Background and Aim: Dental implants with angled abutments are often inserted in the anterior maxillary region due to the status of the residual ridge and aesthetic considerations. The purpose of this study was to assess stress and strain distributions in the premaxillary bone around dental implants by means of finite element analysis (FEA). Materials and Methods: Four three-dimensional (3D) fi...

PURPOSE The purpose of this study was to compare the bone regeneration effects of cortical, cancellous, and cortico-cancellous human bone substitutes on calvarial defects of rabbits. METHODS Four 8-mm diameter calvarial defects were created in each of nine New Zealand white rabbits. Freeze-dried cortical bone, freeze-dried cortico-cancellous bone, and demineralized bone matrix with freeze-dri...

During the normal growth and development of man and animals the bones grow in length and width and undergo progressive changes in their architecture, a process known as maturation. These normal processes are governed by numerous and complex forces but one of them, the plane of nutrition during the growing period, is of major importance. Undernourished children are small in stature and have bone...

The trabecular and cortical compartments of bone each contributes to bone strength. Until recently, assessment of trabecular and cortical microstructure has required a bone biopsy. Now, trabecular and cortical microstructure of peripheral bone sites can be determined noninvasively using high-resolution peripheral quantitative computed tomography (HR-pQCT). Studies that have used HR-pQCT to eval...

Bone mass is known to vary as a result of age, sex, behavior, and diet; however, little is known about the differences between populations. This study’s objective is to analyze cortical and trabecular bone structure in the proximal femur and to examine differences related to ethnicity and behavior. MicroCT scans were used to collect data from two Native American populations, the forager Black E...

The penetration characteristics of piperacillin-tazobactam into cortical and cancellous bone tissues were investigated in 10 patients undergoing total hip replacement. The concentration ratios of piperacillin/tazobactam were 9.4 +/- 1.8 in cancellous bone tissue and 8.0 +/- 2.2 in cortical bone tissue, which were close to the 8:1 ratio of drugs administered. The mean ratios of drug concentratio...

The regulation of bone metabolism mediated by leptin is a complex process that is not clearly understood. Recent studies suggest that CART (cocaine-amphetamine related transcript) is a significant neuronal co-factor when combined with leptin. CART deficiency is thought to result in low trabecular bone mass, but since leptin exerts contrasting effects on trabecular and cortical bone it is possib...

The structural integrity of ‘‘hard’’ mineralized tissues such as bone is of great importance, especially because bone is the primary structural component of the body, serving as a protective load-bearing skeletal framework. As a structural material, bone is unique when compared with other engineering materials because of its wellknown capacity for self-repair and adaptation to changes in mechan...

OBJECTIVE To comparatively investigate the inorganic composition and crystallographic properties of cortical and cancellous bone via thermal treatment under 700 °C. METHODS Thermogravimetric measurement, infrared spectrometer, X-ray diffraction, chemical analysis and X-ray photo-electron spectrometer were used to test the physical and chemical properties of cortical and cancellous bone at roo...

Objective: The study was designed to evaluate and compare stress distribution intrans cortical section of bone with titanium implant zirconia model under vertical oblique forces in anterior maxillary region. Materials Methods: A three‑dimensional finite element using ANSYS 13.0 software. Around the prepared implant, constructed definitive differentiation outer inner cancellous. Two straight abu...