Search results for "Enamel"
showing 10 items of 277 documents
Sāls nikotīna bāzes tvaicēšanas ietekme uz zobu krāsas maiņu
2022
Sāls nikotīna bāzes elektronisko cigarešu lietošana nesen ir kļuvusi populāra un pakāpeniski aizstāj tradicionālo smēķēšanu . Šī pētījuma mērķis bija noskaidrot nikotīna sāls elektronisko cigarešu lietošanas ietekmi uz zobu emaljas krāsas maiņu. Tika secinā ts, ka pašizveidotai fotometriskai sistēmai ir piemīt augsta precizitāte. Anketas dati norādīja, ka smēķētāji biežāk tīra zobus un lieto sojas mērci, taču retāk dzer tēju salīdzinot ar nesmēķētājiem. Smēķētāju iecienītākā garša bija augļu šķidrumi ar 20 mg /ml nikotīna. Smēķēšana kombinācijā ar tējas dzeršanu izmainīja zobu krāsu toņa zilidzelteno līdzsvaru (CIELab b* telpiskā koordināte) uz dzelteno pusi. Viena mēneša ilga smēķēšana spē…
Dental enamel: a new target of BPA
2012
Dental enamel: a new target of BPA. Journée des jeunes chercheurs
Effect of bisphenol A on ameloblasts and tooth enamel mineralization
2011
Effect of bisphenol A on ameloblasts and tooth enamel mineralization. Journées de l’école doctorale
In vivo evaluation of the effects of 10% carbamide peroxide and 3.5% hydrogen peroxide on the enamel surface
2007
Objectives: Bleaching of vital teeth performed at home by the patient under the dentist’s supervision, using low-concentration peroxides and custom-fitted trays specifically designed for this purpose, is one of several options for this type of dental treatment, whether alone or in combination with another in-office bleaching technique. The objective of this study is to analyse the effect on the enamel surface of two bleaching products recommended for this technique. Materials & methods: Two bleaching products were used: VivaStyle (Vivadent), a 10% carbamide peroxide, and FKD (Kin), a 3.5% hydrogen peroxide. They were applied in trays to the anterior teeth of 20 patients (10 in each group). …
Spectrophotometric evaluation of dental bleaching under orthodontic bracket in enamel and dentin
2013
Aware of the diffusion capacity of bleaching in the dental tissues, many orthodontists are subjecting their patients to dental bleaching during orthodontic treatment for esthetic purposes or to anticipate the exchange of esthetic restorations after the orthodontic treatment. For this purpose specific products have been developed in pre-loaded whitening trays designed to fit over and around brackets and wires, with clinical efficacy proven. Objective: The objective of this study was to evaluate, through spectrophotometric reflectance, the effectiveness of dental blea - ching under orthodontic bracket. Material and methods: Thirty-two bovine incisors crown blocks of 8 mm x 8 mm height lengths…
EPR DOSIMETRY IN A MIXED NEUTRON AND GAMMA RADIATION FIELD
2004
Suitability of Electron Paramagnetic Resonance (EPR) spectroscopy for criticality dosimetry was evaluated for tooth enamel, mannose and alanine pellets during the 'international intercomparison of criticality dosimetry techniques' at the SILENE reactor held in Valduc in June 2002, France. These three materials were irradiated in neutron and gamma-ray fields of various relative intensities and spectral distributions in order to evaluate their neutron sensitivity. The neutron response was found to be around 10% for tooth enamel, 45% for mannose and between 40 and 90% for alanine pellets according their type. According to the IAEA recommendations on the early estimate of criticality accident a…
Community water fluoridation and caries prevention: a critical review.
2006
The aim of this paper was to critically review the current role of community water fluoridation in preventing dental caries. Original articles and reviews published in English language from January 2001 to June 2006 were selected through MEDLINE database. Other sources were taken from the references of the selected papers. For the past 50 years community water fluoridation has been considered the milestone of caries prevention and as one of the major public health measures of the 20th century. However, it is now accepted that the primary cariostatic action of fluoride occurs after tooth eruption. Moreover, the caries reduction directly attributable to water fluoridation have declined in the…
Determination of crown discoloration and fluorescence induced by different medications used in regenerative endodontic procedures: An ex vivo study
2021
Background Crown discoloration is an undesirable side effect of the use of triple antibiotic paste (TAP) in regenerative endodontic procedures (REPs). The aim of this ex vivo study was to assess the potential for tooth discoloration and induction of fluorescence associated with the use of TAP containing either doxycycline (DOX) or clindamycin (CLIN), and of calcium hydroxide (Ca(OH)2), by spectrophotometric analysis and confocal laser scanning microscopy (CLSM). Material and methods A total of forty single-rooted human teeth extracted by therapeutic indication were used. The root canals were enlarged using the step-back technique up to a K #80 file and were randomly divided into four experi…
The impact of head and neck radiotherapy on the dentine-enamel junction: a systematic review
2019
Background Radiotherapy is widely used in contemporary head and neck cancer treatment protocols. The ability of head and neck radiotherapy (HNRT) to cause direct radiogenic destruction to the teeth is one of the most controversial topics in the field of oral oncology. Therefore, this systematic review aimed to investigate ionising radiation as an independent factor for physical and chemical changes on the dentine-enamel junction (DEJ), a pivotal dental topography for the onset and progression of radiation-related caries (RRC) and enamel delamination. Material and Methods Systematic searches were conducted on three databases: Scopus, MEDLINE (Via PubMed) and Embase (Elsevier). Laboratory stu…
Histological study of human periodontal tissue following biologically oriented preparation technique (BOPT)
2020
Background The aim of this study was to conduct histological analysis of a human tooth resected with the periodontal insertion apparatus intact following treatment using biologically oriented preparation technique (BOPT). Material and methods This descriptive histological dento-periodontal study used an anterior tooth extracted with the surrounding periodontal tissues intact, following prosthetic restoration with BOPT. The sample patient was recruited from among those attending the Department of Dental Medicine at the Faculty of Medicine and Dentistry, University of Valencia (Spain). Eight serial sections of the restored tooth were processed. The relative location and histological character…