Lab Technique

Wheaton cosmetic dentist Bryan Bauer

Lost wax investment technique with teeth in a wax trial denture


  1. PMMA used since 1930’s polymethylmethacrylate
  2. Recent advancements is delivery of PMMA through injection molding
  3. In 2002 LC thermoplastic urethane-dimethacrylate resin

Advantage of urethane-dimethacryalte

  1. No monomer
  2. No flasking and packing
  3. Short processing times
  4. Less than half volumetric shrinking compared to PMMA
  5. Will bond to PMMA


  1. Sepcial equpiment required
  2. Mechanical retention required in teeth
  3. Learning curve