bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dentinal crack formation during root canal preparations by the twisted file adaptive, Reciproc and WaveOne instruments
Authors: Gergi Richard M. , Osta Nada E. , Naaman Alfred S. 
Published: April 2016

ABSTRACT
Objective: This study aimed to compare the frequency of dentinal microcracks after root canal shaping with 2 reciprocating (Reciproc and WaveOne) and 1 combined continuous reciprocating motion twisted files adaptive (TFA) rotary system. Materials and Methods: Ninety molars were chosen and divided into three groups of 30 each. Root canal preparation was achieved by using Reciproc R25, Primary WaveOne and TFA systems. All the roots were horizontally sectioned at 15, 9, and 3 mm from the apex. The slices were then viewed each under a microscope at × 25 magnification to determine the presence of cracks. The absence/presence of cracks was recorded, and the data were analyzed with a Chi-square test. The significance level was set at P < 0.05. Results: Instrumentation with Reciproc produced significantly more complete cracks than WaveOne and TFA (P = 0.032). The TFA system produced significantly less cracks then the Reciproc and WaveOne systems apically (P = 0.004). Conclusions: Within the limits of this study, the TFA system caused less cracks then the full reciprocating system (Reciproc and WaveOne). Single-file reciprocating files produced significantly more incomplete dentinal cracks than full-sequence adaptive rotary motion.
Hardness and modulus of elasticity of primary and permanent teeth after wear against different dental materials
Authors: Galo Rodrigo , Contente Marta Maria Martins Giamatei , Galafassi Daniel , Borsatto Maria Cristina 
Published: April 2016

ABSTRACT
Objectives: The purpose of this study was to determine the Young's modulus and the hardness of deciduous and permanent teeth following wear challenges using different dental materials. Materials and Methods: Wear challenges were performed against four dental materials: A resin-based fissure sealant (Fluoroshield®), a glass ionomer based fissure sealant (Vitremer®), and two microhybrid composite resins (Filtek Z250 and P90®). Using the pin-on-plate design, a deciduous or a permanent tooth was made into a pin (4 mm × 4 mm × 2 mm) working at a 3 N vertical load, 1 Hz frequency, and 900 cycles (15 min) with Fusayama artificial saliva as a lubricant. Before and after the tribological tests, the hardness and elasticity modulus of the tooth samples were measured by creating a nanoindentation at load forces up to 50 mN and 150 mN. All of the results were statistically analyzed using ANOVA and post-hoc Duncan's tests (P < 0.05). Results: No difference in hardness was encountered between deciduous and permanent teeth (P < 0.05) or modulus of elasticity (P < 0.05) before or after the wear challenges for all of the dental materials tested. Conclusions: Wear challenges against the studied dental materials did not alter the properties of permanent or deciduous teeth after the application of a 3 N load.
Effectiveness of audiovisual distraction eyewear and computerized delivery of anesthesia during pulp therapy of primary molars in phobic child patients
Authors: Fakhruddin Kausar Sadia , Hisham El Batawi , Gorduysus Mehmet Omer 
Published: April 2016

ABSTRACT
Objectives: The aim of this study is to assess the effectiveness of audiovisual distraction technique with video eyewear and computerized delivery system-intrasulcular (CDS-IS) during the application of local anesthetic in phobic pediatric patients undergoing pulp therapy of primary molars. Materials and Methods: This randomized, crossover clinical study includes 60 children, aged between 4 and 7-year-old (31 boys and 29 girls). Children were randomly distributed equally into two groups as A and B. This study involved two treatment sessions of pulp therapy, 1-week apart. During treatment session I, group A had an audiovisual distraction with video eyewear, whereas group B had audiovisual distraction using projector display only without video eyewear. During treatment session II, group A had undergone pulp therapy without video eyewear distraction, whereas group B had the pulp treatment using video eyewear distraction. Each session involved the pulp therapy of equivalent teeth in the opposite sides of the mouth. At each visit scores on the Modified Child Dental Anxiety Scale (MCDAS) (f) were used to evaluate the level of anxiety before treatment. After the procedure, children were instructed to rate their pain during treatment on the Wong Bakers’ faces pain scale. Changes in pulse oximeter and heart rate were recorded in every 10 min. Results: From preoperative treatment session I (with video eyewear) to preoperative treatment session II (without video eyewear) for the MCDAS (f), a significant (P > 0.03) change in the mean anxiety score was observed for group A. Self-reported mean pain score decreases dramatically after treatment sessions’ with video eyewear for both groups. Conclusion: The use of audiovisual distraction with video eyewear and the use of CDS-IS system for anesthetic delivery was demonstrated to be effective in improving children's cooperation, than routine psychological interventions and is, therefore, highly recommended as an effective behavior management technique for long invasive procedures of pulp therapy in young children.
Los nuevos movimientos sociales, el uso de las TIC y su impacto social
Authors: Flores Morador Fernando , Cortés Vásquez Judith 
Published: April 2016

El siguiente trabajo es el resultado una revisión sobre los Nuevos movimientos sociales y el uso de las nuevas tecnologías, vistos a la luz de la filosofía política. Esta reflexión parte de los resultados obtenidos en la tesis doctoral sobre “Nuevos movimientos sociales y uso de las TIC. Estudio de casos” presentada en la Universidad Complutense de Madrid en el doctorado de Comunicación, Cambio Social y Desarrollo. Si bien estos movimientos han existido desde hace mucho tiempo, las nuevas tecnologías digitales permiten la visualización, expansión y divulgación mayor de sus agendas y propuestas. El “saber hacer” de estos nuevos movimientos y su capacidad de transformación social, son expresión de un marco de estrategias diferentes a las propuestas por los grupos tradicionales enmarcados en los partidos políticos. Las metodologías de acción civil requieren de un flujo natural de la información, que los partidos políticos no pueden reproducir. Los recursos simbólicos y las expresiones de sentimientos y emociones, saltan a la palestra del juego social configurando un nuevo lenguaje, una manera distinta de ser. Más allá de la implicaciones mediáticas y políticas, hay un trasfondo en términos de cambio social profundo.
Juvenile Nasopharyngeal Angiofibroma: Correlating Histology, Surgical Approach and Blood Loss
Authors: Aiyer RG , Gupta Rahul R , Jagtap Prarthna J , Thapar Tanuj 
Published: April 2016

ABSTRACTJuvenile nasopharyngeal angiofibroma (JNA) is locally destructive benign vascular tumor for which surgical excision has always been the treatment of choice, in spite of the availability of various other treatment modalities. Complete removal at the maiden attempt has always been the key to a successful outcome. Recurrences (or rather residuals) discourage both the surgeon and patient.This prospective study was carried out in the Department of Otorhinolaryngology, Sir Sayajirao General Hospital, Vadodara, Gujarat, between August 2002 and 2015. We have studied 28 patients with JNA for growth patterns, histological characteristics and to compare various surgical modalities. Besides other investigations a detailed histological examination of the tumor was performed which suggested that as the tumor ages, the stroma predominates and the vessels are compressed into slits. In actively growing tumor the vascular component predominates. The percentage of open vascular channels is directly proportional to the bleeding while the intervascular fibrosis is inversely related. Surgical excision of JNA is the preferred modality of treatment. Surgical approach is sometimes the most tricky decision. Choosing the right approach is akin to walking on the thin rope with adequate exposure on one side and postoperative scar on the other.How to cite this articleThapar T, Gupta RR, Jagtap PJ, Aiyer RG. Juvenile Nasopharyngeal Angiofibroma: Correlating Histology, Surgical Approach and Blood Loss. Clin Rhinol An Int J 2015;8(2):47-52.
Bilateral Inverted Papilloma: A Rare Rhinological Pathology
Authors: Subramaniam Thavakumar , Shamis Ayham , Barghouthi Taleb , Patil Naishadh 
Published: April 2016

ABSTRACTInverted papilloma is a benign tumor occurring in the head and neck. A large proportion of reported cases are unilateral, however, in rare instances bilateral disease is seen. This may lead to misdiagnosis.How to cite this articleSubramaniam T, Shamis A, Barghouthi T, Patil N. Bilateral Inverted Papilloma: A Rare Rhinological Pathology. Clin Rhinol An Int J 2015;8(2):58-59.
Comparison between Endoscopic Septoplasty and Conventional Septoplasty: Our Experience
Authors: Tukaram Kandakure Vinod 
Published: April 2016

ABSTRACT

Introduction
Nasal obstruction due to deviated nasal septum is a common problem encountered by otolaryngologists. A variety of surgical procedures have been tried in the treatment of the same.

Objective
This study was conducted to evaluate the outcomes and complications of endoscopic and conventional septoplasty.

Materials and methods
This is a prospective, randomized study done in Government Medical College, Latur in which 52 patients with symptomatic deviated nasal septum were included in the study. Eighteen of them underwent conventional septoplasty and the rest had endoscopic septoplasty.

Results
The difference in the functional outcome of both the surgeries was insignificant. Endoscopic septoplasty had better outcome with respect to complications and proved as an easier method to correct posterior deviations and isolated spurs.

Conclusion
Endoscopic septoplasty allows accurate, conservative repair of obstructive nasal septum deviations, with fewer complications and better functional results compared to conventional septoplasty.

How to cite this article
Tukaram KV, Lahane VJ, Mishra S, Prakash NP. Comparison between Endoscopic Septoplasty and Conventional Septoplasty: Our Experience. Clin Rhinol An Int J 2015;8(3):93-98.
Bilateral Total Aplasia of Paranasal Sinuses: A Rare Case Report
Authors: Joshi Ankita , Sundarray Chinmay , Sahoo Krishna Arpita 
Published: April 2016

ABSTRACTParanasal sinus anatomical anomalies with unknown etiology are common. Paranasal sinus-related diseases are associated with so high rate of morbidities, it becomes essential to identify the structure and pathophysiology of the paranasal sinuses. Computed tomography (CT) is a valuable tool in displaying its anatomy, any anatomic variations and diseases. As paranasal sinus development is a complex and long-lasting process, there are great structural variations between individuals. Maxillary and/or frontal sinus aplasia or hypoplasia are more common than the other types. Several degrees and combinations of aplasias and hypoplasias have been reported; however, there is only two case of total paranasal sinus aplasia in the literature. Here, we present the third case of total paranasal sinus aplasia, and the first ever case reported from India.How to cite this articleJoshi A, Sundarray C, Sahoo KA. Bilateral Total Aplasia of Paranasal Sinuses: A Rare Case Report. Clin Rhinol An Int J 2015;8(3):124-126.
Combination of Neutral Zone and Flange Techniques during Fabrication of Complete Dentures for a segmental Mandibulectomy patient with restricted Mouth Opening
Authors: Kulkarni Rahul S , Pawar Ravindra S 
Published: April 2016

ABSTRACT
Oral malignancies originating from or secondarily involving mandible are usually treated by surgical excision and may result in mandibular defect with or without loss of continuity. Surgical resection may lead to loss of buccal and lingual sulci, loss of symmetry of mandibular function, altered mandibular movements and deviation of the residual fragment toward the resected side. Radiation therapy is often given after resection of malignant tumors, which may produce undesirable side effects, like mucositis and mucosal atrophy, trismus, increased susceptibility to irritation and ulceration and reduction in salivary flow. This overall change in anatomy and physiology of oral cavity after segmental mandibular resection presents a restorative challange. This clinical report presents fabrication of complete dentures for a patient who had undergone segmental mandibulectomy and had restricted mouth opening.

How to cite this article
Kulkarni RS, Pawar RS. Combination of Neutral Zone and Flange Techniques during Fabrication of Complete Dentures for a Segmental Mandibulectomy Patient with Restricted Mouth Opening. Int J Prosthodont Restor Dent 2015;5(4):114-117.
The effect of different levels of diet total volatile nitrogen on performance, carcass characteristics and meat total volatile nitrogen in broiler chickens
Authors: Fallah Farhad , Ebrahimnezhad Yahya , Maheri-Sis Naser , Ghasemi-Sadabadi Mohammad 
Published: April 2016

Abstract. This study was conducted to determine the effect of different levels of diet total volatile nitrogen (TVN) on performance, carcass characteristics and meat TVN in broiler chickens. A total of 400 one-day-old Ross 308 broiler chicks was used in this study. On the first day, male and female chicks were separated by feather sexing. In the first week, all chicks were reared together and fed with a basal diet without urea. At the beginning of the second week, the male and female chicks were weighed so that the average body weight of chicks was approximately equal in each cage. Then the male and female chicks were allocated to 25 floor pens in a completely randomized design with five treatments, five replicates and 16 chicks in each replicate (eight males and eight females) throughout the experimental period, which lasted for 42 days. Dietary treatments consisted of zero (control), 0.5, 1, 1.5 and 2 % of urea in the diets. Before starting the experiment, the TVN levels in all diets were measured after adding different levels of urea, and TVN levels were 13.30, 14.95, 17.26, 23.26 and 27.47 mg 100 g−1 and 16.66, 15.02, 17.81, 24.66 and 26.25 mg 100 g−1 in starter and grower diets, respectively. Feed intake (FI), body weight gain (BWG) and the feed conversion ratio (FCR) were measured. Carcass characteristics as well as TVN in breast meat, thigh meat and the whole carcass and in left tibia and toe ash were measured. The results showed that FI levels were significantly different between the groups at different weeks except for the second week (P < 0.05). The BWG significantly differed among treatments (P < 0.05). In the second and sixth weeks, FCR was affected by increasing TVN in the diet (P < 0.05). Increasing TVN in broiler diets had a significant effect on the carcass characteristics (P < 0.05). Increasing TVN to more than 15 mg 100 g−1 linearly reduced left tibia and toe ash (P < 0.05). In addition, increasing TVN in the broiler diets affected the TVN of breast meat, thigh meat and the whole carcass of broilers (P < 0.05). These results suggest that increasing diet TVN to more than 15 mg 100 g−1 reduces performance traits, carcass characteristics, and left tibia and toe ash and increases the TVN amount of breast meat, thigh meat and the whole carcass.
Biogenic, anthropogenic and sea salt sulfate size-segregated aerosols in the Arctic summer
Authors: Ghahreman Roya , Norman Ann-Lise , Abbatt Jonathan P. D. , Levasseur Maurice , Thomas Jennie L. 
Published: April 2016

Abstract. Size-segregated aerosol sulfate concentrations were measured on board the Canadian Coast Guard Ship (CCGS) Amundsen in the Arctic during July 2014. The objective of this study was to utilize the isotopic composition of sulfate to address the contribution of anthropogenic and biogenic sources of aerosols to the growth of the different aerosol size fractions in the Arctic atmosphere. Non-sea-salt sulfate is divided into biogenic and anthropogenic sulfate using stable isotope apportionment techniques. A considerable amount of the average sulfate concentration in the fine aerosols with a diameter  <  0.49 µm was from biogenic sources (>  63 %), which is higher than in previous Arctic studies measuring above the ocean during fall (<  15 %) (Rempillo et al., 2011) and total aerosol sulfate at higher latitudes at Alert in summer (>  30 %) (Norman et al., 1999). The anthropogenic sulfate concentration was less than that of biogenic sulfate, with potential sources being long-range transport and, more locally, the Amundsen's emissions. Despite attempts to minimize the influence of ship stack emissions, evidence from larger-sized particles demonstrates a contribution from local pollution. A comparison of δ34S values for SO2 and fine aerosols was used to show that gas-to-particle conversion likely occurred during most sampling periods. δ34S values for SO2 and fine aerosols were similar, suggesting the same source for SO2 and aerosol sulfate, except for two samples with a relatively high anthropogenic fraction in particles  <  0.49 µm in diameter (15–17 and 17–19 July). The high biogenic fraction of sulfate fine aerosol and similar isotope ratio values of these particles and SO2 emphasize the role of marine organisms (e.g., phytoplankton, algae, bacteria) in the formation of fine particles above the Arctic Ocean during the productive summer months.
Effect of various climate databases on the results of dendroclimatic analysis
Authors: Sitko Roman , Vido Jaroslav , Škvarenina Jaroslav , Pichler Viliam , Scheer Ĺubomír , Škvareninová Jana , Nalevanková Paulína 
Published: April 2016

Abstract. The paper deals with the comparison of the time series drawn from different climate databases. We compared the observed data with the modeled data of monthly and seasonal temperature means and precipitation totals. Reliable and longest available time series of such data represent the basic starting point of dendroclimatic analyses. We evaluated the differences in the growth response of spruce derived using different databases of the considered climatic variables. The stem cores used to derive the cross-correlation function were taken from Hårås locality situated in the boreal zone of the Swedish part of Lapland. We compared the observed records from the nearest weather stations situated 18, 40, 70 and 110 km away from the locality with the interpolated data from four modeled temperature databases and four modeled precipitation databases generated by KNMI Climate Explorer. The spatial resolution of the modeled databases was 0.5°  ×  0.5° of latitude and longitude or 1°  ×  1° respectively. The evaluation revealed that in all modeled databases systematic errors of different magnitudes occurred. We also found that the radial increments of spruce correlated more tightly with the temperature than with the precipitation in the area of interest. Hence, in the conditions of the boreal zone, temperature could be a more important factor with regard to tree-ring formation. Because of higher spatial variability seen in precipitation data when compared to temperature data, we conclude that the nearest weather station is the most suitable for dendroclimatic analysis leaning on precipitation. Drawing on these results we recommend that the modeled precipitation and temperature databases examined in our study are used for dendroclimatic analyses within areas featuring a sparse network of weather stations.
An ice sheet model of reduced complexity for paleoclimate studies
Authors: Neff Basil , Born Andreas , Stocker Thomas F. 
Published: April 2016

Abstract. IceBern2D is a vertically integrated ice sheet model to investigate the ice distribution on long timescales under different climatic conditions. It is forced by simulated fields of surface temperature and precipitation of the Last Glacial Maximum and present-day climate from a comprehensive climate model. This constant forcing is adjusted to changes in ice elevation. Due to its reduced complexity and computational efficiency, the model is well suited for extensive sensitivity studies and ensemble simulations on extensive temporal and spatial scales. It shows good quantitative agreement with standardized benchmarks on an artificial domain (EISMINT). Present-day and Last Glacial Maximum ice distributions in the Northern Hemisphere are also simulated with good agreement. Glacial ice volume in Eurasia is underestimated due to the lack of ice shelves in our model. The efficiency of the model is utilized by running an ensemble of 400 simulations with perturbed model parameters and two different estimates of the climate at the Last Glacial Maximum. The sensitivity to the imposed climate boundary conditions and the positive degree-day factor β, i.e., the surface mass balance, outweighs the influence of parameters that disturb the flow of ice. This justifies the use of simplified dynamics as a means to achieve computational efficiency for simulations that cover several glacial cycles. Hysteresis simulations over 5 million years illustrate the stability of the simulated ice sheets to variations in surface air temperature.
Open-source feature-tracking algorithm for sea ice drift retrieval from Sentinel-1 SAR imagery
Authors: Muckenhuber Stefan , Korosov Anton Andreevich , Sandven Stein 
Published: April 2016

Abstract. A computationally efficient, open-source feature-tracking algorithm, called ORB, is adopted and tuned for sea ice drift retrieval from Sentinel-1 SAR (Synthetic Aperture Radar) images. The most suitable setting and parameter values have been found using four Sentinel-1 image pairs representative of sea ice conditions between Greenland and Severnaya Zemlya during winter and spring. The performance of the algorithm is compared to two other feature-tracking algorithms, namely SIFT (Scale-Invariant Feature Transform) and SURF (Speeded-Up Robust Features). Having been applied to 43 test image pairs acquired over Fram Strait and the north-east of Greenland, the tuned ORB (Oriented FAST and Rotated BRIEF) algorithm produces the highest number of vectors (177 513, SIFT: 43 260 and SURF: 25 113), while being computationally most efficient (66 s, SIFT: 182 s and SURF: 99 s per image pair using a 2.7 GHz processor with 8 GB memory). For validation purposes, 314 manually drawn vectors have been compared with the closest calculated vectors, and the resulting root mean square error of ice drift is 563 m. All test image pairs show a significantly better performance of the HV (horizontal transmit, vertical receive) channel due to higher informativeness. On average, around four times as many vectors have been found using HV polarization. All software requirements necessary for applying the presented feature-tracking algorithm are open source to ensure a free and easy implementation.