JADA Continuing Education
Accuracy and dimensional stability of extended-pour and conventional alginate impression materials
Background. The authors conducted a study to determine if two irreversible hydrocolloid impression materials (Cavex ColorChange, Cavex Holland BV, Haarlem, Netherlands; Jeltrate Plus Antimicrobial Dustless Alginate Impression Material, Dentsply Caulk, Milford, Del.) stored for five days were dimensionally accurate.
Methods. The authors modified Ivorine teeth (Columbia Dentoform, Long Island City, N.Y.) on a Dentoform model (1560 series model, Columbia Dentoform) to allow measurements of tooth and arch width. They made impressions and generated casts immediately and at five additional times. They recorded tooth and arch widths on the casts and compared the measurements with those for the standard model.
Results. Compared with measurements for the model, the greatest measured difference in casts was 0.003 inches for Cavex ColorChange (extended-pour alginate) and 0.005 inches for Jeltrate Plus Antimicrobial Dustless Alginate Impression Material (conventional alginate). The percentage of dimensional change ranged from –0.496 to 0.161 percent for the extended-pour alginate and from –0.174 to 0.912 percent for the conventional alginate.
Conclusions. Results of analysis of variance and paired t tests indicated that when generated immediately and at day 5, casts produced from both impression materials were not statistically different from the standard model (P < .05).
Clinical Implications. When stored properly, both alginate materials can produce accurate impressions at day 5 for diagnostic casts and for fabrication of acrylic appliances.
Key Words: Alginate; impression; accuracy; syneresis; imbibition
Abbreviations: ADA: American Dental Association
I don't understand some of the Dental gargin, but hey very impressive if you ask me!!:)
3 comments:
That is seriously an accomplishment! Congrats. I LOVE your family picture. Seriously, you guys are way too cute. Thanks for the valentine, Carter loved it. I miss you guys and as we saw your picture in our Valentine Christian said,'Man, I miss those guys, I wish we could hang out with them.' You have such a cute fam. Tell Lily her hair is gorgeous and is so long!!
Wow! That's impressive! Rob asked what it was about. After I read the title, he said, "Boring!" But, I'm sure he would read it anyway.
Congrats Josh!!! That is so awesome.
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