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Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_7 | Pages 14 - 14
8 May 2024
Morley W Dawe E Boyd R Creasy J Grice J Marsland D Taylor H
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Introduction

Osteoarthritis in the foot and ankle affects approximately 30,000 patients annually in the UK. Evidence has shown that excess weight exacerbates foot pain, with significant increases in joint forces. However, despite the current trend for Clinical Commissioning Groups to ration surgery for obese patients, studies have not yet determined the effect of weight loss in obese patients with foot and ankle arthritis.

Aim

Pilot study to investigate the effect of simulated weight loss on pain scores in obese patients with symptomatic foot and ankle arthritis.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_7 | Pages 10 - 10
1 May 2018
Monk P Boyd R Brown C Gibbons M Alvand A Price A
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The optimal correction of the weight bearing line during High Tibial Osteotomy has not been determined. We used finite element modelling to simulate the effect that increasing opening wedge HTO has on the distribution of stress and pressure through the knee joint during normal gait.

Subject-specific models were developed by combining geometry from 7T MRI scans and applied joint loads from ground reaction forces measured during level walking. Baseline stresses and pressures on the articulating proximal tibial cartilage and menisci were calculated. Progressive osteotomies were then simulated to shift the weight-bearing line from the native alignment towards/into the lateral compartment (between 40 – 80% of medial-lateral tibial width). Changes in calculated stresses and pressures were recorded.

Both stress and pressure decreased in the medial compartment and increased in the lateral compartment as increasingly valgus osteotomies were simulated. The models demonstrated a consistent “safe zone” for weight bearing line position at 50%-65% medial-lateral tibial width, outside of which compartment stresses and pressures substantial increased.

This study suggests a safe correction zone within which a medial opening wedge HTO can be performed correcting the WBL to 55% medio-lateral width of the tibia.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_21 | Pages 10 - 10
1 Dec 2017
Boyd R Bintcliffe F
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Introduction

Injury to the syndesmosis is not always clearly demonstrated on radiographs and different tests have been described to assess for injury. In the presence of a significant injury to the syndesmosis, surgical fixation is often indicated and various fixation methods have been described. If the result of surgery is any mal-reduction of the fibula, this may result in ongoing ankle pain. Assessing how well the fibula has been reduced intra-operatively is currently limited to image intensifier views. We have previously developed a simple assessment, which has been shown to give accurate intra-operative demonstration of an injury to the syndesmosis. Our objective was to ascertain if the same test could demonstrate any malreduction of the fibular after repair of a syndesmosis injury.

Methods

Seven fresh frozen cadavers had complete sydesmosis disruption performed before fixation using a well-recognised technique with a single 3.5 mm small fragment screw. Purposeful malreduction was performed in three ankles and standard reduction in the remaining four. 2–5mls of contrast medium was then injected into the ankle joint.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_5 | Pages 6 - 6
1 May 2015
Boyd R Khaleel A Beckles V
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Background:

Charcot arthropathy is a condition related to the loss of protective sensation of a joint. It normally presents in its early inflammatory phase, followed by bone destruction. Recognised treatment for this is total contact casting (TCC). However, in a small group this may be unsuccessful in preventing deformity progression. TCC can also be difficult in the presence of recalcitrant ulceration and deformed feet.

Method:

40 patients, with a diagnosis of Charcot foot, were followed from presentation in our unit over 3 years. An Ilizarov frame was used for two groups: those in the early phase who showed progressive deformity despite TCC (5 patients) and those with chronic ulceration (4 patients). Frames were modified to allow weight-bearing on the frame (with no foot contact). All other patents were treated with TCC.


The Journal of Bone & Joint Surgery British Volume
Vol. 76-B, Issue 6 | Pages 982 - 983
1 Nov 1994
Cornell M Boyd R Baird G Spencer J


The Journal of Bone & Joint Surgery British Volume
Vol. 72-B, Issue 3 | Pages 370 - 375
1 May 1990
Burr D Milgrom C Boyd R Higgins W Robin G Radin E

We have shown that stress fractures can be induced in the tibial diaphysis of an animal model by the repeated application of non-traumatic impulsive loads. The right hind limbs of 31 rabbits were loaded for three to nine weeks and changes in the bone were monitored by radiography and bone scintigraphy. The presence of stress fractures was confirmed histologically in some cases. Most animals sustained a stress fracture within six weeks and there was a positive correspondence between scintigraphic change and radiological evidence. Microscopic damage was evident at the sites of positive bone scans. The progression, location, and time of onset of stress fractures in this animal model were similar to those in clinical reports, making the model a useful one for the study of the aetiology of stress fractures.