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demineralization

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https://www.readbyqxmd.com/read/29457353/effect-of-bristle-stiffness-of-manual-toothbrushes-on-normal-and-demineralized-human-enamel-an-in-vitro-profilometric-study
#1
A H AlShehab, A A AlHazoom, M H Alowa, H A AlAli, A A Abdulmohsen, I Farooq
OBJECTIVE: To compare the brushing abrasion carried out by manual toothbrushes with different bristle types (hard and soft) on normal and demineralized human enamel. MATERIALS AND METHODS: Thirty enamel blocks (N = 30) were prepared and were randomly divided into three main groups: A, teeth kept in artificial saliva with no brushing (control, n = 2); B, teeth brushed with toothbrushes with hard bristles (n = 14); and C, teeth brushed with toothbrushes with soft bristles (n = 14)...
February 19, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29456878/non-destructive-two-photon-excited-fluorescence-imaging-identifies-early-nodules-in-calcific-aortic-valve-disease
#2
Lauren M Baugh, Zhiyi Liu, Kyle P Quinn, Sam Osseiran, Conor L Evans, Gordon S Huggins, Philip W Hinds, Lauren D Black, Irene Georgakoudi
Calcifications occur during the development of healthy bone, and at the onset of calcific aortic-valve disease (CAVD) and many other pathologies. Although the mechanisms regulating early calcium deposition are not fully understood, they may provide targets for new treatments and for early interventions. Here, we show that two-photon excited fluorescence (TPEF) can provide quantitative and sensitive readouts of calcific nodule formation, in particular in the context of CAVD. Specifically, by means of the decomposition of TPEF spectral images from excised human CAVD valves and from rat bone prior to and following demineralization, as well as from calcific nodules formed within engineered gels, we identified an endogenous fluorophore that correlates with the level of mineralization in the samples...
November 2017: Nature Biomedical Engineering
https://www.readbyqxmd.com/read/29448551/synthesis-and-characterization-of-cation-exchange-fibers-with-radiation-induced-grafting-of-glycidyl-methacrylate-onto-cotton-cellulose
#3
Yeong Ju Lee, Joon Pyo Jeun, Dong Hyun Koo, Sun Young Kim, Phil Hyun Kang
Conventional ion exchange beads are used for purification and demineralization of water and for various other applications in the chemical synthesis, hydrometallurgy, and agricultural industries. However, there are some disadvantages associated with ion exchange beads, such as distillation causing porosity during solvent removal, pre-swelling of beads to allow for core functionalization, and pre-swelling of beads overnight prior to end use. Fibrous ion exchange materials have advantages over the conventional ion exchange beads, including simplification of the overall preparation...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29447057/effect-of-resin-infiltration-and-microabrasion-on-the-microhardness-surface-roughness-and-morphology-of-incipient-carious-lesions
#4
Basak Yazkan, R Banu Ermis
OBJECTIVE: The effects of resin infiltration and microabrasion on incipient carious lesions by surface microhardness, roughness and morphological assessments, and resistance to further acid attack of treated lesions were evaluated. MATERIAL AND METHODS: Eighty artificially-induced incipient lesions were randomly divided into five groups (n = 16): resin infiltration with an adhesive resin (Excite F, Ivoclar Vivadent, Schaan, Liechtenstein), resin infiltration with a resin infiltrant (Icon, DMG, Hamburg, Germany), microabrasion without polishing (Opalustre, Ultradent, South Jordan, UT, USA), microabrasion with polishing (Opalustre, Ultradent, Diamond Excel, FGM, Joinville, SC, Brazil), and distilled water (control group)...
February 15, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29446784/clinical-comparison-between-an-opaque-and-a-clear-pit-and-fissures-sealants-a-12-month-split-mouth-randomized-controlled-study
#5
G M Nardi, M Mazur, D Corridore, M Capocci, F Md Rinaldo, A Maruotti, L Ottolenghi, F Guerra
TRIAL DESIGN: We design a clinical splith-mouth, randomized controlled study, in which the retention of an opaque and clear pit and fissures sealants were evaluated and their effectiveness compared at 6 and 12 months of follow up. A secondary aim was to evaluate the possibility of using a fluorescence based intra-oral camera through the clear sealant to monitor enamel demineralization. METHODS: Consecutive young adolescents with at least two molars with code 0, 1, 2 caries evidenced following the International Caries Detection and Assessment System (ICDAS II) were enrolled...
January 2018: La Clinica Terapeutica
https://www.readbyqxmd.com/read/29446270/a-comparative-evaluation-of-apf-gel-cpp-acp-paste-alone-and-in-combination-with-carbon-dioxide-laser-on-human-enamel-resistance-to-acid-solubility-using-atomic-absorption-spectrometry-an-in-vitro-study
#6
Ali Nozari, Azade Rafiee, Sara Dehghan Khalili, Reza Fekrazad
BACKGROUND: The aim of this study was to compare the effects of acidulated phosphate fluoride (APF) gel, calcium phosphopeptide-amorphous calcium phosphate (CPP/ACP) paste alone and in combination with CO2 laser on the resistance of enamel to acid solubility. METHODS: Ninety enamel sections were obtained from 15 extracted teeth and were randomly assigned to six groups: 1) control group; 2) APF group; 3) CPP-ACP group; 4) CO2 laser group; 5) APF + CO2 group; and 6) CPP-ACP + CO2 group...
April 2018: Minerva Stomatologica
https://www.readbyqxmd.com/read/29444673/effect-of-tt-farnesol-and-myricetin-on-in-vitro-biofilm-formed-by-streptococcus-mutans-and-candida-albicans
#7
Guilherme Roncari Rocha, Elkin Jahir Florez Salamanca, Ana Letícia de Barros, Carmélia Isabel Vitorino Lobo, Marlise Inêz Klein
BACKGROUND: Dental caries is considered a multifactorial disease, in which microorganisms play an important role. The diet is decisive in the biofilm formation because it provides the necessary resources for cellular growth and exopolysaccharides synthesis. Exopolysaccharides are the main components of the extracellular matrix (ECM). The ECM provides a 3D structure, support for the microorganisms and form diffusion-limited environments (acidic niches) that cause demineralization of the dental enamel...
February 14, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29444502/starch-combined-with-sucrose-provokes-greater-root-dentine-demineralization-than-sucrose-alone
#8
Samilly Evangelista Souza, Aline Araújo Sampaio, Altair Antoninha Del Bel Cury, Yuri Wanderley Cavalcanti, Antônio Pedro Ricomini Filho, Jaime Aparecido Cury
Since there is no consensus about whether starch increases the cariogenic potential of sucrose, we used a validated 3-species biofilm model to evaluate if starch combined with sucrose provokes higher root dentine demineralization than sucrose alone. Biofilms (n = 18) composed by Streptococcus mutans (the most cariogenic bacteria), Actinomces naeslundii (which has amylolytic activity), and Streptococcus gordonii (which binds salivary amylase) were formed on root dentine slabs under exposure 8 ×/day to one of the following treatments: 0...
February 14, 2018: Caries Research
https://www.readbyqxmd.com/read/29436821/ph-sensitive-compounds-for-selective-inhibition-of-acid-producing-bacteria
#9
Yin Yang, Vytas Reipa, Guo Liu, Yuan Meng, Xiaohong Wang, Kenneth P Mineart, Vivek M Prabhu, Wenyuan Shi, Nancy J Lin, Xuesong He, Jirun Sun
Stimuli-responsive compounds that provide on-site, controlled antimicrobial activity promise an effective approach to prevent infections, reducing the need for systemic antibiotics. We present one novel pH-sensitive quaternary pyridinium salt (QPS) whose antibacterial activity is boosted by low pH and controlled by adjusting the pH between 4 and 8. Particularly, this compound selectively inhibits growth of acid-producing bacteria within a multispecies community. The successful antibacterial action of this QPS maintains the environmental pH above 5...
February 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29434529/high-protein-consumption-in-trained-women-bad-to-the-bone
#10
Jose Antonio, Anya Ellerbroek, Cassandra Evans, Tobin Silver, Corey A Peacock
Background: It has been posited that the consumption of extra protein (> 0.8 g/kg/d) may be deleterious to bone mineral content. However, there is no direct evidence to show that consuming a high-protein diet results in a demineralization of the skeleton. Thus, the primary endpoint of this randomized controlled trial was to determine if a high-protein diet affected various parameters of whole body and lumbar bone mineral content in exercise-trained women. Methods: Twenty-four women volunteered for this 6-month investigation ( n = 12 control, n = 12 high-protein)...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29434174/macrophages-highly-express-carbonic-anhydrase-2-and-play-a-significant-role-in-demineralization-of-the-ectopic-calcification
#11
Agian Jeffilano Barinda, Koji Ikeda, Ken-Ichi Hirata, Noriaki Emoto
Vascular calcification is an important risk factor for cardiovascular disease, and is closely associated with all-cause mortality. Recently, it has been revealed that vascular calcification is not a passive precipitation of circulating minerals, but is a process actively regulated through machinery similar to bone formation. During the bone remodeling, osteoclasts execute the bone resorption by releasing hydrogen ions to dissolve minerals; however, molecular mechanisms underlying decalcification of ectopically calcified lesions remain largely unknown...
October 16, 2017: Kobe Journal of Medical Sciences
https://www.readbyqxmd.com/read/29430962/effect-of-a-mouthrinse-containing-malva-sylvestris-on-the-viability-and-activity-of-microcosm-biofilm-and-on-enamel-demineralization-compared-to-known-antimicrobials-mouthrinses
#12
Aline Silva Braga, Juliana Gonçalves Pires, Ana Carolina Magalhães
The purpose of this study was to evaluate the antimicrobial (anti-biofilm) and anti-caries (enamel demineralization prevention) effects of Malva sylvestris (Malvatricin® Plus) compared with known antimicrobial mouthrinses. Microcosm biofilm was produced on enamel, using inoculum from pooled human saliva mixed with McBain saliva (0.2% sucrose) for 14 days. The biofilm was treated with mouthrinses for 1 min day-1. Oral-B® Complete, Listerine® Zero and Malvatricin® Plus had the greatest effect on the reduction of biofilm viability (p < 0...
February 11, 2018: Biofouling
https://www.readbyqxmd.com/read/29430398/revision-of-failed-rotator-cuff-reconstruction-with-a-large-humeral-head-cyst
#13
Bashar Reda, Catherine Coady, Ivan Wong
A revision rotator cuff repair is a technically challenging surgical procedure. This can be further complicated by the presence of poor quality of the cuff tissue, as well as a large greater tuberosity cyst, typically located at the rotator cuff footprint. This Technical Note discusses the surgical approach to deal with a revision rotator cuff tear with a large humeral head cyst. This described arthroscopic technique is performed in a single-stage procedure using a human dermal allograft (GraftJacket) for augmentation...
October 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29430102/comparative-evaluation-of-remineralizing-potential-of-fluoride-using-three-different-remineralizing-protocols-an-in-vitro-study
#14
Rahul Rao, Ashish Jain, Meenakshi Verma, Deepak Langade, Amol Patil
Background: Remineralization of noncavitated enamel is dependent on the bioavailability of calcium, phosphate, and hydroxyl ions in saliva. However, it is enhanced by the presence of fluoride. This study compared the remineralizing potential of three different topical fluoride agents. Materials and Methods: Fifteen extracted premolars were selected for the study. The crown of each tooth was longitudinally sectioned buccolingually and mesiodistally using a diamond disc so as to obtain sixty specimens which were embedded in acrylic molds...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430093/grape-seed-extract-an-innovation-in-remineralization
#15
Ketaki Dinkar Jawale, Sharad Basavraj Kamat, Jayakumar Appasaheb Patil, Girish Shankar Nanjannawar, Rutuja Vijay Chopade
Aim: The aim of this study was to determine remineralizing potential of grape seed extract (GSE) compared to casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and calcium glycerophosphate (CaGP) through pH-cycling model and subsequent evaluation using polarized light microscope (PLM). Subjects and Methods: Twenty sound human teeth fragments of ten teeth were obtained from the cervical portion of the roots and were stored in demineralizing solution for 96 h at 37°C to induce artificial root carious lesion...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29422460/effect-of-mouthrinses-containing-olive-oil-fluoride-and-their-combination-on-enamel-erosion-an-in-vitro-study
#16
H P Vivek, G M Prashant, Seema Geetha, Sabari Chandramohan, Md Imranulla, P B Srinidhi
AIM: The aim of the study was to evaluate the effect of mouth-rinses containing olive oil, fluoride, and their combination on enamel erosion. MATERIALS AND METHODS: An in vitro study of 45 enamel specimens, which were prepared from 45 extracted teeth, was employed. Each specimen was subjected to 10 alternative demineralization and remineralization cycles. Remineralizing cycle includes 5 minutes exposure with one of the mouthrinse, and demineralizing cycle includes 3 minute exposure to 1% citric acid...
February 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29422458/probiotics-in-caries-prevention
#17
V Naveen Kumar, Madhuram Krishnamurthy, Saravanan Poorni, Shankargouda Patil, A Thirumal Raj
Past few decades have seen a significant increase in the prevalence of dental caries at a global scale. To reduce the pervasiveness of cariogenic microflora, various efforts have been undertaken. However, completely eradicating caries-associated microorganisms has been futile. 1 Endogenous bacteria, such as Lactobacillus species, Streptococcus mutans, and Streptococcus sobrinus persisting in biofilms ferment carbohydrate and produce weak organic acids as by-products. This, in turn, results in a drop in the local pH well below the critical level, resulting in demineralization of tooth...
February 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29420674/histomorphometric-study-of-new-bone-formation-comparing-defect-healing-with-three-bone-grafting-materials-the-effect-of-osteoporosis-on-graft-consolidation
#18
Qiao Zhang, Dai Jing, Yufeng Zhang, Richard J Miron
PURPOSE: Bone grafting materials are frequently utilized in oral surgery and periodontology to fill bone defects and augment lost or missing bone. The purpose of this study was to compare new bone formation in bone defects created in both normal and osteoporotic animals loaded with three types of bone grafts from different origins. MATERIALS AND METHODS: Forty-eight female Wistar rats were equally divided into control normal and ovariectomized animals. Bilateral 2...
February 8, 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29414808/remineralization-potential-of-mints-containing-bioactive-agents-in-artificially-induced-root-caries
#19
Camila A Zamperini, Ana K Bedran-Russo
This study investigated the remineralization effect of experimental mint formulations containing bioactive agents (xylitol; green tea extract, GT; and amorphous calcium phosphate, ACP) in the progression of artificially induced root caries. Root caries lesions were induced by demineralization solution (pH 4.6; 96 h; 37°C). The lesions were treated with mint A, mint B, mint C, xylitol, GT, ACP, or remineralization solution (RS; negative control). Specimens were pH-cycled through treatments (5×/day; 3 min) and 6 cycles of acidic (pH 5...
February 8, 2018: Caries Research
https://www.readbyqxmd.com/read/29414166/thermogravimetric-analysis-and-kinetic-modeling-of-low-transition-temperature-mixtures-pretreated-oil-palm-empty-fruit-bunch-for-possible-maximum-yield-of-pyrolysis-oil
#20
Chung Loong Yiin, Suzana Yusup, Armando T Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida
The impacts of low-transition-temperature mixtures (LTTMs) pretreatment on thermal decomposition and kinetics of empty fruit bunch (EFB) were investigated by thermogravimetric analysis. EFB was pretreated with the LTTMs under different duration of pretreatment which enabled various degrees of alteration to their structure. The TG-DTG curves showed that LTTMs pretreatment on EFB shifted the temperature and rate of decomposition to higher values. The EFB pretreated with sucrose and choline chloride-based LTTMs had attained the highest mass loss of volatile matter (78...
January 31, 2018: Bioresource Technology
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