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Hydroxyapatite-based dental inserts: microstructure, mechanical properties, bonding efficiency and fracture resistance of molars with occlusal restorations
dc.creator | Matić, Tamara | |
dc.creator | Ležaja Zebić, Maja | |
dc.creator | Miletić, Vesna | |
dc.creator | Trajković, Isaak | |
dc.creator | Milošević, Miloš | |
dc.creator | Racić, Aleksandar | |
dc.creator | Veljović, Đorđe | |
dc.date.accessioned | 2023-10-09T12:10:14Z | |
dc.date.available | 2023-10-09T12:10:14Z | |
dc.date.issued | 2024 | |
dc.identifier.issn | 1552-4973 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6659 | |
dc.description.abstract | This study aimed to (1) comparatively analyze properties of Sr- and Mg-substituted hydroxyapatite (HAP)-based dental inserts; (2) evaluate insert bonding to restorative materials, and (3) evaluate the effect of doped HAP inserts on fracture resistance (FR) of human molars with large occlusal restorations. By ion-doping with Sr or Mg, 3 insert types were obtained and characterized using XRD, SEM, Vickers hardness and fracture toughness. Shear bond strength (SBS) was determined between acid etched or unetched inserts and following materials: Maxcem cement (Kerr); Filtek Z250 (3M) bonded with Single Bond Universal (SBU; 3M) or Clearfil Universal (Cf; Kuraray). Modified Class I cavities were prepared in 16 intact molars and restored using insert + composite or composite only (control) (n = 8/group). FR of restored molars was determined by static load until fracture upon thermal cycling. Fracture toughness was similar between Sr/Mg-doped inserts (0.94–1.04 MPam 1/2 p = .429). Mg-doped inserts showed greater hardness (range 4.78–5.15 GPa) than Sr6 inserts (3.74 ± 0.31 GPa; p < .05). SBS for SBU and Cf adhesives (range 7.19–15.93 MPa) was higher than for Maxcem (range 3.07–5.95 MPa) (p < .05). There was no significant difference in FR between molars restored with insert-containing and control restorations (3.00 ± 0.30 kN and 3.22 ± 0.42 kN, respectively; p > .05). HAP-based inserts doped with Mg/Sr had different composition and mechanical properties. Adhesive bonding to inserts resulted in greater bond strength than cementation, which may be improved by insert acid-etching. Ion-doped HAP inserts did not affect FR of restored molars. In conclusion, HAP-based dental inserts may potentially replace dentin in large cavities, without affecting fracture resistance of restored teeth. | sr |
dc.language.iso | en | sr |
dc.publisher | Wiley Periodicals LLC. | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200287/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200135/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200129/RS// | sr |
dc.rights | restrictedAccess | sr |
dc.source | Journal of Biomedical Materials Research Part B: Applied Biomaterials | sr |
dc.subject | dental insert | sr |
dc.subject | dentin substitute | sr |
dc.subject | fracture resistance | sr |
dc.subject | hydroxyapatite | sr |
dc.subject | ion-doping | sr |
dc.subject | occlusal restorations | sr |
dc.title | Hydroxyapatite-based dental inserts: microstructure, mechanical properties, bonding efficiency and fracture resistance of molars with occlusal restorations | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.issue | 1 | |
dc.citation.rank | M22 | |
dc.citation.spage | e35331 | |
dc.citation.volume | 112 | |
dc.identifier.doi | 10.1002/jbm.b.35331 | |
dc.identifier.scopus | 2-s2.0-85173531608 | |
dc.type.version | publishedVersion | sr |