The use of cannulated screws for femoral neck fractures is often limited by concerns of avascular necrosis (AVN) occurring, historically seen in 10–20% of fixed intracapsular fractures. The aim of this study was to investigate the rate of AVN with current surgical techniques within our unit. A single centre retrospective review was performed. Operative records between 1st July 2014 and 31st May 2019 were manually searched for patients with an intracapsular neck of femur fracture fixed with cannulated screws, with minimum one year follow up. Patient records and radiographs were reviewed for clinical and radiographic diagnoses of AVN and/or non-union. Fracture pattern and displacement, screw configuration and reduction techniques were recorded, with radiographs independently analysed by five orthopaedic surgeons.Abstract
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Modular dual-mobility (MDM) constructs are used to reduce dislocation rates after total hip replacement (THR). They combine the advantages of dual mobility with the option of supplementary acetabular screw fixation in complex revision surgery. However, there are concerns about adverse reaction to metal debris (ARMD) as a result of fretting corrosion between the metal liner and shell. The aim of this systematic review was to find and review all relevant studies to establish the outcomes and risks associated with MDM hip replacement. All articles on MDM THRs in the Medline, EMBASE, CINAHL, Cochrane Library, and Prospero databases were searched. A total of 14 articles were included. A random intercept logistic regression model was used for meta-analysis, giving estimated mean values.Abstract
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Diabetes has been associated with greater risk of complications and prolonged postoperative recovery following ankle trauma. Our cohort study seeks to review the operative management and outcomes of ankle fractures in diabetic adults relative to non-diabetic adults. Cases were identified using ICD-10 coding criteria. 572 patients from Jan 2016–2019 presented with ankle fractures; 34 in diabetic patients. Mechanism of injury and stability were determined from the index radiograph using a validated Lauge-Hansen classification algorithm. Admission, primary post-operative and discharge radiographs were reviewed independently by two foot and ankle reconstruction specialists to assess adequacy of fixation method. 32% of diabetic patients were managed non-operatively compared to 29% of the matched non-diabetic cohort. The distribution in Lauge-Hansen fracture pattern was comparable between cohorts. Non-diabetic controls were frequency age-matched 2:1.Abstract
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Modular dual-mobility (MDM) constructs are used to reduce dislocation rates after total hip replacement (THR). They combine the advantages of dual mobility with the option of supplementary acetabular screw fixation in complex revision surgery. However, there are concerns about adverse reaction to metal debris (ARMD) as a result of fretting corrosion between the metal liner and shell. Methods: The aim of this systematic review was to find and review all relevant studies to establish the outcomes and risks associated with MDM hip replacement. All articles on MDM THRs in the Medline, EMBASE, CINAHL, Cochrane Library, and Prospero databases were searched. A total of 14 articles were included. A random intercept logistic regression model was used for meta-analysis, giving estimated average values. Results: There were 6 cases of ARMD out of 1312 total. Estimated median incidence of ARMD from meta-analysis was 0.3% (95% CI 0.1 – 1.4%). Mean postoperative serum Cobalt was 0.81 μg/L (95% CI 0.33 – 1.29 μg/L), and Chromium was 0.77 μg/L (95% 0.35 – 1.19 μg/L), from 279 cases in 7 studies. Estimated median incidence of a serum cobalt or chromium ion measurement ≥1 μg/L was 7.9% (95% CI 3.5 – 16.8%), and ≥7 μg/L was 1.8% (95% CI 0.7 – 4.2%). Conclusions: ARMD is a rare but significant complication following total hip replacement using a MDM construct. Its incidence appears higher than that reported in non-metal-on-metal (MoM) hip replacements but lower than that of MoM hip replacements. MDM hip replacements are associated with raised serum metal ion levels postoperatively, but there was no correlation with worse clinical hip function within studies. Studies were poor quality and at high risk of confounding. Pending further work, MDM constructs should be used with caution, reserved for select cases at particularly high risk of dislocation.Objectives
