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Dental Materials Primer
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Amalgam
Properties: Durable, good wear resistance. Uses: Filling cavities. Handling: Requires proper mixing and compaction, avoid inhalation of mercury vapor.
Polycarboxylate Cement
Properties: Moderate strength, biocompatible. Uses: Luting agents, base under restorations. Handling: Mix on a cool glass slab, work quickly before it sets.
Glass Ionomer Cement
Properties: Bonds chemically to dental hard tissues, releases fluoride. Uses: Filling material, luting cement. Handling: Must be mixed accurately, avoid desiccation.
Dental Bleaching Agents
Properties: Oxidizing agents, can cause tooth sensitivity. Uses: Whitening of discolored teeth. Handling: Apply as per manufacturer's instructions, avoid contact with gums, use with proper isolation.
Zinc Oxide Eugenol
Properties: Sedative effect on pulp, antiseptic. Uses: Temporary fillings, dental impressions. Handling: Mix paste or powder/liquid forms, ensure correct ratio to achieve desired setting time.
Dental Porcelain
Properties: Biocompatible, hard, brittle. Uses: Crowns, veneers, inlays, onlays. Handling: Requires careful handling to prevent fracture, fired in a kiln.
Gold Alloys
Properties: High corrosion resistance, malleability. Uses: Crowns, bridges, inlays. Handling: Cast in a dental lab, polished to high shine.
Zirconia
Properties: High fracture toughness, biocompatible. Uses: Ceramic crowns, bridges, implant abutments. Handling: Precise milling required, sintering at high temperature.
Stainless Steel
Properties: High durability, corrosion resistant. Uses: Orthodontic wires, crowns, implant components. Handling: Can be bent and shaped, keep polished to maintain corrosion resistance.
Resin-Modified Glass Ionomer
Properties: Improved physical properties over traditional glass ionomer, releases fluoride. Uses: Filling material, especially in non-stress bearing areas. Handling: Light-cure or dual-cure systems available, maintain isolation from moisture.
Silver Diamine Fluoride
Properties: Antimicrobial, desensitizing agent. Uses: Treat and prevent dental caries, reduce tooth sensitivity. Handling: Applied topically, be cautious to avoid staining soft tissues.
Orthodontic Elastomerics
Properties: Elastic, colorful, comes in various sizes and strengths. Uses: Apply forces to teeth in orthodontics, ligatures, separators. Handling: Stretch before application, change periodically as they lose elasticity.
Dental Ceramics
Properties: Esthetic, high compressive strength. Uses: Inlays, onlays, crowns, veneers. Handling: Requires accurate impression and shade selection, delicate handling before cementation.
Ceramic-Metal (PFM) Alloys
Properties: Strong metal substructure, esthetic ceramic layer. Uses: Crowns and fixed bridges. Handling: Requires layering and firing of ceramic onto the metal substructure, technical skill in dental labs needed.
Silicone Impression Materials
Properties: Accurate detail reproduction, good dimensional stability. Uses: Making accurate dental impressions for crowns, bridges, and prosthodontics. Handling: Mix base and catalyst, avoid trapping air bubbles, disinfect after use.
Gutta-Percha
Properties: Biocompatible, pliable at higher temperatures. Uses: Filling root canals. Handling: Heated before insertion, compacted to seal the root canal.
Dental Waxes
Properties: Malleable at room temperature, low melting point. Uses: Modeling in restorative procedures, denture bases. Handling: Avoid overheating, handle gently to prevent distortion.
Dental Impression Materials
Properties: Varies; can be elastic or rigid, accurate reproduction of oral structures. Uses: Creating replicas of teeth and soft tissues. Handling: Mix according to manufacturer's instructions, timely pouring of models.
Cobalt-Chromium Alloys
Properties: Hard, resistant to corrosion and wear. Uses: Removable partial denture frameworks, crowns. Handling: Requires precise casting and finishing in dental labs.
Temporary Restorative Materials
Properties: Easy to shape and remove, limited durability. Uses: Temporary fillings and crowns during treatment. Handling: Avoid chewing on the material, maintain oral hygiene to prevent leakage.
Fluoride Varnishes
Properties: Concentrated topical fluoride, hardens on contact with saliva. Uses: Preventing dental caries, treating tooth sensitivity. Handling: Dry the tooth surface, brush on thinly, instruct patient not to eat or drink for 30 minutes.
Composite Resins
Properties: Esthetic, bond to tooth structure. Uses: Tooth-colored fillings, veneers. Handling: Keep dry until cured, light-curing is required.
Titanium
Properties: High strength, biocompatible, corrosion-resistant. Uses: Dental implants, abutments. Handling: Requires precise machining, clean thoroughly before implantation.
Nickel-Chromium Alloys
Properties: High strength, resists tarnishing. Uses: Metal frameworks for removable dentures, fixed prosthodontics. Handling: Cast in a dental lab, can cause allergic reactions.
Calcium Hydroxide
Properties: Encourages dentinal regeneration, antimicrobial. Uses: Pulp capping, liner under restorations. Handling: Apply carefully to avoid excess, protect from oral fluids.
Acrylic Resins
Properties: Easy to manipulate, esthetic. Uses: Denture bases, temporary crowns. Handling: Monomer liquid is mixed with polymer powder, requires proper polymerization.
Bioactive Glass
Properties: Bonding to bone and teeth, stimulates healing. Uses: Bone grafts, regenerative procedures, and as a filler material. Handling: Handle as a sterile material, often mixed with a gel carrier.
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