Variants of the design of the dentition of the anterior segments with a progenic and prognathic ratio of edentulous jaws

2021 ◽  
pp. 20-26
Author(s):  
D.I. Aksyonov ◽  
Yu.N. Mayboroda ◽  
I.N. Aksenov
Keyword(s):  
Digital Data ◽  
Mean Square ◽  
Missing Teeth ◽  
Measuring Device ◽  
Anterior Teeth ◽  
Anterior Segments ◽  
The Right ◽  
Edentulous Jaws ◽  
Different Levels

Objective: To improve the prosthetic and aesthetic treatment of patients with complete absence of teeth, taking into account the development of an algorithm for determining the size of the sagittal gap of the frontal segments against the background of a progenic or prognathic ratio of the jaws and their combinations. Methods: A method of mathematical modeling based on digital data of the distance between the tops of the alveolar ridges of the frontal areas of the edentulous jaws has been developed using a designed measuring device. Results: The results of digital calculations based on the determination of the root-mean-square deviation of the interalveolar lines revealed a different amount of bends and configurations of the interalveolar gaps and median arches common to both parts of the frontal segments. Five main variants of the interalveolar fissure and 26 cases of symmetric or asymmetric arrangement of the tops of the alveolar ridges of the right and left sides were obtained. Accordingly, the divergence angles for each pair in the projection of the missing teeth had their own characteristics, which must be taken into account when deciding on the choice of tooth placement in each specific case. Conclusions: Based on the obtained digital interpolation ratios of the interalveolar lines and the angles of their inclination in relation to the midline, the anterior teeth are placed taking into account the level of the sagittal gap, the parameters of which have different levels of symmetry or asymmetry on the right and left sides.

scholarly journals Comparison of the accuracy of intraoral scans between complete-arch scan and quadrant scan

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Youn-Gyeong Moon ◽  
Kyung-Min Lee
Keyword(s):  
Third Molar ◽  
Careful Consideration ◽  
Missing Teeth ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Posterior Quadrant ◽  
Left Posterior ◽  
The Right ◽  
Best Fit ◽  
Posterior Area

Abstract Objective To compare the accuracy of complete-arch scans and quadrant scans obtained using a direct chairside intraoral scanner. Material and methods Intraoral scans were obtained from 20 adults without missing teeth except for the third molar. Maxillary and mandibular complete-arch scans were carried out, and 4 quadrant scans for each arch were performed to obtain right posterior, right anterior, left anterior, and left posterior quadrant scans. Complete-arch scans and quadrant scans were compared with corresponding model scans using best-fit surface-based registration. Shell/shell deviations were computed for complete-arch scans and quadrant scans and compared between the complete-arch scans and each quadrant scans. In addition, shell/shell deviations were calculated also for each individual tooth in complete-arch scans to evaluate factors which influence the accuracy of intraoral scans. Results Complete-arch scans showed relatively greater errors (0.09 ~ 0.10 mm) when compared to quadrant scans (0.05 ~ 0.06 mm). The errors were greater in the maxillary scans than in the mandibular scans. The evaluation of errors for each tooth showed that the errors were greater in posterior teeth than in anterior teeth. Comparing the right and left errors, the right side posterior teeth showed a more substantial variance than the left side in the mandibular scans. Conclusion The scanning accuracy has a difference between complete-arch scanning and quadrant scanning, particularly in the posterior teeth. Careful consideration is needed to avoid scanning inaccuracy for maxillary or mandibular complete-arch, particularly in the posterior area because a complete-arch scan might have potential error than a quadrant scan.

scholarly journals Determination of mechanical properties of soil under laboratory conditions

2014 ◽  
Vol 60 (Special Issue) ◽  
pp. S66-S69 ◽  
Author(s):  
V. Malý ◽  
M. Kučera
Keyword(s):  
Mechanical Properties ◽  
Penetration Depth ◽  
Measuring Device ◽  
Laboratory Conditions ◽  
Measuring Network ◽  
Set Up ◽  
Different Diameters ◽  
Different Levels ◽  
Properties Of Soil

This paper presents the mechanical properties of soil. In order to determine the properties of soil under laboratory conditions, a special measuring device was constructed, viz. a bevameter. Two types of soil with different levels of moisture were examined and their mechanical properties were determined. Measurements were taken of non-compressed soil. A measuring network was set up, consisting of measuring and recording devices. In the course of measuring, the force and penetration depth of the pressing plate were recorded simultaneously. Three different diameters of pressing plate were used, namely 38, 50 and 70 mm. The pressure on the contact area was calculated after completion of the measurements, and the relationships between pressure and penetration depth were presented graphically.

scholarly journals Hypodontia. Does the Prevalence and Distribution Pattern Differ in Orthodontic Patients?

2007 ◽  
Vol 01 (03) ◽  
pp. 167-173 ◽  
Author(s):  
Yildiray Sisman ◽  
Tancan Uysal ◽  
Ibrahim Erhan Gelgor
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Modalities ◽  
Team Approach ◽  
Missing Teeth ◽  
Multidisciplinary Team Approach ◽  
Anterior Teeth ◽  
Wide Range ◽  
Orthodontic Patients ◽  
The Right ◽  
Gender Specific

ABSTRACTObjective: The aim of this study was to document the prevalence of hypodontia in the permanent dentition among a group of Turkish sample who sought orthodontic treatment and to compare present results with the specific findings of other populations. The occurrence was evaluated in relation to gender, specific missing teeth, the location and pattern of distribution in the maxillary and mandibular arches and right and left sides.Materials And Methods: Orthodontic files of 2413 patients (1557 females-mean age: 17.78±5.41 years old and 856 males-mean age:17.02±5.47 years old) which included orthopantomograms, study models, and anamnestic data were examined for evidence of hypodontia.Results: The prevalence of hypodontia was 7.54% (8.09% for female and 6.54% for male). Hypodontia was found considerably more frequently in the maxilla than in the mandible. Similarity in the distribution of missing teeth between the right and left sides was detected. The most frequently missing teeth were the maxillary lateral incisors, followed by the mandibular and maxillary second premolars. The majority of patients had one or two teeth missing, but seldom three or more.Conclusions: Present data for hypodontia were within the wide range reported in the literature. The findings of patients with hypodontia involving the anterior teeth and others missing more than two teeth in the same quadrant were an indication of a great need for orthodontic treatment. By early detection of missing teeth, alternative treatment modalities can be planned and performed with a multidisciplinary team approach. (Eur J Dent 2007;1:167-173)

Myofunctional parameters in patients using full removable dentures with progenic and prognathic ratio of the anterior segments of the edentulous jaws

2021 ◽  
pp. 27-31
Author(s):  
D.I. Aksyonov ◽  
Yu.N. Mayboroda ◽  
E.A. Bragin ◽  
I.N. Aksyonov
Keyword(s):  
Statistical Processing ◽  
Masticatory Muscles ◽  
Digital Data ◽  
Control Group ◽  
Student’S T ◽  
Anterior Segments ◽  
Artificial Teeth ◽  
Edentulous Jaws ◽  
Student’S T Test ◽  
Made In

The aim study was to construct artificial dentitions based on the method of mathematical modeling with the progenic and prognatic ratios of toothless frontal segments and to analyze the functional activity of the masticatory muscles in patients using dentures made in this way, compared with standard prosthetic structures. To compare and interpret the data obtained, electromyographic studies were performed in the control group (16 people), whose teeth were made using the traditional method, and the main group (22 people), whose artificial teeth were formed according to individual mathematical calculations, taking into account the size of the sagittal gap of the frontal segments of the progenic and prognatic ratio of toothless jaws. Statistical processing of the results of the electro-myographic study was carried out using the Statistica application software package. The digital data were processed by the method of variational statistics using the Student's t-test. The analysis of the obtained data showed the advantages of using individual mathematical calculations when solving the issue of tactics for constructing dentitions in the frontal segment of toothless jaws, taking into account the degree of the sagittal gap in the progenic and prognatic correlation of the jaws and their possible combinations.

scholarly journals Assessment efficiency aesthetic results of modern methods for determining the color of teeth in prosthodontics

2020 ◽  
Vol 103 (4) ◽  
pp. 46-51
Author(s):  
G. Hakobyan ◽  
◽  
L. Essayain ◽  
N. Vanyan ◽  
A. Hakobyan ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Visual Analysis ◽  
Instrumental Method ◽  
Visual Evaluation ◽  
Measuring Device ◽  
Results Of Treatment ◽  
Color Determination ◽  
The Right ◽  
Instrumental Methods

Abstracts. Shade matching is one of the most important factor in a successful and esthetically restoration. The number of mistakes made by dentists when choosing a color is 14 % (according to Barna), 9.9 % (according to Moser) and 8.2 % (according to Mc Maugh). The ability to consistently match shades accurately can help reduce the number of unsatisfactory esthetic results treatment. Matching the right color leads to a pleasing appearance and satisfaction for the patient and the clinician. Color determination in dentistry can be divided into two categories visual and instrumental. The most popular shade guides include visual classical shade the Vita Classical and are clustered into letter groups A (red-yellow), B (yellow), C (grey), D (red-yellow-gray), and chroma designated with the numerical values (e.g. A1). Used computerassisted shade analysis is more accurate and more consistent compared with human shade assessment. The objective of the study a comparative assess of the esthetic indicators of the prosthodontics treatment when determining color using visual and instrumental methods. For the period from 2015–2020 prosthodontic treatment of 158 patients with dental defects was performed. To assess the esthetic results of treatment, the patient was divided into 2 groups. In 1 group (n = 82) patients, the color determination of the prosthodontics design was carried out using standard colors according to the usual VITA scale. In 2 group (n = 76) patients, the color determination of the prosthodontics design was carried out using a color measuring device VITA Easy shade Compact. The results showed that the Vita Easy Shade machine was accurate 97.5 %, visual evaluation method was accurate 85.2 %. This study reveals that esthetic results is a significant factor in patient satisfaction, which should be evaluated. Instrumental methods for determining the color of teeth are more accurate than visual and do not depend on the subjective sensations and psychological factors of the dentist. At the moment, the combination of the Vita Easy shade system and the 3D Vita scale is the most effective in determining tooth shade or restoration. However, the instrumental method cannot replace traditional methods. Digital techniques should be a must in addition to visual analysis.

scholarly journals IT&C support for decision making in notary offices

2013 ◽  
Vol 3 (2) ◽  
pp. 1
Author(s):  
George Schin ◽  
Margareta Racovita
Keyword(s):  
Decision Making ◽  
Development Strategy ◽  
Business Development ◽  
Point Of View ◽  
Feasibility Analysis ◽  
Optimal Decision ◽  
Expected Values ◽  
The Right ◽  
Different Levels

The aim of this paper is to determine the most efficient strategic alternative in the case of a notary office, by taking into account the expected values associated to different levels of supplementary services requests by its customers. The determination of expected monetary values associated to the strategic alternatives by means of WinQSB software confirms the hypotheses concerning the feasibility analysis results and the manager’s ability to make the right decision from the financial point of view. Thus, the manager of the notary office will be able to make efficient decisions regarding the business development plan by using appropriate software tools, which deliver real time results in different simulation scenarios. Once the optimal decision is found, the notary office can seek to improve its business development strategy by taking into account more options and levels of supplementary services requests from the part of its customers.

THE FACTORS OF CAREER SELF-DETERMINATION OF STUDENTS OF HIGHER EDUCATION INSTITUTIONS

2019 ◽  
Vol 7 (1) ◽  
pp. 9-20
Author(s):  
Inna Yeung
Keyword(s):  
Higher Education ◽  
Higher Education Institutions ◽  
Well Being ◽  
Young Person ◽  
Self Determination ◽  
Full Time ◽  
Actual Problem ◽  
The Third ◽  
The Right

Choice of profession is a social phenomenon that every person has to face in life. Numerous studies convince us that not only the well-being of a person depends on the chosen work, but also his attitude to himself and life in general, therefore, the right and timely professional choice is very important. Research about factors of career self-determination of students of higher education institutions in Ukraine shows that self-determination is an important factor in the socialization of young person, and the factors that determine students' career choices become an actual problem of nowadays. The present study involved full-time and part-time students of Institute of Philology and Mass Communications of Open International University of Human Development "Ukraine" in order to examine the factors of career self-determination of students of higher education institutions (N=189). Diagnostic factors of career self-determination of students studying in the third and fourth year were carried out using the author's questionnaire. Processing of obtained data was carried out using the Excel 2010 program; factorial and comparative analysis were applied. Results of the study showed that initial stage of career self-determination falls down on the third and fourth studying year at the university, when an image of future career and career orientations begin to form. At the same time, the content of career self-determination in this period is contradictory and uncertain, therefore, the implementation of pedagogical support of this process among students is effective.

On-the-Fly Determination of Active Region Centers in Adaptive-Partitioning QM/MM

2020 ◽  
Author(s):  
Zenghui Yang
Keyword(s):  
Quantum Mechanics ◽  
Active Region ◽  
Molecular Mechanics ◽  
Active Regions ◽  
Available Energy ◽  
Adaptive Partitioning ◽  
Different Levels

Quantum mechanics/molecular mechanics (QM/MM) methods partition the system into active and environmental regions and treat them with different levels of theory, achieving accuracy and efficiency at the same time. Adaptive-partitioning (AP) QM/MM methods allow on-the-fly changes to the QM/MM partitioning of the system. Many of the available energy-based AP-QM/MM methods partition the system according to distances to pre-chosen centers of active regions. For such AP-QM/MM methods, I develop an adaptive-center (AC) method that allows on-the-fly determination of the centers of active regions according to general geometrical or potential-related criteria, extending the range of application of energy-based AP-QM/MM methods to systems where active regions may occur or vanish during the simulation.

KEBIJAKAN MODERASI PIDANA MATI

2017 ◽  
Vol 10 (2) ◽  
pp. 193
Author(s):  
Mei Susanto ◽  
Ajie Ramdan
Keyword(s):  
Human Rights ◽  
Death Penalty ◽  
Capital Punishment ◽  
Criminal Code ◽  
Right To Life ◽  
Life Imprisonment ◽  
Research Results ◽  
Moderation Model ◽  
The Right

ABSTRAKPutusan Nomor 2-3/PUU-V/2007 selain menjadi dasar konstitusionalitas pidana mati, juga memberikan jalan tengah (moderasi) terhadap perdebatan antara kelompok yang ingin mempertahankan (retensionis) dan yang ingin menghapus (abolisionis) pidana mati. Permasalahan dalam penelitian ini adalah bagaimana kebijakan moderasi pidana mati dalam putusan a quo dikaitkan dengan teori pemidanaan dan hak asasi manusia dan bagaimana kebijakan moderasi pidana mati dalam RKUHP tahun 2015 dikaitkan dengan putusan a quo. Penelitian ini merupakan penelitian doktrinal, dengan menggunakan bahan hukum primer dan sekunder, berupa peraturan perundang-undangan, literatur, dan hasil-hasil penelitian yang relevan dengan objek penelitian. Penelitian menyimpulkan, pertama, putusan a quo yang memuat kebijakan moderasi pidana mati telah sesuai dengan teori pemidanaan khususnya teori integratif dan teori hak asasi manusia di Indonesia di mana hak hidup tetap dibatasi oleh kewajiban asasi yang diatur dengan undang-undang. Kedua, model kebijakan moderasi pidana mati dalam RKUHP tahun 2015 beberapa di antaranya telah mengakomodasi amanat putusan a quo, seperti penentuan pidana mati di luar pidana pokok, penundaan pidana mati, kemungkinan pengubahan pidana mati menjadi pidana seumur hidup atau penjara paling lama 20 tahun. Selain itu masih menimbulkan persoalan berkaitan dengan lembaga yang memberikan pengubahan pidana mati, persoalan grasi, lamanya penundaan pelaksanaan pidana mati, dan jenis pidana apa saja yang dapat diancamkan pidana mati.Kata kunci: kebijakan, KUHP, moderasi, pidana mati. ABSTRACTConstitutional Court’s Decision Number 2-3/PUU-V/2007, in addition to being the basis of the constitutionality of capital punishment, also provides a moderate way of arguing between retentionist groups and those wishing to abolish the death penalty (abolitionist). The problem in this research is how the moderation policy of capital punishment in aquo decision is associated with the theory of punishment and human rights and how the moderation policy of capital punishment in the draft Criminal Code of 2015 (RKUHP) is related with the a quo decision. This study is doctrinal, using primary and secondary legal materials, in the form of legislation, literature and research results that are relevant to the object of analysis. This study concludes, firstly, the aquo decision containing the moderation policy of capital punishment has been in accordance with the theory of punishment, specificallyy the integrative theory and the theory of human rights in Indonesia, in which the right to life remains limited by the fundamental obligations set forth in the law. Secondly, some of the modes of moderation model of capital punishment in RKUHP of 2015 have accommodated the mandate of aquo decision, such as the determination of capital punishment outside the main punishment, postponement of capital punishment, the possibility of converting capital punishment to life imprisonment or imprisonment of 20 years. In addition, it still raises issues regarding the institutions that provide for conversion of capital punishment, pardon matters, length of delay in the execution of capital punishment, and any types of crime punishable by capital punishment. Keywords: policy, criminal code, moderation, capital punishment.

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