Objective To compare the advantages and disadvantages of two fiber post removal methods,guide-supported and ultra-sound assisted,for the removal of fiber posts in molars using in vitro experiments.Methods Twelve human extracted molars were ran-domly divided into a guide group and an ultrasound group for root canal treatment and fiber post restoration.The fiber posts were re-moved using digital guide and ultrasound instruments,respectively.The time of removal of fiber post and the degree of tooth tissue dam-age was compared between two groups.Results The operation time for each tooth in the ultrasound group was(11.14±1.62)minutes,while that in the guide group was(5.40±0.90)minutes.The ultrasound group had a significantly longer duration than the guide group,and the degree of crown damage to dental tissue was also significantly higher than that of the guide group.Conclusion Removing fiber posts with the support of guide can shorten clinical operation time,reduce technical sensitivity,and preserve remaining dental tissue as much as possible.

Objective:To understand the current level of work engagement of new nurses and analyze the relationship between the variables of emotion regulation difficulties, job crafting, and work engagement, to provide a theoretical basis for nursing managers to develop interventions to enhance the level of work engagement of new nurses.Methods:The convenience sampling method was applied to select a total of 637 new nurses from 11 tertiary levels A hospitals in Beijing City, Zhejiang Province, Guangxi Zhuang Autonomous Region, Anhui Province, and Hubei Province from April to June 2022 as the respondents, and the general information questionnaire, Emotion Regulation Difficulties Scale, Job Crafting Scale and Work Engagement Scale were used to conduct a cross-sectional survey. The mediation effect was analyzed by AMOS 26.0 structural equation model.Results:Finally, 626 new nurses were included, and scored (31.08 ± 10.94) points on the Work Engagement Scale, with a mean entry score of (3.45 ± 1.22) points. Work engagement was significantly negatively associated with difficulties in emotion regulation ( r=-0.291, P<0.01) and positively associated with job crafting ( r=0.724, P<0.01). Analysis of mediating effects revealed that job crafting partially mediated the relationship between difficulties in emotion regulation and work engagement ( β=-0.424, P<0.001). Conclusions:New nurses' work engagement was at an intermediate level, and job crafting partially mediated the relationship between emotion regulation difficulties and work engagement. Nursing managers should strengthen training on emotion regulation strategies for new nurses and construct intervention strategies based on job crafting, to improve new nurses′ work engagement.

OBJECTIVE： To improve the proper use of proton pump inhibitors （PPIs） and develop prescription pre-review. METHODS： Among “Hospital Self-Maintenance Rule Base” of “Rational use of drug” in our hospital， according to the application of PPIs in our hospital， the dosage of PPIs under different indications， drug combination， age range and taboo level for children were refined to promote the prescription pre-review. After refinement， the qualified rate of PPIs prescription post-evaluation among outpatient prescriptions， successful rate of pharmacist intervention during pre-prescription review and unqualified prescription rate of each item for 8 PPIs （including “interaction” “clinical diagnosis does not conform to medication” “repeated administration” “inappropriate usage”） were analyzed statistically from Jan. to Aug. 2018. The effects of fined setting were evaluated. RESULTS： From Jan. 2018 to Aug. 2018， the qualified rate of PPIs prescription post-evaluation gradually increased from 81.94％ to 95.10％； successful rate of pharmacist intervention during pre-prescription review increased from 32.75％ to 91.01％； the rate of unqualified prescriptions for 4 items decreased significantly month by month. CONCLUSIONS： The fine setting of the rules for the use of proton pump inhibitors in our hospital has effectively carried out the pre-examination of outpatient prescriptions and promoted the rational use of PPIs.