c- Filling of pulp chamber The criteria of the central part of the endocrown extending into the pulp chamber area are not well defined. Whether there is ideal length and shape of this extension and whether it influences the strength and the retention of the whole restoration have not yet been established. According to some authors, the pulp chamber space can be managed differently and a composite build-up of this space has been suggested. (62; 67) Regardless of its composition, this resin composite base may help in preserving more sound tooth structure by filling cavity undercuts. Moreover, this build up leads to the fabrication of endocrowns with shorter extensions into the pulp chamber, resulting in fabrication of endocrowns with reduced thickness. This will lead to a better light penetration through …show more content…
GI bases may reduce the risk of cusp fracture during the time between cavity preparation and the insertion of final restoration. It was concluded that in non-vital teeth it seems that there was no need to fill the whole pulp chamber with a ceramic core, provided adequate tooth structure remained but long-term observation periods are needed to prove that in the clinical outcome. In some in vitro studies, fiber-reinforced composites (FRCs) have been also employed to reinforce cusp- replacing restorations. (69; 70; 71) Besides improving the strength of the restoration, results of these studies demonstrate that the incorporation of glass fibers into composite resin materials usually leads to more favorable fracture patterns above the CEJ because the fiber layer acts as a stress breaker and stops the crack propagation. Furthermore, and especially for endodontically treated teeth, this composite base reinforces cavity walls during the temporary phase.
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.
Pit and fissure sealants are tooth coloured materials that are applied on the occlusal surfaces of the posterior teeth in deep grooves, pits and fissures. They protect the tooth from various bacterial plaques in these caries prone areas of the teeth. The sealants protect these areas by sealing of the entrance to bacteria which give rise to dental caries in susceptible individuals especially in children. Pit and fissure sealants are now commonly being used due to the increase in the awareness among public about dental caries prevention
Tooth surfaces are referred to by various names in dentistry, including mesial, distal, buccal, and lingual. If you drew a midline t...
Ceramics are most commonly used in dental applications as restorative materials for crowns, cements and dentures.
Dr. Gary Silva and his team are highly trained and experienced in providing restorations for all sorts of dental issues. We offer complete and partial dentures, tooth-colored fillings, crowns, bridges, and more. Dr. Silva’s unique background gave him real restorative experience early in his career. For more than 20 years, Dr. Silva has been offering patients the chance to gain a beautiful, functional smile with his restorative dentistry.
The biggest shortcoming of these archaic appliances was the fact that they were subject to decay in the wearer’s mouth. Thus, installed false teeth would have to be replaced on a regular basis, resulting in a very costly procedure. However, this problem was rectified in 1774 by Duchateau and Dubois de Chemant with their invention of the first full set of dentures that would not rot. This was due to their porcelain composition – a material that was much more conducive to the everyday wear and tear of one’s teeth. Although an incredible improvement, even the porcelain version had its difficulties. Unable to produce anything less than a full set of teeth (the surrounding porcelain was required to keep each tooth in place), patients who were missing only one or two teeth were out of luck, unless they were willing to have the rest of their teeth removed as well. And yet, in 1808, Giuseppangelo Fonzi developed the first individual appliance – a single porcelain tooth that could be held in place by a pin drilled into the jawbone. Finally, in 1845, Claudius Ash, known as the official “inventor of dentures”, produced the porcelain version that is now used today. His contributions included a suction method of adhesion for a full set of dentures, so that no form of attachment could be seen by an onlooker.
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
...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.
Abnormal wear of tooth surfaces was an orthodontic problem early on, even ancient people wanted straight teeth! To close gaps, it has been construed that catgut did the work now done by today’s orthodontic wire. In 400-500 BC, Hippocrates and Aristotle both ruminated about ways to level teeth and fix many dental conditions. It should be noted that in Medieval times, expert barbers often performed dental “operations”, extractions, and procedures such as blood-letting. In seventeen twenty-eight, French Dentist Pierre Fauchard published a book called “The Surgeon Dentist” about ways to straighten and align teeth. He used a device called a “Bandeau,” a horse-shaped piece of precious metal which helped...
In 1728, Pierre Fauchard, was well known for publishing a book called, "The Natural History of The Human Teeth". In today’s society dental persons still use many of the procedures that was used during the 17th century. For example, Pierre Fauchard was the man who came up with the process of dental fillings; he also proved that acid come from...
Everyone has teeth, and society likes them to be as white as possible. But does everyone know the parts of the tooth? The tooth has four parts: dental pulp, dentin, enamel, and cementumcentenum. Dental pulp is the center part of the tooth and is made of tissue and nerves. Dentin is connected to the dental pulp and is the second hardest part of the tooth. Enamel is the hard, outer layer that surrounds the tooth. Enamel cannot be repaired or replaced. One can only prevent its loss, which is why we brush our teeth so often to help eliminate the plaque and acids that certain sodas and other sugary drinks try so hard to remove. Without enamel, teeth would erode within days of their coming in. And last but not least, cementumcentenum. CementumCentenum covers the root of the tooth and it anchors the root to the skin.
Endodontics is a subspecialty of dentistry that specifically deals with problems of the tooth pulp. Endodontists specialize in the diagnosis, treatment and prevention of disorders or injuries to the pulp in order to save the tooth. Some of the structures that accompany the tooth pulp include the blood vessels, nerves and soft tissue that traverse
The freshly squeezed citrus juices of Lemon,lime and orange were analysed through titration over the period of 2 weeks. Initially the lime juice was found to be slightly more acidic than the other juices followed by lemon juice and then orange juice since it is known that usually lime is more acidic than lemon and orange. It was hypothesised that the acidity of each juice will increase or decrease after the period of two weeks depending upon the sugar content of that citrus fruit that the juice is extracted from. The acidity of the juice with the highest sugar level will gradually increase over the period of time since sugar contribute to the the fermentation of the citrus juice to lactic acid. The hypothesis was shown to be correct;however
The existence of micro-leakage in dental restorations was first identified in scientific research in 19126. In a study done by Harper (1912), air pressure was used to penetrate the surface between an amalgam restoration and cavity preparation7. By applying pressure through a hole in the pulpal floor, Harper could quantify the amount of pressure needed to establish leakage through the emergence of bubbles from the margins of the restoration. Research has come a long way since Harper first recognized micro-leakage. Adaptations of new materials used when placing composite restorations like BondAband, a light-cured glass-ionomer cement has been shown to reduce marginal micro-leakage in posterior restorations8. A decrease in microleakage has also been shown with the use of an ...
Modern face-bows and articulators are absolutely essential for producing consistently predictable outstanding aesthetic restorations, and they have become extremely accurate and easy to use. the use of new modern face bows made it possible to mount the dental casts of asymmetrical face to reproduce their clinical appearance. The mounted case meets the occlusal and functional demands of the dentist at the same time provides the dental operator with the correct horizontal and vertical orientation. This correct spatial orientation enables the dental operator to visualize and produce the highest-quality aesthetic restoration as possible for the patient comfort. The usage of the face bows facilitates the production of higher-quality