Download Basic Dental Materials (2nd Edition) by Manappallil PDF

By Manappallil

Serves as a keystone to the knowledge of easy Dental fabrics regularly and their program to medical dentistry specifically. This up-to-date completely revised and made over version might serve the scholars, lecturers and pros linked to scientific dentistry. 1. Dentistry and Dental fabrics, 2. simple Nature and houses of Dental fabrics, three. organic concerns of Dental fabrics, four. inflexible effect fabrics, five. Elastic influence MaterialsAgar and Alginate, 6. Elastomeric influence fabrics, 7. Gypsum items, eight. Denture Resins and Polymers, nine. Restorative Resins, 10. Dental Amalgam, eleven. Direct Filling Gold, 12. Restorations, Luting and Pulp TherapyAn creation, thirteen. Dental Cements, 14. Liners and polish, 15. version, solid and Die fabrics, sixteen. Waxes in Dentistry, 17. Dental Casting funding fabrics, 18. Casting tactics, 19. Dental Casting Alloys, 20. Dental Ceramics, 21. Wrought Alloys, 22. Soldering, Brazing and Welding, 23. Abrasion and sharpening brokers, 24. Tarnish and Corrosion, 25. Dental Implant fabrics.

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Additional resources for Basic Dental Materials (2nd Edition)

Example text

Possess a satisfactory consistency and texture. 8. Have adequate strength so that it will not break or tear while removing from the mouth. 9. Possess elastic properties with freedom from permanent deformation after strain. 10. Exhibit dimensional stability. Basic Dental Materials 11. Be compatible with the die and cast materials. 12. Faithfully reproduce the tissues of mouth. 13. Be able to be electroplated. CLASSIFICATION OF IMPRESSION MATERIALS There are several classifications: 32 According to Mode of Setting and Elasticiy Mode of Setting Rigid Elastic Set by chemical reaction (irreversible or thermoset).

The least dimensional change occurs when the impressions are stored in 100% humidity (for not more than one hour). However, prompt pouring of plaster or stone models is recommended. Working and Setting Time The working time ranges between 7-15 minutes and the setting time is about 5 minutes. Both can be controlled by regulating the flow of water through the cooling tubes. Since the cooling tubes are on the periphery, the material sets from the periphery towards the teeth surfaces. Tear and Compressive Strengths Agar has a tear strength of 715 gm/cm2 and compressive strength of 8000 gm/ cm2.

Sensitivity Sometimes, because of microleakage, the tooth remains sensitive even after placement of the filling. If the leakage is severe, bacterial growth occurs between the restoration and the cavity and even into the dentinal tubules. Toxic products liberated by such micro-organisms produce irritation to the pulp. Thermal Change Tooth structure and dental restorations are continually exposed to hot and cold beverages and foods. Instantaneous temperature fluctuation during the course of an average meal may be as great as 85°C.

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