scholarly journals The effect of microstructure of the surface, the design and dimension of dental implants on their stability and the process of osteointegration during immediate and delayed implantation. PartII

2021 ◽  
Vol 108 (4) ◽  
pp. 34-38
Author(s):  
P. Grishin ◽  
◽  
E. Mamaeva ◽  
E. Kalinnikova ◽  
A. Kozlov ◽  
...  
Keyword(s):  
Primary Stability ◽  
Implant Surface ◽  
Surface Design ◽  
Resonance Analysis ◽  
Delayed Implantation ◽  
Size Type ◽  
The Stability ◽  
The Moment ◽  
Immediate Implantation

Abstract. This article presents the results of a clinical study of the stability and process of osteointegration implants of 11 known implant dental systems. The effect of the microstructure of 3 types of implant surface (HSTTM, SLA and RBM) and their design features (shape, size, type of carving) on the indicators of their stability and osteointegration process during immediate and delayed implantation with immediate functional load is shown and analyzed. The stability of the implants and the dynamics of the quality of osteointegration were determined by the devices «Osstell Mentor» and «Periotest» in the process of treatment, starting from the moment of implant installation in different eras (2 weeks, 1 month, 2 months and 3 months). 414 patients between the ages of 20 and 70 were monitored. Of these, there are 249 and 165 male women. The average age of the operated patients was: for men – 54 years for women – 49 years. All patients were divided into two groups of the first – 109 patients who after extraction were directly implanted into the hole of the remote tooth with the subsequent immediate load, the second group – 305 patients who were delayed implantation with immediate load. A total of 1,302 implants were installed. The study revealed a link between the type of surface of the implant, primary stability and the time of its osteointegration during certain periods of clinical observation. The results of the study demonstrated the important role of combining microstructure of the surface, design and dimension features, the type of insertion of implants on their primary stability and the process of osteointegration in the conduct of both immediate and delayed implantation. Key words: frequency resonance analysis, damping, stability, osteointegration, fixation, implants, periotestometry, immediate implantation.

scholarly journals The effect of microstructure of the surface, the design and dimension of dental implants on their stability and the process of osteointegration during immediate and delayed implantation

2021 ◽  
Vol 107 (3) ◽  
pp. 58-63
Author(s):  
P. Grishin ◽  
◽  
E. Mamaeva ◽  
E. Kalinnikova ◽  
A. Kozlov ◽  
...  
Keyword(s):  
Primary Stability ◽  
Implant Surface ◽  
Surface Design ◽  
Resonance Analysis ◽  
Delayed Implantation ◽  
Size Type ◽  
The Stability ◽  
The Moment ◽  
Immediate Implantation

Abstract. This article presents the results of a clinical study of the stability and process of osteointegration implants of 11 known implant dental systems. The effect of the microstructure of 3 types of implant surface (HSTTM, SLA and RBM) and their design features (shape, size, type of carving) on the indicators of their stability and osteointegration process during immediate and delayed implantation with immediate functional load is shown and analyzed. The stability of the implants and the dynamics of the quality of osteointegration were determined by the devices «Osstell Mentor» and «Periotest» in the process of treatment, starting from the moment of implant installation in different eras (2 weeks, 1 month, 2 months and 3 months). 414 patients between the ages of 20 and 70 were monitored. Of these, there are 249 and 165 male women. The average age of the operated patients was: for men – 54 years for women – 49 years. All patients were divided into two groups of the first – 109 patients who after extraction were directly implanted into the hole of the remote tooth with the subsequent immediate load, the second group – 305 patients who were delayed implantation with immediate load. A total of 1,302 implants were installed. The study revealed a link between the type of surface of the implant, primary stability and the time of its osteointegration during certain periods of clinical observation. The results of the study demonstrated the important role of combining microstructure of the surface, design and dimension features, the type of insertion of implants on their primary stability and the process of osteointegration in the conduct of both immediate and delayed implantation. Key words: frequency resonance analysis, damping, stability, osteointegration, fixation, implants, periotestometry, immediate implantation.

scholarly journals CLINICAL STUDIES OF THE STABILITY AND PROCESS OF OSTEOINTEGRATION OF DENTAL IMPLANTS DURING IMMEDIATE AND DELAYED IMPLANTATION

2021 ◽  
Vol 16 (4) ◽  
pp. 97-103
Author(s):  
Petr Grishin ◽  
Elena Kalinnikova
Keyword(s):  
Dental Implants ◽  
Clinical Studies ◽  
Alveolar Bone ◽  
Primary Stability ◽  
Implant Surface ◽  
Delayed Implantation ◽  
Clinical Observations ◽  
Osseointegrated Implants ◽  
Surface Microstructures ◽  
The Stability

Subject. Analysis of the literature confirms that there is a definite relationship between surface microstructure, implant geometry, thread design and primary stability, and osseointegration processes. To date, a sufficient number of works on direct and delayed implantation have accumulated. However, there is not enough convincing clinical data on the quantitative assessment of primary stability at different periods of the osseointegration process. Despite the existence of experimental and clinical observations, it seems impossible to make a definite judgment about the mechanism of such a relationship. This chapter presents clinical studies of the stability and osseointegration of dental implants when performing, according to the indications, in 414 patients of direct and delayed implantation using implant systems with different surface microstructures. Goal. Conduct clinical studies of quantitative indicators of stability and osseointegration of implants with different microstructure of the surface during direct and delayed implantation. Methodology. For the clinical study of primary stability and the process of osseointegration during direct and delayed implantation with immediate functional loading, implant systems with different surface microstructures were used: Alfa Bio, Mis, Astra-Tech, Dentium, Ostem, Antogher, and also Humana Dental with an innovative surface. Osseointegrated implants have been used to achieve a predictable treatment outcome in clinical cases with partial or complete adentia, as well as in the presence of single, included defects. Results. There were no significant differences in stability indicators at the time of implant placement in the alveolar bone, depending on the type of implant and the method of implantation. Conclusions. In the process of integration of the implant into the bone tissue at a later date, the indicators of stability and osseointegration improve. The relationship between the appearance of the implant surface, primary stability and the time of its adaptation was revealed.

scholarly journals The Role of Cations of the Precipitant in the Interaction of Protein Molecules in the Lysozyme Oligomers in Crystallization Solutions

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1534
Author(s):  
Yuliya V. Kordonskaya ◽  
Vladimir I. Timofeev ◽  
Yulia A. Dyakova ◽  
Margarita A. Marchenkova ◽  
Yury V. Pisarevsky ◽  
...  
Keyword(s):  
Protein Crystallization ◽  
Structural Transformations ◽  
Atomic Mass ◽  
Crystal Formation ◽  
Noticeable Effect ◽  
Protein Molecules ◽  
The Stability ◽  
The Moment ◽  
Dynamics Method

At the moment, the main opinion is that protein crystallization depends mainly on the the precipitant anions, therefore, there have been only few works devoted to the problem of the influence of its cations. Using the molecular dynamics method, we investigated the stability, changes in the compactness and structural transformations of lysozyme dimers and octamers in solutions with different precipitants (LiCl, NaCl, KCl and CuCl2) in order to study the contribution of cations during crystal formation in more detail. As a result, we found that cations have a rather noticeable effect on the behavior of oligomers: the higher the atomic mass of the cation, the greater the changes in the dimers structures during its dynamics and, according to the data of SAXS experiments, the lower the concentration of dimers. However, for octamers, this dependence is more complicated.

scholarly journals Reminiscing and the Passage of Years: Investigating the Role of Affective Autobiographical Memories in Passage of Time Judgments

2021 ◽  
Vol 12 ◽  
Author(s):  
Ferdinand Kosak ◽  
Christof Kuhbandner
Keyword(s):  
Negative Events ◽  
Autobiographical Memories ◽  
Experience Of Time ◽  
The Stability ◽  
The Moment ◽  
Affective Intensity ◽  
Positive Memories ◽  
Negative Memories ◽  
Contextual Change

Previous research has shown that judgments of the experienced velocity of recent years passing by vary depending on the number of autobiographical memories being activated in the moment of judging. While a body of evidence shows affect to have an impact on both prospective and retrospective judgments on the experience of time for short periods, the effect of valence of memories on the experience of the passage of long intervals has not been examined yet. Thus, we asked 282 people to retrieve five either emotionally positive or negative memories from the last 5years before judging the subjectively experienced passage of time of these years. However, positive and negative events differ in some ways beyond valence, e.g., the ascribed impact on the participants’ subsequent lives as well as the stability of ascribed affective intensity: The latter decreased over time for negative but not for positive memories while ascribed impact was markedly higher for positive memories. Results indicate no significant differences between the two conditions, even after controlling for the aforementioned differences. However, exploratory analyses show that participants rate time to have passed faster, the longer the activated memories dated back on average, a result that seems in line with contextual-change hypothesis.

scholarly journals Clinical studies feature immediate implantation and immediate load using HUMANA DENTAL implant system

2020 ◽  
Vol 43 (4) ◽  
pp. 560-572
Keyword(s):  
Dental Implant ◽  
Clinical Studies ◽  
Primary Stability ◽  
Positive Effects ◽  
Dental Implantation ◽  
Quantitative Characteristics ◽  
The Stability ◽  
Implant System ◽  
Immediate Implantation ◽  
Qualitative And Quantitative Characteristics

This article presents the results of a comparative analysis of the qualitative and quantitative characteristics of electronic and energy-dispersing X-ray spectroscopy to identify the optimal indicators of the surface structure of dental implants of different systems, which can ensure the stability, osteointegration and success of dental implantation. As a result of the study of the innovative surface, HSTТМ received a rough, unique, structured, and clean surface that meets the international criteria of ISIS and is devoid of the identified flaws of the surfaces of SLA and RBM. Clinical studies of immediate dental implantation and immediate load using surface implants, HSTТМ. In 104 patients, positive effects of surface quality characteristics were found to be positive. for primary stability, osteointegration, implant success and was a prerequisite for recommending the use of Humana Dental implant system in direct implantation with subsequent load.

scholarly journals Nullity of Administrative Acts: Grounds, Legal Regime, Discretion

2021 ◽  
Vol 18 (2) ◽  
pp. 228-242
Author(s):  
O. N. Sherstoboev
Keyword(s):  
Legal Doctrine ◽  
Judicial Practice ◽  
Legal Method ◽  
Administrative Procedures ◽  
Legitimate Expectations ◽  
Administrative Act ◽  
The Stability ◽  
The Moment ◽  
Legal Concepts

The issues of criteria for the nullity of administrative acts are considered, the ratio of an illegal and invalid act, as well as a null and void act, analyzed, the possibility of administrative discretion in determining an invalid administrative act is analyzed, the role of vague legal concepts when an administrative act is declared invalid is demonstrated. The Author uses a comparative legal method, including the analysis of the practice of Germany, Great Britain, South Africa, Canada, Japan, South Korea, Russia and other countries. Special attention is paid to the laws on administrative procedures adopted in the post-Soviet territory and the influence of the German doctrine on this process. It is concluded that for the continental legal order the most preferable way to formalize the criteria for the invalidity of an administrative act are laws on administrative procedures or their analogs, while in the common law states, legal doctrine and judicial practice are of great importance. At the same time, many countries avoid recognizing acts as null and void, preferring the construction of their voidability. This is related to ensuring the stability of public administration, the predictability of administrative activities, and the protection of legitimate expectations. In any case, the theory of the reality of the administrative act is prevailing, and nullity is rather viewed as an anomaly. Therefore, only acts that are adopted with the most significant violations, which do not allow talking about the fair consequences of their adoption, are considered invalid. The illegality of an act does not automatically entail its nullity. A similar trend can be traced in Russia, although individual norms of law and practice of courts indicate the possible formation of a doctrine of the invalidity of an administrative act in the Russian legal system. Insignificant acts do not give rise to consequences from the moment of their adoption, legally they do not exist, and nothing can generate anything. With this approach, the courts only fix the criterion of invalidity without a dispute about law. Insignificant acts should be distinguished from contested ones, the latter may turn out to be illegal, but for a number of reasons (for example, protection of trust) the fact of their existence is confirmed along with their consequences.

A Statistical Study of Process Variables to Optimize a High Speed Curtain Coater: Part I

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 20-26 ◽  
Author(s):  
PEEYUSH TRIPATHI ◽  
MARGARET JOYCE ◽  
PAUL D. FLEMING ◽  
MASAHIRO SUGIHARA
Keyword(s):  
Boundary Layer ◽  
Experimental Design ◽  
High Speed ◽  
Statistical Study ◽  
Process Variables ◽  
High Speeds ◽  
The Stability ◽  
Air Removal ◽  
Removal System

Using an experimental design approach, researchers altered process parameters and material prop-erties to stabilize the curtain of a pilot curtain coater at high speeds. Part I of this paper identifies the four significant variables that influence curtain stability. The boundary layer air removal system was critical to the stability of the curtain and base sheet roughness was found to be very important. A shear thinning coating rheology and higher curtain heights improved the curtain stability at high speeds. The sizing of the base sheet affected coverage and cur-tain stability because of its effect on base sheet wettability. The role of surfactant was inconclusive. Part II of this paper will report on further optimization of curtain stability with these four variables using a D-optimal partial-facto-rial design.

PINGVINAS IR PROTĖJAS. Įsivaizdavimas kaip kitybė manyje

2007 ◽  
Vol 4 ◽  
pp. 21-37
Author(s):  
Kristupas Sabolius
Keyword(s):  
Fight Club ◽  
The World ◽  
The Moment ◽  
Hollywood Movie

Kitybės klausimas dažniausiai kyla iš ego santykio su kitais arba su pasauliu. Šiame straipsnyje daroma prielaida, kad įsivaizdavimo funkcija ištirpdo subjektą ir jame pačiame atveria intersubjektyvią perspektyvą. Šiuo tikslu sugretinami Sartre’o, Husserlio bei Merleau-Ponty įsivaizdavimo funkcijos tyrimai, kuriuose išryškėja vaizdo kaip iš ego centro išslystančios ribos statusas, ir Holivudo filmo „Kovos klubas“ siužetas. Viename iš šios juostos epizodų pasirodantis pingvinas žymi egologinės schizmos akimirką ir tampa fantazijos apsireiškimu ir įsikūnijimu.Išgryninus žaidybinį, savarankišką ir multiformišką charakterį, galime konstantuoti, kad įsivaizdavimas, jei kalbėtume Kanto terminais, yra ne papildanti tarpinė funkcija, bet transcendentalinio subjekto genezėje atlieka paradoksalų „svetimos vidujybės“ arba „vidinės svetimybės“ vaidmenį. Vaizduotė yra katalizatoriaus, kuris, likdamas šalia, įgalina transcendentalinių formų išsikristalizavimą.Pagrindiniai žodžiai: vaizduotė, įsivaizdavimas, fantazija, ego, kitybė, sąmonė.PENGUIN AND PROTEUSImagination as Otherness in meKristupas Sabolius SummaryThe question of Otherness is usually taken into account while discussing the Ego’s relation with Others as well as with the World. This article is based on the premises that the function of phantasy melts the subjectivity, revealing the perspective of intersubjectivity within it. On this purpose Sartre’s, Husserl’s and Merleau-Ponty’s researches on the function of imagination, which elucidate the image as the boundary slipping from the centre of Ego, are compared to the story of Hollywood’ movie „Fight Club“. The penguin, which appears in one of the episodes, registers the moment of egological schism, thus becoming the revelation and incarnation of phantasy. While the playful, autonomous and multiform character of imaginary is cleared out, we can ascertain, speaking in Kantian terms, that it has not a complementary or intermediary function, but, in the genesis of transcendental subject, plays the paradoxical role of „allien innerness“ or „inner alienity“. Thought remaining always beside, imagination is a catalyzer which enables crystallization of transcendental forms.Keywords: imagination, imaginary, phantasy, ego, otherness, consciousness.

The Role of Hydrophobicity in the Stability and pH-Switchability of (RXDX)4 and Coumarin-RXDX Conjugate β-Sheets

2020 ◽  
Author(s):  
Ryan Weber ◽  
Martin McCullagh
Keyword(s):  
Biological Imaging ◽  
Ph Sensing ◽  
Hydrophobic Residue ◽  
Ideal Candidate ◽  
Self Assembling ◽  
Sensing Applications ◽  
Β Sheets ◽  
The Stability ◽  
Dynamics Simulations

<p>pH-switchable, self-assembling materials are of interest in biological imaging and sensing applications. Here we propose that combining the pH-switchability of RXDX (X=Ala, Val, Leu, Ile, Phe) peptides and the optical properties of coumarin creates an ideal candidate for these materials. This suggestion is tested with a thorough set of all-atom molecular dynamics simulations. We first investigate the dependence of pH-switchabiliy on the identity of the hydrophobic residue, X, in the bare (RXDX)<sub>4</sub> systems. Increasing the hydrophobicity stabilizes the fiber which, in turn, reduces the pH-switchabilty of the system. This behavior is found to be somewhat transferable to systems in which a single hydrophobic residue is replaced with a coumarin containing amino acid. In this case, conjugates with X=Ala are found to be unstable and both pHs while conjugates with X=Val, Leu, Ile and Phe are found to form stable β-sheets at least at neutral pH. The (RFDF)<sub>4</sub>-coumarin conjugate is found to have the largest relative entropy value of 0.884 +/- 0.001 between neutral and acidic coumarin ordering distributions. Thus, we posit that coumarin-(RFDF)<sub>4</sub> containing peptide sequences are ideal candidates for pH-sensing bioelectronic materials.</p>

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