Effect of Er:YAG laser cavity preparation on the bond strength of 2 ‑hydroxyethyl methacrylate‑free and 2‑hydroxyethyl methacrylate‑rich self‑etch adhesive systems: An in vitro study
This study wasdone to evaluate the effect of Er:YAG laser cavity preparation on the microtensile bond strengthof 2 ‑hydroxyethyl methacrylate (HEMA)‑rich and HEMA‑free one‑step self‑etch adhesive systems.Materials and Methods: In this in vitro study, eighty freshly extracted human premolars werecollected. Cavities were prepared in 40 teeth with carbide bur (Group 1) and in other 40 teethwith Er:YAG LASER (490 mJ and 15 Hz) (Group 2). Subgroups of twenty teeth each were madeaccording to the adhesive systems used. After placement of restoration, the mean values of the bondstrength were calculated using universal testing machine. Data were then tabulated and analyzedusing descriptive statistics (Significant at P
Publication date: Available online 5 July 2020Source: Journal of the American College of RadiologyAuthor(s): Eric John Lopez
Publication date: Available online 5 July 2020Source: Journal of the American College of RadiologyAuthor(s): Sunyoung Lee, Yeun-Yoon Kim, Jaeseung Shin, Shin Hye Hwang, Yun Ho Roh, Yong Eun Chung, Jin-Young Choi
A nonprofit organization assessed almost 3,300 hospitals nationwide on 42 metrics. Its new methodology recognized civic leadership, value of care and quality of care as central components of the ranking.
By Matthew Warren As the reality of the coronavirus pandemic set in in March, we looked at the work of psychologists attempting to understand how the crisis is affecting us, and to inform our response to it. A few months later, and hundreds of studies have been conducted or are in progress, examining everything from the spread of conspiracy theories to the characteristics that make people more likely to obey lockdown measures. However, some researchers have raised alarm. They’re worried that many of these rapid new studies are falling prey to methodological issues which could lead to false results and misleading...
Great CBD products start with a meticulous growing, harvesting, processing and formulation process.
Do physicians have an ethical obligation to discuss firearm safety with their patients? What are the perceived barriers to these conversations?Annals of Family Medicine
This case highlights the practice of"body packing" of illicit substances, reviewing the appropriate diagnostic tools to identify foreign bodies even in asymptomatic patients.Applied Radiology
Is erector spinae plane block an effective strategy to improve postsurgical analgesia?BMC Anesthesiology
This study compared two endometrial preparation protocols for frozen embryo transfer. Do they differ significantly in resulting clinical pregnancy rate?Human Reproduction
What can serum calprotectin levels tell us about disease activity and severity in inflammatory rheumatic diseases?Arthritis Research &Therapy