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Yuanyuan Li, Ming Fang, Fan Yu, Lina Niu, Franklin Tay, Jihua Chen
PURPOSE: The present study evaluated the influence of air entrapment within demineralized dentin on bond strength, nanoleakage, and degree of conversion. MATERIALS AND METHODS: A vacuum pump with adjustable pressure was used to control the gaseous pressure of a sealed container during the application of a two-step etch-and-rinse adhesive to demineralized dentin. Atmospheric pressure was used as control, and reduced pressures (0.08, 0.06, 0.04 MPa) as experimental variables...
June 14, 2018: Journal of Adhesive Dentistry
Abdolhamid Meimandi-Parizi, Ahmad Oryan, Emad Sayahi, Amin Bigham-Sadegh
BACKGROUND: propolis is known for its antioxidant, immune response modulating, and wound healing effects. In the present study in order to determine the bone healing capacity of the propolis extract, a critical sized, nonunion, radial bone defect model was repaired in rat, using chitosan and demineralized bone matrix (DBM) scaffolds along with propolis extract. MATERIALS AND METHODS: Seventy-two radial bone defects in 36 healthy male rats were randomly divided into 6 groups (n= 12/group)...
June 11, 2018: International Journal of Surgery
Gabriel Fernandez de Grado, Laetitia Keller, Ysia Idoux-Gillet, Quentin Wagner, Anne-Marie Musset, Nadia Benkirane-Jessel, Fabien Bornert, Damien Offner
Bone replacement might have been practiced for centuries with various materials of natural origin, but had rarely met success until the late 19th century. Nowadays, many different bone substitutes can be used. They can be either derived from biological products such as demineralized bone matrix, platelet-rich plasma, hydroxyapatite, adjunction of growth factors (like bone morphogenetic protein) or synthetic such as calcium sulfate, tri-calcium phosphate ceramics, bioactive glasses, or polymer-based substitutes...
January 2018: Journal of Tissue Engineering
Frances C Bach, Anna R Tellegen, Martijn Beukers, Alberto Miranda-Bedate, Michelle Teunissen, Willem A M de Jong, Stefan A H de Vries, Laura B Creemers, Karin Benz, Björn P Meij, Keita Ito, Marianna A Tryfonidou
The socioeconomic burden of chronic back pain related to intervertebral disc (IVD) disease is high and current treatments are only symptomatic. Minimally invasive strategies that promote biological IVD repair should address this unmet need. Notochordal cells (NCs) are replaced by chondrocyte-like cells (CLCs) during IVD maturation and degeneration. The regenerative potential of NC-secreted substances on CLCs and mesenchymal stromal cells (MSCs) has already been demonstrated. However, identification of these substances remains elusive...
May 29, 2018: Oncotarget
Jasmine Rayapudi, Carounanidy Usha
Background: Minimally invasive dentistry (MID) encompasses early caries diagnosis through caries risk assessment (CRA), early detection of incipient carious lesion including primary and secondary prevention based on scientific evidence that remineralization of demineralized enamel and dentin is possible if detected early. Although the dental curriculum focuses on the advantages of MID in tooth preservation, this science is not usually translated into practice. Aim: This study aimed to evaluate the knowledge, attitude, and skills of dental practitioners of Puducherry regarding the concepts of MID...
May 2018: Journal of Conservative Dentistry: JCD
Amr Alraies, David K Cole, Jeremy S Rees, Carl Glasse, Nigel Young, Rachel J Waddington, Alastair J Sloan
OBJECTIVES: Dietary stains can be adsorbed into the dentin of teeth. Using Orange II as a model dietary stain, this study investigated the strength of its interaction with the mineral and protein components of dentin matrix and how hydrogen peroxide (H2 O2 ) treatment influences this interaction. METHODS: Dentin slices were prepared from human teeth and were either deproteinized (5.6% sodium hypochlorite, 12 days), demineralised (0.5 M EDTA, 3 days) or left as intact control samples...
June 9, 2018: Journal of Dentistry
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
Kenneth H Chan, Daniel Fried
The enamel scattering coefficient decreases markedly with increasing wavelength from the visible to the near-infrared (NIR). However, beyond 1300 nm, the scattering coefficient is difficult to measure, and it is not known whether light scattering continues to decrease significantly at longer wavelengths. It is hypothesized that water absorption is a major contributor to the contrast between sound and demineralized enamel beyond 1300 nm since deeply penetrating photons in sound enamel are likely absorbed by water...
June 2018: Journal of Biomedical Optics
Andreia R Bucci, Larissa Marcelino, Renata K Mendes, Augusto Etchegaray
The oral pathogen Streptococcus mutans is involved in tooth decay by a process that initiates with biofilm adhesion and caries development. The presence of other microbes such as Candida albicans may worsen the demineralization process. Since both microbes are virulent to the host and will proliferate under specific host immune deficiencies and systemic diseases, it is important to study antimicrobial substances and their effects on both pathogens. There are several antiseptic agents used to reduce plaque biofilm and its outcome (dental caries and/or periodontal disease)...
June 6, 2018: World Journal of Microbiology & Biotechnology
Muneaki Tamura, Marni E Cueno, Kazumasa Abe, Noriaki Kamio, Kuniyasu Ochiai, Kenichi Imai
Candida albicans causes opportunistic fungal infections usually hidden among more dominant bacteria and does not exhibit high pathogenicity in vivo. Among the elderly, due to reduced host resistance to pathogens attributable to immunoscenesence, oral candidiasis is more likely to develop often leading to systemic candidiasis. Surface pre-reacted glass ionomer filler (S-PRG filler) is an ion-releasing functional bioactive glass that can release and recharge six ions which in turn strengthens tooth structure, inhibits demineralization arising from dental caries, and suppresses dental plaque accumulation...
June 6, 2018: Cell Stress & Chaperones
Tinsy Mary Titty, Suprabha Baranya Shrikrishna, Arathi Rao, Ramya Shenoy, Srikant Natarajan
Context: Dentifrices-containing remineralizing agents are known to be effective in remineralization of early enamel lesions. Aims: This study aimed to compare and evaluate the changes in surface roughness, surface morphology, and mineral content of demineralized enamel lesion after treatment with dentifrices-containing sodium monofluorophosphate, amine fluoride, and Anticay® (calcium sucrose phosphate with inorganic amorphous calcium phosphate). Settings and Design: This was an in vitro study...
April 2018: Contemporary Clinical Dentistry
Lin Chen, Chengyi Wang, Shanshan Liu, Qinzheng Hu, Liang Zhu, Chuqing Cao
A long-term performance of membrane capacitive deionization (MCDI) was investigated at the presence of organic matter, which has contributed to the understanding of fouling phenomena and energy efficiency. The commercial humic acid and sodium alginate were adopted as model substances representative of natural organic matter, and different ions including sodium and calcium were selected as important parameters considered in both model substances. The experimental results showed reductions in the salinity removal ability and increments of energy usage due to the organic fouling of ion-exchange membranes and carbon electrodes...
February 2018: Chemosphere
Philipp Moroder, Elisabeth Böhm, Markus Scheibel
To date, specific surgical procedures are available for the treatment of anterior shoulder instability with substantial bony glenoid defects, as well as for patients without osseous lesions. However, specific treatment options are lacking for the frequently observed small to intermediate glenoid defects, which may not necessitate glenoid reconstruction surgery according to current guidelines but can still jeopardize the outcome after mere soft-tissue stabilization procedures. This article describes the so-called arthroscopic Bankart-Plus procedure for the treatment of anterior shoulder instability with small to intermediate bony glenoid defects...
April 2018: Arthroscopy Techniques
Anna Potysz, Jakub Kierczak, Malgorzata Grybos, Artur Pędziwiatr, Eric D van Hullebusch
This study was undertaken to simulate experimentally the weathering of slags disposed nearby soil rhizosphere. The aim of the research was to differentiate the effect of pH and organics on slags dissolution as well as to indicate weathering sequence of phase components. The studied slags are mainly composed of Fe (34.5 wt%) and Si (17.9 wt%) and contain up to 3761 mg kg-1 of Cu and 3628 mg kg-1 of Zn. The main identified phases are fayalite and glass, whereas sulfides and metallic Cu are volumetrically minor...
June 1, 2018: Journal of Environmental Management
Marina Spanka, Tim Mansfeldt, Ruth Bialucha
Basic oxygen furnace slags (BOS) are by-products of basic oxygen steel production. Whereas the solubility of some elements from these slags has been well investigated, information about the mineralogy and related leaching, i.e., availability of the environmentally relevant elements chromium (Cr), molybdenum (Mo), and vanadium (V), is still lacking. The aim of this study was to investigate these issues with a modified, four-fraction-based, sequential extraction procedure (F1-F4), combined with X-ray diffraction, of two BOS...
June 2, 2018: Environmental Science and Pollution Research International
Rosalia Tatano, Benjamin Berkels, Eva E Ehrlich, Thomas M Deserno, Ulrike B Fritz
Previous work has shown qualitatively that detection of demineralized tooth areas (white spot lesions, WSL) is more reliable in digital photographs (DP) as in quantitative light-induced fluorescence (QLF) images. Based on non-rigid, multi-model image registration, we now quantitatively compare manual and automatic markings in both modalities.  Methods:  After braces removal, pairs of DP and QLF were acquired from 124 teeth of 31 patients. Three experienced raters marked the WSL on both DP and QLF images, each of which was presented twice in randomized order...
May 31, 2018: Dento Maxillo Facial Radiology
Dina-Wahied El Assal, Ali-Mohamed Saafan, Dina-Hassan Moustafa, Marwa-Adel Al-Sayed
Background: The aim of this study was to evaluate the effect of combining fractional CO2 LASER and nanohydroxy apatite on surface microhardness and color of enamel with initial defects. Material and Methods: Two types of nano hydroxylapatite (nHAP) was prepared; Pure hydroxyapatite (nHA) and Fluoro hydroxyapatite (nFHA), Sixty extracted premolar teeth without visible caries or structural defects on enamel surface were used, immersed in 10 ml of a demineralizing solution for 2 weeks to create artificial white spot lesions, they were randomly allocated into two groups; Group 1: nHA, Group 2: nFHA, each group is then subdivided into 2 subgroups (A and B) where two different in vitro remineralization procedures have been performed, the first procedure utilizes a 10 wt% nHA aqueous slurries only, the second was first exposed to irradiation from a fractional CO2 laser then (nHAP) was applied...
May 2018: Journal of Clinical and Experimental Dentistry
Vanara Florêncio Passos, Mary Anne Sampaio de Melo, Juliana Paiva Marques Lima, Felipe Franco Marçal, Cecília Atem Gonçalves de Araújo Costa, Lidiany Karla Azevedo Rodrigues, Sérgio Lima Santiago
This research explored the potential of Camellia sinensis-derived teas and active compounds to be used as treatments to prevent dentin wear. Human root dentin slabs were randomly assigned to 5 groups (n = 10) as follows: distilled water (DW, control), epigallocatechin-3-gallate (EGCG), theaflavin gallate derivatives (TF), commercial green tea (GT), and commercial black tea (BT). The samples were submitted to a pellicle formation and an erosive cycling model (5x/day, demineralization using 0.01 M hydrochloric acid/60 s) followed by remineralization (human stimulated saliva/60 min) for three days...
May 24, 2018: Brazilian Oral Research
Mariana Leonel Martins, Karla Lorene de França Leite, Edivaldo Ferreira Pacheco-Filho, Adriana Farah de Miranda Pereira, Maria Teresa Villela Romanos, Lucianne Cople Maia, Andréa Fonseca-Gonçalves, Wilton Wilney Nascimento Padilha, Yuri Wanderley Cavalcanti
OBJECTIVE: The efficacy of a red propolis hydro-alcoholic extract (RP) in controlling Streptococcus mutans biofilm colonization was evaluated. The effect of RP on dental demineralization was also investigated. METHODS: Chemical composition was determined by High Performance Liquid Chromatography (HPLC). Minimum Inhibitory and Bactericidal Concentration (MIC and MBC, respectively) were investigated against Streptococcus mutans (ATCC 25175). The cytotoxic potential of 3% RP in oral fibroblasts was observed after 1 and 3 min...
May 23, 2018: Archives of Oral Biology
Myoung Geun Lee, Ji-Hyun Jang, Jack L Ferracane, Harry Davis, Han Eul Bae, Dongseok Choi, Duck-Su Kim
OBJECTIVES: The purpose of this study was to evaluate the effect of bioactive glass (BAG)-containing composite on dentin remineralization. METHODS: Sixty-six dentin disks with 3 mm thickness were prepared from thirty-three bovine incisors. The following six experimental groups were prepared according to type of composite (control and experimental) and storage solutions (simulated body fluid [SBF] and phosphate-buffered saline [PBS]): 1 (undemineralized); 2 (demineralized); 3 (demineralized with control in SBF); 4 (demineralized with control in PBS); 5 (demineralized with experimental composite in SBF); and 6 (demineralized with experimental composite in PBS)...
May 25, 2018: Journal of Dentistry
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