Biomechanical evaluation between orthodontic attachment and three different materials after various surface treatments: A three-dimensional optical profilometry analysis

Objectives:To determine the best bonding method of orthodontic attachment among monolithic zirconia, feldspathic porcelain, hybrid porcelain, and the impact of surface-conditioning methods using a three-dimensional optical profilometer after debonding.Materials and Methods:56 feldspathic porcelain, 56 monolithic zirconia, and 56 hybrid porcelain samples were divided into four surface treatment subgroups: (1) hydrofluoric (HF) acid etch + silane, (2) Al₂O₃ sandblasting + silane, (3) silicoating (SiO₂), and (4) diamond bur + silane. The specimens were tested to evaluate shear bond strength (SBS). Residual composite was removed after debonding. Three-dimensional white-light interferometry was used to obtain quantitative measurements on surface roughness.Results:The highest SBS value was found for the HF acid–etched feldspathic porcelain group. The average surface roughness values were significantly higher in all material groups in which diamond bur was applied, while roughening with Cojet provided average surface roughness values closer to the original material surface.Conclusions:Variations in structures of the materials and roughening techniques affected the SBS and surface roughness findings.     

Van der Woude syndrome.

Van der Woude syndrome (VWS) is an autosomal dominant craniofacial syndrome with variable expression characterised by congenital pits and sinuses in the lower lip together with cleft lip, or palate, or both. We report a case of VWS, which occurred as a new mutation, and review previous reports.     

Mandibular midline distraction using a simple device.

OBJECTIVE: Mandibular midline distraction osteogenesis represents a new option for creation of intra-arch space in the mandibular arch. The aim of this paper is to introduce a simple device (hyrax expander) and method for mandibular midline distraction. STUDY DESIGN: The sample consisted of 24 patients (mean age: 18.07 years) treated with mandibular midline distraction. Hyrax expanders were used as symphyseal distractors, and distraction procedure was carried out with a rate of 1 mm and rhythm of twice daily. RESULTS: Mandibular midline distraction was completed successfully in all patients and the distraction amount was 7.01 mm. No major complication other than mild mucosal irritation and gingival recession was observed. CONCLUSION: The presented method is a viable option for mandibular midline distraction osteogenesis.     

Outcomes of surgical and nonsurgical management of persistent fetal vasculature

In a retrospective study of 54 eyes with persistent fetal vasculature (PFV), 34 eyes underwent pars plicata lensectomy and vitrectomy and 5 eyes has translimbal lensectomy and vitrectomy. Six of these eyes were inoperable. Fifteen eyes were managed nonsurgically. Measured outcomes were visual improvement and cosmetic acceptability. In 10 (30.3%) of 33 surgically treated eyes, vision improved. Statistically, no factor except sex and bilateral PFV (cosmetic unacceptability) could predict treatment results. Presented in part at the American Academy of Ophthalmology Annual Meeting, San Francisco, Calif., October 28, 1997. The authors have stated that they do not have a significant financial interest or other relationship with any product manufacturer or provider of services discusser in this article.     

Cupping therapy can improve the quality of life of healthy people in Tehran

Objective

To examine the influence of cupping on the quality of life of healthy people who referred to traditional Persian medicine clinics in Tehran.

Water Quality Planning in Rivers: Assimilative Capacity and Dilution Flow

Population growth, urbanization and industrial expansion are consequentially linked to increasing pollution around the world. The sources of pollution are so vast and also include point and nonpoint sources, with intrinsic challenge for control and abatement. This paper focuses on pollutant concentrations and also the distance that the pollution is in contact with the river water as objective functions to determine two main necessary characteristics for water quality management in the river. These two necessary characteristics are named assimilative capacity and dilution flow. The mean area of unacceptable concentration \(\left( {\overline {{{c_a}}} } \right)\) and affected distance (X) are considered as two objective functions to determine the dilution flow by a non-dominated sorting genetic algorithm II (NSGA-II) optimization algorithm. The results demonstrate that the variation of river flow discharge in different seasons can modify the assimilation capacity up to 97%. Moreover, when using dilution flow as a water quality management tool, results reveal that the content of \(\left( {\overline {{{c_a}}} } \right)\) and X change up to 97% and 93%, respectively.     

A systematic review of health care workers' knowledge and related factors towards burn first aid

The present systematic review was conducted to investigate the knowledge of health care workers (HCWs) regarding first aid in burns. A comprehensive, systematic search was performed in different international electronic databases, such as Scopus, PubMed, Web of Science, and Persian electronic databases such as Iranmedex, and Scientific Information Database using keywords extracted from Medical Subject Headings such as ‘Knowledge’, ‘First aid’, ‘Health personnel’ and ‘Burns’ from the earliest to 1 February 2023. The appraisal tool for cross-sectional studies (AXIS tool) evaluates the quality of the included studies. A total of 3213 HCWs participated in seven cross-sectional studies. Of the HCWs, 44.50% were physicians. The studies included in this systematic review were conducted in Saudi Arabia, Australia, Turkey, the UK, Ukraine, and Vietnam. The knowledge rate of HCWs related to first aid for burns was 64.78 out of 100, which indicates their relatively desirable knowledge. The factors of first aid training experience, age, and experienced burn traumas had a significant positive effect on the knowledge of HCWs related to first aid for burns. Also, factors such as gender, nationality, marital status, and job position had a significant relationship with the knowledge of HCWs about first aid for burns. Therefore, it is suggested that health care managers and policymakers implement training programs and practical workshops related to first aid, especially first aid for burns.     

The Effect of Lenalidomide on Health-Related Quality of Life in Patients With Lower-Risk Non-del(5q) Myelodysplastic Syndromes: Results From the MDS-005 Study

Background

The phase III MDS-005 study compared lenalidomide versus placebo in red blood cell transfusion-dependent (RBC-TD) patients with lower-risk non-del(5q) myelodysplastic syndromes (MDS), ineligible/refractory to erythropoiesis-stimulating agents. Lenalidomide-treated patients were more likely to achieve transfusion independence (TI) ≥ 8 weeks (26.9% vs. 2.5%; P < .001) and hemoglobin increase ≥ 1.5 g/dL (19.4% vs. 2.5%) versus placebo.