Dimensional changes in alginate impression during immersion in a disinfectant solution

Area of Science:

• Dental Materials Science
• Impression Techniques
• Disinfection Protocols

Background:

• Alginate impression materials are widely used in dentistry.
• Disinfection of dental impressions is crucial for infection control.
• The dimensional stability of alginates can be affected by immersion in disinfectants.

Purpose of the Study:

• To evaluate the impact of a specific disinfectant (Perform ID) on the dimensional accuracy of two alginate materials.
• To compare the shrinkage of different alginate thicknesses after disinfection.

Main Methods:

• Standardized alginate impression samples (1.5mm and 3.0mm thickness) were prepared.
• Samples were immersed in Perform ID disinfectant for one hour.
• Linear dimensional changes were measured at 5-minute intervals using a travelling microscope.

Main Results:

• Both alginate materials exhibited linear shrinkage after disinfectant immersion.
• Thinner alginate samples (1.5mm) showed significantly greater shrinkage than thicker samples (3.0mm).
• Variable shrinkage patterns were observed between the two tested alginate brands (BluePrint Cremix and Hydrogum).

Conclusions:

• Disinfectant immersion can induce variable linear shrinkage in alginate impression materials.
• Alginate thickness significantly influences dimensional stability post-disinfection.
• The findings highlight the potential for distortion in clinical dental impressions due to disinfection processes.