Effect of Conditioning with Fluoride and Phosphoric Acid on Enamel Surfaces as Evaluated by Scanning Electron Microscopy and Fluoride Incorporation

Kochavi, David; Gedalia, I.; Anaise, Joseph Z.

doi:10.1177/00220345750540021901

Cited by 48 publications

(17 citation statements)

References 11 publications

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“…Gwinnett (1971) who studied the histological changes in human enamel after treatment with 50% phosphoric acid found that the thickness of the removed surface layer was 5-25 yttm. The fact that no significant differences of fluoride were found between unetched and etched enamel layers in the present and previous study confirms that etching with 50 % phosphoric acid removes only a very thin layer of the surface (Kochavi et al, 1975). The inclusion of fiuoride compounds in 50% phosphoric acid noticeably mcreased the fiuoride concentration of the etched enamel (Table I).…”

Section: Discussionsupporting

confidence: 86%

Tensile strength of the bond between resin to enamel etched with phosphoric acid containing fluoride

Grajower

Glick

Gedalia

et al. 1979

J of Oral Rehabilitation

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The tensile bond strength of Epoxylite 9075 and Enamelite to enamel treated with NaF and SnF2, at two concentrations, in the etching acid (H3PO4) was determined. The average fracture stress of those samples in which fracture occurred in the resin only, may be considered as the tensile strength of the resin, 69.8 +/- 5.6 kg/cm2. The mean fracture stresses of the Epoxy 9075 systems etched with pure phosphoric acid or with acid solutions containing 0.5% F salts were significantly higher than those treated with acid solutions containing 2% F salts. Incorporation of NaF or SnF2 in the etching solutions highly increased the fluoride concentration of enamel. The fluoride increase dependend on the fluoride concentration of the etching solution and was greater for NaF than SnF2.

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Section: Discussionsupporting

confidence: 86%

Tensile strength of the bond between resin to enamel etched with phosphoric acid containing fluoride

Grajower

Glick

Gedalia

et al. 1979

J of Oral Rehabilitation

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“…These products partly or completely fill the interprismatic space and result in a smaller bonding area as well. 22 Therefore, the decrease in tensile bond strength for the fluoride prophylactic paste group is most likely due to decreased enamel solubility after the incorporation of the fluoride ions onto the enamel surface. The smooth cement-enamel interface observed in the SEM may indicate reduced retention and mechanical interlocking ( Figure 2B).…”

Section: Discussionmentioning

confidence: 99%

Effect of prophylactic pastes containing active ingredients on the enamel-bracket bond strength of etch-and-rinse and self-etching systems

Al-Twaijri

Viana

Bedran-Russo

2011

The Angle Orthodontist

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Objective: To evaluate the effect of prophylactic pastes containing active ingredients such as amorphous calcium phosphate (ACP), fluoride, or a combination of both on the enamel-bracket tensile bond strength. Materials and Methods: Human molars were randomly divided into four groups (N 5 40) according to the type of prophylactic pastes: control (no active ingredients), paste containing fluoride, paste containing ACP, and paste containing both fluoride and ACP. After prophylaxis, 20 brackets per group were bonded using an etch-and-rinse bonding technique (37% phosphoric acid and Ortho solo), and the other remaining 20 brackets were bonded using a self-etch bonding technique (Clearfil S 3 Bond). Samples were tested for tensile strength 24 hours after bonding using a universal testing machine. Data were analyzed using analysis of variance (ANOVA) and Student's t-test with significance level at .05. Results: The mean tensile bond strength varied between 3.043 (ACP) and 9.232 (control) MPa. The etch-and-rinse bonding technique was significantly affected by pastes containing active ingredients (P , .001). The self-etching system was not significantly affected by different pastes (P . .05). Conclusions: Cleaning enamel surfaces with prophylactic pastes that contain ACP and/or fluoride, prior to orthodontic bonding, resulted in a statistically significant decrease in the tensile bond strength of etch-and-rinse bonding technique. (Angle Orthod. 2011;81:788-793.)

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“…Restorative dentists have also found bonding to fluorosed teeth to be problematic. 3 Scanning electron microscope studies have confirmed that the difficulty in bonding is likely attributable to the inability of fluorosed enamel to be effectively etched with 37% phosphoric acid, [4][5][6] which results in a decreased amount of enamel irregularity, preventing effective bonding. These studies demonstrate that it is difficult to predict how a fluorosed tooth will be etched.…”

Section: Introductionmentioning

confidence: 99%

In Vivo Bonding of Orthodontic Brackets to Fluorosed Enamel using an Adhesion Promotor

Noble

Karaiskos

Wiltshire

2008

The Angle Orthodontist

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Objectives:To determine the success of bracket retention using an adhesion promoter with and without the additional microabrasion of enamel. Materials and Methods: Fifty-two teeth with severe dental fluorosis were bonded in vivo using a split-mouth design where the enamel surfaces of 26 teeth were microabraded with 50 m of aluminum silicate for 5 seconds under rubber dam and high volume suction. Thirty-seven percent phosphoric acid was then applied to the enamel, washed and dried, and followed by placement of Scotchbond Multipurpose Plus Bonding Adhesive. Finally, precoated 3M Unitek Victory brackets were placed and light cured. The remaining teeth were bonded using the same protocol but without microabrasion. Results: After 9 months of intraoral service, only one bond failure occurred in the control group where microabrasion was used. Chi-square analysis revealed P ϭ .31, indicating no statistical significance between the two groups. Conclusions: Bonding orthodontic attachments to fluorosed enamel using an adhesion promoter is a viable clinical procedure that does not require the additional micro-mechanical abrasion step.

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Effect of Conditioning with Fluoride and Phosphoric Acid on Enamel Surfaces as Evaluated by Scanning Electron Microscopy and Fluoride Incorporation

Cited by 48 publications

References 11 publications

Tensile strength of the bond between resin to enamel etched with phosphoric acid containing fluoride

Tensile strength of the bond between resin to enamel etched with phosphoric acid containing fluoride

Effect of prophylactic pastes containing active ingredients on the enamel-bracket bond strength of etch-and-rinse and self-etching systems

In Vivo Bonding of Orthodontic Brackets to Fluorosed Enamel using an Adhesion Promotor

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