BR102016028989A2 - ODONTOLOGICAL MINI-IMPLANT AND ITS USE, SURGICAL KIT FOR APPLICATION OF THE MINI-IMPLANT, CAPSULE AND ITS USE - Google Patents

Abstract

The present invention relates to a dental mini-implant (1) comprising an o-ring ball-type upper attachment (1.1) in the upper portion thereof; a hexagonal connection system (1.2) for coupling the insertion keys; a cervical neck (1.3); a main body (1.4) of cylindrical shape; and an active tip (1.5). The main body comprises vertical, angled or helical chamfers that run from the cervical to the apical portion, which have a drill function to dispense with the use of several drills prior to the insertion of the mini-implant (1). further, the present invention relates to a surgical kit for applying mini-implant (1), a capsule (6) of polymeric overdenture material which does not require the presence of the o-ring to promote retention and its uses.

Description

(54) Title: DENTAL MINI-IMPLANT AND ITS USE, SURGICAL KIT FOR THE APPLICATION OF THE MINI-IMPLANT, CAPSULE AND ITS USE (51) Int. Cl .: A61C 8/00 (73) Holder (s): UNIVERSIDADE DE SÃO PAULO - USP (72) Inventor (s): ANDRÉA CÂNDIDO DOS REIS; MARIANA LIMA DA COSTA VALENTE; DENISE TORNAVOI DE CASTRO; JULIO CÉSAR SOUZA DA MATTA; RAPHAEL FREITAS DE SOUZA (57) Abstract: The present invention relates to a dental mini-implant (1) that comprises an upper oring ball-type attachment (1.1) in the upper portion thereof; a hexagonal connection system (1.2) to allow the insertion keys to be coupled; a cervical neck (1.3); a main body (1.4) of cylindrical shape; and an active tip (1.5). The main body comprises vertical, angled or helical chamfers that run from the cervical to the apical portion, which have the function of a drill to dispense with the use of several drills prior to the insertion of the mini-implant (1). Furthermore, the present invention relates to a surgical kit for the application of the mini-implant (1), a capsule (6) of polymeric material for overdentures that does not require the presence of the o-ring to promote retention and its uses.

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DENTAL MINI-IMPLANT AND ITS USE, SURGICAL KIT FOR THE APPLICATION OF THE MINI-IMPLANT, CAPSULE AND ITS USE

Field of the invention:

[1] The present invention falls within the field of application of medical science, more specifically dentistry, since it refers to a mini dental implant that comprises chamfers that confer the function of drill. In addition, the present invention also relates to a surgical kit for the application of said mini-implant, as well as an overdenture capsule without o-ring and its use.

State of the art:

[2] Osseointegration is microscopic direct contact of the bone / implant interface without the interposition of fibrous tissue. This phenomenon is the main criterion for the success of implant rehabilitation.

[3] With the emergence of osseointegration, many researchers sought to develop different implant systems, using the most diverse materials. For many years, due to numerous failures in the use of implant systems and the lack of controlled clinical studies, the use of these materials has remained restricted to a small portion of the dental community.

[4] Over the years and the development of research in the area, implants have undergone an evolution in terms of format, material, surface treatment, prophetic platform and surgical technique.

[5] Dental mini-implants are dental implants that have the function of fixing or retaining overdentures or overdentures. In this quick procedure,

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2/12 small diameter titanium screws with single body ball attachment are placed in the jaw, usually with local anesthesia. When immediate loading is possible, the installation of the denture can be performed at the same time as the placement of the implants.

[6] The mini dental implant has emerged as an attractive alternative to replace traditional implants in cases of patients who have health problems and who cannot support the surgical procedure caused by traditional implants.

[7] Dental implants for denture stabilization have become increasingly popular in recent years. Data show that the placement of two implants in the anterior region of the jaw can make a big difference in the quality of life of patients, and can help maintain the jaw bones, which after losing teeth tend to lose their volume.

[8] However, for many patients, traditional dental implants are not a viable option, as they are associated with surgeries with flap opening and high postoperative morbidity such as pain, swelling, edema, increased risk of bleeding. In addition, they require greater quantity and bone quality for their installation. Thus, for some patients the implant placement procedure may be contraindicated, very traumatic and may require a long time to heal.

[9] US6716030 describes a dental mini-implant with an o-ring ball attachment end. However, the body of the mini-implant is straight and for insertion it is necessary to make a series of perforations in the

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3/12 bone bed of the patient until he finds the most appropriate place for the implant stabilization, which is in most cases not very stable, due to the conventional shape of the turns.

[10] MU 8403305-3 describes a mini-implant that has turns in its body, and a button-shaped end for the application of orthodontic anchorage. However, it has a temporary character and, for this reason, does not undergo osseointegration, therefore it cannot be used to support overdentures.

[11] As can be seen, the state of the art does not include any mini-implant that has an innovative shape that increases the stabilization of the implant when it is inserted in the medullary region of the bone.

[12] In order to overcome the existing difficulties in the state of the art regarding the insertion of mini-implants, the present invention proposes mini-implants with macro-structural changes in the turns, that is, the mini-implants have longitudinal chamfers, which give them the drill function that allows for even greater facilitation of the technique and maximum reduction of their costs. Associated with this, it is also possible to reduce the costs of the materials involved in the surgical procedure, certain macrogeometries do not require a large number of drills for bone drilling, providing numerous advantages such as less bone tissue wear, decreased material costs, reduced operative stress and accelerated osseointegration process.

[13] In addition to the importance of implants, the relevance of the materials involved in the

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4/12 insertion of the same, as the surgical kits. Most implant manufacturers sell kits with a large number of equipment, which in most cases are not essential for the installation of the implants, and which generate a high cost for the treatment.

[14] Due to the small size and its chamfers, the proposed mini-implants require only a single spear-type drill for their installation, which allows the manufacture of surgical instruments with reduced material and greater technical ease.

[15] Thus, the mini-implant itself will, after drilling the bone cortex with the spear drill, open the bone bed and compact the lateral bone for its immobilization, without removing tissue, helping with remodeling, subsequent healing and osseointegration and bringing numerous post-operative benefits to the patient.

[16] Regarding the prophetic part, the essential difference between overdentures and conventional prostheses is in the retaining capsule fixed to the denture base, which differs depending on the type of attachment used, o-ring ball, bar clip, magnetic or a combination of both. Although the bar-type attachments are indicated in order to improve retention, the o-rings have advantages, such as: ease of insertion / removal, hygiene, easy maintenance, low cost and elimination of the superstructure of the bar, justifying its use in geriatric patients . There are, however, some disadvantages to these systems, such as the gradual loss of retention due to wear of the o-ring and the need for

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5/12 periodic substitutions.

[17] US6716030 also describes capsules of metallic material that have intermediate portions, such as rubber for damping (o-ring).

[18] Thus, the present invention proposes a capsule with polymeric material, which does not require o-rings, thus greatly reducing costs in relation to the conventional prosthetic component that is generally metallic and depends on the sealing element to perform its function, eliminating the problem of changing this material, since the polymeric capsule would resist for a longer period of time.

[19] However, US2012058448 describes an O-ring mini-implant attachment made of polymeric material that does not need the rubber sealing ring. However, it differs from the present invention, since it is associated with the use of orthodontic mini-implants, that is, they are temporary and do not interact with bone tissue. In addition, the capsules referred to in the document are used inside temporary teeth, have no mechanical retention, are cemented to the implant, also temporarily, to contain the anodontic space of individual and individual teeth before definitive rehabilitation.

[20] In contrast, the capsule proposed by the present invention is indicated for overdentures, used in their stabilization and retention, and the characteristics of the capsule known in the state of the art preclude its use associated with removable overdentures.

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Brief description of the invention:

[21] The present invention relates to a mini dental implant that comprises an upper attachment type o-ring ball in the upper portion of it; a hexagonal connection system to allow the insertion keys to be coupled; a cervical neck; a main body of cylindrical shape; and an active tip. The main body comprises vertical, angled or helical chamfers that run from the cervical to the apical portion.

[22] Furthermore, the present invention relates to a surgical kit consisting of a box comprising a spear drill, an adapter for the torque wrench with an internal connection similar to the upper portion of the mini-implant and a torque wrench, with a square connection.

[23] In addition, the present invention relates to a polymeric material capsule for overdentures that does not require the presence of the o-ring to promote retention.

Brief description of the figures:

[24] In order to obtain a total and complete visualization of the object of this invention, the figures to which reference is made are presented, as follows.

[25] Figure 1A-B represents two of the possibilities of macrogeometries for the mini-implants of the present invention.

[26] Figure 2A-B represents two of the models of spear-type drills that can be used to make the hole.

[27] Figure 3A-B represents the attachment adapter for the torque wrench in external front view and

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7/12 internal.

[28] Figure 4 represents the torque wrench for inserting the screw.

[29] Figure 5 represents an illustration of the kit of the present invention consisting of a drill bit, an adapter and a torque wrench.

[30] Figure 6A-B represents an external and internal front view of the capsule model of overdentures without o-rings for the o-ring ball attachment.

Detailed description of the invention:

[31] The present invention relates to a single-body dental mini-implant (1) comprising:

- an upper attachment type o-ring ball (1.1);

- a connection system (1.2);

- a cervical neck (1.3);

- a main body (1.4) of cylindrical shape;

- an active tip (1.5).

[32] The said mini-implant (1) has a size ranging from 1.5 to 3 mm in diameter.

[33] The upper attachment type o-ring ball (1.1) is located in the cervical region of the implant (1) and aims to allow retention of the implant to the prosthesis by means of a capsule, which is inserted in its internal base, thus contributing to its stabilization.

[34] Thus, the o-ring ball attachment (1.1) is the connecting element between the implant (1) and the capsule as if it were a male-female fitting, where the male is the attachment and the female the capsule.

[35] The connection system (1.2) can be hexagonal, hexagonal, square or triangular for coupling the

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8/12 tool for applying torque to the implant.

[36] The main body (1.4) comprises vertical, angled or helical longitudinal chamfers, with no difference in the effect generated by them, since this terminology applies only to clarify that the present invention can cover any of the types of chamfers, which can also be sharp or not, continuous or intermittent, double or triple and equidistant from each other, with turns or not, which end in an active point (1.5).

[37] Also, as the implants (1) comprise the dimensions of 1.5 to 3 mm in diameter, the dimensions of the chamfers are proportional to these measures, that is, they vary from 0.5 mm to the smallest diameter at 0, 75 mm for the largest. As for the material, it is recommended to make an implant (1) with metallic material, preferably titanium. Still, it is worth mentioning that all the variations of the mini-implants (1) described here have chamfers in their body.

[38] The said chamfers confer the function of a drill, eliminating the use of several drills prior to the insertion of the mini-implant, which drill at the expense of removing bone tissue.

[39] Thus, the mini-implant itself (1) will perform, after drilling the bone cortex, the opening in the bone bed and lateral bone compaction for its immobilization, without the removal of tissue, assisting in remodeling, subsequent healing and osseointegration and bringing numerous post-operative benefits to the patient.

[40] Figure 1 A-B represents two examples of the mini-implant (1), but it is not limited by the referred

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9/12 examples.

[41] Thus, in addition, the present invention relates to a surgical kit for the application of the mini-implant (1) of the present invention, which comprises in a box (5):

- a drill (2);

- an adapter (3); and

- a torque wrench (4).

[42] The drill (2) comprises a portion of the part that is coupled inside the contra-angle (2.1); a drill body (2.2) which is preferably cylindrical, helical or angled; and an active tip of the drill (2.3) which is preferably formed by cutting chamfers, helical or not.

[43] Still, the referred drill (2) has the exclusive purpose of the lance function for the initial drilling of bone tissue (cortical bone), for posterior insertion of the mini-implant (1) of the present invention.

[44] Figure 2 A-B illustrates two examples of the spear drill (2), but it is not limited by these examples.

[45] The adapter (3) comprises a connection (3.1) square or not that will be attached to the torque wrench (4) during the insertion of the mini-implant (1); an adapter region (3.2) which internally the ball of the o-ring type attachment (1.1) is positioned; and a main body (3.3) in which the mini-implant connection system (1.2) is internally located for the positioning of the adapter itself (3).

[46] Figure 3 represents an external front view

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10/12 (3Α) and internal (3B) of said adapter (3).

[47] The torque wrench (4) comprises a connection (4.1) that has a square shape or not that fits with the adapter (3); a body (4.2); a rod (4.3) responsible for measuring the torque of the mini-implant (1); the change measurements in N.cm (4.4); a tip (4.5) of the torque measuring rod; and an indicator (4.6) of the direction (clockwise or counterclockwise) of torque application.

[48] Figure 4 illustrates the torque wrench included in the surgical kit of the present invention.

[49] Also, the referred surgical kit consists of a box (5) of autoclavable material, which can be made of polypropylene, stainless steel boxes with thin walls, aluminum or disposable, as polymers resistant to high temperatures; of sufficient size to comprise a drill (2), an adapter (3) and a torque wrench (4) as described herein.

[50] Thus, Figure 5 represents an illustration of the present surgical kit.

[51] It is noteworthy that the aforementioned parts (drill (2), adapter (3) and torque wrench (4)) included in the present kit are made of biocompatible materials and of high mechanical resistance, such as titanium, titanium alloy, stainless steel, polyacetal, teflon, resins, zirconia or other ceramic materials, according to the ASTM F899 standard, which refers to the resistance of surgical materials such as stainless steel.

[52] Additionally, the present invention relates to a capsule (6) of polymeric material for fitting in mini-implants with o-ring ball type attachments,

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11/12 preferably the mini-implant (1) of the present invention, in which the polymeric material is selected from the group consisting of polytetrafluoroethylene (known commercially as Teflon), polyethylene and polyethylene terephthalate (known by the acronym PET and commercially as DACRON ).

[53] Said capsule (6) comprises a portion (6.1) that is exposed to the oral cavity with a square connection or not; a constriction (6.2) of the capsule responsible for retaining it in the internal base of the prosthesis; and a base (6.3) that is positioned internally in the resin.

[54] Figure 6 represents an external (6A) and internal (6B) front view of said capsule (6).

[55] Thus, the present invention relates to the use of said capsules (6) for application on the internal base of overdentures prostheses.

[56] Thus, for the use of the capsule (6) of the present invention it is not necessary to use the o-ring that ordinary capsules use. With this, it will be retained for a longer time, prolonging the periodicity of exchange and, consequently, reducing treatment costs.

[57] Therefore, the mini-implant and its variations proposed by the present invention have a configuration that allows them to be used as drills to reduce the amount of cutters required for drilling bone tissue and, thus, reducing damage to it.

[58] Another indication for these mini-implants is the regions of great bone atrophy, mainly of the mandible, which prevent the installation of implants without previous bone grafting procedures, surgeries of great morbidity for the patient. This will be

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12/12 possible due to the reduced diameter of these mini-implants.

[59] Thus, with the reduction in the number of drills for insertion, the technical facility will greatly increase and the costs for oral rehabilitation with prostheses on these implant models will decrease substantially allowing its reach to a large portion of the population.

[60] Another advantage of mini-implants of the present invention over conventional ones is minor bone resorption. Standard diameter screws (3.4mm to 5mm) have prophetic platforms that cause gaps between them and the connection elements with the prostheses, impairing biomechanics and favoring the accumulation of bacteria. The proposed mini-implants, on the other hand, have a unique body, favoring the maintenance of bone tissue in height and hindering the colonization of microorganisms.

[61] Regarding the surgical kit developed, its main purpose will be to facilitate the technique by not using a large number of devices and reducing costs, since they are usually composed of several materials, often dispensable and that increase the cost of the product exorbitantly.

[62] Those skilled in the art will value the knowledge presented here and will be able to reproduce the invention in the modalities presented and in other variants, covered by the scope of the attached claims.

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Claims (2)

1/4 Petition 870160074291, of 12/09/2016, p. 30/34 1. Dental mini-implant (1) characterized by the fact that it is a single body and comprises: - an upper O-ring ball attachment (1.1), - a connection system (1.2), - a cervical neck (1.3), - a main body (1.4) with a cylindrical shape and - an active tip (1.5) in which the main body (1.4) comprises vertical, angled or helical longitudinal chamfers, which are sharp or not, continuous or intermittent, double or triple and equidistant from one another, with turns or not, end at an active end (1.5). 2. Dental mini-implant (1), according to claim 1, characterized by the fact that it is metal, preferably titanium and has a size ranging from 1.5 to 3 mm in diameter. 3. Mini implant (1) dental, wake up with The claim 1 or 2 , characterized by fact in at dimensions of chamfers be proportionate to size of mini-implant ( 1), in ranging from 0.5 mm to smaller diameter at 0.75 mm for the biggest. 4. Mini implant (1) dental, wake up with The claim 3, characterized by the fact that said chamfers confer the function of drill and dispense with the use of several drills prior to the insertion of the mini-implant (1). 5. Mini dental implant (1), according to claim 1, characterized by the fact that the upper o-ring ball attachment (1.1) is located in the region Petition 870170006175, of 01/30/2017, p. 3/5 2/3 in a deal with The in the system in ^, square or in application of cervical of the implant (1) and be the connecting element between the implant (1) and a capsule inserted in the internal base of a prosthesis. 6. Dental mini-implant (1) claim 1, characterized by the fat connection (1.2) being hexagonal, hexagonal, triangular for coupling the torque tool to the implant. 7. Use of the mini-implant (1), as defined in any of claims 1 to 6, characterized by the fact that, after drilling the bone cortex, the opening in the bone bed and lateral bone compaction for its immobilization, without the tissue removal, aiding remodeling, subsequent healing and osseointegration. 8. Surgical kit for the application of the mini-implant (1), as defined in any one of claims 1 to 6, characterized by the fact that it comprises in a box (5): - a spear-type drill (2); - an adapter (3); and - a torque wrench (4). 9. Surgical kit, according to claim 8, characterized by the fact that the box (5) is made of autoclavable material selected from the group consisting of polypropylene, stainless steel, aluminum, polymers resistant to high temperatures; or disposable material; in which its size is sufficient to comprise a drill (2), an adapter (3) and a torque wrench (4). 10. Capsule (6) to fit mini-implants with o-ring ball type attachments, preferably the miniPetition 870170006175, from 01/30/2017, p. 4/5 3/3 implant (1), as defined in any one of claims 1 to 6, characterized by the fact that it is made of polymeric material selected from the group consisting of polytetrafluoroethylene, polyethylene and polyethylene terephthalate; and comprise a portion (6.1) that is exposed to the oral cavity with a square connection or not; a constriction (6.2) of the capsule responsible for retaining it in the internal base of the prosthesis; and a base (6.3) that is positioned internally in the resin. 11. Use gives capsule (6), as defined at claim 10, characterized by the fact to be for application in base internal prosthesis overdentures with absence of use of o-ring. Petition 870170006175, of 01/30/2017, p. 5/5 2/4 θ Γ ~ Β ~ 1