Prosthetic component for zygomatic implants

Abstract

The present invention relates to a prosthetic component for dental implants, and more specifically to a prosthetic component for zygomatic implants for use in dental implant surgery in the zygomatic bone via intraoral access. The prosthetic component for zygomatic implants (100) comprises a dental implant configured to be anchored in the zygomatic bone, an intermediate connection element (20) having a curved shape, wherein a first end (21) of the intermediate connection element (20) is configured to be coupled directly or indirectly to the dental implant, and wherein a second end (22) of the intermediate connection element (20) is configured to be coupled directly or indirectly to a prosthetic abutment (40a, 40b).

Description

[0001] Prosthetic component for zygomatic implant.

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to a prosthetic component for dental implants, more precisely to a prosthetic component for zygomatic implants for dental implant surgeries in the zygomatic arch bone via intraoral access.

[0004] BACKGROUND OF THE INVENTION

[0005] Dental implant components, or simply dental implants, are metal structures or supports, usually made of titanium, surgically positioned in facial bones such as the maxilla and mandible, replacing tooth roots or, in the case of fixation in the zygomatic bone where there are no roots, serving as support for attaching the prosthesis assembly.

[0006] The use of prosthetic components for zygomatic implants through surgical techniques promotes oral rehabilitation in the maxilla, since implants are fixed to the zygomatic bone. This type of technique is usually indicated for patients with severe bone loss in the upper jaw caused by tooth loss. This severe bone loss is often due to bone resorption from inflammation or prolonged absence of masticatory function, making it impossible to fabricate complete dentures, leading the patient to functional and social problems (difficulty eating and speaking) and psychological problems (embarrassment due to missing teeth and communication difficulties). The solution presented has the advantage of providing a possible treatment for cases of atrophic maxillae.

[0007] Dental implants configured for anchorage in the zygomatic bone are already known in the state of the art. Figure 1 shows, for illustrative purposes only, a set of intermediate components 1 of a prosthetic component for implantation, i.e., components located between a dental implant and a dental prosthesis (not illustrated).

[0008] The prior art document CN112826618 discloses a curved transzygomatic implant structure, in which the implant body is curved to be closer to the anterior and lateral concave walls of the maxillary sinus or partially embedded in the maxilla. The inner wall of the anterior and lateral walls keeps the body away from the soft tissue layer of the oral cavity and reduces the incidence of oral cavity exposure. This structure is primarily intended for patients with obvious depression of the anterior and lateral walls of the maxillary sinus or for patients with severe vertical and horizontal maxillary resorption.

[0009] The state-of-the-art document BR 10 2017 020639-4 discloses an intermediate dental prosthetic component, consisting of two parts that are joined by a screw thread, applicable to zygomatic implants. The implants are screwed into place through a surgical procedure in an intraoral procedure, surgically installed in conjunction with an anti-rotational prosthetic element of the Morse taper type. This method is indicated for patients with significant bone loss who cannot undergo bone grafting procedures.

[0010] The state-of-the-art document BR 10 2022 021558-8 discloses a zygomatic prosthetic component capable of being adapted to the specific needs of each patient, wherein the zygomatic implant prosthetic component comprises a dental implant configured to be anchored in the zygomatic bone; an intermediate connecting element comprising a curved shape, wherein a first end of the intermediate connecting element is coupled directly or indirectly to the dental implant; a first extender, wherein the first extender is coupled to a second end of the intermediate connecting element; a prosthetic abutment, wherein a first end of the prosthetic abutment comprises an external thread, wherein the external thread of the prosthetic abutment is coupled to a first internal thread of the intermediate connecting element; and wherein a second end of the prosthetic abutment is configured to receive a dental prosthesis.

[0011] In general, the use of these conventional, state-of-the-art implants offers advantages, such as:

[0012] - low surgical morbidity;

[0013] - simplicity, which allows the procedure to be performed in a non-hospital setting and promotes an increase in the number of professionals who use it; and

[0014] - Reduced costs, which increases the possibility of the population accessing treatment.

[0015] However, despite recent advances in the field of zygomatic implants, drawbacks are still perceived in the current state of the art that need to be overcome. The fixation region for the dental prosthesis in an abutment assembly is, in turn, threaded onto the remaining abutment components. This region is the point of greatest dissipation of masticatory forces, resulting in damage to the abutment assembly under high-intensity stress, requiring new solutions to avoid further complications in patients with this profile.

[0016] Patients with a greater distance between the alveolar ridge and the zygomatic bone, that is, a greater distance between the point of force application (alveolar ridge) and the point of resistance (dental implant installed in the zygomatic bone), experienced greater force acting on the fixation area for the dental prosthesis, potentially increasing the risk of failure of the intermediate components. Another factor to consider is that many patients develop involuntary clenching (effort in various directions on the dental prosthesis), known as nocturnal bruxism when it occurs during sleep, and awake bruxism when it occurs during the day. This factor considerably increases the force acting on the intermediate components, increasing the risk of failure.

[0017] Therefore, a prosthetic component for implants with greater resistance to various stresses, such as chewing and bruxism, is necessary.

[0018] DESCRIPTION OF THE INVENTION

[0019] The objective of the present invention is to provide a prosthetic component for zygomatic implants with improved mechanical stability and strength.

[0020] One or more of the aforementioned objectives of the present invention(s), among others, is / are achieved by means of a prosthetic component for zygomatic implant comprising: a dental implant configured to be anchored in the zygomatic bone; an intermediate connecting element comprising a curved shape; wherein a first end of the intermediate connecting element is coupled directly or indirectly to the dental implant; a prosthetic abutment coupled to the intermediate connecting element; and wherein the prosthetic abutment is configured to receive a dental prosthesis.

[0021] BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The objectives, technical effects, and advantages of the present invention will be apparent to those skilled in the art from the following detailed description, which refers to the accompanying figures, which illustrate exemplary, but not limiting, embodiments of the claimed objects:

[0023] - Figure 1 shows an exploded perspective view of a zygomatic implant known in the prior art; - Figure 2 shows an exploded perspective view of a prosthetic component for a zygomatic implant, according to an embodiment of the present invention;

[0024] Figure 3 shows a perspective view of an intermediate connecting element of the prosthetic component for a zygomatic implant, according to an embodiment of the present invention;

[0025] Figures 4a, 4b and 4c show a front cutaway view of an intermediate connecting element of the prosthetic component for a zygomatic implant, according to embodiments of the present invention;

[0026] Figures 5a, 5b and 5c show a perspective view of an intermediate connecting element of the prosthetic component for a zygomatic implant, according to embodiments of the present invention;

[0027] Figures 6a and 6b show variations of prophetic pillars, according to embodiments of the present invention; and

[0028] Figure 7 shows a front view of an intermediate connecting element, according to an embodiment of the present invention.

[0029] DESCRIPTION OF THE INVENTION'S EMPHASIS

[0030] It should be noted that the object of the present invention, a prosthetic component for zygomatic implants, is described below according to particular, but not limiting, embodiments, since its implementation may be carried out in different forms and variations and according to the application desired by the person skilled in the art.

[0031] The use of the term “a” or “an” in this descriptive report does not indicate a limited quantity, but the existence of at least one of the listed elements / components / items. The use of the term “or” indicates any or all of the listed elements / components / items. The use of the term “comprise,” “endowed,” “provided,” or a similar term indicates that the element / component / item listed in front of said term is part of the invention, but does not exclude other unlisted elements / components / items. The use of the term “associate,” “connect,” or similar terms may refer to physical, mechanical, pneumatic, fluidic, hydraulic, electrical, electronic, or wireless connections, whether direct or indirect.

[0032] The embodiments of the present invention provide a prosthetic component for a zygomatic implant (100), especially recommended for use in patients with severe bone loss in the maxillary bone. A possible partially assembled configuration of the component (100) is illustrated in Figure 2.

[0033] The prosthetic component for zygomatic implant (100) of the present invention comprises a dental implant (not shown) that is configured to be anchored / attached to the zygomatic bone of a patient.

[0034] A dental implant comprises an elongated body of substantially conical / tapered or substantially cylindrical shape, comprising an external thread covering at least partially its external surface.

[0035] In a particularly advantageous way, any conventional implant pins of the prior art are usable in component (100) of the present invention, provided they are suitable for anchorage to the zygomatic bone. Alternatively, depending on the patient's clinical condition, the dental implant may be suitable for anchorage in any other facial bone.

[0036] The prosthetic component for zygomatic implant (100) of the present invention also has an intermediate connecting element (20).

[0037] The intermediate connecting element (20) has an elongated body with a substantially curved shape, such as approximately an “S”, a “Z”, an “L” or similar, as shown in Figures 2 to 5. The cross-section of the intermediate connecting element (20) may be, for example, substantially circular.

[0038] A first end (21) of the intermediate connecting element (20) is configured to be coupled directly or indirectly to the dental implant. The coupling and fixation of the intermediate connecting element (20) to the dental implant can be carried out by means of a screw (70), which will be detailed later.

[0039] In one embodiment, the first end (21) is tapered (truncated cone shape), in Morse taper, presenting an opening angle (õ) between 11.5° and 16°.

[0040] The component (100) also comprises a prosthetic abutment (40a, 40b), illustrated, for example, in Figures 6a and 6b. According to an embodiment of the present invention, the prosthetic abutment (40a, 40b) can be chosen from a 45° mini-conical prosthetic abutment (Figure 6a) or a micro-conical prosthetic abutment (Figure 6b), composed of three portions, wherein a first portion (41b) of the prosthetic abutment (40b) is of the CM micro-conical type, a second portion (42b) of the prosthetic abutment (40b) is a 45° micro-conical adapter, and a third portion (not illustrated) of the prosthetic abutment (40b) is of the HE mini-conical type. According to the embodiment, the dentist can choose which interface best suits the dental implant in each case, without the need for extra fixation and placement parts.

[0041] In one embodiment of the present invention, the intermediate connecting element (20) comprises a first section (20a) extending along an axis (Ai). As shown in Figure 7, the first section (20a) comprises the first end (21) of the intermediate connecting element (20).

[0042] The intermediate connecting element (20) also comprises a second section (20b) extending contiguously from the first section (20a) along an axis (A2), wherein an angle (a) between the axes (Ai) and (A2) is between 80° and 120°, characterizing the curved shape of the intermediate connecting element (20). In an alternative embodiment of the present invention, not illustrated, the second section (20b) comprises the second end (22) of the intermediate connecting element (20), forming a substantially “L” shaped body.

[0043] In another embodiment, the intermediate connecting element (20) may comprise a third section (20c) extending contiguously from the second section (20b) along an axis (A3). In this case, as illustrated in Figure 7, the third section (20c) comprises the second end (22) of the intermediate connecting element (20). Preferably, an angle ([3) between the axes (A2) and (A3) is between 30° and 80°.

[0044] In another embodiment of the present invention, an angle (y) between the axes (Ai) and (A3) is between 5 o and 45°.

[0045] It is worth noting that, in a preferred embodiment, the axes (Ai), (A2) and (A3) are coplanar or substantially coplanar with each other. In general, the angles (a), (P) and (Y) formed between these axes characterize the substantially curved shape of the intermediate connecting element (20).

[0046] The first section (20a) of the intermediate connecting element (20) comprises a through hole (26) fitted with an internal thread, configured to receive the screw (70), the screw (70) being coupled to an internal thread of the dental implant. The coupling between the dental implant and the intermediate connecting element (20) is performed directly.

[0047] In general, the screw (70) is configured to prevent radial and / or axial movement between the intermediate connecting element (20) and the dental implant.

[0048] The screw (70) may comprise an elongated cylindrical body and a screw head (71). The screw head (71), which preferably comprises a larger diameter than the diameter of the remainder of the screw (70), is configured to be supported on a stop (27) formed in the first section (20a) of the intermediate connecting element (20), thus contributing to a firm coupling between the dental implant and the intermediate connecting element (20).

[0049] Furthermore, the screw (70) can be configured to receive a square key in a corresponding recess (72) located on the screw head (71). However, a technician in the field will note that several possible configurations of the recess (72) are possible.

[0050] The second end (22) comprised in the third section (20c) of the intermediate connecting element (20) comprises a hole (30a, 30b, 30c) configured to receive the prophetic pillar (40a, 40b). In an embodiment illustrated in figure 4a, the hole (30a) of the second end (22) comprises a first portion (31a) in truncated cone shape with an opening angle between 11 o and 24°, followed by a second portion (32a) in hexagonal shape, and a third portion (33a) comprising an internal thread configured for direct or indirect threading of the prophetic pillar (40a, 40b).

[0051] In an embodiment illustrated in figure 4b, the hole (30b) of the second end (22) comprises a first portion (31b) in hexagonal shape, followed by a second portion (32b) comprising an internal thread configured for direct or indirect threading of the propitiatory pillar (40a, 40b).

[0052] In an embodiment illustrated in figure 4c, the hole (30c) of the second end (22) comprises a first portion (31 c) in hexagonal shape, wherein the first portion (31 c) extends partially out of the hole (30c) while maintaining its hexagonal shape. The hole (30c) further comprises a second portion (32c) subsequent to the first portion (31 c) comprising an internal thread configured for direct or indirect threading of the propitiatory pillar (40a, 40b).

[0053] Threading the prosthetic abutment (40a, 40b) into a hole (30a, 30b, 30c) with the configurations described above results in a stronger fixation, allowing the prosthetic component for zygomatic implant (100) to be more resistant to various stresses, such as chewing and bruxism.

[0054] The intermediate connecting element (20), according to the present invention, comprising three distinct sections (20a, 20b, 20c) is particularly advantageous as it allows the element (20) to be adapted to the most diverse scenarios faced by the dental surgeon. Each patient presents a different level of bone loss, different maxillofacial anatomies, and a single implant component (100) can be adapted to the most diverse possibilities.

[0055] Despite the description of the particular embodiments above, the present invention may be carried out in a different manner and may have modifications in its form of implementation, so that the scope of protection of the invention is limited only by the content of the appended claims, including all possible equivalent variations.

Claims

CLAIMS 1. PROSTHETIC COMPONENT FOR ZYGOMATIC IMPLANT (100), characterized by comprising: a dental implant configured to be anchored in the zygomatic bone; and an intermediate connecting element (20) comprising a curved shape, wherein a first end (21) of the intermediate connecting element (20) is configured to be coupled directly or indirectly to the dental implant, and wherein a second end (22) of the intermediate connecting element (20) is configured to be coupled directly or indirectly to a prosthetic abutment (40a, 40b).

2. COMPONENT (100), according to claim 1, characterized in that the second end (22) comprises a hole (30a) comprising a first portion (31a) in truncated conical shape with an opening angle between 11° and 24°, followed by a second portion (32a) in hexagonal shape, and a third portion (33a) comprising an internal thread configured for direct or indirect threading of the propellant pillar (40a, 40b).

3. COMPONENT (100), according to claim 1, characterized in that the second end (22) comprises a hole (30b) comprising a first portion (31b) in hexagonal shape, followed by a second portion (32b) comprising an internal thread configured for direct or indirect threading of the propellant pillar (40a, 40b).

4. COMPONENT (100), according to claim 1, characterized in that the second end (22) comprises a hole (30c) comprising a first portion (31c) in hexagonal shape, wherein the first portion (31c) extends partially outward from the hole (30c) maintaining its hexagonal shape, the hole (30c) further comprises a second portion (32c) subsequent to the first portion (31c) comprising an internal thread configured for direct or indirect threading of the propitious pillar (40a, 40b).

5. COMPONENT (100), according to any one of claims 1 to 3, characterized in that the prophetic pillar (40a, 40b) is chosen from either a 45° mini-conical type prophetic pillar or a micro-conical type prophetic pillar, composed of three portions, where a first portion (41 b) of the prosthetic abutment (40b) is of the micro conical CM type, a second portion (43b) of the prosthetic abutment (40b) is a 45° micro conical adapter, and a third portion of the prosthetic abutment (40b) is of the mini conical HE type.

6. COMPONENT (100), according to any one of claims 1 to 4, characterized in that the intermediate connecting element (20) comprises a first section (20a) extending along an axis (Ai), the first section (20a) comprising the first end (21) of the intermediate connecting element (20), and a second section (20b) extending contiguously from the first section (20a) along an axis (A2), wherein an angle (a) between the axes (Ai) and (A2) is between 80° and 120°; wherein the intermediate connecting element (20) comprises a third section (20c) extending contiguously from the second section (20b) along an axis (A3), the third section (20c) comprising the second end (22) of the intermediate connecting element (20), wherein an angle ([3) between the axes (A2) and (A3) is between 30° and 80°.

7. COMPONENT (100), according to claim 5, characterized in that the first section (20a) of the intermediate connecting element (20) comprises a through hole (26) configured to receive a screw (70), wherein the screw (70) is coupled to the internal thread of the dental implant; wherein the screw (70) is configured to prevent movement between the intermediate connecting element (20) and the dental implant.

8. COMPONENT (100), according to claim 6, characterized in that the screw (70) comprises a screw head (71), wherein the screw head (71) is configured to be supported on a stop (27) formed in the first section (20a) of the intermediate connecting element (20).

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