1 Fabricating Temporary Restorations DA122 Dental Materials

2 Provisional Crowns: Also known as temporary crowns –worn over the prepped tooth while the permanent crown is being fabricated in the dental lab Why? It is necessary for many reasons: –To protect the tooth from damage –To provide coverage to prevent sensitivity –To prevent drifting –To prevent hyper-eruption –To prevent gingival overgrowth –To prevent injury or irritation to the gingiva Also known as temporary crowns –worn over the prepped tooth while the permanent crown is being fabricated in the dental lab Why? It is necessary for many reasons: –To protect the tooth from damage –To provide coverage to prevent sensitivity –To prevent drifting –To prevent hyper-eruption –To prevent gingival overgrowth –To prevent injury or irritation to the gingiva

3 Some Basic Armamentarium: Extruder Gun with Resin cartridge Surgical scissors Vaseline Cotton tipped applicators Slow speed handpiece Trimming and polishing burs Sand paper discs Matrix made from original unprepped tooth Articulating paper/ holder Mirror, explorer, spoon excavator Temporary Cement Extruder Gun with Resin cartridge Surgical scissors Vaseline Cotton tipped applicators Slow speed handpiece Trimming and polishing burs Sand paper discs Matrix made from original unprepped tooth Articulating paper/ holder Mirror, explorer, spoon excavator Temporary Cement

4 Temporary Crown Tray Set-up

5 There are many ways to make a Temporary: Acrylic Monomer (powder and liquid) Bis-acryl Resin based temporary material Preformed temporary shells Polycarbonate temporaries Acrylic Monomer (powder and liquid) Bis-acryl Resin based temporary material Preformed temporary shells Polycarbonate temporaries

6 Basic procedure: Form a matrix on patient’s tooth before prepping with alginate A quadrant impression can be taken if tooth structure is not lost After final impression is taken, use matrix and place whichever material you choose in the area of prepped tooth Place impression accurately over the prepped tooth Form a matrix on patient’s tooth before prepping with alginate A quadrant impression can be taken if tooth structure is not lost After final impression is taken, use matrix and place whichever material you choose in the area of prepped tooth Place impression accurately over the prepped tooth

7 Basic procedure: After specified manufacturer’s time, remove from mouth carefully Remove from matrix, and trim excess from margins, using a lab bur or disc Remove excess from contacts, which will allow temp to seat better (be careful not to open contact though!) Now, try temp on prepped tooth, adjustments may still be necessary After specified manufacturer’s time, remove from mouth carefully Remove from matrix, and trim excess from margins, using a lab bur or disc Remove excess from contacts, which will allow temp to seat better (be careful not to open contact though!) Now, try temp on prepped tooth, adjustments may still be necessary

8 Basic procedure: Check the occlusion with articulating paper. Any dark blue spots on occlusal surface need to be removed to prevent sensitivity Once occlusion is complete, polish temporary Cement in place, remove excess cement, and give patient post-op instructions Check the occlusion with articulating paper. Any dark blue spots on occlusal surface need to be removed to prevent sensitivity Once occlusion is complete, polish temporary Cement in place, remove excess cement, and give patient post-op instructions

9 Post-Op instructions: The temporary should remain in place for 2-4 weeks Instruct patient to: –Floss by sliding floss through contact –Not eat anything crunchy, sticky or chewy –Rinse with warm salt water to sooth irritated gums –Take Ibuprophen or Tylenol to help w/ sensitivity (this should be said by the dentist) –Call the office if you have any problems: If temp falls off Do you have the temp? The temporary should remain in place for 2-4 weeks Instruct patient to: –Floss by sliding floss through contact –Not eat anything crunchy, sticky or chewy –Rinse with warm salt water to sooth irritated gums –Take Ibuprophen or Tylenol to help w/ sensitivity (this should be said by the dentist) –Call the office if you have any problems: If temp falls off Do you have the temp?

10 Words to know: Polymerization: reaction that allows the material to set or cure. Can be light cure, self cure or dual cure Flash: thin layer of mixture extending our beyond the gingival line Margin: edge of temporary crown that fits into the gingival sulcus Seat: placing the temporary crown over the prep completely Polymerization: reaction that allows the material to set or cure. Can be light cure, self cure or dual cure Flash: thin layer of mixture extending our beyond the gingival line Margin: edge of temporary crown that fits into the gingival sulcus Seat: placing the temporary crown over the prep completely