WO2009116650A1

WO2009116650A1 - Root canal filling system utilizing fiberscope

Info

Publication number: WO2009116650A1
Application number: PCT/JP2009/055535
Authority: WO
Inventors: 淳高橋
Original assignee: Takahashi Atsushi
Priority date: 2008-03-19
Filing date: 2009-03-19
Publication date: 2009-09-24
Also published as: JPWO2009116650A1

Abstract

Provided is a root canal treatment system wherein a root canal length can be measured without being influenced by the situation of a root canal at the time of root canal treatment by performing each step of the root canal treatment visually, and root canal filling can be achieved without forming a dead space up to the tip of a root even with a minimum quantity of root canal expansion. The root canal treatment system utilizing a multifunction fiber, wherein a root canal length is measured by confirming the position of an apical foramen by means of a tip view image scope function of a multifunction fiber being inserted into the root canal or an ultrasonic device, the multifunction fiber is provided with an overflow groove of light-curing resin root canal filling material and the shape at a portion being inserted into the root canal is adapted to the tapered shape of standard root canal expansion of a rotary cutting tool, and root canal filling is made by polymerizing a minimum quantity of light-curing resin root canal filling material remaining in the root canal by a light propagation diffusion function.

Description

[Name of invention determined by ISA based on Rule 37.2] Root canal filling system using fiberscope

The present invention relates to dental root canal treatment.

Previously, the goal of dental treatment was to sterilize by killing infected bacteria in the root canal, but once infected dentinal tubules cannot be completely sterilized, it is aseptic. Due to the fact that there is little correlation between rooting and the outcome of root canal treatment, the ultimate goal of dental root canal treatment is now to mechanically enlarge the root canal and close the root canal (especially apical closure) Evidence for root canal treatment is the pressurized root canal filling method, which blocks the inside of the tooth and the body. To achieve this objective, the root canal length measurement, root canal formation, and root canal filling steps must be performed accurately, but root canal length measurement takes into account the average root canal length. A combination of methods such as finger sensation, bleeding, pain, electrical resistance, X-ray examination, etc. are adopted, and root canal formation is performed according to the working length obtained by root canal length measurement, after standardized root canal formation In root canal filling, pressure root canal filling using a gutta percha point and a sealer is performed.
Japanese Patent Application 2001-352714

However, in the root canal length measurement method, which is the most important first step in root canal treatment, the finger sensation with the average root canal length as a reference value is poor in scientific basis that relies on the operator's personal experience and sense. This is a measurement method, and it is a very primitive method using bleeding from the root canal or pain. The risk of drilling a reamer or file, which is a root canal treatment device, into the tissue outside the root canal or by drilling into the tissue. In the case of adopting the electrical resistance value, the correct value is generally obtained under wet conditions, especially in the case where infected pulp, waste, etc. remain before the root canal cleaning is completed. It is difficult to ask. In addition, when X-rays are taken by inserting a reamer or a file into the root canal and performing supplementary measurements on the X-ray film, the apex on the two-dimensional film may be the actual root apex depending on the anatomical shape of the root canal. Since the probability of matching with the position of the apex remains at about 30% or less, it is difficult to perform accurate measurement. However, the first problem in the present invention is that it can be measured even under wet conditions, or even in a situation where infected pulp, wastes, etc. remain, visually confirming the apical hole that is an invisible region, The precise measurement of root canal length. In addition, as described above, filling and closing a pressurized root canal without using a gutta percha to a fine and bent root canal requires advanced technology and enormous work time, and a gutta percha master point with a circular cross section. When using sealers such as chemically polymerized resin and zinc oxide cement together with the gutta-percha accessory point, in order to pressurize the root canal filling material at the apex, the root of the root canal is considerably enlarged. Force the tube to form. If it is a straight root canal shape, if a reamer or file, which is a rotary cutting tool, is used for a bent root canal, a fan-shaped Zip is created in the enlarged part near the apex to prevent pressure root canal filling. Therefore, a strip with a thin root canal wall tends to occur in the central portion of the root canal, and there is a risk of poor prognosis due to drilling in that portion. The second problem is that the root canal filling depth can be adjusted without protruding or forming a dead sky from the apex while the amount of root canal enlargement is minimal. It is intended to provide a root canal treatment system that can be controlled freely.

The present invention prevents accidents by making each treatment step of root canal treatment that has been relied on skilled techniques because it is a treatment for the invisible region so far, thereby preventing accidents and improving the results of treatment. The first aspect of the present invention is designed to provide a safe and highly predictable root canal treatment system while avoiding radiation exposure of a patient. Appropriate elasticity and flexibility for complex roots, core-sheath structures, or single-structure bent root canals that have the function of propagating and emitting light emitted from the light source as well as the scope function to connect and display on the monitor This is a root canal treatment system using a multifunctional fiber composed of fibers having This fiber with moderate elasticity and flexibility can be inserted smoothly into the root apex along the inner wall of the root canal even if it is a bent root canal. It becomes possible to observe the state of the apex as an enlarged image by the scope function. Since the inside of the root canal can be clearly seen, it is possible to visually grasp the situation where the fiber tip has reached the apical hole. It is possible to accurately measure the root canal length by directly reading the measure value written on the rubber stopper, marking or fiber at a position corresponding to the arbitrarily set reference point of the inner crown.

In addition, the direction of the tip can be freely changed by moving or rotating the fiber in the root canal by operating the controller of the multipurpose fiber at hand or the intraoral holding device, so that the diameter of the apical canal from the root canal opening is about 0.1 The fiber tip entrance part protrudes from a hole of about 0.2 mm, and it is possible to observe the tissue around the apical foramen without destroying the apical hole that is the most narrowed part.
Using this observation function in the root canal, after root canal cleaning is completed, if the root canal is filled with a photo-curing resin, it is adjusted to a color tone or fluorescent color that can be visually recognized on the inner wall of the root canal according to each step of root canal filling. After applying the light-curing resin dentin adhesive, the application state is confirmed with a fiberscope of a multifunctional fiber, and then the filling state when a highly transparent light-curing resin root canal filling material is poured, or death due to entrainment of bubbles It is possible to visually confirm the presence or absence of a cavity. Needless to say, light source illumination with a wavelength different from the polymerization wavelength of each material is adopted so that the photocuring resin dentin adhesive and the photocuring resin root canal filling material do not polymerize at the confirmation operation stage. Yes. Moreover, application | coating after photocuring resin dentin adhesive application | coating and filling of photocuring resin root canal filling material can also be performed using the applicator tube of another path | route (channel). Furthermore, this applicator tube is also applied to root canal washing, suction drying and cleaning operations.

After visually confirming that the photo-curing resin root canal filling material is tightly filled in this way, the light is propagated and diffused from the light source with the optical fiber of another path (channel) arranged in parallel to the fiber, and the fiber By making the entire circumference emit light, the photocurable resin dentin adhesive and the photocurable resin root canal filling material are photopolymerized, and the root apex is closed by chemical bonding, thereby completing the root canal filling. After filling the root canal, the fiber can be slept into the root canal, or can be pulled out of the photocured resin root canal filling material by applying a separating material to the fiber.

The root canal treatment system using the fiber scope of the multifunctional fiber allows the operation of each of the root canal treatments, which are invisible areas, to be confirmed with clear vision, so that the treatment is highly predictable. Things will be possible.

The ultrasonic endoscope of the second invention is an endoscope in which an ultrasonic (echo) device is literally attached to the tip of the fiber, and is inserted into the root canal to ultrasonically inspect the root canal and the tooth supporting tissue. It is. Unlike echography from the external surface of the root of the root, the dental root canal status can be observed without being obstructed by the hard tissue, and the drug solution, infected pulp, and waste products remain in the root canal. Even so, it is possible to perform high-resolution ultrasonic observations with a relatively high frequency ultrasonic wave of 5 to 30 MHz from the vicinity of the observation purpose, without interfering with capturing the echo and creating an image. It is. The first invention is a thing that ensures vision with a fiber scope of a multifunctional fiber, so if infected dental pulp, waste, etc. remain in the root canal, it becomes a visual obstacle and it is difficult to secure a visual field. Ultrasonic waves are suitable for measuring the initial working length because they display an image by echoes of tissue.

In addition, when apical lesions exist, it is possible to grasp the spread of the lesions by performing an echo inspection by slightly protruding the tip of the ultrasonic device out of the apical holes.

In the third invention, when inserted into the multifunctional fiber root canal of the first and second inventions, the insertion depth is finely adjusted by manual pressure in the oral cavity where space is limited, and the working length is further determined. It is difficult to maintain and fix multifunctional fibers. However, in the present invention, the multifunctional fiber in which the tooth to be treated in the oral cavity or the tooth in the same dentition is inserted directly into the root canal indirectly and directly into the root canal is maintained, and the insertion amount thereof By providing an adjustment mechanism for adjusting the insertion depth, the insertion depth can be finely adjusted according to the adjustment pitch. This adjustment mechanism can be fine-adjusted after inserting and holding the multifunctional fiber to a predetermined position by manual pressure with the anatomical average root canal length as a guide, so that speedy work is possible. . Furthermore, it is possible to obtain the distance from an arbitrary reference point set on the tooth to be treated to the apical canal = accurate root canal length by a scale provided to the multifunctional fiber or the adjusting mechanism. In addition to these mechanisms, it is possible to rotate the multifunctional fiber tip axis at any insertion depth, so if you want to check the entire circumference of the root canal wall to find the root canal side branch, or extremely When confirming the forward view of the insertion direction of the fiber tip of the root canal that is bent in the direction, the incident direction is pressed against the outer side wall in the root canal due to the repulsive force of the fiber itself, so the imaging direction is directed toward the outer wall and the field of view is obstructed. It will be. In such a case, since a suitable pre-angle is given to the tip of the multipurpose fiber of the present invention, it is possible to obtain a side view by freely changing the viewing direction by rotating the fiber. Depending on the rotation adjustment, it is possible to keep the field of view in the center of the root canal, so it is possible to always obtain an appropriate field of view, and it is also possible to change the field of view on the side wall, so It is also possible to discover root canal side branches that are difficult to observe and to observe the state of infected dentin. In addition, in order to prevent the pre-angle imparted to the multifunctional fiber from interfering with the insertion into the root canal, a shape memory resin having appropriate elasticity and flexibility that changes its shape due to temperature changes, etc. It is preferable to use it.

In order to perform root canal filling with a high degree of predictability with minimal root canal enlargement for the root canal length obtained in this way, the shape of the root canal enlargement tool and the taper shape of the insertion part in the multifunctional fiber root canal This is a root canal treatment system using a multifunctional fiber having a similar shape and further provided with an overflow groove of a photocurable resin dentin adhesive and a photocurable resin root canal filling material on the surface of the multifunctional fiber. The goal of root canal treatment is to allow various root canal filling materials to reach the apex, press the root canal filling material inserted into the root canal from the horizontal or vertical direction, close the apical hole and close it tightly. The purpose is to block traffic inside and inside the teeth. However, in order to fill a pressure root canal with a root apex of about 0.1 mm existing at the tip of a natural root canal that is 16 mm or more on average from the root canal, first the root canal side of the apical canal In order to prevent the root canal filling material from projecting or leaking out from the apical hole, it is necessary to accurately form the apical sheet in the immediate vicinity of the apical hole. For this reason, in general, when root canal filling is performed, root canal enlargement of # 40 or more (about 1 mm at the standard base of a dental reamer) is required. The root canal is expanded so that the expanded root canal shape is as straight as possible so that no zip or strip is formed. This expansion amount enlarges the anatomical root canal shape of natural teeth from 3 times to 14 times, and is not preferable in terms of functional anatomy considering the burden of occlusal pressure after restoration. However, in the present invention, as in the first invention, the root apex is closed by the photopolymerization resin without pressurizing, and therefore a multifunctional fiber having moderate elasticity is necessary even for a bent root canal. It is possible to insert the root apex with a minimum amount of root canal expansion and complete the root canal filling. However, if the shape of a root canal that can be inserted into a general metal dental root canal enlargement device, it is a flexible and waisty multifunctional fiber that can reach the apex in the same way as a metal file. In addition to the fact that the shape of the root canal enlargement device and the taper shape of the multifunctional fiber root canal insertion portion are standardized, the fourth invention uses the surface of the multifunctional fiber. Are provided with overflow grooves for the photocurable resin dentin adhesive and the photocurable resin root canal filling material, so that the excess photocured resin dentin adhesive and the photocurable resin root canal filling material pass through the overflow groove to obtain a root canal. Light curing resin dentin adhesive and light curing resin root canal filling material discharged from the mouth and remaining in the root canal can be reduced as much as possible, minimizing microleakage due to polymerization shrinkage of the resin. High predictability with minimal root canal expansion while remaining It is possible to perform root canal filling.

In addition, in the fourth invention, there is a concern that the photocurable resin root canal filler leaks out from the apex due to the thickness of the root canal and the viscosity of the photocurable resin root canal filler. On the other hand, the fifth invention is compared with the diameter of the multifunctional fiber at the tip of the multifunctional fiber in order to prevent the photocurable resin root canal filler from leaking out of the root canal. Thus, a multi-functional fiber in which a stopper shape having a larger outer shape and an applicator tube (tube) discharge port installed in the multi-function fiber on the root canal opening side closest to the stopper shape is installed.

In this system, since the root canal is filled with a photopolymerization resin, it is necessary to consider the construction of an abutment such as when there are few remaining teeth. In the first place, abutment construction is a treatment range of root canal treatment. Therefore, in the sixth invention, carbon fiber, glass fiber, resin fiber or metal mesh tube that does not impair the elasticity and flexibility of the multifunctional fiber is used. The mesh together with the photopolymerization resin for core construction filled in the root canal and the substantial defect part when the abutment is built by covering the multifunctional fiber and emitting the multifunctional fiber after filling the root canal or when filling the root canal This is a root canal treatment system in which a core-building photopolymerization resin impregnated in a tube fiber is polymerized and the light-emitting fiber is formed into a fiber-reinforced plastic post.
Fibers with special shapes in the root canal insertion part are used as multi-function fibers to grasp the root canal length and complete the root canal enlargement. The root canal filling may be completed by propagating and diffusing, photo-polymerizing the photo-curing resin dentin adhesive and the photo-curing resin root canal filling material by blocking the root of the root by chemical bonding.

According to the above means, the following actions can be obtained.

According to the multipurpose fiber according to claims 1 to 5 of the present invention, the state of the root canal between the root canal opening and the apical canal is clarified by the distal end visual field image scope function or the ultrasonic device. Since it can be visually confirmed, it is possible to accurately measure the root canal length by visually confirming the arrival of the apex of the multipurpose fiber. Sequentially, in each step, it is possible to visually check the status of the root canal after cleaning the root canal, the application status of the photocurable resin dentin adhesive root canal, and the filling status of the photocurable resin root canal filling material. Unlike blind techniques for invisible areas up to, it is possible to perform root canal treatment with extremely high certainty. In addition, a photocurable resin root canal filling material that remains in the root canal by adapting the rough shape of the insertion portion in the multi-function fiber root canal to the tapered shape of the root canal enlargement of the rotating cutting tool standard and providing an overflow groove Since the amount is minimal, the apical canal can be tightly closed with minimal root canal expansion while minimizing microleakage due to polymerization shrinkage of the resin. Furthermore, by installing the stopper shape with a larger outer shape at the tip of the multifunctional fiber compared to the diameter of the multifunctional fiber, and installing it in the multifunctional fiber on the root canal side closest to the stopper shape, Since the root canal is physically closed by the stopper shape, it is possible to prevent the light-curing resin root canal filling material discharged from the applicator tube (tube) from leaking out from the apical root canal.

Further, in order to consider abutment construction which is a treatment range of root canal treatment, if the sixth invention is used, carbon fiber, glass fiber, resin fiber or the like that does not impair the elasticity and flexibility of the multifunctional fiber. Multifunctional fiber is covered with a metal mesh tube, and after filling the root canal or in the mesh tube fiber together with the photopolymerization resin for core construction that fills the root canal and the substantial defect part when the abutment is built when filling the root canal The impregnated photopolymerization resin for core construction can be polymerized by emitting light from the multifunctional fiber, so that the light-emitting fiber can be made into a fiber reinforced plastic post. Can be improved.
These highly safe root canal filling systems can have an excellent effect of enabling highly predictive root canal treatment.

Tooth sectional view showing a situation in which the inside of the root canal is observed using the multifunctional fiber of the present invention Holding device part mechanism sectional view and tooth sectional view showing the situation of observing the inside of the root canal using the multifunctional fiber of the present invention A cross-sectional view of a tooth showing a situation where a photocuring resin dentin adhesive is applied at a paper point through a holding device mechanism Holding device part mechanism sectional view and tooth sectional view showing the situation of observing the application state of the photo-curing resin dentin adhesive using the lifting mechanism of the multifunctional fiber of the present invention Sectional view and tooth cross-sectional view of holding device part mechanism showing state of observing filling state of photo-curing resin root canal filling material using raising / lowering turning mechanism of multifunctional fiber of the present invention Using the multifunctional fiber of the present invention, the photocurable resin root canal filling material and the photocurable resin dentin adhesive are polymerized, and after closing the root canal, the multifunctional fiber is cut to complete the root canal filling. Tooth sectional view Schematic diagram showing the implementation status of mandibular first molar root canal treatment using the multifunctional fiber of the present invention Schematic diagram showing root canal filling steps using a standardized root canal reamer and a multifunctional fiber of the same standard with a leakage groove (only the tip is shown) The apical hole is closed by the apical stopper attached to the tip of the multipurpose fiber, and the photo-curing resin is discharged from the apical portion without dead space from the discharge port connected to the applicator tube provided in the apical stopper. The situation where the apical stopper is adhered to the apical part by emitting light and the apical hole is completely closed, and light is applied so as to cover the multipurpose fiber simultaneously with the root canal filling treatment or after the root canal filling is completed. Place a mesh tube impregnated with curable resin, fill the medullary cavity and the abutment construction part with light curable resin, emit light transmissive master point, and build abutment with fiber reinforced plastic post reinforced with fiber reinforced resin Tooth sectional view showing the situation to be implemented Enlarged view showing the multifunctional fiber and the apex stopper that can be detachably installed on the multifunctional fiber

Explanation of symbols

1. Multipurpose fiber 2. Lifting screw 3. Intraoral holding device 4. Lifting dial 5. Friction trap 6. Arm 7. Enamel 8. Cement. 9. Dentin 10. Curved part 11. Swivel roller 12. Paper point. 13. Master point depth scale 14, root apex 15, photopolymerization resin dentin adhesive 16, photopolymerization resin root canal filling material 17, holding device clamp 18, controller (imaging device and light source)
19, swivel dial 20, skull 21, mandibular molar (root canal treatment tooth) 22, mandible 23, maxilla 24, leak groove 25, root canal reamer 26, root canal 27, mesh tube 28, apical stopper 29, discharge port 30, applicator tube 31, light emitting unit 32, scope fiber

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 8 are examples of embodiments for carrying out the invention. In the drawings, the same reference numerals as those in the figure denote the same parts, and the configuration of the multipurpose fiber of the present invention is basically the same. However, the feature of the illustrated example is that the root canal length can be accurately measured as shown in FIG. 1 by enabling each step of root canal treatment to be performed under clear vision. As shown in FIG. 8, it is possible to confirm the application state of the photopolymerizable dentin adhesive, and to confirm the filling state of the photopolymerized resin root canal filling material as shown in FIG. The amount of the filling resin is reduced as much as possible by providing a leakage groove on the surface of the light diffusion fiber replaced with the fiber or the multipurpose fiber.

Next, the treatment procedure will be described according to the illustrated example. In general, when the source of infection exceeds the protective immunity against epithelial barrier infection and the invasion source breaks through this barrier and bacteria enter the living body, the acquired immunity corresponding to the infectious source that broke through the natural immunity or innate immunity is the antibody or complement. In addition to humoral immunity by blood proteins such as the body, it is carried by cellular immunity by cells such as lymphocytes. Therefore, it is impossible to exert immunity against healthy tissue from which infected or necrotic pulp has been removed, and bacteria in the root canal and dentin without blood circulation. Therefore, the concept of dental root canal treatment is to clean and remove the infected pulp in the infected root canal caused by bacterial infection of the dental pulp in the root canal, and to remove the hollow root canal from the root canal in the cementitious coating area. By closing at the apical canal, which is a stenotic traffic site, the outside of the body (inside the root canal and oral cavity) and the inside of the body (in vivo) are separated at the root canal and renewed like epithelial barrier infection defense immunity in the body. It protects the living body by creating and maintaining a barrier by mechanically blocking infection.

However, as mentioned above, since the root canal cannot be visualized macroscopically from the root canal to the root canal hole, root canal cleaning and disinfection and root canal leading to root canal filling, which is a terminal treatment, are possible. All the steps of enlargement and root canal formation will be performed by blind operation, and even a skilled dentist will have a postoperative evaluation other than judging long-term prognosis, and mechanical closure treatment in the invisible region Therefore, it was difficult to judge the predictability immediately after the completion of treatment. In the present invention, the root canal treatment in the invisible region is performed under a bright field. As shown in FIG. 1, the multipurpose fiber 1 having a scope function for projecting the field of view of the distal end is provided in the oral cavity holding device 2. It is a thing to observe the inside of the root canal while maintaining the teeth. As shown in FIG. 2, the multipurpose fiber 1 is integrally moved when the elevating dial 4 is rotated, and the elevating screw 2 moves up and down (E direction), and the multipurpose fiber 1 having appropriate elasticity and flexibility is rooted. Insertion can be produced in the root canal along the tube wall. In addition, since the multipurpose fiber 1 is pre-bended in the bent portion 10 near the tip according to the bent shape of the root canal, the swivel dial 19 of the controller 18 is operated as shown in FIG. Thus, as shown in FIG. 2, the multipurpose fiber 1 rotates together with the freely rotating roller 11 in the lifting screw 2, so that it can turn like E` in the root canal to freely change the tip field of view. It becomes possible to observe every corner of the root canal. Further, when the elevating dial 4 is rotated and the multipurpose fiber 1 is advanced in the apical direction, the root canal can be clearly detected. At this point, the tip of the multi-purpose fiber is carefully stopped by root canal improvement, and the root canal length can be visually confirmed by measuring the value of the master point arrival depth scale 13 so that the working length can be determined deterministically. Become. Further, in the system of the present invention, the oral cavity holding device 3 is directly fixed to the tooth by the holding device clamp 17 through the arm 7 and used as a reference point during a series of treatment actions. It becomes possible to give sex. With the root canal length obtained in this way, the lifting dial 4 is loosened, the lifting screw 2 integrated with the multipurpose fiber 1 is removed, and soft tissue such as infected pulp in the root canal is cleaned and removed with a minimum amount of root canal enlargement. As shown in FIG. 3, the photopolymerization dentin adhesive 15 is applied to the root canal using the paper point 5. As shown in FIG. 4, the photopolymerization dentin adhesive 15 is applied to the root canal again, and the multipurpose fiber 1 is returned to the root canal again and observed up to the apex. In this case, as a light source for securing a visual field, it is natural to use light having a wavelength that does not cause the photopolymerization dentin adhesive 15 to react, but the photopolymerization dentin adhesive 15 itself has a fluorescent color. Visibility is further improved by coloring such as. Following the pretreatment, as shown in FIG. 5, the multi-purpose fiber 1 is positioned in the immediate vicinity of the apical canal according to the acquired root canal length, and the photopolymerization root canal filling material 16 is generated from the tip of the fiber so that no bubbles are generated. After confirming whether the root canal is tightly filled without formation of dead space due to, the multi-purpose fiber 1 emits light, and the photopolymerization dentin adhesive 15 and the photopolymerization root canal filling material 16 are polymerized. The root canal is occluded. When a material having dentin adhesive force is used for the photopolymerization root canal filling material 16, the application of the photopolymerization dentin adhesive 15 and the photopolymerization root canal filling material 16 filling step are used separately. There is no need.
After the root canal filling is completed in this way, the multipurpose fiber is cut at the root canal opening 26, and as shown in FIG. 6, the minimum root canal enlargement based on the accurate root canal length measurement is performed. A highly predictable root canal filling state in which the photopolymerization root canal filling material 16 is bonded to the dentin in the root canal from the root canal opening 26 to the apical hole 14 without pressure by the photopolymerization dentin adhesive 15. It becomes possible to acquire.

In addition, the root canal filling system of the present invention falls within the category of the single point technique when the multipurpose fiber is replaced with the conventional master point, but the root canal has an anatomically thick shape like the anterior teeth. When the root canal filling from FIG. 1 to FIG. 6 is performed, the volume of the photopolymerized resin root canal filling material is naturally large. In consideration of the fact that polymerization shrinkage basically occurs regardless of the performance of the resin, it is desirable that the volume of the polymerization resin be as small as possible. Therefore, for a relatively thick root canal, as shown in FIG. 8, a taper-shaped root canal reamer 25 having a tapered shape similar to a standardized taper shape of the insertion portion of the multifunctional fiber 1 is used. Then, expand the root canal toward the apex as in C. When the photo-curing resin root canal filling material 16 is applied to the surface of the multi-function fiber 1 that has been similarly standardized and inserted in the apical direction, the root canal thus formed is provided on the surface of the multi-function fiber. Since the overflow groove of the photocuring resin dentin adhesive and the photocuring resin root canal filling material 16 is provided along the overflow groove 24, the surplus photocuring resin dentin adhesive and the photocuring resin root canal filling material are not rooted. It becomes possible to reduce as much as possible the photocurable resin dentin adhesive and the photocurable resin root canal filling material that are discharged from the tube port and remain in the root canal. Accordingly, it is possible to perform root canal filling with high predictability by minimizing root canal expansion while minimizing microleakage due to polymerization shrinkage of the resin. Also, depending on the viscosity of the photopolymerization resin, if there is a concern about the outflow of the resin from the apical hole even if the eighth invention is used, the apical stopper 28 is attached to the tip of the multipurpose fiber 1 as shown in FIG. In this state, if the polymer resin dentin adhesive 15 is discharged from the discharge port 29 by using the applicator tube 30 with the apical hole as shown in b2, the apical portion in the direction of the root canal as shown in b4. The photopolymerization resin root canal filling material fills the foundation without dying. At this time, if arranged around the multipurpose fiber of the mesh tube 27 as shown in b3, the mesh tube 27 impregnated with the photopolymerization resin is also photocured at the same time. You can complete the build-up procedure.

The dental root canal treatment system to which the light diffusing resin fiber, the light curable resin, and the light curable resin dentin adhesive according to the present invention are applied is not limited to the above-mentioned illustrated example, but the multipurpose fiber 1 or the overflow groove The shape and number of 24 is changed according to the tooth type and the anatomical form of the root canal, and an imaging device, a light source, an intraoral holding device, a turning device, It goes without saying that various modifications can be made to the mechanical structure of the lifting device without departing from the scope of the present invention.

In addition to the above-mentioned dental root canal treatment, this extremely thin multi-function fiber fiber scrub can be inserted into the periodontal pocket in the oral cavity to observe the root surface and insert into the fistula. Thus, it can be applied to observation and diagnosis of an inflammatory state of a tissue. All of these diagnostic elements are not things that require complete image information, and it is also assumed that monochrome image or simple image information such as brightness and color tone will contribute to simplification of diagnostic elements. It is a thing. However, the following uses can be considered as applications in the general medical field besides the dental field. In the past, when making a tissue diagnosis, in order to minimize damage to the affected area, the lesion was punctured with a thin needle and the contents were aspirated and collected for clinical examination. In general, it cannot be denied that this method requires a certain amount of time to make a definitive diagnosis in order to examine a collected sample in a laboratory. However, a definitive diagnosis can be performed in a short time by inserting the very thin multifunctional fiber of the present invention into an affected lesion and transmitting an enlarged image to a histopathology laboratory. In this way, if a very thin multi-functional fiber of about 0, 1 mm is used, even in the clinical practice of cardiac catheter surgery, an examination that has been performed by a fictitious doctor using a two-dimensional contrast monitor until now, Since surgery can be inserted with direct visualization of the inside of the blood vessel, shortening of the operation time contributes to improvement in reliability and safety.

Claims

A system for dental root canal treatment,
A function of propagating and diffusing light such as visible light or ultraviolet light emitted from a light source around the tip,
Scope function to transmit the visual field image at the tip and display it on the monitor by connecting to the eyepiece or imaging device,
A measure to measure the length of insertion in the root canal
The
A composite structure having a suitable elasticity and flexibility, a core-sheath structure or a single fiber,
By clearly checking the apical foramen,
Measure root canal length,
Check the application state of the photocurable resin dentin adhesive applied to the inner wall of the root canal,
Check the clogged state of the light curing resin root canal filling material poured,
Photopolymerizing the photocurable resin dentin adhesive and the photocurable resin root canal filling material by the function of propagating and diffusing light such as visible light or ultraviolet light emitted from a light source,
A root canal treatment system using a multifunctional fiber that closes the apical foramen.
An ultrasonic device is installed at the end of the multifunctional fiber of claim 1 to perform ultrasonic inspection from within the root canal, and without being affected by infected pulp and residual waste under wet conditions, especially before root canal cleaning is completed. A root canal treatment system that uses a multi-functional fiber to display the root canal shape by ultrasonic observation with high resolution from near the observation purpose, and to measure the measured value of the anatomical shape.
A fixing mechanism for maintaining the multifunctional fiber of claim 1 and claim 2 indirectly and directly on a tooth;
An adjustment mechanism for holding the multifunctional fiber inserted into the root canal at an arbitrary position and finely adjusting the amount of the multifunctional fiber inserted into the root canal;
A mechanism for rotating the fiber tip shaft while maintaining the insertion amount;
A measurement mechanism for displaying the insertion length of the multifunctional fiber root canal;
A root canal treatment system using a multi-functional fiber.
The shape of the portion inserted into the root canal of the multifunctional fiber according to claim 1,
A shape that conforms to the tapered shape of standard root canal enlargement with a rotary cutting instrument,
A surface of the multifunctional fiber is provided with an overflow groove of a photocurable resin dentin adhesive and a photocurable resin root canal filling material,
A root canal treatment system using a multifunctional fiber in which the photocurable resin dentin adhesive and the photocurable resin root canal filling material remaining in the root canal are reduced as much as possible.
A stopper shape having a larger outer shape than the diameter of the multifunction fiber at the tip end portion of the multifunction fiber according to claim 1, and installed in the multifunction fiber on the root canal opening side closest to the stopper shape A root canal treatment system using a multifunctional fiber, characterized by installing an applicator tube outlet.
The multi-functional fiber according to claim 1 is coated with a carbon fiber, glass fiber, resin fiber or metal mesh tube that does not impair the elasticity and flexibility of the multi-function fiber, and the multi-function fiber emits light, so that the abutment is built. The core-building photopolymerization resin impregnated in the mesh tube fiber is polymerized together with the core-building photopolymerization resin filled in the root canal and the substantial defect portion, and the light emitting fiber or master point becomes a fiber reinforced plastic post. Root canal treatment system.