Occupational hazards in dental clinics -

Dental personnel have the potential of being exposed to a variety of chemicals during the working day, many of which may cause temporary or permanent injury. A recent article co-authored by NIOM scientist Jan Tore Samuelsen in “Tandlægebladet” breaks down the risks dental personnel face during their working day in terms of exposure to a variety of chemicals.

Hardness testing of dental materials and tooth substance -

Hardness is an important mechanical property of dental materials and is defined as the resistance to permanent surface indentation. NIOM has recently acquired a new hardness tester, and the instrument is used in a range of different research projects.

Forty-five anniversary – and many more to come! -

Lisbeth Normann, Secretary to the minister of Health and Care Services, officially opened NIOM’s 45th anniversary seminar. Her speech centred on the establishment of NIOM in 1972, the changing dental health situation since then and the role of dental health in Nordic and European perspective in the time to come.

Research for patient safety -

The Nordic seminar entitled “45 Years of Research for Patient Safety” (Forskning og pasientsikkerhet i 45 år) was organized by NIOM on behalf of the Ministry of Health and Care Services. The seminar on May 8th and 9th marked the Norwegian presidency of the Nordic Council of Ministers in 2017 and the 45th anniversary of NIOM.

Substantial variations in light curing procedures -

Reported data is scarce on light curing times of restorations and irradiance of the curing devices used. In this study we sought to improve the knowledge of such parameters as total light dose applied to a restoration layer and the total potential exposure to reflected light to the dentist’s eyes during a workday.

Vacant position as visiting scientist at NIOM during 2018 -

Positions as visiting scientist in the field of biomaterials research are offered at the Nordic Institute of Dental Materials, NIOM, in Oslo, Norway.

The oral microflora – a reservoir of antibiotic resistance genes? -

The increase in antibiotic resistant bacteria calls for conscious antibiotic prescription which should be restricted to evidence-based knowledge of their usefulness to the patient.

Success in light curing -

Welcome to our webinar on May 30th. In this webinar our Head of Laboratory, Hilde M. Kopperud, will present topics on light curing techniques and discuss how to avoid pitfalls when buying a new curing lamp.

Repair or replace -

Repair is the best treatment for defective restorations, most dentists in Norway argue. In a questionnaire study from NIOM and University of Oslo, up to 90 % of the respondents favoured repair rather than replacement of the restoration.

En nordisk møteplass for materialkunnskap gjennom 45 år -

2017 har Norge formannskapet i Nordisk Ministerråd samtidig som det er 45 år siden NIOM ble etablert. Dette markeres med seminaret Forskning og pasientsikkerhet i 45 år.

New standards for digital impressions -

CAD/CAM and 3-D printing have arrived with full force in dentistry. NIOM is leading the work to secure standards for scanning accuracy.

New high sensitivity analytical instrument at NIOM -

NIOM has recently acquired a high sensitivity ultra-high performance liquid chromatography mass spectrometry (UHPLC-MS) instrument.

Toxicity of monomers -

The term “resin-based dental materials” refers to dental materials containing polymers, like composites, adhesives, cements and denture base material. Usually, these polymers are formed by in situ polymerization of methacrylate monomers.

NIOM brings you one step closer to product certification -

Closing the gap between product development and product certification is easy when you present an independent test report from NIOM.

NIOM at Nordic annual dental meetings 2016 -

NIOM toured the Scandinavian annual dental meetings in 2016.

Merry Christmas and Happy New Year! -

Thank you for your collaboration in 2017. We look forward to a fantastic new year!

Are antibacterials necessary in caries prophylaxis? -

Antibacterials should not be administered routinely for caries prophylaxis, but rather only when conventional plaque control is likely to be ineffective. There are many different antibacterial agents on the market, but there are few agents with an evidence-based long-term anticaries effect.

The new real-time polymerase chain reaction detection system at NIOM -

The real-time polymerase chain reaction (PCR) detection system opens up new possibilities for research at NIOM. The instrument has several applications including identification of single nucleotide polymorphism, identification and quantification of microorganisms from different samples and investigations of gene expression in mammalian cells and bacteria.

Magnification loupes and light curing
Magnification loupes and light curing -

A recent evaluation has revealed that the use of magnification loupes does not increase the risk of eye damage associated with light exposure from curing lamps. However, light curing does require the use of eye protection.

Metallic materials for fixed and removable restorations and appliances -

The international standard ISO 22674 Dentistry – Metallic materials for fixed and removable restorations and appliances, has been revised and published in a second edition in 2016, after the first release in 2006. The standard classifies metallic materials suitable for the fabrication of dental restorations and appliances.

Approximal fillings increase the caries risk -

Placing a Class II composite restoration makes it five times more likely to require a restoration in the sound adjacent surface in the near future.

New confocal laser scanning microscope -

A new confocal laser scanning microscope (CLSM) system FV1200 from Olympus opens new possibilities for high-quality imaging of biological and material samples at NIOM.

Interactions of liposomes with dental materials -

Liposomes are nanosized vesicular structures that are well-recognized for their function as drug delivery systems. The surface charge of the liposomes seems to be the main determinant in the immediate interaction between liposomes and dental restoratives.

Quality of medical devices used in dentistry -

The longevity and efficacy of dental restorative procedures is to a great extent related to the quality of the products used. The quality and use of medical devices has a direct impact on health issues and health economics.

Minimal intervention dentistry – all caries lesions do not need operative treatment -

All caries lesions do not need operative treatment! Minimal intervention dentistry is a modern dental practice designed around a principal aim of preservation of as much of the natural tooth structure as possible.

Vacant positions: Visiting scientist at NIOM during 2017 -

Positions as visiting scientist in the field of dental biomaterials research are offered at the Nordic Institute of Dental Materials, NIOM, in Oslo, Norway.

Silanising agents promote composite repair -

Repair of defective composite restorations instead of full replacement has been actualised over the last decades.

FTIR spectroscopy for measurement of curing -

The degree of conversion (DC) is a measurement of the curing of a resin-based material. Fourier Transform Infrared spectroscopy (FTIR) may be used to determine the DC. The method calculates the conversion of reactive methacrylate groups in the material. The calculation is based on ratios of area or height of specific peaks in the FTIR spectrum of the material.

Strength of all-ceramic crowns is influenced by the margin design -

A recent study performed at NIOM showed that a modified design of the crown margin gave stronger crowns without jeopardizing the aesthetics.

Bonding -

The bond strength between the different materials is crucial for the longevity of a restoration.

New monomer in dental composites -

A recent master thesis at NIOM aimed to study the change in the physical and toxic properties of experimental dental composites with varying monomer-composition.

NIOM TESTED: New product groups -

NIOM’s programme for the quality evaluation of dental products has been enlarged with three new product groups.

Base-metal restorations seem safe -

Does the shift in high cost of noble alloys and new methods for fabrication have an implication on patient safety?

High-sensitivity analytical instruments (GC/MS and LC/MS) -

When combined, GC/MS and LC/MS allow for analysis of the whole spectrum of leaching components.

Materials for indirect restorations -

The overall topic of NIOM’s presentation at the Norwegian Dental Association’s annual meeting and Swedental in 2015 was Materials for indirect restorations; both metals and all-ceramic materials.

The effect of polymer-based dental composites on living cells -

Polymer-based composites are often the material of choice in restorative dentistry. Composites consist of two main phases; the filler, usually silica particles of various sizes, and the matrix that in general is a mixture of methacrylate monomers.

Is the caries risk reduced by placing a restoration? -

A contagion effect of caries on tooth surfaces in contact with each other has previously been demonstrated; the presence of a caries lesion on an approximal tooth surface increases the risk of developing caries in a sound contact surface on the adjacent tooth. Will this increased risk for caries development be eliminated when restoring the decayed surface with a restoration? A recent publication by the NIOM scientist Dr Kopperud has elucidated the question.

The margin design and quality may jeopardize the ceramic crown strength -

Several studies have been performed in order to assess the effect of different preparation designs for all-ceramic crowns, but the results are ambiguous. Most trials have found no or little effect of different design of the cervical finish line. The new method for clinically relevant testing of all-ceramic crowns developed at NIOM and the University of Bergen in 2012, and published in Dental Materials in 2013, has now been applied to assess one essential parameter of margin design: the curvature of the cervical margin over the gingival papilla.

Easy-to-use, easy-to-regret over-the-counter bleaching products -

All but one patient reported side effects of over-the-counter (OTC) bleaching products, while their teeth became noticeably whiter. Two OTC bleaching products with concentrations of 16% and 22% carbamide peroxide gave the same painful but satisfactory bleaching result. The patients found that the easier the products were to handle, the more satisfied they were with the bleaching treatment.

New expertise in organic synthesis at NIOM -

NIOM has recently employed a new scientist and is excited to apply organic synthesis to research and development and analysis of biomaterials for dentistry.