Classical fixation using a circular frame involves two rings per segment and in many units this remains the norm whether using ilizarov or hexapod type frames. We present the results of two ring circular frame at King's College Hospital. A prospective database has been maintained of all frames applied since 2007. Radiographs from frames applied prior to July 2022 were examined. Clinic letters were then used to identify complications. Included: two ring hexapod for fracture, malunion, nonunion, arthrodesis or deformity correction in the lower limb. Excluded: patients under 16 years old, diabetic feet, Charcot joints, soft tissue contractures, arthrodiastasis, correction of the mid/forefoot, plate fixation augmentation, fixation off a third ring.Introduction
Materials & Methods
Angular deformities of the distal femur can be corrected by opening, closing and neutral wedge techniques. Opening wedge (OW) and closing wedge (CW) are popular and well described in the literature. CW and OW techniques lead to leg length difference whereas the advantage of neutral wedge (NW) technique has several unique advantages. NW technique maintains limb length, wedge taken from the closing side is utilised on the opening side and since the angular correction is only half of the measured wedge on either side, translation of distal fragment is minimum. Leg lengths are not altered with this technique hence a useful technique in large deformities. We found no reports of clinical outcomes using NW technique. We present a technique of performing external fixator assisted NW correction of large valgus and varus deformities of distal femur and dual plating and discuss the results. We have treated 20 (22 limbs – 2 patients requiring staged bilateral corrections) patients for distal femoral varus and valgus deformities with CWDFO between 2019 and 2022. Out of these 4 patients (5 limbs) requiring large corrections of distal femoral angular deformities were treated with Neutral Wedge (NW) technique. 3 patients (four limbs) had distal femoral valgus deformity and one distal femoral varus deformity. Indication for NW technique is an angular deformity (varus or valgus of distal femur) requiring > 12 mm opening/closing wedge correction. We approached the closing side first and marked out the half of the calculated wedge with K – wires in a uniplanar fashion. Then an external fixator with two Schanz screws is applied on the opposite side, inserting the distal screw parallel to the articular surface and the proximal screw 6–7 cm proximal to the first pin and at right angles to the femoral shaft mechanical axis. Then the measured wedge is removed and carefully saved. External fixator is now used to close the wedge and over correct, creating an appropriate opening wedge on the opposite side. A Tomofix (Depuoy Synthes) plate is applied on the closing side with two screws proximal to osteotomy and two distally (to be completed later). Next the osteotomy on the opposite side is exposed, the graft is inserted. mLDFA is measured under image intensifier to confirm satisfactory correction. Closing wedge side fixation is then completed followed by fixation of opposite side with a Tomofix or a locking plate.Introduction
Materials & Methods
Open fractures are fortunately rare but pose an even greater challenge due to poor soft tissues, in addition to poor bone quality. Co-morbidities and pre-existing medical conditions, in particular, peripheral vascular diseases make them often unsuitable for free flaps. We present our experience in treating severe open fractures of tibia with Acute Intentional Deformation (AID) to close the soft tissues followed by gradual correction of deformity to achieve anatomical alignment of the tibia and fracture healing with Taylor Spatial Frame. We treated 4 geriatric (3 female and 1 male) patients with Gustillo-Anderson III B fractures of the tibia between 2017–18. All were unfit to undergo orthoplastic procedures (free flap or local flaps). The age range is 69 yrs to 92 years. Co-morbidities included severe rheumatoid arthritis, multiple sclerosis and heart failure. The procedure involved wound debridement, application of two ring Taylor Spatial Frame, acute deformation of the limb on the table to achieve soft-tissue closure/approximation. Regular neurovascular assessments were performed in the immediate post-operative period to monitor for compartment syndrome and nerve compression symptoms. After 7–10 days of latent period, the frame was gradually manipulated, according to a method we had previously published, to achieve anatomical alignment. The frame was removed in clinic after fracture healing.Introduction
Materials and Methods
Charcot Arthropathy related foot and ankle deformities are a serious challenge. Surgical treatment of these deformities is now well established. The traditional surgical method of extensive surgical exposure, excision of bone, acute correction and internal fixation is not always appropriate in presence of active ulceration, deep infection and poor bone quality. Minimally invasive osteotomies and gradual correction of deformities with a circular frame are proving helpful in minimizing complications. We present our experience with the use of Taylor Spatial Frame (TSF) in 10 patients with recurrent ulceration and deformity Our indication for the treatment with TSF is recurrent or intractable ulceration with or without active bone infection or a history of infection in a deformed foot and/or ankle. There are 2 female and 8 male patients in this cohort. We used a long bone module for ankle and hindfoot deformities (3 patients) and a forefoot 6×6 butt frame (7 patients) for midfoot deformities. An osteotomy through midfoot was performed in all chronic stable midfoot deformity cases and a calcaneal osteotomy and gradual correction through ankle in when hindfoot and ankle deformities co-existed.Introduction
Materials and Methods
Patients undergoing complex limb reconstruction are often under immense physical, psychological and financial stress. We already provide psychological support within our unit. We have identified that patients struggle to obtain proper advice on the financial support to which they are entitled. In September 2019, In total 19 patients (68% male) have been seen. There have been 58 clinic appointments which have been a combination of face to face and virtual. The majority (80%) of issues dealt with relate to benefits – including claiming tax credits, universal credits and Personal Independence Payments. Other issues include housing problems, employment and claiming for travel and transport.Introduction
Materials and Methods
Congenital talipes equinovarus (CTEV) is a complex three-dimensional deformity with an incidence of 1–3 per 1000 live births. The Ponseti method is widely accepted and practiced, giving reliably good long-term results. There are a number of studies showing the benefits of a physiotherapy led Ponseti service with outcomes similar to a consultant led service. We present the first prospective randomised series comparing a physiotherapy led Ponseti service with a standard orthopaedic surgeon led series. 16 infants with bilateral CTEV were randomised into two groups. Each infant had one foot treated by a physiotherapist and the other foot treated by an orthopaedic surgeon using the Ponseti technique. Both groups had a premanipulation Pirani score of 5.5. All patients were followed up for a minimum of 12 months and the results demonstrated no significant difference in the post-treatment Pirani scores (p=0.77) and no significant difference in the success rate the Ponseti technique (p=1.00). This study is the first of its kind and demonstrates the value of a physiotherapy led Ponseti service in the management of CTEV. Although overall supervision by a paediatric orthopaedic surgeon is still necessary, this service will allow the surgeon to spend more time dealing with more complex problems.
To use a simple way of manipulating Taylor Spatial Frame to achieve soft tissue closure by acute intentional deformation and then gradually achieving anatomical alignment of the fracture without complex deformity and frame parameters. 10 consecutive cases of Gustillo III B open fractures of tibia and of soft tissue defect due to infected implant were treated with a new technique of acute intentional deformation using Taylor Spatial frame to successfully close the soft tissue defect without plastic surgery. We describe a new simple technique of achieving anatomical alignment of the fracture after creating complex deformity to close the soft tissue defect. We achieved complete full thickness cover of the exposed bone in all cases without plastic surgery and restored the bone to anatomical alignment. Only one patient needed additional Taylor Spatial Frame total residual prescription to correct minor residual deformity.Purpose of the study
Methods and end results
We conducted a study to assess the accuracy of Spatial CAD software in computing the mounting and deformity parameters. We mounted a two-ring construct on a sawbone tibia and accurately measured the mounting parameters of this frame. Then we obtained three sets of x-rays – orthogonal without magnification marker, orthogonal with magnification marker placed at the level of the bone and non orthogonal views – and put these images through software and obtained mounting and deformity parameters. Results were independently assessed and we found that the Spatial CAD™ software was accurate within 1 mm and 1 degree when orthogonal images with marker sphere placed at the bone level were used. Non-orthogonal images, with marker sphere, yielded accurate axial frame offset but other mounting parameters were at least 6 mm more than the actual measurements. Understandably angular measurements were different. In the third set of films we used frame hardware – Rancho Cube width (12 mm) as a calibrator. Since the cube was not in the same plane as the bone all measurements were way off actual measurements.Purpose of the study
Methods and end results
To use a simple way of manipulating Taylor Spatial Frame to achieve soft tissue closure by acute intentional deformation and then gradually achieving anatomical alignment of the fracture without complex deformity and frame parameters. 10 consecutive cases of Gustillo III B open fractures of tibia and of soft tissue defect due to infected implant were treated with a new technique of acute intentional deformation using Taylor Spatial frame to successfully close the soft tissue defect without plastic surgery. We describe a new simple technique of achieving anatomical alignment of the fracture after creating complex deformity to close the soft tissue defect. We achieved complete full thickness cover of the exposed bone in all cases without plastic surgery and restored the bone to anatomical alignment. Only one patient needed additional Taylor Spatial Frame total residual prescription to correct minor residual deformity.Purpose of the study
Methods and end results
To assess use of Taylor Spatial Frame to correct posttraumatic equinus contracture of ankle by soft tissue distraction. Description of a successful technique. We have treated five cases of severe and resistant equinus contracture (20–30 degrees) between 2005 and 2010. All cases resulted from severe soft tissue injury and compartment syndrome of affected limb. They had undergone prolonged treatment for open fracture of tibia prior to referral to our institute and failed to respond to at least six months of aggressive physiotherapy. In all cases fractures did not involve ankle articular surface and all tibial fractures had united. Three out five cases also had associated peroneal nerve palsy. Our procedure included Tendo Achilles Lengthening, ankle and subtalar capsulotomy and application of two-ring Taylor Spatial Frame. We used long bone module to correct the deformity gradually. All deformities were over corrected by 5–10% to prevent recurrence. We successfully corrected equinus deformity in all cases. Follow up ranged from three months to five years and we found no recurrence. Patients with peroneal palsy were provided with Ankle Foot Orthosis (AFO).Purpose of the study
Methods and end results
We describe a new surgical approach designed for use with minimally invasive fixation and a circular frame. Tibial pilon injuries are often associated with significant soft tissue injury, which may not be evident at the time of injury. In such cases standard surgical approaches can lead to problems with wound healing, thus increase the risk of deep infection. AO Type C valgus fractures are commonly associated with fibula fractures. We found that the anterior syndesmotic ligaments are often disrupted with sparing of the lateral soft tissue envelope. Our technique utilizes a direct lateral approach to expose the lateral malleolus/distal fibula, which is reflected postero-laterally through the fracture and intact posterior syndesmotic ligaments. This creates a direct view of posterolateral and anterolateral comminution and talar dome allowing direct fixation of fragments with minimal internal fixation. Fibula fixation is performed with a 1/3rd tubular plate and the anterior syndesmotic ligaments are repaired. From 2007–2009, we used this approach in 12 patients (Male 9: Female 3; age 19–42) with AO Type C3 fractures with significant soft tissue injury (open = 2/ closed = 10; Tscherne Grade 1 = 4; Grade 2 = 8). We used circular frame stabilization in all cases (in four patients an additional foot frame was applied to protect the articular surface). All fractures united in satisfactory alignment. Wound healed well in all cases. One case of gouty arthritis developed superficial infection, which went on to heal after wound wash out and oral antibiotic therapy. Follow-up (minimum 3 months and maximum 2 years) showed no ankle instability. Clinical evaluation revealed a mean dorsiflexion of 10° (5–15°) and mean plantar flexion of 35° (15–60°). We conclude that transfibular approach gives good exposure of lower tibial articular surface in selected cases of pilon fractures with least soft tissue disruption.
Taylor Spatial Frame (TSF) is a six axis deformity correction frame and accuracy of correction depend on the accuracy of parameters input in to the web based software. There are various methods of obtaining frame and deformity parameters (13 in total) including the use of dedicated software known as SpatialCAD™. We tested the accuracy of SpatialCAD™ using a saw bone two ring frame construct of known parameters. We mounted a two-ring (155mm) frame on a saw bone tibia and fibula unit and worked out the accurate mounting and deformity parameters. Then we obtained orthogonal and nonorthogonal antero-posterior and lateral images of frame using a metallic sphere of known dimensions placed at the level of the bone, to aid calibration of x-ray images. We also obtained orthogonal and non-orthogonal images without a calibrating sphere. We then uploaded the images in to SpatialCAD™ software and obtained the mounting and deformity parameters and compared with the real parameters. SpatialCAD™ is capable of yielding measurements within 1–2mm of actual measurements when Calibrated orthogonal images were used. The software was inaccurate when frame hardware of known dimensions was used for calibration because the hardware was not in the same plane as the bone
Fracture non-union poses a significant challenge to treating orthopaedic surgeons. These patients often require multiple surgical procedures. The incidence of complications after Autologous Bone Graft (ABG) harvesting has been reported up to 44%. These complications include persistent severe donor site pain, infection, heterotopic ossification and antalgic gait. We retrospectively compared the use of BMP-7 alone in long bone fracture Non-union, with patients in whom BMP-7 was used in combination with the Autologous Bone Graft (ABG). The databases of our dedicated Limb Reconstruction Unit were searched for patient with three common long bone fractures Non-unions (Tibia, Femur and Humerus). The patients who had intra-operative use of Bone Morphogenetic Protein (BMP-7) alone and in combination with ABG were evaluated. 53 Patients had combined use of ABG and BMP-7, and 65 patients had BMP-7 alone.Objectives
Material and Methods
We present a series of 11 patients with infected tibial intramedullary nails which were treated at our tertiary referral centre from January 2000 to November 2009. All of them were males and the mean age was 36 years (26 to 47 years). All the patients had sustained post traumatic fractures which were treated with intramedullary nail. Four patients (36%) had sustained open fractures in whom adequate soft tissue cover was provided by plastic surgeons. Five of them (45%) were smokers. All of them underwent surgical debridement. Nine out of 11 patients had removal of metal work followed by one or more of the following procedures such as reaming, exchange nailing, excision of sequestrum, application of antibiotic beads and stabilisation with a frame with or without several bone grafts at a later date. Out of 11 patients six (55%) had no further episodes of infection, three (27%) still need short courses of antibiotics when the disease flares up and two (18%) underwent amputation. Causative organisms were isolated in all the patients. Commonest organism was MRSA. Overall, most of the organisms were sensitive to Vancomycin and resistant to Penicillin. Despite exploring most of the surgical procedures described for infected tibial intramedullary nails we have potentially eradicated infection only in about half of our patients. Hence we would like to emphasise that this condition still remains a serious problem and demands further insight in its management
Blount's disease is by far common cause of significant genu varum in paediatric age group. The deformity can range from simple varus deformity to significant varus, shortening of tibia and internal torsion of tibia, depending up on type and stage of Blount's disease. Several studies have shown excellent correction with the use of circular frame. The trend has moved from Ilizarov circular frame to Taylor Spatial Frame. The most accepted method of achieving correction of all components is by performing proximal tibial osteotomy and gradual correction of mechanical axis. Traditionally two additional procedures – fibular osteotomy and fixation of distal tibio-fibular syndesmosis are also added. However, the role of these additional procedures, which are not without their complications, is not well evaluated. A recent study had shown that correction of tibia vara without lengthening can be achieved without fibular osteotomy. However, use of distal tibio-fibular syndesmosis fixation (either with a wire or a screw) remains controversial. We present our experience in treating Blount's deformity with circular frame without stabilization of distal tibio-fibular syndesmosis. 10 patients were treated at our tertiary referral centre between 2000 to 2010. There were 7 boys and 3 girls. Age at surgery ranged from 8 yrs – 15 yrs. The mean patient age was 11.5 yrs. Two patients were treated with Ilizarov frame and 8 with Taylor Spatial Frame. Indications for surgery were unacceptable deformity (varus and internal rotation), with or without shortening. Varus deformity ranged from 10 degrees to 40 degrees. All tibiae were lengthened and the range of lengthening was from 1cm to 3.5cm. Fibular osteotomy was carried out in all patients. Tibio-fibular syndesmosis was never stabilized distally. All the patients were encouraged to mobilise full weight bearing as soon as tolerated and all of them had gradual correction of deformity usually starting a week following the surgery. We achieved target correction of varus, internal rotation and leg length discrepancy in all patients. The commonest hurdle was superficial pin tract infection which resolved with short courses of oral antibiotics. Follow up ranged from 6 months to 10 yrs. Clinical and radiological evaluation of ankle did not show any abnormality in all these cases. Satisfactory correction of Blount's disease (tibia vara and leg length discrepancy) can be achieved with circular frame without the stabilization of distal tibio-fibular syndesmosis.
Human recombinant Osteogenic Protein 1 or rhBMP-7 is licensed for use in tibial non-union where autologous bone grafting has failed. Through its osteoconductive and osteoinductive properties, its application may be more widely applied. We audited our use of rhBMP-7 and present the largest series currently reported in the literature. We reviewed 107 consecutive patients on whom rhBMP-7 was used over a 5-year period (2002–2007). Demographic and clinical details (e.g indication, site, use of adjuncts, previous surgery, smoking status, time to union, mean follow up etc) were entered into an electronic spreadsheet. RhBMP-7 was used in 112 sites on 107 patients (65 male, 42 female). Ages ranged from 16yrs to 89yrs (mean 47.6). Non-union was the main indication for surgery (82 cases). RhBMP-7 was used alone in 39 cases and with autologous bone graft (56 cases). In other cases demineralised bone matrix, USS and bone allograft were used as adjuncts. Tibia (42 cases), femur (29 cases), humerus (21 cases) were the most common sites of administration. Mean number of operations prior to use of rhBMP-7 was 1.6 (range 1–20). In all cases, union was achieved in 65% (73/112) with a mean union time 5.8 months. The ‘rhBMP-7 alone’ subgroup demonstrated union in 83% (30/36), mean union time 5.15 months. 68% (56/82) of cases treated for nonunion subsequently united with rhBMP-7. Our results suggest rhBMP-7 is useful in the management of fracture non-union and limb reconstruction surgery irrespective of site. It promotes bone healing of non-unions subjected to multiple operations previously. It may be indicated in those patients in whom autologous bone graft harvest is undesirable or not possible or as an adjunct to bone grafting. Moreover we did not detect any adverse reactions specific to the administration of rhBMP-7.
The movement of a normal knee is a complex of flex-ion-extension, translation and rotational movements. Intracapsular anatomical structures such as ACL, PCL, menisci, the bone anatomy as well as the muscles acting on the knee joint influence the screw home mechanism. We assessed the axial rotation of the tibia during knee flexion in order to better understand the kinematic behavior of osteoarthritic knees. We included 55 consecutive admissions (31 females and 24 males) with diagnosed osteoarthritis of the knee. All records were obtained by consultant orthopaedic surgeons using the trackers and software of a navigation knee replacement system, prior to a knee replacement surgery. All the records were obtained before any soft tissue release. For the statistical analysis we used the Wilcoxon non parametric two sample test. We found that the tibial rotation on knee flexion followed three distinct patterns: a) normal rotation: 26 knees (47%) with average rotation of 15.96° (range: 0.5°–34°). b) mixed internal and external rotation: 22 knees (40%) with average rotation 6.7° (range: 5°–0.5°) and c) reversed rotation: seven knees (13%) with average external rotation of 2.7° (range:1°–4°). Most of the tibial rotation occurs in the first 0–30° of flexion (70%) p<
0.001. Our study confirms that osteoarthritis affects the normal kinematics of the knee joint and also suggests that the observed kinematics follow distinctive patterns.
We studied the change in the axial rotation of the tibia at different levels of knee flexion after Knee Replacement using navigation systems. We reviewed the knee kinematic data of 36 consecutive patients (15 males and 21 females) who underwent elective knee replacement (Scorpio/Stryker) at King’s College Hospital. All data were generated using the navigation TKR trackers and software of a knee replacement system. All preoperative data obtained before any soft tissue release. We studied the tibial rotation at 30°, 60° and 90° of knee flexion. All operations were performed by consultant orthopaedic surgeons. We used the Wilcoxon non parametric two sample test for statistical analysis. The average tibial internal rotation upon knee flexion was 9.4° preoperatively and was reduced to 5.3° (mean 7.3°) post operatively. Most of the change (80%) occurred within the first 30° of flexion (p<
0.001). Postoperatively 38% of the studied knees had the screw home mechanism preserved. 52.7% had a mixed pattern of both internal and external rotation of the tibia and three knees (8%) had a reversed rotation of the tibia. The abnormal screw home pattern was preserved in 16 of the postoperative joints (46%). One knee was found postoperatively with external tibial rotation in all flexion increments. The abnormal pattern of tibial rotation was not improved following a navigation arthroplasty. We found that computer navigated TKR reduces significantly the tibial rotation and the replaced knee joint does not behave as a hinge joint. Pre-existing abnormal tibial rotation patterns were not improved postoperatively.
