نتایج جستجو برای: human dental enamel

تعداد نتایج: 1787662  

Journal: :Proceedings of the Royal Society of Medicine 1959

2012
Masaki J. Honda Ken-ichiro Hata

Dental scientists are eagerly embracing regenerative medicine using tissue engineering technology. Enamel, one component of teeth, is the hardest tissue in the body. It cannot regenerate by itself, because it is formed by a layer of ameloblasts that is lost by the time the tooth crown has completely formed. Although the enamel is spent during lifetime, it is vulnerable to wear, damage, and deca...

2005
Cristiane Franco Pinto Rogério de Oliveira Vanessa Cavalli Marcelo Giannini

The aim of this study was to evaluate the surface roughness, microhardness and morphology of human enamel exposed to six bleaching agents (at baseline and post-treatment). Human dental enamel samples were obtained from human third molars and randomly divided into seven groups (n = 11): control, Whiteness Perfect 10% carbamide peroxide (10% CP), Colgate Platinum 10% CP, Day White 2Z 7.5% hydroge...

2005
D. C. Umesi Koleoso

Objectives: To determine the prevalence of dental fluorosis and other enamel disorders in the study population, assess the degree of fluorosis, and calculate the average number of teeth affected by different enamel disorders among 12yearold Nigerian children. Methodology: The World Health Organization pathfinder methodology for oral health surveys was employed involving the index age 12 years. ...

2016
Uwe Kierdorf Clare Death Jasmin Hufschmid Carsten Witzel Horst Kierdorf Kornelius Kupczik

Dental fluorosis has recently been diagnosed in wild marsupials inhabiting a high-fluoride area in Victoria, Australia. Information on the histopathology of fluorotic marsupial enamel has thus far not been available. This study analyzed the developmental and post-eruptive defects in fluorotic molar enamel of eastern grey kangaroos (Macropus giganteus) from the same high-fluoride area using ligh...

Journal: :journal of dental research, dental clinics, dental prospects 0
sima shahabi reza fekrazad maryam johari nasim chiniforoush yashar rezaei assistant professor, school of dentistry, tabriz university of medical sciences

background and aims: although dental caries is a preventable disease, it is still common and remains a public health problem. one of the potentially effective preventive measures is laser irradiation. raman spectroscopy is a powerful technique for studying the microcrystalline structure of dental enamel. the study assessed the chemical alterations occurring in enamel irradiated with er:yag or n...

Journal: :Journal of oral science 2010
Bruno R Chrcanovic Mauro H N G Abreu Antônio L N Custódio

Enamel pearls are anatomical structures that can bring about clinical implications if associated with the retention of plaque, in turn resulting in periodontal disease. In an attempt to avoid periodontal disease, the removal and treatment of these enamel pearls, may be a necessity in some circumstances. A total of 45,785 extracted teeth from a human teeth bank were analyzed for the presence of ...

2012
Filiz Yalçın Çakır

Background and Aim: To determine the change in the mineral component of enamel and dentin as well as to evaluate the differences in surface texture of the same dental hard tissues following three office bleaching procedures in vitro. Materials and Methods: Sixty extracted human anterior teeth were used. Thirty teeth were used as enamel samples; the buccal surfaces of the remaining 30 teeth were...

Journal: :journal of dental research, dental clinics, dental prospects 0
parisa salehi associate professor, orthodontic research center, faculty of dentistry, department of orthodontics shiraz, fars, iran hamidreza pakshir full professor, orthodontic research center, faculty of dentistry, department of orthodontics shiraz, fars, iran navid naseri private orthodontist, london dentamed academy ltd, shiraz, fars, iran tahereh baherimoghaddam assistant professor

background and aims. this in vitro study was designed to evaluate the effect of composite resin types and orthodontic debonding pliers on the amount of adhesive remnants and enamel damages using a novel method of measurement. materials and methods. 120 extracted human premolars were randomly divided into four groups (n = 30). the standard edgewise metallic brackets were bonded to the teeth with...

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