Abstract
Objective: The aim of this study was to observe the resin/dentin interfaces of universal adhesives by using scanning electron microscopy (SEM), and to compare their morphologies with conventional etch & rinse (ER) and self-etch (SE) adhesive systems. Methods: Two three-step and one two-step ER adhesives and two two-step and two single-step SE adhesives were used for comparison with seven universal adhesives in ER mode and SE mode, respectively. Bonded surfaces with bovine teeth were longitudinally sectioned and mirror-polished. Half of the samples were treated with HCl and NaOCl solutions. The interfaces were subjected to argon ion beam etching and then observed by scanning electron microscopy. Results: The thickness of the adhesive layer (AL) of most of the seven universal adhesives and single-step SE adhesives was similar. Universal adhesives in SE mode formed a hybrid smear layer as a high-density zone between the AL and dentin. The thickness of the hybrid layer (HL) of the universal adhesives in ER mode was ∼1–2 μm, with a high-density zone (reaction layer [RL]) below the HL. Conclusion: The morphological features of most universal adhesives in SE mode and single-step SE adhesives are similar. Although resin–dentin interfaces of universal adhesives in ER mode resemble those of ER adhesives, universal adhesives have a distinctive feature, an RL. Significance: The RL might be a sign of chemical bonding even when using universal adhesives in ER mode.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1791-1804 |
| Number of pages | 14 |
| Journal | Dental Materials |
| Volume | 35 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2019 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Dentistry(all)
- Mechanics of Materials
Cite this
SEM observation of novel characteristic of the dentin bond interfaces of universal adhesives. / Takamizawa, Toshiki; Imai, Arisa; Hirokane, Eizo; Tsujimoto, Akimasa; Barkmeier, Wayne W.; Erickson, Robert L.; Latta, Mark A.; Miyazaki, Masashi.
In: Dental Materials, Vol. 35, No. 12, 12.2019, p. 1791-1804.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - SEM observation of novel characteristic of the dentin bond interfaces of universal adhesives
AU - Takamizawa, Toshiki
AU - Imai, Arisa
AU - Hirokane, Eizo
AU - Tsujimoto, Akimasa
AU - Barkmeier, Wayne W.
AU - Erickson, Robert L.
AU - Latta, Mark A.
AU - Miyazaki, Masashi
PY - 2019/12
Y1 - 2019/12
N2 - Objective: The aim of this study was to observe the resin/dentin interfaces of universal adhesives by using scanning electron microscopy (SEM), and to compare their morphologies with conventional etch & rinse (ER) and self-etch (SE) adhesive systems. Methods: Two three-step and one two-step ER adhesives and two two-step and two single-step SE adhesives were used for comparison with seven universal adhesives in ER mode and SE mode, respectively. Bonded surfaces with bovine teeth were longitudinally sectioned and mirror-polished. Half of the samples were treated with HCl and NaOCl solutions. The interfaces were subjected to argon ion beam etching and then observed by scanning electron microscopy. Results: The thickness of the adhesive layer (AL) of most of the seven universal adhesives and single-step SE adhesives was similar. Universal adhesives in SE mode formed a hybrid smear layer as a high-density zone between the AL and dentin. The thickness of the hybrid layer (HL) of the universal adhesives in ER mode was ∼1–2 μm, with a high-density zone (reaction layer [RL]) below the HL. Conclusion: The morphological features of most universal adhesives in SE mode and single-step SE adhesives are similar. Although resin–dentin interfaces of universal adhesives in ER mode resemble those of ER adhesives, universal adhesives have a distinctive feature, an RL. Significance: The RL might be a sign of chemical bonding even when using universal adhesives in ER mode.
AB - Objective: The aim of this study was to observe the resin/dentin interfaces of universal adhesives by using scanning electron microscopy (SEM), and to compare their morphologies with conventional etch & rinse (ER) and self-etch (SE) adhesive systems. Methods: Two three-step and one two-step ER adhesives and two two-step and two single-step SE adhesives were used for comparison with seven universal adhesives in ER mode and SE mode, respectively. Bonded surfaces with bovine teeth were longitudinally sectioned and mirror-polished. Half of the samples were treated with HCl and NaOCl solutions. The interfaces were subjected to argon ion beam etching and then observed by scanning electron microscopy. Results: The thickness of the adhesive layer (AL) of most of the seven universal adhesives and single-step SE adhesives was similar. Universal adhesives in SE mode formed a hybrid smear layer as a high-density zone between the AL and dentin. The thickness of the hybrid layer (HL) of the universal adhesives in ER mode was ∼1–2 μm, with a high-density zone (reaction layer [RL]) below the HL. Conclusion: The morphological features of most universal adhesives in SE mode and single-step SE adhesives are similar. Although resin–dentin interfaces of universal adhesives in ER mode resemble those of ER adhesives, universal adhesives have a distinctive feature, an RL. Significance: The RL might be a sign of chemical bonding even when using universal adhesives in ER mode.
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UR - http://www.scopus.com/inward/citedby.url?scp=85075350523&partnerID=8YFLogxK
U2 - 10.1016/j.dental.2019.10.006
DO - 10.1016/j.dental.2019.10.006
M3 - Article
C2 - 31727447
AN - SCOPUS:85075350523
VL - 35
SP - 1791
EP - 1804
JO - Dental Materials
JF - Dental Materials
SN - 0109-5641
IS - 12
ER -