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Updated: Jun 20, 2026

Development of a Direct Pulp-capping Model for the Evaluation of Pulpal Wound Healing and Reparative Dentin Formation in Mice
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Resin-dentine interfacial morphology following CPP-ACP treatment.

O A Adebayo1, M F Burrow, M J Tyas

  • 1Melbourne Dental School, University of Melbourne, 720 Swanston Street, Victoria 3010, Australia.

Journal of Dentistry
|September 29, 2009
PubMed
Summary

Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) treatment may affect resin-dentine bond quality, with some adhesives showing increased bond failures. The adhesive system choice is crucial for maintaining interface integrity after CPP-ACP application.

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Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry
  • Biomaterials

Background:

  • The resin-dentine interface is critical for the longevity of dental restorations.
  • Self-etching primer adhesives offer simplified bonding procedures.
  • Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) is used for remineralization and may influence adhesive bonding.

Purpose of the Study:

  • To evaluate the quality of bonded resin-dentine interfaces formed by two self-etching primer adhesives.
  • To compare the effects of CPP-ACP treatment versus no treatment on these interfaces.
  • To assess the influence of smear layer presence and conditioning agents on bond quality.

Main Methods:

  • Thirty-four molars were prepared with different smear layer conditions and treated with CPP-ACP paste or left untreated.

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  • Specimens were conditioned with phosphoric acid, polyacrylic acid, or no acid, then bonded with a 2-step or an all-in-one self-etching primer adhesive.
  • Bonded interfaces were examined using Field Emission Scanning Electron Microscopy (FE-SEM) after 24-h water storage.

    • Main Results:

    • The 2-step adhesive consistently produced a stable resin-dentine interface regardless of smear layer, CPP-ACP treatment, or conditioning.
    • The all-in-one adhesive showed increased bond failures within the hybrid layer, particularly after polyacrylic acid conditioning and CPP-ACP treatment.
    • CPP-ACP treatment appeared to exacerbate bond failures in the 'all-in-one' adhesive group.

    Conclusions:

    • The quality of the bonded resin-dentine interface after CPP-ACP treatment is dependent on the specific adhesive system employed.
    • Careful selection of adhesive systems is recommended when using CPP-ACP treatments to ensure durable restorations.
    • Further research may be needed to elucidate the interaction mechanisms between CPP-ACP and different adhesive materials.