Κυριακή, 4 Δεκεμβρίου 2016

Effect of Recasting of Ni-Cr Base Metal Dental Casting Alloys on the Corrosion Rate, Compositional Changes and Ion Release in Artificial Saliva and Saline Solution

2016-12-04T23-47-03Z
Source: International Journal of Health and Rehabilitation Sciences (IJHRS)
K Jayaprakash, K Harish Kumar Shetty, A Nityananda Shetty, Bantarahalli Thopegowda Nandish, Sowmya Rao..
Background: Environmental concerns are increasing rapidly, and the industry and public are more concerned about natural resources and recycling. Today, it is equally important to take into account cost, ecological factors in production and recycling of materials used in various fields. Purpose: The aim of this study was to evaluate corrosion rate, compositional changes and ion release of recasted Ni-Cr dental casting alloy Materials and Methods: Commercially available Ni -Cr alloy (Bellabond) was used in the study. The recasting was done without any addition of new alloys and recasted up to six times. Corrosion rate was determined by Tafel extrapolation method in artificial saliva in pH 2.3, 6.7 and in 0.9% saline solution at pH 7.3. The compositional changes were studied by Inductively coupled Plasma Atomic emission Spectroscopy (ICP-AES) method. Ion release during storage in artificial saliva and saline solution for one week and four weeks was detected by using atomic absorption spectroscopy (AAS). Results: The corrosion rate was found slightly increased with recasting numbers up to six times. The quantities of ions released increased as the recasting number increases. These changes were not clinically significant. During recasting procedure, there was a change in their alloy compositions, which increases the corrosion rate in recasted alloys. Conclusion: The recasting technique can be accepted in dental practices. This study showed the possibilities of safe usage of recasted alloys up to certain generations in dentistry and in later stages if it is not suitable for dentistry it can be directed to other fields of industries, where the biocompatibility is not a major requirement. This lowers the environmental burden, health hazards and protects imbalance of natural resources


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Gene therapy: In vivo gene editing in non-dividing cells



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Dental implant loss in older versus younger patients: a systematic review and meta-analysis of prospective studies

Abstract

The aim of this systematic review was to evaluate implant loss in younger and older patients. An electronic search of four databases (MEDLINE, EMBASE, SCOPUS and the Cochrane Library) was undertaken until May 2016 without time restriction and was supplemented by manual searching. Prospective cohorts were included if they met the following criteria: (1) presence of an exposed group (older subjects) with a minimum age of 60 years; (2) presence of a control group (younger subjects) with a maximum age of 59 years; and (3) outcome data considering implant survival or loss. Meta-analyses were performed to evaluate the impact of ageing on implant failure. Of 4,152 potentially eligible articles, 4 were included in the qualitative analysis and quantitative synthesis. The pooled estimates suggest that the risk of implant loss in older patients is not significantly higher (RR = 0.92; 95% CI 0.43 – 1.96, p = 0.83) when compared to younger subjects. This systematic review suggests that age is not a limiting factor for dental implant therapy.

This article is protected by copyright. All rights reserved.



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PREGNANCY DETECTING PLANTS USED IN REMO AND IJEBU AREAS OF OGUN STATE, NIGERIA

2016-12-04T14-57-04Z
Source: Journal of Intercultural Ethnopharmacology
Adediwura Fred-Jaiyesimi, Joolade Taiwo.
Aim/Background: Plants and plants extracts are employed in cultures for religious purposes, as beauty therapies, in the detection and management/treatment of diseases. Methodology: In this study, an ethnobotanical studies of plants used in detecting pregnancy in Ijebu and Remo areas of Ogun State were carried out using semi-structured to obtain demographic data, local names of plants, the morphological parts used. Also, a phytochemical analysis of two of the identified plants were carried out. A topical and Urine test of plants in detecting pregnancy were designed to mimic procedures used in traditional medicine for detecting pregnancy. Results: Five plant species were identified belonging to the Araceae, Asteraceae, Convulvulaceae, Nyctaginaceae and Rubiaceae were identified in the survey. The identified plants had the use value (UV) of 0.25 (Culcasia scandens), 0.17 (Ipomoea mauritiana), Boerhavia diffusa while Launea taraxacifolia and Chassalia kolly had the use value of 0.08 respectively. Boerhavia diffusa L, Chassalia kolly (Schumach) Hepper tested positive for the presence of flavonoids, alkaloids and tannins. The onset and duration of symptoms of both Boerhavia diffusa and Chassalia kolly leaves at 2000 and 1000mg were dose dependent. The hexane, ethyl acetate and ethanol extracts of Boerhavia diffusa and Chassalia kolly exhibited pruritus and restlessness in the in vivo model while the urine of pregnant women caused black spots on the leaves of Launea taraxacifolia (Willd) Amin Ex.C. Jeffrey. Conclusion: This study reports a rare knowledge of using plants in detecting pregnancy in the Remo and Ijebu areas of Ogun State, Nigeria.


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Relative costs of anesthesiologist prepared, hospital pharmacy prepared and outsourced anesthesia drugs

Anesthesia drugs can be prepared by anesthesia providers, hospital pharmacies or outsourcing facilities. The decision whether to outsource all or some anesthesia drugs is challenging since the costs associated with different anesthesia drug preparation methods remain poorly described.

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Md. county approves $195K loan to purchase ambulance

This new equipment will replace one of the fire company's current ambulances from 2005 that has about 130,000 miles on it

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Effectiveness Of Blood Transfusion Therapy And Awareness Among Kinfolks Of Thalassemia Patients Visiting A Tertiary Care Hospital In North India

2016-12-04T10-35-00Z
Source: National Journal of Integrated Research in Medicine
Daljit Kaur*, Veena Doda**, Alok Hemal**.
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An Open, Retrospective Study Of Comparison Of Fine Needle Aspiration Cytology (FNAC) And Histopathology Findings In 75 Cases Of Solitary Thyroid Nodule.

2016-12-04T10-35-00Z
Source: National Journal of Integrated Research in Medicine
Hiren Doshi, Meeta Bathla, Atul Kansara.
Background and objectives: Solitary thyroid nodule(STN} is a common clinical entity encountered in routine clinical practice.STN is defined as a single swelling involving either lobe of thyroid or isthmus of thyroid gland. Present study was undertaken to know distribution of lesion according to age and sex, and also to evaluate efficacy of FNAC in diagnosis of clinically obvious and palpable solitary thyroid nodule. Method: This study was done on 75cases operated in our hospital from May 2012 to May 2016. All patients included in the study were submitted to FNAC and ultrasonography. All patients were subjected to surgery and histopathology examination was obtained. Results: Out of 75 cases of thyroid lesions, 63 cases were benign (84%), 6 cases were malignant (8%) and 6 cases were suspicious(8%) on FNAC. On Histopathological examination, 60 cases were benign(80%) and 15 cases were malignant(20%). Conclusion: FNAC is a single best investigation for preoperative evaluation for STN to differentiate between benign and malignant nodules with 88% accuracy rate.[Doshi H NJIRM2016; 7(5):53-55]


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New insights into plant nutrient signaling and adaptation to fluctuating environments

Publication date: 20 November 2016
Source:Journal of Genetics and Genomics, Volume 43, Issue 11
Author(s): Xiangdong Fu




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The relation between radon in schools and in dwellings: A case study in a rural region of Southern Serbia

Publication date: Available online 3 December 2016
Source:Journal of Environmental Radioactivity
Author(s): Z.S. Žunić, P. Bossew, F. Bochicchio, N. Veselinovic, C. Carpentieri, G. Venoso, S. Antignani, R. Simovic, Z. Ćurguz, V. Udovicic, Z. Stojanovska, T. Tollefsen
Recognized as a significant health hazard, radon (Rn) has been given increasing attention for years. Surveys of different kinds have been performed in many countries to assess the intensity and the geographical extent of possible Rn problems. Common surveys cover mainly dwellings, the indoor place with highest occupancy, and schools, where people spend a large fraction of their lifetime and which can also be considered exemplary for Rn exposure at workplaces; it has however been observed that relating them is difficult. It was unclear whether residential Rn at a location, or in a region, can be predicted by Rn at a school of that location, or vice versa. To current knowledge, no general rule seems applicable, as few models to describe the relationship between Rn in dwellings and in schools have been developed.In Southern Serbia, a Rn survey in a predominantly rural region was based on measurements in primary schools. The question arose whether or to which degree the results can be considered as indicative or even representative for residential Rn concentrations. To answer the question an additional survey of indoor Rn concentrations in dwellings was initiated, designed and performed in Sokobanja district in 2010–2012 in a manner to be able to detect a relationship if it exists. In the study region, 108 dwellings in 12 villages and towns were selected, with one primary school each.In this paper, we investigate how a relation between Rn in schools and dwellings could be identified and quantified, by developing a model and using experimental data from both the above main and additional surveys. The key criterion is the hypothesis that the relation dwellings – schools, if it exists, is stronger for dwellings closer to a school than for those dwellings further away. We propose methods to test the hypothesis.As result, the hypothesis is corroborated at 95% significance level. More specifically, on town level (typical size about 1 km), the Rn concentration ratio dwelling/school is about 0.8 (geometrical mean), with geometrical standard deviation (GSD) about 1.9. For dwelling and school hypothetically in the same location, the ratio is estimated about 0.7 with GSD about 1.5.We think that the methodology can be applied to structurally similar problems. The results could be used to create "conditional maps" of Rn concentration in dwellings, i.e., for example a map of probabilities that indoor Rn concentrations in dwellings exceed 100 Bq/m3, as function of Rn concentration in the local school.



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Assessing neuromuscular junction stability from stimulated EMG in children

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Publication date: Available online 3 December 2016
Source:Clinical Neurophysiology
Author(s): Matthew C Pitt, John C Mchugh, Jacquie Deeb, Ralph A Smith
ObjectiveWe present our 9-year experience of stimulated EMG potential analysis using concentric electrodes (SPACE) to evaluate neuromuscular junction (NMJ) disorders in awake children. The technique uses high frequency filtration of stimulated motor unit potentials and applies peak detection software to estimate mean consecutive difference (MCD).MethodsSPACE was carried out in orbicularis oculi of 878 children (377 girls; median age 47 months) between 2007-2015, stimulating the facial nerve with a monopolar cathode. Mean MCD-index (MCD-I) was expressed as a ratio of the measured MCD to the upper normal limit. Diagnostic accuracy was calculated for primary NMJ disorders based on the 660 cases with clinical follow-up data.ResultsPrimary NMJ disorders were present in 106 children, including 46 with genetically confirmed congenital myasthenic syndrome (CMS). Mean MCD-I was two times higher in children with primary NMJ disorders compared to others (205 +/- 108 μs vs 94 +/- 38 μs, p < 0.005). After excluding children with neuronopathies, an MCD-I >100% had 84% sensitivity and 74% specificity for the primary NMJ disorders. Receiver operating characteristics (ROC) curve identified an MCD-I >115% as providing best diagnostic accuracy with sensitivity of 77% and specificity of 84%.ConclusionSPACE is practicable and safe in unsedated children.SignificanceIn combination with routine EMG, it has high diagnostic accuracy and can facilitate recognition of paediatric NMJ transmission disorders.



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