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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

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Published on: January 19, 2016

Linear dimensional stability of elastomeric impression materials over time.

Analía B Garrofé¹, Beatriz A Ferrari, Mariana Picca

¹Department of Dental Materials, School of Dentistry, University of Buenos Aires, Argentina. analiagarrofe@gmail.com

Acta Odontologica Latinoamericana : AOL

|May 4, 2012

Summary

This summary is machine-generated.

Time significantly impacts the linear dimensional stability of elastomeric impression materials. This study evaluated polyvinylsiloxane and polydimethylsiloxane materials over 14 days, finding time to be a critical factor.

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Area of Science:

Materials Science
Dental Materials Science
Polymer Science

Background:

Accurate dental impressions are crucial for prosthodontic restorations.
Dimensional stability of elastomeric impression materials is vital for clinical success.
Variations in material composition and setting time can influence dimensional accuracy.

Purpose of the Study:

To evaluate the linear dimensional stability of different elastomeric impression materials over time.
To compare the dimensional changes of polyvinylsiloxane and polydimethylsiloxane impression materials.
To determine the effect of time intervals on the accuracy of dental impressions.

Main Methods:

A metal mold with custom trays was used to fabricate impressions.
Three polyvinylsiloxane (Examix-GC, Aquasil-Dentsply, Panasil-Kettenbach) and three polydimethylsiloxane (Densell-Dental Medrano, Speedex-Coltene, Lastic-Kettenbach) materials were tested.
Digital photography and image analysis software were employed to measure dimensional changes at various time points up to 14 days.

Main Results:

All tested elastomeric impression materials exhibited changes in linear dimensions over the 14-day observation period.
Both material type and elapsed time were found to have statistically significant effects on dimensional stability.
Specific materials showed varying degrees of dimensional change, with some exhibiting more stability than others.

Conclusions:

Time significantly affects the linear dimensional stability of elastomeric impression materials.
Clinicians should consider the time-dependent dimensional changes when selecting impression materials for dental procedures.
Further research may be warranted to explore long-term stability and factors influencing dimensional accuracy.