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How to select restorative materials

How to select restorative materials

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How to select restorative materials

  1. 1. How to Select Restorative Materials Prepared By : Saeed Bajafar Muhammsd Raffat Fadi Emad Nouran Waleed
  2. 2. Successful results in operative dentistry cannot be achieved without using proper restorative materials. The final restoration will never be better than the properties of the material selected for its fabrication. Many changes have occurred in the development and availability of dental restorative materials for pediatric patients over the last 60 years. Indrouction :
  3. 3. Why ? Repair or Limit the damage Reestablish Adequate Function Maintaining Good Oral Hygiene Restore Esthetics Maintain Pulp Vitality Preserve the Tooth Structure
  4. 4. The restoration is expected to perform certain FUNCTIONS : To stop further progress of lesions in hard tissue or loss of these tissues .1To prevent future recurrence of caries .1To restore and maintain normal interproximal embrasures and contact areas .1To sustain functional forces .1To restore and maintain esthetics
  5. 5. 1. Adaptability to cavity walls and margins 2. Great strength properties 3. Dimensional stability in the cavity 4. Biologic compatibility with the adjacent structures and pulp 5. Insolubility in the fluids of the mouth 6. Harmonious color 7. Low thermal conductivity and thermal changes 8. Convenience of manipulation To achieve these objectives the restorative material used is required to possess DEFINITE PROPERTIES.
  6. 6. 1. Adaptability To Cavity Walls And Margins This refers to the degree of proximity to cavity walls and margins that the restorative material will be able to attain and maintain under oral conditions.
  7. 7. The restorative material must have adequate strength against all the types of functional stresses including tensile, compressive, shear and impact, whether these be static or dynamic. 2-Great Strength Properties
  8. 8. The restoration must exhibit no dimensional changes in the form of EXPANSION or CONTRACTION after being placed in the cavity whether during setting or due to thermal changes in the mouth. 3-Dimensional Stability In The Cavity
  9. 9. 4-Biologic Compatibilty With The Adjacent Structure And Pulp Restorative material must be free from noxious effects on the gingival tissues and the pulp 5-Insolubility In The Fluids Of The Mouth The restorative material must be perfectly insoluble in the fluids of the mouth irrespective of its type and pH fluctuations
  10. 10. To stimulate the color of the tooth, the restorative material is required to have the combined color of enamel and dentin. 6-Harmonious Color The restoration may be subjected, even temporarily, to wide ranges of temperature changes. Therefore, it should be nonconductor of heat 7-No Conductivity To Thermal Changes
  11. 11. The restorative material must be easy to fabricate without detailed procedures or expensive special equipment. 8-Convenience Of Manipulation
  12. 12. The Available Restorative Material Amalgam .1Composite Resin .1Glass Ionomer .2-Conventional Glass Ionomer •-Resin Modified Glass Ionomer .1Stainless steel crown
  13. 13. Amalgam Because of concerns about toxicity and environmental pollution, plus the availability of alternative materials, amalgam is less frequently used. However, it still remains an acceptable and durable material for class I and II restorations in primary molars. Advantages : - Simple - Quick - Cheap - Technique insensitive - Durable Disadvantages : - Not adhesive - Bad esthetics - Requires mechanical retention in the cavity - Environmental and occupational hazards
  14. 14. Composite Resin Early studies suggested poor performance in primary teeth, but modern materials placed with good isolation (i.e. rubber dam) perform as well, or better than amalgam, but take longer to place. Advantages : - Adhesive - Aesthetic - Reasonable wear properties - Command set Disadvantages : - Technique sensitive - Rubber dam required - Expensive
  15. 15. Glass Ionomer cement Has advantages of adhesion and fluoride release, but is more technique sensitive and less wear resistant than amalgam. Useful in non-load bearing class III and V cavities, temporization of primary teeth in young, pre-cooperative children, or teeth near to exfoliation. Advantages : - Adhesive - Aesthetic - Fluoride leaching Disadvantages : - Brittle - Susceptible to erosion and wear
  16. 16. Resin Modified Glass Ionomer Advantages : - Adhesive - Aesthetic - Command set - Simple to handle - Fluoride release Disadvantages : - Water absorption - Significant wear
  17. 17. Stainless Steel Crown Advantages : - Durable - Protect and support remaining tooth structure Disadvantages : - Extensive tooth preparation - Patient cooperation required - Unaesthetic
  18. 18. Age Esthetic Demands Child’s Co-operation Life span of primary teeth Degree of caries Cost Restorative Situation Colleague appraisal Research reports Factor Affecting The Choice Of Dental Material
  19. 19. Selecting Restorative Material according to AAPD
  20. 20. Selecting Criteria for Full Coverage of Primary Incisor :
  21. 21. Various Hypothetical Clinical Scenarios
  22. 22. Various Hypothetical Clinical Scenarios
  23. 23. Various Hypothetical Clinical Scenarios
  24. 24.  Recurrent caries, often due to failure to adequately complete caries removal because of flagging patient cooperation or failure to use adequate LA. If unable to finish cavity it is better to place a temporary dressing (GIC often best) and try again at another visit.  Cavity preparation does not satisfy the mechanical requirements of the filling material.  Inadequate moisture control, especially true of GI cements, compomers, and composites.  Presence of occlusal high spot. Reasons For Failure Of Restorations In Primary Teeth :

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