| ORIGINAL ARTICLE |
|
| Year : 2022 | Volume
: 13
| Issue : 4 | Page : 356-362 |
|
|
Evaluation of bond durability, surface morphology, and remineralization at the adhesive interface with dentin bonding agents modified with silica-doped nanohydroxyapatite
Prasanthi Gonapa1, Girija S Sajjan2, Arun Bhupathi3, Uday K Podugu4, Suvarna Sundar1, Durgabhavani Gondi1, R Tejasree Rathod1
1 Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Kadapa, Andhra Pradesh, India
2 Department of Conservative Dentistry and Endodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
3 Department of Nanotechnology, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
4 Department of Conservative Dentistry and Endodontics, Army College of Dental Sciences, Secunderabad, Andhra Pradesh, India
Correspondence Address:
Dr. Girija S Sajjan
Department of Conservative Dentistry and Endodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/ccd.ccd_321_21
|
|
|
Objectives: To compare and evaluate the bond durability, surface morphology, and remineralization of the adhesive layer with newer adhesive systems modified with novel bioactive nanoparticles. Methodology: Bonding agents evaluated in this study include (a) Conventional dentin bonding agent (CN-DBA) (b) Nanohydroxyapatite (nanoHAP) incorporated dentin bonding agent (NH DBA); (c) Silica doped nanohydroxyapatite (Si nanoHAP) incorporated dentin bonding agent (Si NH DBA). A total of 104 human dentin discs (5 mm × 5 mm × 2 mm) were sectioned. Elemental analysis (Ca/P ratio) and surface morphology of the adhesive layer with different dentin adhesives were evaluated under scanning electron microscopy with energy-dispersive X-ray analysis after speculated storage time of 1 day and 6 months. Microshear bond strength of adhesive restorations with different dentin adhesives was evaluated under universal testing machine and fractographic analysis under scanning electron microscope after speculated storage time of 1 day and 6 months. The results were analyzed using analysis of variance and post hoc analysis. Results: Si-NH-DBA showed highest mean microshear bond strength for both 1 day and 6 months, which was significantly higher compared to conventional nanofilled dentin bonding agent (CN-DBA) and NH-DBA. Si-NH-DBA group showed only 10% reduction in bond strength after 6 months, which was less compared to that of other groups. Similarly, Si-NH-DBA showed higher remineralization with stellate-shaped crystals at the adhesive layer after 6 months with hydrolytic resistant hybrid layer, compared to CN-DBA and NH-DBA. Conclusion: Silica-doped nanohydroxyapatite proved its efficiency on bond stability, remineralization, and hydrolytic resistance when incorporated into dentin bonding agents because of its bioactivity and carbonate-containing apatite-forming ability.
|
|
|
|
| [FULL TEXT] [PDF]* |
|
 |
|
