Examinando por Materia "Microbiological contamination"

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Acceso abierto
Degree of microbial contamination on the surface of a high-speed handpiece after an operating procedure at the dental clinic of the Private University Norbert Wiener, Lima 2019
(Universidad Privada Norbert Wiener, 2019-07-02) Gutiérrez Anicama, Fernando Adolfo; Ordoñez Lopez, Carmen Jenny
The general objective of this research work was to determine the degree of microbiological contamination on the surface of a high-speed handpiece after a surgical procedure in the treatment of patients attending the dental clinic of the Universidad Privada Norbert Wiener. For this purpose, 52 high-speed handpieces were evaluated, and swabs were taken from the handle and head of each handpiece. The samples were placed in various test tubes containing 1 ml of peptone water, which were then transported to the microbiology laboratory for inoculation onto petri dishes to assess the Colony Forming Units (CFU) present in the sample. The results revealed that the microbiological contamination on the head of the handpiece was 182.69 ± 187.47 CFU, while the handle showed 176.92 ± 189.55 CFU. Furthermore, 51.9% of the heads of high-speed handpieces showed microbial contamination, as did 50% of the handles. Additionally, 51.9% of the high-speed handpieces were contaminated with bacteria, while the remaining 48.1% showed no contamination from any microorganisms. The study concluded that the degree of microbiological contamination on the surface of the high-speed handpiece (both head and handle) following a surgical procedure in the dental clinic of the Universidad Privada Norbert Wiener in Lima, 2019, was high.
Acceso abierto
Level of microbiological contamination in radiological equipment before, during and after taking intraoral radiographs in the radiology room of the Norbert Wiener University
(Universidad Privada Norbert Wiener, 2023-09-05) Saavedra Contreras, Betzabe Giovanna; Rojas Ortega, Raúl Antonio
The objective of this research was to determine the level of microbiological contamination on radiographic equipment before, during, and after the taking of intraoral radiographs in the radiology room at the Universidad Norbert Wiener. The methodology used was descriptive, longitudinal, prospective, and quantitative with an applied focus. The population consisted of 3 radiographic units, with a total of 54 swab repetitions (18 before, 18 during, and 18 after the shift). The sampling was non-probabilistic with intentional selection, as the repetitions on each unit made up the sample. The technique used in this research was direct observation. Swabbing was performed on the designated surfaces of the X-ray equipment, and the samples were taken from different parts of the equipment. The Kruskal-Wallis statistical test was applied with a significance level of 5%. The results showed that there was greater microbiological contamination after the radiographic procedure, with Bacillus G-, Cocci G+, and Staphylococcus G+ having a mean of 18.10555 x 10^7 CFU/ml, followed by Bacillus G-, Cocci G+, and Streptobacilli G- with a value of 14.68777 x 10^7 CFU/ml after the procedure. As for fungi, higher contamination was observed before the radiographic procedure at 2.5555 x 10^7 CFU/ml. However, no significant differences were found in microbiological contamination on the radiographic equipment before, during, or after the taking of intraoral radiographs (p > 0.05).