An in vitro evaluation of the efficiency of an air-abrasion system using helium as a propellant
| Autor: | Avijit Banerjee, Timothy F. Watson, George Paolinelis |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Ceramics
animal structures Materials science Surface Properties Nozzle chemistry.chemical_element macromolecular substances Helium Dental Materials Materials Testing Aluminum Oxide Pressure Humans General Materials Science Composite material General Dentistry Propellant Enamel paint Air musculoskeletal neural and ocular physiology Volumetric flow rate Air Abrasion Dental Substrate (building) Aerosol Propellants chemistry Mechanics of Materials Air abrasion visual_art visual_art.visual_art_medium Powders Rheology Macor |
| Zdroj: | Dental Materials. 25:1442-1445 |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2009.06.017 |
| Popis: | Objectives Helium is currently used as a propellant gas for air-abrasion with manufacturer claims that this affords greater cutting efficiency compared to the use of air as a propellant. Higher cutting rates, when desired, can reduce operative times. This study set out to investigate these claims by comparing the rate at which helium propelled air-abrasion cut a standard enamel analogue, Macor ® , versus that of standard air propelled air-abrasion at different propellant pressures. Methods An enamel substitute, Macor ® , was used as the substrate in order to enable a greater control of physical variables. Powder flow rate, air abrasion nozzle distance and angle to the enamel substitute were constant throughout the experiments. The cutting efficiency of air and helium with propellant pressures of 20, 40, 60, 80 and 100 PSI were dynamically investigated, attempting to replicate clinical use. Results Helium air-abrasion was significantly more efficient in cutting the enamel analogue at all pressures, with a 40% increase for 100 PSI propellant pressure. Significance This finding suggests that air-abrasion units using helium as a propellant will be able to cut enamel more quickly in the clinical setting. |
| Databáze: | OpenAIRE |
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