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Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_13 | Pages 3 - 3
17 Jun 2024
Aamir J Huxley T Clarke M Dalal N Johnston A Rigkos D Kutty J Gunn C Condurache C McKeever D Gomaa A Mason L
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Introduction

Deltoid ligament reconstruction (DLR) is an important factor in the consideration of pes planus deformity. There is little evidence in the literature determining whether DLR could mitigate the risk of patients acquiring flat foot postoperatively following deltoid ligament injury.

Aim

Our objective was to establish if there was a difference in pes planus deformity in patients who underwent DLR during their ankle fracture fixation compared to those who did not.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_13 | Pages 8 - 8
17 Jun 2024
Aamir J Caldwell R Long S Sreenivasan S Mayrotas J Panera A Jeevaresan S Mason L
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Background

Many approaches to management of medial malleolar fractures are described in the literature however, their morphology is under investigated. The aim of this study was to analyse the morphology of medial malleolar fractures to identify any association with medial malleolar fracture non-union or malunion.

Methods

Patients who had undergone surgical fixation of their MMF were identified from 2012 to 2022, using electronic patient records in a single centre. Analysis of their preoperative, intraoperative, and postoperative radiographs was performed to determine their morphology and prevalence of non-union and malunion. Lauge-Hansen classification was used to characterise ankle fracture morphology and Herscovici classification to characterise MMF morphology.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_13 | Pages 9 - 9
17 Jun 2024
Mason L Mangwani J Malhotra K Houchen-Wolloff L
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Introduction

VTE is a possible complication of foot and ankle surgery, however there is an absence of agreement on contributing risk factors in the development of VTE. The primary outcome of this study was to analyse the 90-day incidence of symptomatic VTE following foot and ankle surgery and to determine which factors may increase the risk of VTE.

Methods

This was a national, multi-centre prospective audit spanning a collection duration of 9 months (2022/2023). Primary outcomes included incidence of symptomatic VTE and VTE related mortality up to 90 days following foot and ankle surgery and Achilles tendon rupture, and analysis of risk factors.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_13 | Pages 5 - 5
17 Jun 2024
Aamir J Caldwell R Karthikappallil D Tanaka H Elbannan M Mason L
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Background

Lisfranc fracture dislocations are uncommon injuries, which frequently require surgical intervention. Currently, there is varying evidence on the diagnostic utility of plain radiographs (XR) and CT in identifying Lisfranc injuries and concomitant fractures. Our aim was to identify the utility of XR as compared to CT, with the nul hypothesis that there was no difference in fracture identification.

Methods

A retrospective assessment of patients who had sustained a Lisfranc injury between 2013 and 2022 across two trauma centres within the United Kingdom who underwent surgery. Pre-operative XR and CT images were reviewed independently by 2 reviewers to identify the presence of associated fractures.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_12 | Pages 8 - 8
10 Jun 2024
Airey G Aamir J Chapman J Tanaka H Elbannan M Singh A Mangwani J Kyaw H Jeyaseelan L Mason L
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Background

Research on midfoot injuries have primarily concentrated on the central column and the Lisfranc ligament without amassing evidence on lateral column injuries. Lateral column injuries have historically been treated with Kirschner wire fixation when encountered.

Objective

Our aim in this study was to analyse lateral column injuries to the midfoot, their method of treatment and the radiological lateral column outcomes. Our nul hypothesis being that fixation is required to obtain and maintain lateral column alignment.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_12 | Pages 5 - 5
10 Jun 2024
Gomaa A Heeran N Roper L Airey G Gangadharan R Mason L Bond A
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Introduction

Fibula shortening with an intact anterior tibiofibular ligament (ATFL) and medial ligament instability causes lateral translation of the talus. Our hypothesis was that the interaction of the AITFL tubercle of the fibular with the tibial incisura would propagate lateral translation due to the size differential.

Aim

To assess what degree of shortening of the fibular would cause the lateral translation of the talus.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_11 | Pages 10 - 10
4 Jun 2024
Houchen-Wollof L Mason L Mangwani J Malhotra K
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Objectives

The primary aim was to determine the differences in COVID-19 infection rate and 30 day mortality in patients undergoing foot and ankle surgery between different treatment pathways over the two phases of the UK-FALCON audit, spanning the first and second national lockdowns.

Design

Multicentre retrospective national audit.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_11 | Pages 12 - 12
4 Jun 2024
Chapman J Choudhary Z Gupta S Airey G Mason L
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Introduction

Treatment pathways of 5th metatarsal fractures are commonly directed based on fracture classification, with Jones types for example, requiring closer observation and possibly more aggressive management.

Primary objective

To investigate the reliability of assessment of subtypes of 5th metatarsal fractures by different observers.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_10 | Pages 4 - 4
23 May 2024
Houchen-Wollof L Malhotra K Mangwani J Mason L
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Objectives

The primary objective was to determine the incidence of COVID-19 infection and 30-day mortality in patients undergoing foot and ankle surgery during the global pandemic. Secondary objectives were to determine if there was a change in infection and complication profile with changes introduced in practice.

Design

Multicentre retrospective national audit.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_9 | Pages 6 - 6
16 May 2024
Gandham S Leong E McDonnell S Molloy A Mason L Robinson A
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Introduction

Positive reports from implant designer centres on the use of fibular nails in the complex ankle fractures has resulted in a marked increase in their use nationally. Our aim in this study was to report on the outcomes of the use of all fibular nails in two major trauma centres.

Methods

All patients who underwent ankle fracture fixation using a fibular nail in two major trauma centres, were included for analysis. MTC 1 included patients from April 2013 to May 2015, and MTC 2 included patients February 2015 to March 2018. A minimum follow up of 1 year was achieved for all patients. Radiographic reduction was confirmed by Pettrones criteria at time of operation and at 6 weeks and 1 year post-operatively. Kellgren Lawrence radiographic criteria was used to classify osteoarthritis. All complications and further surgery were recorded.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_9 | Pages 13 - 13
16 May 2024
Lambert L Davies M Mangwani J Molloy A Mason L
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Introduction

Anatomic reduction of talar body fractures is critical in restoring congruency to the talocrural joint. Previous studies have indicated a maximum of 25% talar body exposure without malleolar osteotomy. The aim of this study was to investigate the percentage talar body exposure when using the lateral transligamentous approach.

Methods

The lateral transligamentous approach to the talus was undertaken in 10 fresh frozen cadaveric specimens by surgeons inexperienced in the approach, following demonstration of the technique. An incision was made on the anterolateral aspect of the ankle augmented by the removal of the anterior talofibular ligament (ATFL) and the calcaneofibular ligament (CFL) from their fibular insertions. A bone lever was then placed behind the lateral aspect of the talus and levered forward with the foot in equinus and inversion.

The talus was disarticulated and high resolution images were taken of the talar dome surface. The images were overlain with a reproducible nine-grid division. Accessibility to each zone within the grid with a perpendicular surgical blade was documented. ImageJ software was used to calculate the surface area exposed with each approach.


Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_7 | Pages 23 - 23
8 May 2024
Jayatilaka M Fisher A Fisher L Molloy A Mason L
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Introduction

The treatment of posterior malleolar fractures is developing. Mason and Molloy (Foot Ankle Int. 2017 Nov;38(11):1229-1235) identified only 49% of posterior malleolar rotational pilon type fractures had syndesmotic instabilities. This was against general thinking that fixation of such a fragment would stabilize the syndesmosis.

Methods

We examined 10 cadaveric lower limbs that had been preserved for dissection at the Human Anatomy and Resource Centre at Liverpool University in a solution of formaldehyde. The lower limbs were carefully dissected to identify the ligamentous structures on the posterior aspect of the ankle. To compare the size to the rotational pilon posterior malleolar fracture (Mason and Molloy 2A and B) we gathered information from our posterior malleolar fracture database. 3D CT imaging was analysed using our department PACS system.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_10 | Pages 34 - 34
1 Jun 2023
Airey G Chapman J Mason L Harrison W
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Introduction

Open fragility ankle fractures involve complex decision making. There is no consensus on the method of surgical management. Our aim in this study was to analyse current management of these patients in a major trauma centre (MTC).

Materials & Methods

This cohort study evaluates the management of geriatric (≥65years) open ankle fractures in a MTC (November 2020–November 2022). The method, timing(s) and personnel involved in surgical care were assessed. Weightbearing status over the treatment course was monitored. Patient frailty was measured using the clinical frailty score (CFS).


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_5 | Pages 47 - 47
1 Apr 2022
Myatt D Stringer H Mason L Fischer B
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Introduction

Diaphyseal tibial fractures account for approximately 1.9% of adult fractures. Several studies demonstrate a high proportion of diaphyseal tibial fractures have ipsilateral occult posterior malleolus fractures, this ranges from 22–92.3%.

Materials and Methods

A retrospective review of a prospectively collected database was performed at Liverpool University Hospitals NHS Foundation Trust between 1/1/2013 and 9/11/2020. The inclusion criteria were patients over 16, with a diaphyseal tibial fracture and who underwent a CT. The articular fracture extension was categorised into either posterior malleolar (PM) or other fracture


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_5 | Pages 48 - 48
1 Apr 2022
Myatt D Stringer H Mason L Fischer B
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Introduction

Diaphyseal tibial fractures account for approximately 1.9% of adult fractures. Studies have demonstrated a high proportion have ipsilateral occult posterior malleolus fractures. We hypothesize that this rotational element will be highlighted using the Mason & Molloy Classification.

Materials and Methods

A retrospective review of a prospectively collected database was performed at Liverpool University Hospitals NHS Foundation Trust between 1/1/2013 and 9/11/2020. The inclusion criteria were patients over 16, with a diaphyseal tibial fracture, who underwent a CT. The Mason and Molloy posterior malleolus fracture classification system was used.


Bone & Joint Open
Vol. 2, Issue 4 | Pages 216 - 226
1 Apr 2021
Mangwani J Malhotra K Houchen-Wolloff L Mason L

Aims

The primary objective was to determine the incidence of COVID-19 infection and 30-day mortality in patients undergoing foot and ankle surgery during the global pandemic. Secondary objectives were to determine if there was a change in infection and complication profile with changes introduced in practice.

Methods

This UK-based multicentre retrospective national audit studied foot and ankle patients who underwent surgery between 13 January and 31 July 2020, examining time periods pre-UK national lockdown, during lockdown (23 March to 11 May 2020), and post-lockdown. All adult patients undergoing foot and ankle surgery in an operating theatre during the study period were included. A total of 43 centres in England, Scotland, Wales, and Northern Ireland participated. Variables recorded included demographic data, surgical data, comorbidity data, COVID-19 and mortality rates, complications, and infection rates.


Bone & Joint Open
Vol. 1, Issue 12 | Pages 720 - 730
1 Dec 2020
Galloway AM van-Hille T Perry DC Holton C Mason L Richards S Siddle HJ Comer C

Aims

Perthes’ disease is a condition leading to necrosis of the femoral head. It is most common in children aged four to nine years, affecting around one per 1,200 children in the UK. Management typically includes non-surgical treatment options, such as physiotherapy with/without surgical intervention. However, there is significant variation in care with no consensus on the most effective treatment option.

Methods

This systematic review aims to evaluate the effectiveness of non-surgical interventions for the treatment of Perthes’ disease. Comparative studies (experimental or observational) of any non-surgical intervention compared directly with any alternative intervention (surgical, non-surgical or no intervention) were identified from: Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), EMcare, Allied and Complementary Medicine Database (AMED), and the Physiotherapy Evidence Database (PEDro). Data were extracted on interventions compared and methodological quality. For post-intervention primary outcome of radiological scores (Stulberg and/or Mose), event rates for poor scores were calculated with significance values. Secondary outcomes included functional measures, such as range of movement, and patient-reported outcomes such as health-related quality of life.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_21 | Pages 11 - 11
1 Dec 2017
Kaye A Widnall J Redfern J Alsousou J Molloy A Mason L
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Background

There is an increasing acceptance that the clinical outcomes following posterior malleolar fractures are less than satisfactory. In our previous multicenter study (Powell, BOFAS 2016) we showed that the Olerud-Molander Ankle Score (OMAS) was 79 for unimalleolar fractures and 65 for bi malleolar fractures, however it dropped significantly to 54 in trimalleolar fractures. In creating a treatment guiding classification, we report our results in a system change in management of posterior malleolar fractures in our unit.

Method

All fractures were classified according to Mason and Molloy classification (BOFAS 2015, FAI 2017) based on CT scans obtained pre-operatively. This dictated the treatment algorithm. Type 1 fractures underwent syndesmotic fixation. Type 2A fractures underwent ORIF through a posterolateral incision, and type 2B and 3 fractures underwent ORIF through a posteromedial incision. The patient remained NWB for 6 weeks postoperative. Data was collected from December 2014 to July 2017.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_19 | Pages 10 - 10
1 Nov 2016
Ellison P Mason L Williams G Molloy A
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Introduction

The dichotomy between surgical repair and conservative management of acute Achilles tendon ruptures has been eliminated through appropriate functional management. The orthoses used within functional management however, remains variable. Functional treatment works on the premise that the ankle/hindfoot is positioned in sufficient equinus to allow for early weight-bearing on a ‘shortened’ Achilles tendon. Our aim in this study was to test if 2 common walking orthoses achieved a satisfactory equinus position of the hindfoot.

Methods

10 sequentially treated patients with 11 Achilles tendon injuries were assigned either a fixed angle walking boot with wedges (FAWW) or an adjustable external equinus corrected vacuum brace system (EEB). Weight bearing lateral radiographs were obtained in plaster and the orthosis, which were subsequently analysed using a Carestream PACS system. The Mann-Whitney test was used to compare means.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_19 | Pages 16 - 16
1 Nov 2016
Roberts V Mason L Harrison E Molloy A Mangwani J
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Introduction

We performed a longitudinal outcome study involving the operative management of ankle fractures at two university teaching hospitals. This was a retrospective review of the quality of reduction and a prospective study into the functional outcome.

Methods

All patients undergoing open reduction internal fixation of the ankle between November 2006 and November 2007 at one centre, and January to December 2009 at the other were included. Adequacy of reduction was assessed on the initial post-operative radiographs using Pettrone's criterion. The post-operative functional outcome was recorded using the Lower Extremity Functional Scale (LEFS), completed by postal or telephone follow-up at 64 months post injury (60–74 months).


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_19 | Pages 1 - 1
1 Nov 2016
Williams G Kadakia A Ellison P Mason L Molloy A
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Introduction

Traditional treatment of idiopathic flatfoot in the adult population include calcaneal neck lengthening or fusions. These surgical methods result in abnormal function with significant complication rates. Our prospective study aimed to quantify the functional and radiological outcome of a new technique for spring ligament reconstruction using a hamstring graft, calcaneal osteotomy and medial head of gastrocnemius recession if appropriate.

Methods

22 feet were identified from the senior authors flatfoot reconstructions over a 3 year period (Jan 2013 to Dec 2015). 9 feet underwent a spring ligament reconstruction. The control group were 13 feet treated with standard tibialis posterior reconstruction surgery. Follow up ranged from 8 to 49 months. Functional assessment comprised VAS heath and pain scales, EQ-5D and MOXFQ scores. Radiographic analysis was performed for standardised parameters.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_19 | Pages 24 - 24
1 Nov 2016
Williams G Butcher C Molloy A Mason L
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Introduction

We aimed to retrospectively identify risk factors for delayed / non-union for first metatarsophalangeal joint fusion.

Methods

Case notes and radiograph analysis was performed for operations between April 2014 and April 2016 with at least 3 months post-operative follow up. Union was defined as bridging bone across the fusion site on AP and lateral radiographic views with no movement or pain at the MTPJ on examination. If union was not certain, CT scans were performed. All patients operations were performed/supervised by one of three consultant foot surgeons. Surgery was performed through a dorsal approach using the Anchorage compression plate. Blinded pre-operative AP radiographs were analysed for the presence of a severe hallux valgus angle equal or above 40 degrees. Measurement intra-observer reliability was acceptable (95%CI:1.6–2.3 degrees). Smoking and medical conditions associated with non-union underwent univariate analysis for significance.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_14 | Pages 6 - 6
1 Dec 2015
Marlow W Molloy A Mason L
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There is an increasing acceptance that the clinical outcomes following posterior malleolar fractures are less than satisfactory. Current ankle classification systems do not account for differences in fracture patterns or injury mechanisms, and as such, the clinical outcomes of these fractures are difficult to interpret. The aim of this study was to analyse our posterior malleolar fractures to better understand the anatomy of the fracture.

In a series of 42 consecutive posterior malleolar, who all underwent CT imaging, we have described anatomically different fracture patterns dictated by the direction of the force and dependent on talus loading. We found 3 separate categories. Type 1 – a rotational injury in an unloaded talus resulted in an extraarticular posterior avulsion of the posterior ligaments. This occurred in 10 patients and was most commonly associated with either a high fibular spiral fracture or a low fibular fracture with Wagstaffe fragment avulsion. The syndesmosis was usually disrupted in these patients. Type 2 – a rotational injury in a loaded talus resulting in a posterolateral articular fracture, of the posterior incisura. This occurred in 16 patients and was most commonly associated with a posterior syndesmosis injury, low fibular spiral fracture and an anterior collicular fracture of the medial malleolus. Type 3 – axially loaded talus in plantarflexion causing a posterior pilon. This occurred in 16 patients and was most commonly associated with a long oblique fracture of the fibular and a Y shape fracture of the medial malleolus. The syndesmosis was usually intact in these patients.

In conclusion, the anatomy of the posterior malleolar should not be underestimated and requires careful consideration during treatment and categorisation in outcome studies to prevent misinterpretation.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_17 | Pages 10 - 10
1 Nov 2014
Mason L Dave M Hariharan K
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Introduction:

All reported RA forefoot deformities in the literature so far have arisen from shoe wearing populations. Our aim in this study was to compare hallucal deformities seen in a shod to a non-shod population.

Methods:

A case-control study was undertaken in two specialist foot and ankle units, one in India and one in the UK. All patients suffering from RA and attending for consideration of forefoot surgery from January 2007 to October 2013 were included in this study. Standardized anteroposterior weight bearing radiographs were obtained to measure the hallux valgus, inter-metatarsal and metatarsus primus varus angles.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_17 | Pages 24 - 24
1 Nov 2014
Mason L Durston A Okwerekwu G Kadambande S Hariharan K
Full Access

Introduction:

There are concerns with the use of the Shannon burr in calcaneal osteotomies entered from the lateral side, with the medial structures possibly at risk when performing the osteotomy of the medial calcaneal wall. Our aims with this study were to investigate the neurovascular relationships with the calcaneal osteotomy performed using a Shannon burr.

Methods:

This study was performed at the anatomy department, University of Sussex, Brighton. There were 13 fresh frozen below knee cadaveric specimens obtained for this study. The osteotomy was performed using a Shannon burr using a minimally invasive technique. The neurovascular structures were then dissected out to analyse their relation and any damage.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_11 | Pages 14 - 14
1 Feb 2013
Mason L Wilson-Jones N Williams P
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Aim

Case Report presentation of traumatic cartilage loss in a child.

Method

We present a case report of a 3-year-old girl who sustained a severe open fracture dislocation of her talus with complete loss of full thickness articular cartilage and subchondral bone over 80% of the talar dome. At presentation there was also a Salter Harris I fracture of the fibular, and an extensive soft tissue defect including absent anterior joint capsule. She required a free anterolateral thigh (ALT) flap to reconstruct this defect. The talar dome defect was treated with a cell-free chondro-inductive implant. This was the first use of this implant in the UK and the first use of such an implant in a child anywhere in the world.


Bone & Joint 360
Vol. 1, Issue 3 | Pages 35 - 36
1 Jun 2012
Mason L


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXII | Pages 25 - 25
1 May 2012
Mason L Tanaka H Hariharan K
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The aetiology of hallux valgus is well published and largely debated. Hypermobility at the TMTJ was initially described by Morton, but it was not till Lapidus that its association with hallux valgus was hypothesized. However, little has been published on the anatomy of the tarsometatarsal joint. Our aim was to determine whether there was an anatomical basis for the coronal hypermobility in hallux valgus.

Method

Anatomical dissection was completed on 42 feet from 23 bodies. Presence of hallux valgus was noted (displacement of sesamoids). Measurements and photographs were taken of the first tarsometatarsal joint and all differences noted.

Observations

The TMTJ articular morphology is variable. There were 3 separate subtypes identified of the metatarsal articular surface.