Dental implant for conchal crest implantation

Abstract

The present invention relates to the technical field of dental implantation, and specifically relates to a dental implant for conchal crest implantation. One end of the dental implant is provided with a working hole for abutment installation. The dental implant is suitable for placement in the conchal crest of the maxilla, and can reduce damage to soft tissues and hard tissues during implantation, improve the initial and long-term stability of the dental implant, and enhance the bonding effect of the dental implant and bone tissues.

Description

Dental implants for nasal turbinate ridge implantation

[0001] Technical Field

[0002] This invention relates to the field of oral implant technology, and more specifically, to dental implants for implanting nasal turbinate ridges.

[0003] Background Technology

[0004] According to surveys, 4.5% of elderly people aged 65-74 in my country are edentulous. The international academic community has proposed five classifications based on the available bone height and width in the anterior and posterior parts of the jawbone. Class IV is characterized by severe atrophy of the edentulous jaw, accounting for 27.1% of maxillary edentulous jaws. These patients with severe atrophy of the edentulous jaw cannot use conventional dental implant methods to restore missing teeth and their daily oral aesthetics and function.

[0005] Currently available dental implant products can only meet the needs of patients with normal jawbone conditions to undergo dental implant surgery to treat tooth loss and edentulism. When jawbone conditions are severely atrophied, we need to find other nearby anatomical conditions outside the jawbone to help place and stabilize dental implants in order to meet the needs of dentists to treat and restore patients with tooth loss and edentulism.

[0006] Based on anatomical and literature verification, the nasal turbinate crest region is a high-quality anatomical resource for dental implantation. The bone structure and morphology of the nasal turbinate crest region are relatively unique and can be used to implant specialized implants. As shown in Figure 1, the nasal turbinate crest is located deep in the maxilla, close to the nasal cavity, and has a complex physiological structure. As shown in Figures 2 and 3, the CBCT images of the patients show the nasal turbinate crest marked in yellow. The images also show various dimensions obtained from various measurements. The volume of the nasal turbinate crest (approximately 3-5.5 mm) is cortical bone, which can withstand greater occlusal forces and meet the functional requirements for immediate restoration after implantation surgery, thus enabling clinical application.

[0007] Currently, there are no implant surgeries specifically for the nasal turbinate crest in clinical practice. Existing dental implants are ill-suited to the complex physiological and anatomical structure of the nasal turbinate crest region, especially given its location deep within the nasal cavity. Existing implants are too short to reach this area (see the dimensions marked in Figures 2 and 3). Even with extended implant structures, these implants can exert excessive pressure on surrounding soft and bone tissues during placement, leading to tissue damage or implantation failure. Furthermore, due to the small volume of implantable tissue in the nasal turbinate crest, existing implants cannot utilize these physiological and anatomical characteristics for implant positioning and placement. Based on these numerous issues, a completely new dental implant system specifically designed for the nasal turbinate crest region is needed to meet the clinical needs of oral implantology.

[0008] Summary of the Invention

[0009] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a dental implant with a reasonable and simple structure that is suitable for the nasal turbinate crest region. This dental implant can reduce damage to soft and hard tissues during implantation, improve the initial and long-term stability of the dental implant, and enhance the integration effect between the dental implant and bone tissue.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A dental implant for implanting nasal turbinate crests, wherein one end of the dental implant has a mounting hole for abutment installation, and the dental implant is suitable for implantation in the nasal turbinate crest region of the maxilla.

[0012] The present invention is further configured such that: the dental implant extends along the longitudinal axis, and a root end and a crown end are respectively provided at both ends of the dental implant; the positioning hole is opened from the crown end along the longitudinal axis; and external threads are arranged on the outer surface of the dental implant to fix the dental implant in a predetermined position.

[0013] The present invention is further configured such that: the external thread has multiple threaded regions distributed on the outer surface of the dental implant, the threaded regions including threaded region one, threaded region two, threaded region three and threaded region four.

[0014] The thread in thread section one extends to the root end, and the thread in thread section four extends to the crown end.

[0015] The invention is further configured such that the diameter of the dental implant gradually decreases from the crown end to the root end, and the threaded area three includes two threaded structures with different tapers.

[0016] The present invention is further configured such that a section of unpatterned area is provided on the outer peripheral surface of the threaded area II.

[0017] The present invention is further configured such that a notch with a reduced diameter is provided on the textureless area.

[0018] The present invention is further configured such that the pitches of threaded region one, threaded region two, threaded region three and threaded region four are different, with the pitch of threaded region one being the largest, and the pitch gradually decreasing as the thread extends from threaded region one to threaded region four.

[0019] The present invention is further configured such that: a threaded groove is formed on the outer peripheral wall of the threaded area, and one end of the threaded groove is located at the root end.

[0020] The present invention is further configured such that: the height of the first threaded area is L1, which is 5-7mm; the height of the second threaded area is L2, which is 5-9mm; the height of the third threaded area is L3, which is 8-12mm; and the fourth threaded area is L4, which is 2-3mm.

[0021] The present invention is further configured such that the height of the dental implant is 20-28 mm.

[0022] Compared with the shortcomings of the prior art, the beneficial effects of the present invention are as follows:

[0023] By rationally designing a smooth transition zone and notch between the threaded and unthreaded areas of the dental implant, the compression and damage to soft tissue and bone tissue during implantation are reduced, which helps to facilitate faster postoperative recovery.

[0024] Threaded sections one and two provide better mechanical support for the initial stability of the dental implant, while threaded sections three and four ensure the stability and stress resistance of the dental implant during long-term use, reducing the risk of loosening or failure.

[0025] Attached Figure Description

[0026] Figure 1 is a model diagram of the nasal turbinate crest region;

[0027] Figure 2 shows a CT measurement of the nasal turbinate crest region of the first patient;

[0028] Figure 3 shows a CT measurement of the nasal turbinate crest region in the second patient;

[0029] Figure 4 is a schematic diagram of the dental implant of the present invention;

[0030] Figure 5 is a schematic diagram of the dental implant of the present invention after implantation;

[0031] Figure 6 is a schematic diagram of Embodiment 2 of the dental implant of the present invention.

[0032] Root end 11, crown end 12, crown 2, threaded area 1, threaded area 2, threaded area 3, threaded area 4, notch 20.

[0033] Detailed Implementation

[0034] This embodiment provides a dental implant suitable for implantation in the nasal turbinate crest region of the maxilla. The first embodiment of the present invention will be further described with reference to Figures 1 to 5.

[0035] This dental implant is designed to meet the physiological and anatomical requirements of the maxillary nasal turbinate crest region, ensuring good stability and adaptability under the relatively complex dental implantation conditions in this region.

[0036] The length of dental implants ranges from 20mm to 28mm to accommodate the different physiological and anatomical characteristics of the maxilla in different patients, especially for dental implant surgery in the nasal turbinate crest region. Implants shorter than 20mm or longer than 28mm cannot meet the requirements. Figure 2-3 shows the location of the nasal turbinate crest in the patient; the bone around the yellow circle in the figure represents the nasal turbinate crest, and the measurements are the width and thickness of the nasal turbinate crest.

[0037] The dental implant extends along the longitudinal axis and has an overall conical structure, gradually narrowing from the coronal end 12 to the root end 11 to adapt to the special bone structure of the nasal turbinate crest region, ensuring reduced pressure on surrounding bone tissue and good initial stability during implantation.

[0038] One end of the dental implant has a crown end 12 for abutment mounting, with a positioning hole along the longitudinal axis on the crown end 12. The other end is a root end 11. A stable mechanical connection is achieved through the engagement with the abutment. The abutment is used to mount the prosthesis. The outer surface of the dental implant has an external thread structure for firmly fixing the dental implant in the predetermined position.

[0039] The root end 11 is the part of the dental implant that directly contacts and embeds into the bone tissue. Because the overall structure of the dental implant is designed as a cone, it can provide a gradually increasing anchoring force when the dental implant is inserted into the bone tissue, ensuring the initial stability of the dental implant in the bone tissue.

[0040] The diameter of the root tip 11 is 1.4-2.5 mm, and the diameter of the crown 2 is 3-4.5 mm. The diameter of the root tip 11 is designed to match and fit the size of the nasal turbinate crest.

[0041] External threads are distributed on the outer surface of the dental implant, specifically divided into thread section 1, thread section 2, thread section 3, and thread section 4. The threads in thread section 1 extend to the root end 11 of the dental implant, and the threads in thread section 4 extend to the coronal end.

[0042] 12. Thread zone 2 is located between thread zone 1 and thread zone 3.

[0043] The pitch and thread shape of each threaded section are optimized according to specific clinical needs to adapt to different bone conditions.

[0044] Threaded areas 1, 2, and 3 undergo surface treatment; threaded area 4 does not undergo surface treatment, such as large-particle sandblasting and hot acid etching. This is to allow the dental implant to better integrate with the soft tissue after implantation.

[0045] The thread of threaded area 1 is V-shaped, meaning that the thread of threaded area 1 is relatively deep and has a narrow and thin thread, which can well penetrate the nasal turbinate crest. In addition, setting the pitch of threaded area 1 to be large can improve the implantation speed.

[0046] The threads in thread section 2 are fine square, while the threads in thread section 3 are coarse square. That is, the depth of the threads from thread section 2 to thread section 3 decreases from deep to shallow. The use of a thread structure with a fine front section and a wide rear section can increase the bone-bonding area. Moreover, the gradually widening threads allow more cortical bone to be retained during vertical and horizontal bone compression, minimizing marginal bone resorption.

[0047] The diameter of the dental implant gradually decreases from the coronal end 12 to the root end 11 to match the bone density and load-bearing requirements of different areas. Specifically, the external threaded area of ​​the dental implant includes four main areas: threaded area 1, threaded area 2, threaded area 3, and threaded area 4. These four threaded areas contain structures with different taper variations according to the anatomical characteristics of their respective areas, so as to provide wedge forces of different depths during implantation.

[0048] By distributing different threaded zones and designing their corresponding tapers, dental implants can quickly achieve initial stability during implantation and gradually adapt to changes in bone tissue after surgery, thereby achieving long-term osseointegration.

[0049] The tapered and threaded depth of threaded area 1 are large, which can provide a larger contact area and wedge force, effectively embedding into the bone cortex and forming a strong mechanical lock. This design can resist the large torque borne by the dental implant in the early stage, and the tapered design reduces the stress concentration of the bone, ensuring stability in the early stage of implantation. Threaded area 1 has a threaded groove on its outer peripheral wall, and one end of the threaded groove is placed on the root end 11.

[0050] The moderate taper of thread section 2 effectively balances the fixation force and stress distribution, preventing excessive stress on the bone and potential damage. This moderate taper allows the dental implant to gradually extend into the bone, resulting in a more uniform stress distribution.

[0051] The smaller taper design of thread zone 3 provides a gentle spreading force, allowing the threads to smoothly contact the bone rather than forcibly compressing the bone tissue. The further reduced pitch ensures a higher contact density, thereby effectively dispersing stress and preventing bone resorption or bone degeneration in the bone region.

[0052] The threaded area 4 is located near the soft tissue. During implantation, part of this area connects to the bone region through its external threads, while the other part integrates with the soft tissue. To adapt to these two physiological and anatomical characteristics, threads are pre-embedded during machining.

[0053] The fourth 4th ridge is not surface treated, which allows for better semi-bridge connection of the soft tissue after implantation, avoiding irritation or damage to the soft tissue and bone surface.

[0054] Furthermore, the taper-free design and small pitch of threaded section 4 ensure a smooth transition of the dental implant into the bone surface and soft tissue, meaning that it will not exert excessive pressure on the bone surface or soft tissue during implantation, thereby reducing the risk of inflammation or infection.

[0055] From a physiological and anatomical perspective, the tapered variations in thread sections 1 through 4 are designed to accommodate bone structures of varying densities. Thread section 1, with its maximum tapered design, provides strong retention in dense bone; the gradually decreasing tapered tapers in thread sections 2 and 3 optimize stress distribution; and thread section 4 protects soft tissue from excessive stimulation. This combination of tapered variations and gradually decreasing pitch not only meets the mechanical requirements of dental implants in different physiological and anatomical regions but also ensures their physiological adaptability and long-term stability in each region.

[0056] During the implantation process, the marking points are first made. Then, a drill bit is used to penetrate the nasal floor until the tip of the drill bit is visible at the nasal floor. A larger diameter drill bit is then used to enlarge and adjust the cavity prepared within the bone. Next, the tip of a positioning drill bit is used to locate and anchor the nasal turbinate crest. The positioning drill bit is then slightly fixed against the nasal cavity sidewall and pulled up and down along the nasal cavity sidewall to create a concave groove. The tip of the positioning drill bit is then pressed against the nasal turbinate crest, and the drill bit is inserted into the nasal turbinate crest, completing the preparation of the cavity for transnasal implantation. Finally, the dental implant is inserted through the cavity into the nasal turbinate crest. Torque is used to rotate the dental implant to lock and fix it to the nasal turbinate crest. Therefore, two symmetrical threaded grooves are formed on the outer peripheral surface of the threaded area 1, extending to the root end 11, forming a boomerang-shaped cutting edge on the root end 11, which facilitates insertion into the nasal turbinate crest.

[0057] Furthermore, during the implantation process, the threaded groove can increase its torque. When implanted normally, the implant rotates forward, and the threaded groove compresses the bone along the thread. When the implantation torque is too high, the implant needs to be reversed. The cutting edge of the threaded groove directly embeds into and cuts the bone, relieving the pressure of the implant on the bone. Moreover, when the implant is reversed, the cutting edge of the threaded groove cuts the bone during its withdrawal process, expanding the cavity, which can allow the implant to be re-anchored.

[0058] On the outer peripheral surface of the threaded area 2, there is a smooth, unthreaded area. This unthreaded area is designed to eliminate irritation to the nasal mucosa caused by the threaded structure, as this area will be exposed under the nasal mucosa. Furthermore, a notch 20 is carved into the unthreaded area to further reduce radial pressure, forming a guiding structure to reduce tissue compression during implantation. The inner surface of the notch 20 is arc-shaped, allowing for a smooth transition and enabling bone tissue to better adapt to the shape of the inner surface of the unthreaded area during implantation. After the dental implant is implanted, the unthreaded area faces the nasal mucosa, preventing soft tissue damage.

[0059] The threaded ends of threaded area 1 and threaded area 3 are connected to the upper and lower ends of recess 20. A portion of the threaded ends is fused with the inner surface of recess 20. In order to avoid the formation of a cutting edge, the groove edges of recess 20 are chamfered with raised arc-shaped end faces, thereby making recess 20 form a continuous and safe transition area, avoiding contact between the soft tissue of the nose after implantation and ensuring the stability of the implant.

[0060] In terms of height distribution, the height L1 of threaded area 1 is 5-7mm. Threaded area 1 is completely implanted within the nasal turbinate crest, that is, it is fixedly connected to the nasal turbinate crest.

[0061] The height L2 of threaded section 2 is 5-10mm. This height ensures that the length of the notch 20 is also the same. After the dental implant is fully inserted, the notch 20 is designed to prevent it from touching the inner wall of the nasal cavity. This height distribution allows the dental implant to distribute stress evenly at different locations, thereby reducing local stress concentration.

[0062] The height L3 of threaded section 3 is 8-12mm. Threaded section 3 is responsible for bearing the occlusal force and other mechanical loads after the dental implant is implanted for a long time. Threaded section 3 can increase the contact area between the dental implant and the bone tissue, thereby distributing the occlusal force more evenly, reducing stress concentration in local areas of the dental implant, and thus reducing the risk of dental implant loosening or failure.

[0063] The threaded section 3.3 better distributes the long-term load, ensuring sufficient retention for the dental implant during initial placement. This height-to-weight ratio design achieves a good balance between initial placement stability and long-term osseointegration, especially in anatomically complex areas such as the nasal turbinate crest.

[0064] The height L4 of the threaded section 4 is 2-3mm, which ensures a smooth transition of the dental implant into the bone surface and soft tissue.

[0065] Example 2, as shown in Figure 6. The threaded area 2 of the implant has a smooth end face and is called the functional area without threads. A notch is formed on the outer peripheral wall of this functional area. The function of this embodiment can also achieve the physical requirements of Example 1.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A dental implant for implanting a nasal turbinate crest, wherein one end of the dental implant has a mounting hole for abutment installation, characterized in that, The dental implant is suitable for implantation in the nasal turbinate crest region of the maxilla.

2. The dental implant for implanting the nasal turbinate crest according to claim 1, characterized in that, The dental implant extends along a longitudinal axis and has a root end and a crown end at both ends. A positioning hole is opened from the crown end along the longitudinal axis, and external threads are arranged on the outer surface of the dental implant to fix the dental implant in a predetermined position.

3. The dental implant for implanting the nasal turbinate crest according to claim 2, characterized in that, The external thread has multiple threaded regions distributed on the outer surface of the dental implant. The threaded regions include threaded region one, threaded region two, threaded region three, and threaded region four. The thread in threaded region one extends to the root end, and the thread in threaded region four extends to the crown end.

4. The dental implant for implanting the nasal turbinate crest according to claim 3, characterized in that, The diameter of the dental implant gradually decreases from the crown end to the root end in order to form a cone shape.

5. The dental implant for implanting the nasal turbinate crest according to claim 4, characterized in that, A section of unpatterned area is provided on the outer circumferential surface of the second threaded area.

6. The dental implant for implanting the nasal turbinate crest according to claim 5, characterized in that, The textureless area has a notch that reduces its diameter.

7. The dental implant for implanting the nasal turbinate crest according to claim 3, characterized in that, The pitches of threaded sections one, two, three, and four are all different, with threaded section one having the largest pitch. As the thread extends from threaded section one to threaded section four, the pitch gradually decreases. Threaded sections one, two, three, and four are set with different tapers according to physiological and anatomical conditions and usage methods, and the tapers extend from the root end to the coronal end.

8. The dental implant for implanting the nasal turbinate crest according to claim 7, characterized in that, A threaded groove is formed on the outer peripheral wall of the threaded area, and one end of the threaded groove is located at the root end.

9. The dental implant for implanting the nasal turbinate crest according to claim 8, characterized in that, The height of threaded section one is L1, which is 5-7mm; the height of threaded section two is L2, which is 5-10mm; the height of threaded section three is L3, which is 8-12mm; and the height of threaded section four is L4, which is 2-3mm.

10. The dental implant for implanting a nasal turbinate crest according to any one of claims 1-9, characterized in that, The height of the dental implant is 20-28 mm.

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