Comparative Evaluation of the Repair Bond Strength of Dental Resin Composite after Sodium Bicarbonate or Aluminum Oxide Air-Abrasion

Author:

Németh Kinga Dorottya1,Told Roland2ORCID,Szabó Péter3,Maróti Péter2ORCID,Szénai Réka1,Pintér Zsolt Balázs4ORCID,Lovász Bálint Viktor5ORCID,Szalma József6ORCID,Lempel Edina1ORCID

Affiliation:

1. Department of Restorative Dentistry and Periodontology, University of Pécs Medical School, Tüzér Street 1, 7623 Pécs, Hungary

2. 3D Printing and Visualization Centre, University of Pécs, Boszorkány Street 2, 7624 Pécs, Hungary

3. János Szentágothai Research Center, Ifjúság Street 12, 7624 Pécs, Hungary

4. Department of Oto-Rhino-Laryngology, Maxillo-Facial and Oral Surgery, St. John’s Hospital and North Buda Unified Hospitals, Diós Árok Street 1–3, 1112 Budapest, Hungary

5. Oral and Maxillofacial Department, Manchester Royal Infirmary Hospital, Manchester University Foundation Trust, Oxford Rd., Manchester M13 9WL, UK

6. Department of Oral and Maxillofacial Surgery, University of Pécs Medical School, Tüzér Street 1, 7623 Pécs, Hungary

Abstract

The dental prophylactic cleaning of a damaged resin-based composite (RBC) restoration with sodium bicarbonate can change the surface characteristics and influence the repair bond strength. The purpose of this study was to compare the effect of sodium bicarbonate (SB) and aluminum oxide (AO) surface treatments on the microtensile bond strength (µTBS) of repaired, aged RBC. Bar specimens were prepared from microhybrid RBC and aged in deionized water for 8 weeks. Different surface treatments (AO air-abrasion; SB air-polishing), as well as cleaning (phosphoric acid, PA; ethylene-diamine-tetraacetic-acid, EDTA) and adhesive applications (single bottle etch-and-rinse, ER; universal adhesive, UA), were used prior to the application of the repair RBC. Not aged and aged but not surface treated RBCs were used as positive and negative controls, respectively. The repaired blocks were cut into sticks using a precision grinding machine. The specimens were tested for tensile fracture and the µTBS values were calculated. Surface characteristics were assessed using scanning electron microscopy. AO-PA-UA (62.6 MPa) showed a 20% increase in µTBS compared to the NC (50.2 MPa), which proved to be the most significant. This was followed by SB-EDTA-UA (58.9 MPa) with an increase of 15%. In addition to AO-PA-UA, SB-EDTA-UA could also be a viable alternative in the RBC repair protocol.

Funder

Hungarian Academy of Sciences

Ministry for Innovation and Technology from the Source of the National Research, Development and Innovation Fund

University of Pécs Medical School

Publisher

MDPI AG

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis

Reference58 articles.

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