bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chorioangiom der Plazenta – eine seltene Ursache fetaler High-Output-Herzinsuffizienz
Authors: Ziemann Miriam , Apostolidou Sofia , Dum David , Hecher Kurt , Singer Dominique , Tavares de Sousa Manuela 
Published: September 2019

ZusammenfassungPlazentare Chorangiome sind als benigne Tumore des Choriongewebes seltene Ursache fetaler und maternaler Morbidität. Wir beschreiben den Fall eines großen plazentaren Chorangioms, das zu einem Polyhydramnion, konsekutiver Frühgeburt und kindlicher High-Output-Herzinsuffizienz führte. Aus einer Literaturrecherche leiten wir zudem Hinweise zur Diagnostik und Empfehlungen zur optimalen Schwangerschaftsbetreuung bei Verdacht auf Chorioangiom ab.
In Vivo Assessment of Zinc Deficiency on Craniofacial Growth in a Rat Model
Authors: Kara Cankat , Orbak Recep , Dagsuyu Ilhan Metin , Orbak Zerrin , Bilici Necmettin , Gumustekin Kenan 
Published: September 2019

ABSTRACTObjectives: The aim of this study was to investigate the effects of low levels of zinc intake on the rat mandible and maxilla during growth and to compare these results with those of zinc-containing
rats.Methods: The study was carried out on 14 Sprague-Dawley rats. The rats were randomly divided
into two groups. Group I rats were fed with a Zn-deficient diet, and Group II rats with a Zn-containing diet. At the end of the fourth week on the experimental diet, all the rats were killed and blood samples were taken. Serum Zn levels were measured by atomic absorption spectrophotometry. Then, the s ulls and mandibles were freed from soft tissues and measurements were made on the dry skulls, the mandibles, and teeth in both of the two groups.Results: The zinc-deficient group showed a significantly lower value in dry skull, mandible, and teeth measurements when compared with those of the Group II.Conclusions: Changes in zinc intake might exert an effect on the growth of craniofacial structures. A low-zinc diet during adolescence might slow bone and teeth growth and enhance the risk of oral, periodontal, and orthodontic problems in later years. (Eur J Dent 2009;3:10-15)
Adhesion to Primary and Permanent Dentin and a Simple Model Approach
Authors: Can-Karabulut Deniz C. , Oz Firdevs Tulga , Karabulut Baris , Batmaz Inci , Ilk Ozlem 
Published: September 2019

ABSTRACTObjectives: First to compare different dentin bonding agents’ shear bond strength to primary and permanent dentin. Secondly to compare the fracture failure modes and making an attempt to develop a statistical model that could be helpful in predicting them.Methods: Extracted human primary and permanent molars were used as substrates (dentin). The shear bond strength of composite to substrate was measured and fracture surfaces were evaluated visually and with stereomicroscope. Using the data obtained, a statistical model was built in order to predict the failure modes.Results: Higher bond strength values were obtained for permanent dentin. Total-etch adhesives displayed higher shear bond strength values than the self-etch adhesive. Adhesive failures were more frequently seen in primary dentin. Self-etch adhesive system displayed more adhesive failures. Prepared model confirmed the negative relationship between shear bond strength and the probability of observing adhesive failure.Conclusions: There should be an application protocol for the usage of dentin bonding agents in primary dentin. Further development of statistical and fuzzy models for failure modes can be supportive alternatives for microscopic evaluations and also be helpful in understanding and eliminating the factors which are responsible for the formation of adhesive failures and for achieving clinically more successful adhesive restorations. (Eur J Dent 2009;3:32-41)
Caries is Associated with Asthma and Epilepsy
Authors: Anjomshoaa Ida , Cooper Margaret E. , Vieira Alexandre R. 
Published: September 2019

ABSTRACTObjectives: There is evidence of association between systemic diseases and oral conditions, although it is not clear if these are direct or mediated by underlying factors such as health behaviors. The aim of this work was to evaluate whether self-reported systemic diseases were associated with caries experience.Methods: Medical history data and caries experience (DMFT and DMFS; Decayed, Missing due to caries, Filled Teeth/Surface) were obtained from the University of Pittsburgh School of Dental Medicine Dental Registry and DNA Repository. Information on 318 subjects (175 females and 143 males) was evaluated. Regression analysis was used to test for association between caries experience and disease status.Results: The stronger associations were found between caries experience and asthma and epilepsy. With respect to asthma, DMFT above 15 (R2 = 0.04) and DMFS above 50 (R2 = 0.02) were associated. After controlling for gender differences in asthma, the associations remained strong (R2 = 0.05 for both DMFT and DMFS). For epilepsy, DMFT above 15 (R2 = 0.18) and DMFS above 50 (R2 = 0.14) were associated.Conclusions: Asthma and epilepsy are associated with higher caries experience. (Eur J Dent 2009;3:297-303)
Electron Microprobe Analysis in Guided Tissue Regeneration: A Case Report
Authors: González-Jaranay Maximino , Sánchez-Quevedo María del Carmen , Moreu Gerardo , García José Manuel , Campos Antonio 
Published: September 2019

ABSTRACTObjectives: Several procedures have been advocated as regenerative procedures in periodontology, but one of the most widely used techniques up to now is guided tissue regeneration (GTR). Likewise, different assessment methods based on clinical, radiographic or histological measurements have been proposed for the evaluation of these regenerative procedures. However, none of the methods used for human material incorporates quantitative X-ray microanalysis to assess the degree of mineralization of the regenerated periodontal hard tissues. The objective of this report was to evaluate, using quantitative X-ray microprobe analysis, the newly-formed hard tissue in a periodontal infrabony defect.Methods: Electron microprobe analysis was used to study the nature of the newly-formed hard tissue 3 years after treatment with guided tissue regeneration in a patient with localized aggressive periodontitis.Results: Our quantitative analyses, using the peak-to-background method, showed calcium/phosphorus mass ratio of 1.50±0.38 in the newly-formed hard tissue around the affected tooth root.Conclusion: Quantitative X-ray microprobe analysis is a useful tool that may provide an accurate assessment of the degree of mineralization in an extremely small tissue sample. (Eur J Dent 2007;1:40- 44)
Use of FT-Raman Spectroscopy to Determine the Degree of Polymerization of Dental Composite Resin Cured with a New Light Source
Authors: Khalil Safaa K.H , Allam Mousa A , Tawfik Wael A 
Published: September 2019

ABSTRACTObjectives: To use the FT-Raman spectroscopy for evaluation the degree of polymerization of dental composite as a result of photo curing with a new light source in comparison to the conventional halogen light.Materials and Methods: In this study a new light source, based on a metal-halide lamp (TOPSPOT G12) was developed at NRC-Egypt for curing dental composites. Two groups of 108 composite samples each were cured using both the new light source and a conventional halogen source, as a control source. Different samples’ sizes (2x2, 3x3 and 6x3 mm2) were cured for different periods of time (2, 4, 8, 12, 20, and 40 seconds). The spectroscopic data were analyzed statistically by ANOVA and Duncan’s multiple range test (P< .05).Results: The results showed that the samples cured by the new metal-halide source produced higher polymerization rates than those cured by the halogen source. The polymerization rate was directly proportional to the exposure time and inversely proportional to the sample size, irrespective to the light source used. The results also showed that 12 seconds of metal-halide light curing produced polymerization rate comparable to or even higher than that produced by 40 seconds halogen light curing.Conclusions: The new light source produced a satisfactory degree of polymerization in a remarkable shorter curing time and it can be recommended for clinical use. (Eur J Dent 2007;2:72-79)
Microtensile Bond Strength of Cad-Cam and Pressed-Ceramic Inlays to Dentin
Authors: Öztürk A Nilgün , İnan Özgür , İnan Erkan , Öztürk Bora 
Published: September 2019

ABSTRACTObjectives: CAD-CAM system is popular because of high esthetic and short fabrication time. But, there is limited information available about the microtensile bonding of luting cements to CAD-CAM inlays and to dentin. The aim of this study was to examine the bond strength of CAD-CAM (Cerec 3) and pressed-ceramic (IPS Empress 2) inlays to dentin surface by microtensile testing using two luting cements.Materials and Methods: Standardized mesio-occlusal cavities were made in forty extracted molar teeth. An occlusal reduction of 2 mm was made; the bucco-lingual width of the proximal boxes was 4 mm, the occlusal width 3 mm and the depth of the pulpal and axial walls 2 mm. The proximal boxes were extended 1 mm below the cemento-enamel junction. Teeth were randomly assigned to 2 groups to evaluate the bonding of 2 ceramic systems, Cerec 3 (Group I) and IPS Empress 2 (Group II), to dentin. Each of the 2 groups were further divided into 2 luting cement groups, Panavia F (Group A) and Variolink II (Group B). After cementation, the teeth were sectioned into two 1.2x1.2 mm wide ‘I’ shape sections. The specimens were then subjected to microtensile testing at a crosshead speed of 1 mm/min. Twoway ANOVA and Tukey HSD tests were used to evaluate the results.Results: The mean microtensile bond strengths of Cerec 3 and IPS Empress 2 bonding to dentin with luting agents in MPa were Panavia F (13.98±3.44), Variolink II (14.19±3.12) and Panavia F (15.12±3.15), Variolink II (15.45±3.08) respectively. No significant differences were found among the 2 ceramic systems (P>.05) and 2 luting cements with regard to dentin bond strengths (P>.05).Conlusions: There was no difference found between the dentin bond strength of the Cerec 3 and IPS Empress 2 inlays cemented with two luting cements. (Eur J Dent 2007;2:91-96)
Gingival Hyperplasia as an Early Diagnostic Oral Manifestation in Acute Monocytic Leukemia: A Case Report
Authors: Demirer Serhat , Özdemir Hakan , Şencanc Mehmet , Marakoğlud Ismail 
Published: September 2019

ABSTRACTAcute Myeloblastic Leukemia (AML) is a malignant disease of bone marrow. Due to its high morbidity rate, early diagnosis and appropriate medical therapy is essential. Rapidly forming gingival hyperplasia is usually the first sign of this disease. This case report describes a 17-year-old female who presented rapid gingival overgrowth together with gingival bleeding in only two weeks time. A medical consultation was asked from hematology clinics and after a detailed medical examination Acute Monocytic Leukemia (FAB M5) was rendered. Chemotherapy was the choice of treatment. The patient responded well to chemotherapeutic induction regimen and after two months of medical therapy disease remised and gingival hyperplasia regressed. This case report shows that the gingival hyperplasia may represent an initial manifestation of an underlying systemic disease. Also, early medical therapy in acute monocytic leukemia may resolve the gingival hyperplasia that companies the disease progression. (Eur J Dent 2007;2:111-114)
Validity of a Manual Soft Tissue Profile Prediction Method Following Mandibular Setback Osteotomy
Authors: Kolokitha Olga - Elpis 
Published: September 2019

ABSTRACTObjectives: The aim of this study was to determine the validity of a manual cephalometric method used for predicting the post-operative soft tissue profiles of patients who underwent mandibular setback surgery and compare it to a computerized cephalometric prediction method (Dentofacial Planner). Lateral cephalograms of 18 adults with mandibular prognathism taken at the end of presurgical orthodontics and approximately one year after surgery were used.Methods: To test the validity of the manual method the prediction tracings were compared to the actual post-operative tracings. The Dentofacial Planner software was used to develop the computerized post-surgical prediction tracings. Both manual and computerized prediction printouts were analyzed by using the cephalometric system PORDIOS. Statistical analysis was performed by means of t-test.Results: Comparison between manual prediction tracings and the actual post-operative profile showed that the manual method results in more convex soft tissue profiles; the upper lip was found in a more prominent position, upper lip thickness was increased and, the mandible and lower lip were found in a less posterior position than that of the actual profiles. Comparison between computerized and manual prediction methods showed that in the manual method upper lip thickness was increased, the upper lip was found in a more anterior position and the lower anterior facial height was increased as compared to the computerized prediction method.Conclusions: Cephalometric simulation of post-operative soft tissue profile following orthodonticsurgical management of mandibular prognathism imposes certain limitations related to the methods implied. However, both manual and computerized prediction methods remain a useful tool for patient communication. (Eur J Dent 2007;1:202-211)
Knowledge of and Attitudes towards Preventive Dental Care among Iranian Dentists
Authors: Ghasemi Hadi , Murtomaa Heikki , Torabzadeh Hassan , Vehkalahti Miira M 
Published: September 2019

ABSTRACTObjectives: To assess Iranian dentists’ knowledge of and attitudes towards preventive dental careMethods: A questionnaire survey was conducted at two nationwide annual dental congresses in 2004 and 2005 in Tehran, Iran. Dentists’ level of knowledge was assessed based on their responses on a Likert scale (0-4) to nine statements on preventive dental care. Higher scores indicated more accurate knowledge. Dentists’ attitudes towards preventive dental care were rated based on responses on a Likert scale (1-7) to nine pairs of bipolar adjectives. The respondents were to choose the response which best described their opinion. Higher scores indicated more positive attitudes. Of 1033 responding dentists, 980 (64% men) were deemed eligible for this study. Statistical evaluation was by t-test and the Chi-square testResults: Highest ratings were obtained for knowledge of the role of sugar consumption (Mean±SD: 3.73±0.60), sealants (3.58±0.68), and water fluoridation (3.35±0.81) in caries prevention; the lowest for their knowledge of the superiority of the use of fluoride toothpaste over technique of brushing (1.11±1.09). Dentists’ attitudes towards preventive dental care appeared most positive regarding its usefulness (Useful — Useless; 6.67±0.94), value (Valuable — Worthless; 6.59±0.98) to the community and for its status as a scientific (Scientific — Unscientific; 6.47±1.06) subject. Overall, female dentists had more favourable attitudes towards preventive dental care than male colleaguesConclusions: Preventive dentistry should be emphasised in dental education in order to update dentists’ knowledge and attitudes regarding preventive dental care. (Eur J Dent 2007;1:222-229)
Chemical Colitis due to Peracetic Acid: a Case Report and Review of Literature
Authors: Zullo Angelo , Hassan Cesare , Guarini Alessandra , Lorenzetti Roberto , Campo Salvatore , Morini Sergio 
Published: September 2019

AbstractReprocessing of both endoscopic instruments and reusable disposals is mandatory to prevent infection transmission. However, toxic colitis due to endoscope contamination by different disinfectants following an imperfect washing has been reported. We present a case of peracetic acid-induced colitis and reviewed the literature. Overall, five cases of peracetic acid toxic colitis have been reported. All cases presented with “snow white sign” immediately appearing during endoscopy, two patients complaint of mild abdominal pain (one of whom had also fever and rectal bleeding), whilst the othesr remained totally asymptomatic. Only one patient received a 1-week metronidazole treatment. No immediate complications were observed, and no sequels occurred at clinical-endoscopic follow-up. The identified cause of disinfectant contamination was a defective either manual or automated rinsing of the colonoscope following the reprocessing procedure.( J Dig Endosc2011;2(1):15-17)
A.E.Favorskii’s scientific legacy in modern organic chemistry: prototropic acetylene – allene isomerization and the acetylene zipper reaction
Authors: Danilkina Natalia A. , Vasileva Anna A. , Balova Irina A. 
Published: September 2019

Alexei Evgrafovich Favorskii was an outstanding organic chemist who left a great scientific legacy as a result of long time and fruitful work. Most of the theoretically and practically important discoveries of A.E.Favorskii were made in the chemistry of acetylene and its derivatives. Nowadays, the reactions discovered by him, which include acetylene – allene isomerization, the Favorskii and retro-Favorskii reactions, the Favorskii rearrangement and the vinylation reaction, are widely used in industry and in laboratory synthesis. This review summarizes the main scientific achievements of A.E.Favorskii, as well as their development in modern organic chemistry. Much consideration is given to acetylene – allene isomerization as a convenient method for the synthesis of methyl-substituted acetylenes and to the acetylene zipper reaction as a synthetic tool for obtaining terminal acetylenes. The review presents examples of the application of these reactions in modern organic synthesis of complex molecules, including natural compounds and their analogues.The bibliography includes 266 references.
Arbuscular mycorrhizal fungi in the rhizosphere soil of poisonous plants depressed the growth of pasture grasses in the Tibetan Plateau Alpine meadow
Authors: Wang Xiaojuan , Wang Qiang , Jin Liang , Sun Li , Wang Qian , Zhang Liang , Chen Yinglong 
Published: September 2019

ABSTRACT

In order to explore the influence of arbuscular mycorrhizal (AM) fungi in the rhizosphere of poisonous plants on the neighboring pasture grasses in the Tibetan Plateau Alpine meadow ecosystem, rhizosphere soils were collected from eight different poisonous plants in degraded grasslands and one from pasture grass in non-degraded grasslands (CK). The collected soils were used as inocula to assess the influence of indigenous AM fungi on the growth of two typical pasture grass species,
Elymus nutans
and
Poa pratensis
, in a bioassay experiment. Five growth parameters and two AM parameters were determined. The mycorrhizal responsiveness and the importance value were calculated. Significant differences between the eight poisonous plants and CK were observed. Compared to CK, rhizosphere soil from the eight poisonous plants had lower AM fungal spore densities. The growth of
E. nutans
and
P. pratensis
seedlings was depressed with the inoculation from poisonous plants rhizosphere soil. This study demonstrated that the presence of poisonous plants with grassland degradation altered inherent AM fungal community abundance, and could exert inhibition effects on the growth of pasture grasses. It may attribute to discover the important role of rhizosphere soil of different poisonous plants to AM fungal community on the Alpine meadow.
Density and function of actin-microdomains in healthy and NF1 deficient osteoclasts revealed by the combined use of atomic force and stimulated emission depletion microscopy
Authors: Deguchi Takahiro , Fazeli Elnaz , Koho Sami , Pennanen Paula , Alanne Maria , Modi Mayank , Eriksson John E , Vienola Kari V , Hänninen Pekka E , Peltonen Juha , Näreoja Tuomas 
Published: September 2019

AbstractActin and myosins (IIA, IIB, and X) generate mechanical forces in osteoclasts that drive functions such as migration and membrane trafficking. In neurofibromatosis, these processes are perturbed due to a mutation in neurofibromatosis type 1 (NF1) gene. This mutation leads to generation of hyperactive bone-resorbing osteoclasts that increases incidence of skeletal dysplasia e.g. early-onset osteoporosis in patients suffering from neurofibromatosis. To study the density and function of actin clusters in mutated cells we introduce a new approach for combined use of a stimulated emission depletion (STED) microscope with an atomic force microscope (AFM). We resolved actin-cores within actin-microdomains at four typical structures (podosome-belt, podosome raft, actin patches, and sealing zone) for osteoclasts cultured on bone as well as on glass. Densities of actin-cores in these structures were higher on bone than on glass, and the nearest neighbor distances were shortest in sealing zones, where also an accumulation of vesicular material was observed at their center. In NF1 deficient osteoclasts, the clustering was tighter and there was also more vesicular material accumulated inside the sealing zone. Using the STED-AFM system, we measured the condensation of the actin structures in real-time after a bone-coated cantilever was placed in contact with a differentiated osteoclast and found that the condensation of actin was initiated at 40 min, after sufficient local actin concentration was reached. A functional implication of the less dense clustering in NF1 deficient cells was that the adhesion of these cells was less specific for bone. The data and new methodologies presented here build a foundation for establishing novel actomyosin dependent mechanisms during osteoclast migration and resorption.
Energy equalities for compressible Navier–Stokes equations
Authors: Nguyen Quoc-Hung , Nguyen Phuoc-Tai , Tang Bao Quoc 
Published: September 2019

Abstract
The energy equalities of compressible Navier–Stokes equations with general pressure law and degenerate viscosities are studied. By using a unified approach, we give sufficient conditions on the regularity of weak solutions for these equalities to hold. The method of proof is suitable for the case of periodic as well as homogeneous Dirichlet boundary conditions. In particular, by a careful analysis using the homogeneous Dirichlet boundary condition, no boundary layer assumptions are required when dealing with bounded domains with a boundary.
Probing phase transitions in a soft matter system using a single spin quantum sensor
Authors: Kavatamane Vinaya Kumar , Duan Dewen , Arumugam Sri Ranjini , Raatz Nicole , Pezzagna Sebastian , Meijer Jan , Balasubramanian Gopalakrishnan 
Published: September 2019

Abstract
Phase transitions in soft matter systems reveal some of the interesting structural phenomena at the levels of individual entities constituting those systems. The relevant energy scales in soft matter systems are comparable to thermal energy (k
B
T ∼ 10−21 J). This permits one to observe interesting structural dynamics even at ambient conditions. However, at the nanoscale most experimental probes currently being used to study these systems have been either plagued by low sensitivity or are invasive at molecular scales. Nitrogen-vacancy (NV) centers in diamond is emerging as a robust quantum probe for precision metrology of physical quantities (e.g. magnetic field, electric field, temperature, and stress). Here, we demonstrate by using NV sensors to probe spin-fluctuations and temperature simultaneously to obtain information about controlled phase changes in a soft matter material as a function of temperature. The soft matter system chosen for the study is a standard liquid crystalline (LC) material which shows distinct phases close to room temperature. Individual NV centers at depths of a few nm are used as a probe to detect magnetic signals emanating from a few molecular layers of sample on the surface of the diamond. The organization and collective dynamics of LC molecules in nanoscopic volumes are discussed. Our study aims to extend the areas of application of quantum sensing using NV centers to probe the soft matter systems, particularly those exhibiting mesophases and interesting interfacial properties.