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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.
how pollination occurs in Salvia?
Simple diffusion Only comparatively small uncharged or hydrophobic molecules (H2O, O2, and CO2, other gases, urea and ethanol) cross the lipid bilayer through simple
What are the approaches to the design of retaining walls? The approach to the design of retaining walls can be started as follows: a. Chosse a trial dimension of the wall
Sunlight is absorbed by chlorophyll molecules. Chlorophyll is a porphyrin in that nitrogen atoms are coordinated to a magnesium ion instance for it is a magnesium porphyrin. This
State the symptoms of epilepsy Three particular symptoms are found in many types of epilepsy: 1) An aura, or warning, of impending seizure: This aura may take the form of a
Explain the Management of Middle - Third Perforation Same to coronal one-third perforation, except defects located more deeper from the access cavity. For successfully
Ciliated Protozoan Ciliates form the largest and the most homogenous group of protozoans. They are placed under one phylum Ciliophora and evidence indicates that its members s
After glaciers, ice caps and snowfields, ground water is the next largest fresh water reservoir. Precipitation that does not evaporate back into the air and does not run off over t
Define the factors effect the Quantity of Human Milk? A large healthy baby who can vigorously suck will induce and obtain much more milk from its mother than a small, sickly or
detail study of coelenterata
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