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https://www.readbyqxmd.com/read/28741172/glass-ionomer-cement-inhibits-secondary-caries-in-an-in-vitro-biofilm-model
#1
Norbert Krämer, Miriam Schmidt, Susanne Lücker, Eugen Domann, Roland Frankenberger
OBJECTIVES: The objective of this study was to investigate the effect of different glass ionomer cements on secondary caries inhibition in a fully automated in vitro biofilm model. MATERIALS AND METHODS: One hundred and twenty-four extracted third molars received class V cavities and were filled with one conventional (Ketac Molar/KM), and two resin-modified glass ionomer cements (Photac Fil/PF, Ketac N100/KN, 3M Espe). A bonded resin composite (Single Bond Plus/Filtek Supreme XTE) served as control...
July 24, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28737157/oral-neoplasms-in-pickhandle-barracuda-sphyraena-jello-from-india
#2
V Singaravel, A Gopalakrishnan, K Raja, R Vijayakumar, S Asrafuzzaman
We report the spontaneous occurrence of oral neoplasms in pickhandle barracuda Sphyraena jello Cuvier, 1829 from Parangipettai, on the southeast coast of India. A total of 11736 fish were examined, of which 43 were affected with oral tumours, with an overall prevalence of 0.37%. Gross and clinical symptoms included reddish to grayish-white distended tumourous growths on the gingiva, intra-oral bones and tongue. The tumours exhibited delayed eruption and intra- or extra-oral swelling, varied in consistency from extremely firm to fleshy and released mucinous material...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28736601/classification-review-of-dental-adhesive-systems-from-the-iv-generation-to-the-universal-type
#3
REVIEW
Eshrak Sofan, Afrah Sofan, Gaspare Palaia, Gianluca Tenore, Umberto Romeo, Guido Migliau
Adhesive dentistry has undergone great progress in the last decades. In light of minimal-invasive dentistry, this new approach promotes a more conservative cavity design, which relies on the effectiveness of current enamel-dentine adhesives. Adhesive dentistry began in 1955 by Buonocore on the benefits of acid etching. With changing technologies, dental adhesives have evolved from no-etch to total-etch (4(th) and 5(th) generation) to self-etch (6(th), 7(th) and 8(th) generation) systems. Currently, bonding to dental substrates is based on three different strategies: 1) etch-and-rinse, 2) self-etch and 3) resin-modified glass-ionomer approach as possessing the unique properties of self-adherence to the tooth tissue...
January 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/28735793/dentinal-microcrack-development-after-canal-preparation-a-longitudinal-in-situ-micro-computed-tomography-study-using-a-cadaver-model
#4
Gustavo De-Deus, Júlio César de Azevedo Carvalhal, Felipe Gonçalves Belladonna, Emmanuel João Nogueira Leal Silva, Ricardo Tadeu Lopes, Renato Evando Moreira Filho, Erick Miranda Souza, José Claudio Provenzano, Marco Aurélio Versiani
INTRODUCTION: The purpose of this study was to evaluate the development of dentinal microcracks after root canal preparation with Reciproc and ProTaper Universal systems using an in situ cadaver model by means of a micro-computed tomography (micro-CT) imaging system. METHODS: At autopsy, 8 maxillary bone blocks having at least the first and second premolar teeth (n = 16) were excised, scanned at a resolution of 13.18 μm, and randomly distributed into 2 groups (n = 8) according to the preparation protocol: Reciproc and ProTaper Universal systems...
July 20, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28735790/patient-specific-finite-element-analysis-of-fiber-post-and-ferrule-design
#5
Monise de Paula Rodrigues, Priscilla Barbosa Ferreira Soares, Andréa Dollores Correia Miranda Valdivia, Roberto Sales Pessoa, Crisnicaw Veríssimo, Antheunis Versluis, Carlos José Soares
INTRODUCTION: A ferrule on anterior endodontic-treated teeth has been evaluated using clinical trials, in vitro tests, and finite element analysis (FEA). The patient-specific FEA with a nonuniform ferrule and nonlinear contact biting load associated with clinical validation can be used to predict failure. METHODS: A patient was selected with both maxillary central incisors with different ferrule designs who received endodontic treatment and restoration using a fiber post, composite core, and computer aided design and computer aided manufacturing lithium disilicate ceramic crowns...
July 20, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28735789/xp-shaper-a-novel-adaptive-core-rotary-instrument-micro-computed-tomographic-analysis-of-its-shaping-abilities
#6
Adham A Azim, Lucila Piasecki, Ulisses Xavier da Silva Neto, Alessandra Timponi Goes Cruz, Katharina A Azim
INTRODUCTION: The aim of this study was to investigate the shaping abilities of the XP Shaper (FKG, La Chaux-de-Fonds, Switzerland) and compare the findings with Vortex Blue (Dentsply Tulsa Dental Specialties, Tulsa, OK) using micro-computed tomographic imaging. METHODS: Twenty matched, extracted, mandibular, central incisors with a single, oval canal were scanned preoperatively at 25-μm resolution and postoperatively after instrumentation with either Vortex Blue in a crown-down manner up to size 30...
July 20, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28735355/a-systematic-review-of-dental-disease-management-in-cancer-patients
#7
Catherine H L Hong, Shijia Hu, Thijs Haverman, Monique Stokman, Joel J Napeñas, Jacolien Bos-den Braber, Erich Gerber, Margot Geuke, Emmanouil Vardas, Tuomas Waltimo, Siri Beier Jensen, Deborah P Saunders
INTRODUCTION: This systematic review aims to update on the prevalence of odontogenic-related infections and the efficacy of dental strategies in preventing dental-related complications in cancer patients since the 2010 systematic review. REVIEW METHOD: A literature search was conducted in the databases MEDLINE/PubMed and EMBASE for articles published between 1 January 2009 and 30 June 2016. Each study was assessed by 2 reviewers and the body of evidence for each intervention was assigned an evidence level...
July 22, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28734648/minimally-invasive-treatment-of-class-4-invasive-cervical-resorption-with-internal-approach-a%C3%A2-case-series
#8
Avi Shemesh, Joe Ben Itzhak, Michael Solomonov
Invasive cervical resorption (ICR) is a type of external resorption that can involve the coronal, middle, and apical parts of the root in its advanced stages. The diagnosis and treatment of ICR depend on the extent of the resorption into the dentin. The treatment of advanced ICR is challenging, and these teeth have poor prognoses. This article describes 4 cases of class 4 ICR diagnosed by using cone-beam computed tomography and treated with a minimally invasive internal approach with sodium hypochlorite irrigation and calcium hydroxide dressing...
July 19, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28734567/effect-of-calcium-phosphate-nanocomposite-on-in-vitro-remineralization-of-human-dentin-lesions
#9
Michael D Weir, Jianping Ruan, Ning Zhang, Laurence C Chow, Ke Zhang, Xiaofeng Chang, Yuxing Bai, Hockin H K Xu
OBJECTIVE: Secondary caries is a primary reason for dental restoration failures. The objective of this study was to investigate the remineralization of human dentin lesions in vitro via restorations using nanocomposites containing nanoparticles of amorphous calcium phosphate (NACP) or NACP and tetracalcium phosphate (TTCP) for the first time. METHODS: NACP was synthesized by a spray-drying technique and incorporated into a resin consisting of ethoxylated bisphenol A dimethacrylate (EBPADMA) and pyromellitic glycerol dimethacrylate (PMGDM)...
July 19, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28734061/evaluation-of-a-technique-for-color-correction-in-restoring-anterior-teeth
#10
Gabrielle Branco Rauber, Jussara Karina Bernardon, Luiz Clovis Cardoso Vieira, Luiz Narciso Baratieri
OBJECTIVE: This study aimed to evaluate the ability of the proposed technique in producing restorations that exhibit mimesis with tooth structure and to define a restorative clinical protocol. MATERIALS AND METHODS: For this study a typodont was used. The right upper central incisor with Class IV lesion was restored with the layering technique (reference tooth, RT). For the left upper central incisor with Class IV lesion, six teeth were restored monochromatically (test teeth, TT), using DA3...
July 22, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28732582/low-level-laser-therapy-may-reduce-dentin-hypersensitivity-after-scaling-and-root-planing
#11
Romina Brignardello-Petersen
No abstract text is available yet for this article.
July 17, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28731486/demineralized-dentin-and-enamel-matrices-as-suitable-substrates-for-bone-regeneration
#12
Nina Bono, Paolo Tarsini, Gabriele Candiani
BACKGROUND: In recent decades, tooth derivatives such as dentin (D) and enamel (E) have been considered as potential graft biomaterials to treat bone defects. This study aimed to investigate the effects of demineralization on the physical-chemical and biological behavior of D and E. METHODS: Human D and E were minced into particles (Ø<1 mm), demineralized and sterilized. Thorough physical-chemical and biochemical characterizations of native and demineralized materials were performed by SEM and EDS analysis and ELISA kits to determine mineral, collagen type I and BMP-2 contents...
July 20, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28729794/assessment-of-resin-dentin-interfacial-morphology-of-two-ethanol-based-universal-adhesives-a-scanning-electron-microscopy-study
#13
Mohamed Moustafa Awad
OBJECTIVE: The objective of this study was to assess the resin-dentin interfacial morphology created by two universal adhesives using scanning electron microscopy (SEM). MATERIALS AND METHODS: The occlusal surfaces of ten (n = 5) molars were reduced to expose a flat surface of dentin. Two universal adhesives, Scotchbond Universal Adhesive and Tetric N-Bond Universal, were independently applied to air-dried dentin. Light-cured resin-based composite restorative materials were used to incrementally build a composite "buildup...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729785/evaluation-of-dentinal-defects-during-root-canal-preparation-using-thermomechanically-processed-nickel-titanium-files
#14
Bertan Kesim, Burak Sagsen, Tugrul Aslan
OBJECTIVE: The aim of this study was to compare the incidence of root cracks after root canal instrumentation with thermomechanically processed nickel-titanium (Ni-Ti) files with different instrumentation kinematics. MATERIALS AND METHODS: A total of 150 extracted mandibular premolars with mature apices and straight root canals were divided into five groups and used in this study. In Group 1, 30 teeth were prepared using hand K-files and assigned to control group, Group 2 was instrumented using K3XF Rotary files (SybronEndo, Glendora, CA, USA) with continuous rotary motion...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28727999/drug-ion-co-delivery-multi-functional-nanocarrier-to-regenerate-infected-tissue-defect
#15
Jung-Hwan Lee, Ahmed El-Fiqi, Nandin Mandakhbayar, Hae-Hyoung Lee, Hae-Won Kim
Regeneration of infected tissues is a globally challenging issue in medicine and dentistry. Common clinical therapies involving a complete removal of infected areas together with a treatment of antimicrobial drugs are often suboptimal. Biomaterials with anti-bacterial and pro-regenerative potential can offer a solution to this. Here we design a novel nanocarrier based on a mesoporous silicate-calcium glass by doping with Ag ions and simultaneously loading antimicrobial drugs onto mesopores. The nanocarriers could controllably release multiple ions (silver, calcium, and silicate) and drugs (tetracycline or chlorohexidine) to levels therapeutically relevant, and effectively internalize to human dental stem cells (∼90%) with excellent viability, ultimately stimulating odontogenic differentiation...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28727472/relieving-dry-mouth-varying-levels-of-ph-found-in-bottled-water
#16
Bailey Jean Fisher, Angela Spencer, Van Haywood, Gayathri Konchady
It is estimated that 30% of people older than 60 years suffer from hyposalivation or dry mouth. Drinking water frequently has been recommended as a safe, non-pharmacologic way to combat hyposalivation. The saliva in patients with dry mouth is acidic. Beverages consumed daily may have an erosive potential on teeth. The pH and the mineral content of the beverage determine its erosive potential. An acidic beverage, therefore, may have harmful effects on mineralized tooth structures, causing erosion of enamel, dentin, and cementum...
July 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28727410/exosomes-mediate-epithelium-mesenchyme-crosstalk-in-organ-development
#17
Nan Jiang, Lusai Xiang, Ling He, Guodong Yang, Jinxuan Zheng, Chenglin Wang, Yimei Zhang, Sainan Wang, Yue Zhou, Tzong-Jen Sheu, Jiaqian Wu, Kenian Chen, Paulo G Coelho, Nicky M Tovar, Shin Hye Kim, Mo Chen, Yan-Heng Zhou, Jeremy J Mao
Organ development requires complex signaling by cells in different tissues. Epithelium and mesenchyme interactions are crucial for the development of the skin, hair follicles, kidney, lungs, prostate, major glands and the teeth. Despite myriad literature on cell-cell interactions and ligand-receptor binding, the roles extracellular vesicles in epithelium-mesenchyme interactions during organogenesis are poorly understood. Here, we discovered that ~100 nm exosomes were secreted by the epithelium and mesenchyme of a developing tooth organ, and diffused through the basement membrane...
July 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28722000/comparative-evaluation-of-shear-bond-strength-of-zirconia-restorations-cleansed-various-cleansing-protocols-bonded-with-two-different-resin-cements-an-in-vitro-study
#18
Sriram Sankar, Vijay Venkatesh Kondas, Sihi Vahanan Dhanasekaran, Prem Kumar Elavarasu
CONTEXT: Yttria partially stabilized tetragonal zirconia polycrystalline restorations have gained widespread use because of its enhanced strength and esthetics. During the try-in process, zirconia is likely to be contaminated with saliva. This contamination leads to a clear weakening of the bond between restorative material and cement. For this reason, zirconia surface should be cleaned before cementation. Hence, the purpose of this study is to compare the shear bond strength of zirconia restorations cleansed with various surface cleansing protocols bonded with two different resin cements...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28721317/ameloblastic-fibrodentinoma-a-case-with-varied-patterns-of-dysplastic-dentin
#19
Radhika M Bavle, Sudhakara Muniswammappa, Reshma Venugopal, Amulya S R
Ameloblastic fibrodentinoma is a benign odontogenic tumor belonging to the category of "odontogenic epithelium with odontogenic ectomesenchyme" along with recognition of induction in the form of dentin in atypical or dysplastic forms. The biological behaviour of ameloblastic fibrodentinoma is not very different from ameloblastic fibroma; hence, it is treated similarly by conservative procedures. It is important to understand the histopathogenesis of these rare tumors. Though rare, they are an independent entity awaiting recognition...
June 14, 2017: Curēus
https://www.readbyqxmd.com/read/28720286/stress-generation-during-pecking-motion-of-rotary-nickel-titanium-instruments-with-different-pecking-depth
#20
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
INTRODUCTION: The aim of this study was to evaluate the effect of different pecking depth on the stress generated by the screw-in forces of a rotating endodontic file in simulated canals. METHODS: Twenty simulated resin blocks with a J-shaped curvature were used. Twenty OneG files (MicroMega, Besançon, France) were assigned for a screw-in test depending on the pecking depth in 2 groups (n = 10). The files were operated at 300 rpm, and the up and down speed was controlled at 1 mm/s stroke velocity and a 10-millisecond dwell time using a customized device...
July 15, 2017: Journal of Endodontics
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