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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.
LOCOMOTION IN STAR FISH - With the help of tube feet aided by fluid pressure in them. In a tube feet upper ampulla, middle podium and lower sucker present.
what is the opposite of yield? A.grow B.attack C.ask D.answer
Making smoke prints of leaves Smoke prints of leaves may be simply made by following the four steps shown in the diagrams. Cover the side of a smooth, round bottle with a thin l
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Does an increase of H+ cause the hemaglobin oxygen binding curve to shift to the left or right? Explain.
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CILIA AND FLAGELLA Purkinj e first observed ciliary movement. Hodge studied detail structure of sperm flagellum. Manton studied structure of cilia in plants.
a - HELIX In this intra molecular hydrogen bonds are present The polypeptide chain is spirally coiled, generally in a clock-wise or right handed fashion. Glycine
Determine the Nature and Degree of Abnormality The nature and degree of abnormality will effect normal neural growth and maturational outcome. For example, in an adult damage t
Classification of the reasons of implant failure: In order to understand failures it is vital to know, why they occur. The reasons are plenty and to streamline, these have been
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