The effect of DLC-coating deposition method on the reliability and mechanical properties of abutment’s screws

Objective

To characterize the mechanical properties of different coating methods of DLC (diamond-like carbon) onto dental implant abutment screws, and their effect on the probability of survival (reliability).

Fractographic analyses of failed one-piece zirconia implant restorations

Background

Promising results of initial clinical trials with yttria-stabilized zirconia have led to more extensive use of zirconia in dental implant superstructures. The applications have extended to abutments and complex individually designed crown-abutment one-piece structures. Little is known about their clinical success and the primary cause of failures.

Numerical fatigue analysis of premolars restored by CAD/CAM ceramic crowns

Objectives

The purpose of this study was to estimate the fatigue life of premolars restored with two dental ceramics, lithium disilicate (LD) and polymer infiltrated ceramic (PIC) using the numerical method and compare it with the published in vitro data.

An analytical model to design circumferential clasps for laser-sintered removable partial dentures

Objective

Clasps of removable partial dentures (RPDs) often suffer from plastic deformation and failure by fatigue; a common complication of RPDs. A new technology for processing metal frameworks for dental prostheses based on laser-sintering, which allows for precise fabrication of clasp geometry, has been recently developed. This study sought to propose a novel method for designing circumferential clasps for laser-sintered RPDs to avoid plastic deformation or fatigue failure.

Optimization of large MOD restorations: Composite resin inlays vs. short fiber-reinforced direct restorations

Objective

To compare mechanical performance and enamel-crack propensity of direct, semi-direct, and CAD/CAM approaches for large MOD composite-resin restorations.

Fatigue failure load of an adhesively-cemented lithium disilicate glass-ceramic: Conventional ceramic etching vs etch & prime one-step primer

Objectives

To evaluate the effect of different glass-ceramic surface treatments and aging on the fatigue failure load of a lithium disilicate glass-ceramic adhesively cemented to a dentin analogue material.

Impact of yoga on psychopathologies and quality of life in persons with HIV: A randomized controlled study

BackgroundEvidence suggests that individuals with human immunodeficiency virus (HIV) often exhibit poor physical and mental health, which contributes to a reduced Quality of Life (QoL). Yoga is a form of alternative therapy that has positive influences on general health and QoL.ObjectivesThis study examined the effects of yoga on i) anxiety, depression, and psychological well-being and ii) QoL among individuals with an HIV positive status.MethodologySixty individuals with HIV-positive (aged 30–50 years) from rehabilitation centres across Bangalore were randomly assigned to the yoga intervention group (n = 30; 11 men) or the wait-listed control group (n = 30; 10 men). Participants in the yoga group underwent 8 weeks of intense yoga practice performed an hour a day for 5 days a week. The yoga practice consisted of physical postures, breathing practices, relaxation techniques, and meditation. Participants in the wait-listed control group followed their normal routine. Anxiety, fatigue, depression, and QoL were assessed twice for all subjects in each group – once at the start of the study to establish a baseline and once more at the end of the 2-month study period to assess any changes. Data analysis was performed on the assessments using SPSS software version 10.ResultsBetween group analysis demonstrated that a significantly different reduction in anxiety (p < 0.001), depression (p < 0.001), and fatigue (p < 0.001) was observed in the yoga group compared to the control group, as well as significant improvements in well-being (p < 0.001) and all domains of QoL (p < 0.001) in the yoga group compared to the control group.ConclusionThis study indicates that yoga intervention appears to improve the psychological health and QoL of individuals who are HIV-positive. Therefore, based on these findings, yoga may be recommended as a complementary therapy to enhance conventional HIV care.     

手术室护士疲劳程度的影响因素分析

目的：了解手术室护士的疲劳程度、个体特征对其疲劳的影响,为手术室护理管理,缓解护士职业疲劳提供理论依据。方法以随机整群抽样方式,调查长春市4所三级甲等综合医院手术室护士279人,采用一般状况调查表、疲劳评定量表收集资料。结果手术室护士职业疲劳程度处于高水平。不同性别、收入、婚姻状况、受教育情况、学历、年龄的护士所经历的疲劳差异具有统计学意义（ P＜0．05）。结论手术室护士是易感疲劳的群体,应根据其个体特征,有针对性地进行人员管理,缓解职业疲劳。     

Quality of continuous chest compressions performed for one or two minutes

OBJECTIVES:

This study was designed to assess cardiopulmonary resuscitation quality and rescuer fatigue when rescuers perform one or two minutes of continuous chest compressions.

METHODS:

This prospective crossover study included 148 lay rescuers who were continuously trained in a cardiopulmonary resuscitation course. The subjects underwent a 120-min training program comprising continuous chest compressions. After the course, half of the volunteers performed one minute of continuous chest compressions, and the others performed two minutes, both on a manikin model. After 30 minutes, the volunteers who had previously performed one minute now performed two minutes on the same manikin and vice versa.

RESULTS:

A comparison of continuous chest compressions performed for one and two minutes, respectively, showed that there were significant differences in the average rate of compressions per minute (121 vs. 124), the percentage of compressions of appropriate depth (76% vs. 54%), the average depth (53 vs. 47 mm), and the number of compressions with no errors (62 vs. 47%). No parameters were significantly different when comparing participants who performed regular physical activity with those who did not and participants who had a normal body mass index with overweight/obese participants.

CONCLUSION:

The quality of continuous chest compressions by lay rescuers is superior when it is performed for one minute rather than for two minutes, independent of the body mass index or regular physical activity, even if they are continuously trained in cardiopulmonary resuscitation. It is beneficial to rotate rescuers every minute when performing continuous chest compressions to provide higher quality and to achieve greater success in assisting a victim of cardiac arrest.     

MAST Scores, Alcohol Consumption, and Gynecological Symptoms in Endometriosis Patients

Alcohol consumption (quantity, frequency, and pattern) and alcoholrelated problems were determined in endometriosis patients ( n = 137), patients with other gynecological disorders ( n = 91), and normal control subjects ( n = 98). Participants completed a self-administered questionnaire, including the Michigan Alcoholism Screening Test (MAST), questions to determine the quantity and frequency of alcohol use, and questions regarding the relationship between gynecological symptoms and alcohol intake. The percentage of endometriosis patients with MAST scores greater than five or seven was significantly greater than that of normal control subjects ( p = 0.045 and p = 0.009, respectively), but did not differ from that for patients with other gynecological disorders. Endometriosis patients with high MAST scores (≥5) tended to consume more alcohol on a yearly basis than normal control subjects with high MAST scores ( p = 0.07). Among participants who experienced gynecological symptoms and were not abstainers, 31% of endometriosis patients, 9.5% of normal control subjects, and 14.3% of patients with other gynecological disorders reported increasing their alcohol consumption when experiencing gynecological symptoms. Endometriosis patients tended to differ in this regard from normal control subjects ( p = 0.058) and were significantly different from patients with other gynecological disorders ( p = 0.039). The evidence suggests that the gynecological problems of endometriosis may be a major medical correlative of alcoholism in women.