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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.
Autoxidation It is generally agreed that "autoxidation", that is, the reaction with molecular oxygen via a self - catalytic mechanism, is the main reaction involved in oxidati
Calvin cycle electron transport chain glycolysis Kreb's cycle photosystem II.
What is Brown Algae ? Phaeophyta are commonly known as brown algae; precisely because they are - guess what? - brown in color! They are brown because they contain brown colored
Consider 100 ml of 10% solute and 10 ml of 50& solute. Which has the greatest concentration of solute? What is the concentration of solute? Which has a greater quantity of solute?
To study whether bacteria grow best where it is moist or dry Use 2 sterile dishes. Inoculate each one by touching a sterile transmit needle to a bacteria colony rowing in anoth
Why do you think the mitochondria contain their own DNA (circular) and have a double membrane?
Q How does water move in sponges? What is the function of the pores in these animals? Sponges are filtering beings they make water enter their bodies by their lateral pores. Wa
discuss locomotion in annelids
Endocytosis is the uptake of extracellular macromolecules across the plasma membrane into the cell. The objects to be ingested is progressively enclosed by a small portion of
Pathogenesis The mode of intracellular replication of chlamydial agents is investigated morphologically and cytochemically with both light and electron microscope. It is estab
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