Finn forfatter "Valen, Håkon"

Viser treff 1-9 av 9

  • Adhesion of Escherichia Coli to Nanostructured Surfaces and the Role of Type 1 Fimbriae 
    Kallas, Pawel; Haugen, Håvard Jostein; Gadegaard, Nikolaj; Stormonth-Darling, John; Hulander, Mats; Andersson, Martin; Valen, Håkon (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Bacterial fimbriae are an important virulence factor mediating adhesion to both biotic and abiotic surfaces and facilitating biofilm formation. The expression of type 1 fimbriae of Escherichia coli is a key virulence factor ...
  • Antibacterial Activity of Root Repair Cements in Contact with Dentin—An Ex Vivo Study 
    Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Kapralos, Vasileios; Camilleri, Josette; Sunde, Pia Titterud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    This study assessed the antibacterial characteristics of the dentin/material interface and dentin surfaces exposed to experimental hydraulic calcium silicate cement (HCSC) with or without bioactive glass (BG) replacement ...
  • Effect of chlorhexidine digluconate on antimicrobial activity, cell viability and physicochemical properties of three endodontic sealers 
    Kapralos, Vasileios; Sunde, Pia Titterud; Camilleri, Josette; Koutroulis, Andreas; Ørstavik, Dag Solmund; Valen, Håkon (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Objective Assess the biological and physicochemical properties of AH Plus, BioRoot RCS and Pulp Canal Sealer (PCS) leachates with and without chlorhexidine (CHX). Methods The sealers were studied in no contact and ...
  • Effect of exposure conditions on chemical properties of materials for surgical endodontic procedures 
    Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Kapralos, Vasileios; Camilleri, Josette; Sunde, Pia Titterud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract This study investigated the role of aging and changes in environmental conditions on selected properties of a prototype radiopacified calcium silicate‐based cement (TZ‐base) with or without incorporation of silver ...
  • Effect of silica nano-spheres on adhesion of oral bacteria and human fibroblasts 
    Kallas, Pawel; Valen, Håkon; Haugen, Håvard Jostein; Andersson, Martin; Hulander, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Objective This study investigated the effect of surface nano-patterning on adhesion of an oral early commensal colonizer, Streptococcus mitis and the opportunistic pathogen Staphylococcus aureus and human fibroblasts (HDFa) ...
  • Endodontic sealers after exposure to chlorhexidine digluconate: An assessment of physicochemical properties 
    Kapralos, Vasileios; Camilleri, Josette; Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Sunde, Pia Titterud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Objectives Final root canal irrigation should ideally maintain the physicochemical stability of root canal sealers. We seek to assess the effect of contact with 2% chlorhexidine digluconate (CHX) on the physicochemical ...
  • Protein-coated nanostructured surfaces affect the adhesion of Escherichia coli 
    Kallas, Pawel; Valen, Håkon; Hulander, Mats; Gadegaard, Nikolaj; Stormonth-Darling, John; O'Reilly, Padraic; Thiede, Bernd; Andersson, Martin; Haugen, Håvard Jostein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Developing new implant surfaces with anti-adhesion bacterial properties used for medical devices remains a challenge. Here we describe a novel study investigating nanotopography influences on bacterial adhesion on surfaces ...
  • Surface characteristics and bacterial adhesion of endodontic cements 
    Koutroulis, Andreas; Valen, Håkon; Kapralos, Vasilis; Ørstavik, Dag Solmund; Camilleri, Josette; Sunde, Pia Titterud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Objectives To investigate the effect of inclusion of silver nano-particles (SNP) or bioactive glass (BG) on the surface characteristics and bacterial adhesion of prototype tricalcium silicate ...
  • The dentine-sealer interface: Modulation of antimicrobial effects by irrigation 
    Kapralos, Vasileios; Valen, Håkon; Koutroulis, Andreas; Camilleri, Josette; Ørstavik, Dag Solmund; Sunde, Pia Titterud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Aim Assess whether sodium hypochlorite (NaOCl) or chlorhexidine (CHX) and two irrigation protocols may alter the antibacterial properties of dentine and three endodontic sealers using a novel ex vivo tooth model. Met ...