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Results for “Dental Instruments”

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At least 235 records · Page 13Linked to original sources
PubMed1990

An evaluation by scanning electron microscopy of small dental cutting instruments through use and cleaning.

The progressive status of some selected small dental cutting instruments was examined from the time of their unpackaging through routine institutionalized cleaning and sterilizing procedures both before and after first and subsequent use. The cleaning protocol in place at the time involved a phosphoric acid based detergent and ultrasonic cleaning. All assessments were made by scanning electron microscopy. It was found that new burs as unpackaged are unacceptable for use without first being subjected to a cleaning process and that the cleaning procedure utilized was ineffective and unsuitable. Also observed was the potential for gross contamination; the need for subsequent ultrasonic cleaning; and the different rate and nature of deterioration, with use, of the three bur types studied. This study has led to the introduction of modified procedures for the physical cleaning of small cutting instruments in our institution and confirms the usefulness of the scanning electron microscope in the ongoing practice of quality assurance.

Dental Instruments↗
PubMedDate not supplied

[Study on the causes for some characteristic damages of diamond instruments for dental practice].

An attempt has been made for investigation and classification of the causes for diamond instruments for dental practice resource decrease. The overheating of the instruments is considered to be the main cause and the plastic materials smudges and unstable fixing of the diamond grains--as accompanying causes. Taking in consideration the above mentioned factors could contribute to a more rational use of the diamond instruments for dental practice.

Carbon↗
PubMed2002

Some early dental extraction instruments including the pelican, bird or axe?

This paper is the result of the cataloguing, preparation for exhibition and the study of some early dental extraction instruments. The artefacts included elevators, pelicans, keys, forceps and pincers produced by unidentified makers or known firms. An evolutionary process is demonstrated from the simplest instrument leading to those used today. The naming of the artefacts follows a path relating to their method of use and to their appearance in regard to common everyday objects and animals or their parts. All were found to exhibit this association except the pelican which did not fit its long held position.

Dental Instruments↗
PubMed1992

Radiofrequency gas plasma (glow discharge) disinfection of dental operative instruments, including handpieces.

The radiofrequency-stimulated argon gas plasma (glow discharge) technique, already well-known for surface cleaning and activation of adhesion, was investigated for determination of its separate potential for rapid disinfection of dental operative instruments. Disinfection effectiveness was judged from diminished post-treatment recovery of viable organisms from the instruments agitated in saline. Streptococcus salivarius, Bacillus stearothermophilus, and Escherichia coli were used as primary contaminant organisms, dried from gelatin-thickened laboratory cultures onto the instruments and not subjected to any preliminary cleaning steps. Significant disinfection was obtained, with no sensible temperature increases, in under 10 minutes in laboratory apparatus consuming fewer than 5 Watts of power per cycle. Also, clinically used and deliberately-saliva-contaminated high-speed handpieces were gas-discharge-treated, with their resultant rapid disinfection noted by complete suppression of the viability of any transferred natural contaminant organisms within two minutes. With regard to preservation of instrument quality, it was also shown that this low-temperature gas-discharge method provides the noted substantial disinfection without deterioration of sharp edges. Work now in progress suggests that the method can provide cool, rapid, and complete sterilization when hydrogen peroxide vapors are present in the gas plasma used for treatment of instruments first given the normally recommended thorough pre-cleaning.

Argon↗