Related Experiment Videos
[Optimization of the powder application in the Cerec method with environment-friendly propellant systems]
B J Meyer1, W H Mörmann, F Lutz
1Abteilung für Präventivzahnmedizin, Parodontologie und Kariologie, Universität Zürich.
Schweizer Monatsschrift Fur Zahnmedizin = Revue Mensuelle Suisse D'Odonto-Stomatologie = Rivista Mensile Svizzera Di Odontologia E Stomatologia
|January 1, 1990
Summary
This study evaluated six powder spraying methods for dental impressions. Propane-butane propellants and an air-flow system proved effective for optical impressions, offering alternatives to traditional methods.
Area of Science:
- Dentistry
- Dental Materials Science
- Digital Dentistry
Background:
- Accurate optical impressions are crucial for Cerec (Chairside Economical Restorations of Esthetic Ceramic) inlay fabrication.
- Powder application is a key step in achieving optimal surface detail for digital scanning.
- Evaluating different powder propellant systems is essential for clinical efficiency and material performance.
Purpose of the Study:
- To compare the effectiveness of six different powder propellant methods in creating uniform powder layers for optical impressions.
- To assess the powder layer thickness on various preparation surfaces (proximo-lateral walls, cavity floors, occlusal margins).
Main Methods:
- Sixty extracted human molars with MOD inlay preparations were used in vitro.
- Ten clinicians applied powder to one cavity each using six different methods.
- Powdered teeth were sectioned, and layer thickness was measured using a light microscope.
Main Results:
- Propane-butane propellants demonstrated effectiveness comparable to fluoridated hydrocarbons.
- A wet system, despite transient cooling, yielded good results.
- An air-flow system produced acceptable powder layers without chemical contamination.
Conclusions:
- Propane-butane propellants offer a viable alternative for powdering Cerec preparations.
- The air-flow system presents a safe and effective option for optical impression procedures.
- Optimizing powder application techniques can enhance the accuracy of digital dental impressions.