Searchable abstracts of presentations at key conferences on calcified tissues

ba0003pp355 | Osteoporosis: treatment | ECTS2014

Continuous modelling-based bone formation could explain sustained increases in hip bone mineral density with denosumab treatment

Ominsky Michael S , Libanati Cesar , Boyce Rogely , Kostenuik Paul J , Baron Roland , Wagman Rachel B , Dempster David W

In clinical studies, denosumab (DMAb) administration up to 8 years is associated with continued increases in bone mineral density (BMD) and low fracture incidence despite persistently low bone turnover markers and limited iliac crest tetracycline labelling (Papapoulos 2013). We tested the hypothesis that, with persistently low bone remodelling, BMD increases may result from a non-remodelling dependent mechanism to accrue bone matrix. We examined the fluorochrome labelling patt...

ba0001pp451 | Osteoporosis: treatment | ECTS2013

Estimation of vertebral and femoral strength during the first three years of denosumab therapy using an alternative smooth non-linear finite element methodology

Zysset Philippe , Pahr Dieter , Engelke Klaus , Genant Harry , McClung Michael , Kendler David , Recknor Christopher , Kinzl Michael , Schwiedrzik Jakob , Museyko Oleg , Wang Andrea , Libanati Cesar

Denosumab subcutaneous administration every 6 months reduced the incidence of new fractures in postmenopausal women with osteoporosis by 68% at the spine and 40% at the hip over 36 months compared with placebo in the FREEDOM study (Cummings et al., NEJM, 2009:361:756). This efficacy was supported by differential improvements from baseline in vertebral and femoral strength at 36 months (18.2 and 8.6%, respectively) estimated by an established voxel-based finit...

ba0003pp354 | Osteoporosis: treatment | ECTS2014

Denosumab treatment in women with osteoporosis reduces hip cortical porosity

Zebaze Roger M , Libanati Cesar , McClung Michael R , Zanchetta Jose R , Kendler David L , Hoiseth Arne , Wang Andrea , Ghasem-Zadeh Ali , Seeman Ego

Bone strength is influenced by cortical thickness, area, mass and porosity, all of which contribute to nonvertebral fracture risk. Cortical porosity is one parameter of structural decay associated with bone fragility. This is caused by unbalanced and accelerated remodelling of Haversian units which enlarge, coalesce and fragment the cortex. Antiresorptive therapies will limit progression of cortical porosity; reducing existing porosity would be a goal for those already at incr...

ba0003pp356 | Osteoporosis: treatment | ECTS2014

Changes in lumbar spine QCT, DXA and TBS with denosumab, alendronate or placebo in postmenopausal women with low bone mass

Thomas Thierry , Cheung Angela M , Shane Elizabeth , Zanchetta Jose R , Kearns Ann , Hans Didier , Lin Celia J F , Austin Matthew , Libanati Cesar

Patients with osteoporosis require treatment with therapies that reduce the risk of fracture which at the spine is significantly influenced by bone microarchitecture. Quantitative computed tomography (QCT) and dual X-ray absorptiometry (DXA) allow measurement of bone mineral density (BMD), a known indicator of fracture risk. Trabecular bone score (TBS) is a novel gray-level measurement derived from spine DXA image texture that is related to microarchitecture and associates wit...