Novel implant surface treatment method and device

Abstract

The invention provides a novel implant surface treatment method and device, and the method comprises the following steps: carrying out sand blasting treatment on an implant by adopting TA4G medical titanium sand, and controlling the sand blasting parameters to be that the air pressure is 0.18-0.25 Mpa, the distance between a spray gun nozzle and the implant is 3-8 mm, the single sand blasting time is 5-13 seconds, and the sand blasting times is 2-5; then carrying out acid etching treatment on the implant subjected to sand blasting by using a mixed acid solution of sulfuric acid and hydrochloric acid, wherein the concentration of the hydrochloric acid is 18-36%, and the concentration of the sulfuric acid is 15-48%; and finally, cleaning the implant subjected to acid etching treatment. The particle size of TA4G medical titanium sand used in the sand blasting treatment is 40-80 meshes. The invention provides a novel sand blasting and acid etching surface treatment process, provides a better implant surface treatment solution, not only solves the problems in the prior art, but also brings about optimized surface structure, enhanced hydrophilicity and bone combination rate, reduced material pollution and stronger parameter controllability. Therefore, a better choice is provided for manufacturing and clinical application of the dental implant.

Description

Technical Field

[0001] The invention relates to the technical field of dental implant manufacturing, and in particular to a novel implant surface treatment method and device. Background Art

[0002] During the manufacturing process of dental implants, the surface treatment of the implant is crucial to the bone integration after implantation; excellent implant surface microstructure can effectively shorten the bone integration period and improve the bone integration rate of the implant, thereby ensuring the long-term stability of the implant.

[0003] At present, common implant surface treatment methods include hydroxyapatite spraying, anodizing, sandblasting, and sandblasting + acid etching, etc. Each method has its own unique advantages and limitations, but the common goal is to optimize the implant surface properties through different means to promote better bone integration.

[0004] Deficiencies of existing technology: 1. Material contamination risk: In traditional sandblasting + acid etching treatment, the commonly used sandblasting media (such as aluminum oxide, hydroxyapatite or calcium phosphate) is different from the base material of the implant (pure titanium or titanium alloy), which may introduce varying degrees of material contamination and affect the subsequent bone integration performance of the implant.

[0005] 2. Single surface morphology: When a single acid solution is used for acid etching, the resulting implant surface micromorphology is relatively simple, which limits the diversity and complexity of the implant surface structure and may not be conducive to the optimal bone integration effect.

[0006] 3. Lack of customized parameter control: The existing treatment process is not flexible enough in the parameter control during sandblasting and acid etching, and fails to finely adjust parameters such as air pressure, sandblasting distance, time, number of times, and acid concentration, ratio, temperature, etc. according to specific needs, resulting in poor consistency and predictability of treatment effects.

[0007] 4. Insufficient hydrophilicity: Traditional surface treatment methods have failed to fully improve the hydrophilicity of the implant surface, and good hydrophilicity is very important for accelerating the bone integration cycle and improving the bone integration rate.

[0008] Therefore, the prior art has deficiencies and needs further improvement. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides a novel implant surface treatment method and device.

[0010] To achieve the above object, the specific scheme of the present invention is as follows: The present invention provides a method for surface treatment of a dental implant, the method comprising the following steps: S1, TA4G medical titanium sand was used to sandblast the implant, where the sandblasting parameters were controlled at an air pressure of 0.18-0.25 MPa, a spray gun nozzle distance of 3-8 mm from the implant, a single sandblasting time of 5-13 seconds, and a sandblasting frequency of 2-5 times; S2, then etching the implant after sandblasting with a mixed acid solution of sulfuric acid and hydrochloric acid, wherein the concentration of hydrochloric acid is 18%-36%, the concentration of sulfuric acid is 15%-48%, and the volume ratio is 1:1; S3, finally cleaning the implant after acid etching.

[0011] Furthermore, in step S1, the particle size of TA4G medical titanium sand used in the sandblasting process is 40-80 mesh.

[0012] Furthermore, in step S2, the temperature of the acid solution during the acid etching treatment is controlled within the range of 50-80° C., and the time of the acid etching treatment is 15-70 minutes.

[0013] Further, in step S2, the ratio of hydrochloric acid to sulfuric acid in the mixed acid solution is adjusted according to the etching time and temperature to optimize the surface morphology.

[0014] Furthermore, step S2 also includes a pre-cleaning step before the acid etching treatment to remove grease and other pollutants on the surface of the implant to ensure the effect of subsequent treatment.

[0015] Furthermore, in step S3, after the acid etching treatment, the implant is flushed and rinsed with a large amount of purified water.

[0016] Furthermore, the cleaning step S3 further includes a drying step S4 to ensure that there is no water stain left on the surface of the implant, so as to prepare for subsequent medical applications.

[0017] The present invention also provides a device for surface treatment of dental implants, which is used to implement the above method, and the device comprises: Sandblasting machine: equipped with TA4G medical titanium sand supply system, it can perform sandblasting on implants according to preset parameters, air pressure 0.18-0.25Mpa, spray gun nozzle distance 3-8mm, sandblasting time 5-13 seconds, sandblasting times 2-5 times; Acid etching tank: contains a mixture of sulfuric acid and hydrochloric acid, with a hydrochloric acid concentration of 18%-36% and a sulfuric acid concentration of 15%-48%, a volume ratio of 1:1, and is equipped with a heating device to maintain the acid temperature in the range of 50-80°C, used for acid etching of implants after sandblasting; Cleaning equipment: with a purified water supply system for thorough cleaning of acid-etched implants; Control system: Integrates the operation of the above equipment to ensure that each step is accurately executed according to preset parameters and records key process data.

[0018] Furthermore, the sandblasting machine further includes an adjustable bracket, allowing precise adjustment of the distance between the spray gun nozzle and the implant to ensure consistency of the sandblasting effect; The acid etching tank is also equipped with a stirring device to keep the acid solution uniform, prevent precipitation and ensure consistent chemical reaction conditions.

[0019] Furthermore, the cleaning device also includes an ultrasonic cleaner for more thoroughly removing residues on the surface of the implant and improving the cleaning effect; The control system is connected to an external computer or network interface for remote monitoring and adjustment of processing parameters, providing greater flexibility and operational convenience.

[0020] The technical solution of the present invention has the following beneficial effects: 1. Optimized surface microstructure: By using TA4G medical titanium sand for sandblasting and then etching with a mixture of sulfuric acid and hydrochloric acid, a uniformly distributed primary, secondary and tertiary cavity structure can be formed. This multi-level structure effectively increases the surface area of ​​the implant and provides more attachment points for bone cells.

[0021] 2. Improve hydrophilic properties: The surface of the implant treated by this process shows higher hydrophilicity. The improvement of hydrophilicity helps to promote the formation of blood clots in the early stage of bone integration, thereby accelerating the growth of bone tissue to the implant surface and shortening the bone integration period.

[0022] 3. Enhance bone binding rate: The multi-level cavity structure and excellent hydrophilic properties work together to significantly improve the bonding rate between the implant and the surrounding bone tissue, ensuring the long-term stability and functionality of the implant in the body.

[0023] 4. Reduce the risk of material contamination: Using TA4G medical titanium sand, the same as the implant base material, as the sandblasting medium reduces the possibility of cross-contamination between different materials and ensures the purity and biocompatibility of the implant.

[0024] 5. Strong parameter controllability: The present invention provides a detailed parameter control range (such as air pressure, sandblasting distance, time, number of times, acid concentration, ratio and temperature), making the entire treatment process more accurate and controllable, and can be adjusted according to specific needs to obtain a consistent and predictable treatment effect.

[0025] 6. Wide applicability: This method is applicable to various types of implant materials (such as pure titanium or titanium alloys) and can be adapted to different clinical application scenarios by adjusting parameters, providing wide applicability and flexibility.

[0026] 7. The process is simple and easy: Although the present invention involves multiple processing steps, its operation flow is relatively simple, easy to implement, and can be quickly applied in existing manufacturing environments without requiring large additional investments in new equipment or technical modifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a system block diagram of the present invention; Figure 2 is a flow chart of the present invention; Figure 3 This is an electron microscope photo after sandblasting of the present invention; Figure 4 It is an electron microscope photograph after sandblasting and acid etching of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; it can be understood that the specific embodiments described herein are only used to explain the present invention rather than to limit the present invention; it should also be noted that, for ease of description, only the parts related to the present invention rather than all are shown in the accompanying drawings.

[0029] Combination Figure 1-Figure 4 As shown, the present invention provides a novel implant surface treatment method, which comprises the following steps: S1, TA4G medical titanium sand was used to sandblast the implant, where the sandblasting parameters were controlled at an air pressure of 0.18-0.25 MPa, a spray gun nozzle distance of 3-8 mm from the implant, a single sandblasting time of 5-13 seconds, and a sandblasting frequency of 2-5 times; S2, then etching the implant after sandblasting with a mixed acid solution of sulfuric acid and hydrochloric acid, wherein the concentration of hydrochloric acid is 18%-36%, the concentration of sulfuric acid is 15%-48%, and the volume ratio is 1:1; S3, finally cleaning the implant after acid etching.

[0030] Step S1, the TA4G medical titanium sand used for sandblasting has a particle size of 40-80 mesh.

[0031] Step S2, the temperature of the acid solution during the acid etching treatment is controlled within the range of 50-80° C., and the time of the acid etching treatment is 15-70 minutes.

[0032] Step S2, the ratio of hydrochloric acid to sulfuric acid in the mixed acid solution is adjusted according to the etching time and temperature to optimize the surface morphology.

[0033] Step S2 also includes a pre-cleaning step before the acid etching treatment to remove grease and other contaminants on the surface of the implant to ensure the effect of subsequent treatment.

[0034] Step S3, after the acid etching treatment, the implant is rinsed and cleaned with a large amount of purified water.

[0035] The cleaning step S3 also includes a drying step S4 to ensure that there is no water stain left on the surface of the implant, so as to prepare for subsequent medical applications.

[0036] The present invention also provides a device for surface treatment of dental implants, which is used to implement the above method, and the device comprises: Sandblasting machine: equipped with TA4G medical titanium sand supply system, it can perform sandblasting on implants according to preset parameters, air pressure 0.18-0.25Mpa, spray gun nozzle distance 3-8mm, sandblasting time 5-13 seconds, sandblasting times 2-5 times; Acid etching tank: contains a mixture of sulfuric acid and hydrochloric acid, with a hydrochloric acid concentration of 18%-36% and a sulfuric acid concentration of 15%-48%, a volume ratio of 1:1, and is equipped with a heating device to maintain the acid temperature in the range of 50-80°C, used for acid etching of implants after sandblasting; Cleaning equipment: with a purified water supply system for thorough cleaning of acid-etched implants; Control system: Integrates the operation of the above equipment to ensure that each step is accurately executed according to preset parameters and records key process data.

[0037] The sandblasting machine further includes an adjustable bracket that allows precise adjustment of the distance between the gun nozzle and the implant, ensuring consistent sandblasting results; The acid etching tank is also equipped with a stirring device to keep the acid solution uniform, prevent precipitation and ensure consistent chemical reaction conditions.

[0038] The cleaning equipment also includes an ultrasonic cleaner, which is used to more thoroughly remove residues on the surface of the implant and improve the cleaning effect; The control system is connected to an external computer or network interface for remote monitoring and adjustment of processing parameters, providing greater flexibility and operational convenience.

[0039] The dental implant surface treatment method of the present invention comprises the following key steps: Sandblasting: The implants were sandblasted with TA4G medical titanium sand to create a specific microscopic surface structure.

[0040] The control parameters include: air pressure (0.18-0.25Mpa), distance between the spray gun nozzle and the implant (3-8mm), single sandblasting time (5-13 seconds), number of sandblasting times (2-5 times) and titanium sand particle size (40-80 mesh). These parameters can be adjusted according to actual conditions.

[0041] Acid etching: After sandblasting, the implant needs to be etched with a mixture of sulfuric acid and hydrochloric acid to further optimize the surface morphology.

[0042] The specific composition of the mixed acid solution is: hydrochloric acid concentration of 18%-36%, sulfuric acid concentration of 15%-48%, mixed in a volume ratio of 1:1. The mixing ratio can be adjusted according to the etching time and temperature.

[0043] During acid etching, the implant is immersed in acid at a set temperature (50-80°C) for 15-70 minutes.

[0044] Cleaning treatment: After etching, the implant needs to be flushed and rinsed with large amounts of purified water to ensure that all residual chemicals are removed and ready for subsequent medical applications.

[0045] The surface of the implant treated through the above steps will form evenly distributed first, second and third level cavity structures, which effectively increases the surface area of ​​the implant and improves the hydrophilicity, which is beneficial to shorten the bone integration period and increase the bone bonding rate.

[0046] The dental implant surface treatment method of the present invention requires a series of specific equipment, which plays an important role in the process. The following are the main equipment required and their uses and interrelationships: Sandblasting machine: Purpose: Used for sandblasting of implants to form a specific microscopic surface structure.

[0047] Parameter control: including air pressure regulation, distance adjustment between the spray gun nozzle and the implant, sandblasting time control and sandblasting times setting.

[0048] Related Equipment: Needs to be connected to a compressed air source to provide the required air pressure and may need to be equipped with a control system to accurately manage the blasting parameters.

[0049] Sandblasting media supply system: Application: Provide 40-80 mesh TA4G medical titanium sand for sandblasting machine to ensure the consistency and purity of sandblasting materials.

[0050] Related equipment: usually includes storage tanks, delivery pipes and valves to ensure that titanium sand can be stably supplied to the spray gun.

[0051] Acid etching tank (or acid etching container): Purpose: It is used to contain the acid solution composed of sulfuric acid and hydrochloric acid, and immerse the sandblasted implant in it for acid etching.

[0052] Temperature control device: In order to maintain the temperature of the acid solution during the acid etching process (50-80°C), the acid etching tank should be equipped with a heater or temperature control system.

[0053] Stirring device: In order to keep the acid solution homogeneous, a stirring device may be provided to prevent sedimentation and ensure consistent chemical reaction conditions.

[0054] Cleaning system: Purpose: Used to clean implants after acid etching to remove residual acid and other impurities.

[0055] Purified water supply system: Must be able to provide large quantities of purified water to ensure that the implant is thoroughly rinsed.

[0056] Rinse Tank: Used for the final rinse step to ensure all chemicals are completely removed.

[0057] Safety protection equipment: Purpose: Since corrosive chemicals such as sulfuric acid and hydrochloric acid are used, the operation area should be equipped with necessary safety protection equipment, such as ventilation system, personal protective equipment (PPE), emergency shower and eye wash station.

[0058] Control system: Purpose: Integrate the operations of the above equipment to achieve automated or semi-automated process control and ensure that each step is accurately executed according to preset parameters.

[0059] Data recording: Key process parameters can be recorded and monitored to facilitate quality management and problem tracing.

[0060] These devices are interconnected through process flows to form a complete implant surface treatment production line. The sandblasting machine and the sandblasting medium supply system work together to complete the first step of surface pretreatment; then, the acid etching tank and its auxiliary system are responsible for chemical treatment; finally, the cleaning system ensures the safety and cleanliness of the finished product. At the same time, the entire process is coordinated by the control system to ensure that each link can operate efficiently and safely.

[0061] How it works 1. Sandblasting stage Choose the right sandblasting material: Use TA4G medical titanium sand, the same as the implant base material, as the sandblasting medium to reduce the risk of cross-contamination between different materials and ensure biocompatibility.

[0062] Control the sandblasting parameters: sandblasting is performed under specific conditions of air pressure (0.18-0.25Mpa), distance between the spray gun nozzle and the implant (3-8mm), single sandblasting time (5-13 seconds) and number of sandblasting times (2-5 times). These parameters are selected and controlled to form an ideal surface microstructure, that is, evenly distributed primary, secondary and tertiary cavities.

[0063] Purpose: To create a microstructure with a large surface area and rich layers on the implant surface through the sandblasting process, laying the foundation for subsequent acid etching treatment.

[0064] 2. Acid etching stage Use mixed acid: Sulfuric acid (concentration 15%-48%) and hydrochloric acid (concentration 18%-36%) are mixed in a volume ratio of 1:1 to form a composite acid etching solution. This mixed acid solution can produce more complex chemical reactions, thereby forming a diverse surface morphology that is more conducive to bone integration.

[0065] Controlled etching conditions: Immerse the sandblasted implant in an acid solution at a set temperature (50-80°C) for 15-70 minutes. Precise control of temperature and time is critical to achieving the desired surface properties, as they directly affect the speed and depth of the etching reaction.

[0066] Purpose: To further modify the surface structure formed by sandblasting through acid etching, make the surface cavity more uniform and fine, and increase the hydrophilicity of the implant surface to provide a better attachment environment for bone cells.

[0067] 3. Cleaning stage Removal of residues: After the acid etching treatment, there may be acid and other impurities on the surface of the implant. It must be thoroughly rinsed and washed with large amounts of purified water to ensure that all chemicals are completely removed.

[0068] Purpose: To ensure the cleanliness of the implant surface, avoid any residual substances that may affect the biocompatibility after implantation, and ensure its safety and functionality.

[0069] Comprehensive effect: Through the above three-stage processing, the present invention achieves the following comprehensive effects: Multi-level cavity structure: evenly distributed first, second and third level cavities are formed, which significantly increases the implant surface area and provides more bone cell attachment points.

[0070] Enhanced hydrophilicity: Improved the hydrophilicity of the implant surface, promoted the formation of initial blood clots and bone tissue growth, and shortened the bone integration period.

[0071] Improve bone integration rate: The optimized surface structure and excellent hydrophilic properties work together to improve the integration rate between the implant and the surrounding bone tissue, ensuring long-term stability and functionality.

[0072] Reduced material contamination: Since the sandblasting medium is the same as the implant base material, the risk of cross-contamination between different materials is reduced and biocompatibility is guaranteed.

[0073] In summary, the working principle of the present invention is to optimize the implant surface through precisely controlled sandblasting and acid etching processes, thereby achieving a better bone integration effect, and providing important technical support for the application of dental implants.

[0074] The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the protection scope of the present invention.

Claims

1. A method for surface treatment of dental implants, characterized in that: The method comprises the following steps: S1, TA4G medical titanium sand was used to sandblast the implant, where the sandblasting parameters were controlled at an air pressure of 0.18-0.25 MPa, a spray gun nozzle distance of 3-8 mm from the implant, a single sandblasting time of 5-13 seconds, and a sandblasting frequency of 2-5 times; S2, then etching the implant after sandblasting with a mixed acid solution of sulfuric acid and hydrochloric acid, wherein the concentration of hydrochloric acid is 18%-36%, the concentration of sulfuric acid is 15%-48%, and the volume ratio is 1:1; S3, finally cleaning the implant after acid etching.

2. The method according to claim 1, characterized in that Step S1, the TA4G medical titanium sand used for sandblasting has a particle size of 40-80 mesh.

3. The method according to claim 1, characterized in that Step S2, the temperature of the acid solution during the acid etching treatment is controlled within the range of 50-80° C., and the time of the acid etching treatment is 15-70 minutes.

4. The method according to claim 1, characterized in that: Step S2, the ratio of hydrochloric acid to sulfuric acid in the mixed acid solution is adjusted according to the etching time and temperature to optimize the surface morphology.

5. The method according to claim 1, characterized in that Step S2 also includes a pre-cleaning step before the acid etching treatment to remove grease and other contaminants on the surface of the implant to ensure the effect of subsequent treatment.

6. The method according to claim 1, characterized in that Step S3, after the acid etching treatment, the implant is rinsed and cleaned with a large amount of purified water.

7. The method according to claim 1, characterized in that The cleaning step S3 also includes a drying step S4 to ensure that there is no water stain left on the surface of the implant, so as to prepare for subsequent medical applications.

8. A device for treating the surface of a dental implant, used to implement the method according to any one of claims 1 to 7, characterized in that: The device includes: Sandblasting machine: equipped with TA4G medical titanium sand supply system, it can perform sandblasting on implants according to preset parameters, air pressure 0.18-0.25Mpa, spray gun nozzle distance 3-8mm, sandblasting time 5-13 seconds, sandblasting times 2-5 times; Acid etching tank: contains a mixture of sulfuric acid and hydrochloric acid, with a hydrochloric acid concentration of 18%-36% and a sulfuric acid concentration of 15%-48%, a volume ratio of 1:1, and is equipped with a heating device to maintain the acid temperature in the range of 50-80°C, used for acid etching of implants after sandblasting; Cleaning equipment: with a purified water supply system for thorough cleaning of acid-etched implants; Control system: Integrates the operation of the above equipment to ensure that each step is accurately executed according to preset parameters and records key process data.

9. The device according to claim 8, characterized in that The sandblasting machine further includes an adjustable bracket that allows precise adjustment of the distance between the gun nozzle and the implant, ensuring consistent sandblasting results; The acid etching tank is also equipped with a stirring device to keep the acid solution uniform, prevent precipitation and ensure consistent chemical reaction conditions.

10. The device according to claim 8, characterized in that The cleaning equipment also includes an ultrasonic cleaner, which is used to more thoroughly remove residues on the surface of the implant and improve the cleaning effect; The control system is connected to an external computer or network interface for remote monitoring and adjustment of processing parameters, providing greater flexibility and operational convenience.

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