Dentin to dentin adhesion using combinations of resin cements and adhesives from different manufacturers – a novel approach -

The aims of this study were to present a novel method to analyse dentin bond strength and to evaluate the bond strength of combining adhesive systems and resin cement from different manufacturers. Based on the results and within the limitations of this laboratory study, it can be concluded that using alternating combinations of resin cement
and adhesives seem possible and that the resin cement were the weakest components in the bonded dentin-adhesive-cement-complex.

Protein Profiles of Individuals with Erosive Tooth Wear -

The present work suggests that protein profiling in saliva may provide a tool for determining differences in risk for erosive tooth wear. This may be of value when determining lifetime risks of loss of dental structure. To identify the risk at an early stage of the disease gives us the opportunity to implement proper individualized prevention

Minimally Invasive Dentistry -

“Minimally Invasive Dentistry” has over the years been well presented in the Nordic countries as well as in all Europe. Nevertheless, it does no harm to remind ourselves about the principles behind this concept. Based on updated knowledge on caries and tooth wear, in combination with new and improved adhesive restoration techniques, there are good […]

In Vitro Effects of Dental Monomer Exposure – Dependence on the Cell Culture Model -

Methacrylate monomers are major components of resin-based biomaterials. The polymerization of these materials is never complete, and methacrylates leaking from cured materials cause exposure of patients. Only some selected methacrylates have thoroughly been tested for possible interaction with living cells. In the current study, we compared the effects of 2-hydroxyethyl-methacrylate (HEMA; a carefully studied methacrylate) […]

Er helserisikoen ved snus undervurdert? -

Hovedbudskap til helsepersonell

Bruk av svensk snus er forbundet med økt risiko for kreft, høyt blodtrykk, økt dødelighet etter kreft og hjerte- og karsykdommer, økt risiko for psykose, overvekt, metabolsk syndrom – og (ved høyt forbruk) økt risiko for diabetes type 2. Snusbrukere som slutter etter
hjerteinfarkt, halverer risikoen for å dø i tiden etter infarktet. Bruk av snus under svangerskapet er skadelig for barnet. Den høye bruken av snus er derfor bekymringsfull.

Obesity and oral health -

Obesity of different degree comprises individuals with a body mass index BMI) of 30 or more and is often combined with cardiovascular and metabolic diseases, whereas overweight below 30 is not. Obesity has a hereditary component combined with environmental factors such as unhealthy food and lack of exercise. In addition, fatty tissue contains inflammatory mediators […]

Ion release from three different dental alloys – effect of dynamic loading and toxicity of released elements -

The aims of this in vitro study were to assess if dynamic loading increases the metal ion release of selected dental alloys and to evaluate the cytotoxicity of the released metal ions

The frequency of enamel and dentin caries lesions among elderly in Tromsø, Norway -

Data on oral health among the elderly in Norway is sparse. The aim of the present study was to describe the distribution of enamel-, dentin-, root- and secondary caries within an elderly population in Northern-Norway. A study population (n=1 173) was divided into four age groups: 65–69, 70–74, 75–79 and 80–94. Seven calibrated examiners registered […]

Estimating molar-incisor-hypomineralization among 8-year-olds based on 15-year public oral health practice-based data -

The study showed that the average prevalence of MIH among children of 8 years in Helsinki was comparable to that reported elsewhere. The number of MIH-affected teeth at early mixed dentition predicts the affection of other permanent teeth over time, mainly that of permanent canines. An irrelevant number of children had MIH-affected second primary molars. Further screening of children with MIH-affected teeth is recommended to improve individually tailored early preventive and restorative dental care. In this way, an early intervention will facilitate management of further clinical dental problems of MIH-affected teeth and improve oral health-related quality of life of children with this condition.

Restorative material choices for extensive carious lesions and hypomineralisation defects in children: a questionnaire survey among Finnish dentists -

This survey shows that Finnish dentists are rather homogeneous in their treatment decisions when managing primary tooth caries or a severely affected MIH tooth, although some practices vary between general and specialised dentists. Moreover, the disparity in treatment practices between different areas of Finland is evident. The proportion of SSC as a material choice was low. Patient co-operation plays a big role in treatment decisions and may explain why GICs were the most popular choice for restoring extensive primary tooth caries. The emphasis should be on behavioural management as well as on the evidence-based treatment recommendations.

Effect of thermal cycling on temperature changes and bond strength in different test specimens -

There is no generally accepted protocol for resin composites that simulates and accelerates ageing of the materials under oral conditions. Even though thermal cycling is one of the procedures used to seriously try to simulate physiological aging of restorative materials, review of the literature on thermal cycling procedures shows that there is little or no consistency in protocols and variables. This makes it difficult to compare results from the various investigations. Selection of variables like size of specimens, storage time, and dwell times in water baths, transfer time and number of cycles, appear to be selected by investigators mostly based on convenience rather than referenced observations or scientifically founded facts

Aquaporins’ Influence on Different Dental Erosive Wear Phenotypes in Humans. -

Dental erosive wear is a multifactorial condition of high prevalence. Nowadays, there is an emphasis on discovering individual genetic predisposition for the development of this condition. Aquaporins (AQPs) are water channel proteins expressed in salivary glands, as well as during tooth development. They are involved in salivary secretion and composition and linked to physiological protection of the oral cavity.
The aim of this study was to explore the relationship between different dental erosive wear phenotypes, AQP genes, and selected environmental factors.

MOF thin films with bi-aromatic linkers grown by molecular layer deposition -

Thin films of metal–organic frameworks (MOFs) are promising for a wide range of applications including membranes for separations and sensor materials in microelectronics. Growth of such thin films using atomic/molecular layer deposition (ALD/MLD) has recently been demonstrated; however, the range of examples is still narrow. Here, we expand the repertory of gas-phase MOF thin film […]

Commentary Guidelines on the benefit-risk assessment of the presence of phthalates in certain medical devices covering phthalates which are carcinogenic, mutagenic, toxic to reproduction (CMR) or have endocrine-disrupting (ED) properties -

The guidelines provide a framework to perform a BRA to justify the presence of CMR or ED phthalates in medical devices.
They also describe the evaluation of possible alternatives for these phthalates used in medical devices.
Manufacturers are encouraged to generate data that are needed for the BRA on potential alternatives to be used in medical devices.

Snus i svangerskapet er en fare for barnet -

Bruk av snus under svangerskapet er skadelig for mor og barn. Dette budskapet må leger og annet helsepersonell videreformidle til sine pasienter, sånn at flest mulig kvinner i fertil alder legger vekk snusen før de blir gravide. Snus og andre nikotinerstatningsmidler er ikke risikofrie alternativer til røyking.

Dysphagia, aging and oral health -

Age related changes in chewing muscles and tongue take place parallel with neurological changes in the stomatognatic system. Deterioration of this kind may lead to swallowing difficulties accompanied by coughing, discomfort, and aspiration of solid or fluid material into the airways. This condition is denoted dysphagia and is often associated with cardiovascular and neurological diseases […]

Investigation on the antimicrobial activity of chitosan-modified zinc oxide-eugenol cement -

The present study showed that a ZOE-based material has an antibacterial effect and that incorporating CH or COS may increase the antibacterial effect depending on the bacterial species. The total release of eugenol from the materials was stable for up to 18 weeks immersion in water. Eugenol therefore contributed to the antibacterial effect on all the material surfaces investigated. S. mutans exhibited the highest susceptibility to eugenol. The compressive strength of the modified materials was reduced but still met the requirements in ISO 3017.

Bond strength between dentine and a novel fast-setting calcium silicate cement with fluoride -

The aim of this study was to evaluate the dentine bond strength of a novel fast‐setting calcium silicate cement (Protooth) versus a calcium hydroxide‐based cement (Dycal), a calcium silicate cement (ProRoot MTA), and a glass ionomer cement (Ketac‐Molar). Mid‐root dentine slices of 1 mm thickness were obtained from human maxillary incisors. After enlarging the lumen […]

Erosive properties of sour sweets and drinks -

Dental erosion has a multifactorial etiology with contributions from chemical, biological and behavioral factors. In terms of chemical factors, type of foods and drinks is important. The chemical factors that determine whether foods and drinks are erosive are low pH, type of acid, meaning a low acid dissociation constant (pKa), high buffer capacity and low […]

Antimicrobial photodynamic therapy for treatment of oral biofilm associated diseases – where we are -

Abstract from Håkon Valens lecture at symposium PDT-4. Human antimicrobial PDT. ESP-IUPB World Congress, Light & Life, Barcelona, Spain. August 25-30. 2019. Bacteria in the oral cavity lives primarily in polymicrobial biofilms. Oral mature biofilms may contain several hundred different bacterial species, and over 600 different species have been shown to colonize the oral cavity. […]

Antibacterial photodynamic therapy for treatment of oral biofilms related to periodontal and peri-implant diseases -

Abstract from Håkon Valens lecture at symposium MED-10 Dentistry. (Organized by Ellen Bruzell). ESP-IUPB World Congress, Light & Life, Barcelona, Spain. August 25-30. 2019. Oral biofilm formation around teeth and dental implants may cause inflammation of the surrounding tissue, which may lead to breakdown of the attachment of the tooth or implant. Ultimately, if left […]

Photostability of an anionic porphyrin in natural deep eutectic solvents (NADES) -

Abstract from Krister Grønliens lecture at symposium PDT-4. Human antimicriobial PDT. ESP-IUPB World Congress, Light & Life, Barcelona, Spain. August 25-30. 2019. Natural deep eutectic solvents (NADES) is a group of eutectics that is based solely on environmental-friendly (“Green”) components. These solvents have unique solubilizing properties; i.e. they are more polar than water but can […]

Light sources and light-dependent procedures in dentistry -

Abstract from Ellen Bruzells lecture at symposium MED-10 Dentistry. (Organized by Ellen Bruzell). ESP-IUPB World Congress, Light & Life, Barcelona, Spain. August 25-30. 2019. Dental personnel encounter a number of optical sources emitting a broad spectrum of wavelengths. Along with the usefulness, to various extents, of optical radiation in treatment and diagnostics, comes the risk […]

A comparison of Norwegian and overseas made dental metallic crowns -

The study revealed major deficiencies for both Norwegian and overseas made crowns regarding conformity between composition and the stated declaration

Influence of Fibrinogen on Staphylococcus epidermidis Adhesion Can Be Reversed by Tuning Surface Nanotopography -

Surface modifications in the nanoscale regime have shown promising potential in the combat against bacterial adhesion and colonization of surfaces. However, detailed knowledge of how the bacteria–substrate interactions occur is still limited.

Patient related factors and dental implants -

The function and durability of Implant based rehabilitation of the dentition has proved to be comparable to traditional prosthodontics. However, loss of implants do take place from time to time as the result of inadequate osseointegration or as the result of peri-implantitis. In addition to methodological and materials related subjects research in this field has […]

Establishing a macrophage model with relevance for oral methacrylate monomer exposures: Attenuated Staphylococcus aureus-induced cytokine release from human macrophages -

Leakage of unpolymerized methacrylate monomers after placement of methacrylate-containing polymeric dental materials leads to human exposure. Based on studies using murine macrophages and LPS from Escherichia coli (E. coli), dental monomers like 2-hydroxyethyl methacrylate (HEMA) are known to inhibit lipopolysaccharide (LPS) induced cytokine release.

The frequency of enamel and dentin caries lesions among elderly Norwegians -

The article describe the distribution of enamel-, dentin-, root- and secondary caries within an elderly population in Northern-Norway.

Comparison of sandblasted, ground and melt-etched zirconia crowns regarding adhesion strength to resin cement -

The aim is to compare the adhesion between zirconia and cements attained with melt-etching with potassium hydrogen difluoride, KHF2, with that found when such traditional surface treatments as sandblasting and ceramic stone grinding are employed.

Treatment decisions regarding caries and dental developmental defects in children a questionnaire-based study among Norwegian dentists -

When dentists are treating children with dental caries or DDDs, they must decide the most appropriate treatment in each case. The results of the present study showed a notable disparity between clinician’s
treatment choices. In summary, the clinicians based their treatment choice mostly on patient cooperation, prognosis of the tooth and own experience. The results indicate that Norwegian dentists in PDS evaluate each case individually and base their decisions on what they consider is the best for the individual child.

An update on erosive tooth wear – prevalence, registration, etiology, genetic and treatment principles -

There is no standard treatment for damages caused by erosive tooth wear, and choice of treatment strategy should be determined on individual basis with emphasis on the minimal invasive intervention.

Réparation des restaurations défectueuses – Connaissances et attitudes thérapeutiques en France -

Résumé/implication clinique Le concept de réparation des restaurations défectueuses (plutôt que leur remplacement complet) fait partie des points clés de l’intervention minimale en cariologie. Cet article présente les résultats d’une enquête par questionnaire évaluant les attitudes cliniques et les connaissances en matière de prise en charge des restaurations défectueuses réalisée auprès d’une population de chirurgiens-dentistes […]

Prevention of snus use: Attitudes and activities in the Public Dental Service in the south‐eastern part of Norway -

Dental health care professionals have the opportunity to play a key role in tobacco prevention and cessation among adolescents. Snus use has increased in Norway, especially in the age group 16–24, whereas there has been a decline in smoking. This study investigated attitudes and activities related to snus prevention among dental health care professionals working in the Public Dental Service (PDS) in south‐eastern Norway.

Effect of methacrylated chitosan incorporated in experimental composite and adhesive on mechanical properties and biofilm formation -

The results of this study show that CH-MA (CH-MA) may be incorporated into a composite and into an adhesive to reduce biofilm formation on their surfaces. The mechanical properties of the composite were challenged, but flexural strength measurements still met the requirement set in ISO 4049, whereas no differences were observed for the bonding properties of the adhesives.

Thermal induced deflection of a porcelain–zirconia bilayer: Influence of cooling rate -

To determine the thermal expansion of a porcelain (VM9) and tetragonal zirconia (Y-TZP) as well as the deflection upon re-heating and cooling of a bilayer fabricated from these two materials after slow and rapid cooling during initial fabrication.

Bleaching of the Discolored Traumatized Tooth -

This chapter in “Textbook and Color Atlas of Traumatic Injuries to the teeth” focuses on the treatment of discolored traumatized teeth, most of them being non‐vital and subsequently, endodontically treated. Tooth bleaching based upon hydrogen peroxide as the active agent, applied directly or produced in a chemical reaction from sodium perborate or carbamide peroxide, must […]

Debonding mechanism of zirconia and lithium disilicate resin cemented to dentin -

To evaluate debonding mechanism of zirconia and lithium disilicate cemented to dentin mimicking what could occur in a clinical setting. A null hypothesis of no difference in tensile bond strength between groups of zirconia and lithium disilicate cemented with resin cements was also tested.

The dental monomer HEMA causes proteome changes in human THP‐1 monocytes -

Resin-based biomaterials are widely used in medical and dental treatment, and both clinicians and patients are exposed to the materials.
The present approach to analyzing the toxic potential of HEMA yielded information on interactions with living cells is not previously reported. This detailed information is of great value to make better predictions of possible side effects in the clinic.

Hvor god er du til å bestemme farge på restaureringene dine? -

Uttak av farge til fyllinger, kroner, broer og proteser av alle slag, er ofte en frustrerende øvelse. Men fortvil ikke, det ser ut til at de som praktiserer fargeuttak ofte og øver jevnlig, blir gode, uansett alder. Øvelse gjør mester