LU93186B1

LU93186B1 - Dental implant plate for maxillary atrophies

Info

Publication number: LU93186B1
Application number: LU93186A
Authority: LU
Inventors: Henri Diederich
Original assignee: Henri Diederich
Priority date: 2016-08-29
Filing date: 2016-08-29
Publication date: 2018-03-28
Also published as: WO2018041574A1

Abstract

The invention is directed to a dental implant plate (2) for bonding a dental prosthesis to a maxilla of a patient, comprising a central portion (4) with a fixation element (6) for supporting the prosthesis; a first arm (8) extending from the central portion (4) along a longitudinal axis (L), said arm (8) comprising at least one fixation hole (10); and a second arm (12) extending from the central portion (4) in a direction opposite to the first arm (8); said second arm (12) comprising at least one fixation hole (10). The central portion (4) comprises two generally parallel side edges (14) and two ends (16), each end (16) comprising at least two branches (18) interconnecting said portion (4) with the corresponding arm of the first and second arms (8, 12). (Figure 1) 93186

Description

DENTAL IMPLANT PLATE FOR MAXILLARY ATROPHIES

Technical field [0001] The invention is directed to the field of dentistry. More specifically, the invention is directed to a dental implant plate for an atrophic maxilla.

Background art [0002] In the field of dentistry, dental implants are usually directly fixed in the maxillary or in the mandibular crest by a screw configured to carry the artificial tooth. However, in case of atrophic maxilla or mandible, the fixation of the dental implant become difficult because of the lack of sufficient bone volume and it requires sometime a bone graft or a sinus lift.

[0003] Prior art patent document published WO 2013/093927 A1 discloses a dental implant consisting of a metal plate. The plate is used for dental implants in case of atrophic maxilla or mandible. The plate is moulded in the mouth of the patient and is fixed in the mouth at three different points. In case of the maxilla, the plate is fixed on the palatal side, on the alveolar crest and on the zygomatic buttress. However, it requires each time to mould and to create a specific plate according to the patient. Moreover, the plate is not adaptable everywhere on the maxilla.

[0004] Prior art patent document published WO 2015/001137 A1 discloses a system for securing a dental prosthesis in case of severe osseous atrophies. A plate is positioned in the oral cavity and is fixed in a single bone at a distance of the alveolar crest, by means of at least one anchorage in the form of a screw. This construction is voluminous, invasive and its application is limited.

[0005] Prior art patent document published US 5,052,930 A discloses a juxtaosseous implant for application to the mandible or maxilla. The dental implant has a central portion supporting the artificial tooth and branches configured to be screwed into a bone at points removed from the central portion. This configuration is limited to fixations in maxilla or mandible with a sufficient bone volume and cannot be used in case of atrophic bone.

[0006] Prior art patent document published WO 2015/063625 A1 discloses a dental implant comprising a main body configured to be implanted in a mandibular or maxillary bone and protruding portions projecting radially outwardly. However, with this configuration, the dental implant is directly fixed in the maxilla or mandible and cannot be used in case of atrophic bones.

Summary of invention

Technical Problem [0007] The invention has for technical problem to provide a solution to at least one shortcoming of the mentioned prior art. More particularly, the invention has for technical problem to provide a dental implant plate for bonding a dental prosthesis in case of maxillary atrophies. The invention has also for technical problem to provide a dental implant plate for maxillary atrophies which provides a good conformability of the dental implant plate on the implantation site and avoids deformations of said plate. The invention has also for technical problem to provide a cost and time effective solution for bonding a dental prosthesis to an atrophic maxilla.

Technical solution [0008] The invention is directed to a dental implant plate for bonding a dental prosthesis to a maxilla of a patient, comprising a central portion with a fixation element for supporting the prosthesis; a first arm extending from the central portion along a longitudinal axis, said arm comprising at least one fixation hole; and a second arm extending from the central portion in a direction opposite to the first arm; said second arm comprising at least one fixation hole; wherein the central portion comprises two generally parallel side edges and two ends, each end comprising at least two branches interconnecting said portion with the corresponding arm of the first and second arms.

[0009] According to a preferred embodiment, the at least two interconnecting branches comprise two lateral branches forming the two side edges of the central portion.

[0010] According to a preferred embodiment, the at least two interconnecting branches comprise at least one, preferably two central branches extending between the two lateral branches.

[0011] According to a preferred embodiment, each end of the central portion comprises at least one, preferably at least two apertures laterally between the interconnecting branches.

[0012] According to a preferred embodiment, each of the at least two apertures extends longitudinally from the corresponding end of the central portion to the fixation element.

[0013] According to a preferred embodiment, each end of the central portion comprises a hole on the longitudinal axis.

[0014] According to a preferred embodiment, each of the apertures and/or the holes is configured for promoting osteoblasts growth there-through.

[0015] According to a preferred embodiment, each of the first and second arm comprises at least two lateral fixation holes laterally to, and on opposite sides of, the longitudinal axis.

[0016] According to a preferred embodiment, the first and/or the second arm comprises at least three of the at least one fixation hole, said holes being on the longitudinal axis.

[0017] According to a preferred embodiment, the at least two lateral fixation holes of each of the first and second arm are aligned with an axial fixation hole of each said arms along a transversal axis that crosses the longitudinal axis.

[0018] According to a preferred embodiment, the first and/or the second arms are generally cross-shaped.

[0019] According to a preferred embodiment, each of the first and second arm comprises lateral edges that are generally corrugated around the fixation holes of said each arm.

[0020] According to a preferred embodiment, each of the first and the second arm is dimensioned and configured such that said each arm can be folded, twisted and/or cut.

[0021] According to a preferred embodiment, the side edges of the central portion are generally straight.

[0022] According to a preferred embodiment, each of the interconnecting branches has a mean width comprised between 0.4 and 1 mm preferably, comprised between 0.5 and 0.7 mm.

Advantages of the invention [0023] The invention is particularly interesting in that the dental implant plate provides a solution for bonding a dental prosthesis in an atrophic maxilla, without performing any graft bone or sinus lift. The dental implant plate comprises a central portion having two generally parallel side edges and two ends, each end comprising at least two branches interconnecting said portion with the corresponding arm of the first and second arms. The configuration of the central portion provides a good conformability of the dental implant plate on the implantation site. Moreover, the at least two branches consolidate the junction between the central portion and each of the first and second arms and avoids deformation or movements of the dental implant plate, notably occurring during mastication for example. The configuration of the dental implant plate allows its fixation in the premaxillary area or in the fossa canine of the maxilla.

Brief description of the drawings [0024] Figure 1 illustrates a top view of the dental implant plate in accordance with the invention; [0025] Figure 2 is a profile view of the dental implant plate according to Figure 1 ; [0026] Figure 3 is a representation of a lateral face of an atrophic maxilla on which is fixed the dental implant plate; [0027] Figure 4 is a bottom view of figure 3.

Description of an embodiment [0028] With reference to the attached figures 1 and 2, reference 2 shows the dental implant plate according to the invention. The dental implant plate 2 is used for bonding a dental prosthesis to a maxilla of a patient. The dental implant plate 2 comprises a central portion 4 with a fixation element 6 for supporting the prosthesis (not shown). The dental implant plate 2 comprises a first arm 8 comprising at least one fixation hole 10 of the dental prosthesis and extending along a longitudinal axis L. The dental implant plate 2 also comprises a second arm 12 extending from the central portion 4 in a direction opposite to the first arm and comprising at least one fixation hole. The fixation holes 10 are configured to receive fixation means (not shown) of the dental implant plate, such as osteosynthesis screws.

[0029] The central portion 4 of the dental implant plate 2 comprises two generally parallel sides edges 14 and two ends 16. The side edges 14 of the central portion 4 are generally straight. Each end 16 comprises at least two branches 18 interconnecting the central portion 4 with the corresponding arm of the first and second arms 8 and 12. More particularly, the at least two interconnecting branches 18 can comprise two lateral branches 20 forming the two side edges 14 of the central portion 4.

[0030] The at least two interconnecting branches 18 comprises at least one, preferably two central branches 22 which extend between the two lateral branches 20 of the central portion 4. Each of the interconnecting branches 18 can have a mean width comprised between 0.4 and 1 mm, preferably comprised between 0.5 and 0.7 mm. More preferably, each of the central branches 22 has a width of 0.6 mm and each of the lateral branches has a width of 0.5 mm.

[0031] Each end 16 of the central portion 4 can comprise at least one aperture 24, preferably two apertures laterally between the interconnecting branches 18. The at least two apertures 24 extend longitudinally from the corresponding end 16 of the central portion 4 to the fixation element 6. Each end 16 of the central portion 4 also comprises one hole 26 on the longitudinal axis L. In order to allow a spontaneous regeneration of the patient’s bone after the fixation of the dental implant plate, each of the holes 26 and/ or the apertures 24 can be configured for promoting growth of osteoblasts there-through. The osteoblasts growth provides a supplementary fixation of the dental implant plate in the bone.

[0032] The first and/or the second arm 8 and 12 comprise at least three of the at least one fixation hole. The at least three fixation holes 10.1 of each arm are on the longitudinal axis L. Each of said arms 8 and 12 also comprises at least two lateral fixation holes 10.2 laterally to, and on opposite sides of, the longitudinal axis L. The at least two lateral fixation holes 10.2 of each of the first and second arms 8 and 12 are aligned with an axial fixation hole 10.1 of each said arms 8 and 12 along a transversal axis T or T’ that crosses the longitudinal axis L. The axial fixation holes 10.1 and the lateral fixation holes 10.2 of each arm provide a cross-shape of each arm 8 and 12. Each of the first and the second arms 8 and 12 is dimensioned and configured such that said each arm can be folded, twisted and/or cut, in order to conform said dental implant plate 2 to contours of the implantation site. The first and the second arms can have the same length. They can have a length comprised between 13 and 16 mm, preferably comprised between 14 and 15 mm.

[0033] Each of the first and the second arm 8 and 12 comprises lateral edges 28 that are generally corrugated around the fixation holes 10.1 and 10.2 of each of the first and the second arms 8 and 12. The lateral edges 28 can have a width comprised between 0.8 and 1 mm, more particularly the width can be of 0.9 mm. The fixation holes 10 and 26 can have a diameter comprised between 2 and 3 mm, preferably comprised between 2.5 and 3 mm. More particularly, the diameter of the fixation holes can be of 2.6 mm.

[0034] The central portion 4 can have a length comprised between 11 and 13 mm, more preferably the length can be of 12 mm.

[0035] The dental implant plate 2 can have a length comprised between 40 and 42 mm, preferably the length is of 41.4 mm. The dental implant plate 2 can be made of biocompatible material having sufficient malleability and flexibility in order to allow the folding of the first and the second arms 8 and 12 relatively to the central portion 4. The dental implant plate 2 can be made in titanium, preferably in titanium grade 2. The thickness of the dental implant plate can be comprised between 0.5 and 0.8 mm, more specifically the thickness can be of 0.6 mm.

[0036] The fixation element 6 for supporting the dental prosthesis (not shown) can have a height comprised between 4 and 5 mm, preferably the height is of 4.6 mm. The fixation element 6 can have a depth comprised between 2.5 and 3 mm. The depth can be of 2.8 mm.

[0037] Figure 3 and figure 4 respectively illustrates a lateral face and a bottom view of an atrophic maxilla 30, on which is fixed the dental implant plate 2 according to the invention. The dental implant plate 2 is placed over the maxilla such that the fixation element 6 is placed where the prosthesis should be. The dental implant plate 2 is placed transversally to the jaw. Each of the first and the second arms 8 and 12 is folding relative to the central portion 4 by means of the interconnecting branches. Thanks to their configuration, the first and the second arms 8 and 12 can be fixed in an area of the maxilla remote from the atrophic area. The first arm is fixed on the external surface of the maxillary bone. More particularly, the first arm 8 can be fixed in the premaxillary area or in the canine fossa (figure 3) . The second arm 12 is fixed on the internal surface of the maxilla (figure 4) . The interconnecting branches allow the dental implant plate 2 to comply with contours of the implantation site and avoid deformations of the dental implant plate. Each of the first and the second arm 8 and 12 are fixed with fixation means 32, preferably osteosynthesis screws, configured to pass through the fixation holes. Moreover, the cross shape of the first and the second arm 8 and 12 provides fixations of the dental implant plate in two directions.

Claims

A dental implant plate (2) for connecting a dental prosthesis to a maxillary bone (30) of a patient, comprising: - a central portion (4) with a fixation member (6) for supporting the prosthesis; - a first arm (8) extending from the central portion (4) along a longitudinal axis (L), said arm comprising at least one fixing hole (10); and - a second arm (12) extending from the central portion (4) in a direction opposite to the first arm (8); said second arm (12) comprising at least one attachment hole (10); characterized in that the central portion (4) comprises two generally parallel lateral edges (14) and two ends (16), each end comprising at least two branches (18) interconnecting said portion with the arm corresponds to first and second arms (8). , 12).

Dental implant plate (2) according to claim 1, wherein the at least two interconnecting legs (18) comprise two lateral branches (20) forming the two lateral edges (14) of the central portion (4). .

Dental implant plate (2) according to claim 2, wherein the at least two interconnecting legs (18) comprise at least one, preferably two central branches (22) extending between the two lateral branches ( 20).

Dental implant plate (2) according to any one of claims 1 to 3, wherein each end (16) of the central portion (4) comprises at least one, preferably at least two openings (24) laterally. between the interconnecting branches (18).

The dental implant plate (2) according to claim 4, wherein each of the at least two openings (24) extends longitudinally from the corresponding end (16) of the central portion (4) to the fixing (6).

The dental implant plate (2) according to any one of claims 1 to 5, wherein each end (16) of the central portion (4) comprises a hole (26) on the longitudinal axis (L).

The dental implant plate (2) according to any one of claims 4 to 6, wherein each of the openings (24) and / or the holes (26) is configured to promote the growth of osteoblasts therethrough.

The dental implant plate (2) according to any one of claims 1 to 7, wherein each of the first and second arms (8, 12) comprises at least two lateral attachment holes (10.2) laterally, and on opposite sides to the longitudinal axis (L).

The dental implant plate (2) according to any one of claims 1 to 8, wherein the first and / or second arm (8, 12) comprises at least three of the at least one fixation hole, said holes (10.1) being on the longitudinal axis (L).

The dental implant plate (2) according to claims 8 and 9, wherein the at least two lateral attachment holes (10.2) of each of the first and second arms (8, 12) are aligned with an axial attachment hole. (10.1) of each of said arms (8, 12) along a transverse axis (T, T ') which crosses the longitudinal axis.

The dental implant plate (2) according to claim 10, wherein the first and / or second arm (8, 12) are generally cross-shaped.

The dental implant plate (2) according to any one of claims 1 to 11, wherein each of the first and second arms (8, 12) comprises side edges (28) which are generally corrugated around the fixation holes (10). ) of each of said arms (8, 12).

The dental implant plate (2) according to any one of claims 1 to 12, wherein each of the first and second arms (8, 12) is sized and configured such that each of said arms can be bent, twisted and / or cut.

The dental implant plate (2) according to any one of claims 1 to 13, wherein the side edges (14) of the central portion (4) are generally straight.

Dental implant plate (2) according to any one of claims 1 to 14, wherein each of the interconnecting branches (18) has an average width of between 0.4 and 1 mm, preferably between 0.5 and 0.7 mm.