Effect of Nanofiller Technology on Surface Properties of Nanofilled and Nanohybrid Composites

Abstract

Context: Nanocomposites are becoming popular today because of the manufacturers claiming high surface smoothness and good abrasion resistance properties thus improving the longevity of the restoration.Aims: This in vitro study was carried out to investigate the effect of nanofillers on surface roughness and abrasion resistance of nanofilled composite-Filtek Z350 (3M ESPE) and nanohybrid composite-Tetric N Ceram (Ivoclar Vivadent) after polishing and abrasion.Methods and material: A total of fifteen disc specimens of each category of material were prepared under standardized conditions. The discs were finished and polished according to manufacturer's instructions. The samples were examined for surface roughness using Mahr Perthometer M2 followed by scanning electron microscope examination. In order to assess the performance of the materials in simulated oral conditions the samples were then subjected to toothbrush-dentifrice abrasion and the resultant surface roughness was compared for both the materials. Statistical analysis:Mean value of surface roughness was calculated for both the groups from Ra values before and after toothbrushdentifrice abrasion followed by calculation of Standard deviation (SD). Paired-t test was then applied to compare the surface roughness values before and after toothbrush-dentifrice abrasion within the same group. Results:Initially the surface roughness of Filtek Z350 were found to be superior to Tetric N Ceram but after subjecting to toothbrush dentifrice abrasion Tetric N Ceram showed greater increase in surface roughness as compared to Filtek Z350. The difference was found to be statistically significant.Conclusions: Nanofiller type, size and distribution significantly influence the surface properties of composites. Though nanohybrid composite showed a better initial surface polish but nanofilled composite showed a better abrasion resistance.

The difference in microleakage levels of nanohybrid composite resin using eighth-generation ethanol and isopropanol solvent bonding materials under moist and dry conditions (in vitro study)

“…5 It also contains additional components of the resin matrix in the form of nanoparticles and nanoclusters 6 , the combination of which can reduce the interstitial distance between particles, thereby increasing resistance filler, physical properties, mechanical properties and retention. 7,8 Microleakage can be caused by shrinkage during the polymerization process and the lack of adhesive material attachments to enamel and dentin. Emergent cracks are still considered restoration-related problems because fluids, ions and bacteria can pass through them, causing other problems such as secondary caries, discoloration of ridge edges, pulp irritation and sensitive teeth.…”

Kekasaran Permukaan Resin Komposit Nanofiller Setelah Penyikatan Dengan Pasta Gigi Whitening Dan Non Whitening

“…3 Selain berpengaruh pada perkembangan bahan restorasi, peningkatan kebutuhan estetik dental juga memberi pengaruh pada perkembangan pasta gigi. Dalam dekade terakhir ini, pasta gigi menjadi lebih beragam dan dapat diklasifikasikan baik sebagai penggunaan terapeutik atau kosmetik.…”

Effects of Silica Nanoparticles and Silica-Zirconia Nanoclusters on Tribological Properties of Dental Resin Composites

“…Wear resistance is an important property in the performance of dental composites because lack of wear resistance will produce an excessive reduction in structure, resulting in the loss of posterior tooth support, vertical dimension of occlusion, masticatory efficiency and esthetics, as well as alterations in the functional path of masticatory movement, fatigue of masticatory muscles, and faulty tooth relationship [4]. Wear (resistance) performance of dental resin composites is affected by roughness and hardness, while roughness also influences aesthetic appearance, discoloration, plaque accumulation, the appearance of secondary caries, gum inflammation, and wear of opposing and adjacent teeth [5][6][7][8], and hardness, defined as how resistant the material is to penetration, can be used to predict wear resistance and the tendency of the material to erode the opposing tooth or material [7,9,10].…”

“…As particle size is related to roughness, hardness, and other properties, it is proposed that the use of nanofillers will allow materials to be obtained with better mechanical properties such as compression, fracture, and bending resistance [19][20][21] and improved surface properties such as better gloss, polish, and wear resistance [5,6,[22][23][24]. It is also proposed that the use of nanoparticles will allow reduced roughness [6], although other studies have pointed to a lack of evidence supporting this, since the difference in measuring methods and processes for polishing makes it difficult to compare them [11].…”

“…It is also proposed that the use of nanoparticles will allow reduced roughness [6], although other studies have pointed to a lack of evidence supporting this, since the difference in measuring methods and processes for polishing makes it difficult to compare them [11]. ere are reports that indicate that nanoclusters, in spite of having bigger particle size than individual nanoparticles, allow materials to be obtained with improved surface properties such as better gloss, polish, and wear resistance [5,6,[22][23][24]. Nanoclusters are nanoparticle aggregates with controlled size and morphology, obtained prior to the dispersion process in the resin [25][26][27].…”