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    1. Home
    2. Products
    3. Crown and Bridgework (Metal)
    4. Metal Restorations

    Metal Restorations

     

     

    Fixed prostheses require alloys instead of pure metals as the pure metals do not have the needed physical properties to perform in these restorative situations.

    Benefits

    • Greater compressive and tensile strength than other materials
    • Minimal wear of surrounding teeth
    • Certified biocompatibility –  US IdentAlloy® certificates verify alloy status
    • Longevity and reliability
    • Long-term durability
    • Cast restorations protect remaining tooth structure
    • Excellent marginal integrity

    Considerations

    • Focus on long-term clinical performance of the chosen alloy.
    • Select alloys that suit the needs of the patient. Avoid “one size fits all” approach.
    • Consider Type II alloys for short-span bridges, single crowns, inlays, onlays and partial crowns.
    • Type IV alloys suit single crowns to large bridges and implant superstructures.
    • Composition of alloys will vary according to the constituents of the alloy:

    High noble content: (Au + Pt + Pd) ≥ 60% and Au ≥ 40%  
    Noble Metal content: (Au + Pt + Pd) ≥ 25%
    Base Metal: (Au + Pt + Pd) < 25%

     

    Alloy Properties

      Gold Non-precious Silver non-precious
    Material High noble/noble see chart see chart
    Aesthetics Limited Limited Limited - poor
    Durability ✓✓✓ ✓✓✓ ✓✓✓
    Margins chamfer chamfer chamfer
    Flexural strength 405-585 MPa 650 MPa 940 MPa
    Indications universal universal universal
    Colour yellow/white Rose pink/yellow Silver/white
    Bonding Can etch/bond Can etch/bond Can etch/bond
    Stain resistance ✓✓✓ ✓✓ ✓✓
    Span/ingot size Short span Short-long span Short-long span

    Alloy Indications

      Bonds To Porcelain Does Not Bond to Porcelain
      High Noble Noble Base
      IPS
    d.SIGN 96®    		 Degunorm® IPS
    d.SIGN 53®    		 Wirobond® Academy Gold™ Minigold® Harmony® 2
    Supplier IIVOCLAR VIVADENT DENTSPLY IVOCLAR VIVADENT BEGO IVOCLAR VIVADENT IVOCLAR VIVADENT IVOCLAR VIVADENT
    Materials & Metal Content Au 74% Au 74% Pd 54% Co 64% Au 77% Au 40% Pd 33%
    Type IV IV IV IV II IV III
    Inlays / Onlays ✓ ✓ ✓ ✓ ✓ ✓ -
    Partial crowns ✓ ✓ ✓ ✓ ✓ ✓ ✓
    Single crowns ✓ ✓ ✓ ✓ ✓ ✓ ✓
    PFM crowns ✓ ✓ ✓ ✓ - - -
    Telescope & conus crowns ✓ ✓ ✓ ✓ - ✓ ✓
    Root canal posts ✓ ✓ - ✓ - - ✓
    Short-span bridges ✓ ✓ ✓ ✓ ✓
    hardened    		 ✓
    hardened    		 ✓
    Long-span bridges ✓ ✓ ✓ ✓ - ✓ ✓
    Implant super-structures ✓ ✓ ✓ ✓ - - -
    Partial dentures ✓ ✓ ✓ ✓ - - -
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