Effect of interfacial surface treatment on bond strength of particulate-filled composite to short fiber-reinforced composite

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dc.contributor.authorTuokko, Jarno
dc.contributor.departmentfi=Hammaslääketieteen laitos|en=Institute of Dentistry|
dc.contributor.facultyfi=Lääketieteellinen tiedekunta|en=Faculty of Medicine|
dc.contributor.studysubjectfi=Hammaslääketieteen syventävät opinnot|en=Dentistry, Advanced Studies|
dc.date.accessioned2023-03-21T15:24:26Z
dc.date.available2023-03-21T15:24:26Z
dc.date.issued2022-12-12
dc.description.abstractAbstract Objective: The aim was to investigate the effect of different interfacial surface treatments on the shear bond strength (SBS) between short fiber-reinforced flowable composite (SFRC) and a particulate-filled flowable composite (PFC). In addition, SBS between two successive layers of similar materials was evaluated. Materials and methods: One-hundred and forty-four specimens were prepared having either SFRC (everX Flow) as substructure composite and PFC (G-aenial Flo X) as surface composite or having one of the two materials as both substructure and surface layer. Eight groups of specimens were created (n=18/per group) according to the interfacial surface protocol used. Group 1: no treatment; Group 2: ethanol one wipe; Group 3: ethanol three wipes; Group 4: phosphoric acid etching + bonding agent; Group 5: hydrofluoric acid etching + bonding agent; and Group 6: grinding + phosphoric acid etching. Group 7: only PFC layers and Group 8 (control) only SFRC layers without any surface treatment. After one-day storage (37 °C) SBS between surface and substructure composite layers was measured in a universal testing machine, and failure modes were visually analyzed. SEM was used to examine the bonding surface of the SFRC composite after surface treatment. SBS values were statistically analyzed with a one-way analysis of variance (ANOVA) followed by Tukey HSD test (α=.05). Results: The SBS between successive SFRC layers (Group 8) was statistically (p<0.05) the highest (43.7 MPa) among tested groups. Surface roughening by grinding followed by phosphoric acid etching (Group 6) resulted in a higher SBS (28.8 MPa) than the remaining surface treatments. Conclusion: Flowable composite with glass fibers (everX Flow) showed higher interlayer SBS compared to PFC flowable composite. Interfacial surface roughness increases the bonding of PFC to the substructure of SFRC. Keywords: Short-fiber reinforced composite, surface treatment, flowable composite, shear bond strength
dc.format.extent23
dc.identifier.olddbid191273
dc.identifier.oldhandle10024/174362
dc.identifier.urihttps://www.utupub.fi/handle/11111/17449
dc.identifier.urnURN:NBN:fi-fe2023031732218
dc.language.isoeng
dc.rightsfi=Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.|en=This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.|
dc.rights.accessrightsavoin
dc.source.identifierhttps://www.utupub.fi/handle/10024/174362
dc.subjectShort-fiber reinforced composite, surface treatment, flowable composite, shear bond strength
dc.titleEffect of interfacial surface treatment on bond strength of particulate-filled composite to short fiber-reinforced composite
dc.type.ontasotfi=Syventävien opintojen kirjallinen työ|en=Second Cycle degree thesis|

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