Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Define osseointegration and its theories?
Osseointegration implies that "it is a contact established without interposition of non bony tissue between normal remodeled bone and an implant at the light microscopic level, entailing a sustained transfer and distribution of load from the implant to and within the bone tissue". Osseointegration can also be defined as "a direct structural and functional connection between ordered, living bone and the surface of a load carrying implant" Creation and maintenance of osseointegration, therefore, depends on the understanding of the tissue's healing , repair, and remodeling capacities.
Branemark's Theory of Osseointegration
Branemark proposed that implants integrate such that the bone is laid very close to the implant without any intervening connective tissue. Branemark also stated that the implant should not be loaded and left out of function during the healing period for osseous integration to occurWeiss's Theory of Fibroosseous fixation Weiss' theory states that there is a fibro-osseous ligament formed between the implant and the bone and this ligament can be considered as equivalent to the periodontal ligament found in the gomphosis. He defends the presence of collagen fibers at the bone-implant interface. Biointegration - 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.
how to make a membrane protein which in ER transfer to PM. whether can cut some amino of sequence which play as signal guide the protein to where could the problem
Q. Are Fibrates effective at lowering TG levels? Fibrates are effective at lowering TG levels by 20 per cent to 50 per cent and raising HDL by 10-35 per cent. LDL reduction var
Economic importance of obelia
Phylum Apicomplexa - Protozoan Characteristic set of organelles (apical complex) asssociated with the anterior end present in some developmental stages. Cilia and flagella abs
significance of gastrulation
Mechanism of Stomatal Opening It has been known for over a century that stomata open because of reversible turgor changes in the guard cells. Stomata open when turgor in the g
What is the excitation threshold of a neuron? How does this threshold relate to the "all-or-nothing" rule of the neural transmission? The excitation threshold of a neuron is th
Chest Observe for retraction of the intercostal muscle which is indicative of severe respiratory distress (a sign of hyaline membrane disease). Inspect the brea
What is an antigen? Antigen is any substance, particle or infectious agent known as foreign to the body. The contact of the antigen with the body promotes a defense reaction ag
Q. Etiological factor of dyspepsia? The main etiological factor of dyspepsia is the failure of proper digestion and absorption of food in the alimentary tract and the consequen
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd