Transnasal dental implant

Abstract

The present invention patent relates to a transnasal dental implant for treating upper jaws with missing teeth and severe bone atrophy, facilitating the execution of the Vanderlim technique and offering an alternative to the use of four zygomatic implants, or "quad zygoma". The implant has been developed for anchoring in any nasal turbinate anatomy, and offers the advantages of reducing surgical complexity, attending to a greater number of patients, making it possible to immediately install a complete fixed prosthesis, and improving long-term predictability and stability. The transnasal dental implant (1) has a head (11) with an upper screw thread (111) and an indicator (116); a body (12) that has a smooth section (121) and a screw thread (122); and a tip (13) with a helical slot (131).

Description

[0001] TRANSNASAL DENTAL IMPLANT

[0002] Field of invention

[0003] This invention patent relates to a transnasal dental implant for the Vanderlim technique, applied in the field of dental implants, more specifically upper full-arch implants. The transnasal dental implant, in conjunction with the Vanderlim technique, is intended to be a simpler, less traumatic, and more predictable treatment option, avoiding the use of four zygomatic implants, "quad zygoma," to treat cases of severely atrophic maxillae, while maintaining the possibility of installing immediate total or partial fixed prostheses. The transnasal implant has the advantages of reducing the complexity of surgeries, better postoperative recovery, less risk of surgical complications, and allows for the treatment of a greater number of patients.

[0004] Fundamentals of the invention

[0005] Total tooth loss, also known as total edentulousness, has several consequences that affect the physical, psychological, and social health of the affected individual. Missing teeth compromise chewing, leading to inadequate food intake and, consequently, nutritional problems. Patients wearing removable complete dentures experience discomfort and instability, impacting their self-esteem and increasing the risk of social isolation, anxiety, and depression. Dental implants are an alternative that has become essential for the rehabilitation of these patients, restoring function, aesthetics, and quality of life.

[0006] In individuals without teeth, alveolar bone resorption occurs, resulting in progressive bone loss. Treatment for these cases, prior to the 2000s, involved several complex and lengthy surgeries, including bone grafts, which could take more than a year to complete. With technical advancements, inclined implants and the "All on 4" concept, conceived by Professor Paulo Maló, emerged. This approach uses only four implants per arch—two anterior and two inclined—optimizing bone anchorage, reducing costs and treatment time. There are also variations such as "All on 4 Standard" for moderate atrophy, "All on 4 Hybrid" for advanced atrophy, and "AU on 4 Zygoma" for severe atrophy, which uses four implants anchored in the zygomatic bone, avoiding the need for grafts.

[0007] Zygomatic implants are a specialized type of dental implant specifically designed for patients with advanced or severe bone atrophy in the maxilla, a condition in which conventional dental implants cannot be installed. Their main purpose is to provide a solution for patients who have lost several upper teeth or have severe bone resorption in the jaw region. These implants are longer than standard implants, allowing anchorage in the zygomatic bones, which are located laterally in the face and form the cheekbone, rather than the alveolar bone where the teeth are inserted.

[0008] However, the use of zygomatic implants presents significant challenges, especially in cases of severe bone atrophy. The bony anatomy of the zygomatic region is complex and involves proximity to vital structures such as the orbit and maxillary sinuses. This increases the risk of complications, making the procedure demanding high precision and surgical experience, a skill only available to a few specialists. Furthermore, it is more invasive, which can result in greater postoperative discomfort, and is expensive due to its complexity and the materials used. These challenges make the QuadZygoma procedure indicated only in extreme cases where other options are not viable.

[0009] To simplify this surgical procedure, the inventor developed an alternative technique called the "Transnasal Implant Technique - Vanderlim" (Copyright registration number 816383, Book 1587, Page 471). Transnasal Implants are anchored apically in the frontal process of the maxilla and nasal concha, crossing the nasal cavity, tangential to the distal wall, and anchored at their base in the residual alveolar bone of the anterior maxilla. This technique was developed to increase bone availability in the anterior maxilla, enabling the placement of a conventional implant in this region, accompanied by a posterior zygomatic implant (Source: Clinical Solutions Book for Total Rehabilitation on Implants without Bone Grafts, 2019 / Chapter 13). Transnasal Implants (Vanderlim Technique) then began to offer a simpler alternative to the second Zygomatic Implant.

[0010] With the aim of offering an implant specially designed to be used in conjunction with the Vanderlim Technique, a new transnasal dental implant was developed.

[0011] The new Transnasal Implant, optimized for the Vanderlim Technique, has an anatomical design specifically developed to better adapt to the nasal cavity, providing secure fixation in severely atrophic maxillae without invading adjacent structures. The implant also simplifies the surgical procedure compared to the Quad Zygoma technique, making it accessible to a greater number of surgeons, with a shorter learning curve.

[0012] Furthermore, the geometry of the nasal anchorage ensures excellent predictability and long-term stability, thanks to the high bone density of the nasopalatine region, optimizing clinical success in cases of atrophic maxillae. Another benefit is the reduction of risks associated with zygomatic techniques, such as orbital perforations and inflammation, in addition to reducing the risk of trauma to the maxillary sinuses, as it eliminates the need for four zygomatic implants. The implant's versatile design allows its application in a variety of clinical settings, from large hospitals to small clinics, which broadens the indications for the Vanderlim Technique and facilitates its adoption in different settings.

[0013] These advantages demonstrate how the new Transnasal Implant can transform the treatment of atrophic jaws, offering more effective and predictable solutions.

[0014] In order to better define the state of the art, searches were carried out in national and international patent banks, finding the following relevant prior art.

[0015] Brazilian patent BR202019001133 entitled “Zygomatic implant with partially interrupted threaded portion” discloses an implant consisting of an elongated, cylindrical body; a conical apical region covered by threads and provided with at least three helical chambers and a hemispherical end; and a cervical region defined by a smooth cervical surface, the elongated, cylindrical body comprising at least one longitudinal strip with a substantially smooth surface, said smooth longitudinal strip being located in the cervical portion of the zygomatic implant; the connection between the threads and the smooth longitudinal strip is made by a transition curvature, and the smooth longitudinal strip is aligned with one of the flat faces of the internal section with a hexagonal cross-section of the prosthetic interface of the implant.

[0016] Chinese patent CN214549673 titled "Zygomatic Implant and Oral Implant" discloses a zygomatic implant comprising an implant head, an implant transition portion, and an implant neck that are sequentially connected, the implant head is a conical body and comprises a guide portion and an installation portion that are connected, the surface of the guide portion is a smooth surface, and the end, remote from the installation part, of the guide portion is a spherical surface; the transition portion comprises a smooth surface portion of the maxillary sinus and a threaded portion of alveolar bone that are connected, the mounting portion is connected with the smooth surface portion of the maxillary sinus, and the threaded portion of alveolar bone is connected to the implant neck; a plurality of threaded sections are arranged sequentially on the periphery of the mounting part, and a chip groove is formed in the mounting part.The smooth surface portion of the maxillary sinus is located on the inner or outer side of the bony maxillary sinus and is a smooth, unmachined surface. This protects the maxillary sinus mucosa and prevents biological complications. The alveolar bone wire portion is located in the alveolar bone and blends well with the alveolar bone.

[0017] Brazilian patent BRPI0604657 entitled “Cortical screw for zygomatic fixation system” reveals screws of appropriate sizes, longer than conventional ones, with prior surface treatment, together with a monoblock angular adjustment element, whose function is to provide a correct angle for fixing the prosthetic elements or prosthetic platform in the oral cavity.

[0018] Chinese patent CN218484682 titled "Cheekbone Implant and Implant Assembly" discloses a cheekbone implant comprising an implant head portion, an implant transition portion, and an implant neck portion that are connected in sequence. The implant head portion comprises a conical portion and a cylindrical portion, and the conical portion comprises a first threaded area; the cylindrical portion comprises a second threaded area; a concave area is arranged on the outer surface of the implant transition portion; the implant neck portion comprises a third threaded area and a smooth platform area, and the third threaded area is connected to the implant transition portion. The outer surface of the implant transition portion is provided with a concave area, and the implant transition portion is arranged in the cheekbone portion, so that the face cannot be too high by matching the concave area.

[0019] The implants disclosed by patents BR202019001133, CN214549673U, BRPI0604657B8, and CN218484682U consist of different models of zygomatic implants and are indicated for zygomatic implant techniques. They are not indicated for the "Transnasal Implant Technique - Vanderlim Technique," and for these reasons, the number of patients that can be treated is limited. Zygomatic implants, as revealed by the aforementioned patents, when used as transnasal implants, are not adequately sized and have a bulkier tip designed to be anchored to the zygomatic bone. The threaded side of the implants can damage the nasal mucosa, preventing proper healing and increasing the risk of inflammation. These implants are longer in length to reach the zygomatic bone, therefore, they are not indicated for use as transnasal implants.

[0020] Furthermore, for the installation of dental implants using the "Transnasal Implant Technique - Vanderlim Technique" (copyright registration number 816383, book 1587, page 471), conventional long dental implants measuring 20 mm to 25 mm are used, the same implants used in the All on 4 Standard technique (NobelBiocare™). This type of implant has the same design as the state-of-the-art implants, with a cylindrical or conical body, full-length spirals, and a head where the abutments for screwing the prostheses are installed. The difficulty with using conventional long implants for the "Transnasal Technique - Vanderlim Technique" is that they are only applicable in cases where the patient has large nasal conchae. Due to their larger size, they can cause fractures in the more delicate nasal bones, limiting the number of patients who can be treated.It can be seen, therefore, that with the implants presented in the state of the art, the possibility of performing implants using the “Transnasal Technique - Vanderlim Technique” is largely reduced, restricting implantologists to QuadZygoma surgeries, which are extremely complex.

[0021] The "TRANSNASAL DENTAL IMPLANT," the subject of this patent, was developed to overcome the disadvantages of conventional long implants. The implant's anatomical design offers greater compatibility with the residual bone anatomy of the maxilla, the bone of the lateral wall of the nasal cavity, and the canine abutment, and better adapts to the varying bone volumes of the nasal concha, which can be large, medium, or small. The thinner tip allows anchoring in any of the three different nasal concha volumes, preventing fractures and achieving high torque for immediate loading. The implant body has spirals only at 180° and is smooth at the other 180°, where the spirals help obtain torque and, when properly seated, will face the bone of the lateral wall of the maxilla. The smooth, unspiraled portion better accommodates the soft tissue, eliminating the possibility of irritation or inflammation.Thus, the invention was developed to obtain high torque and allow the patient to be rehabilitated with immediate loading in all cases and, consequently, offer a simpler alternative to surgeries that require the use of the QuadZygoma technique.

[0022] The prior art presents the following technical problems and shortcomings, which were resolved by the present invention, shown below: a. Currently used dental implants were designed to be placed at the same level as the bone crest, which can lead to problems such as inflammation of the soft tissues surrounding the implant, which promotes bacterial growth, such as mucositis and peri-implantitis. There is a greater risk of bone resorption around the implant, which can easily progress to loss of support, residual crest, and oroantral communication. This problem was resolved by the present patent by increasing the head length by 1.5 mm, which was achieved by the supraosseous implant, thus avoiding marginal bone loss and soft tissue inflammation. b.Currently used dental implants have spirals throughout the body, with no purpose when in contact with soft tissue (nasal mucosa) in NASA anatomical classifications 0, 1, 2, 3, or the vestibular flap in NASA anatomical classification 4. This problem was solved by this patent through spirals positioned at only 180° from the body, maintaining contact with the bone and increasing torque for immediate loading without being exposed, preventing irritation. c. Currently used dental implants have a very large apex, as they were not designed for anchoring in nasal turbinates, which have a thin and delicate bone structure. Only 23.2% of patients have a large nasal turbinate (greater than 4.8 mm), and only in these cases is it possible to install implants with large apices. Fifty-five percent of patients have a medium nasal turbinate (between 3.8 mm and 4.8 mm).5mm to 4.8mm), critical cases for placement of currently used implants, and 21.8% of cases have small nasal concha (less than 3.5mm), insufficient for placement of currently used implants. This problem was solved with the development of an implant with a thinner apex, enabling use in all nasal concha volumes. This apex requires minimal wear of the nasal concha during drilling to create the surgical bed for implant placement, reducing the risk of turbinate fracture during drilling and implant placement, which could compromise primary stability. Minor wear of the nasal concha also prevents resorption of this bone, which could compromise long-term implant stability. d.The implants currently available on the market complicate the procedure and increase surgical complexity, as they were developed for use in the "aZZ on 4" (Nobel Biocare™) techniques, where the bone is more voluminous. This patent solves this problem by developing an ideal Transnasal Implant, with a simpler operation, allowing standard surgeons to perform the surgery and treat more cases. It offers high initial stability and helps preserve bone integrity, preventing fractures during implant placement and preventing resorption of the thin bones of the nasal conchae.

[0023] For over a decade, Dr. Vanderlim Branco Camargo worked in research and development of the Transnasal Implants technique, entitled “Vanderlim Technique”, and has published several nationally and internationally, including mentions in the books “Soluções Clínicas Vol 1, Gram, 2019 and 2022”; "Remote Anchorage Solutions for Severe Maxillary Atrophy, 2023”; and "Advanced Zygomatic Implants, Dr. Carlos Aparicio, 2023”, gaining worldwide recognition as the creator of the technique and his name.

[0024] Throughout his career, the inventor observed several disadvantages with the "quad Agoma" procedure for zygomatic implants, which is often used in cases of severe maxillary bone atrophy where bone grafts are not recommended. This practice, in addition to being highly complex, was also limited by several factors, such as insufficient bone volume, low bone density, inadequate initial implant stability, positioning of the infraorbital foramen in the path of the second zygomatic implant, or concavity in the anterior maxillary wall.

[0025] To overcome these disadvantages and provide more gentle and effective care to his own patients, the inventor developed an innovative approach called the Vanderlim Technique. This technique involved inserting implants through the nasal cavity and anchoring them in the basal bone of the maxilla, specifically in the frontal region, known as zone 1. This provides greater bone availability in the anterior region of the maxilla, allowing the placement of conventional dental implants alongside posterior zygomatic implants.

[0026] This approach has become a notable advancement in dentistry, enabling the restoration of oral function and aesthetics in patients with complete loss of teeth in the upper jaw and severe bone loss. It has made it possible to treat these patients without the need for extensive bone grafting procedures. This has resulted in a substantial improvement in their quality of life.

[0027] Currently, for the installation of a Transnasal Implant using the Vanderlim Technique, long dental implants (20 mm to 25 mm) that are already on the market are used. These implants are commonly used for other techniques and are designed with larger apices for anchorage in larger bones. Consequently, several limitations have been introduced to ensure surgical success and patient safety, including minimum bone dimensions: a minimum height of 3 mm of bone between the maxillary ridge and the nasal cavity, and at least 3 mm of implant anchorage in the nasal concha and frontonasal process of the maxilla. During surgery, implant installation requires an insertion torque greater than 35 N.cm to allow placement of the total fixed prosthesis with immediate loading. (Source: Transnasal Implants as an Anterior Anchorage Pillar in Atrophic Complete Maxillas and Anatomical Classification, Vanderlim Branco Camargo et al, 2020).

[0028] Seeking to reduce risks and increase the number of patients in whom the Vanderlim Transnasal Implant Technique can be applied, the inventor compiled CT scan data from 60 patients who had been screened for Vanderlim Technique surgery over the past seven years. The patients were then divided into three groups based on the anatomical dimensions of their nasal turbinates:

[0029] I. Large nasal concha, measuring more than 4.8 mm. This corresponds to 23.3% of patients. In these cases, the Vanderlim technique can be performed with existing implants;

[0030] II. Average nasal concha, size between 3.5 mm and 4.8 mm. This corresponds to 55% of patients. Critical situation: the use of commercially available implants for the Vanderlim technique often causes concha fracture during milling or implant placement; and

[0031] III. Small nasal concha, smaller than 3.5 mm. This corresponds to 21.7% of patients. Commercially available implants cannot be used for the Vanderlim technique.

[0032] The study concludes that of the 60 patients screened for surgery using this technique, only 14 had sufficient turbinate volume for safe use of commercially available implants. The remaining 46 patients are at high risk for fracture of the turbinate bone during drilling or implant placement (currently available), resulting in a lack of torque in the implant and the impossibility of immediate loading and / or resorption of this thin bone in the long term, as well as a lack of anchorage, leading to implant loss.

[0033] Furthermore, it was observed that, as the implant head is anchored to the residual bone (due to bone loss) of the patients' maxilla, implants with a cylindrical upper shape are very bulky and are not recommended.

[0034] The inventor noted that tissue-level implants offer significant advantages over bone-level implants, particularly in preserving bone and gum health, due to their design and placement. First, they help preserve the bone crest because they are positioned above the bone, preventing bone resorption caused by micro-movements and minimizing stress in the area. Furthermore, their prosthetic connection occurs above the gum line, which reduces the risk of marginal bone loss and ensures greater bone stability over time.

[0035] Another benefit is soft tissue stability, thanks to the polished transmucosal neck, which promotes biological sealing and reduces gingival inflammation, as there is less plaque accumulation. Maintenance is also facilitated, as access to the implant neck is easier, reducing the risk of peri-implantitis. The prosthetic connection outside the bone area also reduces the chances of micromovement, which contributes to the preservation of the bone crest and increases implant longevity.

[0036] Finally, tissue-level implants are more predictable in patients with thin gingival biotypes, offering better soft tissue support and preserving aesthetics over time. In short, these implants ensure greater bone preservation, gingival stability, and ease of maintenance, making them ideal for cases requiring long-term peri-implant health.

[0037] To ensure proper positioning of the implant body and head, as well as to improve the development of transnasal implants, the NASA (Nasal Anatomic Systematic Approach) classification was developed. This classification identifies the region of the residual alveolar ridge with the greatest bone volume to stabilize the implant, and is also used to plan the locking of the implant body coils into the internal cortex of the nasal cavity.

[0038] Based on these parameters and aiming to develop the ideal Transnasal Implant for the correct execution of the Vanderlim technique, the inventor developed a new implant model with dimensions appropriate for treating all types of nasal concha bone anatomy (small, medium, and large). It allows the use of narrower drills, avoiding bone fracture; and achieves torque greater than 35 N.cm, allowing immediate prosthesis installation. This new implant has a partially smooth side that prevents damage to the nasal mucosa and facilitates healing, maintaining adequate support through the coils in contact with the bony wall of the nasal cavity. In the NASA anatomical classifications 0, 1, 2, and 3, the coils face the vestibular region, lateral wall of the maxilla, and canine pillar, and in the NASA anatomical classification 4, they face the palatal region.On the other hand, the smooth part of the implant body will be in contact with the nasal mucosa in the NASA anatomical classifications 0, 1, 2, 3 and will be in contact with the soft tissue of the vestibular flap in the NASA classification 4. In this way, the smooth part will always be facing the soft tissue to prevent irritation.

[0039] The tip is thinner, reducing the size of the initial drill and, consequently, minimizing bone damage. The implant's conical head minimizes the chance of fracturing the maxillary crest, as it accommodates various nasal anatomies more easily. With these dimensions, the surgery becomes simpler and less traumatic, and can be performed by all implantologists, with greater tolerance for potential unforeseen events, expanding the treatment potential using the technique from 13% to effectively 100% of cases.

[0040] Brief description of the drawings

[0041] For a better understanding of this patent, the following figures are attached:

[0042] Figure 1 illustrates the top view of the Transnasal dental implant (1), with emphasis on the smooth section (121);

[0043] Figure 2 illustrates the front view of the Transnasal dental implant (1) with emphasis on the head (11), body (12) and tip (13);

[0044] Figure 3 illustrates the perspective view of the Transnasal dental implant (1);

[0045] Figure 4 illustrates the side view of the Transnasal dental implant (1), with emphasis on the index finger (116);

[0046] Figure 5 illustrates the inferior perspective view of the Transnasal dental implant (1), illustrating the helical cutout (131);

[0047] Figure 6 illustrates the side view of the Transnasal dental implant (1), with emphasis on the tip (13) with helical cutouts (131);

[0048] Figure 7 illustrates the front view of the Transnasal dental implant (1); indicating the cross sections (Dl), (D2), (D3), (D4) and (D5);

[0049] Figure 8 illustrates the cross section with diameter 1 (dl);

[0050] Figure 9 illustrates the cross section with diameter 2 (d2);

[0051] Figure 10 illustrates the cross section with diameter 3 (d3);

[0052] Figure 11 illustrates the cross section with diameter 4 (d4);

[0053] Figure 12 illustrates the cross-section with final diameter (d5); and Figure 13 demonstrates the NASA (Nasal Anatomic Systematic Approach) classification with the state-of-the-art implant (IET) and the state-of-the-art zygomatic implant (IETZ).

[0054] Description of the invention

[0055] According to figure 2, the Transnasal dental implant (1), preferably in pure titanium grade 4, or alternatively in titanium alloys with zirconium, or alternatively biocompatible polymers, is equipped with a head (11), equipped with a body (12) and equipped with a tip (13).

[0056] According to figures 3 and 4, the head (11), with a truncated cone shape, has a smooth side

[0057] (112) in its upper part with a length of 1mm to 1.8mm, preferably 1.5mm, with its edges in contact with the face (113) chamfered; it has an upper thread (111) with a length of 3.5mm to 4.3mm, preferably 4.0mm, which runs along the side of the conical body of the head (11); it has a flat face (113); it has an intermediate hole (114); and it has an indicator (116) on the face

[0058] (113) centered on the smooth section (121).

[0059] According to figures 1 and 5, the body (12) has a cylindrical shape with a length of 9mm to 19mm, has a smooth section (121) that runs half, or 180°, of the body (12); and has a thread (122), continuing the upper thread (111), which runs half, or 180°, of the body (12) that gradually changes to a triangular thread as it approaches the tip (13).

[0060] According to figures 1, 2 and 6, the tip (13) is 5mm to 8mm, preferably 6mm, in length; and has a helical cutout (131) of 4mm to 6.5mm, preferably 6mm, in length.

[0061] Examples of embodiments of the invention

[0062] In the head (11) of the Transnasal dental implant (1), the hole for the abutment (114) can have different arrangements to allow the fitting of different abutments such as Morse taper, external hexagonal, internal hexagonal, etc. Likewise, the key fitting can be changed to accommodate different tools for insertion.

[0063] According to figures 7 to 12, the head (11) has a cross-section with an initial diameter (dl) of 3.7mm to 4.3mm, preferably 3.75mm, which gradually reduces to the beginning of the body (12) to a diameter (d2) of 3.3mm to 3.7mm, preferably 3.5mm; the body (12) is cylindrical and has a constant diameter (d2) to (d3) of 3.3mm to 3.7mm, preferably 3.5mm; the tip (13) has a diameter (d3) of 3.3mm to 3.7mm, preferably 3.5mm; it has a diameter (d4) of 2mm to 3mm, preferably 2.5mm at its midpoint; and it has a final diameter (d5) of 0.8mm to 1.8mm, preferably 1.5mm at its apex.

[0064] The geometry of the Transnasal dental implant (1) has different functions. The upper thread (111) of the head (11) has a square thread apex to maintain high torque in the residual maxillary bone. The indicator (116) indicates the position of the smooth part, offering a visual marker to the implantologist to facilitate the positioning of the thread (122). The smooth side (112) is responsible for leaving the Transnasal dental implant (1) at tissue level, causing the portion closest to the gum to be above the bone, minimizing direct interaction between the bone and the implant in the bone crest. The smooth section (121) of the body (12) avoids damaging the soft tissues (nasal mucosa in the NASA anatomical classifications 0, 1, 2, 3 and vestibular flap in the NASA classification 4) and reduces the possibility of inflammation.The thread (122) of the body (12) must always be in contact with the bone of the vestibular wall of the nasal cavity to increase insertion torque, increase primary stability, immediate loading, and has a square thread apex that gradually becomes triangular as it approaches the tip (13), allowing cutting and simultaneously improving the support and integration of the Transnasal dental implant (1). The tip (13) has a length of 5mm to 8mm to anchor itself in the nasal bone of different patients, with an apex diameter of 0.8mm to 0.8mm to avoid damage and fractures to the bone, allow anchorage in all nasal concha sizes and maintain high stability. The thread of the tip (13) becomes completely triangular upon reaching its apex to facilitate cutting. The cutout (131) of the tip aids in the removal of residual material from the drilling process and ensures a more robust fixation.

[0065] According to figure 4, the indicator (116) can have different shapes, adapting to the different key fitting formats, as long as its function of serving as a visual marker to distinguish the position of the smooth section (121) from the thread (122) is maintained.

[0066] According to figures 1, 2 and 3, the thread that runs through the entire Transnasal dental implant (1), including threads (111) and (122), starts at the apex of the tip (13) with a triangular profile and gradually changes to a square profile at the end of the upper thread (111).

[0067] Alternatively, to further improve initial stability, threads (111) and (122) can be double or progressive to increase initial fixation and promote better primary locking in the bone, especially in situations of low bone density.

[0068] Alternatively, the Transnasal dental implant (1) may use a linear cutout (131) at its tip (13).

Claims

CLAIMS 1. TRANSNASAL DENTAL IMPLANT, preferably in pure titanium grade 4, or alternatively in titanium alloys with zirconium, or alternatively biocompatible polymers, with a face (113) and hole for an intermediary (114) characterized by being provided with a head (11), provided with a body (12) and provided with a tip (13), where: the head (11), of frustoconical shape, has a smooth side (112) in its upper part with a length of 1mm to 1.8mm, preferably 1.5mm, with its edges in contact with the face (113) chamfered; it has an upper thread (111) with a length of 3.5mm to 4.3mm, preferably 4mm, which runs along the side of the conical body of the head (11); and has an indicator (116) on the face (113) centered on the smooth section (121); the body (12), cylindrical in shape with a length of 9mm to 19mm, has a smooth section (121) that runs half, or 180°, of the body (12);and has a thread (122), continuing the upper thread (111), which runs half, or 180°, of the body (12); the tip (13) is 5 mm to 8 mm, preferably 6 mm in length and has a helical cutout (131) of 4 mm to 6.5 mm, preferably 6 mm, in length.; 2. TRANSNASAL DENTAL IMPLANT, according to claim 1, characterized in that the head (11) has a cross-section with an initial diameter 1 (dl) of 3.7mm to 4.3mm, preferably 3.75mm, which gradually reduces to the beginning of the body (12) to a diameter (d2) of 3.3mm to 3.7mm, preferably 3.5mm; the body (12) is cylindrical and has a constant diameter (d2) to (d3) of 3.3mm to 3.7mm, preferably 3.5mm; the tip (13) has a diameter (d3) of 3.3mm to 3.7mm, preferably 3.5mm; it has a diameter 4 (d4) of 2mm to 3mm, preferably 2.5mm at its midpoint; and has a final diameter (d5) of 0.8 mm to 1.8 mm, preferably 1.5 mm at its apex.

3. TRANSNASAL DENTAL IMPLANT, according to claim 1, characterized in that the indicator (116) can have different shapes, adapting to the different key fitting formats (115), as long as its function of serving as a visual marker to distinguish the position of the smooth section (121) from the thread (122) is maintained.

4. TRANSNASAL DENTAL IMPLANT, according to claim 1, characterized by the thread that runs throughout the Transnasal dental implant (1), including the threads (111) and (122), starting at the tip apex (13) with triangular profile and gradually changing to square profile at the end of the upper thread (111).

5. TRANSNASAL DENTAL IMPLANT, according to claim 1, characterized in that, alternatively, the thread that runs through the entire Transnasal dental implant (1), including the threads (111) and (122), are double or progressive.

6. TRANSNASAL DENTAL IMPLANT, according to claim 1, characterized by alternatively making use of a linear cutout (131) at its tip (13).

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