Publications by authors named "Dawson Muir"

Aim: To investigate the incidence of symptomatic venous thromboembolism (VTE) after orthopaedic surgery.

Method: We performed a retrospective cohort study investigating the incidence of symptomatic VTE within 90 days of orthopaedic surgery in the Bay of Plenty District Health Board (DHB). Risk factors and antithrombotic regimens were also reviewed.

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National joint registries (NJRs) have been established in Northern Europe for over 20 years. Since then, many other countries have begun collecting and reporting national data for total ankle arthroplasty (TAA). With relatively small numbers implanted, a large variety of available designs, and with any long-term reports dominated by designer groups, TAA is ideally placed to benefit from large national or even pooled national registries.

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Objectives: Does restoration of articular congruity have any effect on long-term outcome following tibial plateau fracture?

Design: Cohort study.

Setting: A secondary hospital in New Zealand, which services a population of 150,000.

Patients: All patients with a depressed tibial plateau fracture seen over a 6 year period were invited to participate in the study.

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Introduction: All-polyethylene (AP) tibial components of total knee replacement (TKR) are substantially cheaper than their modular counterparts. It is well established that their survivorship and radiographic outcomes are comparable. In this study, patient-derived outcome measures were used to compare these two implant types.

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Background: While recent studies have shown patients with developmental dysplasia of the hip (DDH) undergoing total hip arthroplasty (THA) to achieve comparable post-operative outcomes to patients with primary osteoarthritis (OA), it is unclear whether DDH patients display better or worse preoperative function than the general THA population. We aimed to compare the preoperative function and functional response to THA of DDH patients with OA patients.

Methods: Through a retrospective review of prospectively collected regional joint registry data, we compared the preoperative, 1-year post-operative and post-operative change in disease-specific (Oxford hip score (OHS), Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC)) and general health (short form 12 physical health (SF-12 PH), mental health (SF-12 MH) scores) functional scores of 33 DDH patients and 968 OA patients undergoing primary THA.

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Background: Recently, osteochondral grafting has become a popular procedure for treating challenging talar dome lesions. However, no guidelines exist for selection of the surgical approach to obtain perpendicular access to the talar dome.

Hypothesis: The majority of the talar dome can be accessed for perpendicular resurfacing procedures without need for osteotomy.

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The authors studied the outcome of a consecutive series of nine tibiotalocalcaneal fusions for severe calcaneovalgus deformity in five adolescents with severe cerebral palsy. The indications for surgery were severe deformity, pain, brace intolerance, difficulties with shoe wear, and progressive loss of transfer, standing, or walking ability. The goals of surgery were deformity correction, reduced bracing, and ability to wear regular shoes and to maintain function.

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The small number of long-term studies performed after successful arthrodesis suggests that most patients are satisfied with their outcomes. Some patients, however, eventually become limited by pain and degenerative changes elsewhere in the foot. Over time, subjacent joint arthritis is highly likely, especially that which involves the subtalar and talonavicular joints.

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Ankle arthroplasty for post-traumatic tibiotalar arthritis remains controversial. The current literature strongly recommends arthrodesis, especially in those patients who will overload the joint: the young, the active and the overweight patients. The case described here is a 40-year follow up.

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