阅读说明：本技术 牙胶尖 (Gutta-percha point ) 是由 严靖轩 王红苹 于 2021-01-13 设计创作，主要内容包括：本发明公开一种牙胶尖,所述牙胶尖包括封闭段及与所述封闭段连接的充填段,按照重量份数计,所述封闭段包括古塔波胶A1份和填充剂B1份,所述充填段包括古塔波胶A2份和填充剂B2份,其中A1小于A2,且B1大于B2。本发明的牙胶尖采用分段式设计,使得封闭段的硬度高,容易操作和密封,同时,使得充填段的熔断温度较低,提高了热塑性,容易剪断,从而使得牙胶尖的封闭段和充填段均能充分发挥各自的优势,提升了牙胶尖的整体使用效果。(The invention discloses a gutta-percha tip which comprises a closed section and a filling section connected with the closed section, wherein the closed section comprises, by weight, gutta-percha A1 parts and a filling agent B1 parts, and the filling section comprises gutta-percha A2 parts and a filling agent B2 parts, wherein A1 is smaller than A2, and B1 is larger than B2. The gutta-percha point adopts a sectional design, so that the closed section has high hardness and is easy to operate and seal, meanwhile, the fusing temperature of the filling section is lower, the thermoplasticity is improved, the filling section is easy to cut, the closed section and the filling section of the gutta-percha point can fully exert respective advantages, and the integral using effect of the gutta-percha point is improved.)

1. A gutta-percha point comprises a closed section and a filling section connected with the closed section, and is characterized in that the closed section comprises, in parts by weight, gutta-percha A1 parts and a filling agent B1 parts, and the filling section comprises gutta-percha A2 parts and a filling agent B2 parts, wherein A1 is smaller than A2, and B1 is larger than B2.

2. The gutta-percha point as in claim 1, wherein said closed section comprises 50 to 80 parts by weight of a filler, B1, and said filling section comprises 45 to 75 parts by weight of a filler, B2.

3. The gutta-percha point as in claim 2 wherein said closed segment comprises 20 to 50 parts by weight of gutta-percha, A1, and said filled segment comprises 25 to 55 parts by weight of gutta-percha, A2.

4. The gutta-percha tip as in claim 3, wherein a ratio of the weight part of the gutta-percha contained in said filling segment to the weight part of the gutta-percha contained in said closing segment is 1.25 to 2.

5. The gutta-percha tip as in claim 4, wherein a ratio of a weight part of the filler contained in said sealing section to a weight part of the filler contained in said filling section is 1.05 to 1.33.

6. The gutta-percha tip as in claim 3 wherein said closed section comprises 20 parts of gutta-percha and 80 parts of filler, and said filled section comprises 30 parts of gutta-percha and 70 parts of filler.

7. The gutta percha point as in claim 1, wherein said filler comprises zinc oxide.

8. The gutta percha point as in claim 7, wherein said filler further comprises barium sulfate.

9. The gutta-percha point as in any one of claims 1 to 8, wherein said closed section has a length a and said filling section has a length b, wherein a/b is greater than or equal to 0.2 and less than or equal to 0.4.

10. The gutta-percha point as in claim 9, wherein said closed section has a length of 2mm to 5mm, and said filling section has a length of 10mm to 25 mm.

11. The gutta-percha point as in any one of claims 1 to 8, wherein said filling segment further comprises 5 to 25 parts by weight of boron nitride.

12. The gutta percha point as in claim 11 wherein a mass ratio of said filler to said boron nitride in said filling segment is 2 to 8.

13. The gutta percha point as in claim 12 wherein a mass ratio of said filler to said boron nitride in said filling segment is 5 to 8.

14. The gutta-percha point as in any one of claims 1 to 8, wherein said filling section further comprises 2 to 10 parts by weight of an antibacterial agent.

15. The gutta-percha tip as in claim 14, wherein said antibacterial agent is at least one of nano silver, nano titanium dioxide and cationic surfactant.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a gutta-percha point.

Background

Root canal therapy (root canal therapy) is the most commonly used internationally effective treatment for endodontic and periapical diseases. The principle of endodontics is to remove most of the infectious material in the root canal by mechanical and chemical means and to prevent the occurrence of periapical lesions or to promote the healing of already occurring periapical lesions by filling the root canal, closing the crown.

The most important step in root canal treatment is filling the root canal with gutta-percha points. However, the existing gutta-percha point generally adopts an integrated structure design, namely, the components and specific gravity of the closed section and the filling section of the gutta-percha point are completely consistent. This results in that the advantages of the sections (the closed section and the filling section) of the gutta percha point cannot be fully exerted, thereby limiting the use of the gutta percha point.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

Disclosure of Invention

The invention mainly aims to provide a gutta-percha point, and aims to solve the technical problem that the advantages of each section of the gutta-percha point cannot be fully exerted in the prior art.

In order to achieve the purpose, the invention provides a gutta-percha point, which comprises a closed section and a filling section connected with the closed section, wherein the closed section comprises, by weight, gutta-percha A1 parts and a filling agent B1 parts, and the filling section comprises gutta-percha A2 parts and a filling agent B2 parts, wherein A1 is smaller than A2, and B1 is larger than B2.

In one embodiment, the weight part of the filler contained in the closing section B1 is 50-80, and the weight part of the filler contained in the filling section B2 is 45-75.

In one embodiment, the closed section comprises 20 to 50 parts by weight of gutta percha A1, and the filled section comprises 25 to 55 parts by weight of gutta percha A2.

In one embodiment, the ratio of the weight portion of the gutta-percha contained in the filling section to the weight portion of the gutta-percha contained in the closing section is 1.25 to 2.

In one embodiment, the ratio of the weight part of the filler contained in the closed section to the weight part of the filler contained in the filling section is 1.05 to 1.33.

In one embodiment, the closed section comprises 20 parts of gutta-percha and 80 parts of filler, and the filled section comprises 30 parts of gutta-percha and 70 parts of filler.

In one embodiment, the filler comprises zinc oxide.

In one embodiment, the filler further comprises barium sulfate.

In one embodiment, the length of the closing section is a, and the length of the filling section is b, wherein a/b is greater than or equal to 0.2 and less than or equal to 0.4.

In one embodiment, the length of the closing section is 2 mm-5 mm, and the length of the filling section is 10 mm-25 mm.

In one embodiment, the filling segment further comprises 5 to 25 parts by weight of boron nitride.

In one embodiment, the mass ratio of the filler to the boron nitride is 2 to 8.

In one embodiment, the mass ratio of the filler to the boron nitride is 5 to 8.

In one embodiment, the filling section further comprises 2-10 parts by weight of an antibacterial agent.

In one embodiment, the antimicrobial agent is at least one of nano silver, nano titanium dioxide and cationic surfactant

The gutta-percha point comprises a closed section and a filling section connected with the closed section, wherein the closed section comprises, by weight, gutta-percha A1 parts and a filling agent B1 parts, and the filling section comprises the gutta-percha A2 parts and the filling agent B2 parts, wherein A1 is smaller than A2, and B1 is larger than B2. Therefore, the gutta-percha point adopts a sectional design, so that the content of the filler contained in the closed section is higher than that of the filler contained in the filling section (B1 is higher than B2), namely the content of the filler is increased in the closed section, so that the closed section has higher hardness, and the gutta-percha point is easy to place in a root canal and is easy to operate and seal; meanwhile, the content of the gutta-percha contained in the closed section is lower than that contained in the filling section (A1 is smaller than A2), namely the filling section increases the content of the gutta-percha, and the fusing temperature of the filling section can be reduced due to the increase of the content of the gutta-percha, so that the thermoplasticity of the filling section is improved, and the filling section is easy to cut. Therefore, the sealing section and the filling section of the gutta-percha point can fully exert respective advantages, and the overall using effect of the gutta-percha point is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of the structure of the gutta percha point of the present invention.

FIG. 2 is a schematic representation of the use of the gutta percha point of the present invention in the interior of a tooth.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Gutta-percha point	12	Filling segment
11	Closing section	13	Operating section

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be noted that if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The invention provides a gutta-percha point.

Referring to fig. 1 and 2, the present invention provides a gutta-percha point 10, wherein the gutta-percha point 10 includes a closed section 11 and a filling section 12 connected to the closed section 11, the closed section 11 includes, in parts by weight, gutta-percha a1 parts and a filler B1 parts, and the filling section 12 includes gutta-percha a2 parts and a filler B2 parts, wherein a1 is less than a2, and B1 is greater than B2.

In particular, the closing section 11 is arranged in a cone shape, such as a cone shape, so that the closing section 11 is adapted to the shape of the root canal cavity, so that the closing section 11 can be tightly fitted to the root canal cavity, thereby filling the root canal well. In general, to avoid irritation or damage to the apical tissue of the tooth by the closed section 11, the head of the closed section 11 is of a bulb-shaped configuration. The filling section 12 is connected with the tail part of the closed section 11, the outer diameter of the filling section 12 is larger than that of the closed section 11, the filling section 12 is used for extending into the root canal, and the redundant part of the filling section 12 is fused to ensure that the whole gutta-percha point 10 is completely inserted into the root canal. Optionally, the shape of the filling segment 12 is adapted to the shape of the root canal so that the filling segment 12 tightly fills the root canal. The filling section 12 may be cylindrical or truncated cone shaped.

In the prior art, the gutta-percha point 10 is generally designed in an integrated manner, that is, the components and the proportion of the closed section 11 and the filling section 12 of the gutta-percha point 10 are completely the same, although the processing technology is simpler, the requirements of high hardness of the closed section 11 and thermoplasticity of the filling section 12 need to be considered at the same time, a compromise method is often needed, so that the hardness of the closed section 11 of the gutta-percha point 10 cannot reach an optimal value, and the thermoplasticity of the filling section 12 of the gutta-percha point 10 cannot reach the optimal value, so that the overall using effect of the gutta-percha point 10 is influenced. The gutta-percha point 10 of the present invention is designed in a sectional manner, that is, the closed section 11 and the filling section 12 include gutta-percha and a filler having different specific gravities, and of course, the closed section 11 and the filling section 12 may include different material components. So, make the closed section 11 with fill the performance of section 12 and be different, the closed tube has higher hardness, is convenient for insert gutta-percha point 10 in the root canal cavity, fill section 12 has better thermoplasticity, also fill section 12 has lower fusing temperature to the unnecessary part of filling section 12 is sheared, thereby makes gutta-percha point 10 can exert the advantage of each section of closed section 11 with filling section 12 better, and then has promoted the whole result of use of gutta-percha point 10.

In an embodiment of the present invention, the closed section 11 comprises gutta-percha a1 parts and filler B1 parts, and the filled section 12 comprises gutta-percha a2 parts and filler B2 parts, wherein a1 is less than a2 and B1 is greater than B2. It will be appreciated that the closed section 11 contains a higher amount of filler than the filled section 12, and that the closed section 11 contains a lower amount of gutta percha than the filled section 12. The content of the filler is positively correlated with the hardness of the material, so that the high content of the filler can enable the closed section 11 to obtain higher hardness, but the thermoplastic property of the material can be seriously affected by adding a large amount of the filler, so that the filling section 12 can obtain better thermoplastic property by adopting the high content of the gutta percha, and the advantages of the closed section 11 and the filling section 12 can be furthest exerted by adopting a sectional design. Wherein, gutta-percha is also called natural gutta-percha, the main component of which is trans-1, 4-polyisoprene, and has better elasticity and thermoplasticity. The filler is an inorganic filler, the inorganic filler can specifically comprise zinc oxide, and the particle size range of the zinc oxide is 100 nm-400 nm. Of course, for better visualization, the filler also includes barium sulfate.

The gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises, by weight, gutta-percha A1 parts and a filling agent B1 parts, and the filling section 12 comprises the gutta-percha A2 parts and the filling agent B2 parts, wherein A1 is smaller than A2, and B1 is larger than B2. Thus, the gutta-percha point 10 of the present invention adopts a sectional design, so that the content of the filler contained in the closed section 11 is higher than the content of the filler contained in the filling section 12 (B1 is higher than B2), that is, the content of the filler is increased in the closed section 11, so that the closed section 11 has higher hardness, and the gutta-percha point 10 is easy to place in the root canal, and is easy to operate and seal; meanwhile, the content of the gutta-percha contained in the closed section 11 is lower than that contained in the filling section 12 (A1 is lower than A2), that is, the filling section 12 increases the content of the gutta-percha, and the melting temperature of the filling section 12 can be reduced due to the increase of the content of the gutta-percha, so that the thermoplasticity of the filling section 12 is improved, and the filling section 12 is easy to cut. Therefore, the closed section 11 and the filling section 12 of the gutta-percha point 10 can fully exert respective advantages, and the overall using effect of the gutta-percha point 10 is improved.

Referring to fig. 1, in an embodiment, the length of the closing section 11 is a, and the length of the filling section 12 is b, where a/b is greater than or equal to 0.2 and less than or equal to 0.4. In this way, the insertion of the closed segment 11 into the root canal is facilitated, while the entire length of the gutta-percha point 10 is made longer, facilitating the external manipulation of the doctor.

Optionally, the length of the closing section 11 is 2mm to 5mm, and the length of the filling section 12 is 10mm to 25 mm. In the present embodiment, the length of the closed section 11 in the axial direction of the gutta-percha point 10 may be specifically 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, 3.5mm, 3.7mm, 4mm, 4.5mm, 5mm, or the like. By making the length of the closed section 11 in the axial direction of the gutta-percha point 10 greater than or equal to 2mm and less than or equal to 5mm, the insertion of the closed section 11 into the root canal is facilitated. The length of the filling section 12 in the axial direction of the gutta percha point 10 may be, specifically, 10mm, 10.5mm, 11mm, 12mm, 13mm, 14mm, 15mm, 15.5mm, 16mm, 18mm, 19mm, 20mm, 22mm, 25mm, or the like. By making the length of the filling segment 12 along the axial direction of the gutta-percha point 10 greater than or equal to 10mm and less than or equal to 25mm, on one hand, the treatment requirement of the root canal is met, and on the other hand, the whole length of the gutta-percha point 10 is longer, thereby being convenient for the external operation of a doctor.

Without loss of generality, referring to fig. 1, the gutta-percha point 10 further comprises an operating section 13, the operating section 13 is connected with one end of the filling section 12 far away from the closing section 11, and the operating section 13 has two opposite flat surfaces. In this embodiment, the material of the operation section 13 may be the same as or different from the material of the closing section 11 and the filling section, and is not limited herein. Through making operation section 13 have two relative flats, then operation section 13 is whole to be the platykurtic setting, compares in the columniform structure, increases the area of contact of operation section 13 and tweezers, and then the doctor of being convenient for centre gripping this operation section 13. The transverse dimension of the operating section 13 may be greater than or equal to the outer diameter of the filling section 12, but of course, the transverse dimension of the operating section 13 may also be made smaller than the outer diameter of the filling section 12. In order to facilitate the holding of the handling section 13 by the physician, the handling section 13 may optionally have a transverse dimension which is larger than the outer diameter of the filling section 12. In this way, the area of the operation section 13 can be increased, and it is easier for the doctor to hold the operation section 13. In other embodiments, the operating section 13 may also be provided with color markings. Different gutta-percha points 10 are made to have different color marks so that the doctor can distinguish the specifications of the gutta-percha points 10 according to the color marks, thereby facilitating the classification and selection of the gutta-percha points 10 of different specifications.

The components and proportions of the sections of the gutta percha point 10 will now be described in detail.

In the embodiment of the present invention, the weight part B1 of the filler contained in the closing segment 11 is 50 to 80, and the weight part B2 of the filler contained in the filling segment 12 is 45 to 75. The weight portion A1 of the gutta-percha contained in the closed section 11 is 20-50, and the weight portion A2 of the gutta-percha contained in the filling section 12 is 25-55. The closed section 11 can be endowed with higher hardness by enabling the closed section 11 to contain a high proportion of filler and a low proportion of gutta-percha, and the filling section 12 contains a high proportion of gutta-percha and a low proportion of filler, so that the fusing temperature of the filling section 12 can be reduced, and the thermoplasticity of the filling section 12 is improved.

Optionally, the ratio of the parts by weight of the gutta percha contained in the filling segment 12 to the parts by weight of the gutta percha contained in the closing segment 11 is 1.25 to 2. Therefore, the filling section 12 has good thermoplasticity, and the filling section 12 has certain hardness, so that the use requirement of the filling section 12 is met. The ratio of the weight part of the filler contained in the closing section 11 to the weight part of the filler contained in the filling section 12 is 1.05 to 1.33. Therefore, the closed section 11 has certain thermoplasticity while ensuring that the closed section 11 has high hardness, and the use requirement of the closed section 11 is met.

In one embodiment, the filling section 12 further comprises 5 to 25 parts by weight of boron nitride. Boron nitride is a white flake material and has anisotropy. Tests show that after a small amount of boron nitride is added, the heat conductivity of the gutta-percha point 10 is greatly improved, and the filling section 12 is convenient to melt quickly. Moreover, the addition of a small amount of boron nitride does not affect the thermoplasticity of the filler segment 12, and thus the fusing temperature of the filler segment 12 is not increased. Optionally, the mass ratio of the filler to the boron nitride is 2 to 8.

In order to make the gutta percha point 10 have antibacterial property, in an embodiment, the filling section 12 further includes 2 to 10 parts by weight of an antibacterial agent. Specifically, the antibacterial agent is at least one of nano silver, nano titanium dioxide and a cationic surfactant. Wherein the cationic surfactant is cetyl pyridinium chloride. Considering that the gutta-percha point 10 can generate volume shrinkage after being cooled, and possibly cause residual microorganisms and bacteria in the oral cavity in the root canal to enter the root canal for permanent planting again to cause postoperative infection, the antibacterial agent is added into the closed section 11 to endow the closed section 11 with certain antibacterial property, so that the postoperative infection can be effectively prevented. It is worth mentioning that by adding inorganic matters such as nano silver or nano titanium dioxide only in the closed section 11, on one hand, a certain antibacterial property can be given to the closed section 11, on the other hand, the hardness of the closed section 11 can be improved, and meanwhile, the thermoplastic deterioration caused by adding the inorganic matters in the filling section 12 is avoided.

The technical solution of the present invention will be further explained with reference to the following specific examples.

Example 1:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha and 75 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 2:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 3:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha and 60 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 4:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 45 parts of gutta-percha and 55 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 5:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 55 parts of gutta-percha and 45 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 6:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 25 parts of gutta-percha and 75 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha and 75 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 7:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 25 parts of gutta-percha and 75 parts of a filling agent according to parts by weight, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 8:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 25 parts of gutta-percha and 75 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha and 60 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 9:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 25 parts of gutta-percha and 75 parts of a filling agent according to parts by weight, and the filling section 12 comprises 45 parts of gutta-percha and 55 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 10:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 25 parts of gutta-percha and 75 parts of a filling agent according to parts by weight, and the filling section 12 comprises 55 parts of gutta-percha and 45 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 11:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha and 75 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 12:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 13:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha and 60 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 14:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 45 parts of gutta-percha and 55 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 15:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 55 parts of gutta-percha and 45 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 16:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises, by weight, 40 parts of gutta-percha and 60 parts of a filling agent, and the filling section 12 comprises 25 parts of gutta-percha and 75 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 17:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises, by weight, 40 parts of gutta-percha and 60 parts of a filling agent, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of a filling agent. The filler includes zinc oxide and barium sulfate.

Example 18:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 40 parts of gutta-percha and 60 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha and 60 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 19:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 40 parts of gutta-percha and 60 parts of a filling agent according to parts by weight, and the filling section 12 comprises 45 parts of gutta-percha and 55 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 20:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 50 parts of gutta-percha and 50 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha and 75 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 21:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 50 parts of gutta-percha and 50 parts of a filling agent according to parts by weight, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 22:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 50 parts of gutta-percha and 50 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha and 60 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 23:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 50 parts of gutta-percha and 50 parts of a filling agent according to parts by weight, and the filling section 12 comprises 55 parts of gutta-percha and 45 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Example 24:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of the gutta-percha, 50 parts of the filling agent and 25 parts of boron nitride. The filler includes zinc oxide and barium sulfate.

Example 25:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent and 10 parts of boron nitride. The filler includes zinc oxide and barium sulfate.

Example 26:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 55 parts of the gutta-percha, 40 parts of the filling agent and 5 parts of boron nitride. The filler includes zinc oxide and barium sulfate.

Example 27:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 40 parts of gutta-percha, 50 parts of the filling agent and 10 parts of boron nitride. The filler includes zinc oxide and barium sulfate.

Example 28:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent in parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent, 10 parts of boron nitride and 2 parts of an antibacterial agent. The filler comprises zinc oxide and barium sulfate, and the antibacterial agent is nano silver or nano titanium dioxide.

Example 29:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent in parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent, 10 parts of boron nitride and 10 parts of an antibacterial agent in parts by weight. The filler comprises zinc oxide and barium sulfate, and the antibacterial agent is nano silver or nano titanium dioxide.

Example 30:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent in parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent, 10 parts of boron nitride and 2 parts of an antibacterial agent. The filler comprises zinc oxide and barium sulfate, and the antibacterial agent is cetyl pyridinium chloride.

Example 31:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent, 10 parts of boron nitride and 6 parts of an antibacterial agent. The filler comprises zinc oxide and barium sulfate, and the antibacterial agent is cetyl pyridinium chloride.

Example 32:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent in parts by weight, and the filling section 12 comprises 25 parts of gutta-percha, 65 parts of the filling agent, 10 parts of boron nitride and 10 parts of an antibacterial agent in parts by weight. The filler comprises zinc oxide and barium sulfate, and the antibacterial agent is cetyl pyridinium chloride.

Comparative example 1:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 20 parts of gutta-percha and 80 parts of a filling agent according to parts by weight, and the filling section 12 comprises 20 parts of gutta-percha and 80 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

Comparative example 2:

a gutta-percha point 10 comprises a closed section 11 and a filling section 12 connected with the closed section 11, wherein the closed section 11 comprises 30 parts of gutta-percha and 70 parts of a filling agent according to parts by weight, and the filling section 12 comprises 30 parts of gutta-percha and 70 parts of the filling agent. The filler includes zinc oxide and barium sulfate.

In order to study the performance of each stage of the gutta-percha point 10 according to the present invention, the performance tests were performed on the gutta-percha points 10 of the above-mentioned examples 1 to 30, and comparative examples 1 and 2, respectively, and the test results are shown in the following tables 1 and 2. Wherein, the hardness test is referred to the standard GB 1043-2008; shear viscosity test reference standard: ASTM D1238-98; the antibacterial performance test is referred to the standard GB/B31402-2015.

TABLE 1 results of performance testing of the filling segment

TABLE 2 closed segment Performance test results

As can be seen from tables 1 and 2, in the gutta-percha point 10 prepared in examples 1 to 23 of the present application, the hardness of the filling segment 12 is lower than that of the closing segment 11, and the shear viscosity of the closing segment 11 is higher than that of the filling segment 12, i.e., the fluidity of the closing segment 11 is inferior to that of the filling segment 12, i.e., the thermoplastic of the closing segment 11 is inferior to that of the filling segment 12. In addition, the filling segments 12 of the gutta percha points 10 prepared in examples 24 to 27 of this application have better heat conductive properties than the gutta percha points 10 prepared in examples 1 to 23. As can be seen from table 1, the filling segment 12 of the gutta-percha point 10 prepared in examples 24 to 27 of the present application is not affected in its thermoplasticity, compared to the gutta-percha point 10 prepared in examples 1 to 23, and it is demonstrated that the addition of a small amount of boron nitride does not affect the thermoplasticity of the filling segment 12 while improving the thermal conductivity of the filling segment 12. It can be seen from table 1 that the filler blocks 12 prepared in examples 30 to 32 of the present application, to which a small amount of an antibacterial agent, particularly a cationic surfactant, is added, can impart excellent antibacterial properties to the filler blocks 12 on the one hand, and can effectively improve the thermoplasticity of the filler blocks 12 on the other hand. Analysis shows that the addition of the cationic surfactant enables the filler and the boron nitride to be uniformly distributed in the gutta percha, so that good compatibilization effect is achieved, and the thermoplasticity of the filling segment 12 can be improved.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.