Abstract
Objective: This study evaluated the interfacial quality of sound and caries-affected primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive. Methods: Non-carious, sound dentin was prepared with water-cooled high-speed diamond burs. Caries-infected dentin was removed with water-cooled low-speed round steel burs and hand instrument. Dentin was bonded with Bond Force (Tokuyama Dental). A nano-indentation tester was employed for determination of hardness (H) and Young's modulus (Y) of resin-dentin interface. Similar resin-dentin interfaces were examined with a SEM/EDX, and with a TEM using ammoniacal silver nitrate tracer for nanoleakage. Results: In the comparison of the H and Y values between the interfacial dentin and the underlying mineralized dentin, no significant difference was seen in caries-affected dentin, however, the values of the interfacial dentin were significantly lower in sound dentin. The H value of the interfacial dentin of sound dentin was significantly lower than that of caries-affected dentin with significantly higher Ca content. No significant difference was observed in the Y values of the interfacial dentin of the two substrates. For both sound and caries-affected dentin, TEM revealed silver deposits in the interfacial dentin and adhesive layer, and smear layer remained within the resin-dentin interface. However, Ca and P contents of the adhesive layer at 10 μm above the dentin surface were the same as those present in the interfacial dentin. Conclusions: Both for sound teeth and caries teeth, Bond Force does not prevent the nanoleakage along the resin-dentin interface.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 214-221 |
| Number of pages | 8 |
| Journal | Journal of Dentistry |
| Volume | 38 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1 2010 |
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Keywords
- Caries-affected dentin
- Hardness
- One-step self-etch adhesive
- Primary tooth dentin
- Self-reinforcing adhesive
- Sound dentin
- Ultrastructure
- Young's modulus
ASJC Scopus subject areas
- Dentistry(all)
Cite this
Hardness, elasticity and ultrastructure of primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive. / Hosoya, Y.; Tay, F. R.; Ono, T.; Miyazaki, M.
In: Journal of Dentistry, Vol. 38, No. 3, 01.03.2010, p. 214-221.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hardness, elasticity and ultrastructure of primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive
AU - Hosoya, Y.
AU - Tay, F. R.
AU - Ono, T.
AU - Miyazaki, M.
PY - 2010/3/1
Y1 - 2010/3/1
N2 - Objective: This study evaluated the interfacial quality of sound and caries-affected primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive. Methods: Non-carious, sound dentin was prepared with water-cooled high-speed diamond burs. Caries-infected dentin was removed with water-cooled low-speed round steel burs and hand instrument. Dentin was bonded with Bond Force (Tokuyama Dental). A nano-indentation tester was employed for determination of hardness (H) and Young's modulus (Y) of resin-dentin interface. Similar resin-dentin interfaces were examined with a SEM/EDX, and with a TEM using ammoniacal silver nitrate tracer for nanoleakage. Results: In the comparison of the H and Y values between the interfacial dentin and the underlying mineralized dentin, no significant difference was seen in caries-affected dentin, however, the values of the interfacial dentin were significantly lower in sound dentin. The H value of the interfacial dentin of sound dentin was significantly lower than that of caries-affected dentin with significantly higher Ca content. No significant difference was observed in the Y values of the interfacial dentin of the two substrates. For both sound and caries-affected dentin, TEM revealed silver deposits in the interfacial dentin and adhesive layer, and smear layer remained within the resin-dentin interface. However, Ca and P contents of the adhesive layer at 10 μm above the dentin surface were the same as those present in the interfacial dentin. Conclusions: Both for sound teeth and caries teeth, Bond Force does not prevent the nanoleakage along the resin-dentin interface.
AB - Objective: This study evaluated the interfacial quality of sound and caries-affected primary tooth dentin bonded with a self-reinforcing one-step self-etch adhesive. Methods: Non-carious, sound dentin was prepared with water-cooled high-speed diamond burs. Caries-infected dentin was removed with water-cooled low-speed round steel burs and hand instrument. Dentin was bonded with Bond Force (Tokuyama Dental). A nano-indentation tester was employed for determination of hardness (H) and Young's modulus (Y) of resin-dentin interface. Similar resin-dentin interfaces were examined with a SEM/EDX, and with a TEM using ammoniacal silver nitrate tracer for nanoleakage. Results: In the comparison of the H and Y values between the interfacial dentin and the underlying mineralized dentin, no significant difference was seen in caries-affected dentin, however, the values of the interfacial dentin were significantly lower in sound dentin. The H value of the interfacial dentin of sound dentin was significantly lower than that of caries-affected dentin with significantly higher Ca content. No significant difference was observed in the Y values of the interfacial dentin of the two substrates. For both sound and caries-affected dentin, TEM revealed silver deposits in the interfacial dentin and adhesive layer, and smear layer remained within the resin-dentin interface. However, Ca and P contents of the adhesive layer at 10 μm above the dentin surface were the same as those present in the interfacial dentin. Conclusions: Both for sound teeth and caries teeth, Bond Force does not prevent the nanoleakage along the resin-dentin interface.
KW - Caries-affected dentin
KW - Hardness
KW - One-step self-etch adhesive
KW - Primary tooth dentin
KW - Self-reinforcing adhesive
KW - Sound dentin
KW - Ultrastructure
KW - Young's modulus
UR - http://www.scopus.com/inward/record.url?scp=76349096475&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=76349096475&partnerID=8YFLogxK
U2 - 10.1016/j.jdent.2009.10.006
DO - 10.1016/j.jdent.2009.10.006
M3 - Article
C2 - 19883724
AN - SCOPUS:76349096475
VL - 38
SP - 214
EP - 221
JO - Journal of Dentistry
JF - Journal of Dentistry
SN - 0300-5712
IS - 3
ER -