Biodegradable_Polymers_Use_In_dental_Application.pptx

6. Biodegradable Polymer  Homopolymers of lactide and its copolymers formed with glycolide, that is, biodegradable polyesters (Synthetic) , such as poly(lactic acid), poly(glycolic acid), and poly(lactic co-glycolic acid).

7. Question usually arises • What is the difference between biodegradable membranes and bone grafting material? • What is the degradation time of the biodegradable membrane? • What happens to the membrane? What does it degrade into?

Editor's Notes

When a hole is created in the bone, for example when a tooth is removed or because of an infection Soft tissue grows into the wound space very quickly and prevents bone from forming When bone is needed to support a tooth or dental implants, uncontrolled gum tissue growth can be a problem.
Periodontal Disease, or Gum disease, is an infection of the gums caused by bacteria. If left untreated, pockets of infection form between the gums and the roots of the teeth. Eventually, the tissue connecting the teeth and the gums begins to break down, causing the teeth to loosen. Treatment usually involves thorough cleaning and, in more advanced cases, surgery may be required. This can include cutting and peeling back the gums to allow the bacteria and plaque to be scraped off the root surfaces.
Metals Does not stick to the tooth, Conducts heat too well In ceramics the coating of polymer is too thick, separate from the tooth surface PMMA has load bearing property but as non-degradable hinder healing Dental caries and composite fillings have poor X-ray contrast with their surroundings PMMA has a maximum water absorption ratio of 0.3–0.4% by weight.[
1-which means the dentist has to make a large undercut cavity to keep the filling inplace 2-the may provide a key for the filling ,than is during the necessary with amalgam fillings setting process, which weakens the bond between the filling and the tooth , thin wall alignment difficult 3-, which makes it hard for the dentist to identify new areas of decay The GTR technique therefore employs a barrier membrane of variable porosity, to prevent epithelial down-growth and fibroblast trans-growth into the wound space, thereby also facilitating the maintenance of the space site for target periodontal tissue regeneration GTR-mediated healing demonstrates that new connective tissue attachment to the root surface forms with minor contributions from new cementum and bone formation Bone grafting: Bone grafts aim to restore the height of the alveolar bone around a previously diseased tooth; Bone formation occurs when The collagen molecules polymerize to form collagen fibers. Calcium salts precipitate in the ground substance along the collagen fibers to form osteoid. Osteoblasts become trapped in the osteoid and become osteocytes. Basically, bone formation after the implantation of different bone grafts=substitutes may exhibit different biological performance Moreover, histological evidence of true periodontal regeneration has been limited. In many instances, alveolar bone regeneration is seen in association with the formation of a long junctional epithelium, representing periodontal repair and not true regeneration.
Soft tissue, such as gum tissue, grows very fast while bone grows more slowly. When a hole is created in the bone, for example when a tooth is removed or because of an infection, soft tissue grows into the space very quickly and prevents bone from forming there. When bone is needed to support a tooth or dental implants, uncontrolled gum tissue growth can be a problem. A Membrane can be used to cover the hole and act as a barrier to block out the gum tissue from growing into the area. This allows the more slowly growing bone to fill the hole without any competition. Guided Soft tissue, such as gum tissue, grows very fast while bone grows more slowly. When a hole is created in the bone, for example when a tooth is removed or because of an infection, soft tissue grows into the space very quickly and prevents bone from forming there. When bone is needed to support a tooth or dental implants, uncontrolled gum tissue growth can be a problem. A Membrane can be used to cover the hole and act as a barrier to block out the gum tissue from growing into the area. This allows the more slowly growing bone to fill the hole without any competition. Guided

Biodegradable_Polymers_Use_In_dental_Application.pptx

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Biodegradable_Polymers_Use_In_dental_Application.pptx

Editor's Notes