Micromorphological changes in resin‐dentin bonds after 1 year of water storage

Hashimoto, Masanori; Ohno, Hiroki; Sano, Hidehiko; Tay, Franklin R.; Kaga, Masayuki; Kudou, Yoshiyuki; Oguchi, Haruhisa; Araki, Yoshimori; Kubota, Minoru

doi:10.1002/jbm.10208

Cited by 206 publications

(195 citation statements)

References 11 publications

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“…[8][9] On the other hand, it has been reported that a comparatively higher bond strength was obtained for self-etching primer adhesive systems with the creation of a submicron resin tag. 10 The question arises whether the resulting bonds might be stable after thermal cycle stressing. 11 With tooth colored restorations, evaluation for bonding durability is important, since stability of the bond between the restoration and tooth substrate is important for long-term clinical success.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Cycling on Enamel Bond Strength of Single-step Self-etch Systems

Amano

Yamamoto

Tsubota

et al. 2006

Operative Dentistry

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After thermal cycling, some recently introduced simplified bonding systems showed no change in enamel bond strengths. The systems used were Absolute, Clearfil tri-S Bond, G-Bond and One-Up Bond F Plus. Bovine mandibular incisors were mounted in self-curing resin, and the facial surfaces were wet ground with #600 SiC paper. Adhesives were applied on the prepared enamel surfaces and light irradiated according to each manufacturer's instructions. Resin composites were condensed into a mold (ø4x2 mm) and light irradiated for 30 seconds. Thirty specimens per adhesive systems were divided into 1 of 3 test groups (n=10) following storage in water at 37°C for 24 hours. The specimens were then stored in 37°C water for 24 hours, followed by thermal cycling 10,000 and 20,000 times between 5°C and 60°C. After each storage condition, the specimens were tested in shear mode at a crosshead speed of 1.0-mm/minute. One-way ANOVAs and Tukey HSD test at a level of 0.05 were conducted.After 24 hours of water storage, the mean enamel bond strengths ranged from 11.3 to 16.9 MPa, and Clearfil tri-S Bond showed significantly higher bond strength. After thermal cycling, the mean bond strengths ranged from 8.3 to 20.7 MPa. The changes in enamel bond strengths were different among the adhesive systems tested. Failure modes after the test were commonly adhesive failure associated with partial cohesive failure adhesive in resin.

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Section: Introductionmentioning

confidence: 99%

Effect of Thermal Cycling on Enamel Bond Strength of Single-step Self-etch Systems

Amano

Yamamoto

Tsubota

et al. 2006

Operative Dentistry

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“…However, marginal discoloration or recurrent caries are frequently found in clinical resin restoration for long-term use. Several in vivo [1][2][3][4] and in vitro studies [5][6][7][8] have shown the degradation mechanism of the bonds. However, information on bond degradation is very limited.…”

Section: Introductionmentioning

confidence: 99%

“…However, information on bond degradation is very limited. Degradation analysis has mainly been conducted with the use of water storage testing [5][6][7][8] or human 2,3 and monkey models. 1,4 However, in these test methods the disadvantage is that a long test span (i.e., months or years) is needed to obtain results.…”

Section: Introductionmentioning

confidence: 99%

Deproteinizing effects on resin–tooth bond structures

et al. 2003

Self Cite

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This study investigated the effects of NaOCl on resin-tooth bonds to simulate the situations of long-term durability and caries invasion. Resin-tooth bonded specimens were produced with the use of two resin adhesives (Excite and One-Bond). Resin-tooth bonded beams (adhesive area; 0.9 mm 2 ) were serially sectioned and the specimens were immersed in 10% NaOCl medium for 0 (control), 2, 4, and 6 h after being stored in water for 24 h. After immersion, microtensile bond tests were performed. SEM fractography was conducted to calculate each failure mode by image analysis. In addition, the adhesive interface was examined with the use of TEM. In the control specimens, enamel bond strengths had no difference between Excite (45.6 ؎ 15.0) and One-Bond (56.9 ؎ 12.9). On the other hand, dentin bond strengths had significant difference between Excite (80.6 ؎ 21.2) and One-Bond (50.7 ؎ 11.2). The bond strengths decreased with increased storage time for both systems with enamel and dentin bonds. The deteriorated mineralized dentin of beams resulted in bondstrength reduction for resin-enamel bonds. For dentin bonding, the adhesive interface was gradually dissolved from the outer to the center portion of the beam. The depletion of collagen fibrils within the demineralized dentin or hybrid layer deformation was found under SEM and TEM examinations. These morphological changes are responsible for bond strength reduction of resin-dentin bonds.

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“…Incomplete infiltration of an adhesive into etched dentin reduces the bond strength as well as the durability of the restoration, because acid-etched exposed collagen fibrils unprotected by resin have been shown to be morphologically altered after long-term storage in water (21). In such a case, storage in water would cause partial demineralization of the surface layer, and this would be detected by the surface sensitive method.…”

Section: Discussionmentioning

confidence: 99%

Changes in elastic modulus of adhesive and adhesive-infiltrated dentin during storage in water

et al. 2008

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The purpose of this study was to determine the elastic modulus of components at the resin-dentin interface with the use of an ultrasound device. Dentin slabs were obtained from freshly extracted bovine incisors shaped into a rectangular form. After demineralization, the dentin specimens were immersed in adhesives and polymerized. Adhesives were also polymerized and trimmed into the same shape as the dentin slabs. The specimens were then immersed in distilled water at 37°C for up to one year. The ultrasound equipment employed in this study was a Pulser-Receiver, transducers and an oscilloscope. By measuring the longitudinal and shear wave sound velocities, the elastic modulus was determined. When the elastic modulus of adhesive resin-infiltrated demineralized dentin was compared with that of adhesives, slightly but significantly lower values were found for adhesives used in a self-etching primer system. On the other hand, a higher elastic modulus was observed for resin-infiltrated dentin than for an adhesive used in an etch and rinse system. The elastic modulus of the resin-infiltrated dentin prepared with the etch and rinse system was affected by long-term storage in distilled water. (J. Oral Sci. 50, [481][482][483][484][485][486] 2008)

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Micromorphological changes in resin‐dentin bonds after 1 year of water storage

Cited by 206 publications

References 11 publications

Effect of Thermal Cycling on Enamel Bond Strength of Single-step Self-etch Systems

Effect of Thermal Cycling on Enamel Bond Strength of Single-step Self-etch Systems

Deproteinizing effects on resin–tooth bond structures

Changes in elastic modulus of adhesive and adhesive-infiltrated dentin during storage in water

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