Interfacial morphology and strength of bonds made to superficial versus deep dentin.

M. Yoshiyama, R. Carvalho, H. Sano, J. Horner, P. D. Brewer, David Henry Pashley

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

PURPOSE: To evaluate the interfacial morphology (SEM) of two bonding systems to superficial and deep dentin using a reverse-sandwich technique, coupled with measurement of micro-tensile bond strengths (MTBS). MATERIALS AND METHODDS: Superficial and deep dentin disks were prepared from the same tooth in freshly-extracted human third molars. All-Bond 2 (total etch versus no etch) or Imperva Bond (total etch versus no etch) were applied to superficial versus deep dentin surfaces and the two disks were bonded together into a reverse-sandwich configuration. RESULTS: SEM revealed that All-Bond 2 and Imperva Bond applied under total etch conditions formed thicker resin-infiltrated layers (4-8 micrometers) on deep dentin than on superficial dentin (2-4 micrometers), and that All-Bond 2 and Imperva Bond applied to unetched dentin formed very thin resin-infiltrated layers (less than 0.5 micrometers) on both dentin substrates. MTBS of All-Bond 2 and Imperva Bond were more than 20 MPa irrespective of dentin depth and were not significantly different. Without acid etching, the MTBS of both systems to deep dentin was significantly lower than to superficial dentin. These results suggested that for the total-etch systems, dentin depth affected the thickness of the resin-infiltrated layer, but the thickness of the resin-infiltrated layer had no significant relationship with MBTS. The present data also indicated that the acid-etch technique could prevent the decrease of bond strength seen in deep dentin in the absence of etching.

Original languageEnglish (US)
Pages (from-to)297-302
Number of pages6
JournalAmerican Journal of Dentistry
Volume8
Issue number6
StatePublished - Jan 1 1995

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Dentin
Tensile Strength
Acids
Third Molar
Tooth

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Yoshiyama, M., Carvalho, R., Sano, H., Horner, J., Brewer, P. D., & Pashley, D. H. (1995). Interfacial morphology and strength of bonds made to superficial versus deep dentin. American Journal of Dentistry, 8(6), 297-302.

Interfacial morphology and strength of bonds made to superficial versus deep dentin. / Yoshiyama, M.; Carvalho, R.; Sano, H.; Horner, J.; Brewer, P. D.; Pashley, David Henry.

In: American Journal of Dentistry, Vol. 8, No. 6, 01.01.1995, p. 297-302.

Research output: Contribution to journalArticle

Yoshiyama, M, Carvalho, R, Sano, H, Horner, J, Brewer, PD & Pashley, DH 1995, 'Interfacial morphology and strength of bonds made to superficial versus deep dentin.', American Journal of Dentistry, vol. 8, no. 6, pp. 297-302.
Yoshiyama M, Carvalho R, Sano H, Horner J, Brewer PD, Pashley DH. Interfacial morphology and strength of bonds made to superficial versus deep dentin. American Journal of Dentistry. 1995 Jan 1;8(6):297-302.
Yoshiyama, M. ; Carvalho, R. ; Sano, H. ; Horner, J. ; Brewer, P. D. ; Pashley, David Henry. / Interfacial morphology and strength of bonds made to superficial versus deep dentin. In: American Journal of Dentistry. 1995 ; Vol. 8, No. 6. pp. 297-302.
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