Welcome to NIOM
Dear clients
We would like to inform you that NIOM is operational and carrying out scheduled test activities. We support, and follow, the national guidelines regarding the COVID-19 outbreak. Precautions are taken to ensure sustainable safeguards for our staff members and activities.
Dear dental teams
Our services are operational. You may continue to direct any clinically relevant questions regarding use and selection of dental materials to us. As the Nordic competency center of dental materials, we are here to help.
Any changes caused by the current situation will be posted on our website.
NEWS
Tooth bleaching webinar out now
Professor Jon E. Dahl talks about tooth bleaching in this new webinar from NIOM. Valid for continuing education points.
New dental technician at NIOM
NIOM is proud to announce that Heidi Vanessa Holm has joined our staff. She is a graduate of Oslo Metropolitan University, where she specialized in fixed prosthetics. Holm with guest researcher Qalbi Khan at NIOM, in Oslo. - I am grateful, and happy to be joining...
Ledig stilling: FORSKER – MIKROBIOLOGI
Ledig stilling for forsker innen mikrobiologi hos NIOM i Oslo. Søker må ha relevant utdannelse på master- eller PhD. nivå.
NEWSLETTERS
Antibacterial effect of CHX as final irrigant
Antibacterial effect of CHX as final irrigant The study was a collaboration between NIOM, The University of Oslo and the University of Birmingham, UK . CHX...
End of year greeting
The truly unusual year 2020 is drawing to a close. NIOM’s services have been operational throughout the year thanks to our dedicated staff.
Cell line affects the results of toxicity studies
The choice of cell line is of no small matter when conducting in vitro studies. A recent NIOM study has shown how differently five cell lines reacted, although consistently so, when testing for their interaction with two methacrylates. The message is that the choice of cell line will largely affect the results obtained.
Harmful compound found in charcoal toothpaste
A new NIOM study found the toxic compound naphthalene in a charcoal toothpaste, raising questions about the safety of such products.
Deviations in the composition of alloys
A recent NIOM study revealed several irregularities in single dental crowns. The PFM or porcelain-fired-on-metal crowns had been ordered from laboratories both within and outside of Norway.
Fabrication techniques and ion release in cobalt-chromium alloys
A recent study tested the behaviour of cobalt-chromium alloys under corrosive conditions mimicking the acidity observed in oral biofilm. Cobalt-chromium has become the alloy of choice for the framework of porcelain-fixed-to-metal (PFM) prosthetics also in combination with titanium implants. The alloy specimens were fabricated by both traditional casting, by milling and by laser melting and sintering.
NEWSLETTERS
Antibacterial effect of CHX as final irrigant
Antibacterial effect of CHX as final irrigant The study was a collaboration between NIOM, The University of Oslo and the University of Birmingham, UK . CHX...
End of year greeting
The truly unusual year 2020 is drawing to a close. NIOM’s services have been operational throughout the year thanks to our dedicated staff.
Cell line affects the results of toxicity studies
The choice of cell line is of no small matter when conducting in vitro studies. A recent NIOM study has shown how differently five cell lines reacted, although consistently so, when testing for their interaction with two methacrylates. The message is that the choice of cell line will largely affect the results obtained.
Harmful compound found in charcoal toothpaste
A new NIOM study found the toxic compound naphthalene in a charcoal toothpaste, raising questions about the safety of such products.
Deviations in the composition of alloys
A recent NIOM study revealed several irregularities in single dental crowns. The PFM or porcelain-fired-on-metal crowns had been ordered from laboratories both within and outside of Norway.
Fabrication techniques and ion release in cobalt-chromium alloys
A recent study tested the behaviour of cobalt-chromium alloys under corrosive conditions mimicking the acidity observed in oral biofilm. Cobalt-chromium has become the alloy of choice for the framework of porcelain-fixed-to-metal (PFM) prosthetics also in combination with titanium implants. The alloy specimens were fabricated by both traditional casting, by milling and by laser melting and sintering.
PUBLICATIONS
Antimicrobial and physicochemical characterization of endodontic sealers after exposure to chlorhexidine digluconate
The primary aim of root canal treatment of teeth with apical periodontitis is to eliminate the microbial load from the root canal system and promote periapical healing. Meticulous mechanical debridement of the root canal system significantly reduces the bacterial load and is considered important in canal disinfection. However, complete elimination of all microorganisms is challenging, as viable bacteria potentially remain on the dentin walls and inside dentinal tubules, both in planktonic forms and biofilms. About 35% of the root canal area is left untouched when conventional rotary and hand instruments are used. Therefore, disinfection with irrigation solutions during root-canal treatment and thereafter obturation of the root canal are important factors to reduce the amount and growth of residual bacteria.
Hvor mye monomer kan lekke fra en protese?
Protesematerialer inneholder ureagert monomer som kan lekke ut i munnhulen og gi bivirkninger, men i hvor stor grad skjer dette? Tanntekniske laboratorier fremstilte protesematerialer etter sin vanlige metode og NIOM analyserte mengde ureagert monomer, såkalt...
Adhesion of Escherichia Coli to Nanostructured Surfaces and the Role of Type 1 Fimbriae
In this study a method of producing a large number of identical nanostructured surfaces is presented. E. coli wild type and deletion mutants of the type 1 fimbriae monomers FimA or FimH were tested for their ability to adhere to such surfaces with different interpillar distance of 100, 250, and 500 nm, respectively. An increase in interpillar distance (reduced surface coverage) was associated with reduced adhesion of E. coli wild type and the deletion mutants. In addition, the presence of a functional type 1 fimbria decreased adhesion to the nanopatterned surfaces in comparison to deletion mutants, leading us to the conclusion that there is a relationship between presence of a functional fimbriae and adhesion towards tested surfaces. The hypothesis that the presence of fimbriae had an effect on bacterial attachment to nanostructured surfaces was verified. These current results could provide insight into development of new nano-patterned structures with anti-adhesion bacterial properties.
LABORATORIES
NIOM TESTED
NIOM has established a programme for the quality evaluation of a number of dental products. The evaluation is based on testing of the products according to methods in relevant ISO and other standards, or according to other well-established and documented test methods. Products fulfilling the set requirements are granted permission to use the NIOM TESTED quality seal. The NIOM TESTED quality seal confirms that the product meets the requirements specified by NIOM.