Background and purpose - Healing of shaft fractures is commonly described as regards external callus. We wanted to clarify the role of the bone marrow compartment in the healing of stable shaft fractures. Patients and methods - A longitudinal furrow was milled along the longitudinal axis of the femoral shaft in mice. The exposed bone marrow under the furrow was scooped out. The mice were then r...

Abstract To benefit tissue removal and postoperative rehabilitation, increased efficiency accuracy reduced operating force are strongly required in the osteotomy. A novel elliptical vibration cutting (EVC) has been introduced for bone compared with conventional (CC) this paper. With assistance of high-speed microscope imaging dynamometer, material removals cortical their forces from two regimes...

Mixed-mode I + II fracture characterization of cortical bone tissue is addressed in this work. The mixed-mode bending test was used to impose different mode ratios. An equivalent crack length data reduction method considered obtain the strain energy release rate components. Crack opening and shear displacements were measured by means digital image correlation. These quantities then integrated p...

Recent bone quantitative ultrasound approaches exploit the multimode waveguide response of long bones for assessing properties such as cortical thickness and stiffness. Clinical applications remain, however, challenging, as the impact of soft tissue on guided waves characteristics is not fully understood yet. In particular, it must be clarified whether soft tissue must be incorporated in wavegu...

The biomechanical response of cortical and trabecular bone tissues represents a fundamental aspect for the interpretation functional dental implants. In case misfit, interaction phenomena occurring within surgical subsequent healing phases must be interpreted primarily in light tissue. This is influenced by specific loadings induced, characterized intensity variable trends. pilot study reported...

Osteomyelitis is an infection-related inflammation of the bones and bone marrow. Generally in legs, arms, spine. Foot ankle osteomyelitis can be excruciatingly painful for patients a difficult management challenge orthopedic surgeons. Acute staphylococcal had 50% death rate pre-antibiotic era. foot occur due to variety reasons, with diabetic infections being one most common. marrow which progre...

background: as various implant geometries present different biomechanical behaviors, the purpose of this work was to study stress distribution around tapered and cylindrical threaded implant geometries using three-dimensional finite element stress analysis.     methods: seven implant models were constructed using the cad system. after digitized models of mandibular section, the crowns were crea...

The long-term stability and qualitative characteristics of periodontium regenerated by FGF-2 treatment were compared with normal physiological healing tissue controls in a Beagle dog 2-wall periodontal defect model 13 months after treatment by assessing tissue histology and three-dimensional microstructure using micro-computed tomography (μCT). After FGF-2 (0.3%) or vehicle treatment at the def...

Ischemia/reperfusion (I/R) injury has been extensively studied in organs such as heart, brain, liver, kidney, and lung. As a vascularized organ, bone is known to be susceptible to I/R injury too, but the respective mechanisms are not well understood to date. We therefore hypothesized that, similar to other organs, plasma cascade-induced inflammation also plays a role in bone I/R injury. Reperfu...

Accurate measurements of physical characteristics of bone are essential for diagnosis, assessment of change following treatment, and therefore, indirectly, for evaluation of new forms of therapy. This is particularly true of osteoporosis and aging skeleton, in which fractures occur easily. Methods: In this study an ultrasonic system was set-up and calibrated on Plexiglas tubes of variable thick...