Well, dear reader, and the patient, here we come to the results of your bad attitude to your teeth. Let’s talk about prosthetics in dentistry. Actually, I like the expression "orthopedic treatment", i.e. treatment with dentures.
To my great joy, there are still patients who have no idea about what a dental crown.
At the same time, many patients often insist on such prostheses that simply banned in prosthetic dentistry, in many cases, there is no way to avoid a removable prosthesis, sometimes in order to reduce the cost of construction and at the same time ensure the strength necessary to produce cosmetic dentures with metal crowns. So, let's talk about different types of prostheses.
The group micro prosthetics include tabs pin teeth and single crowns.
Post is actually a seal, made in dental laboratory of metal, porcelain, ceramic metal or plastic and then placed in a cavity formed in the treatment of dental caries. Rarely, but used. Quite often, the posts are part of the bridge, and serve as a support instead of the crown.
Crown - a cap worn on specially treated tooth in order to restore the tooth shape, ensuring its strength, or as an element of the bridge. Crowns made of metal (stamped, cast, soldered), plastic, porcelain, ceramic metal (in this case, the inner layer is made of metal, and the outer - porcelain).
A pin tooth - an artificial tooth is fixed in a suitable for this root of the tooth using a pin cemented in the root canal. As the crown, the pin can be manufactured tooth different ways. He can be used as an element of the bridge.
Bridges - is hanging constructions resembling bridges, which are attached to the teeth using crowns, pins, tabs, and overlays. They can be made of the same materials and the same technology as the crown. A distinctive feature is the presence of an intermediate portion in the form of artificial teeth. An intermediate portion forms a narrow flushing space between the gums in order to prevent inflammation beneath the prosthesis. The magnitude of a bridge depends on the magnitude of the defect bridged, and the conditions in the oral cavity. When loosening the abutment teeth the number of teeth included in the boundaries of the prosthesis increases. Kind of bridges are called cantilever prostheses, i.e. bridges with no end support. In such prostheses in the form of an intermediate portion of the artificial tooth as it is suspended on the end of the prosthesis. Relating to such prostheses must be extremely careful, and in the lateral parts of the dentition they generally should not be used due to the dangers arising in relation to the supporting teeth. Occasionally bridges are made on the retaining posts (support-retention clasps). Such prostheses can be removed.
A removable denture is a prosthesis replacing usually large dental defects that cannot be replaced by bridges. Sometimes removable prosthesis is made as temporary. Removable dentures are divided into 2 groups: the plate and plate with clasps. Plate prosthesis is made, usually made of plastic, artificial teeth such as dentures can be plastic (often), porcelain, and even metal (very rarely). The plate basis of this prosthesis covers a significant portion of the palate; the mucous membrane of the alveolar bone is located in the space between the tongue and jaw.
Complete removable dentures retained by means of adhesion (lower jaw) and functional suction (at the top). Clasp dentures - kind of partial dentures, which are a major part of the cast metal (clasp) running on the palate or under the tongue and connecting the two bases with artificial teeth located in the dentition defects. Clasp dentures can have a large number of elements, including - splinting (with periodontitis and periodontal disease). Fixing them to the teeth can be as clasps, and other elements that allow achieving good functional and cosmetic results. The disadvantage of these prostheses should include their relatively high cost.
Prosthetics --stage process that requires repeat visits, because the technology prosthetic requires a certain time for each step. Modern materials and technologies make it possible to one day carry several stages, so the time of manufacture of prostheses are now greatly reduced and depend mainly on the type of prosthesis. Always precedes the removable prosthesis non removable, as a second step.
It should be remembered that, as a rule, begin to prosthetics should not earlier than 2 weeks after the removal of the last of the retreating teeth. However, sometimes the method of Immediate prosthetics, with high precision when a prefabricated prosthesis is fixed in the mouth of the patient immediately after the removal of (often multiple) teeth is needed. Personally, I like this method, because such patients are accustomed to better prostheses. But the method is complex, requires courage and patience from the patient and the accuracy of the doctor.
When it is necessary prosthetic? I sincerely believe that it is necessary to replace each lost tooth permanent dentition, regardless of age. The fact that after the removal of the tooth (teeth) in the oral cavity of secondary processes the deformation of the existing teeth starting. Under the action of the unbalanced force stresses teeth tilt, rotate, move towards the defect to form gaps between the teeth. Unopposed antagonist (standing in front of the tooth), teeth begin to grow, as it were, going outside your dentition. Almost always accompanied by such vertical displacement and deformation of the alveolar bone, and it comes down to the fact that the crown begins to touch the opposing gums; a so-called lock, even restricting movement of the lower jaw, for example, ahead.
Prosthetics with such defects requires the prior and long-term treatment. My advice: never in such cases do not settle for simple methods of orthopedic treatment, go to the other institutions, consult several specialists and then come to a decision.
How to choose the design of the prosthesis? The choice of non-removable prosthesis designs has enormous influence on your financial opportunities. Equally important are the specific conditions of the patient's mouth. For example, at very low tooth crowns in the sides of the dentition produce sintered prosthesis is practically impossible - it is necessary to remove at least 1.5 mm in the height of the tooth crown. But in cases of pathological abrasion of teeth when the teeth are shortened, but there is a need to increase the height of bite - these prostheses are possible. The important thing - between you and your doctor should be a relationship of cooperation and trust.
So ... Do you often ask the question of why all the teeth are processed under the crown?
You see, our teeth are barrel-shaped due to the presence of the equator. In order to accurately match the edge of the crown of the tooth neck, it is necessary to turn the cylinder or the plug; otherwise the bit is simply not able to overcome its edge corresponding to the neck of the tooth, the widest part of the tooth, which is the equator. Moreover, in prosthetics plastic, solid rubber, metal-ceramic, metal-prostheses want to create ledges in the necks of the teeth, since the thickness of veneered crowns reaches 1-1.5 mm (this is just one of the reasons for such a massive processing). That's it.
However, there are exceptions to the rule, when the teeth under the support of the crown are not grinded. But these are rare exceptions to the rule, so try not to dwell on it, or do not get out of arguments.