The aim is to investigate if there is a relation between patellar height and knee flexion angle. For this purpose we retrospectively evaluated the radiographs of 500 knees presented for a variety of reasons. We measure knee flexion angle using a computer-generated goniometer. Patellar height was determined using computer generated measurement for the selected ratios, namely, the Insall–Salvati (I/S), Caton–Deschamps (C/D) and Blackburne–Peel (B/P) indices and Modified I/S Ratio. A search of an NHS hospital database was made to identify the knee
Background. An improved understanding of intervertebral disc (IVD) structure and function is required for treatment development. Loading induces micro-fractures at the interface between the nucleus pulposus (NP) and the annulus fibrosus (AF), which is hypothesized to induce a cascade of cellular changes leading to degeneration. However, there is limited understanding of the structural relationship between the NP and AF at this interface and particularly response to load. Here, X-ray scattering is utilised to provide hierarchical morphometric information of collagen structure across the IVD, especially the interface region under load. Methodology. IVDs were imaged using the I22 SAXS/WAXS beamline at Diamond Light Source. Peaks associated with the D-banded structure of collagen fibrils were fitted to quantify their azimuthal distribution, as well the magnitude and direction of internal strains under static and applied strain (0–20%). Results. IVD tissue regions exhibited structural “AF-like” and “NP-like” fingerprints. Demonstrating high internal strains on collagen fibres particularly within the NP region of the disc. AF and NP regions showed distinct collagen orientation and internal strains with an apparent lack of bracing structure seen at the interface between the differential mechanical tissues. X-ray scattering under tensile strain provided structural information at high resolution, with clear differences observed between normal and degenerate discs under load. Conclusion.
Introduction and Objective. Malunion after trauma can lead to coronal plane malalignment in the lower limb. The mechanical hypothesis suggests that this alters the load distribution in the knee joint and that that this increased load may predispose to compartmental arthritis. This is generally accepted in the orthopaedic community and serves as the basis guiding deformity correction after malunion as well as congenital or insidious onset malalignment. Much of the literature surrounding the contribution of lower limb alignment to arthritis comes from cohort studies of incident osteoarthritis. There has been a causation dilemma perpetuated in a number of studies - suggesting malalignment does not contribute to, but is instead a consequence of, compartmental arthritis. In this investigation the relationship between compartmental (medial or lateral) arthritis and coronal plane malalignment (varus or valgus) in patients with post traumatic unilateral limb deformity was examined. This represents a specific niche cohort of patients in which worsened compartmental knee arthritis after extra-articular injury must rationally be attributed to malalignment. Materials and Methods. The picture archiving system was searched to identify all 1160 long leg
Neck of femur fractures are a common presentation and certain patients can be managed with a total hip replacement. To receive a total hip replacement the pelvic X-rays should be templated as per AO guidelines and a common way this is performed is by including a calibration marker on the X-ray. The aim of this study is to assess and improve upon the use of the calibration marker. Details of patients admitted with a neck of femur fracture from January 1st 2018 until December 31st 2018 were gathered and used to review each initial X-ray and determine if a calibration marker was included. 376 patients were admitted with a neck of femur fracture over the one year period. 36% of patients did not have a calibration marker on their initial pelvic X-ray and 11% did not have a chest X ray. 215 patients had an intracapsular fracture and 39 went on to have a total hip replacement. 12 patients were lacking a calibration marker on their original
Our aim was to evaluate the indications for patients undergoing magnetic resonance imaging (MRI) of the knee prior to referral to an orthopaedic specialist, and ascertain whether these scans altered initial management. We retrospectively reviewed all referrals received by a single specialist knee surgeon over a 1-year period. Patient demographics, relevant history, examination findings and past surgical procedures were documented. Patients having undergone MRI prior to referral were identified and indications for the scans recorded. These were reviewed against The NHS guidelines for Primary Care Physicians to identify if the imaging performed was appropriate in each case.Aims and objectives
Materials and Method
Objectives. Total hip arthroplasty (THA) is one of the most successful surgical procedures; several bearing technologies have been used, however none of these is optimal. Metal on polycarbonate-urethane (PCU) is a new bearing technology with several potential advantages: PCU is a hydrophilic soft pliable implant quite similar in elasticity to human cartilage, offers biostability, high resistance to hydrolysis, oxidation, and calcification, no biodegradation, low wear rate and high corrosion resistance and can be coupled with large metal heads (Tribofit Hip System, THS). The aim of this prospective study was to report the survivorship and the clinical and radiographic outcomes and the metal ions dosage of a group of patients operated with metal on PCU arthroplasty featuring large metal diameter heads, at 5 years from surgery. Study Design & Methods. 68 consecutive patients treated with the THS were included. The patients have been contacted by phone call and invited to return to our centre for clinical (Oxford Hip Score, OHS, and Harris Hip Score, HHS), radiographic exam and metal ion levels evaluation. All the patients were operated with uncemented stems. Results. The survival rate is 100% and no major complications were seen. The average preoperative OHS was 17 (6–34), at follow-up it was 44 (40–48). The average preoperative HHS was 48 (12–76), at follow-up it was 93 (84–100). On the
Introduction. Literature describes pelvic rotation on lateral
Stems are a crucial part of implant stabilization in revision total knee arthroplasty. In most cases the metaphyseal bone is deficient, and stabilization in the diaphyseal cortical bone is necessary to keep the implant tightly fixed to bone and to prevent tilt and micromotion. While sleeves and cones can be effective in revision total joint arthroplasty, they are technically difficult and may lead to major bone loss in cases of loosening or infection, especially if the stem is cemented past the cone. A much more conservative method is to ream the diaphysis to the least depth possible to achieve tight circumferential fixation, and to apply porous augments to the undersurface of the tibial tray or inner surface of the femoral component to allow them to bottom out against the bone surface and apply compressive load. If a robust, strong taper, stem and component combination is used, rim contact on only one side is necessary to achieve rigid permanent fixation. Porous and non-porous stems are available. The non-porous stems should have a spline surface that engages the diaphyseal bone and achieves rigid initial fixation but does not provide long-term axillary support. In that way the porous rim-engaging surface can bear compressive load and finally unload the stem and taper junction. Correctly designed stems do not stress relieve unless they are porous-coated. In situations where metaphyseal bone is not available, porous-coated stems that link to hinge prostheses are a very important part of the armamentarium in complex revision arthroplasty. Use of stems requires experience and special technique. Slight underreaming and initial scratch fit are necessary techniques. This does not result in tight fixation every time because split of the cortex does occasionally occur. In most cases these splits do not need to be repaired, but when there is a question, an intra-operative
Amniotic membrane (AM) and amnion/chorion foetal membranes (ACM) are mainly composed of collagen & laminin layers and constitute relatively new materials to the dental market. They have proven effective for periodontal treatments such as Guided Tissue Regeneration (GTR) [1–3]. Based on our expertise in the field of lyophilisation & securisation of human bone allograft (Phoenix® process), we aimed to develop our own process applied to ACM and to control its in vivoefficacy in GTR indication. Human placentas were donated under informed consent. ACM were separated from placenta and processed with a proprietary AMTRIX (TBF) Process. Resulting product was called ACMTRIX. The effectiveness of ACMTRIX in GTR was evaluated using an in vivorat calvaria defect model as followed:. Empty defect (2 animals),. ACMTRIX apposed onto the defect (4 animals),. 3 Bone substitutes (allogenic – mineralized cortical bone powder (Phoenix®); demineralized cancellous bone powder mixed with hydroxyapatite and demineralized bone matrix (DBM) cancellous block) filled in the defect and covered by ACMTRIX (4 animals). One animal per study group was sacrificed after 8 weeks, all others after 8 weeks. Evaluations were performed by: macroscopic observations,
Introduction. Ankle fractures are common injuries presenting to trauma departments and ankle open reduction and internal fixation (ORIF) is one of the first procedures targeted in early orthopaedic training. Failure to address the fracture pattern with the appropriate surgical technique and hardware may lead to early failure resulting in revision procedures or premature degenerative change. Patients undergoing revision ORIF are known to be at much greater risk of complications, and many of these secondary procedures may be preventable. Method. A retrospective analysis of all patients attending our unit for ankle ORIF over a two year period was undertaken. Patients were identified from our Bluespier database and a review of
Despite the high success rates of Reverse Shoulder replacements, complications of instability & scapular notching are a concern. Factors reducing relative motion of implant to underlying bone which include lateral offset to centre of rotation, screw & central peg insertion angle and early osteo-integration are maximized in the Trabecular Metal Reverse total shoulder system. We present clinico-radiological outcomes over 72 months. Analysis of a single surgeon series of 140 Reverse total shoulder replacements in 135 patients was done. Mean age was 72(range 58– 87 yrs); 81 females: 54 males. Indications were Rotator cuff arthropathy {n= 88} (63%); Osteo-arthritis with dysfunctional cuff {n= 22}(15%); post-trauma{n=23} (15%); revision from hemiarthroplasty {n=3} (2.4%) and from surface replacement {n=4} (2.8%). All patients were assessed using pre-operative Constants and Oxford scores and clinical & radiographic reviews with standard X-Rays at 6 weeks, 3, 6,12 months and yearly thereafter.
Introduction. One of the important criteria of the success of TKR is achievement of the Flexion ROM. Various factors responsible to achieve flexion are technique, Implant and patient related. Creation of the Posterior condylar offset is one such important factor to achieve satisfactory flexion. Aim. To correlate post op femoral condylar offset to final flexion ROM at 1 yr. post op. Methods. This is a clinico-radiological study of the cases done prospectively between September 2011 and August 2012. Inclusion criteria:. All patients undergoing Bilateral TKRs and have agreed for the follow up at 1 yr. Exclusion criteria:. Patients who had previous bony surgery on lower end femur. Patients with previous fracture of lower end femur. All the patients had PS PFC Sigma (De Puy, Warsaw) components cemented. ROMs were measured at 6 weeks, 3 months, & 1 year post op. The last reading was taken as final flexion ROM as measured by a Physiotherapist with the help of a Goniometer. Results. We had 21 cases of Bilateral TKRs who satisfied our criteria. Pre and post op femoral condylar offset was measured in mm. on lateral
Hypothesis. The use of cartilage compensated virtual standing CT images for pre surgical planning improves the reliability of preoperative planning. Materials and Method. Sampling included in this study were > 62 years of age (mean age 58.17 yrs ±3.54 yrs, range 55–62) with symptomatic isolated medial osteoarthritis, genu varum (mean varus 5.6°±2.6 °, range 2.1°–8.6°), good range of motion (flexion > 90° and flexion contracture < 10°) and with minimal ligamentous instability. All subjects had obtained a pre-op CT scan, MRI scan and weight-bearing long bone
Introduction. Magnetic resonance arthrogram (MRA) is the investigation of choice in young adults with symptoms of femero acetabular impingement. The aim of the study is to assess the accuracy of MRA when correlated with surgical findings on hip arthroscopy. Materials and Method. Between June 2007 and January 2014, 136 patients had MRA followed by subsequent arthroscopy at our institution. The radiology information system was used to gather MRA data. All scans were reported by a consultant radiologist with a specialist interest in musculoskeletal radiology. Patient records were reviewed to gather surgical data. Assessment was made of labral injury, Camshaft (CAM) or Pincer lesion and degeneration of the cartilage. Results. Mean age at MRA was 34.5 years with a 2.5:1 female to male ratio. For labral pathology sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were 89, 100, 100 and 22% respectively. For CAM (62, 80, 79 and 64% respectively) and Pincer lesions (15, 84, 81 and 18% respectively). MRA was specific for picking up Grade 3/4 degenerate changes in the articular cartilage (92.2%) but was not as sensitive (60%), PPV 55 and NPV 94. Conclusion. These findings demonstrate that MRA is a sensitive and specific imaging modality for assessing the labrum and articular surface, but not as good for assessing CAM and Pincer lesions. This could be due to the static nature of the MRA or a lack of firm definition as to what constitutes a CAM or Pincer lesion leading to under reporting. This maybe better assessed with plane
The lack of a universal, consistent protocol for the subjective, objective and radiographic evaluation of these injuries has hampered the comparison of results. Methods. 45 patients with complex fractures of the calcaneus were included in this prospective study, which was undertaken from July 2003 to December 2005. The fracture classification of Essex-Lopresti was used. We also observed the extent of secondary fracture lines extending from the primary shear line (on axial and external oblique plain radiographs) to establish comminution. The external oblique view for subtalar joint was performed with the patient supine, the knee at about 60 degree of flexion and the limb rotated externally 45 degree with a vertical
Summary. There is little consensus regarding the regime for treatment of tuberculosis of spine, although WHO has laid down guidelines couple of years back classifying spinal tuberculosis in Category 1. This study proves the efficacy of WHO regime in spinal tuberculosis by clinico-radiological evaluation. Introduction. The medical fraternity is divided over the duration of chemotherapy in cases spinal tuberculosis. WHO clearly recommend spinal tuberculosis under Category I, but not accepted by most clinicians. Patient and Methods. In this prospective study during the period between August 2005 and July 2012, a total of 76 cases were diagnosed and evaluated clinico-radiologically to test the efficacy of WHO protocol (2HRZE+4HR) in our hospital with a mean follow up of 50 months (30 – 80 months). Results. Spinal tuberculosis was seen in 56% of all osteoarticular tuberculosis. Maximum population was between 11–50 years, females were involved more than males (66%), and regional distribution was different in males (Lumbar) and females (Thoracic). Skip and multifocal lesions were seen in 13% (6 cases), more common in immune compromised cases. Pain was the most common symptom (95%) followed by constitutional symptoms. Radiographic changes were nonspecific, appear late and suggestive of tuberculosis in 53%case, MRI is very useful in diagnosing in 95% cases especially when
Introduction. Stem cells have the capacity for self renewal and capability of differentiation into various cell lineages. Non union remains a clinically important problem in orthopaedic surgery. Method. We randomly assigned 45 patients into 3 groups. Test group: 15 patients in which mesenchymal stem cells prepared by conventional density-gradient centrifugation using ficoll-hypaque solution were injected (n=15), control A: 15 patients in which autogenous bone marrow aspirate were injected (n=15), control B: 15 patients in which neither the stem cell nor bone marrow injection given, symptomatically treated(n=15). Ultra sound and
Introduction:. One of the important criteria of the success of TKR is achievement of the Flexion ROM. Various factors responsible to achieve flexion are technique, Implant and patient related. Creation of the Posterior condylar offset is one of the important factors to achieve satisfactory flexion. Aim:. To correlate post op femoral condylar offset to final flexion ROM at 1 yr. post op. Methods:. This is a clinico-radiological study of the cases done prospectively between September 2011 and August 2012. Inclusion criteria:. All patients undergoing Bilateral TKRs and have agreed for the follow up at 1 yr. Exclusion criteria:
. 1). Patients who had previous bony surgery on lower end femur. 2). Patients with previous fracture of lower end femur. All the patients had PS PFC Sigma (De Puy, Warsaw) components cemented. ROMs were measured at 6 weeks, 3 months, & 1 year post op. The last reading was taken as final flexion ROM as measured by an independent Physiotherapist with the help of a Goniometer. Results:. We had 21 cases of Bilateral TKRs who satisfied our criteria. Pre and post op femoral condylar offset was measured in mm. on lateral
Introduction. Proper femoral reaming is a key factor for a successful outcome in cementless hip arthroplasty. Good quality reaming minimizes risks of intra-operative femoral fracture during reaming and prevents poor fitting of the implant which can lead to subsidance of the stem postoperativly. Determining the quality of reaming is largely a subjective skill and dependant on the surgeon's experience with no documented intraoprative method to assess it objectively. Method. We recorded and analysed the frequencies of sound signals recorded via a bone conduction microphone during reaming of the femoral canal in a series of 28 consecutive patients undergoing uncemented total hip replacement performed by same surgeon. Hammaring sound frequencies and intensity were analysed by mean of computer software. The relationship between the patterns of the recorded reaming sound frequencies compared with surgeon judgment of the reaming quality intraoparativly and post operative