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Dental materials final exam quizlet
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Dental materials are used for a variety of reasons. The basic reason for using dental materials is to restore the tooth back to its original anatomy. Some materials are used more than others but it depends on their characteristics. Composite resin is a type of dental material. Some dental materials do not have the esthetic characteristic that composite resin has. That is why sometimes, it is more favorable than other dental materials. It is one of the most common dental materials that are used to restore a tooth back to its natural appearance.
When it comes to products that are being marketed, there are many different brands that are trying to be sold. It is important for the dentist to know which brand is best for the office. Research can be done online. They can compare the uses, advantages, and cost. The main use for composite resin dental materials is for restoring teeth that has been affected by decay and other damages (know your teeth, 2007). Composite resin is different from other dental materials because it is a white filling. It can be matched to the patient’s natural tooth color so the appearance is not an issue. Patients have the option of choosing between non esthetic and esthetic filling. That is why some patients prefer to have composite resin fillings than other dental materials. It is used for cosmetic purposes as well as fixing the decayed teeth. When the patient has a composite filling done, the dentist will place it on the tooth in layers. Most often, a light is used to harden the material. After the layers are in place and it is auto cured by the light, the dentist uses electronic instruments to reshape the tooth. It is important to shape it back as much as possible to the original tooth structure and anatomy....
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...nt, their financial situation, the structure of the tooth, the area of the tooth being worked on, and the dentist. It is best to choose composite resin for reasons such as small cavities that are towards the front of the mouth. Composite resin dental fillings are becoming more popular; therefore, more dental insurance companies are accepting it as part of their plan.
Bibliography
(2013, December 19). Retrieved from dentalproductsreport.com: dentalproductsreport.com/dental/article/top-10-most-viewed-new-dental-materials-2013?page=0,0
(2014). Retrieved from tphspectra.com: tphspectra.com/using-tph-spectra know your teeth. (2007, march). Retrieved from knowyourteeth.com: knowyourteeth.com
TPH Spectra™ Universal Composite Restorative. (n.d.). Retrieved from smartpractice.com: http://www.smartpractice.com/Apps/WebObjects/SmartPractice.woa/wa/style?id=SDC642800&m=SPD
Composite restoration usage in dentistry is increasing. Because of this interest in the longevity and reliability of composite fillings also is increasing1. One problem that can occur with composite restorations is micro-leakage. This is when microgaps at the tooth-restoration interface allow fluids and bacteria into the restoration2. These gaps are formed when the material is polymerized and shrinks, which causes the material to pull away from the margins of the preporation2. Problems that can arise from micro-leakage are secondary carries, hypersensitivity, pulp stimulation, and marginal discoloration3. This is why dentists are trying to find ways to reduce micro-leakage of composite restorations.
Ceramics are most commonly used in dental applications as restorative materials for crowns, cements and dentures.
Dental composites are widely used for crown preparation and in-lays formation. These materials are similar to those used in direct fillings and are tooth-colored. Their strength and durability is not as high as porcelain or metal restorations and they are more
Its advantages consist of the fact that they bond chemically to teeth, making it much easier to insert. Another advantage is from its constant release of fluoride into the mouth, which in turn reduces the chances of tooth decay. It is also a very good adhesive in the sense that it is very efficient when it comes to permanently cementing crowns, bridges, etc. The disadvantages of glass Ionomer cement fillings are actually a step down from composite fillings. For example, they are not as strong as composite fillings, nor are they less expensive than composite fillings. Another disadvantage is its ability to wear and they are also prone to
Composite materials have become extremely useful and since been adapted for aviation. They have been in development ever since the use of aluminum in the early 1920’s. Composites are components that are mixtures of two or more inorganic or organic compounds. One material acts as a matrix, which is the compound that keeps everything together, while the other material provides a reinforcement, in the form of fibers embedded in the matrix.
...an be seen that composite teeth form a high stability bond than PMMA teeth. This is due to the filler content allowing for low shrinkage, increased wear resistance and better cross-linkage with the base. In overall consensus the technique of heat-curing is believed to achieve significantly more polymer cross-linkage than that of self-curing the acrylic resin PMMA base - giving us a stronger base to teeth interface. It should be noted however that both techniques can be used for denture fabrication to achieve a desired result and it is up to the dentist and the technician to determine which one they prefer however, composite teeth bonded to a heat-cured PMMA base works best. Though the tooth and base by themselves may be strong, if the interface between them is not strong, this will result in the overall denture produced being weak independent of material selection.
A composite material is made by combining two or more materials to give a unique combination of properties. The two constituents are reinforcement and a matrix. There are many types of materials that can be used for reinforced and matrix materials. The choice materials depend more upon required strength to weight ratio, stiffness and application.
Fiber is a threadlike material that can be found in a natural or manmade form. Natural fibers derive from various animals, plants and can even be produced by insects. These fibers have been in use since prehistoric times and are currently produced today. The most common natural fibers used are linen, wool, silk and cotton. They have been woven together to create fabrics for clothing and other items. A natural protein fiber, called wool, was discovered before 10,000 B.C.E. and woven into cloth by 1900 B.C.E. Wool comes from predominantly sheep but is also found in other animals such as, llamas, alpacas, camels and goats. Tribes in North Europe spun wool using a crude spindle, which is a stick with a stone or clay ring connected to the end to make yarn. They also made wool into cloth by weaving the thread in a criss cross style. Some humans 8,000 years ago had domesticated sheep specifically for the production of wool and other uses. In 4,000 B.C.E. the city of Babylon also known as the “Land of Wool”, had bought and sold woolen cloth which was important to their society. Over the years spinning and weaving machines were constantly improved like the spinning jenny built in 1767 with many spindles placed side to side allowing it to operate 120 spindles at once. Weaving wool became more machinery based rather than using the traditional manual weaving (“History of Wool”, n.d.). In order to create the fiber wool, there is a process of cutting the hair from the animal which is usually done manually by shearing specialist. After cutting, the sheared wool is cleaned and brushed to straighten out the fiber strands by hand. The wool is then placed into a carding machine where it goes through many bristled rollers and roved. The carding process separates the wool into small pieces and cooled in spools at the end of the machine. Soon the wool is spun into yarn and woven into cloth. Before this machinery process, many women known as spinsters took on the task of turn wool into cloth manually. Wool is commonly used to create sweater garments and coats for cool weather (“History of Fibers”, n.d.). The Fiber repels water well and fabric feels dry in damp or wet weather. A downside to wearing wool is that it attracts moths and carpet beetles that feed on the fabric.
from petroleum and natural gas. [1] It is a valuable resource that is commonly used in tires,
From the time Buenocore first discovered adhesive dentistry in 1955, there has been continuous development in this field. This innovation has revolutionized restorative dental practice. Today’s direct composite restorations have a number of advantages over other restorative materials. ‘They are aesthetic, timesaving, minimally invasive and biologically compatible. Moreover, they are easy to handle, manipulate, repair and control’ (Dentistry today, 2008). Such mode of treatment not only involves a minimally invasive approach but, with the advent of newer adhesive systems also produces reliable bond strengths to enamel and dentin along with excellent aesthetic outcomes. Moreover, it is believed that a strong adhesion between the tooth and composite interface is necessary to withstand the contraction forces during polymerization of composite resin. Many authors (Pushpa and Suresh 2010; Munck et al. 2005) have stated that an optimum adhesion guarantees long-term retention and
Cosmetic dentistry is a specialized field that deals with improving the aesthetics of teeth and the human face. The teeth are an important part of human beauty. Even minor damage to the teeth, such as breakage or loss can drastically alter the overall appearance of the face. This is where cosmetic dentistry comes in to restore beauty. Cosmetic dentistry has become a highly specialized branch due to various advancements in surgical procedures and diagnostic techniques. Several new materials have also been discovered. These materials are very close to the natural enamel and bone from which teeth are made and are virtually indistinguishable. Cosmetic dentistry is an option in conditions such as teeth loss, gaps between teeth, cracked or chipped teeth, cavities and dental
According to American society for materials (ASM) Handbook, composites can be defined as “a macroscopic combination of two or more distinct material having a recognizable interface between them.” A composite material is made by combining two or more materials to give a unique combination of properties.
Lamination is the technique of manufacturing a material in multiple layers, so that the composite material achieves improved strength, stability, sound insulation, appearance or other properties from the use of differing materials. A laminate is usually permanently assembled by heat, pressure, welding or adhesives.
Magnets are stones that produce magnetic fields. The magnetic field is invisible, but is responsible for the most noticeable aspect of a magnet: the attraction of a metal object or the repulsion of another magnet. Magnets are used in common everyday household items: credit cards, TVs, speakers, motors, and compasses. A magnets strength is measured by its magnetic moment. (“Magnetism”)
There are many commercially produced composites used polymer matrix material. There are many different polymers available depending on the raw ingredients. There are some broad categories, and each with numerous variations. The most common used are known as vinyl, polyester, polypropylene, epoxy, polyimide, and others. The reinforcement m...