scholarly journals DETERMINATION OF THE STRESSED-DEFORMED STATUS OF THE LOWER JAW NUMEROUS-ANALYTICAL OPTIONAL METHOD OF BOUNDARY ELEMENTS

2019 ◽  
Vol - (1(14)) ◽  
pp. 33-38
Author(s):  
L. V. Kolomiets ◽  
◽  
V. F. Orobey ◽  
O. M. Lymarenko ◽  
A. S. Lymarenko ◽  
...  
Keyword(s):  
Boundary Elements ◽  
Lower Jaw ◽  
Method Of Boundary Elements

scholarly journals Relationship between the Types of Malocclusion and the Localization of Headaches in Adults

2021 ◽  
Vol 11 (2) ◽  
pp. 197-200
Author(s):  
Natalya Didenko ◽  
Arcady Vyazmin ◽  
Evgeniy Mokrenko ◽  
Vladimir Gazinskiy ◽  
Maria Suslikova ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Adult Patients ◽  
Temporal Region ◽  
Temporal Part ◽  
Parietal Region ◽  
Jaw Movements ◽  
Lower Jaw ◽  
Plaster Models ◽  
Longitudinal Seam

The aim of this study was to investigate the manifestations of headaches in adult patients with types of malocclusion and occlusion deformities. Methods and Results: The study was conducted in 171 adult patients (43 men and 128 women) with malocclusion and occlusion deformities at the age of 18 to 62 years old, who were examined in the orthopedic dentistry clinic. The nature of the dentition closing was studied directly in the patient's oral cavity, and with the help of the "Gnatomat" universal articulator on diagnostic plaster models of the jaws. The occlusal relationships of the teeth were analyzed in the position of the central, anterior, lateral and dynamic occlusions. The biomechanics of the lower jaw movements were studied in 3 mutually perpendicular directions. The detected anomalies and deformities of the occlusion were grouped as sagittal, transversal and vertical. Each group was diagnosed as independent forms of malocclusion, and combined with other anomalies and deformities of the dentoalveolar system. All the subjects were asked to answer the questions of a questionnaire specially developed for our study. The unified questionnaire was developed based on a modified rating questionnaire and the determination of the life disorders index in neck pain. The questionnaire includes blocks of questions aimed at identifying the localization of the headache in the temporal, parietal (in one or both) regions, occipital, frontal regions and in the longitudinal seam region. We identified complaints of patients with pain in adjacent regions of the head. Of the 171 examined adult patients with malocclusion and occlusion deformities, 99 (57.9%) complained of headaches. The presence of a headache in the parietal region of the head was associated most often with sagittal and transversal malocclusions. The presence of a headache in the temporal part of the head was associated often with vertical malocclusion The results of correlation analysis showed that pain in 2 regions of the head was associated with malocclusion: the temporal region (rb=0.9892, P=0.0013) and parietal region (rb=0.9712, P=0.0058). Other regions were not statistically significantly associated with malocclusion. Conclusion: There is a certain relationship between the types of malocclusion, occlusion deformities and localization of headaches in adults. Headaches in the parietal and temporal regions of the head are associated with malocclusion and occlusion deformities more often. The obtained data can serve as a basis for the development of recommendations for appropriate corrective measures in orthodontic practice.

scholarly journals XI. On the fossil mammals of Australia. —part VII. Genus phascolomys: species exceeding the existing ones in size

1872 ◽  
Vol 162 ◽  
pp. 241-258 ◽  
Keyword(s):  
British Museum ◽  
Fossil Species ◽  
Geological Society ◽  
Fossil Mammals ◽  
Lower Jaw ◽  
Upper Jaw ◽  
The Right

In a former communication I applied the cranial, mandibular, and dental characters of the existing species of Wombat to the determination of the fossil species resembling them in size; in the present are given the results of an easier task, viz. the determination of extinct Wombats of markedly superior size to any now living; and I shall describe the fossils as the species they represent progressively predominate in bulk. 1. Phascolomys medius , Ow. —This species is represented by a lower jaw, fractured at both ends, presented by Sir Charles Nicholson, Bart., to the Geological Society of London; also by the fore part of the upper jaw of two individuals and by the right ramus, fractured at both ends, of the lower jaw, obtained by Edward S. Hill, Esq., from freshwater deposits exposed in the bed of a tributary of the Condamine River, at Eton Vale, Queensland: the latter were submitted to me in 1865, and have been liberally presented, with other Queensland fossils, to the British Museum by Sir Daniel Cooper, Bart. All these fossils are in the usual heavy, petrified, rolled, and more or less mutilated condition of such remains from the above formation and locality.

scholarly journals Calculation of plate-beam systems by method of boundary elements

2018 ◽  
Vol 7 (2.23) ◽  
pp. 238 ◽  
Author(s):  
Mykola Surianinov ◽  
Oleksii Shyliaiev
Keyword(s):  
Finite Elements ◽  
Fundamental System ◽  
Boundary Elements ◽  
Algebraic Equations ◽  
Contact Conditions ◽  
Small System ◽  
Beam System ◽  
Linear Algebraic Equations ◽  
Method Of Boundary Elements ◽  
Load Vector

The approach to calculation of plate-beam systems by numerical and analytical method of boundary elements is proposed. The method consists in construction in analytical way a fundamental system of solutions, the Green’s function and external load vector for the problem under consideration. Small system of linear algebraic equations to be solved numerically is constructed to take into account the boundary conditions or contact conditions between separate modules.The series of plate-beam system calculations by methods of boundary elements and finite elements at different geometric parameters of plate was performed to assess the limits of applicability of developed theory. The comparison of 45 variants calculations by both methods is shown.  

scholarly journals Determination of Individual Mesio-distal Sizes of Front Teeth Upper and Lower Jaw

Helix ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 5139-5143
Author(s):  
Olga P. Ivanova ◽  
Sergey V. Chernenko ◽  
Maria V. Vologina ◽  
Viktor I. Shemonaev ◽  
Elena A. Ogonyan
Keyword(s):  
Lower Jaw

scholarly journals Sex determination of the Bosnian-Herzegovinian population based on odontometric characteristics of permanent lower canines

2013 ◽  
Vol 3 (2) ◽  
pp. 164-169
Author(s):  
Belma Muhamedagić ◽  
Nermin Sarajlić
Keyword(s):  
Sex Determination ◽  
Population Based ◽  
Skeletal Remains ◽  
Mass Graves ◽  
Lower Jaw ◽  
Healthy State ◽  
Mandibular Canine ◽  
The Right

Introduction: Sex determination is one of fi rst and most important steps in identifying disintegrated bodies and skeletal remains. During the exhumation of bodies from the mass graves and archaeologicalexcavations, it is quite often the case that not all bones of one person are found, therefore, teeth and the scull are the only true identifi cation material. Canines are teeth most appropriate for sex determination.The aim of the research was to determine sex identity of the Bosnian-Herzegovinian population based on odontometric characteristics of permanent lower canines.Methods: The research sample included 180 patients of the Dental Offi ce, of both sexes. All patients with permanent lower right and left canines, without caries, with healthy state of gingiva and periodontium,without crown restorations were included in the research. Measurement was done directly in the patients' mouth using a digital sliding caliper. Greatest mesiodistal width of the lower right and left canine and intercuspal distance of the lower jaw were measured.Results: All parameters were higher in case of male, including Mandibular Canine Index (MCI) (p<0.01). The precision of appraising the sex identity for the Bosnian-Herzegovinian population, based on MCI on the right, amounts 68.89% and 68.54% on the left.Conclusions: The study showed that right canines are signifi cantly broader than the left ones and they are broader in case of males. Lower right canines, that is, MCI on the right, indicates greater accuracy insex determination in relation to left lower canines. The accuracy in sex determination for all variables is higher for the female.

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