Significance of immediate dentin sealing and flowable resin coating reinforcement for unfilled/lightly filled adhesive systems
Marco Aurélio de Carvalho DDS, MSc, PhD
Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil
Search for more papers by this authorCorresponding Author
Priscilla Cardoso Lazari-Carvalho DDS, MSc, PhD
Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil
Correspondence
Priscilla Cardoso Lazari-Carvalho, Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil.
Email: [email protected]
Search for more papers by this authorIsabella Fonseca Polonial DDS, MSc
Department of Prevention and Oral Rehabilitation, School of Dentistry, University of Goiás, Goiânia, Brazil
Search for more papers by this authorJoão Batista de Souza DDS, MSc, PhD
Department of Prevention and Oral Rehabilitation, School of Dentistry, University of Goiás, Goiânia, Brazil
Search for more papers by this authorPascal Magne DMD, MSc, PhD
The Don & Sybil Harrington Professor of Esthetic Dentistry, Division of Restorative Sciences, Ostrow School of Dentistry, University of Southern California, Los Angeles, California, USA
Search for more papers by this authorMarco Aurélio de Carvalho DDS, MSc, PhD
Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil
Search for more papers by this authorCorresponding Author
Priscilla Cardoso Lazari-Carvalho DDS, MSc, PhD
Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil
Correspondence
Priscilla Cardoso Lazari-Carvalho, Department of Oral Rehabilitation, School of Dentistry, University of Anápolis, Anápolis, Brazil.
Email: [email protected]
Search for more papers by this authorIsabella Fonseca Polonial DDS, MSc
Department of Prevention and Oral Rehabilitation, School of Dentistry, University of Goiás, Goiânia, Brazil
Search for more papers by this authorJoão Batista de Souza DDS, MSc, PhD
Department of Prevention and Oral Rehabilitation, School of Dentistry, University of Goiás, Goiânia, Brazil
Search for more papers by this authorPascal Magne DMD, MSc, PhD
The Don & Sybil Harrington Professor of Esthetic Dentistry, Division of Restorative Sciences, Ostrow School of Dentistry, University of Southern California, Los Angeles, California, USA
Search for more papers by this authorFunding information: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Grant/Award Number: 150054/2018-1
Abstract
Background
Immediate dentin sealing implies applying an adhesive system to dentin directly after tooth preparation, before impression. The technique is universal (inlays, onlays, veneers, crowns) and well documented clinically and experimentally. Different types of dentin bonding agents (DBAs) are available on the market. Major differences lie in the thickness of the hybrid layer and overlaying adhesive resin (filled vs. unfilled/lightly filled adhesives).
Objective
The objective of this work is to provide precise clinical instructions and present new experimental data about the bond strength of five DBAs (Optibond FL, Scotchbond MP, Single Bond Plus, Clearfil SE Bond, and Scotchbond Universal) used conventionally (dentin sealed at the time of restoration delivery) or with immediate dentin sealing, as well as with an additional flowable resin coating.
Methods
Seventy-five human molars were selected, restored/tested according the microtensile bond strength method. Fifteen groups (n=5) were obtained from the combination of the five DBAs and three application modes: delayed dentin sealing, immediate dentin sealing and immediate dentin sealing with flowable resin coating.
Results
It appears that immediate dentin sealing was confirmed to significantly improve the bond strength of all tested adhesives. The use of a flowable resin coating reinforcement after immediate dentin sealing increased the microtensile bond strength of all unfilled/lightly filled adhesives (from 233% of increase for ScotchBond MP, up to 560% for Clearfil SE Bond) and maintained the performance of the 3-step golden standard adhesive. Optibond FL used with (52.51 MPa) or without (54.75 MPa) additional flowable resin coating and Clearfil SE Bond (45.64 MPa) used with flowable resin coating provided the best results.
Clinical Significance
The original immediate dentin sealing (IDS) technique implies the use of a filled DBA. With unfilled/lightly filled adhesives, it is suggested to reinforce IDS with an additional flowable resin coating. This seems especially paramount to the performance of simplified adhesive systems to protect the thin bonding interface from oxygen inhibition and preserve IDS layer during predelivery cleaning of the preparation. The clinical reinforcement of unfilled/lightly filled IDS with flowable resin composite is encouraged for more predictable bonding.
Open Research
DATA AVAILABILITY STATEMENT
Data available on request from the authors.
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