Telescopic crown is a construction of two parts: primary and secondary. It is mainly used for fixing removable dentures. The primary part is a cap made of metal. The secondary crown is fixed on the frame of the prosthesis. When connecting two parts, a strong structure is formed. With its help, you can form a strong fastening of prostheses, which at the same time will be easy to remove.
Varieties of telescopic crowns
This mechanism was first tested in Germany at the beginning of the last century. The telescopic crown owes its name to its resemblance to a telescope. Its constituent parts move relative to each other in the same way. For almost a century of history, this design has managed to prove its practicality, ease of use and good aesthetics. Nowadays, telescopic crowns can serve as an excellent alternative for dentures onimplants.
There are two varieties of this design - cylindrical crowns and conical ones. Basically, they differ in appearance. The very first samples of telescopic crowns were made by craftsmen with cylindrical walls. They are characterized by a fairly tight fit. Today, such a design is advisable to use only among patients with absolutely he althy gums.
Telescopic taper crown is an improved version of the cylindrical one. Its main advantage is the absence of the influence of errors that are possible at the manufacturing stage. This design does not allow distortion or jamming during fixation of the prosthesis. The main disadvantage of the improved system is the possibility of detaching the crowns in contact with food.
Advantages of telescopic crowns
What are the benefits of using this design?
- The chewing load is evenly distributed on all teeth and gums.
- No effect on diction and bite.
- Ability to install on implants.
- Long service time.
- Easy to use and maintain.
- Keep your teeth he althy for a long time.
This is not all the advantages of telescopic crowns. Everyone can note for themselves the positive aspects in using the design.
Disadvantages of telescopic crowns
Among the main shortcomings of thisdesigns can be noted for a long period of manufacture and high cost. However, the negative aspects are fully compensated by the advantages of crowns listed above.
Indications for installation
The use of telescopic crowns is advisable in the following cases:
- presence of periodontal disease and loose supporting teeth;
- no financial ability to install implants;
- too few teeth for clasp dentures.
The need to use this design is still determined by the doctor.
Telescopic crowns: manufacturing steps
The production of the design described in the article today is possible in two ways: stamping and casting. The first method is considered the simplest. However, when using casting, it is possible to obtain a more attractive appearance of the product due to processing with modern materials.
Manufacture of telescopic crowns begins with turning the patient's teeth under the inner part of the structure. Then the specialist takes impressions and sends them to the laboratory. There, technicians are already making models based on them and making caps. It is very important to check the parallelism of the walls of the abutment teeth so that the structure fits exactly. After trying on the caps, they form a plaster cast for casting the future model. The outer crown is made taking into account the gap of 0.5-1 mm. Based on the resulting impression, the outer structure is already being made.
Cost and service life
Telescopic crown is considered relatively expensive. Its cost can vary from 5 to 11 thousand rubles. If we talk about complete prosthetics, then the final price will depend on several factors simultaneously (the material used, the number of supporting teeth, etc.). It is impossible to name her exactly.
Clasp prostheses on telescopic crowns are characterized by a short service life - no more than 10 years. To increase it, it is necessary to periodically visit a doctor and control the work of the structure.
