scholarly journals Type 3 Dens Invagination. Diagnosis and comprehensive treatment

2021 ◽  
Vol 105 (1) ◽  
pp. 30-35
Author(s):  
V. Degasyuk ◽  
Keyword(s):  
Comprehensive Treatment ◽  
Sodium Hypochlorite Solution ◽  
Hand Tools ◽  
Needle Holder ◽  
X Ray ◽  
Barrier Membrane ◽  
Edta Solution ◽  
Standard Structure ◽  
Type 3 ◽  
Dens Invaginatus

Object: researching the combination of endodontic and surgical treatment of a tooth with developing dens invaginatus pathology. Materials and methods. X-ray diagnostics were performed with the Veraview X800 Morita. Irrigation with sodium hypochlorite solution 5.25 % with additional ultrasound treatmentabd 17 % EDTA solution were used for drug treatment of invagination and the main channel. The root canal and invagination, due to a non-standard structure, were handled by VDW hand tools combined with the Aurum BLUE (Meta Biomed) machine tool. Constant obturation was performed by the method of vertical compaction «Siller-AN plus». During the surgical stage, Langer (Hu-Friedy) periodontal curettes, CL 8 (Hu-Friedy) curettage spoon, 141-004-31W Oval Spoon Excavator (Hu-Friedy) were used; access to the focus was formed using a piezo surgical spherical nozzle (CE 1, Piezotome Solo (Satelec, Akteon). 4583 Kohler needle holder was used for suturing, suture material – polypropylene 5.0. The bone defect was filled with xenogenic material BIO GEN cancellous size 2/3 mm, 2.0 (Biotek), the barrier membrane – BIOCOLLAGEN (Biotek), the periodontal defect was filled with BIO GEN mix (Biotek). Key words: dens invaginatus, tooth in tooth, endodontic treatment, bone augmentation, apical surgery.

scholarly journals There is a Correlation between Fragility Fractures of the Pelvis and a Circle-Type Morphology of the True Pelvis, but Not with Pelvic Incidence

2021 ◽  
pp. 1-6
Author(s):  
Matthias Spalteholz ◽  
Matthias Spalteholz ◽  
Gulow Jens ◽  
Pap Geza
Keyword(s):  
Pelvic Incidence ◽  
Fragility Fractures ◽  
Statistical Correlation ◽  
X Ray ◽  
Lack Of Information ◽  
The Mean ◽  
Fracture Types ◽  
Type 3

Purpose: Osteoporosis is a major risk factor for the development of fragility fractures of the pelvis (FFP). There is a lack of information about the influence of anatomical conditions such as Pelvic Incidence and Pelvic Ratio (DT/DS ratio) on this kind of fractures. Methods: This is a monocentric retrospective analysis. X-ray images of the lumbar spine and pelvis and 3D-MPR CT reconstructions of the pelvis were analysed to determine Pelvic Incidence (PI) and Pelvic Ratio (PR) in 141 fragility fractures of the pelvis. Statistical analyses were performed to examine the correlation between these spinopelvic parameters and fragility fractures of the pelvis. Results: A total of 141 fragility fractures of the pelvis (14 men = 9.93%, 127 women = 90.07%) were analysed. According to the FFP-classification we recognized FFP type 1 fractures in 19.15%, FFP type 2 in 41.13%, FFP type 3 in 8.51% and FFP type 4 fractures in 32.21%. The mean PI was 58.83º. There was no statistical correlation between PI and fracture types (p=0.81). The mean PR was 1.099. 57 patients (40.43%) demonstrated a DT/DS ratio ≤ 1.06, corresponding to a circle-type morphology. 24 patients (17.02%) demonstrated a DT/DS ratio ≥ 1.18, corresponding to an ellipse-type pelvis. A circle-type pelvis is significantly more often associated with fragility fractures of the pelvis than an ellipse-type morphology (p<0.001). Conclusion: The results of our work demonstrate a strong statistical correlation between the circle-type morphology of the pelvis (PR ≤ 1.06) and fragility fractures of the pelvis. There is no statistical correlation between fragility fractures of the pelvis and Pelvic Incidence.

Alkin-Komplexe des Rheniums in hohen Oxidationsstufen / Alkyne Complexes of Rhenium in High Oxidation States

1990 ◽  
Vol 45 (6) ◽  
pp. 876-886 ◽  
Author(s):  
Wolfgang A. Herrmann ◽  
Josef K. Felixberger ◽  
Josef G. Kuchler ◽  
Eberhardt Herdtweck
Keyword(s):  
Diffraction Study ◽  
Scale Up ◽  
Oxidation States ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reducing Conditions ◽  
Molar Amount ◽  
High Oxidation ◽  
Alkyne Complexes ◽  
Type 3

The class of π-alkyne complexes of metals in medium and high oxidation states has been extended by the type CH3ReO2(RC≡CR′) (3a—i). Exchange of alkyne for oxo ligands under reducing conditions has been employed as a new general synthesis. Compounds 3 are thus obtained by reaction of methyltrioxorhenium(VII) (1) with the alkynes 2a—i in the presence of a ca. 1.1-fold molar amount of polymer-bound triphenylphosphane as reducing agent (desoxygenation). The structural characterization was carried out for the example of the tolan complex 3 e by virtue of a single-crystal X-ray diffraction study at —80 °C, according to which the description of compounds 3 as “rhenacyclopropenes” seems justified. Evidence from NMR investigations of 3 a and 3 c shows that no fast rotation of the respective alkyne ligand around the axis to the metal atom occurs on the NMR time scale up to at least 105 °C. A minimal rotation barrier of approximately 20 kcal/mol is thus to be estimated. Reaction of type 3 compounds (R = R′ = CH3, b; R = R′ = C2H5, c) with polymer-bound triphenylphosphane under more drastic conditions (boiling toluene) for two days effects further reduction, with the dinuclear, diamagnetic rhenium(IV) complexes 4b and 4c, resp., being formed. Sterically demanding alkynes (e.g., R = R′ = Si(CH3)3, C6H5) seem to prevent this type of reaction. According to an X-ray diffraction study, 4b has an equilateral Re2O-triangular core geometry, with the ligands O, CH3, and butyne(2) arranged in such a way that C2-symmetry results. The alkyne complexes reported here are the first ones of tetra- and pentavalent rhenium.

Reactive nanoparticles in chalk: implications for sequestration of metals from groundwater

2008 ◽  
Vol 72 (1) ◽  
pp. 373-376
Author(s):  
Z. Balogh ◽  
S. L. S. Stipp ◽  
K. Bechgaard ◽  
E. Johnson
Keyword(s):  
Electron Microscopy ◽  
Metal Uptake ◽  
Northern Europe ◽  
Uptake Capacity ◽  
X Ray ◽  
Industrial Sites ◽  
Surface Areas ◽  
Natural Nanoparticles ◽  
Transmission Electron ◽  
Edta Solution

AbstractWater supplies from chalk aquifers in northern Europe can be contaminated by semi-metals such as As and metals such as Cr, Ni and many more, as a result of leaks from landfills, industrial sites and from natural oxidation of pyrite in the chalk, releasing trace elements. Chalk, which is predominantly calcite (CaCO3), has the ability to immobilize Ni, but its uptake by chalk is sometimes greater than expected. In an attempt to identify the controls on metal uptake, chalk samples from Klintholm I/S (Fyn, Denmark) were decalcified in EDTA solution and the residue was examined with transmission electron microscopy (TEM) for morphology and composition. Energy dispersive X-ray spectrometry (EDXS) revealed minor Si and Al (probably clay) and major Mn and Fe as (hydr)oxides. These natural nanoparticles have very large surface areas contributing to chalk’s uptake capacity for Ni and other metals from groundwater.

Clinical Joint Outcome after Joint Bleeds in Patients with Von Willebrand Disease Is Comparable to Moderate and Severe Hemophilia A Despite Fewer Joint Bleeds

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 3789-3789 ◽  
Author(s):  
Karin PM van Galen ◽  
Merel Timmer ◽  
Piet de Kleijn ◽  
Frank W.G. Leebeek ◽  
Roger E.G. Schutgens ◽  
...  
Keyword(s):  
Physical Examination ◽  
Research Funding ◽  
Functional Limitations ◽  
Joint Damage ◽  
Von Willebrand Disease ◽  
X Rays ◽  
X Ray ◽  
History Of ◽  
Type 3 ◽  
Von Willebrand

Abstract Background Recurrent joint bleeds are the main cause of joint deterioration (hemophilic arthropathy) in patients with hemophilia. To what extent arthropathy occurs following joint bleeds in patients with Von Willebrand disease (VWD) compared to hemophilia has never been studied. Objectives The primary objective was to compare joint outcome by physical examination between adults with VWD and moderate and severe hemophilia A (HA). The main secondary objectives were to compare joint bleed frequency, radiological joint damage and self-reported functional limitations between VWD and moderate and severe HA. Methods We selected adult patients with VWD (VWF activity <30%) and moderate or severe HA, who had a medical history of treatment for joint bleeds, for this post hoc analysis. To compare joint outcome we used the Hemophilia Joint Health Score (HJHS range 0-124, obtained by physical examination), X-ray Pettersson scores of ankles, knees and elbows (PS range 0-13 per joint) and Hemophilia Activities List scores, a patient administered questionnaire measuring functional limitations (HAL range 0-100). Univariate analyses were performed using Mann Whitney U and Chi2. For multivariate analysis we used negative binomial regression analysis (HJHS) and logistic regression (dichotomized PS>3 and HAL<95) adjusted for age. We performed a subgroup analysis of the patients with type 3 VWD. Results We included 48 patients with VWD, 39 with moderate and 59 with severe HA. The mean age was 45, 38 and 26 years, respectively. Fewer patients with VWD than HA had a lifetime history of more than 5 joint bleeds (56% VWD vs. 77% moderate HA vs. 98% severe HA, p<0.001). Joint dysfunction at physical examination was comparable between the patients with VWD and moderate HA (median HJHS 5 vs. 5.5, p=0.65) but slightly better in VWD compared to severe HA (median HJHS 5 vs. 9, p=0.02). Apparent joint damage on X rays (PS>3 of one or more joints) occurred in 12/46 patients with VWD compared to 27/40 patients with severe HA (26% vs. 68%: OR 0.09; 95%CI 0.03-0.34, p<0.001). In moderate HA insufficient X rays were available for analyses. Functional limitations according to the HAL were comparable between patients with VWD and moderate and severe HA (VWD median HAL total score 88 vs. 95 in both moderate and severe HA, p=0.35). The subgroup analysis of joint dysfunction in patients with type 3 VWD (n=19, median age 40) showed clinical changes comparable to severe HA (median HJHS 14 vs. 9, p=0.83). We found a trend towards less radiological joint damage in type 3 VWD compared to severe HA (PS>3: 47% vs. 68%, OR 0.28; 95%CI 0.07-1.12, p=0.07). However, patients with type 3 VWD reported more functional limitations compared to those with moderate or severe HA (median HAL total score 77 vs. 95, p=0.01; adjusted for age OR 0.38; 95%CI 0.1-1.2, p=0.10). Conclusions Despite fewer joint bleeds, joint function according to the HJHS was comparable between adult patients with VWD and moderate HA with a history of treatment for joint bleeds. Apparent X ray joint damage occurred less often in patients with VWD compared to those with severe HA. The HJHS of patients with type 3 VWD was comparable to those with severe HA, but the patients with type 3 VWD reported more functional limitations, partly explained by their higher age. Knowledge of similarities and differences in joint outcome between VWD and hemophilia can be helpful to improve the awareness and treatment of joint bleeds in VWD to prevent arthropathy and functional limitations. Disclosures van Galen: Bayer: Research Funding; CSL Behring: Research Funding; Baxter: Research Funding. Leebeek:CSL Behring: Research Funding; Baxter: Research Funding. Schutgens:Sanquin: Research Funding; CSL Behring: Research Funding. Fischer:Baxalta/Baxter: Consultancy, Research Funding, Speakers Bureau; Pfizer: Consultancy, Research Funding, Speakers Bureau; CSL Behring: Consultancy, Speakers Bureau; NovoNordisk: Consultancy, Research Funding, Speakers Bureau; Octapharma: Speakers Bureau; Baxter: Consultancy, Research Funding, Speakers Bureau; Wyeth: Research Funding; Biogen: Consultancy; Biotest: Consultancy, Speakers Bureau; Bayer: Consultancy, Research Funding, Speakers Bureau; Freeline: Consultancy. Mauser-Bunschoten:CSL Behring: Research Funding; Bayer: Research Funding; Baxter: Research Funding; Griffols: Research Funding; Novo Nordisk: Research Funding; Pfizer: Research Funding; Biovitrum: Research Funding; Saquin: Research Funding.

Studies on EDTA Recycling via Formation of EDTA Iron(III) Sodium Salt

2011 ◽  
Vol 396-398 ◽  
pp. 1707-1710
Author(s):  
Li Wang ◽  
Di Weng ◽  
Jun Bo Wang ◽  
Xue Song Chen ◽  
Xiao Lu Xu
Keyword(s):  
Sodium Salt ◽  
Inductively Coupled Plasma ◽  
Transformation Product ◽  
Commercial Application ◽  
Separation And Purification ◽  
Paper Recycling ◽  
X Ray ◽  
Inductively Coupled ◽  
Edta Solution ◽  
Infrared Spectrophotometer

So far the absorption of NO by FeIIEDTA solution has not been put into commercial application due to its high cost. In this paper recycling EDTA via formation of EDTA iron (III) sodium salt was presented for the purpose of offering a new pathway to solve this issue. The invalid solution was fully oxidized after NO absorption by FeIIEDTA solution. Ion chromatogram were used to detect the remained ions in solution. It was found that the original ions such as SO32-, NO2- and so on were all oxidized to SO42- and NO3-. Solubility measurement was carried out and it was revealed that the separation and purification could be performed by decreasing the temperature to 306 K. Fourier transformation infrared spectrophotometer (FTIR) and X-ray diffractometer (XRD) were applied to determine the transformation product of EDTA. The results indicated that FeNaEDTA was formed. Inductively coupled plasma and atomic absorption spectroscopy (ICP-AAS) demonstrated that the practical solubility of FeNaEDTA reached 78.7% at pH 7.

X-Ray Charge Densities and Chemical Bonding

1997 ◽  
Author(s):  
Philip Coppens
Keyword(s):  
Chemical Bonding ◽  
Electron Density Distribution ◽  
Comprehensive Treatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Charge Densities ◽  
Fundamental Information ◽  
Thermodynamic Measurements ◽  
Lattice Energies ◽  
Theoretical Results

This book deals with the electron density distribution in molecules and solids as obtained experimentally by X-ray diffraction. It is a comprehensive treatment of the methods involved, and the interpretation of the experimental results in terms of chemical bonding and intermolecular interactions. Inorganic and organic solids, as well as metals, are covered in the chapters dealing with specific systems. As a whole, this monograph is especially appealing because of its broad interface with numerous disciplines. Accurate X-ray diffraction intensities contain fundamental information on the charge distribution in crystals, which can be compared directly with theoretical results, and used to derive other physical properties, such as electrostatic moments, the electrostatic potential and lattice energies, which are accessible by spectroscopic and thermodynamic measurements. Consequently, the work will be of great interest to a broad range of crystallographers and physical scientists.

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