JP5960241B2 - Capsule and delivery tip for dispensing reactive dental material - Google Patents

Description

  The present invention relates generally to the dispensing of dental materials, and more particularly to the delivery of dental materials that can react with metals.

  In dental practice, it is often necessary to accurately place a small amount of material in a location that is difficult to reach in the patient's mouth. Working with some of these materials is often difficult due to their viscosity or their reactivity or corrosivity. Accordingly, many instruments have been developed to assist dentists or dental practitioners in placing various dental materials.

One such invention is disclosed in Patent Document 1 issued to Dragan et al. On February 6, 1996, entitled “Dental Cartridge Extruder with Rigid Drop in Front End”. This patent discloses a manual dental extrusion instrument or syringe for use in combination with a dental cartridge, capsule, or ampoule for extruding viscous dental material. It is incorporated herein by reference.
US Pat. No. 5,489,207

Furthermore, in the dentistry field, various capsules or tips have been developed for specific applications. One such capsule was disclosed on October 1, 1991, in Disccco, Jr. Is disclosed in Japanese Patent Application Laid-Open No. 2004-228561, entitled “Syringe and Disposable Capsule with Cannula for Use Thewith”. This patent discloses a capsule for dispensing dental material with a metal cannula that allows for the precise placement of dental material.
US Pat. No. 5,052,927

Another application of the tip is disclosed in U.S. Pat. No. 6,037,028, entitled “MicroAspirator”, issued March 2, 1999 to Dragan et al. This patent discloses a suction tip disposed on a flexible tube for removing blood, tissue debris and fluid from around a narrow surgical site.
US Pat. No. 5,876,384

Another dental cartridge for a specific application is disclosed in US Pat. No. 6,057,028, filed Oct. 24, 2000, to Dragan et al., Entitled “Dental Cartridge Having an Attachable Delivery Portion”. This patent discloses a dental cartridge or capsule having a delivery portion or cap comprising a body portion and a metal cannula. This dental cartridge allows the mixing of the first component of the dental material prior to dispensing, typically a powder and liquid component.
US Pat. No. 6,135,771

  Although these previously developed dental instruments have facilitated dentist dental practice in their specific or specific application areas, delivery systems dedicated to specific dental materials to facilitate dental practice There is a continuing need for development. The fact that some dental materials are reactive or corrosive to metals stores these dental materials in unit dose capsules designed for precise placement using metal cannulas. It brings a problem to keep. Some dental materials, such as those containing chemicals that can react with metals, are difficult to store and dispense. For example, aluminum chloride may be used as a component of dental materials. Aluminum chloride reacts with the metal when kept in contact with or in close proximity to the metal for a relatively long period of time. There continues to be a problem with the use of unit dose containers having a metal cannula holding dental material that can react with the metal cannula. As a result, dental materials can become unusable or cause undesirable effects such as discoloration or failure to perform as desired. Therefore, there is a need for a dedicated delivery system that allows for the storage of unit doses of dental material that may be responsive to be accurately dispensed using a metal cannula.

  The present invention provides a delivery system for accurately dispensing dental material using a metal cannula that is prevented from reacting with the dental material. Material capsules containing dental materials that can react with metals after prolonged contact have a sealed delivery tip connection termination. When the delivery tip coupling end is unsealed, the delivery tip with the metal cannula is securely attached in place. The material capsule is placed in a syringe for dispensing dental material through a metal cannula without prolonged contact. The delivery tip may be attached to the material capsule by a snap fit or a screw connection.

  In another embodiment, the material capsule has a material bore with a narrowing material bore transition and a material delivery port. The material capsule also has an expanding outer material capsule transition that terminates in an outer material capsule opening surface having an internal thread for receiving an externally threaded delivery tip having a metal cannula.

  An object of the present invention is to prevent dental material from reacting with the material of the delivery system.

  A more specific object of the present invention is to prevent dental material from reacting with the metal cannula for prolonged contact or proximity with the metal cannula.

  Yet another object of the present invention is to facilitate dental practice.

  Another object of the present invention is to provide a material capsule that is easily secured to a delivery tip having a cannula.

  An advantage of the present invention is that the dental material is stored in the unit dose container for an extended period of time without reacting with the capsule or delivery tip.

  Another advantage of the present invention is that it prevents the dental material from contacting or in close proximity to the metal cannula and prevents reaction or contamination of the dental material.

  Yet another advantage of the present invention is that the material capsule can be easily held to attach the delivery tip to the material capsule.

  A feature of the present invention is that the metal cannula is separated from contact with the dental material prior to dispensing the dental material.

  Another feature of the invention in one embodiment is that the material capsule has a snap-off type seal adjacent to the delivery tip connection termination.

  Yet another feature of the present invention is that various means are provided for securely holding the delivery tip on the material capsule.

  Another feature of the present invention is that a grip is formed on the outer material capsule surface adjacent to the opening.

  Another feature of the present invention is that a radially increasing outer transition extends between the end of the material bore and the outer surface of the delivery tip and a radially narrowing material bore transition is the end of the material bore and the material. It extends between the bore openings.

  These and other objects, advantages and features will become more readily apparent upon consideration of the detailed description set forth below.

FIG. 2 is a perspective view of the delivery system of the present invention without a delivery tip attached. FIG. 3 is a side view of an embodiment of the present invention without a delivery tip attached. FIG. 3 is a cross-sectional view of the embodiment described in FIG. 2. FIG. 6 is a side view of another embodiment of the present invention without a delivery tip attached. FIG. 5 is a cross-sectional view of the embodiment described in FIG. 4. FIG. 7 is a perspective view of an embodiment of a delivery tip. FIG. 7 is a side view of the delivery tip described in FIG. 6. FIG. 2 is a longitudinal sectional view of an embodiment of the present invention using a snap-on cap. FIG. 4 is a partial cross-sectional side view showing a material capsule and attached delivery tip. FIG. 7 is a partial cross-sectional side view showing a material capsule having an externally threaded delivery termination and an attached delivery tip. FIG. 6 is a partial cross-sectional side view showing a material capsule having an internally threaded delivery termination and an attached delivery tip. FIG. 2 is a longitudinal cross-sectional view of one embodiment of the present invention having a material capsule and an attached universal screw cap. FIG. 6 is a longitudinal cross-sectional view of another embodiment of the present invention having a breakaway tab and a male threaded delivery termination. FIG. 6 is a longitudinal cross-sectional view of another embodiment of the present invention having a breakaway tab and a female threaded delivery termination. FIG. 6 is a partial cross-sectional side view showing an attached delivery tip with a material capsule and a luer lock type connection. FIG. 5 is a perspective view of another embodiment of the present invention having a radially increasing outer material capsule transition and a luer lock type connection for receiving a delivery tip. FIG. 17 is a side view of the embodiment described in FIG. 16. FIG. 19 is a cross-sectional perspective view taken along line 18-18 in FIG. FIG. 17 is a side view of the embodiment of FIG. 16 with the delivery tip attached.

  FIG. 1 is a perspective view showing the delivery system and capsule of the present invention. The syringe 10 has a piston 16 that is installed in the lever 12 and the barrel 18. The lever 12 causes the syringe 10 to have a mechanical advantage that allows the dispensing of viscous dental material. The bleach 20 formed in the barrel 18 forms a shoulder 22 and a side wall 24 therein. The sidewall 24 may be flexible and provides a snap fit around the material capsule 26. The material capsule 26 is shown with a breakaway tab 32 applied. The syringe 10 may be similar to the syringe disclosed in US Pat. No. 5,489,207, which is hereby incorporated by reference.

  FIG. 2 is a side view showing the features of the material capsule 26 more clearly. The material capsule 26 has an outer flange 28. The outer shoulder 30 is formed adjacent to the flange 28. A cut or web 34 is formed between the breakaway tab 32 and the material capsule 26. The material capsule and breakaway tab 32 are preferably made of plastic.

  FIG. 3 shows the internal structure of the material capsule 26 more clearly. The material capsule 26 is sealed at one end by a plug or piston 48. The plug or piston 48 may be frictionally crimped in the material bore 38 or may be ultrasonically welded in the material bore so that it can be easily broken and dissociated when advanced. That is, the piston 48 is held in place but may be broken and released to dispense reactive dental material if desired.

  The dental material 39 is held in the material capsule 26. The inwardly angled transition 42 is reduced in diameter to be a delivery bore 40 adjacent to the delivery end of the material capsule 26. The delivery end has an internal flange 44 that forms an internal shoulder 46. The space 36 allows the webs 34 to be formed so that the tabs 32 can be crushed and removed from the material capsule 26 to form openings and expose the material 39 retained therein. .

  Dental materials can contain chemicals such as aluminum chloride that are reactive or corrosive to metals. The dental material can be any dental material that can react with the dispensing or delivery tip cannula. Other corrosive materials that may be used include potassium aluminum sulfate, aluminum sulfate, iron sulfate, aluminum ammonium sulfate or alum, iron chloride, sodium chloride, zinc chloride and the like. Preferably, the dental material is a retraction material used to relieve gingival tissue from around the teeth. The retraction material may be a clay-based retraction material. For example, the dental material may contain white clay or kaolin and aluminum chloride.

  4 and 5 show a slightly modified material capsule 126. The material capsule 126 has an outer flange 128 that forms an outer shoulder 130. Breakaway tab 132 is attached to material capsule 126 by web 134. Material bore 138 has an angled transition 142 on the inside, followed by delivery bore 140. A space 136 is formed adjacent to the delivery termination to allow formation of the web 134. Inner flange 144 forms an inner shoulder 146.

  6 and 7 show the delivery tip 56. Delivery tip 56 includes a body 58 having ribs 62. The main body 58 and the rib 62 are preferably made of plastic. A metal cannula 60 is formed at one end. A delivery tip coupling termination 66 is formed at the other end. Flange 64 is positioned adjacent to delivery tip coupling termination 66. The delivery tip coupling end 66 has a shoulder 68, a flat 70 and an angled portion 72. When the breakaway tab 132 described in FIG. 5 is removed, the delivery tip 56 may be placed in the material capsule 126 by inserting the delivery tip connection termination 66 into the opening formed by the inner flange 144. The shoulder 168 of the delivery tip coupling end 66 mates with the inner shoulder 146 of the material capsule 126. The delivery tip 56 is thus firmly connected to the material capsule 126 when the material held therein is dispensed. Separating the delivery tip 56 from the material capsule 26 in this way prevents the material held in the material capsule 126 from contacting the metal cannula 60 for an extended period of time. Thus, the time for the material to contact the metal cannula 60 is relatively short and any contamination or corrosive action is significantly suppressed.

  FIG. 8 shows an embodiment of the invention using a snap-on cap 74. The snap-on cap 74 may be used in place of or in conjunction with the breakaway tab when the breakaway tab is removed and it is desirable to reseal the material capsule 26. The snap-on cap 74 has a handle 75 and a cap coupling end 76. The cap cover portion 77 holds the snap-on cap 74 in place and serves to seal the material capsule 26. The combination of angled portion 82 and shoulder 78 and inner flange 44 and flat portion 80 ensure that snap-on cap 74 is firmly held in place and the opening of material capsule 26 is sealed.

  FIG. 9 shows the delivery tip 56 with a metal cannula 60 attached to the material capsule 26. The delivery tip coupling end 66 of the delivery tip 56 fits tightly with an internal flange 44 formed on the material capsule 26. As the piston 48 is advanced, the dental material 39 is pushed or dispensed from the delivery tip 56 through the metal cannula 60. The ability to unseal the material capsule 26 just prior to using the dental material 39 and place the delivery tip 56 there prevents long-term contact between the dental material 39 and the metal cannula 60. This prevents the possibility of corrosion or reaction due to prolonged contact between the dental material and the metal cannula 60. This leads to a significant improvement in the performance of some reactive dental materials.

  FIG. 10 illustrates another embodiment of the present invention that can be used when used with a viscous or viscous dental material to prevent separation of the delivery tip from the material capsule 226. In this embodiment, material capsule 226 with flange 228 and plug 248 has a male threaded end 244 that mates with a female threaded distal coupling terminal 266 of delivery tip 256. Thus, when the relatively viscous dental material 39 is extruded through the cannula 260, it does not cause the threaded delivery tip 256 to separate from the threaded material capsule 226.

  FIG. 11 shows another embodiment having a female threaded end 344. A female threaded end 344 is formed in the open end of a material capsule 326 having an outer flange 328 and a plug or piston 348. Delivery tip 356 has a male threaded tip coupling termination 366 that mates with a female threaded termination 344 to provide a rigid connection. Thus, the viscous dental material 39 that is pushed through the metal cannula 360 by advancing the plug or piston 348 does not cause separation of the delivery tip 356 and the material capsule 326.

  FIG. 12 illustrates one embodiment using a universal screw cap 274. The universal cap 274 includes a handle 275, a female screw cap connector 276, and a male screw cap cover 277. The universal screw cap 274 may be used for either the external thread end 244 of the material capsule 226 or the internal thread end 344 formed on the material capsule 326. A universal screw cap 274 may be used in place of or in conjunction with the breakaway tab.

  FIG. 13 shows another embodiment in which the material capsule 426 has an outer flange 428 at one end and a male threaded tip end 444 coupled to a breakaway tab 432 at the other end. In this embodiment, the breakaway tab 432 may be removed to form an opening and an internally threaded delivery tip 256 positioned there as shown in FIG.

  FIG. 14 shows another embodiment in which the material capsule 526 has an outer flange 528 at one end and a female threaded tip termination 544 at the other end. In this embodiment, breakaway tab 532 may be removed to form an opening, and male threaded delivery tip 356 may be threaded into female threaded distal end 544 as shown in FIG.

  FIG. 15 shows another embodiment having a luer lock type connection. The luer type connection has an occlusal male and female slightly tapered tube to provide a tight fit. FIG. 15 shows a material capsule 626 having an outer flange 628 and a piston 648 at one end and a male luer lock type connection 644 at the other end. The delivery tip 656 has a metal cannula 660 at one end and a female luer lock type connection 660 at the other end.

  16-18 illustrate another embodiment of the present invention that is similar to the embodiment illustrated in FIG. Material capsule 726 has an outer flange 728 and an outer material capsule surface 737. Adjacent to the outer material capsule surface 737 is a radially increasing outer material capsule transition 741 extending to the outer material capsule opening surface 743. A grip 763 is disposed on the outer material capsule opening surface 743. An internal thread 744 is disposed on the inner surface of the outer material capsule opening surface 743. Female thread 744 is adapted to receive a male thread on a delivery tip, such as delivery tip 656 described in FIG. A material delivery port 745 extends from the material capsule opening 747. As shown in FIG. 17, the material delivery port 745 has an external delivery tip surface 751 that extends beyond the material capsule opening 747.

  FIG. 18 is a cross-sectional perspective view showing the inside of the material capsule 726 in more detail. In this view, the transition from a constant diameter material bore 738 to a radially narrowing material bore transition inner surface 742 is clearly shown. The material capsule 726 is adjacent to an inlet end for receiving material and a plug or piston adjacent to the outer flange 728 as shown in the previous figures, a radially narrowing material bore transition inner surface 742. Has an opposite dispensing end. A radially narrowing material bore transition inner surface 742 extends to a material delivery bore 740 that opens to a material delivery port 745. In this embodiment of the material capsule 726, there is a smooth transition from a constant diameter material bore 738 to a material delivery port 745 via a radially narrowing material bore transition inner surface 742. The side wall of the material capsule 726 divides the end of the material bore 738 and the beginning of the radially increasing outer material capsule transition 741 so that they are approximately adjacent at the location of the bifurcated side wall tip 753. Thus, the radially narrowing material bore transition outer surface 749 branches off from the radially increasing outer material capsule transition 741 to form a gap of increasing size in the radial direction between the branched sidewalls. A material capsule opening 747 is formed on the opposite side of the apex. A female thread 744 is formed on the material capsule opening inner surface 765 and is adapted to mate with a delivery tip having a female luer lock type termination.

  This embodiment improves the dispensing of the viscous dental material retained in the material bore 738. For example, the dental material may be a clay-based gingival retraction paste containing aluminum chloride and kaolin clay. Preferably the retraction paste contains 15 percent aluminum chloride. The retraction paste is loaded into the material bore 738 and sealed using a plug adjacent to the outer flange 728 as shown in FIG. 15, and the material delivery port 745 has a removable cap as shown in FIGS. And sealed. The material capsule 726 may then be loaded into a foil package that is sealed so as to be separated from the delivery tip having a metal cannula. This prevents aluminum chloride, which can be corrosive, from reacting with the metal cannula over a period of time.

  The material in the material capsule 736 is easily dispensed by setting the material capsule 736 into the syringe 10 as shown in FIG. A plug or piston as shown in the previous figures is placed in the material bore 738 to push the viscous dental material out of the material delivery port 745 through the attached delivery tip.

  FIG. 19 is a side view of a delivery material capsule system using a material capsule 736 with a delivery tip 756 attached. Delivery tip 756 has a body 758 and a metal cannula 760. The metal cannula 760 may be ductile or easily bent. Delivery tip 756 may be attached to material capsule 726 by any type of attachment. Preferably it is screwed into the material capsule 726. The grip 763 significantly facilitates threading of the delivery tip 756 into the material capsule 726.

  Thus, all the various embodiments of the present invention are all separated into a sealed material capsule and are in prolonged contact with a metal cannula used to accurately place the dental material in the patient's oral cavity. Dental materials that can exhibit corrosiveness or reactivity that is prevented. Not only is the direct contact of the corrosive or reactive dental material with the metal cannula prevented, but also the corrosive or reactive dental material metal cannula. It is desirable that the proximity state is prevented and preferably not enclosed in the same package. For example, a material capsule that holds dental material may be packaged in a pouch that is sealed to separate from a delivery tip with a metal cannula. Furthermore, embodiments having pistons or plugs ultrasonically welded to the material capsule may be advantageous in preventing leakage of corrosive gases from dental materials that may be corrosive or reactive. Absent. Metal cannulas need to avoid prolonged contact or proximity with volatile gas components that can arise from dental materials that can be corrosive or reactive. Thus, the present invention significantly improves unit dose material dispensing systems that can be used with reactive or corrosive dental materials. The present invention thus provides improved results and facilitates dental practice.

Although the invention has been described with respect to several embodiments, it should be readily understood that various modifications can be made without departing from the spirit and scope of the invention.

Claims (14)

A delivery system for dispensing dental material that may be reactive or corrosive,
A piston end and an initially sealed delivery tip end , a constant diameter material bore, and a delivery bore adjacent to the delivery tip end after transitioning such that the material bore is reduced in diameter; A material capsule having:
A reactive dental material loaded in the material capsule and reactive or corrosive to metals ;
A piston disposed within the piston end of the material capsule;
A delivery tip including a metal cannula;
A sealed pouch including the delivery tip that prevents the reactive dental material from contacting or proximate the metal cannula until ready for use;
Means on the delivery tip end of the material capsule for attaching the delivery tip;
A delivery system whereby this prevents contact with the metal cannula prior to dispensing of the corrosive or reactive dental material.   The delivery system for dispensing potentially reactive or corrosive dental material according to claim 1, wherein the means comprises a snap fit. The delivery system for dispensing potentially reactive or corrosive dental material according to claim 2 , wherein the snap fit includes a mating shoulder.   The delivery system for dispensing potentially reactive or corrosive dental material according to claim 1, wherein the means comprises threads.   The reactive according to claim 1, wherein the reactive dental material is selected from the group consisting of potassium aluminum sulfate, aluminum sulfate, iron sulfate, aluminum ammonium sulfate or alum, iron chloride, aluminum chloride, sodium chloride, and zinc chloride. Or a delivery system for dispensing dental materials that may be corrosive. A delivery system for dispensing dental materials that may be reactive or corrosive from a metal cannula,
A syringe,
A piston termination and delivery tip termination , a constant diameter material bore, and a delivery bore adjacent to the delivery tip termination, wherein the material bore is reduced in diameter , disposed within the syringe ; A material capsule having:
Threads installed on the delivery tip end of the material capsule;
A seal disposed on the delivery tip end of the material capsule;
A reactive dental material loaded in the material capsule and reactive or corrosive to metals ;
A piston disposed at the piston end of the material capsule;
A delivery tip having a first end and a second end;
A metal cannula formed on the first end of the delivery tip;
A sealed pouch including the delivery tip that prevents the reactive dental material from contacting or proximate the metal cannula until ready for use;
A mating thread formed on the second end of the delivery tip, the mating thread being disposed on the delivery tip end of the material capsule; Including a thread to mate,
A delivery system whereby the corrosive or reactive dental material is held separately within the material capsule, preventing contact or proximity with the metal cannula prior to dispensing. 7. The delivery system for dispensing potentially reactive or corrosive dental material from a metal cannula according to claim 6 , wherein the reactive dental material comprises aluminum chloride. 7. Dispensing potentially reactive or corrosive dental material from a metal cannula according to claim 6 , further comprising a threaded cap disposed on the delivery tip end of the material capsule. Delivery system. 7. Dispensing potentially reactive or corrosive dental material from a metal cannula according to claim 6 , further comprising a breakaway tab disposed on the delivery tip end of the material capsule. Delivery system. The piston is ultrasonically welded to the end of the piston of the material capsule, and the piston is held in place but is broken down and released to dispense the reactive dental material. 7. A delivery system for dispensing potentially reactive or corrosive dental material according to claim 6 from a metal cannula. A delivery system for dispensing dental materials that may be reactive or corrosive from a metal cannula,
A material bore having a constant diameter and an outer material capsule surface, the material bore having a material capsule having an inlet end and a dispensing end;
An outer flange formed on the material capsule adjacent to the inlet end;
A branched sidewall apex formed in the material capsule adjacent to the dispensing end of the material bore;
A radially narrowing material bore transition inner surface adjacent to the dispensing end of the material bore and extending from the branched sidewall apex, wherein the radially narrowed material bore transition inner surface is a mouth A radially narrowing material bore transition inner surface ending in a material delivery bore comprising:
A radially increasing outer material capsule transition surface adjacent to the dispensing end of the material bore and extending from the bifurcated sidewall apex, the radially increasing outer material capsule transition A material bore transition where the surface terminates in an outer material capsule opening surface with an opening and a gap having a radial dimension that increases from the branched sidewall apex toward the opening narrows in the radial direction A radially increasing outer material capsule transition surface formed between an inner surface and the radially increasing outer material capsule transition surface;
An internal thread formed on the inner material capsule opening face adjacent to the opening in the gap;
A delivery tip having a metal cannula attached to the female screw,
A delivery system whereby the corrosive or reactive dental material is held separately within the material capsule, preventing contact or proximity with the metal cannula prior to dispensing. 12. The potentially reactive or corrosive dental material of claim 11 further dispensed from a metal cannula, further comprising a grip disposed on the outer material capsule opening face adjacent to the opening. Delivery system to do. 12. The delivery system for dispensing potentially reactive or corrosive dental material from a metal cannula according to claim 11 , further comprising a retraction dental material loaded into the material capsule. 12. The delivery system for dispensing potentially reactive or corrosive dental material from a metal cannula according to claim 11 , wherein the retraction dental material comprises aluminum chloride and kaolin clay.

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