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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
- Tray movement after it ahs been seated
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Voids
Probable Causes
- Inadequate retraction of sulcus around the prep
- Moisture or bleeding around the prep
- Too much time between mixing and seating
- Improper syringing technique around prep; keep tip immersed
and use stirring motion
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Debonding
Probable Causes
- Contamination of vaseline / balm used on syringe or lips
- Glove contamination
- Outdated / expired impression materials
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Contact With Tray
Probable Causes
- Wrong size / shape tray used
- Tray not seated properly
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Ledges
Probable Causes
- Dimple in putty material is too small; must be deep and
include teeth adjacent to all preps
- Tray dislodges before material fully set
- Not enough wash material
- Tray seated too quickly / forcefully
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Inadequate Tray Adhesive
Probable Causes
- No / Not enough tray adhesive
- Incompatible / Wrong manufacturer's adhesive
- Inadequate drying time for adhesive
- Outdated / expired tray adhesive
- Disinfectant residue
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Burn Through of Wash Material
Probable Causes
- Dimple in putty material is too small; must be deep and
include teeth adjacent to all preps
- Not enough wash material
- Tray seated too quickly / forcefully
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Tearing of Wash Material
Probable Causes
- Premature removal of tray from the mouth; inattention
to recommended times
- Inadequate retraction of sulcus around the prep
- Moisture or bleeding around the prep
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Streaking
Probable Causes
- Improper amounts of base and catalyst
- Inadequate mixing
- Glove contamination
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