KR20010114205A - Method and apparatus for dental treatment using high pressure liquid jet - Google Patents

Abstract

The present invention relates to a dental procedure method and apparatus using a dental hydraulic jet tool (35) with an extended cannula (34). Cannula 34 is connected to a high pressure liquid source to deliver high pressure and high velocity jets. For the root canal procedure, the cannula 34 is guided through the opening 32 in the crown 11 of the tooth 10 and the hydraulic jet tool 35 has dimensions, nerves and blood vessels in the inner chamber 26. Induced into the tissue. Fluid jet 36 may include medical saline, disinfectant, antibiotic or abrasive solution. All soft tissue in the tooth 10 is cut, excised, emulsified and aspirated from the tooth 10. The time required for ablation, emulsification and aspiration of all soft tissues in a typical molar is about 10 to 240 seconds. The inner chamber 26 of the tooth 20 is completely aspirated and visually confirmed for complete removal of all soft tissue and then filled with appropriate filler. The opening 32 in the upper part of the tooth 10 is filled or provided with a prosthetic crown. Fluid jet 36 may include a pulsed jet formed by a steady stream jet emitted from a pulse amplification device or orifice in handpiece 33 of dental hydraulic jet tool 35. Fluid jet 36 may be used for tooth decay, plaque, tartar removal, and soft tissue surgery.

Description

TECHNICAL AND METHOD AND APPARATUS FOR DENTAL PRESSURE LIQUID JET}

Performing most of the treatment using mechanical techniques is known in the art and as a common dental practice. For example, in endodontics, where a large number of root canal procedures are involved, a diseased tooth is first diagnosed, then penetrates through the crown of the tooth and causes a pulp chamber of the tooth. The opening is drilled into the chamber. After the teeth are isolated and the field is sterilized, the dimensions, which consist primarily of blood-rich tissue, nerve fibers and necrotic components, are aspirated. In the pulp chamber remains primary nerve fibers and blood vessels supporting the teeth. This tissue extends through the narrow channel from the microscopic opening in the apex of the root of the tooth and cannot be removed by suction alone.

In general, a file is then inserted into a narrow channel to displace and abrade nerve and vascular tissue. Increasingly large files are inserted and all soft tissue in the narrow channel is removed. After cleaning and preparation, the pulp chamber and root channel are filled with sterile solid material, and the perforated opening is filled with standard gold, silver or other dental filling preparations.

Since this general procedure is labor intensive, it is a costly factor in time as well as the skills and experience of the dentist. Moreover, such a procedure may be painful and sufficient local anesthetic should be injected to allow complete loss of sensation of the tooth area for the relatively long time needed for the procedure.

Complications that are known to arise from root canal procedures include infections resulting from incomplete removal of diseased tissue in the root canal and pulp chambers or the influx of other infectious bacteria into the space during root canal procedures. have. The dentist may also perforate the teeth irrespective of intention, for example, by advancing the file device through the apical opening of the root base, and the apical opening thus formed may cause recurrent infection and inflammation. It can also provide a vector for inflammation. Often, prior to this complication, drug treatments involving strong antibiotics are prescribed after the root canal procedure. Other complications include broken devices left in the tooth, or fractures of the root or body of the tooth.

Recent innovations in this dental procedure include the use of laser beams delivered by optical fibers into the pulp chamber and root channel. High power optical energy evaporates pulp and nerve tissue and also performs a unique function of sterilization. However, the product of tissue combustion may contaminate the interior of the pulp chamber and root channel, and the laser pulse may not contact all tissue in the narrow root channel, resulting in very unsatisfactory results. To avoid this result, there is a tendency to apply excessive laser energy, which may overheat teeth and surrounding tissues and cause necrosis. In addition, laser energy impinging on already existing metal charges can cause dangerous reflected beams and unexpected damage.

As another example, in periodontal practice, which generally involves gingivectomy procedures, the gingiva is usually resected using a scalpel, scaling and root smoothing. Root planing is performed with dedicated steel tools. Such procedures and most other dental procedures are performed with mechanical drills, burrs, and cutting wheels.

Innovations such as ultrasound-driven scaling instruments and high-power lasers for removing cavities have not substantially changed the dentist's dependence on the same machine tools that have been used for nearly a century. All machine tools generate high levels of vibration and sound that are guided directly through the bones to the patient's auditory organs, causing patient comfort problems. In addition, ultrasonic tools as well as mechanical tools generate significant amounts of heat in very localized areas, causing direct pain irritation. Water spray devices are provided to remove this heat, but may not be effective at a local point source of heat. In this regard, the heat generated by the dental laser may pose the biggest problem.

Clearly, the prior art shows unmet needs for an improved dental device capable of performing a wide range of dental treatment procedures without generating heat, noise and vibration when the dentist operates on the patient's teeth.

The present invention relates to an apparatus for performing a dental procedure, and more particularly to an apparatus for performing a dental procedure using a high pressure liquid jet.

1 is a front cross-sectional view of a typical human tooth before pulp resection / root canal treatment of the present invention.

FIG. 2 is a front sectional view as in FIG. 1 illustrating the step of forming an opening through the tooth top into the pulp chamber. FIG.

3 is a front sectional view as in FIGS. 1 and 2 showing a cannula of a dental hydraulic jet tool extending through the upper opening of the tooth and operative to release a high pressure and high velocity jet;

FIG. 4 is a front sectional view as in FIGS. 1-3 showing soft tissue in one root channel and part of the pulp chamber being emulsified and aspirated.

FIG. 5 is a front sectional view as in FIGS. 1-4 showing the root channel and the soft tissue in all pulp chambers being emulsified and aspirated.

6 is a front sectional view as in FIGS. 1-5 showing the pulp chamber filled with filler and the root channel and the top opening filled after completion of the procedure.

7 is a block diagram illustrating the functionality of an electric drive system for operating the high pressure jet dental device of the present invention.

Figure 8 is a block diagram showing the function of an air driven system for operating the high pressure jet dental device of the present invention.

9 is a front sectional view of one embodiment of the fluid reservoir shown in FIGS. 7 and 8.

FIG. 10 is a front sectional view of yet another embodiment of the fluid reservoir shown in FIGS. 7 and 8. FIG.

11 is a front sectional view of a further embodiment of the fluid reservoir shown in FIGS. 7 and 8.

12 is a front sectional view of a further embodiment of the fluid reservoir shown in FIGS. 7 and 8.

Fig. 13 is a block diagram showing the function of a system for generating purified water used in the fluid reservoir of the present invention.

Figure 14 is a side cross-sectional view of a handpiece portion of the high pressure jet dental device of the present invention.

15A-15D are side cross-sectional views of another embodiment of output tips of the dental device shown in FIG.

16A is an enlarged end view of a further embodiment of the output end of the dental device shown in FIG.

Fig. 16B is a partially cutaway sectional view of the output terminal along line 16b-16b in Fig. 16A.

The present invention generally includes dental treatment devices and methods that overcome the problems associated with current mechanical and dental techniques and devices. In one aspect, the present invention provides a technique for removing soft tissue from inside a tooth of a human or animal to remove infectious and inflamed necrotic tissue, and to allow teeth and periodontal tissue to return to a healthy state. Include. Another characteristic aspect of the present invention is to instead employ a high pressure jet of water or other liquid that is directed to the soft tissue in the tooth to ablate, emulsify and aspirate the soft tissue, thereby eliminating the need for pile and other mechanical abrasive displacement tools. Soft tissue may include pulp, nerve tissue, and blood vessels extending from each jaw bone through each root end into the root chamber and into the pulp chamber of the tooth.

The present invention provides a dental hydraulic jet tool having a handpiece and a cannula extending therefrom. The cannula is connected to a source of high pressure water or other liquid and includes a terminal orifice that delivers high pressure and high speed jets. The pressure range of the high pressure source is approximately 3.45 to 413 MPa (500 to 60,000 psi) and the jet orifice is approximately 10 to 800 μm in diameter. The cannula may provide a suction force that removes fluid from the jet as well as tissue, or the suction force may be provided by a second cannula connected to a vacuum suction unit. Exemplary devices are described in US Pat. No. 5,562,692, co-assigned with the present invention.

To begin the method of the present invention, a tooth that has been diagnosed as having a disease need for pulpctomy / root canal surgery is opened, i. do. Next, the tooth is isolated using a dental dam or similar protective shield.

The cannula of the hydraulic jet tool is then guided through the newly formed aperture in the crown of the tooth, and the jet of liquid is directed to the pulp, nerve and vascular tissue in the inner chamber of the tooth. The fluid may comprise a medical saline solution, and / or a disinfectant solution, and / or an antibiotic solution, and / or an abrasive solution. In the pressure range and jet diameter formed by the hydraulic jet tool, all the soft tissue in the tooth is cut, excised, emulsified and aspirated from the tooth. The suction force may be provided by a hydraulic jet tool or a cannula of a standard dental suction device.

Another characteristic aspect of the method according to the invention is that the hydraulic jet easily removes all soft tissue in the tooth, but its performance is limited in cutting or eroding hard lime dental tissue. Similarly, the speed of the hydraulic jet is insufficient to cut through the root opening through which nerve fibers and blood vessels enter the root channel from the surrounding jaw. As a result, the process of pulp resection / root canal progresses to the limit of self-limiting, for example if the apical opening is naturally closed, it cannot penetrate it, which is a known problem from prior art procedures. Causes and complications. In addition, the use of antiseptic or antibiotic solutions reduces the likelihood of infection after the procedure even if the root opening is damaged.

Moreover, since the time required to ablate, emulsify and aspirate all soft tissues in a typical molar is on the order of 10 to 240 seconds, the time and labor involved in the procedure is further reduced. The reduction in the time it takes to complete the removal step reduces the need for local anesthesia, reduces the time a patient suffers (if any), and increases the throughput of the dental procedure as a whole.

Next, the internal chamber of the tooth is aspirated completely and the removal of all soft tissues is confirmed. The inner chamber is then filled with a suitable filler known in the art, and the openings above the teeth are filled or provided with prosthetic crowns as known in the dental arts.

It should be noted that the fluid jet may comprise a pulsed jet formed by a pulse amplification device in a handpiece of a dental hydraulic jet tool as described in the US patent of Bear, cited above. Alternatively, the handpiece may be connected to a high pressure fluid source to form a steady stream jet exiting the orifice. Handpieces include endodontal, periodontal, surgical and recovery procedures such as gingivectomy, removal of granulation tissue, muco-osseous surgery, tooth decay, scaling, plaque and tartar removal, and extraction It may be directed to other teeth and tissues to perform extractions and tissue incisions.

The present invention generally includes dental treatment devices and methods that overcome the problems associated with existing mechanical, dental techniques and devices. In one aspect, the invention includes techniques for performing pulp resection or root canal procedures, i.e., removal of soft tissue in a tooth by ablation, emulsification, and aspiration of soft tissue.

Referring to FIG. 1, a typical human tooth 10 includes a crown 11 extending from the gingival tissue 12, at least one root 13 contained within each alveolus 14, and a chalk enamel boundary. It consists of a neck portion 16 which joins the root and crown in a cemento-enamel junction. The alveolar bone is a deep depression in the bone tissue of the mandible 17 and is aligned with the periosteum facing the teeth at each root end 18. At the edge of the alveolar bone, the periosteum continues with the ligaments of the gingival tissue 12. The hard tissue of the tooth comprises an ivory layer 21 providing the primary tissue of the tooth and a very hard enamel layer that forms a durable abrasive tooth surface and covers the crown 11 down to the chalk enamel boundary of the neck 16. 22).

The dimensional chamber 26 is formed in the ivory layer 21. Processes of the pulp chamber 26, called the root canal 27, are placed at the center of each root 13 and penetrate each root 18 at an apical foramen 28, which is a fine orifice. Is extended. The pulp chamber 26 and the root canal 27 include pulp, soft vascular tissue containing multiple nerves and blood vessels, and other tissue components. The pulp provides energy and nutrition to the teeth through the epithelial lining of the pulp chamber and the root canal.

The method of the present invention is used to treat teeth that have been diagnosed as having disease and require pulp resection / root canal surgery. Referring to Figure 2, the teeth are first opened by employing a dental drill 31 or a perforator or abrasive tool equivalent thereto. The resulting opening 32 extends through the enamel layer and the ivory layer to access the pulp chamber 26 and the root channel 27 as shown in FIG. A dental hydraulic jet tool 35 is provided comprising a handpiece 33 with a cannula 34 extended. The cannula includes a distal orifice adapted to generate a small volume of liquid jet 36 at high pressure and speed. The handpiece manipulated to insert the cannula 34 into the opening 32 directs the liquid jet 36 into the soft tissue in the pulp chamber 26 and the root channel 27. The liquid jet easily cuts through the soft tissue and the energy and turbulence generated by the liquid jet emulsify the soft tissue through contact. Moreover, the turbulent liquid easily penetrates into the narrow space of the root channel 27 (see FIG. 4) to perform thorough ablation and emulsification of the inner nerve and vascular tissues. Cannula 34 may provide a vacuum suction force and jet fluid to remove emulsified tissue, or a secondary suction cannula may be employed.

In a preferred embodiment of the present invention, the pressure range of the high pressure jet is approximately 3.45 to 413 MPa (500 to 60,000 psi) and the diameter of the jet is 10 to 800 μm. These variables are selected to provide a liquid jet that neither cuts nor adversely erodes the hard tissue of the tooth. As a result, the ablation and emulsification of the liquid jet 36 cannot damage the alveolar sac or periosteum at the root base because the apical opening cannot naturally pass through the apical opening 28 when the apical opening is naturally closed. . As such, the source of substantial postoperative complications present in prior art procedures is completely eliminated by the self-limiting features of the present invention.

The liquid jet 36 acts quickly in soft tissues and the time required to ablate, emulsify and aspirate all soft tissues in common teeth is approximately 10 to 240 seconds. Of course, more time is required for teeth such as a posterior tooth having a plurality of tooth root channels 27. As shown in FIG. 5, the dental hydraulic jet tool 35 may be manipulated to guide the cannula 34 and the liquid jet 36 into each root channel to remove all soft tissue therein.

The liquid constituting the liquid jet 36 may include sterile water or medical saline solution, preservative solution, or antibiotic solution, abrasive solution, other medicines or chemicals, or a combination thereof. In addition, one or more of these kinds of solutions may be used in a series of orders. For example, a saline solution is used for the ablation and emulsification process, then an abrasive solution is used to scour the cavity, a preservative solution is used to remove indigenous bacteria, and then an infectious agent. Antibiotic solutions may also be used to prevent regrowth of the bacteria. It should be noted that the fluid jet may comprise a pulsed jet formed by a pulse amplification device in a handpiece of a dental hydraulic jet tool as described in the U.S. Patent of the Bear cited above. Alternatively, the handpiece may be connected to a high pressure fluid source to form a steady stream jet exiting the orifice.

After the pulp chamber and root channel are completely aspirated to confirm removal visually, the pulp chamber and root channel are filled with an inert preservative 41 as known in the dental arts. Thereafter, the opening 32 is filled using standard dental material 42, such as silver amalgam, gold inlays or crowns, or cured composite materials. The procedure is completed in this way.

The use of dental hydraulic jets to perform pulp resection / root canal procedures exhibits the following advantages over the prior art.

1) complete removal of all soft tissue in the pulp chamber and the root channel

2) reduced use of anesthetics due to rapid completion, reduced pain for patients, and reduced cost and skilled office costs for skilled dentists

3) Elimination of complications due to perforation of the root or root opening

4) Sterilization of the surgical site by the use of appropriate jet liquid to minimize infection after surgery

Referring to FIG. 7, the apparatus for performing the above-described procedure includes a fluid reservoir 51 for supplying a working fluid to the dental hydraulic jet apparatus 35. As shown in FIG. Fluid from the fluid reservoir 51 is transferred to the pressure pump 52 to raise the fluid pressure to the above-mentioned pressure range. The pressure pump 52 is controlled by an electrical control unit 53 set by the system operator or dentist. The pressure regulator 54 limits the output pressure of the pressure pump 52, and the safety valve 56 provides a pressure cutout function if there is no setting of the safety condition. Pressurized fluid is transferred from the safety valve 56 to the control valve 57. The pressurized fluid output from the control valve 57 is selectively transported through the flexible tube line 61 to the dental hydraulic jet tool 35, the hydraulic jet tool 35 passing the high pressure jet 36 to the dentist or the like. Release under the supervision of another skilled practitioner.

The output of the control valve 57 is provided at the user's request by a switch 58 such as a footswitch or an on-off switch of the hydraulic jet tool 35. The control valve has the additional function of a pressure pump that immediately drops the pressure in the tube line 61 each time the switch 58 is turned off, whereby the high pressure jet 36 immediately drops the pressure. If a quick and accurate shutoff of the high pressure jet 36 is required, a shutter valve 59 may be provided at the output of the hydraulic jet tool 35 to mechanically block the high pressure jet output.

Referring to FIG. 8, there is shown a device for performing a dental procedure similar to the device of FIG. 7, wherein common components are provided with the same reference numerals appended with a prime ('). The primary feature of the apparatus of FIG. 8 is that it is provided with a pressurized air source 62, which transfers air pressure through the pressure regulator 63 to drive the pneumatic pressure pump 52 '. The other components operate substantially the same as described with reference to FIG.

The devices described in FIG. 7 or 8 may be housed in small cabinets suitable for the size and shape placed in a dental or medical office.

With reference to FIG. 9, one embodiment 70 of fluid reservoir 51 or 51 ′ includes a tank 66 with a fill fluid 67 held therein. A stopper 68 seals the tank opening, and the delivery tube 69 extends through the stopper and extends to the bottom of the tank 66. Another tube 71 extends through the stopper to pressurize the head space in the tank to flow fluid 67 through the delivery tube 69 to the pressure pump 52 or 52 '.

A further embodiment 75 of a fluid reservoir as shown in FIG. 10 includes some components that function similarly to the fluid reservoir of FIG. 9, and similar components are provided with the same reference numerals appended with a prime ('). do. The fluid reservoir or tank 75 holds an abrasive fill solution 73 used in the procedure that would benefit from an abrasive fluid jet. The abrasive solution is agitated by a mechanical stirring device as known in the art, and is provided with a stirring ball, stirring paddle, or tank 75 magnetically driven by an external magnetic device to retain the abrasive compound suspended in the fluid. It may also include a device for oscillating or vibrating.

Referring to Figure 11, another embodiment 76 of a fluid reservoir according to the present invention includes a seal bag 77 of premixed fluid 78 for use in a hydraulic jet apparatus. The seal bag 77 is placed in a sealable container or pressure transfer tank 79, and the discharge port 81 extends from inside the seal bag 77 through the sealable container to be connected to the pressure pump 52. The tank or vessel 79 includes a port 82 connected to a pressurized fluid source, such as the output of a safety valve 56 or 56 ', whereby the pressure in the vessel causes the pre-mixed fluid 78 to be pressure pump 52 Flow from discharge port 81 at a controlled pressure of. In this arrangement, the fluid in the reservoir 51 or 51 'does not need to be sterilized because the seal bag 77 prevents contamination of the pre-mixed fluid 78.

The simplified hydraulic jet fluid source shown in FIG. 12 includes a bag 83 of premixed jet fluid 84. The bag includes, at one end, a seal 86 extending through to allow the discharge tube 87 to connect the premixed jet fluid 84 to the pump 52. The bag further comprises means such as a hole 88 at the other end of the bag to easily suspend the bag in an inverted manner as shown, similar to the IV bag, whereby the premixed jet fluid is gravity from bag 83 Will be discharged in the direction of

A further aspect of the present invention is to provide a system for producing sterile fluid for use in dental hydraulic jet tools 35. Referring to Figure 13, the tank 91 is filled and replenished by a de-ionized water source 92. The chlorine injection device 93 adds chlorine gas or chlorine compounds to the tank to provide primary purification of water. The pump 94 also draws water from the tank and delivers it to the UV sterilizer 96. As water passes from the sterilizer 96 back to the tank 91, the ozonator 97 adds ozone to the water to further sterilize the liquid. The combination of chlorine, ultraviolet light and ozone is effective in removing bacterial, viral, and parasitic organisms from water and minimizes the possibility of infection from the use of dental hydraulic jet tools. Sterile fluid is aspirated from tank 91 by pump 98 and passes through sub-micron filter 99 and transferred directly to fluid reservoir 52 or 52 ′, or in any of the embodiments of the fluid reservoir described above. Transferred.

Referring to FIG. 14, the handpiece 33 of the dental hydraulic jet device 35 is a tube connector 102 concentrically coupled with the tubular barrel 101 and the proximal end of the tubular barrel 101. It includes. The jet tube 103 extends distal and concentrically from the tube connector 102 and is maintained at the center of the barrel by a plurality of spider spacers 104 and spacing lugs 106. The tube connector 102 is adapted to couple to the tube line 61 for supplying high pressure fluid, and the jet tube 103 extends to the distal end of the cannula 34. The interior space 107 of the barrel 101 includes an evacuation channel for fluid and debris and is coupled to the vacuum suction system through the connector 108.

The distal end of the cannula 34 extending from the handpiece 35 may be provided with various angular conformations as shown in FIGS. 15A-15D. Referring to Fig. 15A, the cannula tip 34a may be inclined at approximately 0 to 60 degrees from the axis of the hydraulic jet apparatus together with the distal end of the jet tube 103 which is generally coplanar with the distal opening of the cannula. The open end of the cannula provides suction and removal of fluid and debris through the channel 107 and the connector 108. As shown in Fig. 15B, the cannula tip 34b may extend linearly with the axis of the hydraulic jet apparatus with a jet tube 103 extending from the end of the cannula tip to the end. The extended jet tube provides improved visual observation of the hydraulic jet and impingement to the target. Moreover, in the root canal procedure described above, an extended jet tube may be inserted into the pulp chamber and root canal, facilitating the completion of the root canal procedure. 15C and 15D show cannula tips 34c and 34d, each cannula tip extending into an open tooth to bend at an angle of 60 to 120 ° to reach another inconspicuous target in the oral cavity. An angular bend. The cannula tip 34d is also provided with a curved portion adjacent the cannula tip.

16A and 16B, a further embodiment of the distal end of the cannula 34 includes a jet forming nozzle 111 extending perpendicular to the cannula 34 and connected to the jet tube 103. A bell shaped shield 112 extends around the jet forming nozzle 111 with curved conformations such as curved surfaces of conical section and preferably formed of transparent plastics or the like. The gap 113 between the shield 112 and the jet forming nozzle 111 is provided with a suction suction port and connected to the suction channel 107 of the cannula. The shield is formed by the impact of a hydraulic jet against the target. Capturing large amounts of spray, transparent plastic allows for visual observation of the target.

It should be understood that the dental hydraulic jet device disclosed herein may be employed to perform other treatments and procedures in addition to root canal and pulp resection. For example, fluid jets may be exceptionally suitable for performing calculus and plaque removal or root smoothing. This process may be enhanced through the use of an abrasive solution as the fluid for the fluid jet. Similarly, fluid jets may be used for osteotomy, as well as for excision and resection of gingiva, and for removal of granulation tissue. The fluid jet may also be an assistive treatment means of the extraction procedure in that the fluid jet is used to cut the fibrous attachment to the root and facilitate subsequent extraction. Such procedures may be assisted by the use of antibiotic solutions in forming fluid jets.

In addition, fluid jets of sufficient energy to remove caries tooth tissue may be used to provide treatment for simple caries removal and filling. Proper selection of jet energy has been known to selectively remove caries tissue without surrounding healthy enamel and dentin being damaged by the fluid jet. This process may be enhanced through the use of an abrasive solution as the fluid for the fluid jet.

Dental hydraulic jet devices provide all of the above treatment selection procedures as well as dimensional resection / root canal procedures without substantially generating heat and vibration at the target location. This feature is a significant advance over prior art machine tools, ultrasound devices and dental lasers.

The foregoing description of the preferred embodiment according to the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teaching without departing from the spirit and scope of the invention. The above described embodiments are chosen to best illustrate the principles and practical applications of the present invention in order that others skilled in the art may best utilize the present invention in various embodiments and various modifications suitable for the specific purposes contemplated herein. It is intended that the scope of the invention be defined by the claims appended hereto.

Claims (41)

In the method of removing all soft tissue in the pulp chamber and the root canal of a tooth, Forming an opening through the top of the tooth to access the pulp chamber, Providing a dental hydraulic jet tool having an orifice adapted to discharge high pressure and high velocity liquid jets, Directing a high pressure and high velocity liquid jet to the soft tissue in the pulp chamber and the root canal of the tooth to ablate and emulsify the soft tissue, Aspirating and removing the excised and emulsified soft tissue from the pulp chamber and the root canal; Filling the pulp chamber and the root canal with a dental filling compound, Closing the opening through the top of the tooth with a dental filling treatment Method of removing all soft tissue in the pulp chamber and the root canal of the tooth, characterized in that it comprises a. The method of claim 1, further comprising providing the hydraulic jet tool with a cannula adapted to extend through an opening formed in the upper portion of the tooth. . 2. The method of claim 1, further comprising providing a vacuum suction force through the cannula of the hydraulic jet tool. The method of claim 1 wherein the liquid jet is released at a pressure range of 3.45 to 206.8 MPa (500 to 30,000 psi). The method of claim 1, wherein the liquid jet has a diameter in the range of 20 to 800 μm. The dental pulp chamber of claim 1, wherein the liquid jet has sufficient energy to ablate and emulsify the soft tissue in the tooth, but insufficient energy to cut or substantially erode the hard tissue of the tooth. Method of removal of all soft tissues in the root canal. 2. The pulp chamber and root canal of claim 1, wherein the liquid jet has sufficient energy to ablate and emulsify soft tissue in the tooth, but insufficient energy to puncture the closed apical opening of the root canal. Method of removal of all soft tissues in the stomach. The method of claim 1, further comprising providing a vacuum suction cannula for performing aspiration and removal of the ablation and emulsified soft tissue. How to remove. 2. The dental pulp chamber of claim 1 further comprising providing a dental dam surrounding the tooth after the opening is formed and prior to directing the liquid jet to the soft tissue in the tooth. Method of removal of soft tissues. 2. The method of claim 1, further comprising providing the dental hydraulic jet tool with a sterile aqueous solution to form a liquid jet of the sterile aqueous solution. 2. The method of claim 1, further comprising providing the dental hydraulic jet tool with a preservative solution to form a liquid jet of the preservative solution. The method of claim 1, further comprising providing the dental hydraulic jet tool with a dental hydraulic jet tool to form a liquid jet of the antibiotic solution. The method of claim 1, further comprising providing a dental hydraulic jet tool with a constant source of high pressure liquid to deliver a constant jet stream from the orifice of all soft tissue in the pulp chamber and root canal of the tooth. How to remove. The method of claim 1, further comprising providing a pressure amplification device in the dental hydraulic jet tool to generate and deliver a pulse of high pressure liquid to the orifice. Method of removal. In the method of removing caries tissue from a tooth, Providing a dental hydraulic jet tool having an orifice adapted to discharge high pressure and high velocity liquid jets, Directing a high pressure and high velocity liquid jet to the cavities tissue to erode and ablate the cavities tissue, Aspirating and removing eroded and excised cavities Method for removing caries tissue from the teeth, characterized in that it comprises a. 16. The method of claim 15, further comprising providing a solution containing abrasive material to form a liquid in the liquid jet. 16. The method of claim 15 further comprising selecting a velocity and pressure range of the liquid jet that affects erosion and ablation of caries without substantially affecting surrounding healthy dental tissue. Of tooth caries tissue removal. In the method of removing calculus and plaque tissue from a tooth, Providing a dental hydraulic jet tool having an orifice adapted to discharge high pressure and high velocity liquid jets, Directing high pressure and high velocity liquid jets to tartar and plaque to erode and remove tartar and plaque, Aspirating and removing tartar and plaque Method of removing tartar and plaque tissue from a tooth comprising a. 19. The method of claim 18 further comprising selecting a velocity and pressure range of the liquid jet that affects erosion of tartar and plaque without substantially affecting surrounding healthy dental tissue. Method of removing tartar and plaque tissue. 19. The method of claim 18, further comprising providing a solution containing abrasive material to form a liquid in the liquid jet. In the method of surgical removal of soft tissue from the oral cavity, Providing a dental hydraulic jet tool having an orifice adapted to discharge high pressure and high velocity liquid jets, Directing a high pressure and high velocity liquid jet to the soft tissue to ablate and emulsify the soft tissue, Aspirating and removing ablation and emulsified soft tissue Surgical removal method of soft tissue from the oral cavity comprising a. 22. The method of claim 21, further comprising providing a solution containing antibiotics to form a liquid of the liquid jet. The method of claim 21, wherein the soft tissue comprises gingival tissue. 22. The method of claim 21, wherein the soft tissue comprises granulation tissue. 22. The method of claim 21, wherein the soft tissue comprises an intrinsic periodontal ligament that secures the root to the jawbone. In the dental hydraulic jet system, A dental hydraulic jet device having a jet nozzle adapted to discharge high pressure and high velocity liquid jets, A liquid reservoir for storing liquid, Pump means connected to the fluid reservoir to pump the liquid under high pressure into the dental hydraulic jet device; Control means for selectively operating said dental hydraulic jet device to release said high pressure and high velocity liquid jet Dental hydraulic jet system comprising a. 27. The dental hydraulic jet system of claim 26, wherein the liquid comprises a preservative solution. 27. The dental hydraulic jet system of claim 26, wherein the liquid comprises an antibiotic solution. 27. The dental hydraulic jet system of claim 26, wherein the liquid comprises an abrasive component. 27. A dental hydraulic jet system according to claim 26, wherein the fluid reservoir comprises a seal bag containing the liquid and guide means for guiding the liquid to the pump means. 31. The dental hydraulic pressure of claim 30 wherein said guide means comprises a sealed container adapted to receive said seal bag therein such that pressure in said sealed container is configured to pressurize said liquid to flow to said handpiece. Jet system. 31. A dental hydraulic jet system according to claim 30, wherein the guide means comprises means for suspending the seal bag in an inverted manner to flow the liquid to the pump means in a gravity direction. 30. The dental hydraulic jet system of claim 29 wherein the reservoir means includes a tank containing the abrasive solution and agitation means for retaining the abrasive component in the solution. The control valve according to claim 26, wherein the control means includes a control valve interposed between the pump means and the dental hydraulic jet device, and switching means for turning on and off the control valve by an operator of the hydraulic jet device. Dental hydraulic jet system. 35. The dental hydraulic jet system of claim 34, wherein the control valve includes means for immediately lowering the fluid pressure in the hydraulic jet device each time it is switched to the off state. In the dental hydraulic jet device, A handpiece having a peripheral end and a distal end, A cannula extending from the distal end of the handpiece, A jet tube extending through the handpiece and the cannula; Means for connecting a peripheral end of the jet tube to a high pressure liquid source; Jet nozzle at the distal end of the jet tube to discharge high pressure and high velocity liquid jets Dental hydraulic jet device comprising a. 37. The dental hydraulic jet apparatus of claim 36 wherein the handpiece comprises a tubular barrel extending about a portion of the jet tube. 38. The dental hydraulic jet apparatus of claim 37 further comprising suction means for removing jet fluid and dental tissue. 39. The dental hydraulic jet apparatus of claim 38 wherein the suction means includes a suction channel extending through the handpiece and the cannula. 40. The dental hydraulic jet apparatus of claim 39 wherein the suction channel comprises an interior of the tubular barrel. 41. A dental hydraulic jet apparatus according to claim 40 wherein the suction means comprises connector means connected to the interior of the tubular barrel and to a vacuum suction device.