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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.
Organisational Behaviour of Health Care The insights provided by the theories of organisational behaviour emphasise the need for the establishment of institutional frameworks
What Factors causing short-term changes in intra-ocular pressure 1) Arterial blood pressure 2) Systemic venous pressure (SVP) 3) Mechanical pressure 4) Plasma osmolari
What are the main parts of ferns? Ferns are constituted by small roots that come downwards from the rhizome (stem, often orizontalized). The fronds also arise from the rhizome.
Define Qualitative Estimation of Protein/Amino Acid Content in Foods? The protein and amino acid content of foods helps to interpret nutritional differences among foods in term
what are the adaptations of amoeba
What is the concept of Mesonephric? Replaces the pronephros during development and is retained as functional kidney in adult fish and amphibians. Formed posterior to pronephros
State the Disorders of sleep The need for sleep varies considerably from one person to another, as well as in the same person at different stages of life. We have all been told
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Proestrus - Estrous cycle This precedes the next heat and is characterised by functional involution of the corpora lutea and preovulatory swelling of the follicles. Fluid coll
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