2,3,5,4'-Tetrahydroxystilbene-2-O-β-glucoside treatment enhanced the renewal ability and proliferative potential of hDPSCs via the AMPK/ERK/SIRT1 axis, which may provide a novel autogenic cell-based therapeutic strategy in regenerative dentistry.

The purpose of this study was to evaluate the effects of various surface treatments on the bond strength at the In-Ceram/resin composite interface. Ninety-eight In-Ceram specimens were divided into seven groups and exposed to various surface treatments as follows: (A) control (B) saliva contamination (C) saliva contamination plus aluminum oxide sandblasting (D) glove powder contamination (E) glove powder contamination plus aluminum oxide sandblasting (F) rough aluminum oxide sandblasting and (G) excess glass infiltration. A resin composite cylinder was cemented to each In-Ceram specimen with Panavia 21 resin luting cement. Half of the cemented specimens in each group were stored in water for 24 h, and the other half were stored in water for 2 weeks and then were thermo-cycled for 2000 cycles. Shear bond strengths (SBS) of seven specimens in each subgroup were determined and analysed using analysis of variance (ANOVA) and Tukey HSD test as well as Student's t-test. Scanning electronic microscopy was used to identify the type of bond failure. Shear bond strength was significantly decreased by saliva and glove powder contaminations (P < 0.05). Sandblasting treatment did not improve the saliva-contaminated specimens. However, the glove powder plus sandblasting group showed no significant difference in SBS compared with the control group. There was no significant difference in SBS between the excess glass-infiltrating group and the control group. The SBS was significantly decreased by rough aluminum oxide sandblasting (P < 0.05). The SBS values of groups without thermocycling were significantly greater than those of groups with thermocycling (P < 0.05). There were no significant differences among SBS values of the seven groups with thermocycling. Combined cohesive and adhesive bond failures were seen in every group. Various surface treatments or contaminants may significantly influence the bond strength of In-Ceram restorative in clinical use.

The present study used the acoustic ing device. The results were analysed by ANOVA and Tukey LSD test. UTS at different temperatures emission (AE) technique to evaluate interactions among soldering temperature, flux treatment, and showed no significant difference according to either mechanical or acoustic results. But in the 1200°C the resultant ultimate tensile strength (UTS). Scangroup, the UTSs and AE counts showed significant ning electron microscopy (SEM) was used to examine fracture surfaces of the solder joints. Specimens differences (PB 0·05) at both flux concentrations. SEM showed that the 1200C group had better denwere cast from removable partial denture alloy and then placed in a jig with a gap distance of 1·0 mm. dritic crystal structure than did the 1150°C group. A high-frequency soldering machine with an optiIn the 1200°C group specimens with 67% flux had fewer flux inclusion bodies and dendritic crystals cal pyrometer was used for soldering at 1150°C and 1200°C, respectively. The flux concentrations were than did specimens with 75% flux. The 75% flux subgroup produced high-amplitude (60-70 dB) 67% and 75%. The soldered specimens were subacoustic signals within the elastic deformation jected to tensile test at a crosshead speed of zone, while the 67% flux subgroup produced similar 0·05 mm/min. During testing, acoustic emissions in signals within the plastic deformation zone, either the frequency range of 100-1200 kHz were colbeyond the 0·2% yield point or before fracture. lected, filtered, recorded, and processed by a sens-