Search results for "teeth"
showing 10 items of 229 documents
Periapical surgery of maxillary posterior teeth : A review of the literature
2006
En los últimos años, la cirugía periapical ha evolucionado gracias a la incorporación de avances diagnósticos y técnicos. El objetivo del presente artículo es realizar una revisión bibliográfica de los trabajos publicados sobre cirugía periapical en los dientes antrales; hemos revisado el Medline y las revistas españolas de Odontología desde 1974 hasta el 2003. Comentamos la anatomía del seno maxilar, el diagnóstico de las lesiones periapicales y la relación del seno maxilar con los dientes antrales; también la técnica quirúrgica, sus consideraciones especiales, y el pronóstico de la cirugía periapical en estos dientes. Los trabajos recientes plantean que la proximidad de los dientes antral…
Introduction of a system for choosing and placing the anterior teeth of complete dentures.
2016
Zinc isotope variations in archeological human teeth (Lapa do Santo, Brazil) reveal dietary transitions in childhood and no contamination from gloves
2020
International audience; Zinc (Zn) isotope ratios of dental enamel are a promising tracer for dietary reconstruction in archeology, but its use is still in its infancy. A recent study demonstrated a high risk of Zn contamination from nitrile, and latex gloves used during chemical sample preparation. Here we assess the potential impact of the use of such gloves during enamel sampling on the Zn isotope composition of teeth from a population of early Holocene hunter gatherers from Lapa do Santo, Lagoa Santa, Minas Gerais, Brazil. We first examined the amount of Zn and its isotopic composition released from the gloves used in this study by soaking them in weak nitric acid and water. We compared …
The Possibilities of Using BCI Technology in Biomedical Engineering
2018
The paper presents capabilities of building devices dedicated for persons with heavy mobility dysfunction and indicates the role of interfaces connecting brain with computer (Brain Computer Interface, BCI). Impulses coming from closing eyes, clenching teeth, and tongue movement were proposed as optimal in controlling the applications that manage executable systems. A group of electrodes giving a strong electric signal characteristic for the activity were designated and on the basis of conducted research a proposition of a scientific project concerning building of supporting devices for persons with heavy mobility dysfunction was presented.
Is measurement of the gingival biotype reliable? Agreement among different assessment methods.
2019
Background To determine agreement among the most commonly used methods for assessing the gingival biotype. Material and Methods An electronic survey was sent to a sample of dentists practicing in Spain. The questionnaire was based on the evaluation of 5 cases involving different gingival biotype assessment methods. Dentists were required to classify the cases as having a “thin”, “thick” or “not able to classify” biotype. Each case was assessed using a frontal intraoral photo of the anterior teeth; an enlarged photo of the buccal aspect of the tooth with a periodontal probe inserted inside the sulcus; and the real thickness measured in mm with a calibrated needle. Agreement among the classif…
Morphometric Discriminant Analysis of isolated chondrichthyan scales for palaeoecological inferences: the Middle Triassic of the Iberian Chain (Spain…
2014
[EN] Palaeontological studies on exosqueletal disarticulated remains of chondrichthyans have focused on teeth and only less interest has been paid to scales due their limited taxonomic and systematic significance. However, classical works linking the morphology and the function of the squamation in extant sharks suggest that, despite their limited taxonomic value, the study of isolated scales can be a useful tool for palaeoenvironmental and palaeoecological inferences. Following this idea, we have analyzed the fossil record of shark scales from two Middle Triassic sections of the Iberian Chain (Spain), identifying different functional types by means of a morphometric discriminant analysis. …
Particulated wisdom teeth as an autologous bone substitute for grafting/filling material in bone defects : case Report
2020
Introduction Bone augmentation material using permanent teeth are confirmed in many articles to provide good histological and clinical results. Advances in osteoconduction and osteoinduction, low cost of material, no risk of disease transmission and elimination of foreign body reaction are important aspects not only to the clinician but to patient as well. Many techniques and devices to obtain graft material for bone augmentation out of teeth are found in the literature. Material and Methods The wisdom teeth crush technique developed in our office and described in this case report is simple and no specific devices for teeth grinding were used. The graft material was obtained from impacted i…
El humo del tabaco y su asociación con la caries dental en niños y niñas de 10 a 15 años atendidos en la unidad de odontología del departamento 9 de …
2011
Fundamentos: Recientemente se ha destacado el papel de la exposición al humo del tabaco ambiental en la etiología de la caries dental. El objetivo del trabajo es valorar la asociación entre la inhalación del humo del tabaco ambiental y la experiencia de caries en niños de entre 10 y 15 años. Métodos: Estudio descriptivo transversal, realizado en la Unidad de Odontología de Atención Primaria del Departamento 9 de Salud de la Comunidad Valenciana. Se seleccionó una muestra aleatoria de 380 niños. Se realizó una exploración clínica a cada uno y se les entregó un cuestionario de opinión y contacto con el humo del tabaco para cumplimentar de forma autoadministrada. Se determinó: índice CAOD, índ…
Premolars restored with posts of different materials: fatigue analysis
2011
Previous works studied the effect of the material and the dimensions of the post on the biomechanical performance (fracture strength and stress distribution) of restored teeth, under static loads. The aim of this work was to study the effect of the post material (glass fibre and stainless steel) on restored teeth, which have the final crown, under dynamic conditions. The use of a biomechanical model, including a fatigue analysis from FEA, is presented as a powerful method to study the effect of the material of the intraradicular post. The inclusion of the fatigue analysis allows for a more realistic study that takes into account the dynamic nature of masticatory forces. At the same time, th…
Odontomas are associated with impacted permanent teeth in orthodontic patients
2019
Background Odontomas are the most frequent odontogenic tumors in the oral cavity and can result in failure of eruption of permanent teeth or be associated with impacted teeth. Material and Methods The present study evaluated the prevalence of complex and compound odontomas in non-syndromic patients prior to the onset of orthodontic treatment. Panoramic radiographs of 4,267 non-syndromic patients were evaluated; 22 cases were included being 54.5% complex and 45.4% compound odontomas. Results The sample was composed predominantly by White males with mean age of 14.5 years. Complex odontomas were commonly found in the maxilla (83.3%) while compound type was mostly located on mandible (60%), pr…