Bone Abstracts

Objective: I.m. injections with Botox (BTX) leads to a paralysis of the muscles, resulting in a rapid loss of muscle and bone mass (disuse osteoporosis). Adipocytes and osteoblasts derive from the same mesenchymal stem cell, and commitment to one linage represses commitment to the other. Furthermore, the existence of a close communication between bone cells and endothelial cells is widely accepted.The purpose of the study was to quantify the changes in a...

Backround: Usually, skeletal development and bone age in children are still examined by x-ray. In obstetrics the use of fetal ultrasonography (US) of the distal femoral epiphyseal (DFE) and proximal tibial epiphyseal (PTE) ossification centers helps to identify intrauterine growth retardation. And US has been shown to be an excellent tool to assess the mineralization of bones. First ultrasound studies were following the mineralization of bones in young infants.<p class="ab...

see P475....

Hypophosphatasia (HPP) is the rare inherited metabolic disease caused by loss-of-function mutations in the tissue-nonspecific alkaline phosphatase (TNSALP) gene. TNSALP deficiency leads to extracellular excess of inorganic pyrophosphate, a bone mineralization inhibitor. Here, we report the validity and reproducibility of a novel scale to quantify HPP-specific radiographic changes in pediatric patients.The Radiographic Global Impression of Change (RGI-C) ...

Hyperthyroidism in mice is associated with a low bone mass, an increased bone turnover and high serum levels of sclerostin, a potent Wnt inhibitor. Here, we explored the effects of either reducing bone turnover with bisphosphonates or increasing bone formation with neutralizing sclerostin antibodies (Scl-Ab) on bone mass and estimated strength in hyperthyroid mice.Twelve-week-old C57BL/6 male mice were rendered hyperthyroid by adding L-thy...

Cysteine-rich with EGF like domains 2 (Creld2) has recently been identified as an endoplasmic reticulum (ER) stress inducible gene in the context of skeletal dysplasia caused by mutant protein accumulating in the ER eliciting an unfolded protein response (UPR). Creld2 was originally implicated in ER stress following the treatment of Neuro2α cells with thapsigargin. Furthermore, the promoter of Creld2 contains an ER stress activating transcription factor ...

Objectives: Evaluate nutritional status influence upon bone mineral density (BMD) of children with CP diagnosis after reconstructive hip joint surgery.Methods: Eighteen children with CP diagnosis with III-V level Gross Motor Function Classification System took part in the research. All patients received reconstructive medical treatment in child traumatic-orthopedic unit of health center after reconstructive hip joint surgery. Anthropometric measurement c...

Presenting problem: Severe forms of juvenile Paget’s Syndrome (JPD) result in extreme bone turnover, necessitating long-term treatment with anti-resorptive drugs to control for bone pain and modeling of bones.Objective: To report clinical and biochemical effects of intravenous treatment with Pamidronate in two children with severe forms of JPD over a time period of 3 and 9 years, respectively. Treatment was commenced at 12 months and 3 years of age,...

Objectives: Optic neuropathy (ON) is a critical complication of fibrous dysplasia (FD). Early surgical decompression can prevent blindness; however, prophylactic intervention may cause blindness from intra-operative nerve damage. There is therefore a critical need to develop diagnostic tests for accurate and early detection of ON in patients with FD. Currently used methodologies, including radiographic evaluation of optic canal size and optic nerve length, are suboptimal and c...

Despite widely accepted classical mechanical theory of buttresses as a load bearing areas in the midfacial skeleton, the data related to its microstructural adaptation on functional demands are scarce. In this study we investigated microstructural features of the different regions in the facial bones in relation to the occlusal load dissipation using a combination of finite element analysis (FEA) and micro-CT analysis (μCT). The FEA was performed on the model of the dry h...