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Effect of mucoprotein on the bond strength of resin composite to human dentin

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Abstract

The purpose of this study was to test the bond strength and analyze the morphology of the dentin-adhesive interface of two etch and rinse and two self-etch adhesive systems with two kinds of artificial saliva (with and without 450 mg/L mucin) contamination under different conditions of decontaminating the interface. Bonded specimens were sectioned perpendicularly to the bonded surface in 1-mm thick slabs. These 1-mm thick slabs were remounted in acrylic blocks and sectioned in sticks perpendicular to the bonding interfaces with a 1-mm2 area. Nine specimens from each condition were tested after 24 h on a testing machine (Instron) at a speed of 0.5 mm/min for a total of 360 specimens. Mean and standard deviations of bond strength (MPa) were calculated. ANOVA showed significant differences as well as Fisher’s PLSD intervals (p < 0.05). The following values are the results for different groups: Control group 34–60 MPa, saliva without mucin 0–52 MPa, and saliva with mucin 0–57 MPa. Failure sites were mixed and adhesive failure was common for the low bond strength results. P&BNT with ideal conditions and following the manufacturer’s instructions (control) had the highest bond strengths and the dentin-adhesive interface exhibited an ideal morphology of etch-and-rinse system. SEM gave complementary visual evidence of the effect in the dentin/adhesive interface structure with some contaminated conditions compared with their respective control groups. This in vitro artificial saliva model with and without mucin showed that an organic component of saliva could increase or decrease the bond strength depending on the specific bonding agent and decontamination procedure.

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Acknowledgments

The authors wish to acknowledge UMKC-CRISP and the Electron Microscopy Laboratory in the Department of Oral Biology at the UMKC School of Dentistry, Denstply/Caulk, 3M-ESPE, Kuraray America, NIH/NIDCR T32 DE07204 and T32 DE07306, and the Biomaterials Research Center at the University of Texas-Houston for supporting this study, Larry Watanabe, Clarice Thenard from UCSF School of Dentistry.

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Authors and Affiliations

  1. Department of Preventive and Restorative Dentistry, University of California, San Francisco, 707 Parnassus Avenue Room 3212, San Francisco, CA, 94143-0758, USA

    Lilliam Marie Pinzon

  2. Department of Restorative Dentistry and Biomaterials, The University of Texas Dental Branch at Houston, Houston, TX, USA

    John M. Powers & Kathy L. O’Keefe

  3. The University of Missouri, Kansas City, MI, USA

    Vladimir Dusevish

  4. Department of Mechanical Engineering, The University of Kansas, Lawrence, KS, USA

    Paulette Spencer

  5. Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, The University of California, San Francisco, San Francisco, CA, USA

    Grayson W. Marshall

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  1. Lilliam Marie Pinzon
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  2. John M. Powers
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  3. Kathy L. O’Keefe
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  4. Vladimir Dusevish
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  5. Paulette Spencer
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  6. Grayson W. Marshall
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Correspondence to Lilliam Marie Pinzon.

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Pinzon, L.M., Powers, J.M., O’Keefe, K.L. et al. Effect of mucoprotein on the bond strength of resin composite to human dentin. Odontology 99, 119–128 (2011). https://doi.org/10.1007/s10266-011-0002-9

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  • DOI: https://doi.org/10.1007/s10266-011-0002-9

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