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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.
what are characteristics of protozoa?
FUNCTIONS OF E.R. (1 ) Mechanical support - E.R. participates in formation of cytoskeleton with microfilaments, microtubules and intermediate filaments. (2 )
What are the Chemical requirements of implant materials It must withstand corrosion by body fluids It should not have any direct or indirect negative effects on the surround
The complications that occur in the heart due to hypertension are left ventricular hypertrophy, diastolic dysfunction and cardiac failure. There is also associated coronary artery
Protozoans ingest food by phagocytosis, and consequently, the ingested food is surrounded by a plasma membrane creating a food vacuole, or phagosome. Digestion does not start until
Omnispective Classification This is the extension of the concept of natural classification put forward by Black Welder (1967). The approach seems quite realistic and pragmatic.
Can you recognize the eight stages of meiosis based on the location and behavior of the chromosomes? Drag the diagrams of the stages of meiosis onto the targets so that the four st
Q. How does the hypophysis- corpus luteum negative feedback work? What is the name given to the atrophied corpus luteum after this feedback process? After ovulation the estroge
What are the benefits of cardiac rehabilitation ? The most substantial benefits include: 1 Improvement in exercise tolerance. 2 Improvement in symptoms. 3 Improvement in blood
Adenosine triphosphate (ATP) is a general form in which the energy is stored in living systems; comprises of a nucleotide (with ribose sugar) with three phosphate groups. Energy c
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