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Orthop Traumatol Surg Res 2019 Apr 8. Epub 2019 Apr 8.

Service de chirurgie orthopédique infantile, centre hospitalier universitaire de Toulouse, 31000 Toulouse, France.

Background: Intra-medullary osteosclerosis of the tibia is a rare condition characterised by chronic pain due to diaphyseal hyperostosis with no detectable triggering factor. The main differential diagnoses are stress fracture and osteoid osteoma. Of the few cases reported to date, most were in adults. Read More

J Endovasc Ther 2019 Apr 11:1526602819842569. Epub 2019 Apr 11.

2 Department of Vascular Surgery, St Franziskus Hospital Münster, Germany.

Purpose: To evaluate the safety and integrity of a new stent-graft as a potential bridging device in fenestrated stent-grafts using an in vitro fenestrated model.

Materials And Methods: Polyester test sheets with ten 6-mm- or 8-mm-diameter fenestrations were used to simulate a fenestrated main body endoprosthesis. In total, 50 Viabahn balloon-expandable (VBX) stent-grafts of varying lengths (29 and 39 mm) and diameters (6, 7, and 8 mm) were implanted in the fitting fenestrations. Read More

Materials (Basel) 2019 Apr 9;12(7). Epub 2019 Apr 9.

Institute of Structural Analysis (ISD), Leibniz Universität Hannover, Appelstr. 9a, 30167 Hannover, Germany.

Microcrack formation and delamination growth are the main damage mechanisms in thefatigue of composites. They lead to significant stiffness loss, introduce stress concentrations andcan be the origin of subsequent damage events like buckling or fibre breakage, especially in case ofshear and compression stresses during load reversal. Fatigue experiments of carbon fibre reinforcedlaminates were conducted at several stress ratios and analysed in terms of crack and delaminationgrowth. Read More

BMC Musculoskelet Disord 2019 Apr 9;20(1):150. Epub 2019 Apr 9.

Department of Radiology, Hospital do Coração (HCor) and Teleimagem, Rua Desembargador Eliseu Guilherme, 53, 7th floor, São Paulo, SP, CEP 04004-030, Brazil.

Background: Humeral stress fractures are rare injuries usually related to sports practice and joint overload without a direct trauma. A proximal humeral stress fracture has never been reported in a CrossFit athlete.

Case Presentation: We report a stress fracture in the humerus of a 22-year-old woman after intense CrossFit training. Read More

Clin Biomech (Bristol, Avon) 2019 Mar 20;65:13-18. Epub 2019 Mar 20.

Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

Background: Since bone mass is not the only determinant of bone strength, there has been increasing interest in incorporating the bone quality into fracture risk assessments. We aimed to examine whether the magnetic resonance imaging (MRI) T1 or T2 mapping value could provide information that is complementary to bone mineral density for more accurate prediction of cancellous bone strength.

Methods: Four postmenopausal women with hip osteoarthritis underwent 3. Read More

Clin Imaging 2019 Mar 19;56:58-62. Epub 2019 Mar 19.

Radiology, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland; University of Zurich, Faculty of Medicine, Zurich, Switzerland.

Purpose: To compare changes in the pubic symphysis between women with vaginal delivery and women with caesarean sections within the first postpartum week.

Materials And Methods: After institutional review board approval 30 healthy women were prospectively examined with MRI (transverse STIR-sequence) three days after delivery. 17 women with vaginal delivery (mean age 33. Read More

Materials (Basel) 2019 Mar 21;12(6). Epub 2019 Mar 21.

Applied Optics Group, School of Physics, University of Kent, Canterbury CT2 7NR, UK.

Dental prostheses are sintered in ovens that sometimes suffer from a loss of calibration. This can lead to variations of the sintering temperature outside the range recommended by the manufacturer. Stress and even fractures in dental ceramics may occur, and this leads to the necessity to rebuild the dental construct. Read More

Cureus 2019 Jan 10;11(1):e3861. Epub 2019 Jan 10.

Neurological Surgery, University of Miami Hospital, Miami, USA.

Iliac wing fractures are under-diagnosed fractures often associated with sacral insufficiency fractures in osteoporotic patients. They are rarely seen alone. Insufficiency fractures of the iliac bone can often be missed on computerized tomography (CT) and magnetic resonance imaging (MRI) yet identified on radioisotope bone scans. Read More

J Cardiothorac Surg 2019 Mar 12;14(1):53. Epub 2019 Mar 12.

Metamaterials Unit, Faculty of Science, University of Malta, Msida, Malta.

This letter re-assesses a publication in the Journal of Cardiothoracic Surgery entitled 'Vibration transmittance measures sternotomy stability - a preliminary study in human cadavers.' The roles of ultrasound in testing for sternotomy stability and that of stress vibration transmittance in cases of fracture of the posterior table of the sternum or in hairline undisplaced fractures are examined in view of their differing sound wave frequency ranges. Read More

Acta Biochim Pol 2019 Mar;66(1):71-76

Department of Orthopaedics, Hanzhong People's Hospital, Hantai District, Hanzhong City, Shaanxi Province, 723000, China.

Bone fracture, being mainly caused by mechanical stress, requires special and quick attention for a rapid healing. The study presented here aims at formulating nanoparticulate system to overcome the solubility issues of lovastatin. The lovastatin nanoparticles were successfully prepared by ionotropic gelation method using chitosan and tri-polyphosphate as polymers. Read More

Med Biol Eng Comput 2019 Mar 4. Epub 2019 Mar 4.

Laboratoire de Biomécanique Appliquée, IFSTTAR, LBA UMR T24, Aix-Marseille Université, Boulevard Pierre Dramard, Marseille Cedex, France.

Traumatic events may lead to lumbar spine injuries ranging from low severity bony fracture to complex fracture dislocation. Injury pathomechanisms as well as the influence of loading rate and ligament mechanical properties were not yet fully elucidated. The objective was to quantify the influence of impact velocity and ligament properties variability on the lumbar spine response in traumatic flexion-shear conditions. Read More

J Vet Med Sci 2019 Apr 4;81(4):593-597. Epub 2019 Mar 4.

Laboratory of Veterinary Radiology, School of Veterinary Medicine, Azabu University, Kanagawa 252-5201, Japan.

This study focused on 8 Thoroughbred racehorses showing bone marrow oedema-type signal in the proximal sagittal groove of the proximal phalanx, with the aim of understanding its clinical significance. Standing magnetic resonance imaging played an important role in assessing osseous abnormalities that were not radiographically identifiable. Further, a histopathological result from one of the cases showed there was oedema surrounding adipose tissues with increase in density of trabecular scaffolding. Read More

Skeletal Radiol 2019 Feb 23. Epub 2019 Feb 23.

Department of Orthopaedics, Duke University Hospital, 2301 Erwin Road, Durham, NC, 27710, USA.

Glenohumeral osteoarthritis is a prevalent degenerative disease that can lead to excruciating pain and debility. End-stage osteoarthritis can be treated by both conservative and surgical interventions. Along with a comprehensive history and physical exam, pre-operative imaging with plain radiographs, computerized tomography, and magnetic resonance imaging plays an essential role in the decision-making process guiding whether the patient undergoes a shoulder hemiarthroplasty, anatomic total shoulder arthroplasty, or a reverse total shoulder arthroplasty. Read More

J Mech Behav Biomed Mater 2019 May 30;93:9-22. Epub 2019 Jan 30.

Department of Orthopaedics and Trauma Surgery, Campus Bio-Medico University of Rome, Italy.

This paper proposes a computational model based on a finite-element formulation for describing the mechanical behavior of femurs affected by metastatic lesions. A novel geometric/constitutive description is introduced by modelling healthy bone and metastases via a linearly poroelastic constitutive approach. A Gaussian-shaped graded transition of material properties between healthy and metastatic tissues is prescribed, in order to account for the bone-metastasis interaction. Read More

PM R 2019 Feb 6. Epub 2019 Feb 6.

Division, Physical Medicine & Rehabilitation, Departments of Neurology and Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri.

A sacral pedicle stress fracture is an uncommon source of low back pain in adolescent athletes. Given the extensive differential diagnosis of low back pain coupled with the fact that non- directed specific imaging can be normal, diagnosis can be delayed. We report the case of a 15- year-old African American male, dual-sport athlete who experienced low back pain from a sacral pedicle stress fracture. Read More

Medicine (Baltimore) 2019 Feb;98(5):e14311

Department of Orthopaedic Surgery, Soonchunhyang University Hospital Cheonan, 31, Suncheonhyang 6-gil, Dongam-gu, Cheonan, Korea.

Rationale: Stress fractures are most commonly sustained in the lower extremities owing to the repetitive weight-bearing forces. They are overuse injuries that are seen often in athletes, but rare in the general population, so early diagnosis and proper treatment are important to enable athletes to return to activity. This is a rare example of successful treatment of a medial malleolar stress fracture with lateral ankle instability. Read More

Radiologe 2019 Mar;59(3):204-211

Institut für Diagnostische und Interventionelle Radiologie, Kinder- und Neuroradiologie, Universitätsmedizin Rostock, Ernst Heydemann-Str. 6, 18057, Rostock, Deutschland.

Clinical/methodical Issue: In this article, suitable imaging of stress reactions and stress fractures in athletes will be examined.

Standard Radiological Methods: Diagnostic procedures include X‑ray, computed tomography (CT), magnetic resonance imaging (MRI), and bone scintigraphy.

Methodical Innovations: MRI represents the gold standard for these types of injuries. Read More

Eur Radiol Exp 2019 Jan 28;3(1). Epub 2019 Jan 28.

Department of Interventional Radiology, Nouvel Hôpital Civil (Hôpitaux Universitaires de Strasbourg, HUS), 1, place de l'Hôpital, 67000, Strasbourg, France.

Background: Osteoplasty has been discouraged in long bones. However, despite a substantial lack of pre-clinical biomechanical tests, multiple clinical studies have implemented a wide range of techniques to optimise long bone osteoplasty. The aim of the present study is to evaluate the biomechanical properties of osteoplasty alone and in combination with Kirschner wires (K-wires) in a cadaveric human diaphyseal model undergoing 3-point bending stress. Read More

J Orthop Case Rep 2018 Jul-Aug;8(4):45-48

Department of Orthopaedic Surgery, University of Tennessee College of Medicine Chattanooga, Erlanger Health System, United States.

Introduction: The overuse and repetitive loading of a bone cause a stress fracture, commonly occurring in the weight-bearing structures of the lower extremities of athletes, but rarely the patella. Patella stress fractures are an extremely rare occurrence. Müller first described a patella stress fracture in 1943; however, we could find <15 reported cases in literature since that time. Read More

Sci Rep 2019 Jan 22;9(1):305. Epub 2019 Jan 22.

Imaging-based Computational Biomedicine Laboratory, Nara Institute of Science and Technology, Ikoma, Japan.

Bone is in a continuous state of remodeling whereby old bone is absorbed and new bone is formed in its place. During this process, new formations reinforce the bone in the direction of the dominant stress trajectories through a functional adaptation. In normal aging, the balance between bone resorption and formation can be shifted. Read More

Bone Joint Res 2018 Dec 4;7(12):639-649. Epub 2019 Jan 4.

Department of Mechanical Engineering, University of Bath, Bath, UK.

Objectives: Opening wedge high tibial osteotomy (HTO) is an established surgical procedure for the treatment of early-stage knee arthritis. Other than infection, the majority of complications are related to mechanical factors - in particular, stimulation of healing at the osteotomy site. This study used finite element (FE) analysis to investigate the effect of plate design and bridging span on interfragmentary movement (IFM) and the influence of fracture healing on plate stress and potential failure. Read More

Pol J Radiol 2018 5;83:e471-e481. Epub 2018 Nov 5.

Department of Radiology, Gruca Orthopaedic and Trauma Teaching Hospital, Centre of Postgraduate Education, Otwock, Poland.

Purpose: To describe and illustrate the spectrum of magnetic resonance imaging (MRI) findings of tibial stress injuries (TSI) and propose a simplified classification system.

Material And Methods: Retrospective analysis of MRI exams of 44 patients with clinical suspicion of unilateral or bilateral TSI, using a modified classification system to evaluate the intensity and location of soft-tissue changes and bone changes.

Results: Most of the patients were young athletic men diagnosed in late stage of TSI. Read More

Exp Ther Med 2019 Jan 22;17(1):689-694. Epub 2018 Nov 22.

Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China.

Association of bone marrow adipose and microstructure with bone strength in osteoporotic rats using MR Dixon analysis and micro-CT was evaluated. A total of 40 female Sprague-Dawley rats (6-month-old) were divided randomly into sham-operated (SHAM, n=20) group and ovariectomized (OVX, n=20) group. Fat fraction (FF) was measured by two-point Dixon method with MR imaging at the baseline, 4th, 8th and 12th week, respectively. Read More

Am J Orthop (Belle Mead NJ) 2018 Dec;47(12)

Orthopaedic Surgery, Hackensack University Medical Center, 360 Essex Street, Suite 303, Hackensack, NJ 07601, USA. Email:

Stress fractures are often missed, especially in unusual clinical settings. We report on 2 patients who presented to our orthopedic surgery clinic with incidental findings of asymptomatic proximal fibular tension side stress fractures in severe longstanding varus osteoarthritic knees. Initial plain films demonstrated an expansile deformity of the proximal fibular shaft, and differential diagnosis included a healed or healing fracture versus possible neoplasm. Read More

Kathmandu Univ Med J (KUMJ) 2018 Jan.-Mar;16(61):28-34

Department of Orthopedics, B and C Teaching Hospital, Birtamod, Jhapa.

Background Ankle and foot pain is a common clinical problem, that may be due to a variety of soft tissue and osseus abnormalities. Magnetic resonance imaging plays vital role for diagnosing internal derangement of the ankle joint, assessing soft tissue structures around the ankle such as tendons, ligaments, nerves and osseus structures. Method Retrospective magnetic resonance imaging evaluation of the ankle and foot was done in 100 patients using 0. Read More

Bone 2019 Apr 3;121:89-99. Epub 2019 Jan 3.

BCN MedTech, Universitat Pompeu Fabra (UPF), Barcelona, Spain.

Osteoporotic bone fractures reduce quality of life and drastically increase mortality. Minimally irradiating imaging techniques such as dual-energy X-ray absorptiometry (DXA) allow assessment of bone loss through the use of bone mineral density (BMD) as descriptor. Yet, the accuracy of fracture risk predictions remains limited. Read More

Unfallchirurg 2019 Jan;122(1):6-16

Unfallchirurgische Abteilung, Landeskrankenhaus Horn, Spitalgasse 10, 3580, Horn, Österreich.

While fractures around the knee are known to be rare, physicians have encountered a rise in the frequency due to the increased participation of children and adolescents in high-impact sports at a younger age. Even if the treatment of fractures in some cases resembles that in adults, the diagnostics and treatment in childhood and adolescence require a hígh level of experience in order avoid possible sequelae and to enable early recognition. Thorough diagnostics using clinical and imaging investigations as well as a precise weighing up of the treatment are essential to minimize differences in leg length and axial malpositioning of the leg. Read More

J Orthop Sports Phys Ther 2019 Jan;49(1):37

A 22-year-old woman in Army Basic Combat Training was evaluated in a physical therapy clinic for insidious-onset groin pain. The referring primary care physician assistant ordered initial radiographs, which were noncontributory, followed by a bone scan that indicated a left inferior pubic ramus stress fracture. She was prescribed a 30-day convalescent leave. Read More

Knee 2019 Jan 19;26(1):174-184. Epub 2018 Dec 19.

Division of MSK Imaging, McMaster University, Hamilton, Ontario, Canada.

Background: CARGEL (Smith & Nephew Inc.), a chitosan-based polymer scaffolding biomaterial, has been used since 2012 for treating articular cartilage lesions. Limited data are available on patient outcomes following CARGEL treatment. Read More

J Orthop Surg Res 2018 Dec 13;13(1):318. Epub 2018 Dec 13.

Division of Bio-Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.

Background: Postmenopausal osteoporosis develops due to a deficiency of estrogen that causes a decrease in bone mass and changes in the macro- and micro-architectural structure of the bone, leading to the loss of mechanical strength and an increased risk of fracture. Although the assessment of bone mineral density (BMD) has been widely used as a gold standard for diagnostic screening of bone fracture risks, it accounts for only a part of the variation in bone fragility; thus, it is necessary to consider other determinants of bone strength. Therefore, we aimed to comprehensively evaluate the architectural changes of the bone that influence bone fracture strength, together with the different sensitivities of cortical and trabecular bone in response to ovariectomy (OVX). Read More

J Orthop Trauma 2019 Feb;33(2):88-91

University of South Florida, Tampa, FL.

Objectives: To report on the use of dynamic stress fluoroscopy (DSF) for detection of occult fractures of the femoral neck associated with femoral shaft fractures. To compare DSF with a fully static imaging protocol in detecting occult femoral neck fractures.

Design: Multicenter retrospective cohort study. Read More

Skeletal Radiol 2018 Nov 28. Epub 2018 Nov 28.

Department of Radiology, University of California San Diego, San Diego, CA, USA.

Stress fractures are a common diagnosis in sports medicine and can result in significant loss of function, athlete playing time, and potentially lead to chronic symptoms. However, unusual locations of stress fractures may present with vague symptoms and a relatively benign physical exam, leading to difficulty in arriving at the correct diagnosis. Pelvic stress fractures are less common than lower-extremity stress fractures in athletes, occurring in only 1-5% of all stress fractures and typically occur in pubic rami. Read More

Orthopedics 2019 Jan 28;42(1):e14-e24. Epub 2018 Nov 28.

Due to its high sensitivity, low cost, accessibility, and ease of use, bone scintigraphy is used in orthopedic surgery for the diagnosis and management of varied pathology. It is commonly used for insufficiency fractures, metastatic neoplasia, staging and surveillance of sarcoma, and nonaccidental trauma. It augments diagnoses, including stress or occult fractures, musculoskeletal neoplasia or infection, and chronic regional pain syndrome, in patients presenting with normal results on radiographs. Read More

J Orthop Surg Res 2018 Nov 27;13(1):300. Epub 2018 Nov 27.

Department of Orthopaedic Surgery Restorative Medicine of Neuro-Musculoskeletal System, Fujita Health University, Bantane Hospital, 3-6-10 Otoubashi, Nakagawa-ku, Nagoya, Aichi, 454-8509, Japan.

Background: Femoral trochanteric fractures are common among older adults. In the reduction of trochanteric fractures, acquiring the support of the anterior cortex at the fracture site on lateral view immediately after surgery is important. However, even if the cortical support is acquired, postoperative displacement due to the loss of this support often occurs. Read More

Orthop Clin North Am 2019 Jan;50(1):47-56

University of Tennessee-Campbell Clinic, Department of Orthopaedic Surgery and Biomedical Engineering, 1211 Union Avenue, Suite 500, Memphis, TN 38117, USA; Regional One Health, 877 Jefferson Avenue, Memphis, TN 38103, USA. Electronic address:

This article examines new imaging, diagnostic, and assessment techniques that may affect the care of patients with orthopedic trauma and/or infection. Three-dimensional imaging has assisted in fracture assessment preoperatively, whereas improvement in C-arm technology has allowed real-time evaluation of implant placement and periarticular reduction before leaving the operating room. Advances in imaging techniques have allowed earlier and more accurate diagnosis of nonunion and infection. Read More

Orthop Clin North Am 2019 Jan;50(1):131-138

Tehran University of Medical Science, Number 21, Dameshgh Street, Vali-e Asr Avenue, Tehran 1416753955, Iran.

Bone marrow edema syndrome is a rare and self-limited syndrome with an unknown cause. The natural time course for improvement of clinical symptoms and normalization in MRI lasts from 3 to 18 months. This entity must be distinguished from other causes of marrow abnormality, such as stress fractures and osteonecrosis, for the best treatment options. Read More

Orthop Nurs 2018 Nov/Dec;37(6):382-384

Patrick Graham, MSN, RN, ANP-BC, Advanced Practice Provider and Advanced Practice Nurse, Northwestern Medicine, Center for Comprehensive Orthopedic and Spine Care, Chicago, IL.

Br J Sports Med 2018 Nov 13. Epub 2018 Nov 13.

La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Victoria, Australia.

Objectives: Lumbar bone stress injury ('bone stress injury') is common in junior fast bowlers. The repetitive loading of cricket fast bowling may cause bone marrow oedema (BMO), detectable on MRI, before the bowler suffers from symptomatic bone stress injury. We investigated the temporal relationship between BMO, bone stress injury, along with bowling workload correlates, in elite junior fast bowlers throughout a cricket season. Read More

Radiographics 2018 Nov-Dec;38(7):2173-2192

From the Departments of Radiology (R.A.M., J.C.M., A.S., B.K.) and Orthopedic Surgery (M.J.W., M.F.), Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115.

Traumatic and atraumatic fractures are entities with distinct but often overlapping clinical manifestations, imaging findings, and management protocols. This article is a review of terminology, etiology, and key imaging features that affect management of atraumatic fractures including stress fractures, atypical femoral fractures, and pathologic fractures. The terminology of atraumatic fractures is reviewed, with an emphasis on the distinctions and similarities of stress, atypical, and pathologic fractures. Read More

Bone Joint J 2018 Nov;100-B(11):1455-1462

Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.

Aims: Osteolysis, secondary to local and systemic physiological effects, is a major challenge in total hip arthroplasty (THA). While osteolytic defects are commonly observed in long-term follow-up, how such lesions alter the distribution of stress is unclear. The aim of this study was to quantitatively describe the biomechanical implication of such lesions by performing subject-specific finite-element (FE) analysis on patients with osteolysis after THA. Read More

PLoS One 2018 7;13(11):e0205958. Epub 2018 Nov 7.

Energy Division, Saskatchewan Research Council, Regina, Saskatchewan, Canada.

It is generally difficult to predict fractures of low-permeability reservoirs under high confining pressures by data statistical method and simplified strain energy density method. In order to establish a series of geomechanical models for the prediction of multi-scale fractures in brittle tight sandstones, firstly, through a series of rock mechanics experiments and CT scanning, we determined 0.85 σc as the key thresholds for mass release of elastic strain energy and bursting of micro-fractures. Read More

Osteoporos Int 2019 Jan 5;30(1):201-209. Epub 2018 Nov 5.

Endocrine Unit, Massachusetts General Hospital, 50 Blossom Street, THR-1051, Boston, MA, 02114, USA.

Lower fracture rates in Black men and women compared to their White counterparts are incompletely understood. High-resolution imaging specific to trabecular bone may provide insight. Black participants have enhanced trabecular morphology. Read More

Eur J Radiol 2018 Nov 1;108:28-42. Epub 2018 Sep 1.

Fortius Clinic, 17 Fitzhardinghe Street, London W1H 6EQ, United Kingdom. Electronic address:

Injuries of the lumbar neural arch, in particular the pars interarticularis, are widely considered to be due to abnormal bone stress secondary to repetitive loading/shearing, and are a common pathology and a main cause of lower back pain in elite athletes across a range of sports. Medical imaging plays a pivotal role in the diagnosis, monitoring and prognostication of neural arch injury. Early detection is highly desirable in the young elite athlete, as early injuries have been shown to require shorter recovery time and have a higher potential of full healing, whilst accurate grading of injury allows appropriate rehabilitation planning. Read More

J Trauma Nurs 2018 Nov/Dec;25(6):360-365

University of Delaware School of Nursing, Newark.

Effective treatment of acute pain during hospitalization following lower extremity fracture is critical to improve short-term patient outcomes including wound healing, stress response, hospital length of stay, and cost as well as minimizing long-term negative patient outcomes such as delayed return to work, disability, and chronic pain. As many patients report moderate to severe pain during hospitalization, identifying the analgesics that most effectively reduces pain is a priority to improve patient outcomes. The purpose of this review was to examine published studies describing patient response to analgesics administered orally (PO) or intravenously (IV) in the immediate hospitalization following lower extremity fracture. Read More

Comput Methods Biomech Biomed Engin 2018 Sep 27;21(12):663-672. Epub 2018 Oct 27.

a Department of Structures for Engineering and Architecture (DiSt), Polytechnic School - College of Engineering , University of Naples Federico II , Naples , Italy.

Total Hip Arthroplasty requires pre-surgical evaluation between un-cemented and cemented prostheses. A Patient with intra-operative periprosthetic fracture and another with a successful outcome were recruited, and their finite element models were constructed by processing CT data, assuming elastic-plastic behavior of the bone as function of the local density. To resemble the insertion of the prosthesis into the femur, a fictitious thermal dilatation is applied to the broach volume. Read More

Acta Med Okayama 2018 Oct;72(5):531-534

Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan.

A 60-year-old Japanese woman with severe osteoporosis presented with a history of right buttock pain and right lateral lower leg pain in an L5 distribution. She had been treated with methotrexate and methylprednisolone for rheumatoid arthritis (RA) and interstitial pneumonia. Computed tomography demonstrated a sacral stress fracture in the right sacral ala. Read More

Eur J Nucl Med Mol Imaging 2019 Apr 19;46(4):1019-1036. Epub 2018 Oct 19.

Department of Radiology and Nuclear Medicine, Cantonal Hospital Lucerne, Lucerne, Switzerland.

Osteoid osteoma is a painful, benign, osteoblastic lesion that occurs in younger patients and affects the extremities or the axial skeleton. While plain film findings may suggest the diagnosis, in complex anatomical regions such as the spine, pelvis, wrist and foot advanced imaging modalities are often required. A typical nidus surrounded by sclerosis or cortical thickening characterizes osteoid osteoma on plain radiography and CT. Read More