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Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_18 | Pages 9 - 9
1 Dec 2014
Aranganathan S Carpenter C Thomas D Hemmadi S O'Doherty D
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Complex congenital foot deformities pose a challenge to the surgeon due to poor results after extensive surgery. We report the clinical outcomes of children with complex congenital foot deformities treated with UMEX® (Universal mini-external fixator System) frames.

This is a prospective review of our experience in patients treated in this way, from 2004 to 2011. The indications for treatment included resistant/recurrent Congenital Talipes Equino Varus (CTEV), cavo-varus deformity secondary to Charcot-Marie-Tooth disease, arthrogryposis, fibular hemimelia and other congenital abnormalities. A total of 32 children (35 feet) have been treated, out of which 22 were male and 10 were female patients. Age at surgery ranged from 3 to 15 years (median age – 7 years). Three patients underwent bilateral procedures; the reminder (29 patients) underwent unilateral foot operations. Twenty-eight patients had undergone previous surgery including soft-tissue and/or bony corrective procedures.

The frames were removed at an average of 69 days after application, and the patients spent a further 6 weeks in a walking cast. Good functional outcomes were noted in 26 patients in the first postoperative year and in 19 patients in the fifth postoperative year. Further operations were needed in 10 patients. Complications occurred in 10 patients, predominantly pin-site infections and 1 case of bony overgrowth at pin-site and 1 of proximal tibio-fibular diastasis.

This is a simple fixator to use with a short learning curve. In groups of patients with complex congenital abnormalities, we achieved good functional outcome with low-complication rates.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_27 | Pages 26 - 26
1 Jul 2013
Robati S Ghosh K Packianather M O'Doherty D
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The Lubinus SP2 femoral stem has a 10 year survivorship of 96%. Curiosity lies in that force-closed stem designs such as the Exeter appear to be more superior to that of the composite-beam like the Lubinus which performs best compared with all other stem types. Biomechanical comparisons of the stress distributions between native and implanted human femora with a cemented Lubinus stem simulating an everyday clinical activity were made. Rosette strain gauges were placed onto fourth generation composite cortical sawbone femora and placed within a hemipelvis rig simulating the dynamic position of the femur during single-legged stance. The femora were then implanted with the Lubinus and principal strain measurements calculated for both intact and implanted femora. These values correlate directly with stress. Statistical calculations were carried out including a two-way ANOVA and Student's unpaired t-test so as to ascertain any relationship between the intact and implanted femora strain values.

There were significant decreases (p<0.05) in principal tensile and principal compressive strains upon implantation in the proximal and distal areas of the femur. However, there were insignificant changes (p>0.05) in principal tensile strains at the mid-stem and insignificant changes (p>0.05) in principal compressive strains at both the mid-stem and distal areas.

This is the largest biomechanical study to be carried out on this stem and the first in the English language. Changes in principal stresses were not significant in all aspects of the femur upon implantation which appears to give some biomechanical explanation to its clinical success.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_9 | Pages 16 - 16
1 Feb 2013
Aranganathan S Carpenter C Thomas D Hemmadi S O'Doherty D
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We report the clinical outcomes of children with complex congenital foot deformities treated with UMEX® mini-external fixators. This is a prospective review of our experience in patients treated in this way, from 2004. The indications for treatment were resistant/recurrent Congenital Talus Equina Varus(CTEV), cavo-varus deformity secondary to Charcot-Marie-Tooth disease, arthrogryposis, fibular hemimelia and other congenital abnormalities. In addition, one patient underwent this treatment since he was allergic to casting material.

A total of 32 children (35 feet) have been treated, with a male to female ratio of 22:10 respectively. The patient-age at operation ranged between 3 and 15 years (median age −7 years). Three patients underwent bilateral procedures and 29 patients underwent unilateral foot operations. Twenty-eight patients underwent previous soft-tissue and bony corrective operations with serial casting. The frames were removed at an average of 69 days after application with a further 6 weeks in a walking cast. Seventy-nine percent of the patients had good functional outcome. Further operations were needed in 10 patients. Complications occurred in 10 patients, including pin-site infections, bony overgrowth at pin-site and proximal tibio-fibular diastasis.

In conclusion, this is a simple fixator to use with a small learning curve. In groups of patients with complex congenital abnormalities, we achieved good functional outcome with low-complication rates.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXIX | Pages 64 - 64
1 Sep 2012
Mukhopadhyay S Metcalfe A Guha A Mohanty K Hemmadi S Lyons K O'Doherty D
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Introduction

Previous studies have demonstrated the need of accurate reduction of ankle syndesmosis. Measurement of syndesmosis is difficult on plain radiographs. Recently, a difference of 2mm in anterior and posterior measurements at incisura of the inferior tibio-fibular joint on CT has been described as a measure of malreduction (depicted as ‘G’ for ease of description). Our practice changed towards routine post operative bilateral CT following syndesmosis fixation to assess the reduction and identify potential problems at an early stage. The aim of this primarily radiological study was to determine if the use of bilateral cross sectional imaging brings additional benefit above the more conventional practice of unilateral imaging.

Method

Between 2007 and 2009, nineteen patients with ankle fractures involving the syndesmosis were included in the study group who had bilateral CT post operatively. The values of ‘G’ and the mean diastasis (MD) were calculated, representing the average measurement between the fibula and the anterior and posterior incisura.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 1 - 1
1 Sep 2012
Moideen AN Wolf C Donaldson O O'Doherty D
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Background

Exeter Trauma Stem (ETS) is a polished tapered collarless monopolar prosthesis used for cemented hemiarthroplasty for fracture neck of femur. Two modular rasps are available on the instrumentation set. The larger rasp, in practice, rarely fits into the femur making trial reduction impossible. Our hypothesis was that the absence of a trial reduction could affect leg length and stability of the prosthesis.

Aim

To evaluate the leg length discrepancy following use of Exeter Trauma Stem for intracapsular fracture neck of femur.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIX | Pages 23 - 23
1 Jul 2012
Moideen AN Paringe V Ghandour A Wilson C O'Doherty D
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Aim

To determine the effect of the use of radial extracorporeal shockwave therapy (rESWT) in the treatment of patellar tendinopathy.

Methods

Between 2005 and 2010, twenty eight patients (34 knees), who showed poor or no result from conservative management, had rESWT for patellar tendinopathy. The device used is Swiss Dolorclast¯(EMS, Switzerland). All patients received three weekly sessions of 2000 impulses at 3.0 bar (energy flux density = 0.14 mJ/mm2) and a frequency of 15 Hz. We assessed pain, function and activity and quality of life of the patient before and three months after treatment using KOOS (Knee Injury and Osteoarthritis Outcome Score).


The Journal of Bone & Joint Surgery British Volume
Vol. 72-B, Issue 5 | Pages 839 - 842
1 Sep 1990
O'Doherty D Lowrie I Magnussen P Gregg P

We report a prospective randomised trial comparing Keller's arthroplasty and arthrodesis of the first metatarsophalangeal joint for the management of symptomatic hallux valgus and hallux rigidus in the older patient. In 81 patients (110 feet), with a minimum of two years follow-up, both procedures gave a similar degree of patient satisfaction and symptom relief. The incidence of metatarsalgia was also similar. As there were no obvious advantages to arthrodesis, and since six out of 50 arthrodesed toes required revision, we suggest that Keller's arthroplasty is the better operation in these patients.


The Journal of Bone & Joint Surgery British Volume
Vol. 72-B, Issue 1 | Pages 132 - 136
1 Jan 1990
Bickerstaff D Douglas D Burke P O'Doherty D Kanis J

We studied nine patients with Paget's disease affecting the skull or facial bones, who were subsequently treated with either dichloromethylene diphosphonate (clodronate) or ethylene-1-hydroxy-1,1-diphosphonate (etidronate). Long-term treatment induced a clinical and biochemical improvement in eight, and this was associated with a reduction in maxillary or skull volume as assessed by quantitative stereophotogrammetry. The one patient whose disease was resistant to treatment with diphosphonate, showed no change in maxillary shape. These studies suggest that the long-term control of disease activity attained with diphosphonates, results in the improvement of skeletal deformity.


The Journal of Bone & Joint Surgery British Volume
Vol. 70-B, Issue 3 | Pages 488 - 488
1 May 1988
O'Doherty D Ferris B


The Journal of Bone & Joint Surgery British Volume
Vol. 69-B, Issue 5 | Pages 847 - 848
1 Nov 1987
O'Doherty D Lowrie I Gregg P