Staining susceptibility of recently developed resin composite materials

Abstract

Objectives: To evaluate the colour stability of 3 recently developed resin based materials continuously exposed to various staining agents.Methods: 144 disc-shaped specimens were made of each of the 3 tested composites (Essentia, Brillant, Inspiro). Half of them were of 1mm thickness, the other half 1.2mm thickness. The thicker group was than polished up to 4000 grit and reduced to 1mm thickness, too. All specimens after 24 h dry storage in an incubator (INP-500, Memmert), received an initial colour measurement by means of a calibrated refl ectance spectrophotometer (SpectroShade, MHT, Niederhasli, Switzerland). Specimens were then divided into 6 groups (n=6) and immersed in 5 staining solutions or artifi cial saliva (control). All specimens were kept in an incubator at 37°C for 28 days. Staining solutions (red wine, curry mixed water, curry mixed oil, tea and coffee) were changed every 7th day to avoid bacteria or yeast contamination. After 28 days of storage spectrophotometric measurements were repeated and L*a*b* scores once more recorded to determine the colour (∆E00) changes.Results: All tested materials showed signifi cant color changes after 28 days staining immersion.When considered over a black background ∆E00 of polished samples varied from 1.7 (Brillant/ distilled water) to 24.1 (Brillant/wine).When considered over a white background ∆E00 of polished samples varied from 1.1 (Essentia/ distilled water) to 32.5 (Inspiro/wine).When considered over a black background ∆E00 of unpolished samples varied from 1.1 (Essentia, Inspiro/distilled water) to 25.8 (Essentia/wine).When considered over a white background ∆E00 of unpolished samples varied from 1.4(Inspiro/ distilled water) to 33.1 (Inspiro/wine). Conclusions:Staining of restorative materials seems to be dependent on the composition of the product itself. Unpolished samples demonstrated to be more prone to staining than the polished ones.

Influence of pigment solutions on color stability and surface properties in low-shrinkage and conventional composites

“…Although many foods contain dyes, different dye types available on the market can lead to different consequences. In line with results found in the current study, Ardu et al 15 showed that red wine has greater staining potential than coffee, probably because red wine contains tannin and anthocyanin, which may have a significant effect on the color change of the composite during aging, as well as high discoloration power.…”

“…All solutions used in the current study were kept at room temperature (20°C); so further research may be required to clarify this point. In addition, although filler particles do not absorb water, they can play an important role in composite susceptibility to staining due to weak matrix-filler bond 15 .…”

“…Tomato sauce was used because it is often included in diets around the world, and its effect on color change in resinous composites has not yet been studied. Its acidic pH may influence composite color change, since it is associated with the discoloration mechanism 15 . Another study used tomato-based sauce (ketchup) on micro-hybrid resin and recorded significant color change 11 .…”

O açaí não mancha nem altera as propriedades mecânicas de superfície da resina composta nanoparticulada in vitro

“…Therefore, the third null hypothesis was rejected. In fact, a shift was expected irrespective of the immersion media (Duc et al, 2018) even in the artificial saliva group due to resin natural intrinsic discoloration process (Ozera et al, 2019). Nevertheless, açai could have stained less by removing the composite outermost layer (Başeren et al, 2004) an issue to be further considered.…”

Intracoronal tooth bleaching – A review and treatment guidelines

“…Amalgam restorations cause a dark grey discolouration due to the penetration of the amalgam corrosion products into the dentine, 42,43 which are challenging to manage with intracoronal bleaching 24 . On the other hand, with regards to tooth‐coloured restorations, poor technique and lack of moisture control affect the marginal integrity of these restorations, 44 such that the affected teeth will have an increased risk of recurrent caries and staining from dietary sources 45 Bioceramic endodontic materials Mineral trioxide aggregate (MTA) was the first bioceramic material to be used in endodontics and based on which many other tricalcium silicate‐based endodontic materials have been introduced.…”