Partly movable prosthesis (biugel prosthesis) are a kind of movable prosthesis, the basis of which (the part which is the background for artificial teeth and other auxiliary elements providing fixation, i. clammers, foot and so on) is predominantly metal, which makes it possible for the whole size of the prosthesis to be made small.
The basis of the biugel prosthesis of the lower jaw is a tiny metal arrow, which unites the saddle-shaped parts and provides the equal distribution of chewing pressure.
The indication for the biugel prosthesis is the partial adentia. The teeth survived which should be used as basis providing fixation must be in a good state, otherwise, the application of biugel is contradicted, because in a very short period of time not full basis might become subject to removing.
Biugels in mouth cavity can be fixed to clammers (metal foot) by clutters and telescopic dental crown.
Clammer variant is used when the teeth survived have enough length (when the dental crown is not short), and have a well expressed anatomic appearance (well expressed equator), as well as in the case if there is a need to shell the teeth survived, which move slightly (on this case polytied clammers, which shell the moving tooth.)This kind of biugels are called shelling clammers.
The privileges are that the basing tooth are usually not hewed and are never exposed to a large overloading.
The disadvantages are that in frontal area metal clammers are seen which could provoke aesthetic problems.
The telescopic system is used when the anatomical appearance of the tooth is not complete, the height is short, and in the cases when there is a risk, that by time (2-3 years), it will be subjected to removing. This system consists of 2 parts- of metal “cap” (the inner part) which is always fixed to the teeth hewed and of the artificial dental crown, which is fixed to the prosthesis basis (outer part). The metal “cap” is a roll-shaped construction which implements the role of a fixator for basic construction (the buigel prosthesis in this case), and can also be called frontal crown. The second crown (the artificial crown which is fixed to the basis of the basic construction) is made fully adjusted to the second crown, so that it is possible to disturb only in the case of vertical movement of the prosthesis, while forcing some pressure.
The advantage of this system is that a wonderful aesthetic result as well as firm prosthesis fixation can be achieved.
The disadvantage is the necessity to hew the basic teeth.
The lock systems (atasments) are used when the basic teeth have enough height and are healthy (the paradont is not infected, there is no move. When the lock system is applied the basic teeth are covered by artificial dental crowns, which provide the background for lock constituents. The reverse parts of those constituents are on the prosthesis, and in result of their combination a tight constipation occurs.
The advantages of this system are considered the high aesthetics, as in the combination of the two constituents of the lock they are not seen, and the fixation firmness is also high.
The disadvantage is the necessity of hewing the basic teeth, as well as the fact, that as the prosthesis is being used, some constituents of the lock are worn out which can lead to the weakening of the fixation. In spite of all this the used constituent (the matrix i.e. the plastic tin in the case of atasment lock) is subjected to restoration in the conditions of technical laboratory, after which the lock acquires its primary firmness. There are also such kinds of lock systems, which do not have wearing out elements in their constituents (MK1).
Independent of the circumstances which variant is chosen for you, one should bear in mind of attending the orthopedist to check the functional wholeness of the prosthesis, and to make the respective corrections.