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dental materials

Robert Stencel, Jacek Kasperski, Wojciech Pakieła, Anna Mertas, Elżbieta Bobela, Izabela Barszczewska-Rybarek, Grzegorz Chladek
Secondary caries is one of the important issues related to using dental composite restorations. Effective prevention of cariogenic bacteria survival may reduce this problem. The aim of this study was to evaluate the antibacterial activity and physical properties of composite materials with silver sodium hydrogen zirconium phosphate (SSHZP). The antibacterial filler was introduced at concentrations of 1%, 4%, 7%, 10%, 13%, and 16% ( w / w ) into model composite material consisting of methacrylate monomers and silanized glass and silica fillers...
June 18, 2018: Materials
Firas Chakroun, Vera Colombo, Dave Lie Sam Foek, Luigi Maria Gallo, Albert Feilzer, Mutlu Özcan
PURPOSE: The objective of this study was to evaluate the anterior tooth movement without and with bonded fixed orthodontic retainers under incremental loading conditions. MATERIALS AND METHODS: Six extracted mandibular anterior human teeth were embedded in acrylic resin in True Form I Arch type and 3D reconstruction of Digital Volume Tomography (DVT) images (0.4 mm3 voxels) were obtained. The anatomy of each tooth was segmented and digitally reconstructed using 3D visualization software for medical images (AMIRA, FEI SVG)...
June 6, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Dongyuan Luo, Ting Li, Hongtao Wang, Yiyang Chen
OBJECTIVE: This report describes the design and printing of personalized nasal stents for cleft lip using 3-dimensional (3D) technology. MATERIALS AND METHODS: We used silicone rubber to make the impressions, a 3D laser scanner to obtain 3D data, and Dental SG resin cartridges as printing material. We printed the personalized nasal stents using a photosensitive resin printer. RESULTS: We placed the stents in patients after cleft lip surgery...
January 1, 2018: Cleft Palate-craniofacial Journal
V Davydenko, I Starchenko, А Davydenko, V Trufanova, V Kuznetsov
The analysis of publications shows that diverse multiple factors can induce changes in taste sensitivity and the main irritants are the chemicals of different types. However, the study of the effect of the components of dental structural materials on the state of lingual mucosa, in particular, taste sensors, has not been fully elucidated to date. The purpose of the paper was the study of the effect of monomer of the "Ftoraks" base acrylic resin on the state of the rats' lingual mucosa within 2-4 weeks after its impact...
May 2018: Georgian Medical News
Marc E H Jones, Peter W Lucas, Abigail S Tucker, Amy P Watson, Joseph J W Sertich, John R Foster, Ruth Williams, Ulf Garbe, Joseph J Bevitt, Floriana Salvemini
Eilenodontines are one of the oldest radiation of herbivorous lepidosaurs (snakes, lizards and tuatara) characterized by batteries of wide teeth with thick enamel that bear mammal-like wear facets. Unlike most reptiles, eilenodontines have limited tooth replacement, making dental longevity particularly important to them. We use both X-ray and neutron computed tomography to examine a fossil tooth from the eilenodontine Eilenodon (Late Jurassic, USA). Of the two approaches, neutron tomography was more successful and facilitated measurements of enamel thickness and distribution...
June 2018: Journal of the Royal Society, Interface
Constantino Ledesma-Montes, María Dolores Jiménez-Farfán, Juan Carlos Hernández-Guerrero
INTRODUCTION: Giant Osteosclerotic Lesions (GOLs) are a group of rarely reported intraosseous lesions. Their precise diagnosis is important since they can be confused with malignant neoplasms. OBJECTIVE: This retrospective study aimed to record and analyze the clinical and radiographic Giant Osteosclerotic Lesions (GOLs) detected in the maxillomandibular area of patients attending to our institution. Materials and Methods: Informed consent from the patients was obtained and those cases of 2...
June 11, 2018: Journal of Applied Oral Science: Revista FOB
Gabriela Cristina Santin, Alexandra Mussolino de Queiroz, Regina Guenka Palma-Dibb, Harley Francisco de Oliveira, Paulo Nelson Filho, Fábio Lourenço Romano
Patients undergoing radiotherapy treatment present more susceptibility to dental caries and the use of an orthodontic device increases this risk factor due to biofilm accumulation around the brackets. The objective of this study was to evaluate the shear bond strength to irradiated permanent teeth of orthodontic brackets bonded with conventional glass ionomer cement and resin-modified glass ionomer cement due to the fluoride release capacity of these materials. Ninety prepared human premolars were divided into 6 groups (n=15), according to the bonding material and use or not of radiation: CR: Transbond XT composite resin; RMGIC: Fuji Ortho LC conventional glass ionomer cement; GIC: Ketac Cem Easymix resin-modified glass ionomer cement...
March 2018: Brazilian Dental Journal
Gabriela Nishioka, Catina Prochnow, Aline Firmino, Marina Amaral, Marco Antonio Bottino, Luiz Felipe Valandro, Melo Renata Marques de
This in vitro study evaluated the fatigue strength of different ceramic materials indicated for monolithic restorations. Disc-shaped specimens were made according to ISO 6872 from five different ceramic materials: feldspathic ceramic (FC), polymer-infiltrated ceramic network (PIC), lithium disilicate glass-ceramic (LD), zirconia-reinforced lithium silicate glass-ceramic (ZLS), and high translucent tetragonal zirconia polycrystals doped by yttrium (YZ-HT). After obtaining the mean of each material (n = 5) from monotonic load-to-failure tests, specimens (n = 20) were subjected to fatigue tests (staircase method) using a biaxial flexural setup (piston-on-three-balls), to determine the fatigue strength...
June 11, 2018: Brazilian Oral Research
Jelena Simonovic, Bosko Toljic, Nadja Nikolic, Jasna Vujin, Radmila Panajotovic, Rados Gajic, Elena Bekyarova, Amelia Cataldi, Vladimir Parpura, Jelena Milasin
Stem cell-based therapies are considered a promising treatment modality for many medical conditions. Several types of stem cells with variable differentiation potentials have been isolated from dental tissues, among them stem cells from apical papilla (SCAP). In parallel, new classes of biocompatible nanomaterials have also been developed, including graphene and carbon nanotube-based materials. The aim of the study was to assess whether graphene dispersion (GD) and water-soluble single walled carbon nanotubes (ws-SWCNT), may enhance SCAPs capacity to undergo neural differentiation...
June 12, 2018: Journal of Biomedical Materials Research. Part A
Barbara Cvikl, Andreas Moritz, Katrin Bekes
Even in the 21st century, dental caries is considered a global burden, severely upsetting the health and quality of life of those affected. Apart from the usage of fluoride and regular oral hygiene, one of the most important prophylactic approaches against the occurrence of caries is the sealing of pits and fissures. However, the rapid progress of new materials and applications for sealing pits and fissures also raises new questions about their correct application. Recent literature on pit and fissure sealing, caries prevention, as well as caries risk assessment for both children and adults was reviewed...
June 12, 2018: Dentistry journal
Ali K Yetisen, Juan Leonardo Martinez-Hurtado, Barış Ünal, Ali Khademhosseini, Haider Butt
Wearables as medical technologies are becoming an integral part of personal analytics, measuring physical status, recording physiological parameters, or informing schedule for medication. These continuously evolving technology platforms do not only promise to help people pursue a healthier life style, but also provide continuous medical data for actively tracking metabolic status, diagnosis, and treatment. Advances in the miniaturization of flexible electronics, electrochemical biosensors, microfluidics, and artificial intelligence algorithms have led to wearable devices that can generate real-time medical data within the Internet of things...
June 11, 2018: Advanced Materials
Grzegorz Sokolowski, Agata Szczesio, Kinga Bociong, Karolina Kaluzinska, Barbara Lapinska, Jerzy Sokolowski, Monika Domarecka, Monika Lukomska-Szymanska
Resin matrix dental materials undergo contraction and expansion changes due to polymerization and water absorption. Both phenomena deform resin-dentin bonding and influence the stress state in restored tooth structure in two opposite directions. The study tested three composite resin cements (Cement-It, NX3, Variolink Esthetic DC), three adhesive resin cements (Estecem, Multilink Automix, Panavia 2.0), and seven self-adhesive resin cements (Breeze, Calibra Universal, MaxCem Elite Chroma, Panavia SA Cement Plus, RelyX U200, SmartCem 2, and SpeedCEM Plus)...
June 8, 2018: Materials
Inês Filipa Alves de Carvalho, Tiago Miguel Santos Marques, Filipe Miguel Araújo, Luís Filipe Azevedo, Helena Donato, André Correia
Owing to an increased demand for safe and esthetically pleasing dental materials, ceramics have been developed and optimized to rehabilitate anterior and posterior teeth. This evolution in ceramic materials is directly related to the development of sophisticated processing technologies and systems for use in dental medicine, particularly computer-aided design/computer-assisted manufacture (CAD/CAM) technology. This study is a systematic review outlining long-term clinical survival rates of single-tooth restorations fabricated with CAD/CAM technology with a minimum follow-up of 3 years...
July 2018: International Journal of Periodontics & Restorative Dentistry
Steven T Ratliff, Kawsu Barry
Retrospective dosimetry is the method of using materials on or near a person who is exposed to ionizing radiation to determine the amount of radiation received by the person. A possible candidate material for retrospective dosimetry is Ivoclar Vivadent IPS e.max® CAD ceramic dental restoration material, which exhibits radiation-induced thermoluminescence when exposed to gamma- and x-ray radiation from a Cs source. The purpose of this paper is to characterize the material and study the behavior of the thermoluminescence signal with radiation dose and with delay time between radiation exposure and thermoluminescence measurement...
June 8, 2018: Health Physics
M Ulu, T Pekbagriyanik, F Ibis, S Enhos, U K Ercan
Objectives: The aim of the present study was to compare antibiofilm efficacies of the laser in contact and noncontact application modes and cold atmospheric plasma (CAP) on Staphylococcus aureus biofilm grown on sandblasted, large grit, acid-etched (SLA) titanium discs as an in vitro model of biofilm eradication on dental implant materials. Methods: S. aureus biofilm was matured on titanium discs for 7 days then, treated with contact and noncontact Er:YAG laser and CAP...
June 2018: Nigerian Journal of Clinical Practice
Amanda Pinto Bandeira Rodrigues de Sousa, Kamilla França, Liliana Vicente Melo de Lucas Rezende, Déborah Lousan do Nascimento Poubel, Julio César Franco Almeida, Isabela Porto de Toledo, Fernanda Cristina Pimentel Garcia
BACKGROUND/AIMS: Fragment reattachment is a procedure that offers advantages, such as preservation of dental structure and maintenance of color, shape and translucency of the original tooth. The aim of this study was to analyze the reattachment techniques used to restore anterior teeth fractured by trauma. MATERIALS AND METHODS: The PubMed, LILACS, Web of Science, Cochrane and Scopus databases were searched in October 2016, and the search was updated in February 2017...
June 11, 2018: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Lien Mestach, Sara Huygens, An Goossens, Liesbeth Gilissen
BACKGROUND: Acrylates and methacrylates are acrylic resin monomers that are known to induce skin sensitization as a result of their presence in different materials, such as nail cosmetics, dental materials, printing inks, and adhesives. Allergic contact dermatitis resulting from the use of modern wound dressings containing them has only rarely been reported. OBJECTIVES: To describe 2 patients who developed allergic contact dermatitis caused by acrylic-based modern medical dressings and/or adhesives...
June 11, 2018: Contact Dermatitis
X Y Wang, L Yue
The longevity of direct adhesive restoration is related to the restorative materials, the patient and the professional. On one hand, dental composites/adhesives have been modified and developed to fulfill the criteria for clinical application. On the other hand, the clinical guidelines for adhesive restorations have been released and updated accordingly, which would prolong the longevity of restorations. In this commentary, the removal of carious tissues, interface preparation for bonding and application of adhesives are emphasized...
June 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Javad Yazdani, Elham Ahmadian, Simin Sharifi, Shahriar Shahi, Solmaz Maleki Dizaj
INTRODUCTION: Titanium based (Ti-based) materials have been used as dental implants due to their high biocompatibility, good mechanical strength and ideal osseointegration properties. Osseointegration of an implant is dependent on surface characteristics such as surface chemistry and topography. Nanotechnology has presented new and interesting applications in dentistry in recent years. The presence of nanoparticles on the implant surface can affect both the topography and surface chemistry, leading to different and outstanding specifications for implant...
June 7, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Y M Tian, R S Zhuge, Z T Zhang, D X Zheng, N Ding, Y M Li
OBJECTIVES: Pits and fissures sealing with flowable materials is a popular method for preventing caries in preventive dentistry while there is still microleakage existed. This in vitro study aimed to explore the effects of subpressure technique on the sealing ability of pit and fissure sealant. MATERIALS AND METHODS: One hundred and forty-one extracted human premolars were collected in this study and treated with different pressure (atmosphere pressure as group C, -0...
June 6, 2018: Journal of the Mechanical Behavior of Biomedical Materials
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