RESTORATION OF TEETH BASED ON THE CONCEPT OF «PRE-POLISHING OF THE COMPOSITE DENTIN LAYER”

2021 ◽  
pp. 43-50
Author(s):  
Kovalevsky A.M. ◽  
Vorobieva Yu.B. ◽  
Malysheva D.D.
Keyword(s):  
Composite Material ◽  
Classical Method ◽  
Surface Characteristics ◽  
Adhesive System ◽  
Dental Restoration ◽  
Layer By Layer ◽  
The Aesthetic ◽  
Long Term Preservation

After studying various methods of restoring teeth in the oral cavity, we came to the conclusion that no one technique is perfect. This article describes clinical cases, as well as laboratory studies that allow us to judge the effectiveness of dental restoration based on the concept of "pre-polishing of the dentin layer of the composite". The quality of the surface characteristics of the restorations of the anterior group of teeth made of pre-polymerization composite materials was analyzed. The aesthetic restoration of teeth was performed using the classical method of layer-by-layer application and photopolymerization of the composite, as well as the proposed method based on the concept of pre-polishing of the dentin layer of the composite material. After adequate anesthesia and odontopreparation, a portion of the composite material that recreates the dentine layer is introduced into a pre-prepared and isolated from the oral fluid cavity, adapted to the hard tissues of the tooth, and then photopolymerized with a dental lamp. Next, the created layer is polished to a mirror shine and re-adhesive treatment with a self-etching adhesive system, photopolymerization. The next transparent layer of the composite material, imitating enamel, is applied to the "petal" of the polished dentine (inner) layer of the material to the enamel-dentine border with the obligatory imitation of mamelon and the surface structure of the restored tooth and its cutting edge is formed in a generally accepted way. After the final photopolymerization, the final grinding and polishing is carried out. The proposed method of aesthetic restoration of teeth, based on the concept of pre-polishing the dentine layer of the composite material, allows you to achieve a higher quality of restoration, and guarantees long-term preservation of color, gloss and edge fit of the restoration of the frontal group of teeth.

scholarly journals MANUFACTURING TECHNIQUE OF METAL CERAMIC RESTORATION WITH IMPLANT-ABUTMENT AT GINGIVAL RESORPTION CASE

2019 ◽  
Vol 3 (1) ◽  
pp. 22
Author(s):  
Galih Paramarta ◽  
Eny Inayati
Keyword(s):  
Three Dimensional ◽  
Dental Restoration ◽  
Coating Application ◽  
Manufacturing Technique ◽  
Implant Abutment ◽  
Metal Ceramic ◽  
Manufacturing Techniques ◽  
The Aesthetic ◽  
Ceramic Restorations

Background: The low levels of patient satisfaction and confidence in the restoration of the gingival resorption results in impaired quality of life in both functional and psychosocial aspects. It is necessary to manufacture a dental restoration to restore the mastication, phonetic, and aesthetic functions associated with soft tissue repair. Manufacture of gingiva ceramic restorations which are believed to be an alternative to restore the aesthetic function and harmonization of the patient’s teeth. In terms of manufacturing techniques, this restoration has a level of difficulty in achieving a balance between “White aesthetic” and “aesthetic pink”. Objective: This study aims to provide knowledge to the reader of Manufacturing Technique of Metal Ceramic Restoration with Implant-Abutment at Gingival Resorption Case. Reviews: Gingiva ceramic restorations can be used to create esthetic implant-supported restorations when bone and gingival tissues are deficient and surgical replacement of such tissues is not possible. Dental technicians should be able to analyze the three-dimensional shapes of gingival anatomy, color, texture, smile components, the balance of the “pink aesthetic” and “white aesthetic”. Conclusion: Manufacturing Technique of Metal Ceramic Restoration with Implant-Abutment at Gingival Resorption Case including the manufacture of metal coping, oxidation, application of opaque coating, application of the first “white aesthetic” ceramics (Opaque Dentine, Dentine, Enamel and transpa on crown coping restorations), Application of opaque gingiva layer, gingival ceramics build-up "pink aesthetics”, first firing, followed by correction build-up, and second firing, and ends with the glazing process.

TECHNOLOGY OF MEAT COOKING IN THE AUTOCLAVE WITH PRESERVATION OF CHEMICAL PROPERTIES OF ANIMAL RAW MATERIALS

2018 ◽  
Author(s):  
Inna Nazarenko ◽  
◽  
Nataliya Novosad ◽  
Keyword(s):  
Nutritional Value ◽  
Raw Materials ◽  
Meat Products ◽  
Chemical Properties ◽  
Periodic Action ◽  
Meat Cooking ◽  
Canned Meat ◽  
Long Term Preservation

The article examines the technology of cooking meat by autoclaving while preserving the chemical properties of the product. Autoclaving has been shown to be one of the main technological steps in canned meat. Sterilization of canned meat is a heat treatment of the product, which ensures the death of microflora to prevent microbiological spoilage at temperate temperatures (15-30oC), and if necessary at higher temperatures, and safety, which guarantees the microbiological indicators of the use of canned food for food. Sterilize meat at temperatures above 100o C, most often at temperatures up to 120o C. It has been determined that sterilization of meat in an autoclave determines the preservation of nutritional value, organoleptic properties, harmless to the consumer and creates the necessary prerequisites for long-term preservation of the quality of canned meat products. The technology of cooking meat is reduced to the choice of parameters (temperature and duration) of heating, which ensure maximum destruction of the microflora with minimal loss of nutritional value. Sterilization is carried out in autoclaves of periodic action. Banks with the product are loaded into the baskets of the autoclave, lowered into the autoclave, seal the device, heated to the desired temperature, withstand the required time, then release the pressure, cool and unload.

scholarly journals Wheeled Robot Dedicated to the Evaluation of the Technical Condition of Large-Dimension Engineering Structures

Robotics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 28
Author(s):  
Jarosław Domin ◽  
Marcin Górski ◽  
Ryszard Białecki ◽  
Jakub Zając ◽  
Krzysztof Grzyb ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Technical Condition ◽  
Fiber Reinforced Polymer ◽  
Loading Capacity ◽  
Engineering Structures ◽  
Reinforced Polymer ◽  
Wheeled Robot

There are many reasons why engineering structures are at risk of losing their loading capacity during their long-term exploitation, which may lead to hazardous states. In such cases, structures must be strengthened. The most popular technique of strengthening is based on the use of composite materials—fiber-reinforced polymer (FRP) elements attached to the structure with the special resins. FRP elements are applied externally, often in hard to reach places, which makes it difficult to diagnose the durability and quality of such a connection. In this study, a combination of a modern thermographic method was proposed, which makes it possible to assess the degree of damage to the contact of the structure with the composite material along with the running platform (wheeled robot) equipped with a set of diagnostic sensors. The development potential of such a solution for subsequent projects was also indicated.

scholarly journals Investigation of Laser Polishing of Four Selective Laser Melting Alloy Samples

2020 ◽  
Vol 10 (3) ◽  
pp. 760
Author(s):  
Dongqi Zhang ◽  
Jie Yu ◽  
Hui Li ◽  
Xin Zhou ◽  
Changhui Song ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Selective Laser Melting ◽  
Laser Power ◽  
Layer By Layer ◽  
Metal Powders ◽  
Laser Melting ◽  
Laser Polishing

Selective laser melting (SLM) is a layer by layer process of melting and solidifying of metal powders. The surface quality of the previous layer directly affects the uniformity of the next layer. If the surface roughness value of the previous layer is large, there is the possibility of not being able to complete the layering process such that the entire process has to be abandoned. At least, it may result in long term durability problem and the inhomogeneity, may even make the processed structure not be able to be predicted. In the present study, the ability of a fiber laser to in-situ polish the rough surfaces of four typical additive-manufactured alloys, namely, Ti6Al4V, AlSi10Mg, 316L and IN718 was demonstrated. The results revealed that the surface roughness of the as-received alloys could be reduced to about 3 μm through the application of the laser-polishing process, and the initial surfaces had roughness values of 8.80–16.64 μm. Meanwhile, for a given energy density, a higher laser power produced a laser-polishing effect that was often more obvious, with the surface roughness decreasing with an increase in the laser power. Further, the polishing strategy will be optimized by simulation in our following study.

scholarly journals The sperm longevity and freezability in the modified BHSV extender of Thai Pradu-hangdum chicken

2020 ◽  
Vol 19 (2) ◽  
pp. 161-172
Author(s):  
Chakorn Khunkaew ◽  
◽  
Prapas Patchanee ◽  
Sasithorn Panasophonkul ◽  
Zubing Cao ◽  
...  
Keyword(s):  
Sperm Concentration ◽  
Basic Knowledge ◽  
Acceptable Result ◽  
Pure Breed ◽  
Sperm Characters ◽  
The Mean ◽  
Motility Of Sperm ◽  
Long Term Preservation

Pradu-hangdum is a distinctive Thai native pure breed chicken. To conserve the pure breed of this chicken species, the artificial insemination was invested. The key to the highly successful output of this technique is high quality of semen. Hence, the objective of the present study is to characterize the Pradu-hangdam sperms and their longevity and freezability in the BHSV extender. The semen of the 30 randomized male chicken were collected. The macroscopic and microscopic examination were used to determine the sperm characters. The results revealed that the Pradu-hangdam sperms contained normal a spiral-shaped head, mid-piece and tail and normal white cream color. The mean number of sperm concentration was 5.24×109 ± 1.54 sperms/mL. The mean volume was 0.22 ± 0.08 mL. The results of longevity in mean total motility of sperm was 85.20%, 56.00% and 36.33% storage for 1, 24, and 48 hours after semen collection in extender, respectively. The longevity of sperm storage in extender decreased significantly at 24 and 48 hours (P<0.05). The freezability of Pradu-hangdam semen significant decreased from 81.45% to 57.02% of motility (P<0.05) but in the range of acceptable result for insemination. In conclusion, this study provides the basic knowledge of sperm characters and their longevity which decreases in relation to the time after collection even though it was preserved and frozen in the BHSV of the acceptable data. Furthermore, the freezing technique and fertility rate should be a further study in the long-term preservation of Pradu-hangdam sperms.

scholarly journals Amicon-adapted enhanced FASP: an in-solution digestion-based alternative sample preparation method to FASP

F1000Research ◽  
2015 ◽  
Vol 4 ◽  
pp. 140 ◽  
Author(s):  
David Pellerin ◽  
Hugo Gagnon ◽  
Jean Dubé ◽  
Francois Corbin
Keyword(s):  
Sample Preparation ◽  
Sodium Dodecyl ◽  
Low Molecular Weight ◽  
Proteome Coverage ◽  
Liquid Chromatography Tandem Mass ◽  
One Step ◽  
Megakaryoblastic Leukaemia ◽  
Long Term Preservation

Sample preparation is a crucial step for liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based proteomics. Sodium dodecyl sulfate (SDS) is a powerful denaturing detergent that allows for long-term preservation of protein integrity. However, as it inhibits trypsin and interferes with LC-MS/MS analyses, it must be removed from samples prior to these experiments. The Filter-Aided Sample Preparation (FASP) method is actually one of the preferred and simplest methods for such purpose. Nonetheless, there exist great disparities in the quality of outcomes when comparing FASP to other protocols depending on the authors, and recent reports have pointed to concerns regarding its depth of proteome coverage. To address these issues, we propose an Amicon-adapted in-solution-based enhanced FASP (eFASP) approach that relies on current best practices in comprehensive proteomics sample preparation. Human megakaryoblastic leukaemia cancer cells’ protein extracts were treated in parallel with both Amicon-adapted eFASP and FASP, quantified for remaining SDS and then analyzed with a 1-hr gradient LC-MS/MS run. The Amicon-adapted eFASP utilizes a passivated low molecular weight cut-off Amicon filter, and incorporates a cleaning step with a high-content deoxycholate buffer and a ‘one-step-two-enzymes’ trypsin/Lys-C in-solution digestion. Amicon-adapted eFASP was found more reproducible and deepened proteome coverage, especially for membrane proteins. As compared to FASP, Amicon-adapted eFASP removed much of SDS from high-protein samples and reached a notable depth of proteome coverage with nearly 1,700 proteins identified in a 1 hr LC-MS/MS single-run analysis without prior fractionation. Amicon-adapted eFASP can therefore be regarded as a simple and reliable sample preparation approach for comprehensive proteomics.

scholarly journals Co-ensiling garlic stalk with citrus pulp improves the fermentation quality and feed-nutritional value

2020 ◽  
Vol 33 (3) ◽  
pp. 436-445
Author(s):  
Youn Hee Lee ◽  
Farhad Ahmadi ◽  
Young Il Kim ◽  
Young-Kyoon Oh ◽  
Wan Sup Kwak
Keyword(s):  
Nutritional Value ◽  
Efficient Utilization ◽  
Citrus Pulp ◽  
Silage Fermentation ◽  
Fermentation Quality ◽  
Fermentation Parameters ◽  
Viable Method ◽  
Long Term Preservation

Objective: Ensiling is a simple and effective method for long-term preservation; however, less information exists about the ensilability characteristics of garlic stalk (GS). Therefore, the objectives were to examine the ensiling feasibility of GS.Methods: The GS was ensiled alone or inoculated with Lactobacillus plantarum KU5 in the presence or absence of 5% molasses and ensiled for 7, 14, and 28 d. As an alternative storage method, GS was co-ensiled with wet citrus pulp (CP) at different proportions (GS:CP: 70:30, 60:40, 50:50, and 40:60). Analysis was made on physicochemical, fermentative, and nutritional parameters.Results: The GS was found to be a biomass which is difficult to ensile. A combination of microbial inoculant and molasses was successful in the improvement of the silage fermentation quality of GS. Co-ensiling of GS with wet CP at the mixing ratio of 50:50 provided the most desirable silage fermentation parameters, including the substantial lactic acid formation, low final pH, minor effluent loss, and the more favorable organoleptic properties.Conclusion: Co-ensiling GS with CP appears to be a simple and viable method of conservation, enabling the more efficient utilization of these by-product resources over a prolonged period.

The Preservation of Electronic Records

2014 ◽  
pp. 318-333
Author(s):  
Sabrina Catani
Keyword(s):  
Digital Signature ◽  
Electronic Records ◽  
Department Heads ◽  
Recordkeeping System ◽  
Digital Repositories ◽  
Long Term Preservation

In the last few years, the Province of Forlì-Cesena has started a records digitization process aimed at producing digital records to be preserved permanently in trusted digital repositories. The main objectives of the study are the following: to test ways and methods for record creation; check the record links to the Protocol Register and the quality of the electronic recordkeeping system; and assess the record authenticity and reliability for long-term preservation. The case analyzes the digitization process for a special type of record called “decision acts.” These records are signed by the Department Heads and prepared using the ERMS software that manages every step of the workflow, including the integration with other systems and software. The project provides for the use of digital signature and open formats for records creation and subsequent preservation in trusted digital repositories.

scholarly journals Clinical assessment of Filtek Bulk Fill Posterior dental restorative meterial

2021 ◽  
Vol 9 (3) ◽  
pp. 457-462
Author(s):  
O.I. Marshalok ◽  
◽  
S.G. Mikhaylovskiy ◽  
A.A. Ivanova ◽  
D.B. Timokhina ◽  
...  
Keyword(s):  
Clinical Assessment ◽  
Dental Restoration ◽  
Layer By Layer ◽  
Restorative Material ◽  
Appearance Quality ◽  
Aesthetic Appearance ◽  
The World ◽  
Restorative Materials ◽  
Dental Restorative

At present we notice how much all processes in the world accelerated. This concerns both our life and healthcare, in particular, dentistry. Patients become more demanding and informed, they value their time, in turn, young doctors need much more time for restoration by layer-by-layer application of the material, than experienced doctors. In this context, a material is required that will permit to reduce the time of restauration. The article presents the results of assessment of the effectiveness of Filtek Bulk Fill Posterior restorative material of 3M ESPE manufacture in the practice of an aspiring dentist. The findings were assessed according to the criteria for assessments of restorative materials (Ryge’s criteria), by aesthetic appearance quality (AAQ) and also by the quality of direct dental restoration on the stage of rehabilitation.

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