.4 in 2015 to 46.2 in 2019. The majority of fixation used tubular plates (n=122) versus (n=52) for locking plates. Locking plate fixation doubled from 10 in 2015 to 23 in 2019. However, they only contributed to 27% of the total operated ankle fractures. Despite the initial higher complications and removal rates of locking plates in 2015 (P<0.042 and P<0.038 respectively), there was no significant difference in overall complications, revision rates, and metalwork removal between locking plates and tubular plates (p=0.084, FEp= 0.158 and p=0.096 respectively). There was an estimated extra cost of £15938.60 for the use of locking plates during the study timeline. Conclusion There was no significant difference in overall complications, revision surgery and metalwork removal between tubular and locking plates in treating lateral malleolus fractures despite the significantly higher cost of locking constructs. Further studies are needed to illustrate the trend and cost-effective analysis of the tubular and locking plates in treating ankle fractures.

Salvage of Chronic Syndesmosis Instability: A Retrospective Review With Mid-Term Follow-Up

Malreduced syndesmotic injuries lead to poor outcomes. No consensus exists regarding preferred surgical treatment. This study aims to assess clinical and radiographic outcomes in patients undergoing distal tibiofibular arthrodesis or stabilization. Retrospective review identified patients undergoing distal tibiofibular arthrodesis or stabilization between 2003 and 2019. Surgical factors, revision surgeries, and American Orthopedic Foot and Ankle Score ankle-hindfoot scores were collected. Radiographs were independently evaluated by 4 surgeons. Seventy patients were included. Mean American Orthopedic Foot and Ankle Score scores (n = 33) improved from 48 ± 16 preoperatively to 85 ± 14 (p < .001) at a median follow-up of 31.1 months. Mean Kellgren scores (n = 47) increased from 2.1 ± 1 to 2.5 ± 1 (p < .001) and the mean medial clear space decreased from 3.2 mm ± 0.8 mm to 2.8 mm ± 0.8 mm (p <.001) with no differences between the arthrodesis and stabilization groups. Zero patients progressed to arthroplasty or fusion. Patients demonstrated significant functional improvement after distal tibiofibular arthrodesis and stabilization. Progression of arthritis, while statistically significant, was not clinically significant.

Age-, sex-, and subregion-specific properties of distal fibular microarchitecture and strength: An ex vivo HR-pQCT study

Despite its clinical relevance in the context of ankle fractures, little is known about the bone microarchitecture and strength of the distal fibula, especially regarding age-, sex-, and subregion-specific effects. To address this gap of knowledge, we obtained fibulae from 30 skeletally intact donors at autopsy (each 15 male and female), which were analyzed by high-resolution peripheral quantitative computed tomography including micro-finite element analysis. Scans were performed in a 7-cm volume of interest and evaluated in three subregions according to the Danis-Weber fracture classification. Group comparisons and linear regression analyses were applied to evaluate the effects of age, sex, and subregion. From distal to proximal, we observed an increase of cortical parameters and a decrease of trabecular parameters. Age was primarily associated with a cortical decrease in all subregions (Danis-Weber type A, B, and C) in women. While women showed a greater magnitude of decline, men also exhibited an age-associated decrease for some parameters, including cortical area and cortical thickness in the type C subregion. Stiffness and failure load were highest in the type C subregion in both women and men. A critical age-related decline in bone strength parameters in the type B subregion was observed in women, providing an explanation for the increased incidence of low-traumatic type B fractures in the elderly. Together, these findings extend the current understanding of distal fibular microarchitecture, likely explaining the epidemiologic features of distal fibula fractures and emphasizing the need for age-adapted treatment algorithms.

Epidemiology of more than 50,000 ankle fractures in the Swedish Fracture Register during a period of 10 years

BACKGROUND

Despite being one of the most common types of fracture, there is a lack of epidemiological studies involving ankle fractures of all kinds. Since 2012, the Swedish Fracture Register (SFR) has prospectively collected data on surgically and non-surgically treated ankle fractures. The aim of this study is to describe the epidemiology of ankle fractures between 2012 and 2022.

METHODS

All ankle fractures registered in the SFR between 1 April 2012 and 31 March 2022 in patients aged 16 years or older were included. Information on age, sex, mechanism of injury, fracture classification according to AO/OTA and high- or low-energy trauma was retrieved from the SFR.

RESULTS

During the study period, 56,439 patients sustained 57,443 ankle fractures. Women (61%) were more commonly affected than men (39%). The mean age at the time of injury was 55 years. Men were found to be younger at the time of injury compared with women. Women were found to sustain open fractures more frequently, whereas the men more frequently sustained high-energy trauma. The most common mechanism of injury for all ankle fractures and for each AO/OTA44 fracture group separately was a simple fall. A seasonal variation in ankle fractures was found, where the number of ankle fractures peaked during the between November and March.

CONCLUSIONS

This study presents the epidemiology of all AO/OTA types of ankle fractures. We have demonstrated that most ankle fractures are caused by a simple fall and occur during wintertime. Women are more commonly affected than men and are older at the time of injury. These findings indicate that age-related skeletal fragility, as well as an increasing risk of simple falls in the elderly, may be risk factors for ankle fractures. This study will contribute to the planning of primary prevention for ankle fractures.

Braces versus casts for post-operational immobilization of ankle fractures: A meta-analysis

Background and aims

Both casts and braces can be used for post-operational immobilization of ankle fractures. This meta-analysis aimed to assess the complications and functional effects of the two types of immobilization.

Material and methods

PubMed, Embase, Cochrane, and CNKI was searched for randomized controlled trials (published between Jan 1, 1950, and March 2022). Relative risk (RR) or standard mean difference (SMD) with a 95% confidence interval (CI) was used to present the outcomes. The pooled data were assessed by using the fixed-effects model or random-effects model.

Results

A total of 5 randomized controlled studies involving 930 subjects were included according to our inclusion criteria. On the ankle score at 6w,12w and 52w, there was no statistically significant difference between the two groups. In terms of 6w, the brace group showed better ankle dorsiflexion (MD = 6.78, 95% CI 0.56-13.00, p = 0.03) and plantar flexion (MD = 6.58, 95% CI 1.60-11.55, p = 0.01) than the cast group. The wound complications (RR = 3.49, 95% CI 1.32 to 9.24, p = 0.01) and total complications (RR = 3.54, 95% CI 1.92 to 6.50, p < 0.0001) in the brace group were three times more than that in the cast group. There was no statistically significant difference between the two groups in the non-wound complications. There was no statistically significant difference between the two groups in the time of going back to work, swelling of the ankle, and atrophy of the calf muscle.

Conclusion

The short-term and long-term functional outcomes after postoperative treatment of adult ankle fractures with braces are similar to those with casts. The usage of braces may cause three times more wound complications than that of casts.

ANALYSIS OF 45,507 SURGICAL TREATMENT OF DISTAL TIBIA AND MALLEOLAR FRACTURES OVER 14 YEARS

The distal leg joint fractures are among the most common fractures in humans across all age groups, and 50% of them require surgical treatment. Few studies discuss the epidemiology and costs of this fracture in the global and national literature.

OBJECTIVE

To evaluate the annual incidence and reimbursement value of distal leg joint fractures requiring surgical treatment from 2008 to 2021.

METHODS

A retrospective study was conducted to analyze the complex structured data of high volume and high variability (Big Data), publicly available on the TabNet platform (DATASUS), via software with artificial intelligence. Data from 2008 to 2021 on surgical treatment for malleolar fracture, distal tibia fracture, and isolated fibula fracture were analyzed.

RESULTS

From 2008 to 2021, there was an average incidence of 28.8 fractures/10⁵ inhabitants per year, representing 14.62% of all fractures. The total amount paid for hospitalizations due to these fractures was R$ 34,218,014.62 over these 14 years.

CONCLUSION

The incidence of distal leg joint fractures follows the pattern of those recorded in other countries. The adjustment of reimbursement over the years was lower than the accumulated inflation. Level of Evidence II, Economic and Decision Analyses - Developing an Economic or Decision Model.

[Postprimary early elective total arthroplasty in severe ankle fractures]

Treatment of the ankle joint with total ankle arthroplasty (TAA) is an established and safe surgical treatment for osteoarthritis of the ankle. Modern implants have low revision rates and are superior to ankle arthrodesis in terms of patient-reported outcomes. The importance of primary TAA treatment of ankle fractures is unclear. There are currently no studies in the literature on this topic. In view of the increasing number of cases of unstable ankle fractures, especially in older patients and with increasing functional demands also in old age, it is important to consider TAA in the management of these fractures in the future. Clinical studies are necessary to evaluate the treatment of ankle fractures using TAA.

Trends of incidence and treatment strategies for operatively treated distal fibula fractures from 2005 to 2019: a nationwide register analysis

INTRODUCTION

Valid epidemiological data about distal fibular fractures and their treatment strategies are missing. Innovative osteosynthesis techniques were introduced and improved during the past 15 years. The aim of this study was to investigate the epidemiologic development and the implementation of new treatment strategies in a nationwide register in Germany over a period of 15 years.

MATERIALS AND METHODS

Data of the German Federal Statistical Office from 2005 until 2019 were screened. Adults with a fracture of the distal fibula were included. Data were separated for gender, age and treatment strategy.

RESULTS

During the past 15 years, there was a steady annual incidence of distal fibula fractures of 74 ± 32 per 100,000 people without any significant changes (p = 0.436). 60.1% ± 0.6% of all fractures occurred in females. The annual incidence for male was nearly constant over the different age groups, whereas for female, there was a clear increase in incidence above the age of 40. Whereas 66% of fractures in between 20 and 30 years of age occurred in male, approximately 70% of fractures above the age of 60 occurred in females. The relative quantity of locking plates increased from 2% in 2005 to 34% in 2019. In 2019, only 1.02% of the patients were operated with an intramedullary nail.

CONCLUSIONS

Operatively treated distal fibular fractures revealed an age dependent increase in incidence in postmenopausal women compared to younger females. Regarding the treatment strategy, there was an increase in application of locking plates. The data implicate a typical fragility fracture related age and gender distribution for distal fibula fractures.

Similar Clinical Outcome in Locking and Conventional Plate Osteosynthesis for the Treatment of AO 44-B2 Ankle Fractures

INTRODUCTION

Biomechanical studies have proved that locking plates have better primary stability besides versatility regarding fracture pattern while reducing bone contact and bridging the gap, whereas conventional nonlocking plates (plus lag screw) depend on bone-plate compression. The clinical benefit of locking plates over nonlocking plates remains unanswered, however. Therefore, this retrospective cohort study was set up to test the hypothesis that the use of locking plates for unstable ankle fractures will result in fewer re-displacements, superior bony healing, and functional and clinical outcomes better than observed in the nonlocking cohort.

METHODS

Bimalleolar ankle fractures (AO 44-B2) without syndesmotic injury treated with either a locking or a nonlocking plate were included. Groups were compared for complications, bone healing, secondary dislocation, progressions of osteoarthritis, and clinical outcome using patient-reported outcome measures.

RESULTS

Data revealed no clinical outcome differences (Olerud-Molander Ankle Score: nonlocking 88.2 ± 14.4, locking 88.8 ± 12.3, P = .69, robust two 1-sided test for equality (RTOST): P = .03; American Orthopaedic Foot and Ankle Score: nonlocking 91.2 ± 12.9, locking 91.8 ± 11.3, P = .96, RTOST: P = .04). Nevertheless, a significant postoperative progression of osteoarthritis was detected in both groups (P = .04). This was independent of implant (P = .16). Although difference was not significant, locking plates were preferred in older (P = .78) and sicker patients (P = .63) and in cases with severer osteoarthritis (P = .16), and were associated with a higher complication rate (P = .42) and secondary dislocation (nonlocking 9.4%, locking 18.2%; P = .42). Re-displacement, however, was not a compelling reason for revision.

CONCLUSIONS

The present study shows statistically significant equality of both types of implants. Contrary to our expectation, locking plates seemed to be associated with a higher risk for re-displacement. Overall, the use of either locking or nonlocking plates for unstable AO 44-B2 fractures is safe and successful despite significant progression of osteoarthritis.

LEVEL OF EVIDENCE

III, Retrospective observational cohort study.

The incidence of musculoskeletal injuries: a systematic review and meta-analysis

Aims

The aim of this systematic review and meta-analysis was to gather epidemiological information on selected musculoskeletal injuries and to provide pooled injury-specific incidence rates.

Methods

PubMed (National Library of Medicine) and Scopus (Elsevier) databases were searched. Articles were eligible for inclusion if they reported incidence rate (or count with population at risk), contained data on adult population, and were written in English language. The number of cases and population at risk were collected, and the pooled incidence rates (per 100,000 person-years) with 95% confidence intervals (CIs) were calculated by using either a fixed or random effects model.

Results

The screening of titles yielded 206 articles eligible for inclusion in the study. Of these, 173 (84%) articles provided sufficient information to be included in the pooled incidence rates. Incidences of fractures were investigated in 154 studies, and the most common fractures in the whole adult population based on the pooled incidence rates were distal radius fractures (212.0, 95% CI 178.1 to 252.4 per 100,000 person-years), finger fractures (117.1, 95% CI 105.3 to 130.2 per 100,000 person-years), and hip fractures (112.9, 95% CI 82.2 to 154.9 per 100,000 person-years). The most common sprains and dislocations were ankle sprains (429.4, 95% CI 243.0 to 759.0 per 100,000 person-years) and first-time patellar dislocations (32.8, 95% CI 21.6 to 49.7 per 100,000 person-years). The most common injuries were anterior cruciate ligament (17.5, 95% CI 6.0 to 50.2 per 100,000 person-years) and Achilles (13.7, 95% CI 9.6 to 19.5 per 100,000 person-years) ruptures.

Conclusion

The presented pooled incidence estimates serve as important references in assessing the global economic and social burden of musculoskeletal injuries. Cite this article: Bone Joint Res 2022;11(11):814–825.

A retrospective assessment of the clinical efficacy of different internal fixation methods in the treatment of distal fibula fractures in the elderly

An ankle fracture is a fracture of the distal tibia or fibula that forms the ankle joint, usually associated with ligament and soft tissue injury, and is a common type of lower limb fracture and one of the most common types of fracture in the elderly. Although ankle fractures are one of the most common injuries seen by orthopedic trauma surgeons, there is no uniform protocol for the diagnosis and treatment of ankle fractures in the elderly, and there are many controversial indications for surgery. The aim of this study is to assess the clinical efficacy of different internal fixation methods in the treatment of distal fibular fractures in the elderly, in an effort to improve the rational selection and application of clinical acts. A retrospective analysis was performed on 68 cases of patients who suffered an ankle fracture and were treated with different internal fixation methods according to the fracture types and individual differences in distal fibula fractures. The postoperative therapeutic effect assessment was performed in terms of clinical examination, imaging evaluation, and AOFAS ankle-hind foot function scoring. There was no unhealed bone, ankle instability and loose/fractured internal fixation. Fracture healing time was 2.7 to 4.0 months (average 3.2 months). AOFAS score was 88.3 ± 6.2, of which, 34 excellent cases, 30 good cases, and 4 fair cases. Ankle activity dorsiflexion 6º~18º, average 15º; plantar flexion 26º~47º, average 37º. A good clinical efficacy could be achieved from the most appropriate individualized internal fixation for distal fibula fractures of elderly patients.

Epidemiology of Ankle Fractures in Korea: A Nationwide Population-Based Study

BACKGROUND

Although ankle fractures are among the most common fractures, nationwide population-based data on the epidemiology of patients with ankle fractures are scarce. This study aimed to perform an epidemiological analysis of all ankle fractures in Korea from 2010 through 2018.

METHODS

We used national registries from the Korean Health Insurance Review and Assessment Service from 2009 to 2018. The annual incidence of the ankle fracture was calculated. The incidence was also calculated according to gender and age. Trends of fracture subtypes were also analyzed. Then, the incidence of ankle fractures by seasonal variation was investigated.

RESULTS

A total of 735,073 ankle fractures were identified in 461,497,758 people for 10 years. The annual incidence of ankle fracture was 171.37/100,000 persons in 2018, with a male to female ratio of 0.78. Interesting differences in the ankle fracture trends were observed between gender. Male shows the highest incidence in adolescence, and the even distribution has lasted for the rest of their lives. In females, the incidence of ankle fracture showed an increasing tendency as their age increased. There was a clear difference in the incidence rate of each season according to age. Ankle fractures occurred more in spring and autumn in children and adolescents and most in winter in the elderly.

CONCLUSION

Ankle fracture risk was different between sex and exhibited seasonal variations. Our findings can be used for epidemiological awareness and prevention campaigns for ankle fractures.

Efficacy of hook-type locking plate and partially threaded cancellous lag screw in the treatment of displaced medial malleolar fractures in elderly patients

INTRODUCTION

Traditionally, partially threaded cancellous lag screws (PTCS) are used for most medial malleolar fractures but are often challenging to execute in elderly patients because of the high risk of postoperative complications. Limited literature explores whether hook-type locking compression plates (LCPs) reliably offer better outcomes than PTCS in elderly patients. We aimed to compare the midterm radiologic and clinical outcomes between hook-type LCP and PTCS for medial malleolar fractures in an elderly population.

METHODS

We included 258 patients, aged 65 years and above, treated with either a hook-type locking plate (hook LCP group: 121 patients) or PTCS (screw group: 137 patients), and with follow-ups of at least 36 months in this retrospective study. Radiographic assessments included the union rate and interval to fracture union. Clinical assessment included the postoperative complications and revision procedures.

RESULTS

Although a significantly higher rate of comminuted fractures was observed in the hook LCP group than in the screw group (p < .001), no significant difference in the union rate was observed between the two groups (hook LCP group: 93.4% vs. screw group: 89.8%, p = .151), and a significantly shorter interval to union was observed in the hook LCP group (10.2 ± 7.0 vs. 12.3 ± 6.7 weeks, p = .015). There was a trend toward a lower rate of complications, including revision procedures, in the hook LCP group than in the screw group (19.9% vs. 28.5%, p = .107 and 6.6% vs. 13.8%, p = .074).

CONCLUSION

Hook-type LCP may be an alternative option for treating medial malleolar fractures with comminution in elderly patients.

Clinical outcomes in the surgical management of ankle fractures: A systematic review and meta-analysis of fibular intramedullary nail fixation vs. open reduction and internal fixation in randomized controlled trials

BACKGROUND

What level I evidence exists to support the use of FNF for surgical management of ankle fractures in high risk patients? The purpose of this study was to compare clinical outcomes following fibular intramedullary nail fixation (FNF) and open reduction and internal fixation (ORIF) of ankle fractures.

METHODS

A systematic review of the current literature was performed according to Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. Certainty of evidence reported according to GRADE (Grading of Recommendations Assessment, Development, and Evaluation). Our primary hypothesis was that patients undergoing FNF procedures to manage an ankle fracture would have significantly higher patient reported outcome scores (PROs) than patients undergoing ORIF. Primary study outcome measures were validated PROs. Secondary outcome measures included complication rate, secondary surgery rate, and bony union.

RESULTS

The primary outcome analysis revealed no evidence of a significant effect difference on Olerud and Molander Ankle Score (OMAS) PRO and no evidence of statistical heterogeneity. Secondary outcome analysis revealed a significant 0.30 (0.12-0.74 95CI) relative risk reduction for complications in FNF (P = 0.008). No evidence of an effect difference for bony union. The GRADE certainty of the evidence was rated as low for bone union. No evidence of reporting bias was appreciated. Sensitivity analyses did not significantly alter effect estimates.

CONCLUSION

This systematic review and meta-analysis restricted to evidence derived from RCTs revealed that the quality of evidence is reasonably strong and likely sufficient to conclude: (1) there is likely no clinically important difference between FNF and ORIF up to 12 months post-operatively, as defined by OMS (moderate certainty); (2) surgeons may reasonably expect reduced complications in 14 out of every 100 patients treated with FNF (moderate certainty); (3) there is likely no difference in bony union (low certainty). Future studies should investigate more patient-centered outcomes and if short-term findings are durable over time if these findings apply to lower risk populations.

LEVEL OF EVIDENCE

Systematic review and meta-analysis of level I evidence.

Surgeon Volume Impacts Outcomes Following Ankle Fracture Repair

Background:

The purpose of this study was to determine the impact of surgeon volume on outcomes following ankle fracture fixation.

Methods:

Over 7 years, 362 patients who met inclusion criteria (>18 years with rotational ankle fractures) were identified and treated by orthopaedic surgeons at several hospitals within an academic medical center and were retrospectively reviewed. Surgeons that completed less than 24 ankle fixations per year (<90th percentile) during the study period were classified as low-volume (LV) and surgeons completing 24 or more ankle fixations per year (>90th percentile) were classified as high-volume (HV). Chart review was conducted to gather data regarding perioperative, radiographic, inpatient, and long-term outcome data (average 12-month follow-up).

Results:

One hundred thirty-four patients (37.0%) were treated by LV surgeons and 228 (63.0%) were treated by HV surgeons. Although both cohorts had a similar breakdown of fracture patterns (P = .638), the LV cohort had a greater incidence of open fractures (P = .024). No differences were found regarding wait time to surgery, surgery duration, and LOS. Radiographically, more patients in the HV cohort achieved anatomic mortise after surgery (96.5% vs 89.6%, P = .008). Patients in the LV cohort took longer to heal radiographically (4.27 ± 2.4 months vs 5.59 ± 2.9 months, P < .001), and also had higher rates of reoperation and hardware removal (P < .05). Lastly, all cost variables were lower for high-volume surgeons (P < .05).

Conclusion:

In this single-center study, we found that patients treated by LV surgeons took 30% longer to heal radiographically and had greater reoperation rates than those treated by HV surgeons. Additionally, patients treated by high-volume surgeons had more anatomic postoperative radiographic ankle mortise reductions and was less cost-effective than when performed by high-volume surgeons.

Level of Evidence:

Level III, retrospective comparative study.

Maisonneuve Fractures of the Ankle: A Critical Analysis Review

»

Maisonneuve fractures (MFs), originally described as subcapital (high) fibular fractures with additional injury to the anterior and interosseous tibiofibular ligaments, display a variable injury pattern, ranging from stable to highly unstable fractures.

»

The high incidence of associated fractures of the posterior malleolus, the medial malleolus, and the anterolateral distal tibia (the "anterior malleolus") as well as the variable position of the fibula in the fibular notch (FN) warrant preoperative examination via computed tomography (CT).

»

The main goal of treatment is anatomic reduction of the distal fibula into the FN, which requires prior reduction of displaced posterior malleolar fractures, if present, to restore the integrity of the FN.

»

Open reduction of the distal fibula into the FN and fixation with 2 transsyndesmotic screws or fixation with a screw(s) and suture-button implant, under direct vision, on the lateral aspect of the ankle joint and anterior tibiofibular alignment are preferred over closed reduction to avoid sagittal or rotational malpositioning, which is associated with an inferior outcome.

»

Intra- or postoperative 3D CT visualization is essential for assessment of the accuracy of the reduction of the distal fibula into the FN.

Ankle fractures in Finland: 118,929 operatively treated between 1987 and 2019

BACKGROUND AND PURPOSE

Ankle fractures are one of the most common fractures requiring operative treatment. They occur most commonly in postmenopausal women and younger men and recent studies suggest that the incidence of ankle fractures is increasing. In this registry study, we analyze inpatient data of operatively treated ankle fractures during a period of 33 years from our comprehensive nationwide register data.

PATIENTS AND METHODS

The data on operatively treated ankle fracture patients between January 1, 1987 and December 31, 2019 was collected from the Finnish National Hospital Discharge Register and analyzed.

RESULTS

118,929 ankle fractures were treated operatively. These included lateral malleolar fractures (33%), bior trimalleolar fractures (51%), medial malleolar fractures (7%), and other fractures (9%). Mean age was 53 (SD 17) years for women and 43 (16) for men. The average annual incidence rate was 69 per 100,000 person-years. Over the past 3 decades incidence has leveled off for women and has started to decline for men. However, the incidence is increasing in the elderly women group (over 70 years of age). In the over 50 age group, comorbidities have increased over the years, being more common in men than in women. The incidence of ankle fractures was higher during the winter months (November-March).

INTERPRETATION

The number of operatively treated ankle fractures has leveled off during the last 33 years. However, nowadays we operate on more difficult fractures in elderly patients with comorbidities.

Long-Term Follow-up of Functional and Radiographic Outcome After Revision Surgery for Fibula Malunion

Background. Ankle fractures are some of the most common injuries seen in the emergency department. Malunited ankle fractures are uncommon. Patients with malunion frequently present with multiple complaints. Radiographs often show abnormalities in anatomical alignment. Aim. To evaluate the anatomical alignment on radiographic imaging in patients with malunited ankle fractures. Secondary aims were to evaluate patient satisfaction after reconstruction and to investigate the relationships between radiological alignment and functional outcome. Methods. All consecutive patients (n = 25) treated for a fibula malunion between January 1, 2002, and September 1, 2017, were included. The primary outcome was anatomical alignment of the ankle mortise. The talocrural angle (TCA), talar tilt (TT), and medial clear space (MCS) were used to investigate to what extent revision surgery had improved alignment. The patient-related outcome measure consisted of the Olerud and Molander Ankle Score (OMAS). To assess quality of life (QoL) the EQ-5D-5L was used. Results. The median TCA was 78.4° before revision and 79.25° after revision; P = .297. The median TT was 2.95° before revision and 0.70° after; P < .001. The MCS before revision was 5.2 mm and 3.17 mm after; P < .000). The OMAS had a median of 67.5 points. Analysis of the QoL questionnaires yielded a score of 0.84 points. Conclusion. Anatomical alignment improves significantly after revision surgery of malunited ankles. Measurements of the TCA appeared less useful in determining the anatomical alignment. In our series, 60% of patients reported good to excellent results. The QoL scores of our patient were comparable to those in the healthy population in the Netherlands.Levels of Evidence: Level IV: Case series.

Comparison of routine computed tomography and plain X-ray imaging for malleolar fractures-How much do we miss?

PURPOSE

Most patients with ankle arthrosis have a history of ankle fracture. Evaluation of malleolar fractures solely on X-ray may be insufficient to identify many pathologies that potentially contribute to ankle arthrosis, with a consequent poor prognosis. We investigated the pathologies that may be overlooked in malleolar fractures evaluated solely on plain X-ray.

METHODS

During 2012-2019, 65,479 patients attended our Emergency Department, of which 6508 complained of an ankle joint problem. X-rays indicated a fracture in 454 of these patients. Patients with isolated, simple fracture of the lateral or medial malleolus, or talus, or a history of surgery to this area were excluded; finally, 67 patients were enrolled (31 males, 36 females; mean age: 51,2 years (range: 9-83 years). Patients underwent X-ray imaging of both ankles in anterio-posterior, lateral, and Mortise views, as well as CT scans. Three independent observers with varied experience in diagnostic imaging (orthopaedic resident, experienced orthopaedic surgeon, and musculoskeletal radiologist) evaluated X-ray images blinded to CT scans. Their diagnoses were subsequently compared with CT findings.

RESULTS

Modeling results indicated that about 40% [95% CI: 32%, 50%] of pathologies may be overlooked based on X-ray evaluation, regardless of evaluator experience. The most frequently overlooked injuries were: Tillaux fracture, Pillon fracture, loose bodies and syndesmosis injury. All of that missed pathologies required dedicated treatment and could be easily missed with standard surgical approach.

CONCLUSION

Evaluation of malleolar fractures by X-ray only inevitably results in overlooking of many pathologies, despite the clinician's experience. Routine CT scan can help to improve the accuracy of diagnosis, and thereby reduce the risk of ankle osteoarthrosis.

An Evaluation of Patient Characteristics Associated With Medical Disposition in the Surgical Treatment of Ankle Fractures

The objective of this investigation was to evaluate patient characteristics associated with medical disposition in treatment of ankle fractures. The 2018 American College of Surgeons National Surgical Quality Improvement Program database was interrogated with data extracted related to the 6 current procedural terminology (CPT) codes available pertaining to ankle fractures: 27766, 27769, 27792, 27814, 27822, and 27823. The primary outcome analysis involved a comparison of patient characteristics and short-term adverse outcomes between those fractures repaired on an inpatient basis versus outpatient basis. A secondary analysis was then performed on patient characteristics and adverse short-term outcomes between those fractures treated on an inpatient basis who were discharged home versus elsewhere. Age (p < .001), race (p < .001), ethnicity (p < .001), body mass index (BMI) (p < .001), estimated probability of mortality (p < .001), estimated probability of morbidity (p < .001), CPT code of fracture designation (p < .001), functional status (p < .001), elective surgery designation (p < .001), American Society of Anesthesiologists class (p < .001), diabetes (p < .001), smoking status (p < .001), dyspnea (p < .001), COPD (p < .001), congestive heart failure (p < .001), hypertension (p < .001), dialysis (p < .001), cancer (p < .001), steroid use (p < .001), blood transfusion history (p < .001), and sepsis/systemic inflammatory response syndrome history (p < .001) were all independently associated with the ankle fracture repair being performed on an inpatient basis on regression analysis. Age (p < .001), race (p = .025), ethnicity (p < .001), BMI (p = .001), CPT code of fracture designation (p < .001), preoperative functional status (p < .001), and American Society of Anesthesiologists class (p < .001) were all independently associated with inpatient ankle fracture repairs being discharged to home following the procedure on regression analysis. The results of this investigation demonstrate that differences in patient demographic characteristics might contribute to medical decision-making as it relates to patient management and discharge disposition in the treatment of ankle fractures.

An overview on the treatment and outcome factors of ankle fractures in elderly men and women aged 80 and over: a systematic review

INTRODUCTION

This article is a systematic review of the literature on elderly aged 80 and over with an ankle fracture. Low energy trauma fractures are a major public health burden in developed countries that have aged populations. Ankle fractures are the third most common fractures after hip and wrist fractures. The purpose of this review is to provide an overview of the treatments and the used outcome factors.

METHODS

PubMed, Embase, Cochrane Library, and CINAHL were searched to retrieve relevant studies. Studies published in English or Dutch concerning the treatment of ankle fractures in patients aged 80 and over were included.

RESULTS

Initially 2054 studies were found in the databases. After removing duplicate entries, 1182 remained. Finally, after screening six studies were included, of which three cohorts studies and three case series. Six different treatments were identified and described; ORIF, transarticular Steinmann pin, plaster cast with or without weight-bearing, Gallagher nail and the TCC nail. Furthermore, 32 outcome factors were identified.

DISCUSSION

The various studies show that practitioners are careful with early weight-bearing. However, if we look closely to the results and other literature, this seems not necessary and it could potentially be of great value to implement early weight-bearing in the treatment. Furthermore, quality of life seems underreported in this research field.

CONCLUSIONS

ORIF with plaster cast and permissive weight-bearing should be considered for this population since it seems to be a safe possibility for a majority of the relatively healthy patients aged 80 and over. In cases where surgery is contra-indicated and a plaster cast is the choice of treatment, early weight-bearing seems to have a positive influence on the outcome in the very old patient.

Ankle Fracture and Length of Stay in US Adult Population Using Data From the National COVID Cohort Collaborative

Background:

The National COVID Cohort Collaborative (N3C) is an innovative approach to integrate real-world clinical observations into a harmonized database during the time of the COVID-19 pandemic when clinical research on ankle fracture surgery is otherwise mostly limited to expert opinion and research letters. The purpose of this manuscript is to introduce the largest cohort of US ankle fracture surgery patients to date with a comparison between lab-confirmed COVID-19–positive and COVID-19–negative.

Methods:

A retrospective cohort of adults with ankle fracture surgery using data from the N3C database with patients undergoing surgery between March 2020 and June 2021. The database is an NIH-funded platform through which the harmonized clinical data from 46 sites is stored. Patient characteristics included body mass index, Charlson Comorbidity Index, and smoking status. Outcomes included 30-day mortality, overall mortality, surgical site infection (SSI), deep SSI, acute kidney injury, pulmonary embolism, deep vein thrombosis, sepsis, time to surgery, and length of stay. COVID-19–positive patients were compared to COVID-19–negative controls to investigate perioperative outcomes during the pandemic.

Results:

A total population of 8.4 million patient records was queried, identifying 4735 adults with ankle fracture surgery. The COVID-19–positive group (n=158, 3.3%) had significantly longer times to surgery (6.5 ± 6.6 vs 5.1 ± 5.5 days, P = .001) and longer lengths of stay (8.3 ± 23.5 vs 4.3 ± 7.4 days, P < .001), compared to the COVID-19–negative group. The COVID-19–positive group also had a higher rate of 30-day mortality.

Conclusion:

Patients with ankle fracture surgery had longer time to surgery and prolonged hospitalizations in COVID-19–positive patients compared to those who tested negative (average delay was about 1 day and increased length of hospitalization was about 4 days). Few perioperative events were observed in either group. Overall, the risks associated with COVID-19 were measurable but not substantial.

Level of Evidence: Level III, retrospective cohort study.

Suture Button versus Screw Fixation for Distal Tibiofibular Injury and Expected Value Decision Analysis

Patient preference for fixation technique of syndesmotic injury in the presence of an ankle fracture is not known. This study followed a five-step process for expected value decision analysis: decision tree, outcome probabilities, expected patient values, foldback analysis, and sensitivity analysis. Outcome variables were "well" (cases that did not require further procedures or suffer any complications related to surgery), surgical site infection (SSI), loss of reduction (LOR), hardware removal (HWR), and malreduction. The systematic review included 22 studies including 358 patients who underwent suture button fixation and 739 who underwent screw fixation. Outcome probabilities for suture button fixation were 76.4% well, 6.2% SSI, 5.4% LOR, 10.4% HWR, and 1.6% malreduction. Outcome probabilities for screw fixation were 47.1% well, 4.3% SSI, 8.1% LOR, 30.7% HWR, and 9.8% malreduction. After the survey and foldback analysis, overall utility values for suture button and screw fixation were 7.46 and 4.78, respectively. One-way sensitivity analysis revealed that the overall utility value for suture button fixation was greater than the utility value of screw fixation under all circumstances except when the rate of malreduction for suture button fixation was theoretically elevated to 85%. Level of evidence: therapeutic, level IV.

Surgical Site Complications in Open Pronation-Abduction Ankle Fracture-Dislocations With Medial Tension Failure Wounds

OBJECTIVES

To examine the incidence of surgical site complications associated with pronation-abduction ankle fracture-dislocations with an open medial tension wound.

DESIGN

Retrospective case series.

SETTING

Accredited Level-1 trauma center.

PATIENTS/PARTICIPANTS

Forty-eight open pronation-abduction ankle fracture-dislocations with medial tension failure wounds treated at our institution from 2014 to 2016.

INTERVENTION

Immediate irrigation and debridement along with surgical stabilization of open ankle fracture-dislocation.

MAIN OUTCOME MEASURES

The primary outcome measure was deep surgical site infection. Secondary outcome measures included other surgical site complications and adverse radiographic events.

RESULTS

A total of 5 patients (10.4%) developed a deep surgical site infection requiring additional surgical debridement. One of the patients with a deep surgical site infection required a below-knee amputation as a result of sepsis. Adverse radiographic outcomes included 3 fibular nonunions (6.3%), 3 implant failures related to syndesmotic fixations (6.3%), one periimplant fracture (2.1%), and postoperative collapse of the tibial plafond in 3 patients (6.3%).

CONCLUSIONS

Open pronation-abduction ankle fracture-dislocations with medial tension failure wounds remain a challenging and potentially devastating injury. Our study suggests that with appropriate surgical debridement, early stabilization, and primary wound closure, acceptable outcomes with a relatively low risk of surgical site complications can be achieved.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

[Analysis of 6851 foot and ankle injuries from 2010-2017 in an emergency department]

Hintergrund

Sprunggelenk- und Fußverletzungen gehören zu den häufigsten Krankheitsbildern in der Traumatologie. Ziel dieser Studie war es, die demografischen Veränderungen von Patienten mit Fuß- und Sprunggelenkverletzungen, das zeitliche Auftreten und die Entwicklung über die Jahre in einer Notaufnahme zu untersuchen.

Material und Methoden

Retrospektive Datenauswertung von Patienten, welche aufgrund einer Fuß- und Sprunggelenkverletzung in der Notaufnahme im Zeitraum von 2010 bis 2017 behandelt wurden. Die Patienten wurden mittels ICD-Codes identifiziert und die demografischen Veränderungen, das zeitliche Auftreten und die Entwicklung über die Jahre analysiert. Mittels Quantil-Quantil-Diagramm wurden kontinuierliche Variablen auf Normalverteilung getestet und, falls zutreffend, mittels t‑Test oder nichtparametrischem Mann-Whitney-U-Test auf Signifikanz überprüft.

Ergebnisse

Insgesamt wurden 6581 Fuß- und Sprunggelenkverletzungen in die Analyse eingeschlossen. Das mittlere Alter von Patienten mit einer Fußfraktur war 39 ± 17,4 Jahre und mit einer Sprunggelenkfraktur 47 ± 19,2 Jahre (p < 0,001). Ligamentäre Verletzungen des Sprunggelenks traten insbesondere bei jüngeren Patienten in den Sommermonaten auf. Die Altersverteilung bei Sprunggelenkfrakturen zeigte für Männer einen Häufigkeitsgipfel zwischen dem 30. und 39. Lebensjahr und bei Frauen ein vermehrtes Auftreten ab dem 50. Lebensjahr. In der Altersgruppe zwischen 65 und 75 Jahren stellten Trimalleolarfrakturen die zweithäufigste Sprunggelenkfraktur dar. Frakturen des Fußes betrafen am häufigsten Patienten im Alter von 20 bis 29 Jahren, wobei bei Frauen ein 2. Häufigkeitsgipfel zwischen dem 50. und 59. Lebensjahr zu beobachten war.

Schlussfolgerung

Ligamentäre Verletzungen des Sprunggelenks sind häufige Krankheitsbilder in der Notaufnahme und betreffen v. a. jüngere Patienten. Sprunggelenkfrakturen zeigten für Frauen eine bimodale Altersverteilung, und insbesondere Bi- und Trimalleolarfrakturen waren vermehrt bei Frauen ab dem 65. Lebensjahr zu beobachten. Aufgrund der erhöhten Prävalenz von Fuß- und Sprunggelenkfrakturen bei älteren Frauen sollte in diesem Patientenkollektiv eine weitere Osteoporoseabklärung veranlasst werden.

Current management of trimalleolar ankle fractures

A trimalleolar ankle fracture is considered unstable and treatment is generally performed operatively. Computed tomography is important for the operative planning by providing an elaborated view of the posterior malleolus.

Trimalleolar ankle fractures have a rising incidence in the last decade with up to 40 per 100,000 people per year. With a growing number of elderly patients, trimalleolar ankle injuries will become more relevant in the form of fragility fractures, posing a particular challenge for trauma surgeons.

In patients with osteoporotic trimalleolar ankle fractures and relevant concomitant conditions, further evidence is awaited to specify indications for open reduction and internal fixation or primary transfixation of the ankle joint.

In younger, more demanding patients, arthroscopic-assisted surgery might improve the outcome, but future research is required to identify patients who will benefit from assisted surgical care.

This review considers current scientific findings regarding all three malleoli to understand the complexity of trimalleolar ankle injuries and provide the reader with an overview of treatment strategies and research, as well as future perspectives.

Cite this article: EFORT Open Rev 2021;6:692-703. DOI: 10.1302/2058-5241.6.200138

Associations of overweight, obesity and osteoporosis with ankle fractures

BACKGROUND

Studies exploring risk factors for ankle fractures in adults are scarce, and with diverging conclusions. This study aims to investigate whether overweight, obesity and osteoporosis may be identified as risk factors for ankle fractures and ankle fracture subgroups according to the Danis-Weber (D-W) classification.

METHODS

108 patients ≥40 years with fracture of the lateral malleolus were included. Controls were 199 persons without a previous fracture history. Bone mineral density of the hips and spine was measured by dual-energy x-ray absorptiometry, and history of previous fracture, comorbidities, medication, physical activity, smoking habits, body mass index and nutritional factors were registered.

RESULTS

Higher body mass index with increments of 5 gave an adjusted odds ratio (OR) of 1.30 (95% confidence interval (CI) 1.03-1.64) for ankle fracture, and an adjusted OR of 1.96 (CI 0.99-4.41) for sustaining a D-W type B or C fracture compared to type A. Compared to patients with normal bone mineral density, the odds of ankle fracture in patients with osteoporosis was 1.53, but the 95% CI was wide (0.79-2.98). Patients with osteoporosis had reduced odds of sustaining a D-W fracture type B or C compared to type A (OR 0.18, CI 0.03-0.83).

CONCLUSIONS

Overweight increased the odds of ankle fractures and the odds of sustaining an ankle fracture with possible syndesmosis disruption and instability (D-W fracture type B or C) compared to the stable and more distal fibula fracture (D-W type A). Osteoporosis did not significantly increase the odds of ankle fractures, thus suffering an ankle fracture does not automatically warrant further osteoporosis assessment.

The Operative Treatment of Ankle Fractures: A 10-Year Retrospective Study of 1529 Patients

Ankle fractures are the second most common fracture of the lower limb and account for nearly 10% of all fractures. They range from simple to complex injuries and approximately 40% require surgical intervention. The aim of our study was to provide an up-to-date reference of the epidemiology, fracture, and fixation characteristics of operatively treated ankle fractures. We also sought to determine the number of patients undergoing further surgery through revision, implant removal, or ankle fusion. A retrospective observational study was conducted of 1529 consecutive patients that underwent operative intervention for an unstable ankle fracture between 2007 and 2017. Fractures of the distal tibia and pilon injuries were excluded. The mean age of patients was 41.8 years with 50.7% male. Unimalleolar fixation was performed in 60.1%, while bimalleolar and trimalleolar fixation was performed in 31.2% and 5%, respectively. Isolated syndesmotic fixation was performed in 3.8%. A posterior malleolus fracture was present in 28.6%, of which 31.6% underwent fixation. A further procedure was performed in 234 (15.3%) patients. Revision open reduction internal fixation was required in 1.4% and 0.8% underwent future ankle fusion. Treatment of ankle fractures makes up a sizeable part of orthopedic trauma practice with more than 1 in 7 patients requiring a second procedure. More complex fractures were predominantly seen in older females, while patients who suffered trimalleolar fractures have an increased likelihood of requiring future ankle fusion or revision. Despite this the rate of ankle fusion was <1%.

Fewer reoperations after posterolateral plate positioning compared with lateral plate positioning in ankle fractures-a retrospective study on 453 AO/OTA 44-B injuries

INTRODUCTION

Ankle fractures are commonly treated by open reduction and internal fixation with plate and screws. Unplanned return to theatre is common, in many cases to extract prominent osteosynthesis material from the lateral malleolus as swelling subsides. We hypothesised that patients operated with a posterolateral plate placement on the lateral malleolus would have fewer reoperations, and fewer complications, compared to patients with a lateral plate placement.

MATERIALS AND METHODS

From a prospectively collected database of all orthopaedic surgery performed at our institution, we identified 664 ankle fractures undergoing plate fixation between 2008-01-01 and 2012-04-30. Radiographs were analysed to only include AO/OTA 44-B-fractures (n = 453), and to define study groups based on plate positioning. Hospital files were assessed to identify possible confounding factors, and any unplanned reoperation or complication. Complications were classified according to Dindo-Clavien.

RESULTS

The risk of reoperation was 13% after posterolateral plating, compared with 24% after lateral plating; absolute risk reduction 10% (95% CI: 2.5-18), p = 0.02. After adjusting for possible confounders, the odds ratio of undergoing reoperation after lateral plating was 2.2 (95% CI: 1.17-4.1), p = 0.01. The two surgical methods did not differ with regard to complication frequency: 31% vs 34%, p = 0.6, but complications following lateral plate fixation were more serious, p = 0.03. Plate positioning depended on surgeon preference.

DISCUSSION

The two studied methods are both considered standard treatment of ankle fractures, and relatively simple surgical procedures. High rates of secondary surgery after plate fixation have been reported, but no study comparing plate positioning has been previously published to our knowledge. AO Sweden has recently switched to teaching posterolateral plating in group exercises during the AO Basic Fracture Surgery course, based on the belief that it may be safer than lateral plating. Our findings support this change in practice.

CONCLUSIONS

Posterolateral plate positioning on the lateral malleolus in AO/OTA 44-B-fractures may be preferential to lateral plate positioning, due to a large difference in unplanned secondary surgery.

Changing epidemiology of lower extremity fractures in adults over a 15-year period - a National Hospital Discharge Registry study

Background

Demographic changes led to an increasingly ageing population in Germany and thus to possible changes in the frequency of fractures. The primary aim of this study was to report changes in fracture rates of the lower extremities in Germany in 2002 compared to 2017 and to evaluate those changes.

Methods

Inpatient data from the German National Hospital Discharge Registry (ICD10) for 2002 and 2017 were evaluated. Changes in total counts and incidence rates were analysed for fractures in the following locations: femoral neck, pertrochanteric, subtrochanteric, distal femur, femoral shaft, proximal and distal tibia, tibial shaft, medial and lateral malleolus, and other parts of the lower leg (including bi- and trimalleolar fractures), calcaneus, talus, other tarsal bones, metatarsal bones, greater toe, lesser toe, other fractures of foot or unspecific fractures of foot and toe. Patients were classed into age groups by sex: 15–24, 25–34,35–44, 45–54, 55–64, 65–74, 75–84, 85–90 and >  90 years.

Results

The total count for lower extremity fractures in men and women increased slightly by 4.5% from 305,764 in 2002 to 319,422 in 2017. Hip and femur fractures increased by 23.5% from 150,565 in 2002 to 185,979 in 2017. The number of these fractures among men increased by 46% and among women by 15.3%. The total count of lower leg fractures decreased by 15.4% from 131,162 in 2002 to 110,924 in 2017. Especially, younger age groups showed a decline for all tibial segments and ankle fractures. For both sexes, the number of lower leg fractures in those 75 years or older increased in all lower leg fracture locations. Most femur and lower leg fractures occurred in women. The incidence of fractures rose sharply from 2002 to 2017, especially for older cohorts.

Conclusion

The total numbers of lower extremity fractures increased slightly in 2017 compared to 2002 – especially hip and femur fractures among men. The incidence of almost all lower extremity fracture types among older people increased during this time. Women were particularly affected. Therefore, focused prevention programmes should be considered including an extended fracture spectrum in the elderly.

Potential Benefits of Limited Clinical and Radiographic Follow-up After Surgical Treatment of Ankle Fractures

Ankle fractures are one of the most prevalent musculoskeletal injuries, with a significant number requiring surgical treatment. Postoperative complications requiring additional interventions frequently occur during the early postoperative period. We hypothesize that there is a limited need for routine clinical and radiographic follow-up once the fracture is deemed healed.

Effects and Anti-rotation Stabilization of the Non-bridging External Fixation for Pronation-Abduction Stage III Ankle Fracture: A Cadaveric Study

Objective

This study is aimed at providing a nonbridging external fixation technique with pinning fixation for the pronation-abduction stage III ankle fracture. The secondary purpose was to evaluate its effect on anatomic reduction and fracture fragment stability against cadaveric models' rotation.

Method

A paired design study was conducted using 14 pairs of the cadaveric model which had been modeled for pronation-abduction stage III ankle fracture. One fracture model from each pair was randomly allocated to receive an open reduction and internal fixation, while the other was reduced and stabilized with the external fixation technique. After the surgery, the antirotational stability tests were performed with external rotation torques of 10 nm, 15 nm, and 20 nm applied, respectively. The postoperation reduction rate and ankle parameters were recorded in anteroposterior and lateral radiographs before and after the antirotational stability experiment.

Result

The outcomes were assessed according to Burwell-Charnley's radiographic criteria of reduction. It showed no statistically significant differences in reduction between the two groups (P < 0.05). The displacement of lateral fragment following a reduction in the external fixation group was significantly larger than that of the internal fixation group (3.14 ± 0.56 vs. 1.49 ± 0.39, P < 0.05). After applying rotational torques of 10 nm, 15 nm, and 20 nm, the results of other parameters showed no significant differences between the two groups.

Conclusion

This nonbridging external fixation method with pin fixation of fracture fragments might have the same effect as that of internal fixation on the reduction rate of pronation-abduction stage III ankle fracture.

Operatively treated ankle fractures in Switzerland, 2002-2012: epidemiology and associations between baseline characteristics and fracture types

BACKGROUND

Ankle fractures are common, and their incidence has been increasing. Previous epidemiological studies have been conducted in the US, Scandinavia, and Scotland. Our objectives were to provide a current epidemiological overview of operatively treated ankle fractures and to evaluate the influence of age, sex, lifestyle factors, and comorbidities on fracture types.

METHODS

We performed a population-based epidemiological study of all ankle fractures treated operatively in a 10- year period from 2002 to 2012.

RESULTS

Two thousand forty-five ankle fractures were operated upon. Men and women differed significantly in age (median 41 vs. 57 years old), obesity (16% vs. 23%), diabetes (5% vs. 10%), smoking (45% vs. 24%), and accident type (daily activities 48% vs. 79%, transportation 24% vs. 9%, sports 21% vs. 8%) respectively. Overall, there were 2% Weber A, 77% Weber B, and 21% Weber C fractures; 54% were uni-, 25% bi-, and 21% trimalleolar; 7.5% of all fractures were open. Weber C fractures were much more frequent among men and with higher BMI (lowest vs. highest category: 14% vs. 32%), but slightly less frequent with older age and among current smokers. Trimalleolar fractures were twice as frequent in women and increased with age.

CONCLUSION

Men and women differed substantially in age, lifestyle factors, comorbidities, accident type, and type of ankle fracture. Male sex and higher BMI were more frequently associated with Weber C fractures, whereas female sex and older age were associated with trimalleolar fracture. The risk for severe fracture increased linearly with the degree of obesity.