Get your impression procedure under control Problem Incomplete reproduction of preparation margins
Voids on the margin
Margins not sharp
Improper syringe technique. Air bubbles in the syringe.
Working time exceeded, flowability already impaired.
Ŕ Keep the mix tip permanently immersed in the paste to avoid the formation of air bubbles Ŕ Apply a liberal amount of wash material into the sulcus. Start from the bottom up and cover the whole abutment tooth with syringing material. Always keep the tip in close proximity to the surface.
Ŕ Select material with sufficient working time. Make a choice depending on the individual situation and preference of material. Ŕ Do not exceed working times given in the instructions for use.
Possible causes Insufficient retraction. Blood and saliva contamination around preparation.
Solution Ŕ Retract gingival tissue to entirely capture the prepared area. Retraction cords as well as retraction pastes are suitable. Ŕ Rinse and dry the prepared area and stop any bleeding by using appropriate retraction technique and a haemostatic agent. Liquids or pastes based on aluminium chloride, aluminium sulphate, or iron sulphate are suitable haemostatic agents. 3M™ Astringent Retraction Paste supports your impression work with excellent gingiva retraction with or without cord and haemostasis.
3M™ Intra-oral Syringes Green (for VPS materials) and Purple (for polyether) are easy to handle and give better control of the syringing process.
3M™ Impregum™ Polyether Impression Material offers a very long working time with constant flow, ideal for large cases. For smaller cases, the “Super Quick” materials provide 45 seconds working time combined with a superfast 2-minute set time. Polyether impression materials in general are less temperature sensitive in its setting reaction than VPS materials. 3M™ Imprint™ 4 VPS Impression Material offers both a fast and a regular setting material. Select Quick Set for 1 to 2-unit cases and Regular Set for cases that involve 3 or more units.
3M™ Astringent Retraction Paste
3M™ Intra-oral Syringe
3M™ Imprint™ 4 VPS Impression Material
3M™ Impregum™ Polyether Impression Material
If you want to know how to avoid more problems and what is causing them, check out our full interactive trouble shooting guide.
3M Oral Care / 3M United Kingdom PLC Charnwood Campus, 10 Bakewell Road Loughborough LE11 5RB 0800 626 578 OralCareUK@mmm.com 3M.co.uk/Dental
3M, Imprint, Penta, Impregum are all trademarks of 3M Company. © 2023. All rights reserved.