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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 is the Emperical evaluation Emperical evaluation based on: i) Time elapsed since stage one surgery - Considering the sigma cycle of bone formation in humans, a time pe
#question.why obelia is considered of special interest in zoology.
Define Swollen and Tender Joints and haemorrhage in various Tissues? Haemorrhages occur deep in muscle, particularly in calf, thigh, buttocks and forearm, causing pain in surro
What is Punnett Squares in genetics? The probability, or likelihood, that a certain phenotypic or genotypic trait will appear in offspring can be predicted and diagrammed using
how does these phylem parasites????
State in brief about Gullstrands Theory A change in the lens is controlled by the balance between elasticity of the lens capsule and the pull of zonules. It is believed that on
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Why do the sons of a haemophiliac father never vary from this trait? Why is the cleavage in mammals referred as simple homoplastic?
life cycle of plathyhelmenthes
Phenolic compounds Gossypol: Gossypol is a toxic compound found in the cotton plant. It is concentrated in the cottonseed but can also be found in other parts of the cotton
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