WO2018002950A1

WO2018002950A1 - Dental implant

Info

Publication number: WO2018002950A1
Application number: PCT/IN2017/000104
Authority: WO
Inventors: Vikrant Jain
Original assignee: Vikrant Jain
Priority date: 2016-06-27
Filing date: 2017-05-19
Publication date: 2018-01-04

Abstract

Tooth loss is a very common problem; therefore, the use of dental implants is also a common practice and to improvise the dental implants there is a lot of work involved in the use of better biomaterials, implant design, surface modification and its nationalization to improve the long-term outcomes of the treatment. An end osseous dental implant that includes a head, body, apex and a prosthetic platform, with anti- rotation polygonal engagement surface for securing parts like abutment, transfer abutment, cover screw, etc. These end osseous implants are made of medical grade titanium, titanium alloy or ceramic or any other biocompatible material comprising an elongated body with external-threads which get integrated with the bone over a period of time and act as an artificial root to support the crown. The dental implant may have abutments attached as one unit thus not requiring the abutments to be fixed at a later stage to support the crown.

Description

Title: DENTAL IMPLANT

Tapered endosseous dental implants with special external multiple thread design and salient features.

TECHNICAL FIELD OF THE INVENTION

The invention relates to a threaded dental implant with the aim to achieve better stability, workability and patient compliance.

SUMMARY OF THE INVENTION

The present invention is a combination of various salient features, to attain a threaded implant that can be placed with ease, minimal invasion, tissue conservation, good primary stability together with good bone adhesion and better load distribution.

Further objective of the invention is to provide a dental implant that is simple, inexpensive to produce, easy to handle with a good anchoring structure.

These dental implant are used to provide fixed or removable teeth/ prosthesis and or for anchorage, for the needful. Dental implants are fixed in the jaw bones of the needful once the osteotomy is performed in the jaw bone with the help of tools.

Dental implants mimic as artificial root on top of which the crown portion is fixed. Description

[001]This invention relates to endosseous dental implants with tapered external body with multiple threads on the implants. These threads may be V-shaped, square-shaped, buttress-shaped or some other shape.

[002] These implants may be two-piece which include an internal passage with internal threads, with one or more engaging surfaces

Or

[003]They may be one piece without an internal passage where the abutment is manufactured as one piece with the body of Implant.

[004]These endosseous implants are made of medical grade titanium, titanium alloy or ceramic or any other biocompatible material comprising an elongated body with different external-threads, having at least two different external thread regions with one it to be square thread having another thread over this square thread. The external body of implant may and/or may not have threads/grooves in between the square threads, the external body of the implant can also include a bevel or chamfer at or near the head /cervical/proximal end of the implant.

[005]The outer surface of the implant is modified by using different methods like grit blasting, acid etching, anodising to increase the surface area of the implant and making it rougher than the initial machined implant surface. The implant outer surface may or may not be coated to further modify its surface characteristics. [006]Further the apex/bottom of an implant is having a rounded external surface with a triangular punch/cavity or punch/cavity of any other shape. Or it may have slot/s.

[007]The body of the implant tapers over at least part of its length as it goes down from head/ cervical portion to bottom/apex of its linear length, is hollow from inside near the head/cervical side with internal threading and having polygonal or any other shape to engage abutment or other parts like transfer coping, gingival healer, etc. to the implant directly or by using a retaining screw.

[008]The collar of dental implant that is present proximal to the threaded area has a bevel which tapers from externally-threaded region inwardly towards the flat top of the implant body.

[009]Also the collar may have a polished surface in other

embodiments that extends above the crest of the bone and through the soft tissue into the oral cavity.

[010] As these implants are threaded or screwed into the jawbone of a patient, the multiple threads on the apical surface of the implant body enter first and cut threads in the osteotomy. When the threads of the implant body enter this opening, the implant can continue to be threaded and attain its final position giving initial stability to the implant in the host bone.

[01 l]These implant may come in different diameters and length.

DESCRIPTION OF THE DRAWINGS

[012]The above mentioned threaded endosseous dental implants can better be understood by reference to the drawings. The drawings are intended to illustrate, but not to limit the inventions.

[013]The drawings contain the following figures in which:

[014] Fig. 1 shows a side elevation view of a tapered-threaded endosseous dental implant with, externally-threaded body. [015]Fig. 2 shows a side elevation view of a tapered-threaded endosseous dental implant with, externally-threaded body with vertical flutes in the body of the implant. This Fig. 2 is same as that of Fig.l but is slightly rotated at the long axis of the implant.

[016]Fig. 3 shows a bottom view of the dental implant of Fig.l

[017]Fig. 4 shows a top view of the dental implant of Fig. 1

[018]Fig. 5 shows a cross sectional view of the dental implant of Fig.l

[019]Fig. 6 is a side view of yet another embodiment of the dental implant with abutment attached as one piece.

[020]Fig. 7 is a side view of yet another embodiment of the dental implant with grooves in between the square threads.

[021 ]A tapered endosseous dental implant in side elevation view Fig.l. Implant includes tapered body. However, the body can be cylindrical or otherwise shaped. Body A includes three externally- threaded regions (1), (2) and (3).

[022]Cervical/head portion, have an externally-threaded region (1) includes V-shaped threads, all of which have the same pitch.

[023]Body portion, have an externally-threaded region (2) includes square threads with spacing between adjacent threads is the same.

[024]Apical region, have an externally-threaded region (3) having V- shaped threads, the pitch of these threads is more than that of region

(1).

[025]These threads are helically extended over the body (B) of the implant (A) and in different variants may have more or less number of threads and their depth may also vary accordingly.

[026]Implant body (B) tapers from the cervical/ head area inwardly towards the apex/base/distal end (D) of the implant (A). [027] Apex or the base (D) of the implant body have a convex or rounded outer surface (4).

[028]Lower half of the implant body (B) has vertical flutes/slots (H) on the external surface of the body of implant.

[029]CoIlar (G) of dental implant, proximal to the threaded area (1), is bevel which tapers from externally-threaded region inwardly towards the flat top of the implant body.

[030]FIG. 3 shows a bottom view of the dental implant with a triangular cavity (I). It also shows vertical slots (H).

[031]FIG. 3B shows a bottom view of the dental implant with Slots (K) and vertical slots (H).

[032]FIG. 4 shows top view of the dental implant, where there is polygonal cavity (J) made in the body of dental implant below which the implant body is threaded (L) from inside.

[033JFIG. 5 shows a cross sectional view of the dental implant (A) showing the internal and outer designs in a cross section.

[034JFIG. 6 shows a side view of yet another embodiment of the dental implant with abutment attached (Abt.) as one piece.

[035]Fig. 7 is a side view of yet another embodiment of the dental implant with grooves (t) in between the square threads.

[036]Fig. 1-5 are of a dental implant (A). The implant (A) comprises a body (B), which has cervical/coronal/proximal end (C) and an apex/distal end (D). The implant (A) may be made of titanium or any other biocompatible material.

[037]The body (B) can be tapered or parallel walled and have threads (T) that are located on an outer surface of the implant. These threads (T) extends at a helical angle around the implant body (B), these threads can be of different size, designs and may increase or decrease in number. [038]The dental implant (A) comprise of a proximal portion (P) adjacent the proximal end (C), an apical/distal portion (E) adjacent to the distal end (D).

[039]In the illustration, proximal portion (P) has threads on its surface, these threads (F) have smaller pitch as compared to the threads (T) on the rest of the body of implant (A) and threads (V) present in the distal portion (E).

[040]In the illustration, the distal end (D) has a convex/ rounded contour (4) and has a triangular punch (I) / slot (K) in its base.

[041]The implant body (B) includes an outer surface (S) which comes in a direct contact with bone, and promotes osseointegration. The outer surface (S) is formed by roughening the implant body by several different techniques, like acid-etching, grit blasting, and lasers.

Outer surface (S) may also be coated with a substance such as

Calcium phosphate ceramics, tricalcium phosphate (TCP) and hydroxyapatite (HA) in order to promote osseointegration or to increase the surface properties.

[042]The collar (G) is at proximal portion (P) and is bevelled/reverse tapered in the illustration, however it can be parallel walled.

[043]In modified embodiments, the collar (G) can have

grooves/threads with different dimensions and configurations.

The collar (G) can be machined with no surface treatments done or is polished in other embodiments.

[044]In the Fig.l&2 threads (T) comprises a distal flank (d) and a proximal flank (p). Each thread (T) is square shaped and further has a thread/groove (t) on top of it, thus further increasing the surface area of each thread and better load distribution.

[045]Thread (T) begins at the proximal portion (P) and goes down the implant body at an helix angle with a constant pitch towards the distal portion (E). [046]However the numbers of threads (T) may increase or decrease according to different embodiment.

[047]Also there may be a groove located on the body of the implant in between these threads (T) below the area of internal connection interface in different embodiments as shown in Fig.7.

[048]Further in the illustrated embodiment, another shape of thread is present in the distal portion (E) of the implant (A) which are 'V- shaped and they start at that portion of implant where the threads (T) ends and these ' V- shaped (V)threads go down till the apical /distal end (D).

[049]Further with reference to Fig. 1 and Fig. 2, in the illustrated embodiment, the lower distal portion (E) of the dental implant (A) comprises three flutes (H) that are positioned along the long axis of the dental implant (A).

[050]The flutes (H) are configured to aid in inserting the dental implant. They also help as anti-rotation grooves.

[051]These three flutes (H) are at equal distance from each other located along the lower portion of the implant. In the illustrated embodiment, the flutes (H) can also help to cut, or remove bone.

[052]These flutes (H) are configured to cut or provide a tapping function when the dental implant (A) is rotated in a clockwise direction.

[053]As seen in Fig. 4 and 5, the dental implant (A) can also comprise a cavity (K) or internal connection interface made in the body of dental implant (A) that is open at the proximal end (C) of the dental implant (A). In the illustrated embodiment, the cavity (K) comprises a polygonal chamber (J) and a threaded chamber (L) below the polygonal chamber (J) to which an abutment, gingival former, cover screw or other prosthetic components can be attached. [054]However other embodiments may not have the cavity and instead has an abutment machined along with the dental implant (A) in one piece during implant manufacturing as shown in Fig. 6.

[055]Other embodiments may have different cavity designs with suitable shapes and forms.

[056]The internal connection interface comprises a side wall that slightly tapers inwardly in top portion of the implant with respect to long axis of the implant (A) providing a wide opening.

[057]In the Fig. 5 the thickness (g) of the collar (G), that is thickness as measured between the outer and inner periphery of the implant at the proximal surface (P) area at the position of cavity (J) is greater than at least 0.2 mm. however in other embodiments the thickness at the collar may vary.

[058]The dental implant (A2), shown in Fig. 6, comprise the same dental implant (A) described above. Only difference between the embodiment of the implant (A2) and the embodiment of the dental implant (A) is that the dental implant (A2) has an integrally formed abutment with the implant (A) in one-piece. This integrally formed abutment can be of any suitable shape and is generally made of titanium. However in different embodiments other suitable materials such as zirconia, etc. can also be used.

[059]Although this invention has been brought to light in the context of certain preferred embodiments and examples, it will be

comprehended by those who have knowledge and skill in the field that the present invention extends beyond the embodiments disclosed, to other possible embodiments and/or uses of the invention and obvious alterations, refinements and equivalents thereof.

[060]In addition, while the number of variants of the invention have been projected, other modified variants of the invention, which are within the scope of this invention, will be readily apparent to those who have knowledge and skill in the field based upon this disclosure. [061]It is also contemplated that various combinations or sub combinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the invention.

[062]It is invariably understood that multiple aspects of the disclosed embodiments can be combined with, or substituted for, one another in order to perform varying modes of the said invention. It is a deliberate intention that the scope of the present invention herein disclosed should not be limited by the particular disclosed embodiments described above, but should be determined only by a fair reading of the claims.

Claims

Claims I (inventor) claim:

1. An endosseous threaded dental implant, comprising of a body with external-threads, that comprises of at least two different external thread regions with one of them is a square thread having another thread over this square thread while the other can be a square with a different pitch or any other shape like V- shaped or any other design.

2. The dental implant of claim 1, wherein the external body of implant may and/or may not have threads/grooves in between the adjacent square threads.

3. The dental implant of claim 1, where in the external body of the implant may or may not have a bevel or chamfer at or near the head /cervical end of the implant.

4. The dental implant of claim 1 and or 2, wherein the apex/bottom of an implant is having a rounded/ convex external surface.

5. The dental implant of claim 4, wherein the apex/bottom of implant is having a triangular punch/cavity or punch/cavity of any other shape. Or it may have slot/s. This punch/cavity/slot may not be present in other embodiments.

6. The dental implant of claim 5, wherein said body of the implant is hollow from the head/cervical/ proximal side with internal threading and having polygonal or any other shape to engage abutment or other parts of prosthesis to the implant using a retaining screw. This hollow or passage may or may not terminate before reaching the bottom/apex of the implant.

7. The dental implant of claim 6, wherein said body of the implant is hollow from the head/cervical/ proximal side with internal threading and having polygonal or any other shape to engage parts like transfer coping, gingival healer, etc. to the implant directly or by using a retaining screw.

8. The dental implant of claim 7, where in the cervical end/head has a flat top surface which is perpendicular to the body of implant.

9. The dental implant of claim 8, wherein the dental component is made of medical grade titanium, titanium alloy or ceramic or any other biocompatible material.

10. The dental implant of claim 9, wherein said body tapers over at least part of its length as it goes down from head/ cervical portion to bottom/apex of its linear length.

11. The dental implant of claim 10, wherein dental implant may or may not have a polished collar that extend above the crest of the bone and through the soft tissue into the oral cavity.

12. The dental implant of claim 10 and claim 11, wherein dental implant can have different diameters and length and any dimensional modification to the above mentioned claims.