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Voids on the Margin
Visual Appearance: Voids/holes on margin of the prepared teeth. Incomplete margin.
Result: The fit and function of the final restoration may be compromised. Short crown margins and/or open margins.
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Air trapped in intraoral syringe. |
- Properly bleed filled elastomer syringe.
- Keep tip immersed in material when loading syringe.
- Do not stop when in the middle of loading syringe.
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Air trapped while filling impression tray. |
- Keep mix tip immersed in tray material while filling the tray.
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Improper syringe technique. |
- Keep syringe tip immersed in wash material to avoid entrapping air.
- Wiggle and stir while syringing. Push material forward.
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Inadequate coverage of marginal area with light body impression material. |
- Use wash material liberally on preparation and abutments.
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Blood and saliva contamination around prep. |
- Use good moisture control technique. Rinse and dry prep area before taking the impression.
- Stop bleeding by using appropriate retraction technique and hemostatic agent. Leave cord in sulcus until no blood or saliva are present before syringing the light body impression material. Consider two-cord retraction to displace tissue and control fluids.
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| Tray not seated straight. |
- Insert impression tray straight.
- Ensure that correct centric bite is attained when using dual arch impression trays.
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| Exceeding the working time. |
- Follow manufacturer’s working time specifications.
- Choose material with longer working time.
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Impression material stored at elevated temperature. |
- Store impression material at room temperature.
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Customer Care
1 (800) 634-2249
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