Search results for "Dental cast"
showing 5 items of 5 documents
Effect of alloy type and casting technique on the fracture strength of implant-cemented structures.
2010
Objectives: To evaluate the influence of alloy type and casting procedure on the fracture strength (FS) of metallic frameworks for implant-supported fixed prostheses. Study design: Thirty three-unit structures for lower posterior bridges were waxed-up and randomly assigned to two groups (n=15) according to alloy type and casting technique: Group 1 (C): cobalt-chromium cast in a centrifugal machine (TS1, Degussa-Hüls); Group 2 (T): titanium cast in a pressure-differential device (Cyclarc II, Morita). Each structure was cemented onto two prefabricated abutments under a constant seating pressure. After 6 months of water aging, samples were loaded in a static universal testing machine (EFH/5/FR…
Digital diagnosis records in orthodontics. An overview.
2006
Actualmente la tecnología digital es una realidad que cada vez se impone más en todos los ámbitos clínicos y, por tanto, existe una incorporación también de los ortodoncistas a la digitalización de los registros ortodóncicos diagnósticos. En este trabajo queremos hacer una valoración sobre las ventajas y desventajas, del uso de la radiografía digital, la fotografía digital así como de la última incorporación, los modelos de estudio digitalizados. Basados en encuestas previas, mostraremos la situación actual en nuestro país en cuanto al número de profesionales que utilizan estos registros digitales de manera sistemática. Digital technology is becoming day by day a more important procedure in…
Tooth size changes with age in a Spanish population: Percentile tables
2010
Objectives: The aims of this work were: firstly, to draw up tables of percentile tooth sizes similar to those of Sanin and Savara for three age groups of a Spanish population; secondly, to describe changes in tooth size between those groups over time, as well as observing any sexual dimorphism and, finally, to compare both the Spanish and Sanin and Savara's American population samples. Material and methods: The sample included 359 patients and was divided into three age groups: adolescents, young adults and adults, of both genders. After dental cast digitalization, mesiodistal tooth-size was measured on each dental cast using a digital method. Dental size tables organized by percentiles for…
Ortodontiskās ārstēšanas nepieciešamības indeksa (IONT) izmantošana minētajiem Latvijas iedzīvotājiem
2020
Priekšvēsture: Ortodontiskos indeksus visā pasaulē izmanto, lai noteiktu pacientu ortodontisko stāvokli. Visā pasaulē netiek izmantots vienots standarts. Viens no populārākajiem ortodontiskajiem indeksiem ir ortodontiskās ārstēšanas nepieciešamības indekss (IOTN) un Engla klasifikācija (Han & Davidson, 2001).Ortodontiskie indeksi palīdz noteikt nepareizu sakodienu un nosaka pacienta ortodontisko stāvokli. Tas nozīmē, ka ārstēšanā prioritāte tiek piešķirta tiem, kam tā vispirms nepieciešama, un tas palīdz pamatoti un taisnīgi sadalīt resursus (Tang, 1993).Papildus šiem aspektiem, kas saistīti ar cilvēku nepareiza sakodiena izvērtējumu, tie palīdz arī iz…
New, fast, and accurate procedure to calibrate a 2-dimensional digital measurement method.
2005
Traditionally, dental casts have been measured by hand, with conventional calipers. Today, several digital methods are available for automatically measuring tooth size, but their accuracy depends on proper calibration. The purpose of this article is to introduce a fast and accurate procedure to calibrate a previously introduced 2-dimensional computerized system of measuring mesiodistal tooth size and calculating overall and anterior Bolton ratios. In this calibration method, the cast is digitized while sitting on a sheet of graph paper. The magnification of the paper in 2 axes can be easily calculated and hence the magnification of the dental cast digital image.