WO2014132278A1

WO2014132278A1 - Improved endosseous implant

Info

Publication number: WO2014132278A1
Application number: PCT/IT2014/000053
Authority: WO
Inventors: Claudio AGOSTINELLI
Original assignee: Agostinelli Claudio
Priority date: 2013-02-27
Filing date: 2014-02-26
Publication date: 2014-09-04
Also published as: ITRM20130471A1; ITTE20130001A1

Abstract

The invention concerns an endosseous implant (1; 21; 31; 41; 51; 61) comprising: - an insertion portion (2; 22; 32; 42; 52; 62), provided with a threaded outer surface (3; 23; 33; 43; 53; 63) configured to be screwed on a dental bone, said insertion portion (2; 22; 32; 42; 52; 62) having a set diameter and a set length, wherein the ratio between said set diameter and said set length is equal to or higher than 0-54; and - a projecting portion (4; 24; 34; 44; 54; 64), longitudinally connected with said insertion portion (2; 22; 32; 42; 52; 62).

Description

IMPROVED ENDOSSEOUS IMPLANT

The present invention relates to an improved endosseous implant .

More specifically, the invention concerns a large endosseous implant, preferably comprised of titanium. As it is well known, in order to introduce an

endosseous implant or a dental implant, also known as "fixture" within one of the maxilla bones, it is necessary that set osseous volumes are present.

In order to satisfy different anatomic conditions of osseous structures, implants with different lengths are available on the market that can be used on the basis of the specific needing. Said implants have a maximum length of 7 - 8 mm (diameter) .

Due to the "body" and turns shape, known implants cannot be used by standard techniques within a large alveolus (i.e. within the osseous cavity seating the tooth) (diameter ranging between 8 and 11 mm) and/or within multiple alveolus of the same tooth (i.e. in case of teeth with multiple roots, such as premolars and molars) .

It is also known that, after the loss of a large dental element, particularly teeth with a plurality of roots (i.e. molar or premolar teeth), a dental root or a already implanted dental implant, it is often not possible immediately replacing the missing element. In these cases, so called regenerative techniques are employed, said techniques providing filling of residual osseous alveolus by bio-materials.

Recent scientific literature written during the last decade demonstrate that waiting time necessary to obtain a new bone sufficient to introduce an endosseous implant are an average of 6 - 9 months. Duration of this period depends on the type of bio-material

employed and on the biological response of the patient . Thus, when planning a rehabilitation period on an osseous site under the above conditions, it must be taken into consideration, besides the time period indicated in the above, the following phases:

- implant (fixture) can be introduced after the above 6

- 9 month period;

- waiting time of 3 - 4 months;

- beginning the provisional prosthetic treatment;

- 3 - 4 month period of masticator load employing the provisional prosthesis;

- application of final prosthesis.

Finally, treatment requires at least 12 - 17 months to be finalized.

In view of the above, applicant has realized an

improved endosseous implant permitting solving the above problems .

These and other results are obtained according to the present invention by suggesting a large endosseous implant, suitable to be introduced within large

alveolus sites.

It is therefore specific object of the present

invention an endosseous implant comprising:

- an insertion portion, provided with a threaded outer surface configured to be screwed on a dental bone, said insertion portion having a set diameter and a set length, wherein the ratio between said set diameter and said set length is equal to or higher than 0.54; and - a projecting portion, longitudinally connected with said insertion portion.

Particularly, said projecting portion has the shape of a truncated cone .

Furthermore, according to the invention, said

projecting portion can have a stepwise configuration. Always according to the invention, said insertion portion can have a cylindrical shape, and particularly said set diameter of said insertion portion is ranging between 8.1 and 12 mm.

Always according to the invention, said insertion portion can have the shape of a truncated cone, and particularly said set diameter of said insertion portion is ranging between 9.1 and 12 mm.

Further, according to the invention, said set length of said insertion portion is ranging between 3 and 15 mm.

Furthermore, according to the invention, said insertion portion can have flat end provided with at least one groove to allow blood flow while inserting said endosseous implant in a dental bone.

Still according to the invention, said threaded outer surface has a plurality of vertical grooves.

Always according to the invention, the bottom portion of the endosseous surface can have a saw-shaped surface .

In a further embodiment of the endosseous implant according to the invention, the bottom portion of the endosseous implant can have a smooth surface, possibly with drainage grooves.

In a further embodiment of the endosseous implant according to the invention, a central cavity is

provided on said bottom portion.

The present invention will be now described, for illustrative, but not limitative purposes, with

particular reference to its preferred embodiments shown in the enclosed figures of the drawings, wherein:

figure 1 is a first perspective view of a first

embodiment of the endosseous implant according to the invention;

figure 2 is a lateral view of implant of figurel;

figure 3 is a second perspective view of the implant of figure 1 ;

figure 4 is a vertical section view of the implant of figure 1;

figure 5 is a first perspective view of a second embodiment of the endosseous implant according to the invention;

figure 6 is a lateral view of implant of figures,- figure 7 is a second perspective view of the implant of figure 5;

figure 8 is a first perspective view of a third

embodiment of the endosseous implant according to the invention;

figure 9 is a lateral view of implant of figure8;

figure 10 is a second perspective view of the implant of figure 8;

figure 11 is a vertical section view of the implant of figure 8; figure 12 is a first perspective view of a fourth embodiment of the endosseous implant according to the invention;

figure 13 is a lateral view of implant of figurel2;

figure 14 is a second perspective view of the implant of figure 12;

figure 15 is a vertical section view of the implant of figure 12;

figure 16 is a first perspective view of a fifth embodiment of the endosseous implant according to the invention;

figure 17 is a lateral view of implant of figurel6;

figure 18 is a second perspective view of the implant of figure 16;

figure 19 is a first perspective view of a sixth embodiment of the endosseous implant according to the invention;

figure 20 is a lateral view of implant of figurel9; figure 21 is a second perspective view of the implant of figure 19;

figure 22 is a vertical section view of the implant of figure 19; and

figure 23 is a perspective view of a portion of the implant (projecting portion) that can be used in every one of the embodiments shown.

Observing first figures 1 - 4 of the enclosed drawings, it is shown a first embodiment of the endosseous implant according to the invention, generically

indicated by reference number 1.

Said implant 1 has an insertion portion 2, provided with a threaded outer surface 3 , so shaped to be screwed within a dental bone (not shown) , having a set diameter and a set length with a ratio equal to or higher than 0.54.

Implant 1 further provides a projecting portion 4, longitudinally connected with said insertion portion 2. In this embodiment, said insertion portion 2 has a cylindrical shape with a diameter ranging between 8.1 and 12 mm.

Always in the embodiment shown in figures 1 - 4, said projecting portion has the shape of a truncated cone. Always referring to figures 1 - 4, it is observed that said threading has substantially vertical grooves 5, to ease blood flow while inserting said endosseous implant in a dental bone .

Shape of threading 3 is very aggressive, to make insertion of within the bore much easier, and is provided with two starts of the threading.

From figures 3 and 4 it is observed that the bottom of the implant 1, i.e. the bottom of the insertion portion 2 has a cavity 7, in order to create a better contact with the bone.

Further, a serration 8 is provided always on the bottom of the implant 1, said serration 8, besides increasing contact with the bone, makes insertion of the implant 1 within the same bone easier.

By the above bottom arrangement, a higher stability and an implant that is much more active under a biologic point of view are obtained.

Serration 8 of the bottom 5 can be omitted. Finally, observing figure 4, it is noted that implant 1 has an inner, open seat of the projecting portion, for fixing prosthesis.

Embodiment shown in figures 5 - 7, wherein elements similar to those indicated in the previous embodiment will be indicated by the same references preceded by number 2, represents a short implant 21.

In this case, difference is the reduced height of implant 21 with respect to implant 1 of the previous embodiment and that cavity 7 cannot be provided.

Also in this case, serration 28 can be omitted.

Embodiment shown in figures 8 - 11, wherein elements similar to those indicated in the previous embodiment will be indicated by the same references preceded by number 3, represents an implant 31.

In this case, difference with respect to the first embodiment is the shape of a truncated cone of the insertion portion 32.

Also in this case, serration 38 can be omitted.

Embodiment shown in figures 12 - 15, wherein elements similar to those indicated in the previous embodiment will be indicated by the same references preceded by number 4, represents an implant 41.

In this case, difference is that bottom 46 is flat and does not present said serration.

Embodiment shown in figures 16 - 18, wherein elements similar to those indicated in the embodiment of figures 1 - 4 will be indicated by the same references preceded by number 5, represents a short implant 51.

In this case, difference is the reduced height of implant 51 with respect to implant 1 of the previous embodiment and that cavity 7 cannot be provided.

Further, in this embodiment bottom 56 is flat.

Embodiment shown in figures 19 - 22, wherein elements similar to those indicated in the embodiment of figures 1 - 4 will be indicated by the same references preceded by number 6, represents a short implant 61.

In this case, difference with respect to the first embodiment is that insertion portion 61 has the shape of a truncated cone.

Further, in this embodiment bottom 66 is flat.

Finally, observing figure 23, the projecting portion 4 is shown, said portion 4 being completely flat, or with a step configuration, or comprised of two portions 4' and 4" .

This embodiment of the projecting portion can be used for every of the embodiments described in the above with reference to the enclosed drawings, in order to permit, with particular biologic conditions, a better healing of soft tissues, and possibly receiving a specific, preformed prosthetic stump (abutment) .

The whole surface of the implant can be subjected to treatment by SLA system, enriched with phosphorous and calcium ions to stimulate and accelerate integration of the bone with the implant.

By the implant according to the invention, all

portions, corners and restrictions of the intra-root septa preventing proper positioning of the implant will be removed.

Reduced dimension of some tenth of millimeters of titanium tip permits obtaining housing undersized with respect to the implant that can be screwed within the bone and, thanks to the threading, permits obtaining a high torque (screwing force) ranging between 50 Ncm and more than 100 Ncm.

Thus, a remarkable primary stability is obtained, also in view of the large bone - implant contact surface, permitting realizing at the same time ("immediate loading" ) provisional and/or final dental prosthetic artifact.

Thus, by employing the implant 1, 21, 31, 41, 51, 61 according to the invention, protocol provides the following timing:

- application of the implant and realization of the provisional artifact;

- 2 - 3 month masticator load period;

- application of the final prosthesis.

Thus, time necessary to complete the work is reduced to a total of 3 - 4 months, with respect to 12 - 17 month period of traditional implants.

The present invention has been described, for

illustrative, but not limitative, purposes, according to its preferred embodiments, but it is to be

understood that variations and/or modifications can be introduced by those skilled in the art without

departing from the relevant scope as defined by the enclosed claims.

Claims

1. Endosseous implant (1; 21; 31; 41; 51; 61)

comprising:

- an insertion portion (2; 22; 32; 42; 52; 62), provided with a threaded outer surface (3; 23; 33; 43; 53; 63) configured to be screwed on a dental bone, said insertion portion (2; 22; 32; 42; 52; 62) having a set diameter and a set length, wherein the ratio between said set diameter and said set length is equal to or higher than 0.54; and

- a projecting portion (4; 24; 34; 44; 54; 64), longitudinally connected with said insertion portion (2; 22; 32; 42; 52; 62) .

2. Endosseous implant (1; 21; 31; 41; 51; 61)

according to claim 1, characterized in that said projecting portion (4; 24; 34; 44; 54; 64) has the shape of a truncated cone .

3. Endosseous implant (1; 21; 31; 41; 51; 61)

according to claim 1, characterized in that said projecting portion (4; 24; 34; 44; 54; 64) has a stepwise configuration.

4. Endosseous implant (1; 21; 31; 41; 51; 61)

according to one of the preceding claims, characterized in that said insertion portion (2; 22; 32; 42; 52; 62) has a cylindrical shape.

5. Endosseous implant (1; 21; 31; 41; 51; 61)

according to claim 1, characterized in that said set diameter of said insertion portion is ranging between 8 , 1 and 12 mm.

6. Endosseous implant (1; 21; 31; 41; 51; 61)

according to one of the preceding claims 1 - 3 , characterized in that said insertion portion (2; 22; 32; 42; 52; 62) has the shape of a truncated cone.

7. Endosseous implant (1; 21; 31; 41; 51; 61)

according to claim 6, characterized in that said set diameter of said insertion portion (2; 22; 32; 42; 52; 62) is ranging between 9,1 and 12 mm.

8. Endosseous implant (1; 21; 31; 41; 51; 61)

according to any one of the preceding claims,

characterized in that said set length of said insertion portion (2; 22; 32; 42; 52; 62) is ranging between 3 and 15 mm.

9. Endosseous implant (1; 21; 31; 41; 51; 61)

according to any one of the preceding claims,

characterized in that said insertion portion (2; 22; 32; 42; 52; 62) has a flat end (6; 26; 36; 46; 56; 66) provided with at least one groove to allow blood flow while inserting said endosseous implant in a dental bone .

10. Endosseous implant (1; 21; 31; 41; 51; 61) according to any one of the preceding claims,

characterized in that said threaded outer surface (3; 23; 33; 43; 53; 63) has a plurality of vertical grooves (5; 25; 35; 45; 55; 65) .

11. Endosseous implant (1; 21; 31; 41; 51; 61) according to any one of the preceding claims,

characterized in that the bottom portion (6; 26; 36; 46; 56; 66) of the endosseous implant (1; 21; 31; 41; 51; 61) has a saw-shaped surface (8; 28; 38; 48; 58; 68) .

12. Endosseous implant (1; 21; 31; 41; 51; 61) according to any one of the preceding claims,

characterized in that the bottom portion (6; 26; 36;

46; 56; 66) of the endosseous implant (1; 21; 31; 41; 51; 61) has a smooth surface, possibly with drainage grooves .

13. Endosseous implant (1; 21; 31; 41; 51; 61) according to any one of the preceding claims,

characterized in that a central cavity (7; 27; 37; 47; 57; 67) is provided on said bottom portion.