Effect of whitening toothpaste on titanium and titanium alloy surfaces

Abstract

Dental implants have increased the use of titanium and titanium alloys in prosthetic applications. Whitening toothpastes with peroxides are available for patients with high aesthetic requirements, but the effect of whitening toothpastes on titanium surfaces is not yet known, although titanium is prone to fluoride ion attack. Thus, the aim of the present study was to compare Ti-5Ta alloy to cp Ti after toothbrushing with whitening and conventional toothpastes. Ti-5Ta (%wt) alloy was melted in an arc melting furnace and compared with cp Ti. Disks and toothbrush heads were embedded in PVC rings to be mounted onto a toothbrushing test apparatus. A total of 260,000 cycles were carried out at 250 cycles/minute under a load of 5 N on samples immersed in toothpaste slurries. Surface roughness and Vickers microhardness were evaluated before and after toothbrushing. One sample of each material/ toothpaste was analyzed by Scanning Electron Microscopy (SEM) and compared with a sample that had not been submitted to toothbrushing. Surface roughness increased significantly after toothbrushing, but no differences were noted after toothbrushing with different toothpastes. Toothbrushing did not significantly affect sample microhardness. The results suggest that toothpastes that contain and those that do not contain peroxides in their composition have different effects on cp Ti and Ti-5Ta surfaces. Although no significant difference was noted in the microhardness and roughness of the surfaces brushed with different toothpastes, both toothpastes increased roughness after toothbrushing.

Effect of nano-zinc oxide and fluoride-doped bioactive glass-based dentifrices on esthetic restorations

“…The distribution and size of the filler have an impact on the surface roughness. 4,8 In this study, the resin-based composites showed an insignificant change in the micro-hardness values and less increase in the surface roughness as compared to RMGIC. The results were justified by the fact that composites have silane coupling agents, which bind the filler particles chemically with the resin matrix, and the same material accounts for their hydrolytic stability.…”

“…3 Tooth brushing is considered a significant factor in improving oral health 4 ; on the other hand, some untoward effects of using a toothbrush and dentifrices on color stability and surface roughness have been observed. [5][6][7][8] It has been reported that brushing increases the surface roughness and subsequently leads to plaque accumulation. 3,9,10 What has to be taken into consideration is the abrasiveness of the dentifrice.…”

“…Some studies have claimed that dentifrices might cause the deterioration of restorative materials. 8,11 The size of particles and the type of abrasive agents used have an influence on the abrasiveness of the dentifrice. 5,12 A desire to improve the quality of oral hygiene has given rise to many types of dentifrices.…”

Corrosion Performance of Fe-Cr-Ni Alloys in Artificial Saliva and Mouthwash Solution

“…It has high active oxygen content (47%) and produces water as the only by-product [ 40 , 41 ]. Reaction between H 2 O 2 and Cr of the stainless steels is In relation to titanium, it has been reported that its corrosion in the presence of a solution with fluoride ions is superficial and transitional because the passive layer created on titanium surface reassembles quickly [ 42 ]. The negative influence of fluoride on the corrosion of titanium and its alloys has been reported earlier [ 7 – 9 ].…”

Effects of bleaching agents on dental restorative materials: A review of the literature and recommendation to dental practitioners and researchers

“…However, the observed bleaching effects were not statistically significant. 24 In another study, surface topographic alterations of gold, NieCr, and CoeCr alloys occurred as a result of the application of 10% and 35% CP simulating at-home bleaching and in-office bleaching during 14 days, respectively. 25 Moreover, the elemental release from a NieCr alloy was found to be increased due to 10% HP or 10% CP treatment for 30 days.…”