ES2553678B1 - Guided implantoplasty system and procedure - Google Patents

Abstract

Guided implantoplasty system comprising a milling body capable of rotating axially on its longitudinal axis, the milling body being provided with at least a roughing portion; an elongated guiding body capable of being positioned longitudinally in and partially protruding from the inside of a prosthetic fixing hole of an implant, the guiding body comprising fixing means linkable to the prosthetic fixing hole, in which the milling body and the guiding body are configured in a complementary manner to each other such that a tongue and groove relationship is defined between them in a condition of use; Another object of the invention relates to a guided implantoplasty procedure.

Description

5

10

fifteen

twenty

25

30

DESCRIPTION

System and procedure of guided implantoplasty OBJECT OF THE INVENTION

The purpose of this application is to register a system and a guided implantoplasty procedure that incorporates notable innovations.

More specifically, the invention proposes the development of a guided implantoplasty system and the procedure followed that allows the implantoplasty to be carried out precisely, homogeneously, quickly and safely, by means of milling and possible polishing directed and limited by a guide fixed to the proper implant.

BACKGROUND OF THE INVENTION

Periimplantitis is a localized infection of the tissues surrounding an osteointegrated dental implant due to a biological complication, caused by the adhesion of bacteria on the rough surface of the implant and its consequent colonization. It is characterized by its rapid progression and by causing a continuous loss of supporting bone.

The treatment of the most successful periimplantitis at present is implantoplasty, which consists in the elimination of the rough surface of the implant and the turns of the thread in its case, thus achieving the elimination of the areas of adhesion and colonization of the bacteria.

The tools used for the elimination of roughness and turns are rotary drills with a rod of very hard materials, driven by a micromotor that supports the specialist. This type of milling tool involves the following problems during implantoplasty:

- Milling is done by supporting and driving the tool by hand, which requires a great concentration of the specialist, significant risks of improper cuts and high milling execution times.

5

10

fifteen

twenty

25

30

35

- Milling is not possible in the area closest to the support bone, because the space is very small to allow access to the strawberry stem and the specialist has to hold it at a certain angle to the longitudinal axis of the implant.

- The lack of visibility in certain areas of the mouth means a high degree of difficulty for pulse milling.

- This milling technique does not allow a smooth and homogeneous final surface since it is not possible to cut the same thickness at all points.

DESCRIPTION OF THE INVENTION

The present invention has been developed in order to provide a guided implantoplasty system and procedure that resolves the aforementioned drawbacks, also providing other additional advantages that will be apparent from the description that follows.

Here, it will be understood that the lateral, perpendicular, transverse, longitudinal, frontal, posterior, superior or similar direction will be considered in a condition of use, in relation to the longitudinal axes of the respective components.

On the other hand, in the present invention, the word "cut" is to be understood as any action that allows to reduce, rough or eliminate a part of an implant.

It should be noted that the implant, as well as its components, is not part of the object of the present invention.

It is therefore a first object of the present invention a guided implantoplasty system, comprising an elongated milling body capable of rotating axially on its longitudinal axis, the milling body being provided with at least one roughing portion; an elongated guiding body capable of being positioned longitudinally in and partially protruding from the inside of a prosthetic fixing hole of an implant, the guiding body comprising fixing means linkable to the prosthetic fixing hole, in which the milling body and the guiding body are configured, at least partially, in a complementary manner to each other such that a tongue and groove relationship is defined between them in a condition of use.

5

10

fifteen

twenty

25

30

Thanks to these characteristics, implantoplasty is achieved with a milling directed and limited by the guiding body; Longitudinal and / or transverse movements of the milling body with respect to the implant are limited, depending on the particular needs. The inconveniences of the prior art are avoided, such as the risk of improper cuts and high milling execution times, milling in the area closest to the support bone if that is possible since there is no risk of damaging it, and a surface is achieved final implant homogeneous and smooth.

The system of the invention performs the milling directed by the guide, which eliminates the risks described, even without the need for direct vision by the specialist.

The runtime of implantoplasty is reduced. Thanks to the elimination of the risks during the cut, and to that the work is carried out guided by a guide, the times used in the application of the implantoplasty are reduced considerably.

The system of the invention allows implantoplasty to be performed without the need for a flap, thus reducing the frequent postoperative problems.

In addition, implantoplasty of reproducible and predictable results is achieved.

According to one aspect of the invention, the milling body can have at least partially a cylindrical configuration and the guiding body a rod configuration, the milling body comprising a first axial housing capable of receiving the guiding body.

According to one embodiment, the guiding body fixing means may comprise a first threaded portion complementary to a thread of the prosthetic fixing hole. With this solution, a firm and secure guiding body fixation is achieved.

In another embodiment, the fastening means of the guiding body may comprise a fastening element provided with at least one rib capable of fitting into the thread of the prosthetic fixing hole, the fastening element being manufactured in a

5

10

fifteen

twenty

25

30

35

elastic properties material. This solution allows to expand the number of implant models to which the same guiding body design can be attached.

The roughing portion of the milling body may be arranged on: a lateral surface of the first housing, on an advance surface of the milling body and on a surface of the outer contour of the milling body, or the combination thereof.

The first housing may have at least two regions of different diameters from each other. In this way, one region can be responsible for limiting the lateral or frontal advance of the milling body with respect to the implant thanks to the guiding body, while the other region can have the roughing portion that allows the implant to be lowered.

According to another aspect of the invention, the milling body may comprise a feed and an exhaust orifice, capable of supplying and evacuating cooling liquid to and from the first housing; in which the feeding and exhaust holes communicate the first housing with the outside. Thanks to these characteristics, the temperature reached by the friction between the roughing portion and the implant can be controlled, as well as evacuate the possible shavings that are released by the roughing of the implant.

In an alternative way of limiting the relative advance of the guiding body with respect to the milling body, the milling body may additionally comprise a pin capable of traversing openings in the milling body, which communicate the first housing with the outside, in the that the openings are arranged perpendicularly and diametrically opposite each other.

The guiding body may comprise a longitudinally movable stop member relative to the rest of the guiding body. In this way it is possible to adopt numerous longitudinal arrangements to easily adapt to the particular needs of each case. In a practical and advantageous embodiment of this aspect, the stopper element is a plug as a blind nut, screwed into a second threaded portion opposite the first portion, an annular protuberance having been provided between the first and second threaded portion and a locknut between the stopper element and the annular protuberance.

In another aspect of the invention, the guided implantoplasty system may additionally comprise an elongated polishing body capable of rotating on its longitudinal axis,

5

10

fifteen

twenty

25

30

the polishing body comprising a stem and a sleeve longitudinally linked to one end of the stem, the stem presenting a second axial housing communicated with a free passage of the sleeve, in which the sleeve, the second housing and the guiding body are configured, at least partially, in a complementary manner to each other such that a tongue and groove relationship is defined between the guiding element and a recess defined by the second housing and the free passage of the sleeve in a condition of use, the sleeve being manufactured with material suitable for polish metals Thanks to these characteristics, the surface previously milled by the milling body can be polished in a directed and limited manner, and a completely smooth implant surface is achieved that prevents the adhesion and colonization of bacteria, with the consequent reduction of risks of recidivism of the periimplantitis

In an alternative embodiment of the milling body, advantageously designed to avoid the not required roughing of an implant neck when for example a lateral cut of the implant is carried out, said milling body comprises an annular recess provided in the first housing, the annular recess being configured in such a way that it is capable of receiving in a complementary way to an implant neck, in a condition of use.

In another alternative embodiment of the milling body, advantageously designed to avoid the not required roughing of an implant neck when, for example, a lateral and / or frontal cutting of the implant is carried out, said milling body comprises at least one pair of elongated limbs arranged along the direction of the longitudinal axis of the milling body, in which a first end of the limb is pivotally connected with respect to a leading surface and a second end comprises a roughing portion as a shoe .

Another object of the invention is a guided implantoplasty procedure, for application on an implant, with a guided implantoplasty system as described above, comprising the steps of:

a) measurement of the portion of the implant to be treated;

b) positioning of a guide body over the prosthetic fixation hole;

c) complementary connection of the milling body and the guiding body to each other; Y

d) milling by the milling body on the portion of the implant to be treated.

5

10

fifteen

twenty

25

30

35

Thanks to this procedure, implantoplasty can be performed with a milling directed and limited by the guiding body, reducing and optimizing the implantoplasty.

It should be mentioned that the present procedure, object of the present invention, is applied exclusively on a prosthetic implant, without affecting the human body.

Advantageously, the milling of step d) can be carried out in the same direction as the longitudinal axis of the implant with the roughing portion disposed on an advance surface of the milling body.

On the other hand, milling of step d) can be carried out following a transverse direction with respect to the longitudinal axis of the implant with the roughing portion arranged on a lateral surface of the first housing of the milling body.

Both milling in the transverse and longitudinal directions can be done in one or more milling phases.

The guided implantoplasty procedure, after stage d), may further comprise the steps of:

e) complementary linkage of the polishing body and the guiding body to each other; Y

f) polishing by the sleeve of the polishing body, on the portion of the previously milled implant.

When a system with a longitudinally movable stop member with respect to the rest of the guide body is used, in the present procedure, the position of the stop element and the locknut can be moved longitudinally relative to the rest of the guide body.

Other features and advantages of the guided implantoplasty system and procedure object of the present invention will be apparent from the description of a preferred but not exclusive embodiment, which is illustrated by way of non-limiting example in the accompanying drawings, in the which:

BRIEF DESCRIPTION OF THE DRAWINGS

5

10

fifteen

twenty

25

30

Figure 1.- It is a schematic view of an example of the type of implant to which the present invention is linked;

Figures 2a-2b.- They are schematic views of two embodiments of a guiding body with different fixed lengths according to the present invention;

Figures 2c-2e.- These are schematic views of a third embodiment of the guiding body of variable length;

Figure 2f.- It is a schematic view of a fourth embodiment of the guiding body with a means of fixation by fitting;

Figure 3a.- It is a schematic view of a first embodiment of a milling body with two different diameters of the first housing according to the invention;

Figure 3b.- It is a schematic perspective view of the milling body of Figure 3a with a partial section according to line A-B of Figure 3a;

Figure 3c.- It is a schematic perspective view of the milling body of Figure 3a without partial section;

Figure 3d.- It is a schematic view in longitudinal section of a second embodiment of a milling body with a single diameter of the first housing .;

Figure 3e.- It is a schematic view of a third embodiment of a milling body with a roughing portion located on a surface of the outer contour of the milling body;

Figure 3f.- It is a schematic view of a fourth embodiment of a milling body with a pin;

Figure 3g.- It is a schematic view of a fifth embodiment of a milling body with an axial irrigation channel;

Figure 3h.- It is a schematic view of a sixth embodiment of a milling body with an annular recess;

Figure 3i.- A seventh embodiment of a milling body with legs linked to it is a schematic view;

Figure 3j.- It is a schematic sectional view according to the line A’-B ’of Figure 3i;

Figure 4.- It is a schematic view in longitudinal section of an embodiment of a polishing body according to the invention;

Figures 5a-5i.- These are schematic views of the different stages of an implantoplasty procedure with the system of the present invention, for cross-sectional (lateral) milling in two phases;

5

10

fifteen

twenty

25

30

35

Figures 6a-6i.- They are schematic views of the different stages of an implantoplasty procedure with the system of the present invention, for a frontal cut in two phases, using a guiding body of variable length; Y

Figures 7a-7f.- They are schematic views in longitudinal section of the different stages of an implantoplasty procedure with the system of the present invention for a frontal cut in a single phase with a milling body provided with a first single diameter housing .

List of numerical references of the figures

1 implant

2 milling body

3 guiding body

4 polishing body

11 prosthesis fixation hole

12 external thread

13 implant neck

21 first accommodation

211,212 regions of the first housing 21 (with different diameter from each other)

214 annular recess

215 limb

215A first end of the limb 215 215B second end of the limb 215

216 portion of roughing (at tip 215)

216A advance roughing region

216B region of lateral roughing

22 roughing portion (on a side surface of the first housing 21)

23 roughing portion (on a leading surface 29)

24 grinding portion (on a surface of the outer contour of the milling body 2)

25 openings

251 pin

26 feed and exhaust holes

27 axial irrigation channel

28 connection end

29 feed surface

31 first threaded portion

5

10

fifteen

twenty

25

30

32 second threaded portion

33 fastener

331 nerve

34 stop element

35 annular protuberance

36 locknut

41 second accommodation

42 stem

43 sleeve

The longitudinal axis of the implant

E2 longitudinal axis of the milling body

E3 longitudinal axis of the guide body

E4 longitudinal axis of the polishing body

1A implant surface after first milling

1B implant surface after additional milling

1C implant surface after polishing

DESCRIPTION OF A PREFERRED EMBODIMENT

In view of the aforementioned figures and, according to the numbering adopted, examples of preferred embodiments of the invention can be observed therein, which includes the parts and elements indicated and described in detail below.

Some non-visible elements have been represented with dashed lines for reasons of clarity.

Figure 1 shows an implant 1 in elevation and plan showing, among others, a prosthesis fixation hole 11 (the implant prosthesis has not been represented for reasons of clarity), an external thread 12 for fixation in a patient bone and an implant neck 13. As already mentioned above, implant 1 is not part of the present invention and could also be another model not represented and present in the market. The present implant model 1 is an example to explain the invention.

5

10

fifteen

twenty

25

30

35

As can be seen in Figures 5a-5c, 6a-6b, 7a-7b, the present guided implantoplasty system comprises an elongated milling body 2 capable of rotating axially on its longitudinal axis E2. This rotation would be driven by a drive unit (not shown) commercially available such as a micromotor; the milling body 2 would be linked to the motor unit through a connection end 28, configured with reliefs or recesses to engage as a head a counter-angle with the motor unit, which would be operated by the user.

The milling body 2 presents in this embodiment a fundamental and generally cylindrical configuration, although it will be obvious to the person skilled in the art that instead of a circular section any other may present, which allows for example a better grip, and in that case not present a cylindrical configuration. And even different circular sections of different diameters may be present.

The milling body is also provided with at least one roughing portion 22, 23, 24, 216. The arrangement and characteristics of the roughing portion will be explained later.

The present system also comprises an elongated guide body 3, which is capable of being positioned longitudinally in and partially protruding from the inside of the prosthetic fixation hole 11 of an implant 1, as illustrated in Figures 5a-5c, 6a-6b, 7a-7b, for this purpose the guide body 3 comprises fixing means that can be connected to the prosthetic fixing hole 11.

In a preferred embodiment represented in Figures 2a-2e, the fixing means comprise a first threaded portion 31 complementary to the prosthetic fixing hole 11. The dimensions of this first threaded portion 31, as well as the geometric configuration thereof, may be adapted particularly at each prosthetic fixation hole 11 of the market. Thus, a firm and secure connection for guided implantoplasty can be guaranteed.

In another embodiment of the fixing means, shown in FIG. 2f, they comprise a fastening element 33 provided with at least one rib 331 capable of fitting into the thread of the prosthetic fixing hole 11. In addition, the fastening element 33 is preferably manufactured in a material with elastic properties such as

5

10

fifteen

twenty

25

30

rubber or similar and with a substantially cylindrical configuration, although it may change. This configuration of material and shape allows a fixation by means of pressure adjustment, which gives the guiding body 3 greater adaptability to the different implant models 1.

In Figures 3a-3i, among others, it is appreciated that the milling body 2 comprises a first axial housing 21 capable of receiving the elongated guiding body 3 and preferably with a shank configuration. In this way, a tongue and groove type connection can be achieved, in a condition of use, between the guiding body 3 and the milling body 2 (see for example Figures 5a-5c, 6a-6b, 7a-7b).

The first housing 21 may have at least two regions 211,212 of different diameters from each other. For example, in the region 211 with a lower diameter located further away from the mouth of the first housing 21, the guiding body 3 is received. In the region 212 of a diameter greater than the previous one, a roughing portion 22 can be placed as will be seen later. .

In Figures 3a-3j, it is illustrated that the milling body 2 is provided with at least one roughing portion 22, 23, 24, 216. The roughing portion 22, 23, 24, 216 may be arranged on a surface side of the bore 21, on a feed surface 29 of the milling body 2, on a surface of the outer contour of the milling body 2, on a pair of limbs 215 or the combination thereof, depending on the particular needs of the area a try. As an example it is possible that if the roughing portion 24 is located on a surface of the outer contour of the milling body 2, it can even be used to lower a fixing bone.

However, it will be evident to locate the roughing portion 22, 23, 24, 216 in a combination of the aforementioned locations, as for example can be seen in Figures 3a-3h. These roughing portions 22, 23, 24, 216 may adopt a configuration such as saw teeth, protuberances, roughnesses, edges, coatings, etc. which preferably can be made of high hardness materials such as tungsten carbide or diamond. These materials are chosen to be able to work on the implant 1. In the event that the roughing portion is located on the lateral surface 22 of the first housing 21, it will be especially preferred that the first housing 21

5

10

fifteen

twenty

25

30

35

present the two regions 211, 212 of different diameters with each other, with the region 212 closest to the mouth of the first housing 21, of a diameter greater than that of the implant.

Depending on the case, it may be necessary to lower, for example, the external thread 12 of the implant 1 without affecting the implant neck 13. To this end, the present invention includes a pair of embodiments of the milling body 2 that prevent the cutting of said implant neck 13 The first of these embodiments is shown in Figure 3h, where it is appreciated that the milling body 2 comprises an annular recess 214 provided in the first housing 21, the annular recess 214 is configured in such a way that it is capable of receiving so complementary to an implant neck 13 in a condition of use. In the second of the embodiments shown in FIGS. 3i-3j, the milling body 2 preferably comprises a pair of elongated ends 215 arranged along the direction of the longitudinal axis E2 of the milling body. These extremities 215 comprise a first end 215A which is pivotally connected with respect to the leading surface 29 and a second end 215B distal to the first end 215A, which in turn comprises the roughing portion 216 as a shoe. The roughing portion 216 can be roughed in the direction of longitudinal advance of the milling body 2 and / or lateral thanks to the fact that it has a region of advance roughing 216A and a region of lateral roughing 216B.

To carry out the tilting with respect to the longitudinal axis E2, the first end 215A may be provided with suitable joints (not shown), and the extremities 215 may be driven either manually with some type of tool suitable for this purpose or with some mechanism impeller (not shown). One could move from an open limb position 215 (divergent from each other) to a closed one (convergent with each other) and vice versa. In another variant, the ends 215 are in solidarity with the rest of the milling body 2, and describe the tilting movement described above thanks to the configuration of the tip 215 itself, which can behave like a clamp thanks for example to the use of materials with memory of position. In this way, once the extremities 215 have been tilted (diverging from each other) so as not to rough the implant neck 13, they will return to their resting position (convergent to each other).

Continuing with Figures 3a-3c and 3e, it is shown that the milling body 2 preferably comprises a feed and exhaust port 26, capable of supplying and evacuating cooling liquid to and from the first housing 21. The feeding holes and of

5

10

fifteen

twenty

25

30

35

Exhaust 26 communicates the first housing 21 with the outside of the milling body 2, and in said feed and exhaust orifice 26, the cooling liquid will be irrigated, which in addition to cooling will make it possible to clean the working area of possible chips between the roughing portion 22, and the implant 1. In another embodiment shown in Figure 3g, the milling body 2 comprises an axial irrigation channel 27 for supplying the coolant to the work area.

The present guided implantoplasty system may additionally comprise a pin 251 capable of traversing openings 25 in the milling body 2, which connect the first housing 21 with the outside, in which the openings 25 are arranged perpendicularly and diametrically opposite each other, as illustrated in figures 3a-3c and 3f. The purpose of the pin 251 is to serve as a stop to the passage of the guide body 3.

In an alternative embodiment shown in FIGS. 2c-2e, the guiding body 3 may comprise a longitudinally movable stop member 34 with respect to the rest of the guiding body 3. The stop member 34 in this case is a stopper by way of blind nut, screwed into a second threaded portion 32 opposite to the first portion 31, an annular boss 35 having been provided between the first and second threaded portion 31.32 and a locknut 36 between the stop member 34 and the annular boss 35. This Locknut allows the stop element 34 to be fixed in position to limit the relative advance of the milling body 2 with respect to the implant 1, with infinite possible advance distances, and thus the area to be treated of the implant 1.

As for the materials used in the different components of the present invention, not mentioned so far, they may be whatever is appropriate in the field of dentistry.

The guided implantoplasty system additionally comprises an elongated polishing body 4 capable of rotating on its longitudinal axis E4, similar to that described for the milling body 2. Continuing with the description of the polishing body 4 illustrated, among others in Figure 4, it comprises a stem 42 and a sleeve 43 longitudinally linked to one end of the stem 42, the stem 42 has a second axial housing 41 communicated with a free passage of the sleeve 43. It can be seen in Figure 4 that the second housing 41 and the free passage of the sleeve 43 are arranged

5

10

fifteen

twenty

25

30

35

form as if a continuation of the second housing 41 was defined. The sleeve 43, the second housing 41 and the guiding body 3 are configured, at least partially, in a complementary manner to each other such that a tongue and groove relationship is defined between the element of guided and a recess defined by the second housing 41 and the free passage of the sleeve 43 in a condition of use. This condition of use can be seen by way of example in Figures 5g-5h.

For its part, the sleeve 43 is made of a material suitable for polishing metals, for example rubber or the like; However, it will be obvious to the person skilled in the art that depending on the material used, stem 42 and sleeve 43 may be integral with each other.

When the user wishes to carry out the present invention with a guided implantoplasty system as described above, a guided implantoplasty procedure will be followed, comprising the steps of:

a) measurement of the portion of the implant 1 to be treated. The implant model 1 to be treated is determined and the length and thickness thereof required for milling is measured, in order to remove the rough surface colonized by the bacteria. Based on the previous measurements and the implant model 1 to be milled, the technician decides the type of milling that will be performed on the implant 1, either using the frontal cut with the roughing region 23 on the feed surface of the body of milling 2, using the lateral cut with the roughing region 22 on the lateral surface of the bore 21, or using the roughing portion 216 with its corresponding forward roughing regions 216A or lateral 216B of the ends 215 for a lateral or frontal cutting respectively. In some cases a combination of both will be necessary and even repeat the same type of cut with different housing diameters 21 different. Depending on the type of cut chosen, a diameter of the milling body 2 and a diameter and length of the guiding body 3 of cylindrical configuration are selected;

b) positioning of a guiding body 3 on the prosthetic fixation hole 11. Depending on the implant model 1, a guiding body 3 with the appropriate fastening means will be adopted;

5

10

fifteen

twenty

25

30

35

c) complementary connection of the milling body 2 and the guiding body 3 to each other. Once the milling body 2 is attached to the counter-angle of the motor or micromotor unit (not shown), the milling body 2 is coupled to the guiding body 3; Y

d) milling by the milling body 2 on the portion of implant 1 to be treated. This milling stage will be detailed later with the description of three practical examples. This milling can be carried out essentially in two variants: a first one following the same direction as the longitudinal axis E1 of the implant 1 with the roughing portion 23 disposed on a feed surface 29 or the feed roughing region 216A of the portion of roughing 216 of the milling body 2, and a second one following a transverse direction with respect to the longitudinal axis E1 of the implant 1 with the roughing portion 22 arranged on a lateral surface of the first housing 21 or the lateral roughing region 216B of the portion of roughing 216 of the milling body 2. Within these variants to carry out the milling, they can be carried out in one or more milling phases in a transverse and / or longitudinal direction with respect to the longitudinal axis E1 of the implant, in which one is used or more milling bodies 2, where in case of use of more than one milling body 2. its regions 212 have different diameters.

After stage d), the steps of:

e) complementary linkage of the polishing body 4 and the guiding body 3 to each other; Y

f) polishing by the sleeve 43 of the polishing body 4, on the portion of the previously milled implant 1.

Step d) related to milling will be explained below with three examples to improve the understanding of the present invention. However, it will be evident to a person skilled in the art that the order and number of stages can be modified, as well as the dimensions and characteristics of the tools used.

First milling example (figures 5a-5i)

In this first example, milling is carried out in a lateral or perpendicular direction to the longitudinal axis E1 of the implant and in two phases. Once the dimensions have been chosen and

5

10

fifteen

twenty

25

30

characteristics of the milling tools, the technician links a milling body with a roughing portion 22 located on the lateral surface of the first housing 21 (Figure 5A). In the connection, the rod-shaped guide body 3 makes internal contact with the first housing 21 in the direction of the longitudinal axis E1, so the dimension parallel to the longitudinal axis E1 that the implant 1 has to be treated is limited. a certain clearance is seen, in the direction perpendicular to the longitudinal axis E1, between the guide body 3 in the form of a rod and the first housing 21. Next, the milling body 2 is rotatably activated, and the same is moved laterally and describing it circles around the longitudinal axis E1 to perform a first roughing (figures 5b-5c). By moving the milling body 2 laterally, the roughing portion 22 acts on the external thread 12 and the longitudinal axes E1 and E2 respectively of the implant 1 and the milling body 2 are perpendicularly spaced from each other; These lateral movements are possible thanks to the clearance defined above. It should be mentioned that once the guiding body 3 is positioned on the fixing hole of the prosthesis 11, its longitudinal axes E1 and E3 can be considered to be coincident with each other. After this first phase, it is achieved that the implant 1 has an implant surface after a first milling 1A as illustrated in Figure 5d. In this case, the external thread 12 and implant neck 13 have been lowered.

Next, the technician exchanges the milling body 2 for another that has an inner diameter of the first housing 21 narrower than in the previous phase. The lateral and circular movements described above are repeated (Figure 5e) and an implant 1 with an implant surface is obtained after additional milling 1B.

In order to achieve a final polished finish of the surface of the treated implant 1, a guiding body 3 is placed on the implant 1 and a polishing body 4 is coupled (Figure 5g). In this case the longitudinal axis E4 is coincident with the longitudinal axis E1. The rotary activation of the polishing body 4 (figure 5h) is carried out until an implant 1 is achieved with an implant surface after polishing 1C (figure 5i) according to the needs posed by the specialist to eliminate the rough surfaces that are prone to host harmful bacteria to the user.

Second milling example (figures 6a-6i)

5

10

fifteen

twenty

25

30

35

In this second example, milling is carried out in a frontal direction in line with the longitudinal axis E1 and in two phases, using a guiding body 3 of variable length. For this, the technician selects a milling body 2 with a roughing portion 23 located on the leading surface 29. In addition, a guiding body 3 of which has a stop element 34 adjustable in longitudinal direction with respect to the rest of the body is used. of guidance 3. However, a guide body 3 of fixed length may be used. After the corresponding measurements, the technician can choose to perform the milling in two phases, depending on the volume to be milled from the implant 1.

First, the guide body 3 is placed and the stop member 34 configured as a blind nut is displaced longitudinally. Once the length necessary to limit the advance of the milling body 2 with respect to the implant 1 is achieved, the stopper element 34 is fixed in position with the lock nut 36. The milling body 2 and the body of the tongue 2 are then tongue and grooved. guided 3, so that the roughing portion 23 contacts the implant neck 13 (Figure 6a). The coupling of the stop member 34 and the first housing 21 does not allow lateral (perpendicular) movement of the milling body 2 with respect to the implant 1.

When the milling body 2 is rotatably driven, the neck of the implant 13 and the external thread 12 are roughed up, until the stop member 34 internally contacts the inner end of the first housing 21 (Figure 6b). The result can be seen in Figure 6c with an implant 1 having an implant surface after a first milling 1A.

The same operation is repeated again when changing the milling body 2 with another one with an inside diameter of the first housing 21 smaller than that of the milling body 2 previously used; it is linked (figure 6d) and it is milled (figure 6e) until the stop element 34 contacts internally again with the internal end of the first housing 1. The result can be seen in figure 6f with an implant 1 that has a implant surface after additional milling 1B.

As described in the first example of milling, in this case the polishing body 4 (figures 6g and 6h) is also rotatably coupled and operated until an implant 1 is achieved with an implant surface after polishing 1C presented in Figure 6i.

5

10

fifteen

twenty

25

30

35

Third milling example (figures 7a-7f)

In this third example, milling is carried out in the front direction in line with the longitudinal axis E1 and in a single phase. In addition, a milling body 2 with a single diameter of the first housing 21 is used. Figure 7a shows an illustration showing a link similar to that of Figure 6a, except that the guide body 3 has a configuration as illustrated in figures 2a and 2b, that is to say with a fixed length. The milling shown in Figure 7b, has stopped when the rod-shaped guide body 3 internally contacts the inner end of the first housing 21. Again, being a milling in the frontal (longitudinal) direction, it is avoid clearances in the transverse direction between the guiding body 3 and the milling body 2. In Fig. 7c the implant 1 is illustrated with an implant surface after a first milling 1A.

As milling is performed in a single phase, Figures 7d-7f illustrate procedures analogous to the previous examples except that a fixed length guide body 3 is used.

With the present procedure the following advantages are achieved:

- Homogeneity and predictability in the cut. The execution of the milling directed by the guiding body 3 allows to limit the cut only to the implant surface 1 that is required to be treated and to the predefined thickness, with a homogeneous and predictable final result because the milled thickness is the same throughout the entire Implant surface 1 treated. And with the additional subsequent application of the polishing body 4 the result is a completely smooth treated implant surface 1 that prevents the adhesion and colonization of bacteria, with the consequent reduction in the risk of recurrence of peri-implantitis.

- Reduction of risks in the cut. The milling cutters that are currently used for implantoplasty require a great concentration of the technician during the cut to be performed by hand, assuming significant risks due to excessive milling of the implant or even cutting in unwanted areas. These risks are considerably increased in areas of difficult visibility. The system of the invention performs the milling directed by the guiding body 3, which eliminates the described risks, even without the need for direct vision.

- Reduction in the execution time of implantoplasty. Thanks to the elimination of risks during cutting, the use of tools that perform cutting and polishing on a large surface simultaneously and to which the work is done directed

5 by a guiding body 3, the times used in the application of the

Implantoplasty are greatly reduced.

- The frontal cut of the milling body 2 allows access without difficulty to the most angular areas of union between the implant 1 and the supporting bone.

10

- The system of the invention allows implantoplasty to be performed without the need for a flap, thus reducing the frequent postoperative problems.

The details, shapes, dimensions and other accessory elements, as well as the materials used in the manufacture of the system and guided implantoplasty procedure of the invention may be conveniently substituted by others that do not depart from the scope defined by the claims that They are included below.

Claims (18)

5 10 fifteen twenty 25 30 35 1. Guided implantoplasty system, characterized by the fact that it comprises an elongated milling body (2) capable of rotating axially on its longitudinal axis (E2), the milling body (2) being provided with at least a portion of roughing (22, 23, 24, 216); an elongated guiding body (3) capable of being positioned longitudinally in and partially protruding from the inside of a prosthetic fixation hole (11) of an implant (1), the guiding body (3) comprising fastening means attachable to the hole of prosthetic fixation (11), in which the milling body (2) and the guiding body (3) are configured, at least partially, in a complementary manner to each other such that a tongue and groove relationship is defined between them in a condition of use 2. A guided implantoplasty system according to claim 1, characterized in that the milling body (2) has at least partially a cylindrical configuration and the guiding body (3) a rod configuration, the milling body ( 2) comprising a first axial housing (21) capable of receiving the guiding body (3). 3. Guided implantoplasty system according to any one of the claims above, characterized in that the fixing means of the guide body (3) comprise a first threaded portion (31) complementary to a thread of the prosthetic fixing hole (11). 4. Guided implantoplasty system according to any one of claims 1-2, characterized in that the fixing means of the guiding body (3) comprise a fastener (33) provided with at least one rib (331) capable of fitting into the thread of the prosthetic fixation hole (11), the fastening element (33) being made of a material of elastic properties. 5. Guided implantoplasty system according to any one of the claims above, characterized by the fact that the roughing portion (22, 23, 24) is arranged in: a lateral surface of the first housing (21), on an advance surface of the milling body (2) and on a surface of the external contour of the milling body (2), or the combination of them. 5 10 fifteen twenty 25 30 35 6. A guided implantoplasty system according to any one of the preceding claims, characterized in that the first housing (21) has at least two regions (211,212) of different diameters. 7. Guided implantoplasty system according to any one of the claims above, characterized in that the milling body (2) comprises a feed and exhaust port (26), capable of supplying and evacuating cooling liquid to and from the first housing (21); in which the feeding and exhaust holes (26) communicate the first housing (21) with the outside. 8. Guided implantoplasty system according to any one of the claims above, characterized in that it additionally comprises a pin (251) capable of traversing openings (25) in the milling body (2), which connect the first housing (21) with the outside, in which the openings ( 25) are arranged perpendicularly and diametrically opposite each other. 9. Guided implantoplasty system according to any one of the claims above, characterized by the fact that the guiding body (3) comprises a stop element (34) movable longitudinally with respect to the rest of the guide body (3). 10. Guided implantoplasty system according to claim 9, characterized in that the stopper element (34) is a plug as a blind nut, screwed into a second threaded portion (32) opposite the first portion (31) , having provided an annular protuberance (35) between the first and second threaded portion (31, 32) and a locknut (36) between the abutment element (34) and the annular protuberance (35). 11. A guided implantoplasty system according to any one of the preceding claims, characterized in that it additionally comprises an elongated polishing body (4) capable of rotating on its longitudinal axis (E4), the polishing body (4) comprising a stem (42) and a sleeve (43) longitudinally linked to one end of the stem (42), the stem (42) presenting a second axial housing (41) communicated with a free passage of the sleeve (43), in which the sleeve (43), the second housing (41) and the guiding body (3) are configured, at least partially, in a complementary manner to each other such that a tongue and groove relationship is defined between the element of 5 10 fifteen twenty 25 30 35 guided and a recess defined by the second housing (41) and the free passage of the sleeve (43) in a condition of use, the sleeve (43) being manufactured with material suitable for polishing metals. 12. Guided implantoplasty system according to any one of the preceding claims, characterized in that the milling body (2) comprises an annular recess (214) provided in the first housing (21), the annular recess (214) being configured in such a way that it is capable of receiving in a complementary way to an implant neck (13) in a condition of use. 13. Guided implantoplasty system according to any one of claims 1-11, characterized in that the milling body (2) comprises at least one pair of elongated limbs (215) arranged along the axis direction length (E2) of the milling body, in which a first end (215A) of the end (215) is pivotally connected with respect to a leading surface (29) and a second end (215B) comprises a roughing portion (216) as a shoe. 14. Guided implantoplasty procedure, for application on an implant (1), with a guided implantoplasty system according to any one of the preceding claims characterized by the fact that it comprises the steps of: a) measurement of the portion of the implant (1) to be treated; b) positioning of a guide body (3) over the prosthetic fixation hole (11); c) complementary connection of the milling body (2) and the guiding body (3) to each other; Y d) milling by the milling body (2) on the implant portion (1) to be treated. 15. Guided implantoplasty procedure according to the preceding claim, characterized in that the milling of stage d) is carried out in the same direction as the longitudinal axis (E1) of the implant (1) with the roughing portion ( 23) disposed on a feed surface (29) of the milling body (2). 16. Guided implantoplasty procedure according to claim 14, characterized in that the milling of step d) is carried out following a transverse direction with respect to the longitudinal axis (E1) of the implant (1) with the roughing portion ( 22) disposed on a lateral surface of the first housing (21) of the milling body (2). 17. Guided implantoplasty procedure according to claim 15 or 16, characterized in that the milling of stage d) is performed in two milling phases in a transverse or longitudinal direction with respect to the longitudinal axis (E1) of the implant. 5 18. A guided implantoplasty method according to any one of claims 14-16, with a guided implantoplasty system according to claim 11, characterized in that subsequent to step d), it further comprises the steps of: e) complementary linkage of the polishing body (4) and the guiding body (3) between 10 yes; Y f) polishing by the sleeve (43) of the polishing body (4), on the portion of the implant (1) previously milled.