Hygiene (Mar 2025)

In Vitro Analysis of Cross-Contamination and Disinfection Methods of Prosthetic Components Coming from Laboratories

  • Carlos Braga,
  • Elken Gomes Rivaldo,
  • Arthur Saavedra de Paula,
  • Rim Bourgi,
  • Louis Hardan,
  • Naji Kharouf,
  • Mohammad Qaddomi,
  • Youssef Haikel,
  • Celso Afonso Klein-Junior

DOI
https://doi.org/10.3390/hygiene5010009
Journal volume & issue
Vol. 5, no. 1
p. 9

Abstract

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The customization and handling of implant abutments in prosthetic laboratories can lead to microbial contamination, requiring disinfection before clinical use. This study evaluated cross-contamination in abutments from three prosthetic laboratories, identifying microorganisms and assessing the disinfection efficacy of 2% chlorhexidine digluconate (2% CL) and ultraviolet C (UV-C) radiation. Sixty abutments were analyzed, with contamination detected in 83%, predominantly Enterococcus faecalis (34.2%) and Staphylococcus epidermidis (17.8%). Post-disinfection, CFU reduction was 92% (UV-C) and 93% (CL), confirmed by the Wilcoxon test (Z = −4.373; p p > 0.05). These findings confirm that both UV-C and CL effectively reduce microbial load, providing reliable disinfection protocols for clinical practice.

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