Robert Willvonseder

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Regulation of the balance of osteoblastic and osteoclastic activity is critical for the understanding of normal cell biology and forms the basis of metabolic bone diseases. Our study reports about influences of age and gender on serum levels of osteoprotegerin (OPG) and its association to other clinical parameters of bone metabolism in a precisely(More)
BACKGROUND Because there is reason to assume that also in Austria calcium and vitamin D malnutrition is wide-spread, we initiated a comprehensive study on calcium and vitamin D status in relation to bone health in a large group of the normal adult population. SUBJECTS AND METHODS We assessed dietary calcium and vitamin D intake, serum concentrations of(More)
BACKGROUND There is increasing evidence that correct interpretation of bone mineral density (BMD) measurements by dual energy X-ray absorptiometry (DEXA) requires a population-specific reference range. We therefore collected data on age-related BMD in a random sample of the normal adult Austrian population to establish an appropriate normative database. (More)
With advancing age both sexes have an increased incidence of osteoporotic fractures, although fractures are more common in women than in men. Whereas in women several potential risk factors have been identified, less is known about osteoporosis in men. A total of 27 Austrian men (mean age: 65 +/- 2 years) with atraumatic spine fractures were studied. In all(More)
BACKGROUND In contrast to osteoporosis in postmenopausal women, osteoporosis in men has received much less attention. PATIENTS AND METHODS We determined various biochemical parameters of bone metabolism and sex hormones in 31 men with idiopathic osteoporosis and 35 age matched control subjects. RESULTS In the men with osteoporosis, a significantly(More)
In experimental and clinical studies, conflicting results regarding the effect of oral anticoagulant therapy on bone metabolism have been reported. To measure a possible influence of long-term anticoagulant therapy with phenprocoumon on peripheral bone mass, measurements of peripheral bone mineral content (BMC) and serum osteocalcin levels were performed(More)
Since it has been suggested that gastric resections are followed by changes in bone metabolism, the aim of our study was to determine the biochemical parameters of bone metabolism and radial and lumbar bone density in 15 male ulcus patients treated by partial gastrectomy (Billroth II). Comparing the data with those of a corresponding control group, the(More)
Serum levels of osteocalcin (OC) have been found to be a specific biochemical parameter of bone formation. We measured serum levels of osteocalcin, parathyroid hormone (PTH) and 25-hydroxyvitamin D (25(OH)D) in 49 patients with liver cirrhosis, who are known to have an increased prevalence of metabolic bone disease, and a matched control group (n = 35).(More)
Because activity and regular exercise are important factors to maintain general good health in senior citizens, we investigated whether senior dancing has any effect on peripheral or lumbar bone density. We performed a prospective study over a12-mo period on bone density at a spinal and peripheral measuring site in 28 female senior members (mean age: 67 +/-(More)