CN214318173U

CN214318173U - 3D prints implant of taking arc pipeline

Info

Publication number: CN214318173U
Application number: CN202120046984.2U
Authority: CN
Inventors: 蒋欣泉; 张文杰; 吴晓琳
Original assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Current assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-10-01
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses an implant of taking arc pipeline that 3D printed for implant patient's alveolar bone and plant the nest, the implant includes: the bone joint structure comprises a compact core body and a bone joint part wrapped outside the compact core body; the bone-engaging portion includes a first porous portion and a second porous portion; the first porous part is connected with the top surface of the second porous part; a plurality of arc-shaped pipelines are arranged in the first porous part; the arc pipeline is provided with openings at two ends and is communicated with the outside through the openings; the arc-shaped pipeline extends into the cleaning component through the opening to clean the interior of the arc-shaped pipeline. The interior of the arc-shaped conduit can be loaded with a drug (such as BMP-2, VEGF, PDGF, etc.) to induce rapid bone tissue ingrowth. The utility model has the characteristics of intensity is good, and bone union portion elastic modulus matches with patient's elastic modulus, easily clearance. The utility model discloses the adaptation disease is wider general, is applicable to all kinds of edentulous patients especially alveolar bone volume or the not enough condition of bone density.

Description

3D prints implant of taking arc pipeline

Technical Field

The utility model relates to an oral implant technical field, concretely relates to implant of taking arc pipeline that 3D printed.

Background

At present, the dental implant restoration is one of the conventional restoration methods for dentition defects and deletions. Titanium and titanium alloy are used as the most common implant materials in clinic, the elastic modulus (110GPa) of the titanium and titanium alloy is far higher than that of a human jaw bone (the elastic modulus of cortical bone is 3-30GPa, and the elastic modulus of cancellous bone is 0.5-3GPa), and a stress shielding effect is generated, so that bone absorption is caused, and the implant is loosened, sunk and even dislocated. In addition, some patients suffer from periodontal diseases, osteoporosis, diabetes, tumors and other diseases, the alveolar bone mass is insufficient or the cancellous bone density is lower than that of normal people, which puts higher requirements on the bone combining force of the implant.

In daily life, because the oral cavity is not cleaned well, bacteria can adhere to and grow around the implant, so that the tissues around the implant are inflamed, and peri-implant inflammation is generated. Periimplantitis an inflammatory lesion with plaque infection as an initiating factor. When microorganisms, particularly pathogenic bacteria, adhere and colonize on the surface of an implant to form a biological membrane, endogenous immune imbalance caused by virulence factors becomes a potential risk for causing peri-implantitis. When the peri-implantitis is serious, bone tissues around the implant can generate a bone absorption phenomenon, namely, the volume of the bone tissues is gradually reduced, the height of a bone surface is reduced, the top of the implant is exposed, so that the stability of combining the implant and the alveolar bone is reduced, the implant falls off, and the implant fails to be implanted. And once the bone absorption phenomenon around the implant occurs, the bone absorption phenomenon is not easy to reverse, so the postoperative maintenance of the implant is particularly important, and the prevention of the peri-implantitis is more important than the treatment. At present, doctors usually use an ultrasonic dental scaler (such as a novel practical ultrasonic dental scaler: CN 212140643U; patent of the invention: CN112043443A visual dental scaler) to clean the surface of an implant, so that the working tip of the dental scaler lightly touches the dental plaque, and the dental plaque is removed by ultrasonic vibration.

The existing implant is mostly communicated with a hole structure to reduce the overall elastic modulus of the material, so that the mechanical property of the implant is more matched with that of human skeleton, however, when the soft tissue around the implant generates inflammation, the hole is difficult to clean by the structural design of the existing implant, and the anti-inflammation treatment effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at improving the current planting body, providing a 3D who easily clears up the internal bacterial plaque of planting body prints takes the planting body of arc pipeline.

In order to achieve the above object, the utility model provides a 3D prints takes implant of arc pipeline for implant in patient's alveolar bone planting nest, the implant includes: a dense core and a bone-engaging portion surrounding the dense core; the bone-engaging portion includes a first porous portion and a second porous portion; the first porous portion is connected to a top surface of the second porous portion; a plurality of arc-shaped pipelines are arranged in the first porous part; the two ends of the arc pipeline are provided with openings and are communicated with the outside through the openings; the arc-shaped pipeline extends into the cleaning component through the opening to clean the interior of the arc-shaped pipeline.

Optionally, the arc-shaped pipe is bent towards the dense core body and is close to the dense core body.

Optionally, the arc-shaped pipeline is in a semicircular ring shape.

Optionally, the pipe diameter of the arc-shaped pipeline is 0.5mm-0.7 mm.

Optionally, a plurality of porous structures are formed in the second porous portion, and an average elastic modulus of the whole bone combining portion is the same as an average bone elastic modulus of the alveolar bone of the patient.

Optionally, the arc-shaped pipeline is not communicated with the porous structure.

Optionally, the arc-shaped conduit and the interior of the porous structure are loaded with a drug for inducing bone tissue ingrowth.

Optionally, the bone-engaging portion further comprises: the connecting part is connected with the top surface of the first porous part, and the inside of the connecting part is free of pores or is provided with pores which are not communicated with the outside.

Optionally, the cleaning component is a working tip of a dental scaler.

Optionally, the preparation method of the 3D printed implant with the arc-shaped conduit includes the following steps:

(1) determining the material of the implant, then carrying out preoperative jaw quantitative CT shooting on the patient, and calculating the average bone elastic modulus of the alveolar bone of the patient; (2) designing the pipe diameter and the number of the arc-shaped pipelines according to the average bone elasticity modulus of a patient; (3) and personalized preparation of the implant by using 3D printing equipment.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses under the circumstances that bone absorption took place for peri-implantitis, the tip of scaler can stretch into the part that is close to fine and close core to the arc pipeline, clears up arc pipeline wholly.

(2) Compare with straight shape pipeline, the utility model discloses an arc pipeline does not contain edges and corners, and at the in-process that the scaler washd the bacterial plaque, the inside sparge water of arc pipeline changes and flows.

(3) The utility model discloses a fine and close core structure has guaranteed the bulk strength of implant, has reduced the holistic elastic modulus of implant through bone union portion, is showing and has reduced stress shielding phenomenon.

(4) The utility model discloses an outer spiral of osseointegration portion lateral wall has increased the osseointegration area, is favorable to the long-term stability of the inseparable combination of implant and alveolar bone and implant, even also can undertake more load under the condition that alveolar bone is highly not enough.

(5) The utility model discloses can load the medicine of multiple difference or the factor that promotes the bone in the inside different positions of single arc pipeline, reach the medicine slow-release's effect step by step.

(6) The utility model discloses an adjustment arc pipeline pipe diameter, figure, turn angle isoparametric can change the density of planting body, performance such as intensity and elastic modulus to satisfy the use needs of clinical different positions, alveolar bone condition.

(7) The utility model discloses a 3D prints integration preparation, and the flexibility is good, can accomplish individualized design, simple process, and is with low costs.

Drawings

Fig. 1 is the utility model discloses a 3D prints takes the structure schematic diagram of the planting body of arc pipeline.

Fig. 2 is the utility model discloses a 3D prints the longitudinal section schematic diagram of the implant of taking the arc pipeline.

Fig. 3 is the utility model discloses a cross section schematic diagram of the implant of taking arc pipeline that 3D printed.

In the figure: 10-head, 11-groove; 20-body, 21-dense core, 22-osseointegration, 221-connection, 222-first porous, 223-second porous, 224-arc channel.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the utility model discloses a 3D prints implant with arc pipeline for implant in patient's alveolar bone planting nest, the top of planting the body is connected with the prosthesis through the foundation pile, supports the prosthesis. The implant includes: a head 10 and a body 20 connected to the bottom surface of the head 10; the head 10 is a transgingival part and the body 20 is a osseointegrated part. The body 20 comprises: a dense core body 21 and a bone-engaging portion 22 surrounding the exterior of the dense core body 21; the bone-engaging portion 22 includes: a first porous portion 222, a second porous portion 223; the first porous portion 222 is connected to the top surface of the second porous portion 223; a plurality of arcuate conduits 224 are formed within the first porous section 222; openings are formed in two ends of the arc-shaped pipeline 224, and the arc-shaped pipeline 224 is communicated with the outside through the openings; the arc tube 224 is internally cleaned by a cleaning member which protrudes from the opening into the interior of the arc tube 224. Compared with the hole structure, the utility model discloses a 3D prints takes the planting body of arc pipeline at plaque clearance in-process, and cleaning element can stretch into the part that is close to fine and close core 21 to arc pipeline 224, cleans arc pipeline 224 wholly.

After the implant is implanted into the alveolar bone of a patient, pathogenic bacteria can adhere to the periphery of the implant due to poor oral cavity cleaning of the patient, so that the soft tissue around the implant is inflamed, and peri-implant inflammation is caused. When the peri-implant inflammation of the patient is serious, the inflammation of the soft tissue may be involved in the bone bed, so that the bone tissue around the implant is subjected to a bone resorption phenomenon, that is, the bone surface height of the bone tissue is lowered, and the first porous portion 222 is exposed. In some embodiments, the first porous section 222 has a thickness of 1 mm. During the treatment process, doctors need to firstly clean bacterial plaques on the surface of the implant and inside the implant, remove pathogenic bacteria around the implant and then carry out subsequent anti-inflammation treatment. The utility model discloses the inside plaque clearance step of the planting body of taking arc pipeline that 3D printed is as follows:

firstly, a working switch of the ultrasonic tooth cleaner is turned on, and the power of the tooth cleaner is adjusted according to the size of bacterial plaque attached to an implant of a patient, so that the power of the tooth cleaner is proper and the implant is not damaged; then, the handle part of the scaler is held to extend the working tip into the implant, so that the head end part of the working tip lightly touches the bacterial plaque, and the bacterial plaque is vibrated and fallen by ultrasonic vibration. Because the temperature of the working tip is gradually increased in the ultrasonic vibration process, the ultrasonic vibration is carried out to shake off the bacterial plaque, and simultaneously, washing water is sprayed into the implant to cool the working tip and wash the implant, so that the shaken bacterial plaque flows out of the implant.

The 'working tip' is a fitting which is arranged at the end part of the handle of the ultrasonic tooth cleaner and is used for cleaning teeth or an implant, and a doctor cleans the teeth or the implant by contacting the head of the working tip with the teeth or the implant and performing operations such as scraping, grinding, drilling, swinging and washing root canals and the like in the treatment process.

The utility model sets the pipe diameter of the arc-shaped pipeline 224 to be 0.5mm-0.7mm, and the arc-shaped pipeline 224 in the range allows the working tip of the tooth cleaner to extend into the arc-shaped pipeline 224 to clean the whole arc-shaped pipeline 224.

In the embodiment of FIG. 3, the middle of the curved tube 224 is curved toward the dense core 21, and the curved tube 224 is symmetrical, so that after cleaning one end of the curved tube 224, the physician can use the same tip to clean the other end of the curved tube 224.

The arc-shaped pipe 224 of the present invention is arranged in the bone combining part 22 along the horizontal or non-horizontal direction; in some embodiments, the line connecting the two ends of the arc-shaped pipe 224 forms an angle of 0-15 ° with the horizontal plane.

The volume of the arcuate tube 224 in the first porous portion 222 is preferably maintained during the implant design process, i.e., while ensuring sufficient strength to securely support the prosthesis at the top of the implant, the arcuate tube allows bone tissue around the implant to grow into the implant, thereby securely bonding the implant to the alveolar bone. In some embodiments, the arcuate conduit 224 comprises 30% to 90% of the volume of the first porous section 222, and the arcuate conduit 224 within this range ensures that the first porous section 222 has sufficient strength to support the prosthesis without causing the implant to be too strong and interfering with the ingrowth of bone tissue into the patient.

In order to further promote the combination of alveolar bone and implant, the inside of the arc-shaped conduit 224 of the present invention can be loaded with active factors (such as BMP-2, VEGF, PDGF), elements (strontium, zinc, magnesium, calcium), anti-infective drugs (silver ion, gentamicin), etc. for promoting the growth of bone tissue. Preferably, different drugs or bone-promoting factors can be loaded at different positions in the single arc-shaped pipe 224, so that the drugs are gradually released, and different drugs are applied at different stages of bone tissue growth, thereby achieving a better bone combination effect.

In order to make the mechanical properties of the implant more compatible with the human skeleton, the implant needs to have a further reduced elastic modulus. In some preferred embodiments, therefore, the second porous portion 223 is augmented with a porous structure, such as holes or tubes. However, in order to prevent bacteria from the first porous portion 222 from growing to the second porous portion 223 along the hole or tube inside the implant, the arc-shaped tube 224 of the present invention is not communicated with the hole or tube of the second porous portion 223.

As shown in fig. 2, in order to further reduce bacteria introduced into the inside of the implant, the bone-engaging portion 22 of the present invention further includes: a connection portion 221, the connection portion 221 being connected to a top surface of the first porous portion 222; the connection portion 221 increases the distance between the first porous portion 222 and the soft tissue of the patient, preventing pathogenic bacteria in the soft tissue from entering the inside of the arc-shaped duct 224. The connection part 221 of the present invention is not connected to the outside, and the inside thereof may be a solid structure or a porous structure; the thickness of the connection portion 221 is about 1-2 mm.

Continuing to refer to fig. 2, the inside of the implant with the arc-shaped pipe 224 for 3D printing of the present invention is provided with a groove 11 for installing the foundation pile, the groove 11 has an internal thread, and the foundation pile is screwed with the implant through the internal thread. Wherein, the top of the foundation pile is connected with the prosthesis to play the roles of supporting, fixing and stabilizing the prosthesis.

The utility model ensures the whole strength of the implant through the compact core body 21 so as to stably support the prosthesis; the elastic modulus of the entire implant is reduced by the bone-engaging portion 22 to reduce the stress shielding phenomenon. In some embodiments, the ratio of the thickness of the dense core body 21 to the thickness of the bone-engaging portion 22 is 1:1 to 1:2, and the total thickness of the two is 3.3mm to 4.8 mm.

The utility model discloses bone combining portion 22's lateral wall is equipped with the external screw thread, and the external screw thread is for following the thin tooth cockscomb structure that somatic part 20 encircleed the distribution, and the screw thread form can be for screw thread rising formula or fin formula, and pitch is 0.8mm, and the screw thread is 6.5mm in footpath greatly. The utility model discloses a bone combining portion 22 has increased the area with the bone combination through the external screw thread, is favorable to the inseparable combination of implant and alveolar bone, is favorable to the long-term stability of implant, even also can undertake more load under the circumstances that alveolar bone is highly not enough. In some embodiments, the utility model discloses can print the integration preparation by 3D, the rethread external screw thread screw in is equipped with planting nest.

The utility model discloses a take implant of arc pipeline that 3D printed can design into various shapes that clinical commonly used, including conical, cylindricality, improvement taper shape etc. adopt pure titanium, titanium alloy, pottery, polymer organic material, the oral cavity planting material that can be used to 3D printing such as PEEK makes.

The utility model also provides a preparation method of the planting body of 3D printing area arc pipeline, including following step:

(1) the implant material can be determined to be pure titanium, titanium alloy, ceramic, high molecular organic material, such as PEEK and other oral implant materials which can be used for 3D printing.

(2) The method comprises the steps of carrying out jaw bone quantitative CT shooting on a patient before an operation, carrying out three-dimensional reconstruction on CT scanning data of the patient by using computer software according to the CT scanning data, selecting a cross section CT scanning image passing through a midpoint of an edentulous region, designing the position of an implant on the cross section image by using the computer software, and calculating the average bone elastic modulus of alveolar bone of the patient according to the bone mass and the bone density of the patient (specifically, please refer to the invention patent: CN104352285B, a design and manufacturing method of an individualized 3D printing implant).

(3) Preparing the implant by using a 3D printing technology: the utility model discloses can adjust arc pipeline 224's pipe diameter, figure, angle isoparametric that turns according to patient's average bone elastic modulus, design the position and the size of planting body (if 4.8mm 5mm or 4.1mm 10mm), make the holistic average elastic modulus of bone combining portion 22 the same with patient's the average bone elastic modulus of alveolar bone, reach bone elastic modulus's best matching effect.

Example 1

The present embodiment provides a 3D printed implant with an arc-shaped channel, the bone-engaging portion 22 of the implant comprising: a first porous portion 222 and a second porous portion 223; conduits are opened in both the first porous portion 222 and the second porous portion 223: an arc-shaped pipeline 224 is arranged in the first porous part 222 so that the cleaning component can extend into the first porous part for cleaning; the duct opened in the second porous portion 223 may be a straight duct or an arc duct, and the elastic modulus of the bone-engaging portion 22 may be reduced.

Example 2

The 3D printed implant with the arc-shaped conduit of the present embodiment is similar to that of embodiment 1, except that holes are formed in the second porous portion 223; also, the portion of the second porous portion 223 close to the dense core 21 has a low porosity to firmly support the dense core; the portion of the second porous portion 223 adjacent to the alveolar bone has a high porosity to promote the ingrowth of bone tissue. Further, the porosity of the second porous portion 223 gradually increases and gradually changes in a gradient manner from the dense core body 21 to the alveolar bone, so as to effectively reduce the occurrence of the stress concentration phenomenon inside the implant.

Example 3

The present embodiment provides a 3D printed implant with an arc-shaped channel, the bone-engaging portion 22 of the implant comprising: a connecting portion 221, a first porous portion 222, a second porous portion 223; the connection part 221 is connected with the top surface of the first porous part 222, so that the distance between the first porous part 222 and the soft tissue of the patient is increased, and pathogenic bacteria in the soft tissue are prevented from entering the inner part of the arc-shaped pipeline 224; the first porous portion 222 has an arc-shaped pipe 224 therein, and the second porous portion 223 has a porous structure therein, wherein the porous structure may be the same pipe structure as the arc-shaped pipe 224, or a different porous structure from the arc-shaped pipe 224, and the porous structure is not communicated with the arc-shaped pipe 224.

To sum up, the utility model discloses at bacterial plaque clearance in-process, the tip of scaler can stretch into the part that is close to the fine and close core to the arc pipeline, clears up arc pipeline is whole, and the clearance effect is better. The utility model discloses a 3D printing technique preparation the planting body, its flexibility is good, can accomplish individualized design, simple process, and is with low costs.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. A3D printed implant with an arc-shaped conduit for implantation in an alveolar bone graft socket of a patient, the implant comprising: a dense core and a bone-engaging portion surrounding the dense core; the bone-engaging portion includes a first porous portion and a second porous portion; the first porous portion is connected to a top surface of the second porous portion; a plurality of arc-shaped pipelines are arranged in the first porous part;

the two ends of the arc pipeline are provided with openings and are communicated with the outside through the openings; the arc-shaped pipeline extends into the cleaning component through the opening to clean the interior of the arc-shaped pipeline.

2. The 3D printed curved cannulated implant of claim 1, wherein the curved cannulation curves in a direction toward and in proximity to the densified core.

3. The 3D printed curved cannulated implant of claim 1, wherein the curved cannulation is semi-circular.

4. The 3D printed arcuate channeled implant of claim 1, wherein the arcuate conduit has a tube diameter of 0.5mm to 0.7 mm.

5. The 3D printed curved cannulated implant of claim 1, wherein a plurality of porous structures are formed within the second porous portion and the aggregate mean modulus of elasticity of the osseointegration portion is the same as the mean modulus of elasticity of the patient's alveolar bone.

6. The 3D printed curved cannulated implant of claim 5, wherein the curved cannulation is not in communication with the porous structure.

7. The 3D printed curved cannulated implant of claim 5, wherein the curved cannulation and the interior of the porous structure are loaded with a drug for inducing bone tissue ingrowth.

8. The 3D printed curved cannulated implant of claim 1, wherein the bone-engaging portion further comprises: the connecting part is connected with the top surface of the first porous part, and the inside of the connecting part is free of pores or is provided with pores which are not communicated with the outside.

9. The 3D printed curved cannulated implant of claim 1, wherein the cleaning element is a tip of a dental scaler.