scholarly journals Human Remains Identification Using Micro-CT, Spectroscopic and A.I. Methods in Forensic Experimental Reconstruction of Dental Patterns After Concentrated Acid Significant Impact

2022 ◽  
Author(s):  
Andrej Thurzo ◽  
Viera Jančovičová ◽  
Miroslav Hain ◽  
Milan Thurzo ◽  
Bohuslav Novák ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Computed Tomography ◽  
Sulfuric Acid ◽  
3D Reconstruction ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Human Remains ◽  
Glass Ionomer ◽  
Dental Patterns ◽  
Ionomer Cement

(1) Human teeth are the most resilient tissues in the body. However, exposure to concentrated acids might lead to their obliteration, thus making human identification difficult. Teeth often contain dental restorations from materials that are even more resilient to acid impact. This paper introduces novel method of 3D reconstruction of dental patterns as a crucial step for digital identification with dental records.; (2) With combination of modern methods of Micro-Computed Tomography, Cone Beam Computed Tomography, Attenuated Total Reflection in conjunction with Fourier-Transform Infrared Spectroscopy and Artificial Intelligence Convolutional Neural Network algorithms, the paper presents the way of 3D dental pattern reconstruction and human remains identification. Research studies morphology of teeth, bone and dental materials (Amalgam, Composite, Glass-ionomer cement) under different periods of exposure to 75% sulfuric acid; (3) Results reveal significant volume loss in bone, enamel, dentine and as well glass-ionomer cement. Results also reveal significant resistance of composite and amalgam dental materials to sulfuric acid impact, thus serving as strong parts in the dental pattern mosaic. Paper also introduces probably first successful artificial intelligence application in automated forensic CBCT segmentation.; (4) Interdisciplinary cooperation utilizing mentioned technologies can solve problem of human remains identification with 3D reconstruction of dental patterns and their 2D projections over existing ante-mortem records.

scholarly journals Effects of ionizing radiation on surface properties of current restorative dental materials

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
Débora Michelle Gonçalves de Amorim ◽  
Aretha Heitor Veríssimo ◽  
Anne Kaline Claudino Ribeiro ◽  
Rodrigo Othávio de Assunção e Souza ◽  
Isauremi Vieira de Assunção ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Surface Properties ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Contact Angles ◽  
Glass Ionomer ◽  
Post Radiation ◽  
Restorative Dental Materials ◽  
Ionomer Cement

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

scholarly journals Apexogenesis of traumatized maxillary right central incisor: Case report with 4years follow up

2019 ◽  
Vol 7 (1) ◽  
pp. 8
Author(s):  
Mohammad Hammo DDS ◽  
Mazen Doumani DDS. MSc. ◽  
Adnan Habib DDS. MSc. PhD
Keyword(s):  
Composite Resin ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Permanent Teeth ◽  
Glass Ionomer ◽  
Central Incisor ◽  
Vital Pulp Therapy ◽  
Open Apices ◽  
Ionomer Cement

The main goal of vital pulp therapy is to preserve and maintain pulpal health in teeth that have been exposed to caries, trauma, and restorative procedures. This type of endodontic treatment is very important in young permanent teeth that have not reached their complete length and exhibit thin-walled roots and wide open apices. The developments in knowledge of pulpal physiology and immunology, beside to newly introduced dental materials, have changed the treatment approaches for teeth with involved pulps. This report describes a case of a young patient in whom maxillary right central incisor suffered crown fractures because of a traumatic accident. Pulpotomy with MTA were performed in order to achieve apexogenesis and the tooth was restored with a glass ionomer cement and composite resin. The patient was reviewed over 4years. 

scholarly journals Mechanical Properties Enhancement of Conventional Glass Ionomer Cement by Adding Zirconium Oxide Micro and Nanoparticles

2019 ◽  
Vol 25 (2) ◽  
pp. 72-81 ◽  
Author(s):  
Ali N. Alobiedy ◽  
Ali H. Alhille ◽  
Ahmed R. Al-Hamaoy
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Wear Rate ◽  
Zirconium Oxide ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Nano Particles ◽  
Glass Ionomer ◽  
Biaxial Flexural Strength ◽  
Ionomer Cement

The aim of this work is to enhance the mechanical properties of the glass ionomer cement GIC (dental materials) by adding Zirconium Oxide ZrO2 in both micro and nano particles. GIC were mixed with (3, 5 and 7) wt% of both ZrO2 micro and nanoparticles separately. Compressive strength (CS), biaxial flexural strength (BFS), Vickers Microhardness (VH) and wear rate losses (WR) were investigated. The maximum compression strength was 122.31 MPa with 5 wt. % ZrO2 micro particle, while 3wt% nanoparticles give highest Microhardness and biaxial flexural strength of 88.8 VHN and 35.79 MPa respectively. The minimum wear rate losses were 3.776µg/m with 7 wt. % ZrO2 nanoparticle. GIC-containing ZrO2 micro and nanoparticles is a promising restorative material with improved mechanical properties expect wear rate losses.  

scholarly journals Use of glass ionomer cement containing antibiotics to seal off infected dentin: a randomized clinical trial

2013 ◽  
Vol 24 (1) ◽  
pp. 68-73 ◽  
Author(s):  
Jainara Maria Soares Ferreira ◽  
Sérgio Luiz Pinheiro ◽  
Fábio Correia Sampaio ◽  
Valdenice Aparecida de Menezes
Keyword(s):  
Clinical Trial ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Deciduous Teeth ◽  
Controlled Clinical Trial ◽  
Glass Ionomer ◽  
Double Blind ◽  
Significance Level ◽  
Ionomer Cement

Dental materials with antibacterial properties can prevent the harmful effects caused by oral cariogenic bacteria. This double-blind controlled clinical trial evaluated the performance of a glass ionomer cement (GIC) added with antibiotics for sealing infected dentin in atraumatic restorations of primary molars. The study enrolled 45 children (45 teeth) between 5 and 8 years of age, of both genders, divided into two groups: GC (n=22), where cavities were lined with a conventional GIC (Vidrion F) and GA (n=23), with cavities lined with Vidrion F added with 1% each of metronidazole, ciprofloxacin and cefaclor antibiotic. Both groups were restored with Ketac Molar Easymix. Molars with carious lesions on the inner half of dentin without clinical or radiographic pulp damage were selected. Patients were evaluated clinically (pain, fistulas or mobility) and radiographically (area of caries, periapical region and furcation) after 1, 3, 6 and 12 months. For statistical analysis, chi-squared or Fisher's exact tests were used with a 5% significance level. GA (82.6-95.7%) had better results than GC (12.5-36.4%) in all evaluations (p<0.05) and the difference in the success rate was 46.2-72.5% higher for GA. The use of the antibiotic-containing GIC liner on infected dentin proved satisfactory when applied in deciduous teeth.

scholarly journals Commercially Available Fluoride-Releasing Restorative Materials: A Review and a Proposal for Classification

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2313
Author(s):  
Philippe Francois ◽  
Vincent Fouquet ◽  
Jean-Pierre Attal ◽  
Elisabeth Dursun
Keyword(s):  
Smart Materials ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ion Release ◽  
Comprehensive Review ◽  
Family Names ◽  
Restorative Materials ◽  
Ionomer Cement

Resin composite and glass ionomer cement (GIC) are the most commonly used dental materials to perform direct restorations. Both have specific characteristics that explain their popularity and their limits. More than 20 years ago, the first attempt (followed by others) to combine the advantages of these two families was performed with compomers, but it was not very successful. Recently, new formulations (also called ‘smart materials’) with claimed ion release properties have been proposed under different family names, but there are few studies on them and explanations of their chemistries. This comprehensive review aims to gather the compositions; the setting reactions; the mechanical, self-adhesive, and potential bulk-fill properties; and the ion release abilities of the large existing families of fluoride-releasing restorative materials and the new restorative materials to precisely describe their characteristics, their eventual bioactivities, and classify them for an improved understanding of these materials. Based on this work, the whole GIC family, including resin-modified and highly viscous formulations, was found to be bioactive. Cention N (Ivoclar Vivadent, AG, Schaan, Lietschentein) is the first commercially available bioactive resin composite.

The Effect of Hydroxyapatite on Bonding Strength in Light Curing Glass Ionomer Dental Cement

2006 ◽  
Vol 309-311 ◽  
pp. 881-884 ◽  
Author(s):  
M.H. Chae ◽  
Yong Keun Lee ◽  
Kyoung Nam Kim ◽  
Jae Hoon Lee ◽  
B.J. Choi ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Physical Properties ◽  
Bonding Strength ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Ambient Light ◽  
Glass Ionomer ◽  
Depth Of Cure ◽  
Light Curing ◽  
Ionomer Cement

The mineral phase of bone and teeth is mainly hydroxyapatite. Currently there are numerous researches being conducted on the effect of the addition of hydroxyapatite to dental materials. Among them, several studied were published stating that the addition of hydroxyapatite to composite resin or glass ionomer cement resulted in an improvement in bonding strength and physical properties Therefore, this study will investigate the effect that the addition of hydroxyapatite to light curing glass ionomer cement has on bonding strength. Two different light curing glass ionomer cement products were selected (FujiⅡLC, GC Cor, Japan and Vitremer™ , 3M/ESPE, USA) and hydroxyapatite was mixed into the light curing glass ionomer cement at various concentrations to create hydroxyapatite-light curing glass ionomer cement mixture. In order to confirm that hydroxyapatite-light curing glass ionomer cement met the basic requirements of dental materials, sensitivity to ambient light, depth of cure, and flexural strength were tested. From the results of the above mentioned tests, the hydroxyapatite-light curing glass ionomer cement with the most superior physical properties for each product (15% HA-Fuji Ⅱ LC, 20% HA-Vitremer™)was bonded to the teeth and then immersed in artificial saliva(36.5°C) for four weeks. Finally the sectioned surface was observed under SEM after measuring the bonding strength. As the hydroxyapatite concentration increased, the depth of cure decreased. However flexural strength increased and there was not much change in the sensitivity to ambient light. Bonding strength, which was the main focus of this study, increased with the addition of hydroxyapatie and scanning electron microscope findings show a more cohesive type of fracture in the material with bone like apatite material formation along the tooth-material interface.

scholarly journals Efficacy of dental materials in terms of apparent mineral density restoration: composite resin, glass ionomer cement and infiltrant

2021 ◽  
pp. 100192
Author(s):  
Evgeniy V. Sadyrin ◽  
Diana V. Yogina ◽  
Michael V. Swain ◽  
Stanislav Yu. Maksyukov ◽  
Andrey S. Vasiliev
Keyword(s):  
Composite Resin ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Mineral Density ◽  
Ionomer Cement

Рarameters of spontaneous activation of basophils on dental materials with allergic rhinitis patients

2020 ◽  
Vol 25 (2) ◽  
pp. 148-151
Author(s):  
V. A. Kozlov ◽  
E. A. Satygo ◽  
S. G. Shakhaev
Keyword(s):  
Allergic Rhinitis ◽  
Zirconium Dioxide ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Chromium Alloy ◽  
Glass Ionomer ◽  
Nasal Breathing ◽  
Light Curing ◽  
Spontaneous Activation ◽  
Ionomer Cement

Relevance. Тhe quality of dental care is greatly influenced by the biocompatibility of the materials used. This problem is particularly acute in patients with a high level of sensitization, such as allergic rhinitis. Currently, the CAST-test is used to diagnose allergies and sensitization of the body. The method has 100% specificity and significantly complements the definition of IgE antibodies.Purpose. To determine the individual tolerance of dental materials in patients with allergic rhinitis.Materials and methods. 47 patients with allergic rhinitis were examined. All patients were sent to determine the test of spontaneous activation of peripheral blood basophils on dental materials: cobalt-chromium alloy; zirconium dioxide; glass ionomer cement; composite material; plastic for the basis of the prosthesis (non-monomer).Results. The Average values of the activation coefficient of blood basophils in patients with nasal breathing disorders were revealed for a kobolto-chrome alloy – 1.29 ± 0.02, for zirconium dioxide – 1.04 ± 0.02, for glass ionomer cement – 1.11 ± 0.04, for composite dental light – curing material – 1.24 ± 0.03, for plastic for prostheses (non-monomer) – 1.19 ± 0.02.Conclusion. The study shows the need for special attention to the planning of dental treatment in patients with nasal breathing difficulties, especially with allergic rhinitis. The frequency of detection of the coefficient of spontaneous activation of basophils test showed a 100% positive result for composite light-curing material and non-motionless plastic, in 91.5% of cases-for a cobolto chrome alloy. 100% negative result for zirconium diaxide and 82.9% of cases for glass ionomer cement.

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