Influence of different pre‐etching times on fatigue strength of self‐etch adhesives to dentin

Takamizawa, Toshiki; Barkmeier, Wayne W.; Tsujimoto, Akimasa; Suzuki, Takayuki; Scheidel, Donal D.; Erickson, Robert L.; Latta, Mark; Miyazaki, Masashi

doi:10.1111/eos.12253

Cited by 33 publications

(38 citation statements)

References 36 publications

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“…The SFE values in the baseline groups showed that phosphoric acid pre-etching increased the total free-energy by about 30% compared with grinding with SiC paper without pre-etching, and this was similar to the results observed in a previous report (22). Therefore, taking the modified surface structure into consideration, the results of the present study are consistent with other studies that reported the effectiveness of phosphoric acid pre-etching for universal adhesives (7,12).…”

Section: Discussionsupporting

confidence: 91%

Influence of application method on surface free‐energy and bond strength of universal adhesive systems to enamel

Imai

Takamizawa

Sai

et al. 2017

European J Oral Sciences

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The aim of the present study was to determine the influence of different adhesive application methods and etching modes on enamel bond effectiveness of universal adhesives using shear bond strength (SBS) testing and surface free-energy (SFE) measurements. The adhesives Scotchbond Universal, All-Bond Universal, Adhese Universal, and G-Premio Bond were used. Prepared bovine enamel specimens were divided into four groups, based on type of adhesive, and subjected to the following surface treatments: (i) total-etch mode with active application; (ii) total-etch mode with inactive application; (iii) self-etch mode with active application; and (iv) self-etch mode with inactive application. Bonded specimens were subjected to SBS testing. The SFE of the enamel surfaces with adhesive was measured after rinsing with acetone and water. The SBS values in total-etch mode were significantly higher than those in self-etch mode. In total-etch mode, significantly lower SBS values were observed with active application compared with inactive application; in contrast, in self-etch mode there were no significant differences in SBS between active and inactive applications. A reduction in total SFE was observed for active application compared with inactive application. The interaction between etching mode and application method was statistically significant, and the application method significantly affected enamel bond strength in total-etch mode.

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Section: Discussionsupporting

confidence: 91%

Influence of application method on surface free‐energy and bond strength of universal adhesive systems to enamel

Imai

Takamizawa

Sai

et al. 2017

European J Oral Sciences

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“…A previous study showed that the phosphoric acid etching depth in ground enamel was 20–25 μ m when using the same etching agent as in this study . Kuroiwa reported that a prismless enamel structure tended to have a stronger resistance to acid than a prismatic enamel surface.…”

Section: Discussionsupporting

confidence: 56%

Immediate enamel bond strength of universal adhesives to unground and ground surfaces in different etching modes

Takeda

Takamizawa

Imai

et al. 2019

European J Oral Sciences

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The purpose of this study was to determine the immediate bond effectiveness of universal adhesives to unground and ground enamel surfaces in different etching modes, through shear bond strength (SBS) tests and scanning electron microscopy observations. Three universal adhesives, a conventional two‐step self‐etch adhesive, and a conventional single‐step self‐etch adhesive were compared. Human enamel specimens from lower anterior teeth were divided into four groups and subjected to the following treatments: (i) unground enamel in self‐etch mode; (ii) ground enamel in self‐etch mode; (iii) unground enamel in etch‐&‐rinse mode; and (iv) ground enamel in etch‐&‐rinse mode. Bonded assemblies were subjected to SBS testing. All the adhesives showed significantly higher SBS values in etch‐&‐rinse mode than in self‐etch mode, regardless of whether enamel was unground or ground. The influence of the enamel surface condition on SBS was different in different etching modes. Without pre‐etching, all tested materials showed lower SBS values in unground enamel than in ground enamel. In etch‐&‐rinse mode, no significant differences in SBS values were observed between unground enamel and ground enamel for any of the adhesives tested. Phosphoric acid pre‐etching before application of self‐etch adhesives to an unground enamel surface is essential to enhance initial enamel bond effectiveness.

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“…On the other hand, fatigue investigation of the adhesive interface could provide a clinically relevant insight on dentin bond durability. One previous study on the shear fatigue strength to dentin has reported that under the repetitive load from one direction, the shear fatigue strength value was calculated to be approximately 20 MPa 38) , which was lower than the magnitudes of shear stress concentration at the mesiodistal cervical edge of core part (25 MPa) in the present study. This suggests that the repetitive load might cause fatigue failure at the adhesive interface of the mesiodistal cervical edge in the resin post and core.…”

Section: Discussioncontrasting

confidence: 80%

Stress distribution in tooth resin core build-ups with different post-end positions in alveolar bone level under two kinds of load directions

et al. 2018

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This study aimed to evaluate influence of different post-end positions in alveolar bone level on stress distributions in resin-core build-up tooth under different load directions. Three-dimensional mathematical models of a root-filled mandibular premolar tooth were constructed. Resin post and core were built-up with six post lengths: 0, 1, 2, 3, 4, and 6 mm. Finite element analysis calculated stress distributions with oblique load of 400 N to buccal cusp 45 degree from buccal side or from lingual side. The 3 mm-post length (post-end position equal to cancellous bone level) caused highest equivalent stress of post-end compared with the shorter or longer post length. When change of load direction, the direction of maximum shear stress became completely opposite at mesiodistal cervical edge of core-part without a change of the magnitude. Changing shear stress direction would increase risk of debonding at mesiodistal cervical edge.

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Influence of different pre‐etching times on fatigue strength of self‐etch adhesives to dentin

Cited by 33 publications

References 36 publications

Influence of application method on surface free‐energy and bond strength of universal adhesive systems to enamel

Influence of application method on surface free‐energy and bond strength of universal adhesive systems to enamel

Immediate enamel bond strength of universal adhesives to unground and ground surfaces in different etching modes

Stress distribution in tooth resin core build-ups with different post-end positions in alveolar bone level under two kinds of load directions

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