Introduction. The purpose of this research is to compare the quality of life in children during gradual deformity correction using external fixators with intramedullary lengthening nails. Materials and Methods. Prospective analysis of children during lower limb lengthening. Group A included children who had external fixation, patients in group B had lengthening nails. Patients in each group were followed up during their limb reconstruction. CHU-9D and EQ-5DY instruments were used to measure quality of life at fixed intervals. The first assessment was during the distraction phase (1 month postop.), the second was during the early consolidation phase (3 months postop.) and the final one was late consolidation phase (6–9 months depends on the frame time). Results. Group B patients reported significantly better utility compared to Group A. This was observed during all the stages of the treatment. Group B children were less worried (P 0.004), less sad (P 0.0001), less pain (p <0.0001), less tired (P 0.0002), better school work (P0.0041), better sleep (p 0.016), more able to do sports activities (p 0.004) and, they were more independent (p <0.0001) compared to group B. QALYS was better for the nails group compared to external fixation group 0.44 compared to 0.36 for external fixators. Conclusions. Lengthening nails had the potential to improve the quality of life and utility compared to external fixation. This will help further economic evaluation to measure ICER to further explore the cost effectiveness of these devices

Introduction. A subset of patients in cast awaiting fixation of ankle fractures require conversion to delayed external fixation (dEF). We aimed to evaluate the effect of delayed versus planned external fixation (pEF), then identify objective characteristics contributing to need for conversion. Method. We extracted data from our booking system to identify all ankle external fixation procedures between 2010 to 2022. Exclusions included open fractures, the skeletally immature, and pilon or talus fractures. Fractures were classified using the AO/OTA classification, then a matched cohort was identified based on fracture classification. We compared the planned, delayed and matched cohorts for demographics, posterior malleolar fragment (PMF) ratio, and degree of displacement at presentation. Results. We identified 25 pEF, 42 dEF, and 67 matched patients. Ankles with dEF had a 3.8 day longer time to ORIF from presentation than those who had pEF, and had an infection rate of 9.5%, compared to 4% in the pEF group. Two patients in the dEF group required further operative intervention. There were no infections or reoperations required in the pEF or matched groups. The dEF group were more likely to have ≥2 reductions (OR 4.13), a PMF ratio of >0.23 (OR 5.07), and have increased displacement at time of injury on lateral (32% vs 19%) and AP (62% vs 36%) radiographs. Discussion. Our retrospective study highlights the longer time to operation and increased infection rates of patients who do not get timely external fixation. We propose a series of objective parameters that predict failure of cast treatment and guide the surgeon to consider planned external fixation in some ankle

Introduction. The vast majority of orthopaedic surgeons use C-arm fluoroscopy in the operating theatre when building a circular external fixator. In the absence of previous research in this area, we hypothesised that the surgeon who builds a circular external fixator is exposed to a greater amount of radiation purely as a result of the presence of the metallic fixator in the x-ray beam. The aim of our study therefore was to investigate how the presence of a circular external fixator affects the radiation dose to the surgeon and the surgical assistant. Materials & Methods. A simulated environment was created using a radiolucent operating table, an acrylic lower limb phantom (below knee segment), various configurations of metalic circular external fixation, and a standard size C-arm image intensifier. The variables investigated were 1. the amount of metal in the beam 2. the orientation of the beam (PA vertical vs lateral) 3. the horizonal distance of the person from the beam (surgeon vs assistant) and 4. the vertical distance of the various body parts from the beam (e.g. thyroid, groin). In terms of radiation dose, we recorded two things : 1. the dose produced by the image intensifier 2. the dose rate at standardised positions in the operating theatre. The latter was done using a solid-state survey sensor. These positions represented both where the surgeon and surgical assistant typically stand plus the heights of their various body regions relative to the operating table. Results. The effect of the presence of the circular external fixator : all frame constructs tested resulted in a statistically significant greater radiation dose both produced by the image intensifier and received by the surgical team. The effect of the beam orientation : the PA (vertical) orientation resulted in a statistically significant greater radiation dose for the surgeon than did the lateral orientation, but made no difference for the assistant. The effect of horizontal distance from the beam : unsurprisingly, the surgeon (who was closer to the beam) received a statistically significant greater radiation dose than the assistant. The effect of vertical distance from the beam : for the surgeon, the dose received was highest at the level of the phantom leg / frame, whilst for the assistant there was no statistically significant difference for any level. Conclusions. To our knowledge, this is the first study investigating the radiation dose rate to the orthopaedic surgeon when building a circular external fixator. We found that the surgeon does indeed receive a ‘double whammy’ because the image intensifier puts out a greater amount of radiation plus the metalic frame scatters more of the x-ray beam. Whilst the amounts are relatively small, we think that it's important to quantify doses that orthopaedic surgeons receive to ensure optimal radiation practices

Introduction. Circular external fixators are fundamental to lower limb reconstruction, primarily in situations with a high risk of infection such as open fractures. During the Covid-19 pandemic, use of circular frames in our unit decreased, following departmental approval, due to resource management and in keeping with BOA guidelines as we opted to “consider alternative techniques for patients who require soft tissue reconstruction to avoid multiple operations”. These alternatives included the use of internal fixation (plate osteosynthesis and intramedullary nailing) as a measure to reduce the number of hospital attendances for patients and to conserve resources. This change in practice has continued in part following the pandemic with the increased use of internal fixation in cases previously deemed unsuitable for such techniques. We present our experience of this treatment strategy in the management of complex lower limb injuries, focusing on outcomes and consider the lessons learnt. Materials & Methods. Data of patients with complex lower limb injuries treated before, during and after the pandemic were collected from our in-house trauma database, theatre records and follow up clinics. The rationale for choosing other techniques over a circular frame, the type of alternative technique used, the cost of such alternatives, the need for soft tissue reconstruction, time to recovery, complications and amputation rates were compared among groups. Results. These data suggest comparable outcomes between circular frames and alternative techniques can be achieved. A notable reduction in the number of circular frames applied during the review period was observed. Furthermore, frame fixation was associated with more frequent outpatient review and the associated implications for resource management. Conclusions. Conclusion: The Covid-19 pandemic has posed great challenges to the Trauma and Orthopaedic community, forcing us to be flexible by adopting alternative treatment methods to traditional circular external fixation. These alternatives have proven feasible and potentially more cost effective, prompting their adoption in the post pandemic era. However, this change of practice is not without potential consequences and continued investigation is warranted

Introduction. Knee arthrodesis is a useful limb salvage technique to maintain function in patients with complex and infected total knee arthroplasties (TKA). There are a number of commonly used external fixators, but no consensus on which of these are optimal. The aim of this study was to synthesise the current literature to guide clinical decision making and improve patient outcomes. We systematically review the literature to compare outcomes of external fixators in arthrodesis following infected TKA. Materials & Methods. A systematic review of the literature of primary research articles investigating the use of external fixators for knee arthrodesis after an infected TKA was conducted. Relevant articles were identified with a search strategy on online databases (EMBASE and Medline) and reviewed by two independent reviewers. Clinical outcome measures were independently extracted by two reviewers which included union rate, infection eradication rate, complication rate, time to fusion, and time in frame. Results. Circular frames were more likely to result in union compared to biplanar (OR 1.40 p=0.456) and monoplanar frames (OR 2.28 p=0.018). Infection recurrence was least likely in those treated by circular frames when compared to monoplanar (OR 0.12 p=0.005) and biplanar external fixators (0.41 P=0.331). Complication rates were highest in the circular fixator group, followed by the monoplanar fixator group and biplanar fixator group at 34%, 31% and 11% respectively. Conclusions. Analysis of the available literature suggests higher union and infection eradication rates with circular frames over the other two fixation methods despite a higher complication rate. There is a paucity in the literature and therefore, no firm conclusions can be drawn. Further research investigating the variations and biomechanical properties between different external fixation methods for knee arthrodesis is necessary. Further clarity in reporting and pooled data would be useful for future analysis

A single centre, prospective study of 196 closed tibial diaphyseal fractures treated by monolateral external fixation. Surgical management of all patients followed a protocol of the senior author (PBMT), with regard to technique and fracture reduction. Operations were performed by several different surgeons including the senior author. A definitive fixator was used as a reduction tool in 34 cases, and a separate fracture reduction device was used in 162 patients. Follow-up was in a dedicated external fixator clinic by the senior author until one year post-fracture healing. Fracture healing was determined by fracture stiffness measurements. 196 tibial fractures in 196 patients, average age 29 (range 12-80). 111 right sided and 85 left sided. 166 male and 30 female. 116 fractures due to low energy and 80 due to high energy. Mechanism of injury. football 75, fall 52, RTA 49, others 20. 33 patients had an additional 74 injuries: 38 fractures/dislocations (3 open), 7 compartment syndromes, 7 head injuries, 16 chest injuries, 9 soft tissue injuries. According to AO classification system: 33 A1, 47 A2, 42 A3, 15 B1, 46 B2, 7 B3. Time to fracture healing was 19 weeks on average (range 9-87). 15 patients had coronal deformity >5 degrees and 1 also had saggital deformity >10 degrees. One osteotomy for correction of malunion. 279 pin site infections requiring antibiotics in 35 patients. 7 fixators removed early due to pin site infection. One established osteomyelitis-lautenbach. 7 refractures, all healed (5 with pop, 2 with further fixator). Non-union: 5 hypertrophic, 2 atrophic-all healed with further external fixation. Our results show that external fixation of closed tibial fracture is a viable alternative to other treatment methods with regard to healing time and angular deformity. Our study also uses a well validated end point to define fracture healing and does not rely on the difficulty of defining union on clinical and radiological grounds

Purpose of the study:. To determine the outcomes of cases converted from an external fixator to an internal fixation device in the management of limb reconstructions and deformity corrections. Method:. A retrospective review of 18 patients, that underwent a conversion procedure to internal fixation following long term external fixation use, was done. This comprised 24 limbs. Inclusion criteria: All cases of long term external fixator use converted to internal fixation over a 5 year period. Average external fixation time, pin site care, conversion timing, surgical device used as well as outcome were documented. Results:. The mean treatment time in an external fixator was 185 days (61–370). The reasons for conversion included patient dissatisfaction, pin tract sepsis and a refracture. The conversion procedures included 8 intramedullary nail fixations and 16 plate and screw fixations. An acute conversion was identified as an internal fixation that was done in the same sitting as external fixator removal. A delayed conversion was any internal stabilisation that was done thereafter. In total, the complication rate associated with conversion to internal fixation following long term external fixation was 25%, mainly due to persistent non-union or sepsis. In the 8 conversions to intramedullary nails, 7 were acute: 4 had good outcomes with sepsis free union being achieved. 3 had poorer outcomes with a non-union and 2 amputations being documented. The single delayed nailing achieved union. In the 16 conversions to plate fixation, 13 achieved union. 10 were acute conversions and 3 were delayed. The remaining 3 that developed complications included 2 acute conversions with septic non-unions and a single delayed conversion which resulted in sepsis. Conclusion:. Conversion of an external fixator to an internal fixator in a non-acute reconstructive setting has a 75% success rate. In the acute conversion group (19 cases), plate and screw fixation had a superior outcome. In the delayed conversion group (5 cases), intramedullary fixation was favoured

The purpose of this study was to evaluate and to compare the mechanical stability of external fixation with and without ankle spanning fixation using a foot plate in an in-vitro model of periarticular distal tibia osteotomy/fracture. Ten fresh frozen lower extremities (five pairs) with a simulated distal tibia osteotomy/fracture were stabilised with an Ilizarov hybrid fixator with and without a foot plate. All specimens were loaded using a servohydraulic load frame. Relative interfragmentary motions (vertical and horizontal translations, and rotation) were measured. Statistical analysis was performed as a paired t-test to compare the different frame constructs. A p<0.05 was considered indicative of a significant difference between fixator constructs. The vertical displacement measured at the centre of the distal fragment under load with the foot plate was such that the bone fragments became closer together (-0.83±0.64 mm). Loading of specimens without the foot plate resulted in distraction of the distal fragment (2.57±0.97 mm). The difference was statistically significant (p<0.05). The horizontal displacement of distal fragment with (1.12±0.98 mm) was not significantly different from the motion without (1.19±1.23 mm) a foot plate and was in the anterior direction in both cases. Loading of the construct with the foot plate caused sagittal plane angulation of the fragments with the osteotomy/fracture gap opening anteriorly (-1.15±0.61 deg.). Loading of the construct without a foot plate resulted in sagittal plane angulation of fragments with the gap opening posteriorly (4.49±0.45 deg.). These motion differences were statistically significant (p<0.05). There was not a statistically significant difference between the order of testing the construct with a foot plate and the construct without it (p>0.05). Fixators with ankle spanning using foot plates increase the mechanical stiffness of external fixation of periarticular distal tibia osteotomy/fracture

To present the results achieved with the use of external fixation techniques in treating 52 cases of post-traumatic and post-surgical septic non-union in a low resources setting. From 2006 to 2014 52 patients were treated for post-traumatic septic non-union of the lower and upper limb bones. Clinical records and radiographs were reviewed; telephone interviews were done for patients unable to reach our institution. There were 39 males and 13 females, with an average age at the time of admission of 29 years (the youngest patient was 8 years old, the oldest 81). Tibia was involved in 43 cases (24 right side, 19 left side), femur in 9 (4 right, 5 left) and left humerus in 1. All the patients, except two, had been treated in other institutions before admission. At presentation, 19 patients had an external fixator in situ, 18 patients had infected osteosynthesis, 15 had exposed necrotic bone, with loss of soft tissues. In 20 cases hardware removal, debridement and sequestrectomy were followed by application of an external fixator. In 31 cases bone transport was done; the fixator was monolateral in 27 cases. In 1 case sequestrectomy and external fixation were followed by a vascularized fibula graft. Bifocal bone transport was utilized in one patient while the bone transport procedure was associated to limb lengthening in 10 patients. Plastic surgery was required in 13 patients. Rotational flaps, vascularized free flaps and extensive skin grafts were all used. The site of non union was cured in all the patients, in an average time of 11 months (from 4 to 32). Two patients required an amputation a few months after the end of the treatment. There was need for fixator adjustment and screws replacement in 21 patients. Non-union at the docking point was observed in 5 patients; it was septic in two of them. There was need of skin-plasty in 2 cases for skin invagination. In 3 cases an extensive skin ulcer was observed during the transport procedure. Limb length discrepancy was corrected in 10 patients. A residual limb shortening was observed in 14 patients. Ankle fusion, knee fusion, foot drop, sensory loss in the foot, reduced range of joint motion were also observed. The external fixator plays a pivotal role in the treatment of septic non unions, especially in low resources setting. The treatment is long and costly. Strict medical supervision is necessary during the entire process

Management of open tibial fractures remains controversial. We hypothesised that unreamed intramedullary nail offers inherent advantages of nail as well as external fixation. We undertook a prospective randomised study to compare the results of management of open tibial fractures with either an external fixator or an undreamed intramedullary nail until fracture union or failure. Our study included 30 consecutive open tibial fractures (Gustilo I, II & IIIA) between 4 cm distal to knee and 4 cm proximal to ankle in skeletally mature adults, who presented to a level-1 trauma centre. Alternate patients were treated by either external fixation and unreamed nailing i.e. 15 in each group. Standard protocol for debridement and fixation was followed in all cases. All external fixators were removed at 6 weeks. All cases were followed up until fracture union, the main outcome measurement. 26 (87%) were males and 4 (13%) females; age range was 20-60 years (average 33.8). All fractures in both groups united. Time to union averaged 7.9 months for both groups. Incidence of wound problems, infection, hardware failure and delayed union were comparable. However, there was higher incidence of angular deformities and stiffness of knee and ankle in external fixation group, although not statistically significant. We found no statistically significant difference between unreamed intramedullary nailing and external fixation for the management of open tibial diaphyseal fractures, although ease of weight bearing as well as absence of angular deformities and joint stiffness were distinct advantages in the nail group. Therefore we recommend unreamed nail for Gustilo I, II and IIIA open tibial fractures

Introduction. Indications for the use of external fixation include damage control orthopaedics, definitive fracture treatment, deformity correction and leg lengthening. Despite many advances in the development of external fixation techniques, pin-tract infection and loosening are still significant complications. They are the most commonly occurring complications during limb lengthening using external fixation, with some studies reporting an incidence of up to 80%. Objectives. The main aim of this systematic review was to investigate HA-coated versus uncoated external fixator pins used in patients undergoing leg lengthening and determine benefits in terms of pin loosening, infection and loss of reduction/malunion. Methods. A systematic literature search of MEDLINE (PubMed), EMBASE and Cochrane library databases was undertaken. Comparative trials investigating HA-coated versus uncoated external fixation pins used in patients undergoing leg lengthening procedures were identified. These were critically appraised as per the CASP (Guyatt et al) and CONSORT guidelines (Schulz et al., 2010). Primary outcome measures included pin loosening and infection. Secondary outcome measures included loss of reduction/malunion. Results. All studies identified had different criteria for defining pin loosening and infection. However, they all demonstrated a statistically significant reduction in loosening with HA-coated pins. Review of the studies included demonstrated insufficient evidence to determine any significant clinical benefit with regards to infection and malunion. Critical appraisal demonstrated average methodological quality of the studies. Conclusion. HA-coating of external fixator pins improves bone fixation and reduces loosening in patients undergoing leg lengthening procedures, but the influence on infection and malunion is not clear

Purpose of Study. Bicondylar tibial plateau fractures are serious injuries to a major weight bearing joint. These injuries are often associated with severe soft tissue injuries that complicate the surgical management. This retrospective study evaluates the management of these high-energy injuries with the use of limited open reduction and fine wire circular external fixation. Methods. Between July 2008 and June 2012, 54 consecutive patients (19 females and 35 males) with high-energy tibial plateau fractures were treated at our tertiary level government hospital. All patients were treated with limited open reduction, and cannulated screw fixation combined with fine wire circular external fixators as the definitive management. The records of these patients were reviewed. Results. Forty-six patients met the inclusion and exclusion criteria. Thirty-six patients had Schatzker type-VI and ten patients had Schatzker type-V fractures. All fractures united without loss of operative reduction. No wound complications, osteomyelitis or septic arthritis occurred. Average Knee Society Clinical Rating Score was 81.6, translating to good clinical results. Minor pin tract infection was the most common complication encountered. Conclusion. Fine wire circular external fixation combined with limited open reduction and cannulated screw fixation consistently produced good functional results without serious complications. NO DISCLOSURES

Introduction. To report our early experience and suitability over unicortical fixation system to reduce and hold the bone fragments in position during a CHAOS procedure of the femur or tibia during lower limb reconstruction surgery. Materials and Methods. We report a case series of the first consecutive 10 patients (11 bones) for which this CHAOS technique was used between May 2017 and October 2019 by the same surgeon. The novel aspect of the procedure was the use of a unicortical device, Galaxy UNYCO (Orthofix, Verona, Italy), which eliminate the need for any change of fixation during the procedure. It also means the intramedullary canal was left free for the intramedullary nailing. Results. We treated 4 femurs and 7 tibias with this technique without any loss or failure of the construct. We treated uniplanar and multiplanar deformities with the angulations between 8 degrees of valgus to 15 degrees of varus and from 0 to 8 mm translation in the AP view, from 20 degrees procurvatum to 15 degrees recurvatum and 0 to 2 mm translation on the lateral view and from 20 degrees internal rotation to 5 degrees external rotation and 0 to 10 mm translation on axial view. Conclusions. The construct was able to deal with the total tension in the system both in the correction phase and the additional stress applied during insertion of a nail such as reaming and impacting the nail to the canal. The potential advantage also included the possibility of intramedullary nailing without interference with the external fixation device

Purpose of the study:. Is circular external fixation a safe and effective method of managing closed distal third tibia fractures. These fractures are conventionally treated with plaster casts, intramedullary nails or plate fixation. These treatment modalities have complication rates in the literature of up to 16% malunion, 12% non-union, and 17% deep infections. Description and Methods:. Retrospective review of 18 patients with closed distal third tibia fractures, with or without extension into the ankle joint, treated with circular fixator systems and minimal percutaneous internal fixation of the intra-articular fragment if required. Patients were followed up for time to union, malunion incidence as well as incidence of pin tract and deep infection. Distal third fractures which were extra articular or with simple intra articular extension were included. (AO 43 A, B1, C1, C2 + AO 42 in distal third) Patients with pilon fractures (AO 43 B2, B3 and C3) were excluded. Summary of results:. The average time to union in these patients was 16 weeks (11–33 weeks). The non-union rate was 11.1% in comparison to 12% with conventional treatment. The malunion rate was 0% compared to 16% with conventional treatment. The incidence of pin tract infection was 16.6%, but no deep infections were noted, whilst conventional treatment shows deep infection in up to 17%. Conclusion:. Circular external fixation is a safe and efficient option in the treatment of distal tibia fractures. The incidence of complications is significantly reduced in comparison to conventional treatment

Purpose. To elucidate whether there is an advantage in external fixation supplementation of K-wires in comparison to K-wires and plaster, in the treatment of distal radius fractures without metaphyseal comminution. Indications. Distal intraarticular radius fractures, Frykman VIII or VIII without metaphyseal comminution. Contraindications. Metaphyseal comminution, general medical contraindications for surgical intervention. Study design. Fifty-one patients were prospectively randomised in two groups: 24 patients were treated with K-wire and spanning external fixation supplementation, and 27 were treated with K-wires and plaster. Results. Patients were monitored following the operation with a minimum follow up of 1 year, and checked independently of surgeon for pain, satisfaction and range of motion. There was a statistically significant difference in favour of the external fixation patient group for pain (Visual Analogue Score, Ex-Fix group: mean 14.9, plaster group: mean 28.1, p<0.001) and satisfaction (Ex-Fix group: mean 89.7, plaster group: mean 76.3, p<0.001,). Although one would expect that range of motion would be reduced in the external fixation group, there were no statistically significant differences found in favour of plaster; on the contrary supination results were surprisingly in favour of the external fixation group (Ex-Fix group: mean 54.4, plaster group: mean 45.2, p<0.05). Conclusion. In this study, external fixation supplementation of K-wiring had statistically significant superior results in patient satisfaction score, pain score, and wrist supination in comparison to plaster augmentation of K-wiring

Introduction

Despite all modern advances the indications and possibilities of treatment in Legg-Calvé-Perthes Disease (LCPD) are still controversial. In the past 15 years we started using arthrodiastasis of the hip creating negative pressure over the avascular femoral head in some selected cases of LCPD in the active phasis of the disease. Now we present our experience with distraction in LCPD using the original Ilizarov circular frame for the hip.

Introduction:. Distal humerus fractures as well as elbow fracture dislocation are often accompanied by soft tissue damage that warrants early fixation with an external fixator. The distal humerus is a hazardous area for placement of an external fixator due to the close proximity of the radial nerve to the humerus in this area. No known safe zone has been identified on the lateral border of the humerus to avoid radial nerve damage. The aim of this study was to record the incidence of radial nerve damage by placing two 4 mm pins into the humerus and to note the relation of the nerve to the pins. Methods:. Two 4 mm pins used to fix an external fixator were drilled into the lateral border of the humerus at points 100 mm and 70 mm proximal to the lateral epicondyle of both arms of 39 cadavers. The 30 mm interval between the pins is the interval between the pins in a pinblock of a commonly-used external fixator. The arms were dissected by medical students and the incidence of radial nerve damage was recorded. Statistical analysis was done using a Fischer's exact test to identify the incidence of nerve damage relative to pin insertion. The number of damaged nerves was compared to the number of non-damaged nerves. A design based Chi Square test was carried out to test left and right arms. The proportions of interest were estimated along a 95% confidence interval. Results:. The radial nerve was hit (damaged) by 56.4% of the proximal and 20.5% of the distal pins. The radial nerve ran posterior to the proximal pin in 2.57% of arms and 0% to the distal pin. Conclusion:. Although no clear safe zone could be established, pins should be placed closer than 100 mm from the lateral epicondyle and as posterior on the humerus as possible to minimize the risk for radial nerve damage. Keywords: Radial nerve, external fixation, humerus fractures

Purpose:. This study attempts to establish whether biomechanical manipulation through distraction can result in fracture union. Method:. A retrospective clinical audit of 15 patients with delayed or hypertrophic non-unions treated successfully with closed distraction in circular external fixation. Average time to union, complications and complication rates were also reviewed. Inclusion criteria: all patients with delayed or hypertrophic non-union, treated by closed distraction between 2004 and 2011. Results:. Fifteen patients included in the study. The average time to union was 188 days. The most common complication was local pin tract sepsis. The most serious complication was a broken fixation ring that needed replacement. Conclusion:. Biomechanical fracture strain is calculated by dividing the fracture gap distance by the change in the fracture distance i.e. FRACTURE STRAIN = DIFFERENCE IN L/L Hypertrophic non-union occurs when the fracture strain is more than 10 %. This formula shows that by increasing the fracture gap, the fracture strain will decrease This concept is contrary to the current practice of compressing the fracture. This study shows that distraction can be used to manipulate the biomechanical circumstances that dictate the development of fracture non-union. Furthermore ring fixators are ideal devices to use for biomechanical manipulation

Introduction

Ilizarov fixators are reliant on tensioned fine wires for stability. The tension in the wires is generated using specific tensioning devices. Loss of wire tension over time may lead of loss a stability and complications. A series of in vitro experiments were undertaken to explore wire tensioner accuracy, the impact of fixation bolt torque and initial tension on loss of tension in ilizarov constructs under static and dynamic loads.

Introduction

Temporary spanning fixation aims to provide bony stability whilst allowing access and resuscitation of traumatised soft-tissues. Conventional monolateral fixators are prone to half-pin morbidity in feet, variation in construct stability and limited weight-bearing potential. This study compares traditional delta-frame fixators to a circular trauma frame; a virtual tibial ring block spanned onto a fine-wire foot ring fixation.