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.
Chronic Pulmonary Thromboembolism : The operation recommended is pulmonary thrombo endarterectomy. Indication : The main indication for surgery is when patients with chroni
Method for fractionation of subcellular organelles In order to study the composition and the metabolic role of the various subcellular organelles in a cell, it becomes necessar
Define Keratomalacia - Micronutrient Deficiencies? This is a condition of rapid destruction and liquefaction of full thickness of cornea, leading lo prolapse of iris, resulting
Q. Compared to platyhelminthes which physiological problems have the cylindrical body of nematodes brought? How was that problem solved? The cylindrical shape of nematodes made
classification?
What are the blood types of the ABO blood system? The type A, the type B, the type AB and the type O are the blood types of the ABO blood system..
Let us first learn about learn the points counsellor has to keep in mind for positive outcome of the counselling. The counsellor achieves the positive outcome of counselling, couns
parasexual reproduction
Define Regulation of Water Balance - For the Digestive Process? For the digestive process alone, the estimated daily volume of fluid that enters and leaves the gastrointestinal
Which of the following serves as a sensor, or as part of a sensor, that functions in a positive feedback system? A. CaSRs (Calcium-Sensing Receptors) situated in the plasma mem
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