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https://www.readbyqxmd.com/read/28326714/-effect-of-pinus-massoniana-needle-extract-on-root-dentin-demineralization-in-vitro
#1
Tang Chengfang, Ruan Jianping, Zhu Yong, Li Zixia, Zuo Yanping, Xu Hongyan
OBJECTIVE: This study aims to evaluate the effects of Pinus massoniana needle extract (PMNE) on inhibiting demineralization of root dentin. METHODS: Root dentin blocks were randomly divided into distilled deionized water (DDW) group, fluoride sodium (NaF) group, and 4%, 8% and 12% PMNE groups according to the experimental solution used in the process of pH cycling in each group. All specimens in each group experienced pH cycling for 8 d. The dentin mineral density (DMD) of the normal dentin and demineralized dentin and their D-value (ΔDMD) were determined using micro computed tomography...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326713/-observation-and-analysis-of-microstructure-of-dentin-caries-lesions-through-3d-laser-scanning-microscope
#2
Xu Lixia, Xu Hongmei, Zhu Xiaoying, Sun Limei
OBJECTIVE: Microstructural changes in dentin carious lesions were investigated using a 3D laser scanning microscope, which has a morphological theoretical foundation in the further study of clinical caries disease prevention and treatments. METHODS: Six fresh extracted caries molars were prepared into cross-section specimens. The sections were examined by 3D and laser measuring morphology. RESULTS: Zones were identified in the lesions on the basis of their optical appearance...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28325103/fabrication-and-characterization-of-dendrimer-functionalized-nano-hydroxyapatite-and-its-application-in-dentin-tubule-occlusion
#3
Xuandong Lin, Fangfang Xie, Xueling Ma, Yuhong Hao, Hejia Qin, Jindong Long
The occlusion of dentinal tubules is an effective method to alleviate the symptoms of dentin hypersensitivity. In this paper, we successfully modified nano-hydroxyapatite (n-HAP)with carboxyl-terminated polyamidoamine dendrimers by an aqueous-based chemical method and verified by fourier transform infrared spectroscopy (FTIR) and transmission electron microscope(TEM). Then the demineralization dentin discs were randomly divided into 4 groups, corresponding to subsequent brushing experiments: deionized water and kept in artificial saliva (AS), dendrimer-functionalized n-HAP and stored in AS, n-HAP and saved in AS, dendrimer-functionalized n-HAP and stored in deionized water...
March 22, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28321651/effects-of-strontium-ranelate-treatment-on-osteoblasts-cultivated-onto-scaffolds-of-trabeculae-bovine-bone
#4
Gerluza Aparecida Borges Silva, Bruno Machado Bertassoli, Cristiane Aparecida Sousa, Juliano Douglas Albergaria, Rayan Silva de Paula, Erika Cristina Jorge
Blocks of Bovine bone have shown promising results as implantable scaffolds to promote bone regeneration. Strontium ranelate (SrR) is both an antiresorptive and an anabolic drug that has been indicated for oral administration to treat osteoporosis. Few studies, however, have investigated the local effects of SrR and its use in association with biomaterials thus far. In this work, we investigated SrR effects in cultures of primary osteoblasts (PO, from Wistar rats calvaria) and immortalized osteoblasts (IO, from MC3T3-E1 cell line) cultivated as a monolayer or in association with scaffolds of bovine bone in mineralized (MBB) and demineralized (DBB) forms...
March 20, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28319773/potential-of-water-washing-of-rape-straw-on-thermal-properties-and-interactions-during-co-combustion-with-bituminous-coal
#5
Qiulin Ma, Lujia Han, Guangqun Huang
The aim of this work was to study the thermal properties and interactions during co-combustion of rape straw (RS) before and after water-washing with bituminous coal. A series of experiments was conducted to investigate the properties and interactions during co-combustion of RS with bituminous coal (at 10, 20, 40 and 60% RS). The feasibility and potential of water-washing as an RS pre-treatment was also explored. Reactivity and the amount of heat released followed a quadratic trend, while changes to the degree of interactions between the fuels conformed to a cosine curve...
March 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28318154/-ex-vivo-assessment-of-the-potency-of-optical-coherence-tomography-for-the-detection-of-early-occlusal-caries
#6
Dai Xiao-Hua, Yao Hui, Lian Xiaoli, Li Yanni, Wang Yingying, Liu Xiaobin, Xing Lu
OBJECTIVE: This study aimed to evaluate the potency of optical coherence tomography (OCT) to detect early occlusal caries compared with clinical visual examination. METHODS: Approximately 97 sites of occlusal fissures on 77 extracted accessional human teeth were scored by three examiners using conventional visual examination and OCT. Results of histological examination on these sites obtained by polarimicroscope served as a gold standard to analyze the sensitivity (SE), specificity (SP), positive predictive value (PPV), and negative predictive value (NPV)...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28317350/-effects-of-dentin-demineralization-and-bond-strength-properties-of-bioactive-glass-containing-resin-adhesive
#7
Wang Yu, Gong Ling, Ji Yan, Zheng Lichun, Chen Song
OBJECTIVE: This study investigated the shear bond strength and the ability of resin adhesive containing different amounts of bioactive glass (BG) to prevent dentin demineralization. METHODS: BG bonds at 30%, 40%, and 50% concentrations comprised a mixture of coupling agents modifying BG and Single Bond 2. Forty permanent premolars extracted for orthodontic treatment were randomly divided into four groups, namely, control group (BG-free), 30% BG group, 40% BG group, and 50% BG group...
August 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28306162/analysis-of-the-effects-of-several-decalcifying-agents-alone-and-in-combination-with-sodium-hypochlorite-on-the-chemical-composition-of-dentine
#8
T Tartari, L Bachmann, R F Zancan, R R Vivan, M A H Duarte, C M Bramante
AIM: To investigate the effects of several decalcifying agents alone and in combination with sodium hypochlorite (NaOCl) on the organic and inorganic components of dentine using Attenuated Total Reflectance in Fourier Transform Infrared Spectroscopy (ATR-FTIR). METHODOLOGY: Dentine slices from bovine teeth were submitted to (n=5): 0.9% saline, 9% and 18% etidronic acid (HEDP), 5% and 10% tetrasodium EDTA (EDTANa4 ), 17% trisodium EDTA (EDTAHNa3 ), and 0.5% and 2...
March 17, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28304128/the-thickness-of-the-adhesive-layer-increases-the-misdiagnosing-of-the-radiolucent-zones-and-restoration-replacement-indication
#9
Tatiana Tambara Fröhlich, Gabriel Ferreira Nicoloso, Tathiane Larissa Lenzi, Fabio Zovico Maxnuck Soares, Rachel De Oliveira Rocha
OBJECTIVE: To evaluate the influence of the thickness of the adhesive layer and demineralized dentin on the decision to replace composite restoration. MATERIALS AND METHODS: Eighty human third molars with occlusal preparations (Class I) were randomly assigned to eight groups (n = 10): adhesive system (Clearfil SE Bond [CSE] or Scotchbond Universal Adhesive [SBU]); the number of adhesive layers (one or two); and substrate (sound or demineralized dentin). A blinded examiner evaluated radiographs of each restored tooth...
March 17, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28302328/experimental-pseudomonas-aeruginosa-mediated-rhino-sinusitis-in-mink
#10
S Kirkeby, A S Hammer, N Høiby, C M Salomonsen
OBJECTIVES: The nasal and sinus cavities in children may serve as reservoirs for microorganisms that cause recurrent and chronic lung infections. This study evaluates whether the mink can be used as an animal model for studying Pseudomonas aeruginosa mediated rhino-sinusitis since there is no suitable traditional animal model for this disease. METHODS: Nasal tissue samples from infected and control mink were fixed in formalin, demineralized, and embedded in paraffin...
December 27, 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28298819/diagnostic-accuracy-of-cone-beam-computed-tomography-in-identification-and-postoperative-evaluation-of-furcation-defects
#11
Natasha Pajnigara, Abhay Kolte, Rajashri Kolte, Nilufer Pajnigara, Vrushali Lathiya
BACKGROUND: Decision-making in periodontal therapeutics is critical and is influenced by accurate diagnosis of osseous defects, especially furcation involvement. Commonly used diagnostic methods such as clinical probing and conventional radiography have their own limitations. Hence, this study was planned to evaluate the dimensions of furcation defects clinically (pre- and post-surgery), intra-surgically, and by cone beam computed tomography (CBCT) (pre- and post-surgery). MATERIALS AND METHODS: The study comprised a total of 200 Grade II furcation defects in forty patients, with a mean age of 38...
July 2016: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/28296648/salivary-acquired-pellicle-inspired-dpspseekc-peptide-for-the-restoration-of-demineralized-tooth-enamel
#12
Yinxin Yang, Bo Yang, Mingze Li, Yaning Wang, Xiao Yang, Jianshu Li
Salivary acquired pellicle (SAP) is a layer of proteins and glycoproteins of salivary origin that tightly coat the tooth surface. Statherin is an important part of the SAP. The initial six-peptide sequence DpSpSEEK (where pS denotes phosphorylated serine) of the N-terminus of statherin can be immobilized on a hydroxyapatite (HAP) surface and the negatively charged domains of the DpSpSEEK side chain can catch free Ca(2+) in saliva due to the charge adsorption effect. In order to prepare more functional materials based on DpSpSEEK, we designed a cysteine-labeled peptide sequence DpSpSEEKC, which could conjugate other macromolecules by forming a sulfur-based linkage...
March 15, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28288894/endogenous-inspired-biomineral-installed-hyaluronan-nanoparticles-as-ph-responsive-carrier-of-methotrexate-for-rheumatoid-arthritis
#13
Md Mahmudul Alam, Hwa Seung Han, Shijin Sung, Jin Hee Kang, Keum Hee Sa, Hasan Al Faruque, Jungwan Hong, Eon Jeong Nam, In San Kim, Jae Hyung Park, Young Mo Kang
Methotrexate (MTX), an anchor drug for rheumatoid arthritis (RA), has been suffered from refractoriness and high toxicity limiting effective dosage. To mitigate these challenges, the ability to selectively deliver MTX to arthritis tissue is a much sought-after modality for the treatment of RA. In this study, we prepared mineralized nanoparticles (MP-HANPs), composed of PEGylated hyaluronic acid (P-HA) as the hydrophilic shell, 5β-cholanic acid as the hydrophobic core, and calcium phosphate (CaP) as the pH-responsive mineral...
March 11, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28288296/effect-of-cpp-acp-or-a-potassium-nitrate-sodium-fluoride-dentifrice-on-enamel-erosion-prevention
#14
F I Zawaideh, A I Owais, S Mushtaha
AIM: To investigate in situ/ex vivo the effect of remineralizing agents in the prevention of dental erosion in permanent and primary teeth. STUDY DESIGN: A randomized, controlled, double-blind study with crossover design with three treatment phases: Control, ProNamel(®) and Tooth Mousse(™). Twenty adults and children wore removable palatal appliances containing two insets of permanent and primary human enamel and used the corresponding assigned toothpaste twice daily for 10 days...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28281957/effects-of-remineralization-agents-on-artificial-carious-lesions
#15
Selcuk Savas, Ebru Kucukyilmaz, Esra Uzer Celik
PURPOSE: The purpose of this study was to evaluate the remineralization potentials of different agents on demineralized enamel surfaces. METHODS: Four hundred and sixty extracted human molars with artificial carious lesions were divided into six groups: (1) control; (2) acidulated phosphate fluoride (APF); (3) Curodont Repair (CR); (4) silver diamine fluoride (SDF); (5) ammonium hexafluorosilicate (SiF); and (6) SiF plus cetylpiridinium chloride (SiF+CPC). They were subdivided according to immersion periods (seven out of 30 days)...
November 15, 2016: Pediatric Dentistry
https://www.readbyqxmd.com/read/28280877/unusual-intraosseous-fossilized-soft-tissues-from-the-middle-triassic-nothosaurus-bone
#16
Dawid Surmik, Bruce M Rothschild, Roman Pawlicki
Fossilized soft tissues, occasionally found together with skeletal remains, provide insights to the physiology and functional morphology of extinct organisms. Herein, we present unusual fossilized structures from the cortical region of bone identified in isolated skeletal remains of Middle Triassic nothosaurs from Upper Silesia, Poland. The ribbed or annuli-shaped structures have been found in a sample of partially demineralized coracoid and are interpreted as either giant red blood cells or as blood vessel walls...
April 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28278579/ph-activated-nano-amorphous-calcium-phosphate-based-cement-to-reduce-dental-enamel-demineralization
#17
Mary A S Melo, Michael D Weir, Vanara F Passos, Michael Powers, Hockin H K Xu
Enamel demineralization is destructive, esthetically compromised, and costly complications for orthodontic patients. Nano-sized amorphous calcium phosphate (NACP) has been explored to address this challenge. The 20% NACP-loaded ortho-cement notably exhibited favorable behavior on reducing demineralization of enamel around brackets in a caries model designed to simulate the carious attack. The 20% NACP-loaded ortho-cement markedly promotes higher calcium and phosphate release at a low pH, and the mineral loss was almost two fold lower and carious lesion depth decreased the by 1/3...
February 21, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28275354/in-vitro-acid-mediated-initial-dental-enamel-loss-is-associated-with-genetic-variants-previously-linked-to-caries-experience
#18
Alexandre R Vieira, Merve Bayram, Figen Seymen, Regina C Sencak, Frank Lippert, Adriana Modesto
We have previously shown that AQP5 and BTF3 genetic variation and expression in whole saliva are associated with caries experience suggesting that these genes may have a functional role in protecting against caries. To further explore these results, we tested ex vivo if variants in these genes are associated with subclinical dental enamel mineral loss. DNA and enamel samples were obtained from 53 individuals. Enamel samples were analyzed for Knoop hardness of sound enamel, integrated mineral loss after subclinical carious lesion creation, and change in integrated mineral loss after remineralization...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28274867/evaluation-of-antioxidant-activities-and-chemical-analysis-of-sulfated-chitosan-from-sepia-prashadi
#19
Palaniappan Seedevi, Meivelu Moovendhan, Shanmugam Vairamani, Annaian Shanmugam
The chitin and chitosan of S. prashadi was prepared through demineralization, deproteinzation, deacetylation process and sulfation were carried by chlorosulfonic acid in N,N-dimethylformamide. The sulfate content in chitosan was found to be 18.9%. The carbon, hydrogen and nitrogen composition of the sulfated chitosan were recorded 39.09%, 6.95% and 6.58% respectively. The structural analysis was done by using FT-IR and NMR spectroscopy technique. The DSC curves of sulfated chitosan showed a large endothermic peak resolved with To value of 54...
March 6, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28274489/re-mineralizing-dentin-using-an-experimental-tricalcium-silicate-cement-with-biomimetic-analogs
#20
Xin Li, Jan De Munck, Kumiko Yoshihara, Mariano Pedano, Kirsten Van Landuyt, Zhi Chen, Bart Van Meerbeek
OBJECTIVES: To characterize the re-mineralization potential of an experimental zirconium oxide (ZrO2) containing tricalcium silicate (TCS) cement, TCS 50, with the incorporation of biomimetic analogs at demineralized dentin. METHODS: Class-I cavities were prepared in non- carious human third molars. The dentin cavities were demineralized using a pH-cycling protocol, involving 50 cyclic immersions in pH-4.8 and pH-7 baths for 0.5h and 2.5h, successively. The cavities were filled with TCS 50 with/without biomimetic analogs (3% polyacrylic acid, 8% sodium trimetaphosphate) being added to the mixed TCS 50 cement prior to application...
March 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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