scholarly journals A DIFFERENTIATED APPROACH TO THE DIAGNOSIS OF OCCLUSIVE DISORDERS AT THE STAGES OF FUNCTIONAL EXAMINATION OF THE CHEWING APPARATUS

2021 ◽  
Vol 17 (3) ◽  
pp. 132-138
Author(s):  
Diana Khasanova ◽  
Sergey Averianov ◽  
Marina Galiullina ◽  
Rinat Yunusov ◽  
Fanya Hachatryan
Keyword(s):  
Young Patients ◽  
Masticatory Muscles ◽  
Complex Action ◽  
Health Card ◽  
System A ◽  
Lower Jaw ◽  
Occlusal Surfaces ◽  
Diagnostic Models ◽  
The Difference ◽  
Functional Examination

Occlusion is a harmonious interaction of the dental system in dynamics, ending with the contact of teeth in conditions of their normal or disturbed ratio. This is a complex action involving teeth, masticatory muscles, TMJ. Occlusive disorders are a reflection of the external manifestations of pathological processes of the dental system. There is no doubt that in the search for etiological factors of occlusion disorders, the problem will manifest itself in one of the parts of the chewing system. The aim of the study was to optimize the early diagnosis of occlusive disorders in young patients without violating the integrity of the dentition. Materials and methods. The study included 36 patients without a violation of the integrity of the dentition aged 18 to 25 years (15 men, 21 women), who did not complain of pain in the dental system. A comprehensive dental examination was carried out and an individual "questionnaire and patient's health card" was filled out. Computer analysis with the T-Scan III occlusiography system of the company Tekscan (USA) was used to register the nature of the closing of the dentition, the study of diagnostic models in the PROTAR evo 7 KAVO articulator, as well as the study of the registration of the difference in the biopotentials of the masticatory and temporal muscles proper in patients in the phase of relative physiological rest and with maximum jaw compression using a four-channel electromyograph Synapsis NMF Neurotech (Russia). The results showed that the prevalence of occlusive disorders in the study group is 83.3%. The abnormal position of the teeth in the dentition in combination with malocclusion anomalies, non-physiological relief of the occlusal surfaces of the teeth formed due to various factors which cause the appearance of premature contacts. This prevents the harmonious sliding movements of the lower jaw and is accompanied by articulatory changes in the entire chewing system.

scholarly journals Generational Differences in Support and Care of Individuals Diagnosed With Severe Mental Illness

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 94-94
Author(s):  
Deborah Finkel ◽  
Per Bulöw ◽  
Pia Bulöw ◽  
Monika Wilińska ◽  
Cristina Joy Torgé ◽  
...  
Keyword(s):  
Social Support ◽  
Mental Illness ◽  
Severe Mental Illness ◽  
Social Services ◽  
Generational Differences ◽  
System A ◽  
Care Systems ◽  
The Difference ◽  
Changes Over Time ◽  
Age Range

Abstract As part of the process of de-institutionalizing the Swedish mental health care system, a reform was implemented in 1995 moving responsibility for social support for people with severe mental illness (SMI) from the county to social services in the municipalities. In many ways, older people with SMI were neglected in this changing landscape of psychiatric care. To investigate possible generational differences in support experiences, two nonoverlapping cohorts were created from surveys conducted every fifth year between 1996 and 2011 in one middle-sized municipality in the south of Sweden, aiming to detect the needs for social support. Cohort 1 includes everyone detected at the 1996 survey aged 65 and 79 years (N = 92). Cohort 2 includes individuals first detected at the 2011 survey who were aged 65 to 79 (N = 104). Results indicates significant differences between the two cohorts in diagnosis, reflecting changes over time in diagnostic tendencies. Cohort 1 was on average 10 years older than Cohort 2, even within the restricted age range. After correcting for age, there were no differences between the two cohorts in education, functioning (CAN and GAF), or marital status. Although Cohort 1 experienced more days of institutionalization than Cohort 2 (median = 424.5 days vs. 382 days), the difference was not statistically significant. Cohort 2 had significantly higher additional subsidies and disposable income, as well as significantly higher income from other sources after retirement. Results indicate the changing demands that older adults with SMI will place on care systems.

scholarly journals A Clinical Study of Toxication Caused by Carbamazepine Abuse in Adolescents

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Xu ◽  
Yu-Lin Chen ◽  
Ying Zhao ◽  
Li-Jie Wang ◽  
Jiu-Jun Li ◽  
...  
Keyword(s):  
School Performance ◽  
Young Patients ◽  
Median Dose ◽  
Toxic Dose ◽  
Adolescent Population ◽  
Urban Rural ◽  
The Difference ◽  
Abuse Treatment ◽  
First Time ◽  
At Risk Adolescents

Carbamazepine is known to produce the side effect of euphoria. As such, it lends itself to being a drug of abuse, particularly in the adolescent population. This retrospective study evaluated carbamazepine abuse, treatment course, and associated morbidity in Chinese adolescents. The median dose of carbamazepine resulting in overdose was 2,000 mg (800–5,000). Patients were largely from urban-rural fringe areas (76.47%, 52.94%) with school performance within the last 1/3 range and (52.94%) unsupervised by parents. 35.29% experienced an obvious sense of euphoria. All patients had nervous system symptoms, 6 (35.29%) cases developed coma (GCS < 8), and 5 (29.41%) cases experienced convulsion. Four cases were treated with hemodialysis. The incidence rate in young patients with repeat carbamazepine use and without the supervision of parents was higher than that in first-time users (5/7 versus 4/10), but the difference was not significant. The toxic dose of repeat users was 3428 ± 1035 mg, significantly higher than that of 1470 ± 646 mg in first-time users (P=0.001). Carbamazepine can produce a sense of euphoria, which is more likely to lead to its abuse and overdose in adolescents. To prevent carbamazepine abuse and overdose will be critical in educating at-risk adolescents and preventing associated morbidities in the future.

scholarly journals ANALYSIS OF THE DYNAMICS OF FUNCTIONAL OCCLUSION INDICATORS IN THE CONSTRUCTION OF OCCLUSION SURFACES OF ORTHOPEDIC STRUCTURES

2020 ◽  
Vol 73 (12) ◽  
pp. 2651-2656
Author(s):  
Svitlana P. Yarova ◽  
Sergii O. Turchenenko ◽  
Iryna M. Tkachenko ◽  
Yuriy Yu. Yarov
Keyword(s):  
Functional Condition ◽  
Masticatory Muscles ◽  
Main Group ◽  
Suggested Method ◽  
Control Group ◽  
Orthopedic Treatment ◽  
Functional Parameters ◽  
Occlusal Surfaces ◽  
Left And Right ◽  
And Control

The aim: Is to evaluate the effectiveness of the proposed method of constructing occlusal surfaces of orthopedic structures by monitoring the dynamics of functional indicators of occlusion and the functional condition of the masticatory muscles. Materials and methods: The object of the study was made up by 64 patients with included defects of the dentition of the 3rd class according to Kennedy. Patients were divided into two equal groups – the main group (patients were treated by using the suggested method of construction of occlusal surfaces of orthopedic structures) and control (dentition defects were replaced according to the traditional protocol). Results: The results of evaluating the effectiveness of the proposed method showed that the index of symmetry of the anterior bundles of the temporal muscles dropped by 18.5%, the index of symmetry of the masticatory muscles reduced by 22%, the torque of the mandible reduced by 32%, the index of stabilizing occlusal – by 27%, relative efforts of balance disturbance for more than 10 % regarding the left and right reduced by a factor of 4.4, the rate of opening time was 1.5 times higher than before, the rate of time of opening of the jaws – 1.8 times. Conclusions: The use of the suggested method of orthopedic treatment with temporary structures leads to probable changes in the studied functional parameters in comparison with the control group (p <0,05).

scholarly journals IMPLANT TREATMENT IN PATIENTS WITH SEVERE TOOTH WEAR ON THE OCCLUSAL SURFACE

2021 ◽  
Vol 11 (2) ◽  
pp. 104-107
Author(s):  
Vladimir Tlustenko ◽  
Valentina Tlustenko ◽  
Sergey Komlev ◽  
Alexander Ivaschenko ◽  
Vladimir Koshelev
Keyword(s):  
Clinical Symptoms ◽  
Treatment Algorithm ◽  
Tooth Wear ◽  
Masticatory Muscles ◽  
Occlusal Surface ◽  
Lower Jaw ◽  
Instrumental Study ◽  
Asynchronous Operation ◽  
Stage 1 ◽  
Implant Treatment

Examination along with implant treatment was carried out in 21 patients with severe tooth wear on the occlusal surface. This disorder features a variety of clinical symptoms including changes in the facial features and the lower jaw movement amplitude, disturbed canine and incisor guidance, supercontacts, asynchronous operation of the masticatory muscles, etc. We have proposed a treatment algorithm aimed at eliminating these issues. The temporary non-removable dentures allowed creating occlusal marks (Stage 1) followed with their transfer onto permanent orthopedic structure (Stage 2) using implants. The complexity of the approach to treating this disease, as well as the effectiveness of our method has been confirmed by clinical data and the outcomes obtained through an instrumental study involving electromyography and electronic axiography. The extra additional research methods employed, such as electromyography and electronic axiography, allowed to assess the activity of masticatory muscles and the lower jaw articulation, thus to ensure occlusal-articulation interaction when restoring the lower facial height.

Signs of temporomandibular joint dysfunction in individuals with different dentition defects and unequal preservation of antagonist pairs of teeth

2021 ◽  
pp. 52-58
Author(s):  
I.S. Redinov ◽  
Ye.A. Pylaeva ◽  
O.O. Strakh ◽  
B.A. Lysenko
Keyword(s):  
Hearing Loss ◽  
Early Diagnosis ◽  
Temporomandibular Joint ◽  
Pathological Process ◽  
Orthopedic Treatment ◽  
Temporomandibular Joint Dysfunction ◽  
Significant Frequency ◽  
System A ◽  
Lower Jaw ◽  
Opening And Closing

As a result of examination and questionnaire of 143 patients who applied for orthopedic treatment of defects of teeth and dental rows, it was found that signs of dysfunction of temporomandibular joint with preserved dental rows are diagnosed in 36—55% cases, and with defects of dental rows — in 45—90% cases. The absence of eighth teeth in the dental row does not significantly change the functional state of the dental-jaw system. A statistically significant frequency of signs of EHS dysfunction has been identified among individuals having terminal dentition defects.In patients with terminal dentition defects, each 3rd patient is diagnosed with cochleovestibular syndrome, and in each 2nd, sounds are determined in the area of VNHS when the lower jaw moves. It has been found that if 15—13 and 12—11 pairs of antagonist teeth are preserved, the signs of dysfunction are determined in 55—45% cases, if the number of teeth having antagonists is reduced to 10—5 (in 90.0% these are patients with preserved 7—8 pairs of antagonist teeth), then the frequency of dysfunction signs increases to 75.0% (t1-3=1.33; t2-3=2.00), in such patients significantly more often — in 75.0% of cases, mandibular deviation is diagnosed when opening and closing the mouth than in persons with a large number of preserved antagonist teeth, respectively 55.0% (t=2.66) and 45.0% (t=3.93) in 1 and 2 groups. Thus, the identification of such signs as crunching, clicking in the joints, hearing loss or tinnitus, suggests the presence of intra-articular disorders in such patients. The deviation of the jaw from its main trajectory when opening the mouth indicates the possible involvement of the masticators muscles in the pathological process. All this requires the dentist to carry out early diagnosis and timely orthopedic treatment.

Bicarbonate-carbon dioxide buffer system: a determinant of the mitochondrial pH gradient

1984 ◽  
Vol 247 (3) ◽  
pp. F440-F446 ◽  
Author(s):  
D. P. Simpson ◽  
S. R. Hager
Keyword(s):  
Carbon Dioxide ◽  
Renal Cortex ◽  
Ph Gradient ◽  
Buffer System ◽  
Acid Base ◽  
Bicarbonate Buffer ◽  
Inner Membrane ◽  
System A ◽  
Intact Kidney ◽  
The Difference

The influence of the bicarbonate-carbon dioxide buffer system on the pH gradient (delta pH) across the inner membrane of mitochondria from rabbit renal cortex was studied with and without phosphate in the medium. delta pH with bicarbonate buffer or phosphate in the medium was greater at low than at high medium pH so that the difference (delta delta pH) between delta pH at pH 7.1 and at 7.6 was positive. Varying the concentration of phosphate from 0 to 10 mM had little effect on delta delta pH produced by bicarbonate buffer. Inhibition of the phosphate-hydroxyl carrier with N-ethylmaleimide abolished delta delta pH when phosphate was present in non-bicarbonate-containing media. With bicarbonate buffer present, N-ethylmaleimide increased delta delta pH. Similar effects were observed in mitochondria from liver and heart as well as from kidney. The effects of the bicarbonate buffer system on delta pH may result either from an inner membrane permeable to carbon dioxide but not to bicarbonate ion or from an active carrier for bicarbonate ion in the inner membrane. In intact kidney cells, the influence of the bicarbonate buffer system on delta pH may provide a mechanism for regulating substrate metabolism in response to acid-base changes. It may also serve in many organs to reduce fluctuations in matrix pH when alterations in cytoplasmic pH occur.

scholarly journals Quality of Life in Patients with Psoriasis Seen in the Department of Dermatology, Antananarivo, Madagascar

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Fandresena Arilala Sendrasoa ◽  
Naina Harinjara Razanakoto ◽  
Volatantely Ratovonjanahary ◽  
Onivola Raharolahy ◽  
Irina Mamisoa Ranaivo ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Negative Impact ◽  
Young Patients ◽  
The Body ◽  
University Hospital ◽  
Medical Decision ◽  
Cross Sectional ◽  
The Difference ◽  
The Impact

Background. Psoriasis is a chronic, inflammatory, and multifactorial dermatosis that impairs quality of life (QoL). Health-related QoL has become an important element in medical decision-making along with the effectiveness and the harmlessness of the treatments. Objective. To assess the impact of psoriasis in the QoL of patients with psoriasis by using the DLQI scales. Methods. A cross-sectional study from January to June 2018 was conducted in the Department of Dermatology of the University Hospital Joseph Raseta Befelatanana, Antananarivo, Madagascar, including patients more than 18 years old with mild to severe psoriasis. The severity of psoriasis was assessed using the “Psoriasis Area and Severity Index (PASI)”. QoL of patients with psoriasis was evaluated by using the DLQI scales. Results. 80 patients were included, their mean age was 36.5 years, and the male to female was 1.5 : 1. The mean DLQI score was 13.8. Symptoms, feelings, and psychic were the most altered dimensions. QoL was impaired in young patients, single, having medium level education. Even though patients with disease duration more than 5 years had higher DLQI score than other patients, the difference was not statistically significant (p=0.36). Furthermore, the clinical presentation of psoriasis did not influence the patient’s QoL (p=0.73). Patients with nail involvement had QoL impaired but the difference with another localization was not statistically significant (p=0.2). The quality of life was influenced by body area involved. The higher the body surface area involved, the more QoL is impaired (p=0.002). Furthermore, the higher the PASI, the more QoL is altered (p=0.002). Conclusion. Psoriasis has a negative impact in the quality of life in Malagasy patients with psoriasis, especially in younger and single patients. Worse quality of life is correlated to severity of psoriasis.

Noise Analysis and Filtering for Laser Active Imaging System

2013 ◽  
Vol 475-476 ◽  
pp. 282-286
Author(s):  
Tao Sun
Keyword(s):  
Imaging System ◽  
Noise Analysis ◽  
Speckle Noise ◽  
Recognition System ◽  
Denoising Method ◽  
Edge Information ◽  
System A ◽  
Active Imaging ◽  
The Difference ◽  
Contour Curvature

In order to deal with the contradiction between suppressing speckle noise and reserving details in laser active imaging recognition system, a denoising method based on contour curvature is proposed. Due to the contour curvature, the pixels in the image are divided into different classes, which contain different amount of information. The filter parameters are different for each class. Firstly, the origin image is smoothed using wavelet soft thresholding, then the contours are extracted by Morphological edge detection operator. Due to the difference of contour curvature, the pixels are labeled with point of strong signal, point of weak signal or point of no signal. Pixels with different labels are filtered by Lee filter of different step width. Experiment result indicates that compared with classical Lee filter, the proposed method performs better in filtering and keeping edge information.

Large Stroke Series Compliant Mechanism

2012 ◽  
Vol 490-495 ◽  
pp. 1104-1108 ◽  
Author(s):  
Ming Cai Shan ◽  
Wei Ming Wang ◽  
Shu Yuan Ma ◽  
Shuang Liu
Keyword(s):  
Theoretical Model ◽  
Maximum Stress ◽  
Compliant Mechanism ◽  
Critical Parameters ◽  
Element Analysis ◽  
Flexure Hinges ◽  
Body Model ◽  
System A ◽  
Rigid Body Model ◽  
The Difference

To increase the stroke of precision positioning system, a novel series compliant mechanism is presented which is based on elliptical flexure hinges. Pseudo-rigid-body model and energy method are applied to establish the theoretical model of stiffness and maximum stress, which are critical parameters for the large stroke compliant mechanism. The relationships are analyzed between geometric parameters of the series complaint mechanism, stiffness and maximum stress. According that, the series compliant mechanism is designed with the stroke more than 5mm and stiffness less than 3.2N/mm. The difference is less than 5% between the results of finite element analysis and theoretical model computation, which proves the correctness of the application design.

Methodology for Measurement of Density of Liquid Oxides

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Jan Hrbek ◽  
Bence Mészáros ◽  
Mykhaylo Paukov ◽  
Martin Kudláč
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Extreme Conditions ◽  
Nuclear Accidents ◽  
System A ◽  
Different Temperatures ◽  
Density Values ◽  
Properties Of Materials ◽  
The Difference

Abstract Measurement of physical properties of materials in extreme conditions, such as high temperature, is limited by technological challenges. Nevertheless, modeling of several phenomena relies on the existence of experimental data for their validation. In this study, a method suitable for determination of density in a liquid phase at high temperature is proposed and tested on Al2O3–ZrO2 system. A methodology for acquiring the temperature dependence of density for radioactive materials is proposed and is aimed to refine severe nuclear accidents modeling. The oxide was melted in an induction furnace with a cold crucible. The measurement was based on evaluation of the volume of the melt at different temperatures, in a range from 2100 to 2400 °C. The densities of the oxide in the solid-state and the skull-layer were measured using a pycnometer. A temperature dependence of the density was established and the results were compared with literature. The difference between existing data and the measured values in this work was less than 5%. Thus, the proposed methodology provides reliable density values in extreme conditions.

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