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Frequently Asked Questions

Product
  • Eclipse
  • Al-Cote (Peeling)
  • Luci-Sof®
  • Lucitone® FRST
  • Lucitone® Fas Por+T
  • Densulate® Insulating Putty
  • Success® Injection System

    Triad
  • Breakage
  • Loss of Bond (Teeth, Reline, Repair)
  • Model Release Agent (MRA)
  • Air Barrier Coating (ABC)
  • Curing Triad® Materials
         Directly in Mouth
    		• Triad DuaLine
  • Cure system
  • Bond

    Denture Base
  • Porosity
  • Discoloration
  • Allergic Reaction
  • Microwave Curing
  • Trial Packing
  • Food Sticking
  • Should I Cure Right Away?
  • Occlusal Errors?
  • Denture Base Blanched With Reline
  • Denture is Orange Immediately
         After Deflasking
    		•  Teeth, General
  • Shade Conversion Chart
  • Lingualized Occlusion

    Porcelain Teeth
  • Breakage (Porcelain Teeth)
  • Staining (Porcelain Teeth)

    Plastic Teeth
  • "Pop-Off"
  • Breakage


    • Al-Cote (Peeling)

    Peeling is often caused by:
    1. Contamination of the gypsum surface by wax, oil, detergent.
      - A film is formed by chemical reaction when the Al-Cote contacts calcium in the gypsum investment. Any foreign substance on the surface of the mould inhibits or weakens the film formed.
    2. Applying Al-Cote when steam is still escaping from the mould.
    3. Applying excessive pressure during trial packing.
    4. The abrasive action of the acrylic as it flows out of the mould may loosen the separator film.



    Luci-Sof®

    Refer to "Troubleshooting Guide" for Luci-Sof.




    Lucitone® FRST

    Refer to print from form # 4252-B (Rev 2/00) - "Lucitone FRS Flexible Dental Resin Troubleshooting Guide".




    Lucitone® Fas Por+T

    Refer to "Troubleshooting Guide" for Fas Por+.




    Densulate® Insulating Putty

    Refer to "Troubleshooting Guide" for Densulate.




    Success® Injection System

    Refer to "Troubleshooting Guide" for Success Injection System.




    Triad - Breakage

    Breakage is usually caused by:
    1. Material not completely cured
      - Insufficient time - Turntable not at a level of optimum exposure
    2. Insuffcient thickness
      - 2.0mm minimum is needed - this should be in addition to the diameter of any wire or retentive area (doubling of thickness quadruples the strength).
    3. Rough or unpolished surface
      - The minute notches left by cutters or abrasive wheels may increase the possibility of fracture when pressure is applied.



    Triad - Loss of Bond (Teeth, Reline, Repair)

    Loss of bond is due to:
    1. Contamination of the bonding surface
    2. Insufficient bench-set
    3. Not curing Bonding Agent
    4. Check Bonding Agent for expiration
    5. Insufficient Triad VLC Material
      - 2.0mm minimum thickness of Triad between teeth and cast or existing denture



    Triad - Model Release Agent (MRA)

    Model Release Agent should be used as the separator on the model instead of other separators such as Al-Cote®. Other separators may not be sufficient in separating the Triad® material from the cast.




    Triad - Air Barrier Coating (ABC)
    1. Triad® materials will not cure completely in the presence of oxygen. It is necessary to paint the appliance as indicated in the directions for use with ABC to ensure a complete cure. Without ABC, the surface of the appliance will develop a "smear" layer of uncured material.
    2. Impression materials may not adhere to the Triad® tray materials unless the BC has been thoroughly washed off. We recommend using a toothbrush and warm soapy water to wash off the ABC.



    Triad - Curing Triad® Materials Directly in Mouth

    The only Triad® materials that have been approved for use directly in the mouth in the uncured state are the Triad® Reline Materials (Original Flow, High-Flow, ResilineT and DualineT) and Triad® Provisional Material.




    Triad DuaLine- Cure System

    Do not use light activation in the mouth. If light is used in the mouth, it can cause the cure to develop rapidly which can burn the adjacent tissue from the exothermic reaction.




    Triad DuaLine - Bond

    Bond is not achieved until light cured in the Triad® Curing Unit.




    Denture Base - Porosity

    Porosity with conventional methylmethacrylate materials (Lucitone 199®) is generally due to:
    1. Underpacking.
    2. Improper time or temperature control during cure.
    3. Incorrect monomer-polymer proportion
    4. Insufficient pressure during the curing process.
    5. Insufficient packing pressure due to insufficient material in mould (underpacking)
    6. Air entrapped into the mass during mixing
    7. Material packed before proper gelation or packed after too long a gelation period
    8. Improper curing time and/or temperature
    Bench setting is recommended (30 minutes) especially for thick lower cases.




    Denture Base - Discoloration

    Discoloration is usually caused by contamination of the mould and/or cast The following can lead to discoloration of the denture base:
    1. Water (left in the mold during packing)
    2. Wax (not properly boiled out)
    3. Oil (from certain separators)
    4. Wax solvent
    5. Detergents (avoid using liquid detergents and/or powdered detergents that contain additives like coloring agents, scents, bleaches, etc.)
    6. Excessive amounts of separator, or wet (incompletely dried enough) separator
    7. Exposure to cleaning solutions, solvents, bleaches, alcohol, etc.
    8. Certain impression materials may affect the surface of the cast
    9. Patient medications have been shown to effect denture discoloration



    Denture Base - Allergic Reaction

    A rare reaction to an "allergen" that may range from a mild rash or itching/burning to a life-threatening condition. Confirmed allergies to denture materials usually involve local reactions of mucous membranes. Alternatives include the Eclipse® Prosthetic Resin System (urethane oligomer), Lucitone FRS (nylon material), or Triad (urethane dimethacrylate). Vulcanite is another alternative although it is difficult to find. Some polycarbonate and vinyl materials (Astron1180) claim low allergic potential.




    Denture Base - Microwave Curing

    See Technique Highlight Sheet




    Denture Base - Trial Packing

    Trial packing a minimum of 3 times is always recommended for conventional methylmethacrylate materials (Lucitone 199). Trial packing reduces the possibility of changes in vertical dimension after curing.




    Denture Base - Food Sticking

    Can occur with a new denture, but food will stick less over time. Perhaps shape and wetting (saliva) contribute to the problem.




    Denture Base - Should I Cure Right Away?

    Leave conventional methylmethacrylate materials (Lucitone 199) under pressure 30 minutes before cure. This allows time to bond to denture teeth, allows time to equalize pressures in the flask, and reduces the chance of porosity in large or thick cases.




    Denture Base - Occlusal Errors?

    For conventional methylmethacrylate materials (Lucitone 199), this is usually due to:
    1. Too much material
    2. Use of Plaster. Excessive pressure
    3. Type III dental stone is recommended. Do not use plaster.
    4. Packing or injecting at improper gelation.



    Denture Base - Denture Base Blanched With Reline

    Cured Lucitone 199 may blanch when boiled. An insulating material such as TrixaT Laboratory Matrix Putty or Dentsulate® is recommended when flasking.




    Denture Base - Denture is Orange Immediately After Deflasking

    Polymer may have been overheated during storage. Recommended temperature for storage is 60-80°F. Also, check product expiration date.




    Teeth, General - Shade Conversion Chart

    Click here for pdf of Shade Conversion Chart, Item #4155-E.




    Teeth, General - Lingualized Occlusion

    This may be accomplished by using any combination of Trubyte posteriors with the upper having a higher cusp angle than the lower. See the booklet: "Suggested procedures for the arrangement and articulation of Trubyte Anterior and Posterior Teeth" (#4087-A) or "Occlusal Options" literature (#4300-C) for more details.

    Also shown in this book is Portrait Euroline 40º Posteriors, a highly anatomical tooth, that works well in lingualized occlusion set ups. Its wide table and young cuspal design allows maximum cutting efficiency with bilateral balanced occlusion.




    Porcelain Teeth - Breakage

    Breakage in porcelain teeth is usually caused by:
    1. Leverage
    2. Impact
    3. Thermal Shock
    See Technical Bulletin "Porcelain Denture Teeth - Uses and Abuses" (#3337-A).




    Porcelain Teeth - Staining

    Trubyte® porcelain denture teeth may be characterized with porcelain stains that fire at 1300 F to 1650 F plus a 1 minute hold.




    Plastic Teeth - "Pop-Off"

    "Pop-Offs" are generally caused by:
    1. Contamination of the bonding surface by wax, oil (even oil from your hands), detergent, wax solvent, and/or separator.
    2. Incorrect monomer-polymer proportion.
    3. Material packed after too long after recommended gelation.
    Suggestions for success include:
    1. Remove the glaze from the ridgelap of the teeth to enhance the bond to the denture base.
    2. Mix denture base material in a container with a lid intact while gelation occurs to prevent monomer evaporation.
    3. Trial pack or inject when the material has reached a soft dough consistency.
    4. Once the "snap" stage has been reached, there may not be sufficient monomer available to adequately bond the plastic teeth to the denture base.
    5. Allow the flask to remain under pressure for 30 minutes prior to starting the cure cycle. This will give the monomer more time to develop a better bond.



    Plastic Teeth - Breakage

    Breakage is usually caused by:
    1. Leverage
    2. Impact



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