ES2216692A1 - Expanding dental implant for inserting into bone, has two pieces joined together by thread, cylindrical stem provided with threaded head that is inserted into threaded hole, and outer part connected with rod - Google Patents

Abstract

The implant has two pieces joined together by a thread, and a cylindrical stem (3) provided with a threaded head (4) that is inserted into a threaded hole (5). An outer part (2) is connected with a rod, where the outer part includes a screw (8). A lower end of the screw extends toward a lower end to provide better cutting introduction into a host bone. A hole (15) is formed in a bottom of the outer part for introduction of a mechanical element to secure bone fixation.

Description

Expansive dental implant

Object of the Invention

The expansive dental implant, object of the This invention patent tries to present a new element in the field of bone dental surgery, gathering a series of improvements in its structure that provide it with sufficient properties to overcome the conventional analog systems existing in the market in terms of its implementation.

For this, a cannulated screw is used and internally threaded partially, which will contain internally a second screw that will have an effect expansive in the lower sections of the outer screw. Optionally, the screw can be fixed and not expansive.

Background of the Invention

There are precedents to the present invention since the scope of construction engineering in terms of execution of struts and embedments that use a similar system, to the surgical industry itself in certain prostheses cannulated so that its support, when grafted into bone, depends largely on the internal element that is introduced into the through hole or longitudinal cannula of the prosthesis.

Description of the invention

Through the expansive dental implant, object of The present invention patent provides a series of improvements that alleviate or in their case eliminate all the inconveniences above mentioned.

The first advance that drives the dental implant expansive, happens to have contributed a solution to the particular field of bone surgery in its dental application, where until now This idea has not been integrated as a means of implantation, through which achieves greater anchorage between implant and bone, the osseointegration time decreasing integrally.

The second advance that drives the dental implant expansive, it is based entirely on the physical constitution of the object of the invention, which consists of a threaded screw, with a hole inside it axially, providing said hole  axial of a thread that will house a threaded rod that will remain in the inside the screw after insertion.

The screw is grooved longitudinally with at least two slots of variable length finished in a transversal drill that decreases the stress concentration. Likewise, in that final zone there will be a hole perpendicular to this hole that will allow the insertion of a new mechanical element to guarantee the fixation of the expansive dental implant. Inside the drill effected has a conical lower development so that after Thread said screw into a bone, the rod will be inserted interior so that, expanding the interior taper adapting it to a cylindrical shape, the lower sections are They will expand externally thanks to the allowance of the grooves. By Thus, we obtain that despite threading the screw to the bone, the expanding it will make the lower thread steaks get go deeper into the bone so that its adaptation and support It will be very high. In addition, its non-cylindrical geometry counteracts the torsion forces that destabilize existing implants. Regardless of these improvements, the screw, optionally, It can have a non-expansive variant.

The application of the object of the invention is variable depending on the geometry of the expansive principle in as for the external and internal diameter, number and length of grooves, interior taper and other parameters, will be done in function of the dental bone area in which it is implanted.

Description of the drawings

To complement the description that is being performing, and in order to help a better understanding of the characteristics of the invention, the following report is attached descriptive as an integral part of it, a series of figures in which, for illustrative and non-limiting purposes, represented the following:

Figure 1: Elevation view of the assembly of inner screw on the outer screw before being the first introduced in the second, both being represented screws according to cross section.

Figure 2: External preferred appearance.

Figure 3: Plan view of what it will take the assembly, once the inner screw has been introduced on the outer screw.

Preferred Embodiment of the Invention

Figure 1 shows the set that is will use as an expansive dental implant. The device consists of the inner part (1) and the outer part (2), both with appearance screw

The inner part (1) extends from a threaded cylindrical head (4) inside which has been arranged a hole (5) for support of a screwdriver instrument, whose appearance is observed in greater detail in figure 3.

In Figure 1, the piece (2). Said piece consists of a head (6) equipped superiorly of a hexagonal base (6a) that could be so much internal as external and a cylindrical peripheral zone (6b) which it extends inferiorly along a concave curve (7) to the area threaded (8). Said threaded area (8) and characterized by having thread elements (9) variable in profile depending on the application, with inclined direction of the threading face (9a) of the fillet (9b) with respect to the complementary face (9c) composing between both sides (9a and 9c) an angle (δ) as observed in detail b. In the lower part of the thread (8) you can see that there is a longitudinal recess (10) or milling, complementing other or other identical recesses not represented in their position radial, located at the lower end. The purpose of said recesses (10) is useful when introducing the screw (2) inside the application area.

Inside, said screw (2) has Threading (11) in its upper half, filleting regular triangular (12) as indicated by the detail to, through the threaded (11) the inner part (1), first through by means of the rod (3) that will expand the narrowing (13) bottom not threaded, with the fillets (9b) they will leave introducing with transverse direction in the bone, causing said expansion thanks to a total longitudinal cut (14) in the last threaded section of the outer part (2).

Figure 2 shows the aspect outside of the screw (2) with its visible outer parts. How complement to said figure is given in figure 3 a view in plant of two screws (1) and (2) where the hexagonal piece (6a) internal or external depending on the case, it will serve as blocking means swivel that allows the anchoring of universal additives. Centered is the cylindrical head part (1) (4) equipped with a central groove shape (5) for threading through the inside of the piece (2). At the bottom of the screw there is a hole (15) perpendicular to the axis of the screw whose purpose is allow the introduction of a new mechanical element, improving in this way the anchor of the set.

Once the nature of the present invention, as well as a way of bringing it to the practice, it only remains to be added that said invention can suffer certain variations in form and materials, as long as these alterations do not substantially vary the characteristics which are claimed below.

Claims (3)

1.- Expansive dental implant, arranged for its introduction into bones, characterized by being composed of two pieces joined together by means of thread, both being coaxial, constituting the first inner piece (1) as a cylindrical rod (3) endowed with a threaded head ( 4), which will be introduced into the threaded hole (5) inside the second piece or outer piece (2), said hole (5) being only threaded on its upper part, the lower one being smooth and provided with reduction in its inner diameter, progressively as measured in lower tails of said outer piece (2), the lower dimensions of said outer piece will expand according to the way the rod (3) moves. 2.- Expansive dental implant, according to claim one, characterized in that the outer part (2) consists of a thread (8) whose fillet section (9) will depend on the function or application, also being arranged in the lower dimension of said thread ( 8) of radial recesses that extend towards the lower end, in order to serve as a cut for its best introduction into the bone where the outer piece (2) will be housed. 3.- Expansive dental implant, according to claim one, characterized in that in the lower part of the outer part (2) and perpendicular to the axis thereof, there is a hole (15) suitable for the introduction of a mechanical element to guarantee the fixation to the bone