Journal articles: 'Chemistry in dentistry'

1

Bordina, Galina E., N. P. Lopina, A. V. Blinova, and D. A. Bordin. "THE DISCOLORING TEETH: THE CHEMISTRY OF THE EMERGENCE AND EFFECTIVE WHITENING." Russian Journal of Dentistry 22, no. 3 (June 15, 2018): 124–28. http://dx.doi.org/10.18821/1728-2802-2018-22-3-124-128.

Full text

Abstract:

In the article stated mechanism of formation organic and inorganic pigmentary complexes which changes color of teeth. Chemical aspects of dentistry procedure of whitening teeth are consider, original author's schemes of ion-changes and oxidative process are given, which happen with it. Knowledge of intermolecular interaction, which leads to the appearance of coloration and proceeding in process of his removal, will allow to develop new treatment methods and to improve existing, which apply in an esthetic dentistry.

APA, Harvard, Vancouver, ISO, and other styles

2

Sharma, Shivani, Sarah E. Cross, Carlin Hsueh, Ruseen P. Wali, Adam Z. Stieg, and James K. Gimzewski. "Nanocharacterization in Dentistry." International Journal of Molecular Sciences 11, no. 6 (June 17, 2010): 2523–45. http://dx.doi.org/10.3390/ijms11062523.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Lindén, L. Å., J. F. Rabek, E. Adamczak, S. Morge, H. Kaczmarek, and A. Wrzyszczynski. "Polymer networks in dentistry." Macromolecular Symposia 93, no. 1 (April 1995): 337–50. http://dx.doi.org/10.1002/masy.19950930139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Tigmeanu, Codruta Victoria, Anca Porumb, Alexandra Sabina Podariu, Mihaela Florica Adomnicai, Cristian Dan Krems, Virgil Ciobanu, Simina Camelia Dejica, and Angela Codruta Podariu. "Ethical Aspects in Pediatric Radiology." Revista de Chimie 69, no. 11 (December 15, 2018): 3304–9. http://dx.doi.org/10.37358/rc.18.11.6736.

Full text

Abstract:

Pediatric dentistry has become, in recent decades, a freestanding discipline, from the desire to improve dental assistance offered to children. It is a highly complex medical specialty, involving the triad of minor patient, doctor and the legal guardian of the patient. In conformity with European Community law, Law no. 95/2006 of Romania says it will get a written consent from the patient or his legal guardian; the methods of prevention, diagnosis and treatment of potential risk to the patient. Minor patient will be informed during the process of making decisions according to his understanding skills, (Law 46/2003), the final decision for acceptance the treatment belongs to the parents (consent of one of them is sufficient) or the legal guardian and the consent must be given in a written form (Law 95/2006; Bucur S.&al 2014). But conception as well as the doses used in pediatric dentistry are different from those used for adults. This paper aims to aware of dentists on ethical issues related to the indication of making child patient dental radiographs, in conformity with the recommendations and radiological current European rules (Guidelineson the use of dental radiographs, 2003).

APA, Harvard, Vancouver, ISO, and other styles

5

Teślak, Monika, Hanna Sobczak, Iwona Ordyniec-Kwaśnica, Barbara Kochańska, and Barbara Drogoszewska. "Awareness of Medication-Related Osteonecrosis of the Jaws amongst Dental Professionals in Poland." Applied Sciences 11, no. 11 (May 24, 2021): 4821. http://dx.doi.org/10.3390/app11114821.

Full text

Abstract:

Background: Medication-Related Osteonecrosis of the Jaws (MRONJ) is a serious complication of antiresorptive therapy. The aim of the study was to assess the level of knowledge and awareness regarding MRONJ among Polish dentists and students of dentistry. Methods: The online self-administered questionnaire was sent out electronically among dentists in Poland and dentistry students of the Medical University of Gdansk. The results obtained were statistically analyzed. The results were considered statistically significant if the condition p ≤ 0.05 was met. Results: A total of 203 respondents participated in this survey. A total of 94.6% of them declared knowledge of the term MRONJ. However, the length of bisphosphonates persistence in the body was known to 51.5% of participants, while the knowledge of oral and maxillofacial surgeons concerning this topic was significantly higher (87.0%). Conclusion: Dental and maxillofacial surgeons presented the highest level of knowledge about MRONJ. The remaining groups did not differ in their knowledge. It must be noted that the knowledge of the students was similar to that of dentists. A better level of knowledge by dentists could contribute to a decline of the occurrence of the disease in future. Theoretical and practical initiatives should be promoted to improve the knowledge about MRONJ.

APA, Harvard, Vancouver, ISO, and other styles

6

Kushkhov, Tembulat A., Diana A. Makhieva, Larisa V. Kardanova, Marina T. Tkhazaplizheva, and Adalbi Z. Khashukoev. "The Use of Polymeric Materials in Modern Dentistry." Key Engineering Materials 899 (September 8, 2021): 613–18. http://dx.doi.org/10.4028/www.scientific.net/kem.899.613.

Full text

Abstract:

The achievements and discoveries of chemical science have firmly established themselves in all branches of humanity. One of the most significant chemistry possibilities is the polymerization and polycondensation of compounds, which, in turn, are methods for producing polymers. Polymers are high molecular weight compounds consisting of many units (monomers) linked by chemical bonds. Unique polymer compounds are the basis of plastics, chemical fibers, rubber, paints, and varnishes, adhesives [8]. Polymers are used for the manufacture of removable prostheses, materials for fillings and inlays, orthodontic appliances, artificial teeth, dental implants, as well as in the creation of artificial heart valves, artificial kidney devices, artificial circulation, artificial heart [6].

APA, Harvard, Vancouver, ISO, and other styles

7

von Fraunhofer, J. Anthony. "Adhesion and Cohesion." International Journal of Dentistry 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/951324.

Full text

Abstract:

The phenomena of adhesion and cohesion are reviewed and discussed with particular reference to dentistry. This review considers the forces involved in cohesion and adhesion together with the mechanisms of adhesion and the underlying molecular processes involved in bonding of dissimilar materials. The forces involved in surface tension, surface wetting, chemical adhesion, dispersive adhesion, diffusive adhesion, and mechanical adhesion are reviewed in detail and examples relevant to adhesive dentistry and bonding are given. Substrate surface chemistry and its influence on adhesion, together with the properties of adhesive materials, are evaluated. The underlying mechanisms involved in adhesion failure are covered. The relevance of the adhesion zone and its importance with regard to adhesive dentistry and bonding to enamel and dentin is discussed.

APA, Harvard, Vancouver, ISO, and other styles

8

Song, Wenjing, and Shaohua Ge. "Application of Antimicrobial Nanoparticles in Dentistry." Molecules 24, no. 6 (March 15, 2019): 1033. http://dx.doi.org/10.3390/molecules24061033.

Full text

Abstract:

Oral cavity incessantly encounters a plethora of microorganisms. Plaque biofilm—a major cause of caries, periodontitis and other dental diseases—is a complex community of bacteria or fungi that causes infection by protecting pathogenic microorganisms from external drug agents and escaping the host defense mechanisms. Antimicrobial nanoparticles are promising because of several advantages such as ultra-small sizes, large surface-area-to-mass ratio and special physical and chemical properties. To better summarize explorations of antimicrobial nanoparticles and provide directions for future studies, we present the following critical review. The keywords “nanoparticle,” “anti-infective or antibacterial or antimicrobial” and “dentistry” were retrieved from Pubmed, Scopus, Embase and Web of Science databases in the last five years. A total of 172 articles met the requirements were included and discussed in this review. The results show that superior antibacterial properties of nanoparticle biomaterials bring broad prospects in the oral field. This review presents the development, applications and underneath mechanisms of antibacterial nanoparticles in dentistry including restorative dentistry, endodontics, implantology, orthodontics, dental prostheses and periodontal field.

APA, Harvard, Vancouver, ISO, and other styles

9

Skallevold, Hans Erling, Dinesh Rokaya, Zohaib Khurshid, and Muhammad Sohail Zafar. "Bioactive Glass Applications in Dentistry." International Journal of Molecular Sciences 20, no. 23 (November 27, 2019): 5960. http://dx.doi.org/10.3390/ijms20235960.

Full text

Abstract:

At present, researchers in the field of biomaterials are focusing on the oral hard and soft tissue engineering with bioactive ingredients by activating body immune cells or different proteins of the body. By doing this natural ground substance, tissue component and long-lasting tissues grow. One of the current biomaterials is known as bioactive glass (BAG). The bioactive properties make BAG applicable to several clinical applications involving the regeneration of hard tissues in medicine and dentistry. In dentistry, its uses include dental restorative materials, mineralizing agents, as a coating material for dental implants, pulp capping, root canal treatment, and air-abrasion, and in medicine it has its applications from orthopedics to soft-tissue restoration. This review aims to provide an overview of promising and current uses of bioactive glasses in dentistry.

APA, Harvard, Vancouver, ISO, and other styles

10

Chen, I.-Hao, Tzer-Min Lee, and Chih-Ling Huang. "Biopolymers Hybrid Particles Used in Dentistry." Gels 7, no. 1 (March 22, 2021): 31. http://dx.doi.org/10.3390/gels7010031.

Full text

Abstract:

This literature review provides an overview of the fabrication and application of biopolymer hybrid particles in dentistry. A total of 95 articles have been included in this review. In the review paper, the common inorganic particles and biopolymers used in dentistry are discussed in general, and detailed examples of inorganic particles (i.e., hydroxyapatite, calcium phosphate, and bioactive glass) and biopolymers such as collagen, gelatin, and chitosan have been drawn from the scientific literature and practical work. Among the included studies, calcium phosphate including hydroxyapatite is the most widely applied for inorganic particles used in dentistry, but bioactive glass is more applicable and multifunctional than hydroxyapatite and is currently used in clinical practice. Today, biopolymer hybrid particles are receiving more attention as novel materials for several applications in dentistry, such as drug delivery systems, bone repair, and periodontal regeneration surgery. The literature published on the biopolymer gel-assisted synthesis of inorganic particles for dentistry is somewhat limited, and therefore, this article focuses on reviewing and discussing the biopolymer hybrid particles used in dentistry.

APA, Harvard, Vancouver, ISO, and other styles

11

Alkattan, Rana, Luis Rojo, and Sanjukta Deb. "Antimicrobials in Dentistry." Applied Sciences 11, no. 7 (April 6, 2021): 3279. http://dx.doi.org/10.3390/app11073279.

Full text

Abstract:

Dental caries (decay) is caused by pathogenic bacterial species, which afflicts nearly a third of the world’s population from early childhood to old age. Treatment of tooth decay often involves the use of filling materials to restore the cavity; however, if untreated, it can cause pain, infection and eventually lead to tooth loss. Since the oral environment is colonised by many different microorganisms, bacterial biofilms can form on these filling materials, contributing to secondary caries that can eventually lead to the failure of the dental restoration. Thus, preventing the formation of bacterial biofilms is an important strategy in the management of caries, which has led to research enabling antimicrobial capabilities in dental materials. Materials and pharmaceutical sciences are in a continuous race against microbial resistance but are trying to balance between beneficial biota associated with the oral cavity, and, of course, avoiding a harmful effect on tissues is challenging. This has, therefore, stemmed a substantial interest in both preventive and restorative measures that would enable limiting the formation of secondary caries, oral microbial biofilms, and the retention of tooth mineral. Thus, innovative strategies are being explored and here we present a review with a focus on strategies that can inhibit or limit the formation of bacterial biofilms.

APA, Harvard, Vancouver, ISO, and other styles

12

Spencer, P., Y. Wang, M. P. Walker, D. M. Wieliczka, and J. R. Swafford. "Interfacial Chemistry of the Dentin/Adhesive Bond." Journal of Dental Research 79, no. 7 (July 2000): 1458–63. http://dx.doi.org/10.1177/00220345000790070501.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Robinson, C., R. C. Shore, S. J. Brookes, S. Strafford, S. R. Wood, and J. Kirkham. "The Chemistry of Enamel Caries." Critical Reviews in Oral Biology & Medicine 11, no. 4 (October 2000): 481–95. http://dx.doi.org/10.1177/10454411000110040601.

Full text

Abstract:

The chemical changes which occur during the process of carious destruction of enamel are complex due to a number of factors. First, substituted hydroxyapatite, the main component of dental enamel, can behave in a very complex manner during dissolution. This is due not only to its ability to accept substituent ions but also to the wide range of calcium phosphate species which can form following dissolution. In addition, the composition, i.e., the extent of substitution, changes throughout enamel in the direction of carious attack, i.e., from surface to interior. Both surface and positively birefringent zones of the lesion clearly illustrate that carious destruction is not simple dissolution. Selective dissolution of soluble minerals occurs, and there is the probability of reprecipitation. The role of fluoride here is crucial in that not only does it protect enamel per se but also its presence in solution means that rather insoluble fluoridated species can form very easily, encouraging redeposition. The role of organic material clearly needs further investigation, but there is the real possibility of both inhibition of repair and facilitation of redeposition. For the future, delivering fluoride deep into the lesion would appear to offer the prospect of improved repair. This would entail a delivery vehicle which solved the problem of fluoride uptake by apatite at the tooth surface. Elucidation of the role of organic material may also reveal putative mechanisms for encouraging repair and/or protecting the enamel mineral

APA, Harvard, Vancouver, ISO, and other styles

14

de Oliveira Barud, Hélida Gomes, Robson Rosa da Silva, Marco Antonio Costa Borges, Guillermo Raul Castro, Sidney José Lima Ribeiro, and Hernane da Silva Barud. "Bacterial Nanocellulose in Dentistry: Perspectives and Challenges." Molecules 26, no. 1 (December 24, 2020): 49. http://dx.doi.org/10.3390/molecules26010049.

Full text

Abstract:

Bacterial cellulose (BC) is a natural polymer that has fascinating attributes, such as biocompatibility, low cost, and ease of processing, being considered a very interesting biomaterial due to its options for moldability and combination. Thus, BC-based compounds (for example, BC/collagen, BC/gelatin, BC/fibroin, BC/chitosan, etc.) have improved properties and/or functionality, allowing for various biomedical applications, such as artificial blood vessels and microvessels, artificial skin, and wounds dressing among others. Despite the wide applicability in biomedicine and tissue engineering, there is a lack of updated scientific reports on applications related to dentistry, since BC has great potential for this. It has been used mainly in the regeneration of periodontal tissue, surgical dressings, intraoral wounds, and also in the regeneration of pulp tissue. This review describes the properties and advantages of some BC studies focused on dental and oral applications, including the design of implants, scaffolds, and wound-dressing materials, as well as carriers for drug delivery in dentistry. Aligned to the current trends and biotechnology evolutions, BC-based nanocomposites offer a great field to be explored and other novel features can be expected in relation to oral and bone tissue repair in the near future.

APA, Harvard, Vancouver, ISO, and other styles

15

Balan, Gabriela, Camelia Ana Grigore, Cristian Constantin Budacu, Alina Calin, Mihai Constantin, and Catalina Mihaela Luca. "Antisepsis, Disinfection Sterilization - Methods Used in Dentistry." Revista de Chimie 68, no. 1 (February 15, 2017): 186–91. http://dx.doi.org/10.37358/rc.17.1.5416.

Full text

Abstract:

The Pasteur principles regarding the cause of infection and the measures that need to be taken in order to prevent it have become a necessity of the first rank, representing, at the same time, the decisive factor of progress in modern dentistry. Nowadays, based on these principles, from the simplest bandage to the most complex surgery, these are carried out with the help of materials, dental hands and a surgery area where the pathogenic germs have been destroyed. These measures are based on asepsis and antisepsis, methods that perform the disinfection. Asepsis represents the prophylactic side of the disinfection and addresses all the moments that present the risk of contamination. It represents the set of measures by means of which the contact between germs and surgery or accidental plague is avoided. It is a prophylactic method. Antisepsis represents the totality of the means by which the destruction of the germs present in a plague, on the skin or in the environment is sought; it is a curative method. The main mechanisms of action of antiseptics on microorganisms are: altered outer membrane, amino group blockage, tiolitic group blockage, inhibition of ergosterol synthesis, cytoplasmic membrane alteration, energy decoupling, intracytoplasmic clotting. The study comprises 135 sterilizations performed over a period of two years; 107 (79.26%) were done in autoclaves, 7 (5.18%) in ethylene oxide, and 21 (15.56%) in hydrogen peroxide. The use of an antiseptic for long periods of time must be avoided due to the fact that, in the case of those containing heavy metals in their structure, they can be cumulated in the human body, and when toxic concentrations are reached, various toxicities can be triggered.

APA, Harvard, Vancouver, ISO, and other styles

16

Fernandez, Clara Couto, Ana Rita Sokolonski, Maísa Santos Fonseca, Danijela Stanisic, Danilo Barral Araújo, Vasco Azevedo, Ricardo Dias Portela, and Ljubica Tasic. "Applications of Silver Nanoparticles in Dentistry: Advances and Technological Innovation." International Journal of Molecular Sciences 22, no. 5 (March 2, 2021): 2485. http://dx.doi.org/10.3390/ijms22052485.

Full text

Abstract:

Silver nanoparticles (AgNPs) have been successfully applied in several areas due to their significant antimicrobial activity against several microorganisms. In dentistry, AgNP can be applied in disinfection, prophylaxis, and prevention of infections in the oral cavity. In this work, the use of silver nanoparticles in dentistry and associated technological innovations was analyzed. The scientific literature was searched using PubMed and Scopus databases with descriptors related to the use of silver nanoparticles in dentistry, resulting in 90 open-access articles. The search for patents was restricted to the A61K code (International Patent Classification), using the same descriptors, resulting in 206 patents. The results found were ordered by dental specialties and demonstrated the incorporation of AgNPs in different areas of dentistry. In this context, the search for patents reaffirmed the growth of this technology and the dominance of the USA pharmaceutical industry over AgNPs product development. It could be concluded that nanotechnology is a promising area in dentistry with several applications.

APA, Harvard, Vancouver, ISO, and other styles

17

Goyal, Shefali. "Silanes: Chemistry and applications." Journal of Indian Prosthodontic Society 6, no. 1 (2006): 14. http://dx.doi.org/10.4103/0972-4052.25876.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Khurshid, Zohaib, Sana Zohaib, Shariq Najeeb, Muhammad Zafar, Rabia Rehman, and Ihtesham Rehman. "Advances of Proteomic Sciences in Dentistry." International Journal of Molecular Sciences 17, no. 5 (May 13, 2016): 728. http://dx.doi.org/10.3390/ijms17050728.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Khurshid, Zohaib, Muhammad S. Zafar, Sana Zohaib, Shariq Najeeb, and Mustafa Naseem. "Green Tea (Camellia Sinensis): Chemistry and Oral Health." Open Dentistry Journal 10, no. 1 (May 11, 2016): 166–73. http://dx.doi.org/10.2174/1874210601610010166.

Full text

Abstract:

Green tea is a widely consumed beverage worldwide. Numerous studies have suggested about the beneficial effects of green tea on oral conditions such as dental caries, periodontal diseases and halitosis. However, to date there have not been many review articles published that focus on beneficial effects of green tea on oral disease. The aim of this publication is to summarize the research conducted on the effects of green tea on oral cavity. Green tea might help reduce the bacterial activity in the oral cavity that in turn, can reduce the aforementioned oral afflictions. Furthermore, the antioxidant effect of the tea may reduce the chances of oral cancer. However, more clinical data is required to ascertain the possible benefits of green tea consumption on oral health.

APA, Harvard, Vancouver, ISO, and other styles

20

Darvell, B. W. "Aspects of the chemistry of polysulphide impression material." Australian Dental Journal 32, no. 5 (October 1987): 357–67. http://dx.doi.org/10.1111/j.1834-7819.1987.tb00602.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

McDermott, A. J., S. Kothari, R. D. Short, R. van Noort, and M. R. Alexander. "Surface Chemistry of a High-copper Dental Amalgam." Journal of Dental Research 77, no. 12 (December 1998): 1999–2004. http://dx.doi.org/10.1177/00220345980770120801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

FERRACANE, J. L., J. W. STANSBURY, and F. J. T. BURKE. "Self-adhesive resin cements - chemistry, properties and clinical considerations." Journal of Oral Rehabilitation 38, no. 4 (December 6, 2010): 295–314. http://dx.doi.org/10.1111/j.1365-2842.2010.02148.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Runte, Christoph, and Dieter Dirksen. "Symmetry and Aesthetics in Dentistry." Symmetry 13, no. 9 (September 19, 2021): 1741. http://dx.doi.org/10.3390/sym13091741.

Full text

Abstract:

Animal bodies in general and faces in particular show mirror symmetry with respect to the median-sagittal plane, with exceptions rarely occurring. Bilateral symmetry to the median sagittal plane of the body also evolved very early. From an evolutionary point of view, it should therefore have fundamental advantages, e.g., more effective locomotion and chewing abilities. On the other hand, the recognition of bilaterally symmetric patterns is an important module in our visual perception. In particular, the recognition of faces with different spatial orientations and their identification is strongly related to the recognition of bilateral symmetry. Maxillofacial surgery and Dentistry affect effective masticatory function and perceived symmetry of the lower third of the face. Both disciplines have the ability to eliminate or mitigate asymmetries with respect to form and function. In our review, we will demonstrate symmetric structures from single teeth to the whole face. We will further describe different approaches to quantify cranial, facial and dental asymmetries by using either landmarks or 3D surface models. Severe facial asymmetries are usually caused by malformations such as hemifacial hyperplasia, injury or other diseases such as Noma or head and neck cancer. This could be an important sociobiological reason for a correlation between asymmetry and perceived disfigurement. The aim of our review is to show how facial symmetry and attractiveness are related and in what way dental and facial structures and the symmetry of their shape and color influence aesthetic perception. We will further demonstrate how modern technology can be used to improve symmetry in facial prostheses and maxillofacial surgery.

APA, Harvard, Vancouver, ISO, and other styles

24

Young, Anne. "The Chemistry of Medical and Dental Materials." Oral Diseases 9, no. 6 (October 17, 2003): 328. http://dx.doi.org/10.1034/j.1601-0825.2003.00963.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Buduru, Smaranda, Daniel Talmaceanu, Oana Baru, Rares Buduru, Camelia Szuhanek, and Anca Mesaros. "CAD-CAM Occlusal Splints: Milling and Printing Methods." Revista de Chimie 69, no. 12 (January 15, 2019): 3461–63. http://dx.doi.org/10.37358/rc.18.12.6769.

Full text

Abstract:

In dentistry, splints are often used as means of protecting teeth, ceramic restorations or for treating temporomandibular dysfunction. Digital dentistry has become a common tool involving the following: intraoral scanners, model scanners, design software, computerized milling or printing. Our study aims at comparing two different methods of producing an occlusal splint (milled and printed) with the end result of determining the most suitable solution for patients in terms of time, costs, efficiency, and medical results.

APA, Harvard, Vancouver, ISO, and other styles

26

Tatullo, Marco, Bruna Codispoti, Francesco Paduano, Manuel Nuzzolese, and Irina Makeeva. "Strategic Tools in Regenerative and Translational Dentistry." International Journal of Molecular Sciences 20, no. 8 (April 16, 2019): 1879. http://dx.doi.org/10.3390/ijms20081879.

Full text

Abstract:

Human oral-derived stem cells can be easily obtained from several oral tissues, such as dental pulp, periodontal ligament, from gingiva, or periapical cysts. Due to their differentiation potential, oral-derived mesenchymal stem cells are promising for tissue engineering and regenerative medicine. The regenerative ability showed by some oral tissues strongly depends on their sleeping adult stem cell populations that are able to repair small defects and to manage local inflammation. To date, researchers are working on effective and efficient methods to ensure safe and predictable protocols to translate stem cell research into human models. In the last decades, the challenge has been to finally use oral-derived stem cells together with biomaterials or scaffold-free techniques, to obtain strategic tools for regenerative and translational dentistry. This paper aims to give a clear point of view on state of the art developments, with some exciting insights into future strategies.

APA, Harvard, Vancouver, ISO, and other styles

27

Ashby, M. T. "Inorganic Chemistry of Defensive Peroxidases in the Human Oral Cavity." Journal of Dental Research 87, no. 10 (October 2008): 900–914. http://dx.doi.org/10.1177/154405910808701003.

Full text

Abstract:

The innate host response system is comprised of various mechanisms for orchestrating host response to microbial infection of the oral cavity. The heterogeneity of the oral cavity and the associated microenvironments that are produced give rise to different chemistries that affect the innate defense system. One focus of this review is on how these spatial differences influence the two major defensive peroxidases of the oral cavity, salivary peroxidase (SPO) and myeloperoxidase (MPO). With hydrogen peroxide (H2O2) as an oxidant, the defensive peroxidases use inorganic ions to produce antimicrobials that are generally more effective than H2O2 itself. The concentrations of the inorganic substrates are different in saliva vs. gingival crevicular fluid (GCF). Thus, in the supragingival regime, SPO and MPO work in unison for the exclusive production of hypothiocyanite (OSCN−, a reactive inorganic species), which constantly bathes nascent plaques. In contrast, MPO is introduced to the GCF during inflammatory response, and in that environment it is capable of producing hypochlorite (OCl−), a chemically more powerful oxidant that is implicated in host tissue damage. A second focus of this review is on inter-person variation that may contribute to different peroxidase function. Many of these differences are attributed to dietary or smoking practices that alter the concentrations of relevant inorganic species in the oral cavity ( e.g.: fluoride, F−; cyanide, CN−; cyanate, OCN−; thiocyanate, SCN−; and nitrate, NO3−). Because of the complexity of the host and microflora biology and the associated chemistry, it is difficult to establish the significance of the human peroxidase systems during the pathogenesis of oral diseases. The problem is particularly complex with respect to the gingival sulcus and periodontal pockets (where the very different defensive stratagems of GCF and saliva co-mingle). Despite this complexity, intriguing in vitro and in vivo studies are reviewed here that reveal the interplay between peroxidase function and associated inorganic chemistry.

APA, Harvard, Vancouver, ISO, and other styles

28

Dobrzański, Leszek, Anna Dobrzańska-Danikiewicz, and Lech Dobrzański. "Effect of Biomedical Materials in the Implementation of a Long and Healthy Life Policy." Processes 9, no. 5 (May 14, 2021): 865. http://dx.doi.org/10.3390/pr9050865.

Full text

Abstract:

This paper is divided into seven main parts. Its purpose is to review the literature to demonstrate the importance of developing bioengineering and global production of biomaterials to care for the level of healthcare in the world. First, the general description of health as a universal human value and assumptions of a long and healthy life policy is presented. The ethical aspects of the mission of medical doctors and dentists were emphasized. The coronavirus, COVID-19, pandemic has had a significant impact on health issues, determining the world’s health situation. The scope of the diseases is given, and specific methods of their prevention are discussed. The next part focuses on bioengineering issues, mainly medical engineering and dental engineering, and the need for doctors to use technical solutions supporting medicine and dentistry, taking into account the current stage Industry 4.0 of the industrial revolution. The concept of Dentistry 4.0 was generally presented, and a general Bioengineering 4.0 approach was suggested. The basics of production management and the quality loop of the product life cycle were analyzed. The general classification of medical devices and biomedical materials necessary for their production was presented. The paper contains an analysis of the synthesis and characterization of biomedical materials supporting medicine and dentistry, emphasizing additive manufacturing methods. Numerous examples of clinical applications supported considerations regarding biomedical materials. The economic conditions for implementing various biomedical materials groups were supported by forecasts for developing global markets for biomaterials, regenerative medicine, and tissue engineering. In the seventh part, recapitulation and final remarks against the background of historical retrospection, it was emphasized that the technological processes of production and processing of biomedical materials and the systematic increase in their global production are a determinant of the implementation of a long and healthy policy.

APA, Harvard, Vancouver, ISO, and other styles

29

Knosp, Helmut, Richard J. Holliday, and Christopher W. Corti. "Gold in dentistry: Alloys, uses and performance." Gold Bulletin 36, no. 3 (September 2003): 93–102. http://dx.doi.org/10.1007/bf03215496.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Yanakiev, Spartak. "Effects of Cinnamon (Cinnamomum spp.) in Dentistry: A Review." Molecules 25, no. 18 (September 12, 2020): 4184. http://dx.doi.org/10.3390/molecules25184184.

Full text

Abstract:

Dental medicine is one of the fields of medicine where the most common pathologies are of bacterial and fungal origins. This review is mainly focused on the antimicrobial effects of cinnamon essential oil (EO), cinnamon extracts, and pure compounds against different oral pathogens and the oral biofilm and the possible effects on soft mouth tissue. Basic information is provided about cinnamon, as is a review of its antimicrobial properties against the most common microorganisms causing dental caries, endodontic and periodontal lesions, and candidiasis. Cinnamon EO, cinnamon extracts, and pure compounds show significant antimicrobial activities against oral pathogens and could be beneficial in caries and periodontal disease prevention, endodontics, and candidiasis treatment.

APA, Harvard, Vancouver, ISO, and other styles

31

Petcu, Ana, Carmen Savin, Adriana Balan, Eugeniu Mihalas, Laura Maria Gavrila, Carina Balcos, and Magda Ecaterina Antohe. "Biomaterials Involved in Frontal Area Restorations in Pediatric Dentistry." Revista de Chimie 69, no. 12 (January 15, 2019): 3473–76. http://dx.doi.org/10.37358/rc.18.12.6772.

Full text

Abstract:

Aesthetics in dentistry have truly begun their role in the mid-twentieth century through attempts to perform orthodontic prosthetic restorations in the spirit of dentogenia, thereby making it as natural as possible.The aim of the study is represented by the identification of corellative aspects bethween the incidence of frontal edentation at young patients and the condition for a specific therapy. For the clinical study, 120 young patients were placed under observation, patients which showed up at the Paediatric Dentistry Clinic and private dental practices during the time interval 2016-2018, diagnosed with multiple and various pathologies in frontal area . The patients� age was between 5 and 20+ years, 34.21 % having the age between 15 and 20 years, 60.53 % with age past 20 years, age intervals which, although anchored within the young dentistry framework, present different morphological and functional features, which lay at the foundations of the selection or exclusion of one or the other of the solution therapy solutions of the partial toothless. Regarding the prevention of the therapeutic solutions within the studied group we observe the weight of the temporary solutions for the childhood duration, followed by restorations with composed materials, significant statistical percentages belonging to the fixed restorations with the metal and ceramic crowns, the lowest percentage belonging to the ceramic-type restorations with zirconium or fully ceramic ones, choice dictated by the social and economic criteria, at the patients in which the growth process stagnated, essential elements of the patient�s final behaviour with regard to the body scheme reception. Toothless architecture will lay at the basis of the prosthetic rehabilitation in full accordance with the factorial accumulation, embracing valences of high exigency at the teenager�s age, the frontal toothless being perceived as an amputation, forcing the teenager in isolation. In full accordance to the age and the particular clinical situation with regard to the successful esthetical restoration, the preparation and non-preparation actual techniques for the integrated ceramics constitute a selection option.

APA, Harvard, Vancouver, ISO, and other styles

32

Tsarev, V. N., R. V. Ushakov, N. N. Nuruev, A. R. Ushakov, Yu A. Trefilova, and A. A. Labazanov. "Microbiological justification of the application of cyprofloxacin and tinidazole combination for antimicrobial chemistry in dentistry." Medical alphabet, no. 2 (March 30, 2021): 18–22. http://dx.doi.org/10.33667/2078-5631-2021-2-18-22.

Full text

Abstract:

Relevance. According to modern concepts, virulent representatives of periodontal pathogenic bacteria are actively involved in the development of both periodontal pathology and various forms of odontogenic infection. The species diversity of these pathogens determines the need for a combined approach when choosing antimicrobial drugs.The aim of the work is to provide a microbiological substantiation of the use of a combined dosage form of ciprofloxacin and tinidazole for the treatment of periodontal and odontogenic infections based on the determination of the spectrum of action and the characteristics of the activity of the components.Materials and methods. Determination of the sensitivity of various strains of periodontal and odontogenic infection pathogens (P. intermedia, S. constellatus; S. sanguis, K. pneumoniae, S. aureus – MRSA) was carried out by the method of automated cultivation of strains with different concentrations of the tested drugs – ciprofloxacin and tinidazole.Results. Differences in the activity of the components of the combined preparation ciprofloxacin and tinidazole were found in terms of the sensitivity of strains of aerobic and anaerobic pathogens to them. Aerobic strains, including MRSA, were inhibited by ciprofloxacin in a low concentration range (6.25 μg / ml), but for some anaerobic strains the activity of ciprofloxacin was borderline (12.5 μg / ml). This confirmed the need to include tinidazole in the composition of the complex preparation.Conclusion. The combination of ciprofloxacin and tinidazole provides coverage of the full spectrum of periodontal and odontogenic infections and can be used as the agent of choice in the antimicrobial chemotherapy algorithm for head and neck infections.

APA, Harvard, Vancouver, ISO, and other styles

33

Bica, Cristina, Paul Pescaru, Ada Stefanescu, Mihaela Oana Docan, Krisztina Martha, Daniela Esian, and Diana Cerghizan. "Applicability of Zirconia-Prefabricated Crowns in Children with Primary Dentition." Revista de Chimie 68, no. 8 (September 15, 2017): 1940–43. http://dx.doi.org/10.37358/rc.17.8.5796.

Full text

Abstract:

Zirconia dioxide represents the current alternative in restoring primary teeth, being the most promising restorative material through its properties that offer. Zirconia crowns main properties are its aesthetics, resistance to fracture and compression, biocompatibility, alternative for the patients that are allergic to Ni-Cr. This cross-sectional study pointed out the correlations between the rate of applicability of the Ni-Cr crowns and the ZrO2 crowns, as well as the range of applicability of the ZrO2 crowns on temporary teeth among practitioners. The method of choice in the case of extensive carious lesions treatment on the primary teeth was the restoration using filling materials. From the 33,2% of the dentists who decide to apply a pedodontics crown, 75% use the Ni-Cr crowns, and only 25% of them choose the ZrO2 crown (p[0.0001). The applicability of ZrO2 crowns in pediatric dentistry is quite reduced, despite their physiognomic advantages, their excessive cost can also be an impediment for the patient�s parents.

APA, Harvard, Vancouver, ISO, and other styles

34

Flemming, Jasmin, Clara Theres Meyer-Probst, Karl Speer, Isabelle Kölling-Speer, Christian Hannig, and Matthias Hannig. "Preventive Applications of Polyphenols in Dentistry—A Review." International Journal of Molecular Sciences 22, no. 9 (May 5, 2021): 4892. http://dx.doi.org/10.3390/ijms22094892.

Full text

Abstract:

Polyphenols are natural substances that have been shown to provide various health benefits. Antioxidant, anti-inflammatory, and anti-carcinogenic effects have been described. At the same time, they inhibit the actions of bacteria, viruses, and fungi. Thus, studies have also examined their effects within the oral cavity. This review provides an overview on the different polyphenols, and their structure and interactions with the tooth surface and the pellicle. In particular, the effects of various tea polyphenols on bioadhesion and erosion have been reviewed. The current research confirms that polyphenols can reduce the growth of cariogenic bacteria. Furthermore, they can decrease the adherence of bacteria to the tooth surface and improve the erosion-protective properties of the acquired enamel pellicle. Tea polyphenols, especially, have the potential to contribute to an oral health-related diet. However, in vitro studies have mainly been conducted. In situ studies and clinical studies need to be extended and supplemented in order to significantly contribute to additive prevention measures in caries prophylaxis.

APA, Harvard, Vancouver, ISO, and other styles

35

Albrektsson, Tomas. "New implant designs and improved surface chemistry." Clinical Implant Dentistry and Related Research 21, S1 (March 2019): 3. http://dx.doi.org/10.1111/cid.12743.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Foong, Loke Kok, Mohammad Mehdi Foroughi, Armita Forutan Mirhosseini, Mohadeseh Safaei, Shohreh Jahani, Maryam Mostafavi, Nasser Ebrahimpoor, Maryam Sharifi, Rajender S. Varma, and Mehrdad Khatami. "Applications of nano-materials in diverse dentistry regimes." RSC Advances 10, no. 26 (2020): 15430–60. http://dx.doi.org/10.1039/d0ra00762e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

McRae, Marc P. "Correlation of Preadmission Organic Chemistry Courses and Academic Performance in Biochemistry at a Midwest Chiropractic Doctoral Program*." Journal of Chiropractic Education 24, no. 1 (April 1, 2010): 30–34. http://dx.doi.org/10.7899/1042-5055-24.1.30.

Full text

Abstract:

Purpose: Organic chemistry has been shown to correlate with academic success in the preclinical years of medicine, dentistry, and graduate physiology. The purpose of this study is to examine the relationship between undergraduate organic chemistry grades and first-semester biochemistry grades at a Midwest chiropractic doctoral program. Methods: Students enrolled in a first-semester biochemistry course who had completed the prerequisite courses in organic chemistry offered at this same institution were entered into the study. The total grade for each of the three courses was calculated using the midterm and final exam raw scores with a weighting of 50% each. Analysis consisted of obtaining correlation coefficients between the total grades of organic 1 with biochemistry and organic 2 with biochemistry. Using the biochemistry total grade, the students were divided into quartiles and course grades for both organic chemistry 1 and 2 were calculated. Results: For the 109 students in the study, the correlation coefficient between the biochemistry and organic chemistry 1 and biochemistry and organic chemistry 2 courses was r = 0.744 and r = 0.725, respectively. The difference in organic chemistry grades between those in the first and fourth quartiles was 63.2% and 86.9% for organic chemistry 1 (p < .001) and 60.9% and 79.4% for organic chemistry 2 (p < .001). Conclusion: This study shows that organic chemistry can be used as an indicator of future academic success in a chiropractic biochemistry course. Knowledge of such a relationship could prove useful to identify students who may potentially run into academic difficulty with first-year biochemistry.

APA, Harvard, Vancouver, ISO, and other styles

38

Helmis, C. G., J. Tzoutzas, H. A. Flocas, C. H. Halios, O. I. Stathopoulou, V. D. Assimakopoulos, V. Panis, M. Apostolatou, G. Sgouros, and E. Adam. "Indoor air quality in a dentistry clinic." Science of The Total Environment 377, no. 2-3 (May 2007): 349–65. http://dx.doi.org/10.1016/j.scitotenv.2007.01.100.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Lisetska, I. S. "The role of the student scientific circle in the training highly qualified specialists during distance learning." Modern pediatrics. Ukraine, no. 4(116) (May 26, 2021): 82–85. http://dx.doi.org/10.15574/sp.2021.116.82.

Full text

Abstract:

An important stage in the formation of the future specialist is the independent work of the applicant, in particular the involvement of the best representatives in research work. Applicants are attracted to the GDR through a student research group. The COVID-19 coronavirus pandemic and quarantine restrictions have forced almost all countries to reconsider educational strategies. Purpose — to evaluate student research group the role of the functioning in the higher medical educational institution at the Department of Pediatric Dentistry in the training of future highly qualified specialists and the peculiarities of its work during distance learning. Results. An important means of organizing the educational work of applicants for in-depth study of various aspects of pediatric dentistry is their research activities in independent work, in the process of which teachers are initiative and interested applicants who continue research within the student research group department, conducting research on selected topics. During distance learning IFNMU uses the site «Office 365 Cloud Services», which is accessible to all teachers and students. During the quarantine, student research group meetings are held in the format of online conferences in the Microsoft Teams program (previously created team with the type «Class» — student research group Department of Pediatric Dentistry, which added students of all courses of the Faculty of Dentistry and events in the program — in calendar according to the calendar-thematic plan student research group meetings, students and teachers are invited). Microsoft Teams is a teamroom for Office 365, which is a simpler version of learning management systems, but allows the learning team to communicate and share files. The program is convenient because it combines everything in a common work environment, which includes chat for discussion, file sharing and corporate programs. The student research group meeting was organized by video link. Conclusions. Thus, participation in the student research group Department of Pediatric Dentistry IFNMU gives applicants the opportunity to prepare a full-fledged scientific work that enhances the educational process, promotes their professional growth, helps to combine creativity, theoretical knowledge and practical skills. In addition, it increases the level of training of future specialists and the formation of research work skills as a component of professional training of applicants and the development of scientific potential of future scientists even during distance learning. No conflict of interest was declared by the author. Key words: research work, student research group, distance learning, applicant.

APA, Harvard, Vancouver, ISO, and other styles

40

Dobrzańska, Joanna, Lech B. Dobrzański, Klaudiusz Gołombek, Leszek A. Dobrzański, and Anna D. Dobrzańska-Danikiewicz. "Virtual Approach to the Comparative Analysis of Biomaterials Used in Endodontic Treatment." Processes 9, no. 6 (May 25, 2021): 926. http://dx.doi.org/10.3390/pr9060926.

Full text

Abstract:

The importance of endodontics is presented within our own concept of Dentistry Sustainable Development (DSD) consisting of three inseparable elements; i.e., Advanced Interventionist Dentistry 4.0 (AID 4.0), Global Dental Prevention (GDP), and the Dentistry Safety System (DSS) as a polemic, with the hypothesis of the need to abandon interventionist dentistry in favour of the domination of dental prevention. In view of the numerous systemic complications of caries that affect 3−5 billion people globally, endodontic treatment effectively counteracts them. Regardless of this, the prevention of oral diseases should be developed very widely, and in many countries dental care should reach the poorest sections of society. The materials and methods of clinical management in endodontic procedures are characterized. The progress in the field of filling materials and techniques for the development and obturation of root canals is presented. The endodontics market is forecast to reach USD 2.1 billion in 2026, with a CAGR of 4.1%. The most widely used and recognized material for filling root canals is gutta-percha, recognized as the “gold standard”. An alternative is a synthetic thermoplastic filler material based on polyester materials, known mainly under the trade name Resilon. There are still sceptical opinions about the need to replace gutta-percha with this synthetic material, and many dentists still believe that this material cannot compete with gutta-percha. The results of studies carried out so far do not allow for the formulation of a substantively and ethically unambiguous view that gutta-percha should be replaced with another material. There is still insufficient clinical evidence to formulate firm opinions in this regard. In essence, materials and technologies used in endodontics do not differ from other groups of materials, which justifies using material engineering methodology for their research. Therefore, a detailed methodological approach is presented to objectify the assessment of endodontic treatment. Theoretical analysis was carried out using the methods of procedural benchmarking and comparative analysis with the use of contextual matrices to virtually optimize the selection of materials, techniques for the development and obturation of root canals, and methods for assessing the effectiveness of filling, which methods are usually used, e.g., in management science, and especially in foresight research as part of knowledge management. The results of these analyses are presented in the form of appropriate context matrices. The full usefulness of the research on the effectiveness and tightness of root canal filling using scanning electron microscopy is indicated. The analysis results are a practical application of the so-called “digital twins” approach concerning the virtual comparative analysis of biomaterials used in endodontic treatment.

APA, Harvard, Vancouver, ISO, and other styles

41

Özcan, Mutlu, Mine Dündar, and M. Erhan Çömlekoğlu. "Adhesion concepts in dentistry: tooth and material aspects." Journal of Adhesion Science and Technology 26, no. 24 (August 10, 2012): 2661–81. http://dx.doi.org/10.1080/01694243.2012.691038.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Zegan, Georgeta, Daniela Anistoroaei, Elena Mihaela Carausu, Eduard Radu Cernei, and loredana Golovcencu. "Amoxicilin and Clavulanic Acid Intercaled Nanostructures for Dentistry Uses." Materiale Plastice 56, no. 2 (June 30, 2019): 396–98. http://dx.doi.org/10.37358/mp.19.2.5193.

Full text

Abstract:

Amoxicillin and clavulanic acid are two of the most commonly prescribed antibacterial worldwide for treating oral infectious diseases. Oral health is of big importance for well-being and general health. A few novel drug delivery systems were designed for oral treatment and prophylaxis of different diseases in the oral cavity. This work focused on the latest drug delivery development of the most common oral pathologies, namely, periodontitis, oral mucosal infections, dental caries and oral cancer. Herein we reveal the synthesis, characterization and application of chitosan nanoparticles for intracellular transport of the weakly cell-penetrating amoxicillin and clavulanic acid in order to improve their efficacy on bacterial infections.

APA, Harvard, Vancouver, ISO, and other styles

43

Qu, Xin, A. Wrzyszczynski, K. Pielichowski, J. Pielichowski, E. Adamczak, S. Morge, L. Å. Lindén, and J. F. Rabek. "Polymerization of Chitosan-Acrylic Salt for Use in Dentistry." Journal of Macromolecular Science, Part A 34, no. 5 (May 1997): 881–99. http://dx.doi.org/10.1080/10601329708014338.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Lugliè, P., Guglielmo Campus, C. Deiola, M. Mela, and D. Gallisai. "Oral condition, chemistry of saliva, and salivary levels of Streptococcus mutans in thalassemic patients." Clinical Oral Investigations 6, no. 4 (December 1, 2002): 223–26. http://dx.doi.org/10.1007/s00784-002-0179-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Toledano, Manuel, Marta Vallecillo-Rivas, María T. Osorio, Esther Muñoz-Soto, Manuel Toledano-Osorio, Cristina Vallecillo, Raquel Toledano, Christopher D. Lynch, María-Angeles Serrera-Figallo, and Raquel Osorio. "Zn-Containing Membranes for Guided Bone Regeneration in Dentistry." Polymers 13, no. 11 (May 29, 2021): 1797. http://dx.doi.org/10.3390/polym13111797.

Full text

Abstract:

Barrier membranes are employed in guided bone regeneration (GBR) to facilitate bone in-growth. A bioactive and biomimetic Zn-doped membrane with the ability to participate in bone healing and regeneration is necessary. The aim of the present study is to state the effect of doping the membranes for GBR with zinc compounds in the improvement of bone regeneration. A literature search was conducted using electronic databases, such as PubMed, MEDLINE, DIMDI, Embase, Scopus and Web of Science. A narrative exploratory review was undertaken, focusing on the antibacterial effects, physicochemical and biological properties of Zn-loaded membranes. Bioactivity, bone formation and cytotoxicity were analyzed. Microstructure and mechanical properties of these membranes were also determined. Zn-doped membranes have inhibited in vivo and in vitro bacterial colonization. Zn-alloy and Zn-doped membranes attained good biocompatibility and were found to be non-toxic to cells. The Zn-doped matrices showed feasible mechanical properties, such as flexibility, strength, complex modulus and tan delta. Zn incorporation in polymeric membranes provided the highest regenerative efficiency for bone healing in experimental animals, potentiating osteogenesis, angiogenesis, biological activity and a balanced remodeling. Zn-loaded membranes doped with SiO2 nanoparticles have performed as bioactive modulators provoking an M2 macrophage increase and are a potential biomaterial for promoting bone repair. Zn-doped membranes have promoted pro-healing phenotypes.

APA, Harvard, Vancouver, ISO, and other styles

46

Zhao, Ying, Xi He, Han Wang, Jiufu Zhu, Huimin Wang, Yan Zheng, Song Zhu, and Zhanchen Cui. "Synthesis of an urushiol derivative and its use for hydrolysis resistance in dentin adhesive." RSC Advances 11, no. 30 (2021): 18448–57. http://dx.doi.org/10.1039/d1ra00471a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Jiman, Paula Argentina, Marioara Moldovan, Codruta Sarosi, Alexandrina Muntean, Andreea Simona Pop, Viorica Tarmure, Catalin Popa, and Aurel George Mohan. "Surface characterization and cytotoxicity analysis of the titanium alloys for dentistry." Studia Universitatis Babeș-Bolyai Chemia 65, no. 1 (March 30, 2020): 149–62. http://dx.doi.org/10.24193/subbchem.2020.1.12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Eftimie Totu, Eugenia, Elena Voicila, Vlad Pistritu, Gheorghe Nechifor, and Corina Marilena Cristache. "Evaluation of Electrical Characteristics for PMMA-TiO2 Nanocomposites Used in Dentistry." Revista de Chimie 69, no. 1 (February 15, 2018): 155–59. http://dx.doi.org/10.37358/rc.18.1.6064.

Full text

Abstract:

In this paper, it is studied the influence of TiO2 nanoparticles content (0.2-5% wt:wt) on the electrical conductivities and the dielectric constants of poly (methyl methacrylate) (PMMA) nanocomposites used for 3D printing in dentistry. The nanocomposites films, which have been obtained applying the casting method followed by UV exposure, were mounted in a four electrodes cell for the electrochemical a.c. impedance analysis. The experimental data showed that both the dielectric constant and the electrical conductivity increase with increasing amounts of nano-TiO2 in nanocomposites. However, the change in the electrical conductivity is not significant for less 1% nano-titania added.

APA, Harvard, Vancouver, ISO, and other styles

49

Sidash, Julia V., and Elena V. Tkachenko. "POSSIBILITIES AND PERSPECTIVES OF HUMAN TYPOLOGIES TAKING INTO ACCOUNT IN DENTISTRY." Wiadomości Lekarskie 72, no. 5 (2019): 1079–82. http://dx.doi.org/10.36740/wlek201905224.

Full text

Abstract:

Introduction: Such sciences as differential physiology, differential psychology, differential anatomy and chemistry are developed greatly nowadays. They deal to human typologies. The scientific works big amount concerning dentistry in this aspect allows speaking about differentiated dentistry. The aim: To assess control locus in the UMSA Ukrainian students dependently on their dominant extremity as well as to assess and to compare face asymmetry expression in the guys and girls from Egypt and Ukraine studying at different courses. Materials and methods: 50 Ukrainian students from dental faculty different courses in the 1st series of the experiments, 18 girls and 18 guys from Egypt and Ukraine in the 2nd series. Methods: - determining the dominant extremity and control locus by survey; - computer modeling for facial expression assessment. Results: 43 students (85%, p<0,01) independently on dominant extremity demonstrate control internal locus and only 7 people (comprising 15%, p<0,01), 6 people (90%, p<0,01) from which were left-handers and all ambidexters) – the external one. These were the 1st experimental series results. We received following results in the experiment second part. Faces of the students from Egypt, guys in bigger extent, were more asymmetrical. We were taking photos of the students and then were measuring longitudinal and transversal sizes of face right and left halves. 10 guys from Egypt (55,6%, p<0,01) and 5 girls from Ukraine (27,78%, p<0,01) were distinguished by bigger longitudinal and transversal sizes as well as looked less harmonic while coinciding the face left halves than the right ones that can be explained in part by primary usage of left side while masticating as well as left hand usage at writing (in part in the Egyptian guys). Conclusions: We consider that our work can have significance in Maxillary-Facial and Plastic Surgery, Transplantology, Orthopedy, Prosthetic Dentistry, Neurology as well as Cosmetology and Psychology.

APA, Harvard, Vancouver, ISO, and other styles

50

Zaharia, Cristian, Roxana Oancea, Alin Gabriel Gabor, and Meda-Lavinia Negruțiu. "New Trends in Dental Adhesion—A Systematic Review." Timisoara Medical Journal 2020, no. 1 (October 26, 2020): 1. http://dx.doi.org/10.35995/tmj20200107.

Full text

Abstract:

Restorative dentistry is based on a continuous development of materials that make the best possible connection with dental tissues. Thus, dental adhesives have been researched with increasing interest. A successful adhesive system depends very much on its chemistry, as well as on the clinical procedures that must be appropriate for that type of dental adhesive. This review presents a retrospective of dental adhesives focusing on research into new types of adhesive systems that involves the use of nanoparticles. Dental adhesive systems are used in most clinical procedures related to restorative dentistry and can be classified into “etch-and-rinse” adhesives and “self-etch” adhesives. Recently, both types of adhesive systems have been modified, being loaded with different types of nanoparticles to try to improve them in terms of the thickness of the adhesive layer, but also to induce other special qualities. Therefore, in order to avoid compromising the restorative procedures by losing the restorations or by affecting the dental pulp due to cytotoxicity, several factors must be considered in choosing the adhesive system.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Chemistry in dentistry'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles