Volkmar Jansson

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OBJECTIVE To define non-bacterial osteitis (NBO) as a clinical entity possibly associated with autoimmune manifestations. Patients with sterile osteitis were analysed to develop diagnostic criteria. METHODS A total of 89 patients with non-bacterial inflammatory bone lesions were observed for a median of 49 months. History, diagnostic imaging, laboratory(More)
We describe postoperative functional outcome and accuracy of implant position in 38 cases after unicompartmental knee arthroplasty with the Oxford knee prosthesis with a standard open approach compared with 30 cases with a minimally invasive approach. Patients with the minimally invasive approach had significantly better functional results, with an average(More)
Inaccurate implantation rates of up to 30 % have been reported in cases using the conventional technique for implantation of a unicompartmental knee arthroplasty. Navigation should permit a more precise implantation, and several studies have investigated its role, albeit with a limited number of patients and inconsistent results. The aim of this(More)
Synovial hemangioma is a rare benign intra-articular tumor. It may be a cause of pain and recurrent joint swelling in children and young adults. This report presents a 29-year-old patient with a synovial hemangioma in the left knee joint. Magnetic resonance imaging (MRI) showed the typical features of a soft tissue hemangioma and revealed a cystic invasion(More)
Die chronisch rezidivierende multifokale Osteomyelitis (CRMO) ist eine abakterielle Form der Osteomyelitis, die vorwiegend im Kindesalter auftritt und in etwa 20% mit einer palmoplantaren Pustulose (PPP) assoziiert ist. Bei bislang ungeklärter Ätiopathogenese wird die CRMO klinisch dem rheumatischen Formenkreis zugeordnet. Eigene Untersuchungen deuten(More)
Advantages of minimally invasive total hip arthroplasty (THA) are controversially discussed. In this prospective study 51 patients (52 hips) were randomly allocated to a classical lateral or a minimally invasive approach (modification of the Hardinge-approach). Operating time, intraoperative blood loss, postoperative hemoglobin, muscle enzymes CK and(More)
We analyzed osseous reactions in the rabbit femoral condyle to coralline hydroxyapatite bone substitutes of various pore sizes by radiology and histology. The results were compared to bone repair of empty cavities and to integration of allografts. Spontaneous bone repair of the empty cavities took approximately 12 weeks, while integration of the(More)
OBJECTIVE To accurately differentiate nonbacterial osteitis (NBO) from other bone lesions by applying a clinical score through the use of validated diagnostic criteria. METHODS A retrospective study was conducted to assess data on patients from a pediatric clinic and an orthopedic tertiary care clinic, using administrative International Classification of(More)
Diagnosis of avascular necrosis (AVN) of the femoral head depends on the combination of clinical symptoms and evaluation of radiographs and/or magnetic resonance imaging (MRI). To evaluate the evolution of AVN, the Ficat and the Association Research Circulation Osseous (ARCO) classification are commonly used to assess both imaging modalities. For comparison(More)
Poly(ether ether ketone) (PEEK) and its composites are recognized as alternative bearing materials for use in arthroplasty because of their mechanical properties. The objective of this project was to evaluate the biological response of two different kinds of carbon fiber-reinforced (CFR) PEEK compared with ultra-high molecular weight polyethylene (UHMWPE)(More)