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Removal prostheses consist of interchangeable constructions. This includes these that are not so often taken down, such are precise prostheses, put on support-bearing elements (joints). This type of treatment dentists apply when dealing with semiconstrained distal problems и – missing back teeth or situations of big loss of teeth.
Stages of production: preliminary anatomic imprint of silicone moulded individual spoon;this procedure helps finding the correct functional imprint; test with arranged teeth; forwarding of construction; adjusting controls(if needed).
The most simple constructions – they are placed by hooks, and their body is gum colored. Very suitable for quick restoration – missing front tooth, extraction of numerous damaged teeth. They have high social value because of their low cost. Disadvantages: not very good suction(slight sinking) – this is because of the hooks, which are unable to cope with digestive movements and following micro movements, destroying the bone and parodont slowly; visibility of the hooks; big plate which makes speaking difficult and reduce sensitivity; etc. This leads to loosen prostheses that must be adjusted or replaced. Must be cleaned daily.
Modern constructions, in which the base structure is made of metal, which is thinner than plastic plate. This method is very precise, because this structure and hooks also are cast as exact replicas of a wax model. They fit perfectly to gums and teeth and are almost fully fixed while eating. Because of the durability of the base structure, parts are extremely reduced and allow comfort, improve speaking and sensitivity. They do not loosen with time and can be cleaned less often because they retain less food particles. Their metal part can be made of white alloy. Most important part of these constrictions is durability of supporting hook teeth. Only relative disadvantage is the possibility of not so great aesthetic look in cases of visible hooks. These dental prostheses require perfect patient”s oral hygiene, because every single tooth is interdependent with the full treatment. Sometimes special equipment of prophylaxis is needed.
he structure of these constructions is same as the mentioned before, simply more reduced. Contrast is in the type of bearing to support teeth. Stages of production: preparing support teeth, imprint of them and prostheses area. determining of bite by wax axel; forwarding bridge-support with the prostheses to be modeled, controllers.
They look like door hinge, using teflon mediator. With these constructions, movement is natural and many patients believe they are natural teeth. They depend highly on the condition of supporting teeth, which are placed in block-bridge, with joints at both ends. Can be placed on the first tooth of the prostheses, but most importantly is that they are invisible. Almost all the load is controlled by supporting teeth instead of gums and bones. Rarely taken down.
There is a bridge between 2 opposite teeth single and double sided
On top of grinded teeth are placed metal caps and the prostheses have a metal-ceramic like crowns, which rest on these caps with extreme precision which keeps them intact.
Parts that are close to the prostheses undergo milling and it takes its place in already made beds with responsive surfaces.
These prostheses require perfect oral hygiene, because lack of one leads to high risk of treatment failure, that is why it is dentist”s duty to prepare patients from the very beginning for responsible care after finishing treatment; it is dentist”s call to alter treatment plans if it is impossible for patients to follow up. Following these dental regulations, long lifespan, functionality and durability are guaranteed, because of its precision.
These are constructions that are placed in cases of all teeth losses. They depend on totally different means of bearing – it is an effect of vacuum pressure and suction combined with exact match of dental plates with cheeks and tongue. They are produced in pink or colorless plastic and teeth. Production stages require high precision, because this method lacks vertical and horizontal components of patient”s bite, and also altered looks. All these and other changes must be restored, which requires precision performed by dentists and patience by patient. It takes some time for the mouth, muscles and joints to get accustomed to the new condition. In the adaptation process of this treatment huge role plays patient”s psyche.
These denture/prostheses abilities to stay in place improves significantly by implants or root remains, which are used for support. That way these constructions transforms from total to subtotal.
Stages of manufacturing : 1. preliminary imprint of model which helps making the individual spoon, used for accurate functional imprint 2. functional imprint with registering anatomic structures while chewing 3. determining bite by the help of wax axle. 4. test of positioned teeth on wax. 5. forwarding of the denture 6. control adjustments.