scholarly journals The Method of Diagnosis and Systematization Defects of Dental Hard Tissues

2018 ◽  
Vol 25 (4) ◽  
Author(s):  
Oleksandr Bulbuk ◽  
Olena Bulbuk ◽  
Mykola Rozhko
Keyword(s):  
Dental Treatment ◽  
Selection Criterion ◽  
Tooth Decay ◽  
Therapeutic Approaches ◽  
Hard Tissue ◽  
Dental Tissues ◽  
Precise Estimation ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Tissue Defects

In the problem of solving diagnosis and treatment of hard tissue defects, a significant role is played by the choice of tactics for dental treatment of tooth decay. This work was aimed at studying the problem of diagnosis and systematization of hard tissues defects, that will contribute to the objectification of diagnostic and therapeutic approaches in dental treatment of patients with this disease. The objective of the research was to develop an anatomical and functional systematization for differentiated evaluation of tooth defects, as a basis for the application of differentiated diagnostic and therapeutic approaches to dental treatment of hard tissue defects. Materials and methods. For differential assessment of the extent of tooth defects and precise estimation of the strength of the composition “tooth-restoration”, we conducted   mechanical and mathematical modeling of contact interaction of restoration with dental tissues. We conducted anthropometric studies of all types of cavities of different groups of teeth as well.  Results. As a result of the study, there was proposed the systematization of hard tissues defects – location of defects, occlusive load, extent of defects/ depth of decay. The algorithm for choosing the method of treating hard tissues defects that is based on the systematization of location of defects, occlusive load, extent of defects/ depth of decay and may serve as a selection criterion for the treatment of such pathologies was offered. Conclusions. The proposed systematization filled the obvious gap in academic ideas of hard tissue defects, suggested the prospect of reaching a consensus on differentiated diagnostic and therapeutic approaches in treatment of patients with this disease building the methodological “bridge of continuity” between therapeutic and orthopedic dentistry in the field of hard tissue defect treatment.

scholarly journals The method of diagnosis and classification of the gingival line defects of the teeth hard tissues

2017 ◽  
Vol 24 (2) ◽  
Author(s):  
Olena Bulbuk ◽  
Mykola Rozhko ◽  
Oleksandr Bulbuk
Keyword(s):  
Dental Treatment ◽  
Therapeutic Approaches ◽  
Hard Tissue ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Diagnosis And Classification ◽  
Clinical Variants ◽  
Line Defects ◽  
Tissue Defects

For solving the problem of diagnosis and treatment of hard tissue defects the significant role belongs to the choice of tactics for dental treatment of hard tissue defects located in the gingival line of any tooth.This work aims to study the problems of diagnosis and classification of gingival line defects of the teeth hard tissues. That will contribute to the objectification of differentiated diagnostic and therapeutic approaches in the dental treatment of various clinical variants of these defects localization.The objective of the study – is to develop the anatomical-functional classification for differentiated estimation of hard tissue defects in the gingival part, as the basis for the application of differential diagnostic-therapeutic approaches to the dental treatment of hard tissue defects disposed in the gingival part of any tooth.Materials and methods of investigation: There was conducted the examination of 48 patients with hard tissue defects located in the gingival part of any tooth. To assess the magnitude of gingival line destruction the periodontal probe and X-ray examination were used.Results. The result of the performed research the classification of the gingival line defects of the hard tissues was offered using exponent power. The value of this indicator is equal to an integer number expressed in millimeters of distance from the epithelial attachment to the cavity’s bottom of defect.Conclusions. The proposed classification fills an obvious gap in academic representations about hard tissue defects located in the gingival part of any tooth. Also it offers the prospects of consensus on differentiated diagnostic-therapeutic approaches in different clinical variants of location.  This classification builds methodological “bridge of continuity” between therapeutic and prosthetic dentistry in the field of treatment of the gingival line defects of dental hard tissues.

Primary Teeth and Hair as Indicators of Environmental Pollution

2016 ◽  
Vol 40 (2) ◽  
pp. 152-155 ◽  
Author(s):  
TE Shishniashvili ◽  
NN Suladze ◽  
VV Margvelashvili
Keyword(s):  
Environmental Pollution ◽  
Toxic Elements ◽  
Chemical Elements ◽  
Epidemiological Survey ◽  
Essential Elements ◽  
World Health ◽  
Dental Tissues ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Health Organization

Objectives: To study the influence of environmental pollution on the mineralization of dental hard tissues by using biosubstrates: teeth and hair. :Study design: At the first stage epidemiological survey was conducted in polluted and less polluted areas of Tbilisi (Georgia). We studied 525 children aged 3 and 4 years. Caries prevalence and intensity was defined by the methodology of World Health Organization. At the second stage the chemical elements content was studied in hair and teeth hard tissues of 24 children by X - ray fluorescent spectroscopy method. Results: The prevalence of dental caries in the polluted region was 46%, caries intensity − 1.92 (± 2.842). In the less polluted region prevalence was 37%, caries intensity − 1.47 (± 2.571). These data are statistically reliable (p < 0.05). The study of hair and tooth tissues showed that the toxic elements (Pb, Hg, Sn, Ti) content in these tissues was higher in environmentally unfavorable than in favorable conditions. Conclusion: Hair and dental tissues can be used as indicators of environmental pollution. Our survey showed that toxic elements content in dental hard tissues was higher and the level of essential elements was less in polluted than in less polluted areas of Tbilisi.

scholarly journals In Vitro Assessment of Erosive Effects of Some Common Soft Drinks on Dental Hard Tissues

2019 ◽  
Vol 23 (3) ◽  
pp. 132-140
Author(s):  
Enea Bitri ◽  
Lucian Petcu ◽  
Gabriela Mocanu ◽  
Doina Paula Balaban
Keyword(s):  
Weight Loss ◽  
Titratable Acidity ◽  
Soft Drinks ◽  
Hard Tissue ◽  
Time Exposure ◽  
Prolonged Time ◽  
Dental Hard Tissue ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Erosive Effect

Summary Background/Aim: The chemical nature of soft drinks is acidic, so they possess the capacity to cause hard tissue erosion. The aim of this study is to assess the potentially erosive effect linked to pH and titratable acidity of some common soft drinks on dental hard tissues in prolonged time exposure. Material and Methods: Seven types of soft drinks in Romanian market were selected for this study. The pH and Titratable acidity were determined. Twenty one human dental hard tissue specimens were immersed in 5 ml solution each for 336h. Every 48h weight loss was determined for each specimen and after 336h volume changes were calculated. Enamel microhardness was determined using a Microhardness Tester model HV-1000 and compared to normal enamel microhardness. Results: The pH values of beverages ranged from 2.37 to 3.1, showing no significant differences. All specimens presented color and surface texture modifications, weight loss and volume reduction. There were found significant differences between the mean values of weight loss and enamel microhardness of each type of specimens and type of beverages tested. The most representative findings were achieved by indentations done in specific zones on Sprite® immersed specimen. This result suggest that microhardness near the eroded surface was significant lower than in other zones. Conclusions: Data obtained have shown that all the soft drinks tested had an erosive effect, causing dental hard tissue dissolution. For prolonged time exposure titratable acidity may be a major predictor for erosive potential. Dental erosion may affect different levels of enamel causing decreased enamel microhardness.

scholarly journals Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

2019 ◽  
Vol 21 (6) ◽  
pp. 1003-1019 ◽  
Author(s):  
Simone Mastrogiacomo ◽  
Weiqiang Dou ◽  
John A. Jansen ◽  
X. Frank Walboomers
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Resonance Imaging ◽  
Hard Tissue ◽  
Comprehensive Overview ◽  
Ultrashort Echo Time ◽  
Dental Tissues ◽  
Hard Tissues ◽  
Echo Time

Abstract Magnetic resonance imaging (MRI) is a non-invasive diagnostic imaging tool based on the detection of protons into the tissues. This imaging technique is remarkable because of high spatial resolution, strong soft tissue contrast and specificity, and good depth penetration. However, MR imaging of hard tissues, such as bone and teeth, remains challenging due to low proton content in such tissues as well as to very short transverse relaxation times (T2). To overcome these issues, new MRI techniques, such as sweep imaging with Fourier transformation (SWIFT), ultrashort echo time (UTE) imaging, and zero echo time (ZTE) imaging, have been developed for hard tissues imaging with promising results reported. Within this article, MRI techniques developed for the detection of hard tissues, such as bone and dental tissues, have been reviewed. The main goal was thus to give a comprehensive overview on the corresponding (pre-) clinical applications and on the potential future directions with such techniques applied. In addition, a section dedicated to MR imaging of novel biomaterials developed for hard tissue applications was given as well.

Phosphohydrolase Activities in Developing and Mature Dental Tissues

1990 ◽  
Vol 45 (3-4) ◽  
pp. 280-292
Author(s):  
Edda Warth ◽  
Reinhard Jeck
Keyword(s):  
Alkaline Phosphatase ◽  
Root Formation ◽  
Specific Activity ◽  
Tooth Development ◽  
Inorganic Pyrophosphatase ◽  
Dental Tissues ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Enamel Epithelium ◽  
Enamel Mineralization

Abstract In the course of the odontogenesis of bovine incisors several clearly distinguishable phosphohydrolase activities are observed in the pulp and in dental hard tissues. Using various substrates and inhibitors, unspecific alkaline phosphatase, two isoenzymes of acid phosphatase, Ca2+-activated ATPase and inorganic pyrophosphatase are characterized. The enzymatic activity of alkaline phosphatase in pulp and hard tissues is significantly high at the beginning of dentine and enamel mineralization. The specific activity of this enzyme decreases quite fast with the beginning of root formation, then more slowly, until it reaches a constant final value. Histochemical studies show that during mineralization the maximum of alkaline phosphatase activity is in the subodontoblasts. Lower enzyme concentrations are found in the stratum intermedium and in the outer enamel epithelium during that process. The specific activities of ATPase, acid phosphatases and pyrophosphatase show little temporal variation during tooth development, but they also appear in a characteristic spatial pattern in the dental tissues.

Formation of Acellular Root Cementum in to Dental and Non-dental Hard Tissues in the Rat

1990 ◽  
Vol 69 (10) ◽  
pp. 1669-1673 ◽  
Author(s):  
W. Beertsen ◽  
V. Everts
Keyword(s):  
Periodontal Ligament ◽  
Alveolar Bone ◽  
Periodontal Ligament Fibroblasts ◽  
Dental Tissues ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Hard Dental Tissues

After the periodontium of the rat was wounded, the formation of acellular extrinsic fiber cementum (AEFC) did not appear to be restricted to the hard dental tissues (pre-existing cementum, dentin, and enamel). Layers resembling AEFC were also deposited along the inner wall of the alveolar bone. At the time of observation (six weeks after being wounded), cells other than fibroblast-like cells could not be distinguished close to the newly formed AEFC-like layers. We suggest that the deposition of this material was related to the activity of periodontal ligament fibroblasts.

scholarly journals Quantification of Bacterial Colonization in Dental Hard Tissues Using Optimized Molecular Biological Methods

2020 ◽  
Vol 11 ◽  
Author(s):  
Torsten Sterzenbach ◽  
Anne Pioch ◽  
Martin Dannemann ◽  
Christian Hannig ◽  
Marie-Theres Weber
Keyword(s):  
Biofilm Formation ◽  
Bacterial Colonization ◽  
Hard Tissue ◽  
Bacterial Dna ◽  
Root Canals ◽  
Dental Hard Tissue ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Biological Methods

Bacterial infections of root canals and the surrounding dental hard tissue are still a challenge due to biofilm formation as well as the complex root canal anatomy. However, current methods for analyzing biofilm formation, bacterial colonization of root canals and dental hard tissue [e.g., scanning electron microscopy, confocal laser scanning microscopy (CLSM) or determination of colony forming units (CFU)] are time-consuming and only offer a selective qualitative or semi-quantitative analysis. The aim of the present study is the establishment of optimized molecular biological methods for DNA-isolation and quantification of bacterial colonization via quantitative PCR (qPCR) from dental hard tissue. Root canals of human premolars were colonized with Enterococcus faecalis. For isolation of DNA, teeth were then grinded with a cryo mill. Since the hard tissues dentin and especially enamel belong to the hardest materials in the human organism, the isolation of bacterial DNA from root dentin is very challenging. Therefore, treatment steps for the isolation of DNA from grinded teeth were systematically analyzed to allow improved recovery of bacterial DNA from dental hard tissues. Starting with the disintegration of the peptidoglycan-layer of bacterial cells, different lysozyme solutions were tested for efficacy. Furthermore, incubation times and concentrations of chelating agents such as EDTA were optimized. These solutions are crucial for the disintegration of teeth and hence improve the accessibility of bacterial DNA. The final step was the determination of prior bacterial colonization of each root canal as determined by qPCR and comparing the results to alternative methods such as CFU. As a result of this study, optimized procedures for bacterial DNA-isolation from teeth were established, which result in an increased recovery rate of bacterial DNA. This method allows a non-selective and straightforward procedure to quantify bacterial colonization from dental hard tissue. It can be easily adapted for other study types such as microbiome studies and for comparable tissues like bones.

The Influence of Er:YAG Laser on the Dissolution Rate and Morphology of the Root Cement A scanning electron microscopic study

2018 ◽  
Vol 69 (6) ◽  
pp. 1574-1577
Author(s):  
Monica Monea ◽  
Daniela Esian ◽  
Reka Soos ◽  
Adrian Tohati ◽  
Alexandru Sitaru ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Electron Microscopic ◽  
Morphological Alterations ◽  
Dental Tissues ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Root Planning ◽  
Scaling And Root Planning ◽  
Scanning Electron

Lasers can interact with dental tissues inducing changes in tooth characteristics, regarding the surface morphology and elemental composition. The alterations were observed in Calcium, Phosphorus, Sodium, Oxygen and Carbon elements, which influence the resistance and chemical properties of dental hard tissues. The thermal energy used by laser reduces water content of the tissues and as a consequence, the level of oxygen composition decreases after irradiation. Numerous studies had demonstrated its ability to ablate hard-tissues, without any detrimental thermal effects such as cracking or melting for the adjacent tissues. The aim of this article is to present the in vitro effects of Er:YAG laser in comparison with sonic, ultrasonic and manual instruments on the root cement during scaling and root planning, evaluated by scanning electron microscope. The study was conducted on extracted teeth, divided in four groups according to the method used for scaling and root planning. The specimens were analyzed by scanning electron microscopy and the morphological alterations of the cement were evaluated based on a scoring system. Data were statistically analyzed using Mann-Whitney test and the level of significance was set at p[0.05.We noted unfavorable results on the root cement after using Er:YAG laser as craters and cracks induced by heat. There was a greater amount of roughness on the root surface after Er:YAG was used for scaling and root planning compared to manual, sonic and ultrasonic methods. Despite favorable results obtained after the use of Er:YAG laser during periodontal treatment, further clinical studies are necessary in order to determine in which moment of the therapy these methods are most suitable.

scholarly journals COMPUTER TECHNOLOGIES FOR DETERMINING INDEX ASSESSMENT OF THE DESTRUCTION OF DENTAL HARD TISSUES

2021 ◽  
Vol 8 (3) ◽  
pp. 188-193
Author(s):  
I.V. Yanishen ◽  
S.A. German ◽  
Z.A. Al-Saedi
Keyword(s):  
Computer Software ◽  
Clinical Situation ◽  
Orthopedic Treatment ◽  
Subjective Data ◽  
Dental Tissues ◽  
Indications For Treatment ◽  
Dental Hard Tissues ◽  
Hard Dental Tissues ◽  
Natural Tissue ◽  
Tissue Defects

The aim of the study was to compare the obtained data of hard dental tissues destruction indices with the corresponding indications for the choice of the method of treatment by means of mathematical analysis. Materials & methods. 120 patients aged 20 to 55 were examined and 358 teeth hard tissue defects were identified in them. The data of indices was obtained and compared with the indications for orthopedic treatment according two indices in the same clinical situation. Results. The study showed that the indices had different meanings and different indications for treatment in the same situations. Such discrepancies in indications for treatment indicate the subjective data of one of the indices, which does not take into account the depth of destruction and the volume of the remaining natural tissue of the teeth. Comparison of these indices showed different figures in the same clinical situation, identifying corresponding incorrect indications for the choice of the design of the first investigated index, as well as more accurate data of the proposed index. Conclusion. The index assessment of hard dental tissues destruction serves as the main guideline for the dentist when choosing a method for tooth restoration, and can be calculated using photographs, scans and computer software.

Sign in / Sign up

Export Citation Format

Share Document