Plastics. General characteristics. Classification. Composition. The main types of plastics, their appointment
Содержание
- 2. Plastics - materials, which are based on polymers which are in the period of formation of
- 3. The main starting materials for polymer dental materials are monomers and oligomers (mono, I-D, tri-, tetra
- 4. Polymerization - reaction interconnection monomer compounds with double bonds without the formation during the reaction of
- 5. Classification of plastics: 1. origin include: • natural or biopolymers (proteins, nucleic acids, natural number rubber);
- 6. 2. By nature: • organic; • inorganic; • organ elemental.
- 7. Main, which are used for removable and fixed dentures: • base (rigid) polymers; • elastic polymers
- 8. B) Support, which are used at different stages of the manufacture of dentures: • polymer impression
- 9. B) Clinical the temperature conditions of polymerization plastics are "hot" curing; cold curing plastics ( "self-hardening",
- 10. Physical properties of materials Specific gravity - density of the material, the amount of substance per
- 11. Mechanical properties of materials Durability - solid body's ability to resist the impact of external forces
- 12. Elasticity - material property again to return to its original state, acquiring its original shape after
- 13. KEY (CONSTRUCTION) MATERIALS They should be harmless, solid, not collapse under the action of an oral
- 14. The basic materials include: Plastic Porcelain Artificial teeth Metals
- 15. The major components of this type of plastic compositions are: 1) monomer - based plastics; 2)
- 16. Compound of plastic The main component fluids "monomer" is a methyl ester of methacrylic acid stabilized
- 17. Compound of plastic Filler - a substance that affects the strength, hardness, shrinkage, thermal conductivity, resistance
- 18. Pigment - a substance imparting dental polymeric compositions and shades of colors, imitating the tooth tissue
- 19. The catalyst - a substance that accelerates a chemical reaction. The Initiator - a substance which
- 20. Activator - an agent that causes the decomposition of the initiator with the formation of active
- 21. Radiopaque material - barium sulphate, barium fluoride, barium and bismuth glass. Their presence helps to detect
- 22. Radiopaque material - barium sulphate, barium fluoride, barium and bismuth glass. Their presence helps to detect
- 23. Basic (BASIC) CONSTRUCTION MATERIALS The materials used for manufacturing bases removable plate prostheses, called basic materials.
- 24. The basis - the foundation of the denture: it strengthened artificial teeth, clasps and other components
- 25. Basic materials must have the following characteristics: 1) sufficient strength and elasticity necessary to ensure the
- 26. 4) a small specific gravity and low thermal conductivity; 5) sufficient rigidity, low abrasion; 6) indifference
- 27. 7) does not change color when exposed to light, air and other environmental factors; 8) does
- 28. In addition, the base material must meet the following requirements: 1) firmly connected with porcelain, metal,
- 29. For bases used plastic prostheses following types: acrylic; vynilacril modified polystyrene; copolymers or mixtures of appropriate
- 30. Dental copolymers comprise 80% of all medical copolymers comprise copolymers acrylmetacrylate - double or triple copolymers.
- 31. It is now widely used acrylic plastic base “Этакрил " "Акродент" "Фторакс" "Акронил"
- 32. Colorless plastic base Plastic-based stabilizer purified from polymethylmethacrylate containing Tinuvin which prevents aging of the plastic
- 33. Colorless base plastic used for manufacturing dental prostheses bases in cases where counter-stained basis as well
- 34. ELASTIC LINING MATERIALS Need to improve the adhesion of the denture to the oral mucosa, as
- 35. Materials must meet the following medical and technical requirements: 1) is firmly connected with the base
- 36. Indications for use 1) with a sharp ridge atrophy of alveolar processes when contraindicated for all
- 37. Indications for use 5) the need to create an increased adhesion of the prosthesis (for musicians
- 38. Resilient Lining materials for denture bases, depending on the nature of the material is divided into
- 39. Methods of polymerization of basic plastics Plastics made acrylic-based - is the main structural material for
- 40. Methods for forming plastic powder in pasty condition divided into two types: casting and compression molding.
- 41. Plastics Polymerization Polymerization - a chemical reaction in which there is an association of molecules of
- 42. To study the basic acrylic resin polymerization quality using three methods: 1. Polymerization for "water bath"
- 43. 2. The polymerization to dry under pressure;
- 44. 3. Polymerization an improved apparatus for foundry molding.
- 45. Plastics for fixed prostheses Most plastics used "Sinma-M" and "Sinma-74." This acrylic hot curing plastic such
- 46. Artificial teeth Sets the front teeth are divided into 17 sizes. The main part of the
- 48. Скачать презентацию