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Osseointegration Vs. Biointegration
In 1985, dePutter observed that there are two ways of implant anchorage or retention: mechanical and bioactive. Mechanical retention refers to the metallic substrate systems such as titanium alloy. The retention is based on the undercut forms such as vents, slots, dimples, screws etc and involves direct contact between the dioxide layer on the base metal and bone with no chemical bonding. Bioactive retention is achieved with bioactive materials such as hydroxyapatite (HA), which bond directly to the bone, similar to ankylosis of natural teeth. Bone matrix is deposited on the HA layer as a result of physicochemical interaction between the collagen of bone and the HA crystals of the implant.
Low levels of dissolved salts characterise the freshwater biomes. The salt content of fresh water is about 0.005 percent. The freshwater biomes consist of inland bodies of standing
feeding habit of branchiostoma?
Biochemistry pathway of normal and cancer cell Normal cells will separate within the presence of a chemical signal like as "growth factor" (GF). Other molecular signals
Hunting and Export - Wildlife The hunting and export of excessive numbers of certain animal species is another important factor leading to dangerous reductions in numbers. The
Optic vesicle We have explained earlier that the presumptive material for the optic vesicles lies in qe eye field in the anterior region of the early neural plate. Experiments
Adaptive Radiations The organisms all the time tend to establish harmony with their environment. This process, called adaptation, enables the organism to face the vagaries of
Calculate the diffusion coefficient of a protein bovine serum albumin at 23 degree Celsius?
Q. Which are the structures that are part of the nervous system? The structures that form the nervous system can be divided into the peripheral nervous system (PNS) and the cen
Pelagic Zone - Organisation of the Marine Ecosystem The waters contained in the sea basin, constitute the pelagic zone which is divided into The neritic zone situ
Define Derived proteins - Primary Protein Derivatives? Derived proteins are the derivatives of the protein molecule, apparently fonned through hydrolytic changes in the molecu
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