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- Title
Bonding performance of dispersed filler resin composite CAD/CAM blocks with different surface treatment protocols.
- Authors
ABDOU, Ahmed; TAKAGAKI, Tomohiro; ALGHAMDI, Ali; TICHY, Antonin; NIKAIDO, Toru; TAGAMI, Junji
- Abstract
The effect of various pretreatments on the bonding of a resin cement to resin-composite CAD/CAM blocks (RCBs) was examined. The surface of dispersed-filler RCBs (DF-RCBs) and a polymer infiltrated ceramic network RCB (PICN-RCB) was roughened using hydrofluoric acid etching (HF) or sandblasting, and followed by silanization and/or universal adhesive (UA) application. Microtensile bond strength (µTBS), surface roughness parameters (arithmetical mean height (Sa); developed interfacial area ratio (Sdr)), and critical surface energy (γc) were determined. For most DF-RCBs, the highest µTBS was obtained using HF+UA. UA application to DFRCBs resulted in similar or higher µTBS compared to silanization, which indicates that silane treatment is not crucial for DF-RCBs, especially after HF. In contrast, the highest µTBS to PICN-RCB was obtained with silanization. Both roughening pretreatments significantly increased the surface roughness parameters and the γc of all RCBs. The γc was positively correlated with Sa (r=0.756, p<0.001) and Sdr (r=0.837, p<0.001).
- Subjects
SURFACE preparation; MEDICAL protocols; SURFACE energy; SURFACE roughness; HYDROFLUORIC acid
- Publication
Dental Materials Journal, 2021, Vol 40, Issue 1, p209
- ISSN
0287-4547
- Publication type
Article
- DOI
10.4012/dmj.2020-049