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Introducing a Novel Paper Point Method for Isolated Apical Sampling-The Controlled Apical Sampling Device: A

Christoph Matthias Schoppmeier1, Gustav Leo Classen1, Silvia Contini2

  • 1Polyclinic for Operative Dentistry and Periodontology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50923 Cologne, Germany.

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A novel controlled apical sampling (CAPS) device effectively collects endodontic samples. This protected paper point method shows promise for accurate microbial diagnostics in root canal infections.

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3D-printed tooth modelapical periodontitisendodontic microbiologymicrobial samplingroot canal microbiome

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Area of Science:

  • Endodontics
  • Microbiology
  • Dental Device Innovation

Background:

  • Accurate microbial sampling is crucial for diagnosing and treating endodontic infections.
  • Existing methods may face challenges in obtaining representative samples from the apical region.

Purpose of the Study:

  • To introduce and evaluate a novel protected paper point device for apical lesion sampling.
  • To assess the effectiveness and robustness of this device in vitro for endodontic microbiology.

Main Methods:

  • A prototype device, adapted from the Micro-Apical Placement System, was developed.
  • The device utilizes a screw head, hollow tube, internal piston, and standardized paper points for sample collection.
  • In vitro testing involved 3D-printed tooth models inoculated with *Staphylococcus epidermidis* and *Escherichia coli*.

Main Results:

  • The controlled apical sampling (CAPS) prototype demonstrated straightforward and reproducible handling.
  • Sterility controls confirmed the absence of contamination in the setup.
  • The CAPS device successfully collected apical samples free from contamination in 86.67% of trials.

Conclusions:

  • The CAPS method offers a precise and effective approach for sampling *Staphylococcus epidermidis* in apical lesions.
  • The device's user-friendly design and consistent performance suggest potential for clinical application in endodontic microbiology.
  • This tool may enhance microbial diagnostics and inform patient-specific endodontic treatment strategies.