WO2018037144A1

WO2018037144A1 - Implant-supported angular dental prosthesis

Info

Publication number: WO2018037144A1
Application number: PCT/ES2017/070573
Authority: WO
Inventors: Pedro PEÑALVER OLVERA; Andrea Irastorza Mugica
Original assignee: Promedent Cad-Cam, S.L.U.
Priority date: 2016-08-24
Filing date: 2017-08-08
Publication date: 2018-03-01
Also published as: ES2585733B1; ES2585733A1

Abstract

The invention relates to an implant-supported angular dental prosthesis which can be fixed to a dental implant by means of a screw and comprises: an inner tube (1) comprising a first section (1.1) through which the screw can be inserted into an internal part of the dental prosthesis; a second section (1.2) with a seat (2) for seating the screw in a position for fixing the dental prosthesis to the dental implant; and an elbow (1.3) that defines a slope between the first section (1.1) and the second section (1.2). The tube (1) also comprises an increase in the cross-section according to a longitudinal extension determined in a zone joining the first section (1.1) and the second section (1.2), the increase in the cross-section being according to a complete outline of the tube (1). The increase in the cross-section defines a volumetric space in the form of a chamber (3) in the tube (1).

Description

DESCRIPTION

ANGULAR DENTAL PROTESIS I M TOSOPORTED PLAN Technical sector

The present invention is related to the industry dedicated to dental prostheses, and more specifically to the industry dedicated to angular dental prostheses intended to be supported in dental implants.

State of the art

It is currently known that sometimes bone wear occurs in alveolar bones that make it impossible to place dentures in areas affected by such wear. In order to counteract limitations derived from these bone wear in a conventional manner, angular dental prostheses are used to be supported in dental implants, that is to say commonly called implanted supports.

These angular dental prostheses have an inner duct through which a screw is intraduced to an arrangement in which it is screwed into a dental implant. The inner duct, commonly referred to as "chimney", consists of two sections angled to each other, including one of these two sections a narrowing for setting the screw in the fixation position of the prosthesis to the dental implant by screwing the screw into said implant.

There is a wide variety in terms of screws, according to different lengths and diameters, both of their heads and their threaded stems. This aspect usually causes that the screws cannot be introduced by the chimney until their proper settlement in the narrowing.

Faced with this situation, a manual machining of the dental prosthesis is currently carried out through the use of a micromotor and a milling cutter. With this machining material is torn inside the dental prosthesis to, in particular in each case, allow the corresponding screw to pass through the chimney. This solution, therefore, entails an increase in the total manufacturing time of the dental prosthesis, as well as a risk of suffering structural damage that results in an inability to use the dental prosthesis.

In view of the important described disadvantage presented by the implant-supported angular dental prostheses at present, it is evident that a solution is necessary, at least, against the blockage of the screws in their passage through the chimneys that prevents being screwed into the dental implants .

Object of the Invention The present invention relates to an implant-supported angular dental prosthesis that solves the described technical problem, in addition to providing additional advantages that can be derived later.

The implant-supported angular dental prosthesis, which is fixable by means of a screw to a dental implant, comprises an inner duct which comprises a first section through which the screw is intraduced to an internal part of the dental prosthesis; a second section with a seat for setting the screw in the position of fixing the dental prosthesis to the dental implant; and an elbow that defines an angulation between the first section and the second section.

The conduit additionally comprises an increase in cross-section according to a certain longitudinal extension thereof in a junction zone of the first section and the second section, the increase in cross-section being according to a complete contour of the conduit. In this way, increasing the cross section defines a volumetric space as a chamber in the duct.

Said increase in the cross-section entails, therefore, an area of the cross-section of a portion of the conduit corresponding to the chamber, greater than in the rest of the conduit, that is to say greater than in the first section and that in the second section.

The arrangement of said chamber allows the passage of any conventional screw through the chimney elbow to the fixing position by providing a freedom of movement of 360 ⁰ to the screws. For given dimensions of the dentures, the chamber optimizes the lack of material inside them so that a smaller oversizing of the chimney is assumed assuming a structural weakening clearly inferior.

Also, by means of the camera arrangement, easy manipulation of the screws is allowed to carry out their screwing in the corresponding dental implant, which is especially relevant when the screws have a head intended to be wrapped by a tool for handling.

The dental prosthesis object of the present invention avoids the need to carry out subsequent machining after obtaining it according to each of the screws to be used in each case.

The chamber is located in correspondence with the inner duct elbow, or between said elbow and the screw seat to be used in fixing the implant-supported angular dental prosthesis to the corresponding dental implant. Additionally or alternatively, the chamber has a preferably concave wall, which facilitates its obtaining, also offering greater structural strength.

Description of the figures Figure 1 shows a schematic view of an implant-supported angular dental prosthesis object of the present invention, according to an exemplary embodiment.

Figure 2 shows a schematic view of the implant-supported angular dental prosthesis object of the present invention, according to another embodiment.

Detailed description of the invention

The present invention relates to an implant-supported angular dental prosthesis, which comprises an inner duct (1) to allow its fixation. The duct (1), also commonly referred to as "chimney", has a longitudinal extension that is developed internally by the dental prosthesis and a cross section with a variable area depending on different points along its longitudinal extension.

This conduit (1) comprises a first section (1.1) and a second section (1.2), in addition to an elbow (1.3) to define an inclination or angulation between said first section (1.1) and said second section (1.2). Preferably both sections (1.1, 1.2) are straight. The inclination is determined by central longitudinal axes corresponding to both sections (1.1, 1.2). Preferably, the inclination corresponds to an angle of a value between 5 ^and 35 °

The first section (1.1) is arranged for insertion of a screw into the dental prosthesis by an occlusal face thereof. Preferably, the cross-sectional area of the conduit (1) in the first section (1.1) is equal to or greater than in the second section (1.2) in its part closest to the first section (1.1), that is to say in the previous part to a narrowing according to the direction of movement of the screw to be screwed into the dental implant. The cross section in the first section (1.1) can be defined according to a circular or oval shape to facilitate manipulation of the screw by means of tools.

The second section (1.2) has the narrowing or reduction of the cross-sectional area defining a seat (2) for settlement or support of the screw, and more specifically of the screw head, for by screwing it into a dental implant to fix the dental prosthesis to said implant. Both the screw and the dental implant are not the subject of the present invention. The conduit (1) additionally comprises an increase in the cross section along the same, said increase being given along a given length or longitudinal extension. This determined extension of the duct (1) is preferably equal to or less than 10 millimeters, and more preferably equal to or less than 5 millimeters. The widening of the duct (1) obtained is located in a junction zone of the first section (1.1) and the second section (1.2) with each other, that is to say in an area located between both sections (1.1, 1.2).

The cross-sectional area of the duct (1) in the widening is at least larger than in the second section (1.2). The increase in the cross-section is according to a complete contour of the conduit (1), that is to say 360 °, with respect to the parts of the conduit (1) located immediately on each side, as can be seen in figures 1 and 2. In this way a volumetric space is defined as a chamber (3) in the duct (1). This configuration allows and / or facilitates, among other aspects, the use of tools for manipulating the screws so that it is screwed into the dental implants, even when the screws have the head intended to be wrapped by the tool corresponding for handling.

Preferably, the chamber (3) is defined by a concave perimeter wall according to the longitudinal extension of the duct (1), as can be seen in Figures 1 and 2. This configuration allows the chamber (3) to be obtained, structurally weakening to a lesser extent. the dental prosthesis that according to other geometric forms.

According to a first embodiment shown in Figure 1, the chamber (3) is located in a posterior part to the elbow (1.3) according to the path followed by the screw to settle in the seat (2) after passing through the first section (1.1), that is between the elbow (1.3) and the seat (2). According to a second embodiment, which is appreciable in Figure 2, the chamber (3) is located in correspondence with the elbow (1.3), that is, the chamber (3) additionally defines the angulation between the first section (1.1) and the second section (1.2).

In both embodiments, the chamber (3) optimizes the lack of material inside the dental prostheses in a way that implies a smaller oversize of the chimney as a whole, and therefore a lower structural weakening of the dental prosthesis. Also, flexibility is provided in the passage of the screws through the chimneys, as well as in their handling.

Claims

1.- Implant-supported angular dental prosthesis, which can be fixed by means of a screw to a dental implant, which includes:

- an inner duct (1) comprising:

or a first section (1.1) through which the screw is introduced to an internal part of the dental prosthesis;

or a second section (1.2) with a seat (2) for setting the screw in the position of fixing the dental prosthesis to the dental implant; Y

or an elbow (1.3) defining an inclination between the first section (1.1) and the second section (1.2);

characterized in that the conduit (1) additionally comprises:

- an increase in cross-section according to a certain longitudinal extension in a junction zone of the first section (1.1) and the second section (1.2), the increase of the cross section being according to a complete contour of the conduit (1) ;

such that the increase in the cross section defines a volumetric space as a chamber (3) in the duct (1).

2. An implant-supported angular dental prosthesis according to claim 1, characterized in that the chamber (3) is located in correspondence with the elbow (1.3).

3. - Implant-implanted angular dental prosthesis according to claim 1, characterized in that the chamber (3) is located between the elbow (1.3) and the seat (2).

4. - Implant-implanted angular dental prosthesis according to any one of claims 1 to 3, characterized in that the chamber (3) has a concave wall.

5. - Implant-implanted angular dental prosthesis according to any one of claims 1 to 4, characterized in that the longitudinal extension is equal to or less than 10 millimeters.

6. - Implant-implanted angular dental prosthesis according to claim 5, characterized in that the longitudinal extension is equal to or less than 5 millimeters.