PMID- 32370001
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200928
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 13
IP  - 9
DP  - 2020 May 1
TI  - Influence of Oxidation of Copper on Shear Bond Strength to an Acrylic Resin Using 
      an Organic Sulfur Compound.
LID - 10.3390/ma13092092 [doi]
LID - 2092
AB  - The aim of this study was to clarify the influence of the copper surfaces changed 
      from Cu or Cu(2)O to CuO on the bonding strength of resin with organic sulfur 
      compounds. The disk-shaped specimens (n = 44) of copper were wet-ground. Half of 
      the specimens were heated at 400  degrees C for 4 min in an electric furnace (HT: 
      heated). Half of the specimens were not heated (UH: unheated). The specimens were 
      further divided into two groups. Each group was primed by 6-methacryloyloxyhexyl 
      2-thiouracil-5-carboxylate (MTU-6) or unprimed (n = 11). A statistical analysis 
      of the results of shear bond strength testing was performed, and the failure mode 
      of the bonded areas was classified with an optical microscope. Two types of 
      specimen surface (UH or HT) were analyzed chemically using X-ray photoelectron 
      spectroscopy (XPS). When primed with MTU-6, unheated Cu (28.3 MPa) showed greater 
      bond strength than heated (19.1 MPa). When unprimed, heated Cu (4.1 MPa) showed 
      greater bond strength than unheated (2.3 MPa). The results of the debonded 
      surfaces observation showed that only the UH-MTU-6 group demonstrated a 
      combination of adhesive and cohesive failures in all specimens. The XPS results 
      showed that the surface of copper changed from Cu or Cu(2)O to CuO when HT. These 
      results confirmed that it is necessary to take care of the copper oxide contained 
      in noble metal alloys when using organic sulfur compounds for adhesion.
FAU - Hiraba, Haruto
AU  - Hiraba H
AUID- ORCID: 0000-0002-1328-6648
AD  - Department of Fixed Prosthodontics, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Advanced Dental Treatment, Dental Research Center, Nihon University 
      School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
FAU - Koizumi, Hiroyasu
AU  - Koizumi H
AUID- ORCID: 0000-0002-6160-2692
AD  - Department of Dental Materials, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Biomaterials Science, Dental Research Center, Nihon University School 
      of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The 
      University of Hong Kong, Hong Kong SAR 999077, China.
FAU - Kodaira, Akihisa
AU  - Kodaira A
AD  - Department of Fixed Prosthodontics, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Advanced Dental Treatment, Dental Research Center, Nihon University 
      School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
FAU - Nogawa, Hiroshi
AU  - Nogawa H
AD  - Department of Fixed Prosthodontics, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Advanced Dental Treatment, Dental Research Center, Nihon University 
      School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
FAU - Yoneyama, Takayuki
AU  - Yoneyama T
AD  - Department of Dental Materials, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Biomaterials Science, Dental Research Center, Nihon University School 
      of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
FAU - Matsumura, Hideo
AU  - Matsumura H
AD  - Department of Fixed Prosthodontics, Nihon University School of Dentistry, 1-8-13, 
      Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
AD  - Division of Advanced Dental Treatment, Dental Research Center, Nihon University 
      School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
LA  - eng
GR  - 19K19142/Japan Society for the Promotion of Science (JSPS) KAKENHI/
GR  - Sato Fund/Nihon University School of Dentistry/
PT  - Journal Article
DEP - 20200501
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC7254407
OTO - NOTNLM
OT  - acrylic resin
OT  - bond strength
OT  - dental metal
OT  - organic sulfur compound
OT  - oxide film
COIS- The authors declare no conflicts of interest with any product or company that is 
      presented in this article.
EDAT- 2020/05/07 06:00
MHDA- 2020/05/07 06:01
PMCR- 2020/05/01
CRDT- 2020/05/07 06:00
PHST- 2020/04/08 00:00 [received]
PHST- 2020/04/23 00:00 [revised]
PHST- 2020/04/26 00:00 [accepted]
PHST- 2020/05/07 06:00 [entrez]
PHST- 2020/05/07 06:00 [pubmed]
PHST- 2020/05/07 06:01 [medline]
PHST- 2020/05/01 00:00 [pmc-release]
AID - ma13092092 [pii]
AID - materials-13-02092 [pii]
AID - 10.3390/ma13092092 [doi]
PST - epublish
SO  - Materials (Basel). 2020 May 1;13(9):2092. doi: 10.3390/ma13092092.