Materials for Inlays, Onlays, Crowns and Bridges

Inlay – indirect restoration; occlusal surface excluding cusps

Onlay – indirect restoration; occlusal surface plus cusp(s)

Crown – usually covers the clinical crown of the natural tooth Can create “¾ crowns”

Bridge – replaces missing tooth/teeth Abutment vs. Pontic Cantilever, Maryland

Cantilever Bridge

Maryland Bridge

Dental Ceramics – Porcelains Composites Metals

Crowns (Anterior – “jackets”) Veneers Fused to metal for crowns & bridges Denture teeth Inlays & Onlays All-porcelain crowns & bridges (without metal

substructure)

Intended for very large Class I or II restorations Applied directly or indirectly Reduces concern of polymerization shrinkage and

marginal leakage Composite restoration fully cured outside of mouth Similar to direct composite materials

The tooth is prepared The prep-site is lined with a lubricant The composite is placed and cured (but

not etched, bonded!) Remove the composite filling and finish

cure The restoration is cemented into prep at

same appointment

After tooth is prepped, an impression is taken A provisional filling material is placed The impression is sent to lab Lab fabricates the restoration from composite material

onto the die The restoration is cured fully The inlay is seated with composite cement at 2nd

appointment

Full metallic crowns, bridges Inlays, onlays Substructure for PFM’s Substructure/framework for partial dentures Temporary crowns (prefabricated)

Alloys have advantages over pure metals alone: Stronger Harder Easier to fabricate Less expensive

Alloys are formed when metallic atoms are dissolved within the atoms and crystals of another metal

Gold is a soft metal Less gold in alloy improves

strength ADA-approved classes

based on properties of alloy Mixed with platinum,

palladium, copper & silver Gold alloys are expensive

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