RETRACTED: Synthesis and characterization of graphene-modified experimental adhesive system for bonding two-piece zirconia abutments: Electron microscopy and Raman spectroscopic analysis (Retracted article. See vol. 125, 2023)

被引：4

作者：

Soliman, M. ^{[1
]}

Saadaldin, S. ^{[2
]}

Aldegheishem, A. ^{[1
]}

Abdull, A. ^{[1
,3
]}

Al-Shma, S. ^{[3
]}

Eldwakhly, E. ^{[1
,4
]}

机构：

[1] Princess Nourah Bint Abdulrahman Univ, Coll Dent, Dept Clin Dent Sci, Riyadh 84428, Saudi Arabia

[2] Western Univ, Schulich Sch Med & Dent, Div Prosthodont, London, ON, Canada

[3] Western Univ, Schulich Sch Med & Dent, London, ON, Canada

[4] Cairo Univ, Dept Fixed Prosthodont, Fac Dent, Cairo, Egypt

来源：

INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 2021年 / 109卷

关键词：

Zirconia; Graphene oxide; Resins; Abutment; Adhesives; ALCOHOL BLEND NANOCOMPOSITES; IMPLANT ABUTMENTS; THERMAL-PROPERTIES; FOLLOW-UP; OXIDE; CONVERSION; TITANIUM; PHOTOPOLYMERIZATION; DURABILITY; INTERFACE;

D O I：

10.1016/j.ijadhadh.2021.102897

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This study aimed to synthesize and characterize graphene oxide (GO) nanoparticles and study the spectral, microbiological, and mechanical analysis of GO in two types of resin adhesives bonded to two-piece zirconia abutments. GO was synthesized and the nanoparticles were characterized using a scanning electron microscope (SEM). Four experimental groups were formed based on weight percentage (0.25 wt% and 0.5 wt%) of GO added in conventional chemically activated resin cement and the other two groups with dual-cure cement. Two nonmodified adhesive groups served as the control groups. Sixty sets of zirconia abutments cemented to screwed titanium bases of implants analogs were divided into 6 groups. Spectral analysis and degree of conversion (DC) were performed using micro-Raman and Fourier-transformed infrared spectroscopy (FTIR). Bacterial viability was studied using the 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazoli-umbromide (MTT) assay over the implant. On SEM analysis, GO (thickness of 1-2 nm thick flakes) nanoparticles were uniformly dispersed throughout the adhesive matrix. Raman and FTIR analysis confirmed the presence of D and G bands. Implant specimens treated with 0.5 wt% GO-modified dual-cure adhesive demonstrated the lowest mean score of DC (38.75 +/- 6.37). After 1 day and 30 days of incubation with dental adhesives, 0.5 wt% GO-modified chemically activated adhesive specimens showed high antibacterial activity; only 23% and 30% of Streptococcus mutans were able to survive after treating with 0.5 wt% GO-modified chemically activated adhesive, respectively. In conclusion, incorporation of 0.5 wt% of GO in both chemically activated and dual-cure adhesive produced superior antimicrobial and physical characteristics for bonding two-piece zirconia abutments to screwed titanium bases.

引用

页数：7