LT5460B - Tooth prosthesis system and method for making thereof - Google Patents

Abstract

The invention relates to tooth prosthesis system, which comprises implants, carriers, which are fixed by bolts to implants. A beam for fixing a tooth prosthesis is cemented among and to carriers. For fixing carriers is used cement, which fills a gap between a carrier and a beam, neutralizes constructive unconformity and protects from inside tensity in system. In ends of a beam are made openings for touching bolts. Unscrewing bolts a beam with carriers can be removed.

Description

The present invention relates to the field of dental prosthesis, and more particularly to a breakable dental implant connection beam to which a removable denture is attached.

TECHNICAL LEVEL

Dental implant technology has been known for decades. For a toothless patient, the teeth can be restored with a removable denture. A special girder is used to fix the prosthesis, which is attached to the implants (threaded into the lower and / or maxillary jaw and mounted parallel to the bite plane).

In most cases, this girder is attached directly to the implants, as described, for example, in European patent no. 0210152, or through supports as described in international patent application no. WOOO / 27556.

The main disadvantages of such systems are that when the beam is molded seamlessly with the implant supports, as described in European patent no. 0210152, minor or larger deformations always occur. Attaching such a beam to the implants inevitably results in tension that adversely affects the entire structure and can lead to mechanical and / or biological complications. Some practitioners say that this can affect bone numbness around implants.

In order to reduce these deformations, the beams have to be made of precious metals with less shrinkage. The most common is the use of Au-Pt (auxoplatin) alloy, which results in high system production costs. The removable denture girder mechanism usually has an unalloyed Cr-Co (chromium-cobalt) alloy, which further raises the risk of polymetallism. It can be eliminated by casting the removable prosthetic fastener from a precious metal, but this would further increase the cost of the prosthesis.

International patent application no. In the dental prosthesis system described in WOOO / 27556, the beam is attached to the implants through separate supports. However, this system utilizes two separate fastening bolts per implant and girder attachment axis, making the system more complex and, at the same time, more vulnerable to cyclic loads such as chewing.

The object of the invention is to provide a detachable dental prosthesis system which is simple to implement and does not create tension inside the implant, i.e. the fixation would be passive, at a significantly lower cost than the system currently in use, which would prevent potential polymetallism and last as long as possible.

THE SUBSTANCE OF THE INVENTION

These objects are to realize the dental prosthesis system of the present invention, which consists of implants that are fitted with standard hollow supports bolted to and secured with a girder for securing a removable denture. Those beams that are cemented to the implant support hole have holes that allow access to the screw inside the implant support duct that secures the support to the implant. This design allows, if necessary, to unscrew the implant support bolts and remove the supports together with the cemented beam.

This dental prosthesis system is obtained by screwing the bolts to the implant inserted into the upper and / or lower jaw and, unlike in previous systems, attaching the beam to the supports by cement instead of bolts. Without the use of additional bolts to fasten the beam to the support, the design of the system is simplified. The system utilizes standard titanium supports that clamp to the implant more accurately than individually cast supports and do not cause tension inside the system. The cement used to fix the beam to the supports compensates for possible structural misalignments between the supports and the beam, contributing to the passivity of the entire system. The same Cr-Co alloy was used for both the beam and removable prosthesis, eliminating the risk of polymetallization. Not using precious metal casting significantly reduces the cost of the prosthesis and makes this treatment accessible to many patients.

DESCRIPTION OF THE DRAWING FIGURES

The invention will now be described in more detail with reference to Fig. 1, which is a cross-sectional view of a breakable dental prosthesis system of the present invention.

DESCRIPTION OF THE INVENTION

As can be seen in Fig. 1, the dental prosthesis system of the present invention consists of at least two implants 1, inserted, in this particular embodiment, into the mandible, hollow titanium supports 2, bolted 3 to implants 1, and beams 4 attached from above to the supports. 2. A removable denture (not shown) must be attached to beam 4.

Unlike prior art dental systems, the beam 4 is attached to the supports 2 not by screws but by cement 5 inserted between the upper surfaces of the supports 2 and the lower surfaces of the ends of the beam 2.

At the ends of the beam 4 there are holes 6 through which a special multi-key wrench can be accessed and unscrewed screws 3 if the beam 4 is to be removed.

The dental prosthesis system of the present invention is obtained as follows: When implanted into the jaw, the implants 1 grow to the bone, securing them to the supports 2 by screws 3 inserted through the channel 2 of the support 2. The channel 7 is closed with a silicone correction mass. it would not get cement. In the laboratory, a wax pattern is removed from the tensioned supports 2 by casting a beam 4. It makes holes 6 for access to screws 3 inside the supports 2, if necessary, and attaches the beam 4 to the implant supports 2 while keeping it parallel. to the bite plane. After removing excess cement 5, beams 4 are sealed with a composite seal. When the cement has hardened, the girder 4 is fixed to the denture.

The use of cement to fix the beam to the implant supports provides the following advantages over known dental prosthesis systems: First, the use of additional screws to fix the beam to the implant supports simplifies the design of the entire system. Secondly, bolted joints are known to be exposed to long-term cyclic loads, such as when chewed, and tend to be loosened by replacing some of them with cementitious joints. Third, the cement used to fix the beam to the supports compensates for its mass potential misalignments between the beam and the supports and thus eliminates the prerequisites for internal stresses in the system. The combination of these benefits extends the life of the entire denture system and allows the use of base metals in the manufacture of the beam. The same CrCo alloy was used to make both the beam and removable prosthesis frame, eliminating the risk of polymetallization. Without the use of precious metals, the cost of the system, and thus the dentures, becomes affordable for many patients. The system is easy to service and dismantle: if for any reason it is necessary to remove the beam 4, then remove the composite seal from the hole 6, then remove the silicone mass in the channel 7 and unscrew the bolts 2 3 through the loose channel 7.

DEFINITION OF INVENTION

Claims (2)

DEFINITION OF INVENTION A dental prosthetic system for fixing a denture, comprising implants inserted into the lower and / or maxillary jaws, fixed to the implants, a beam fixed to the supports, characterized in that the beam (4) is fixed to the supports (2) by cement. (5), in addition to the holes (6) provided for accessing the bolts (3) of the supports (2). 2. A method of manufacturing a dental prosthesis system comprising bolting a support to an implant inserted into the upper and / or lower jaw and subsequently attaching the beam to the implant supports, wherein: - making a hole (6) in the beam (4) made of a molded wax model removed from the supports (2), coinciding with the channels (7) of the screws (3), - secures the beam (4) with the cement (5) to the upper surfaces of the supports (2), keeping it parallel to the plane of occlusion, - removes excess cement (5), - seals the openings (6) of the beam (4) with a composite seal.