BACKGROUND Bone graft procedures have been used commonly in buco-maxillo-facial surgery. For this reason, many researchers have evaluated the bone substitutes. PURPOSE The present study evaluated soft and hard tissue reactions to two different hydroxyapatites HAs (synthetic HA and natural HA) and bioactive glass implanted into the sockets immediately after extraction. MATERIALS AND METHODS ...

Introduction: It has been suggested that collagen provides the ductility in bone [1], but the relationship between the failure properties of intact bone and isolated bone collagen has not been investigated. Such a relationship could have substantial clinical implications since ductility, which decreases with age [2-4], affects the ability of bone to deform rather than fracture under severe load...

Tibia segmental defect healing in sheep were clinically, radiographically and histologically evaluated. Twelve young sheep aged four to five months were divided into two groups, G1 and G2. A 3.5 cm long segmental defect was created in the right tibial diaphysis with maintenance of the periosteum. The bone defects in both groups were stabilized with a bone plate combined with a titanium cage. In...

Purpose The physicochemical properties of a xenograft are very important because they strongly influence the bone regeneration capabilities of the graft material. Even though porcine xenografts have many advantages, only a few porcine xenografts are commercially available, and most of their physicochemical characteristics have yet to be reported. Thus, in this work we aimed to investigate the p...

The endometrium is central to mammalian fertility. The endometrial stromal cells are very dynamic, growing and differentiating throughout the estrous cycle and pregnancy. In humans, stromal cells appear to have progenitor or stem cell capabilities and the cells can even differentiate into bone. It is not clear whether bovine endometrial stromal cells exhibit a similar phenotypic plasticity. So,...

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...

Over the years, we have seen how, thanks to experimentation on animal models, foundations been laid in field of implantology. In most cases, studies related bone scale are carried out species that similar their movements and behavior humans. The femur has selected as reference for our test, selecting animals experiment with goat breed, bovine breed porcine similarity human body, obtaining speci...

considering the importance of bone augmentation prior to implant placement in order to obtain adequate bone quality and quantity, many studies have been conducted to evaluate different techniques and materials regarding new bone formation. in this study, we investigated the bone healing capacity of two different materials deproteinized bovine bone mineral (dbbm with the trade name of bio-oss) a...

The mineralized matrix of osseous tissue harbors abundant mitogenic activity which is extractable by demineralizing solvents. In bovine bone powder free of blood and cartilage contamination, the volume concentration of mitogens is up to 20 times greater than in serum. Growth factor activity in bone extracts was quantitated on quiescent mouse BALB/c/3T3 fibroblasts, where [3H]thymidine incorpora...