PDL Palma Dental Laboratory logo
Palma Dental Laboratory
37 Industrial Park Road
Plymouth, MA 02360
Phone:
781-936-8718 or 508-591-7113
Toll free: 800-924-6025
Fax: 781-936-8719

Email: info@palmadentallaboratory.com

PDL-Brockton
478 Torrey Street #7
Brockton, MA. 02301
Phone: 508-588-8466
Fax: 508-588-3692

Email: office@palmadentallaboratory.com

We accept:

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Troubleshooting Impressions

The Perfect Impression:

  • No tearing of the wash from the putty around the prep
  • No burn-through of wash material on prep or adjacent teeth
  • Detailed and complete margins
  • No tooth contact with tray; impression centered on tray
  • Tray adhesive applied properly
  • Properly mixed material; no streaking
  • Strong bond between putty & wash materials; no signs of separation
  • No voids; full, smooth wash material coverage

Problem: Inadequate Margins
Probable Causes:

  • Inadequate retraction of sulcus around the prep
  • Moisture or bleeding around the prep
  • Too much time between mixing and seating
  • Rocking of tray to get proper seating

Problem: Contact with Tray
Probable Causes:

  • Wrong size/shape tray used
  • Tray not seated properly

Problem: Burn-Through of Wash Materials
Probable Causes:

  • Dimple in putty material is too small; must be deep and include teeth adjacent to all preparations
  • Not enough wash material
  • Tray seated too quickly/forcefully

Problem: Voids
Probable Causes:

  • Inadequate retraction of sulcus around the prep
  • Moisture or bleeding around prep
  • Too much time between mixing and seating
  • Improper syringing technique around prep; keep tip immersed and use stirring motion

Problem: Debonding
Probably Causes:

  • Contamination of Vaseline or balm used on syringe or lips
  • Glove contamination
  • Outdated/expired impression material

Problem: Ledges
Probable Causes:

  • Dimple in putty material is too small; must be deep and include teeth adjacent to all preparations.
  • Tray dislodges before material is fully set
  • Not enough wash material
  • Tray seated too quickly/forcefully

Problem: Inadequate Tray Adhesive
Probable Causes:

  • No/not enough tray adhesive
  • Incompatible/wrong manufacturer's adhesive
  • Inadequate drying time for adhesive
  • Disinfectant residue
  • Outdated/expired tray adhesive

Problem: Streaking
Probable Causes:

  • Improper amounts of base and catalyst
  • Inadequate mixing
  • Glove contamination

Problem: Tearing of Wash Material
Probable Causes:

  • Premature removal of tray from the mouth; inattention to recommended times.
  • Inadequate retraction of sulcus around the preparation.
  • Moisture or bleeding around the preparation.