JPH0443215Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the following methods for forming dental amalgam:
Concerning disposable capsules for prepackaging, storing and ultimately mixing mercury and metal powders.

Disposable capsules useful for containing coreactive ingredients, such as dental amalgam precursor materials consisting of mercury and silver or silver alloys, are well known. However, all conventional single-use capsules require some capsule manipulation (manual work) to effect the mixing of co-reactive ingredients.

It would be highly desirable to eliminate such manipulation of capsules, especially in the field of dentistry, where dental amalgams containing dental amalgam precursor materials could be prepared from the precursor material by simply placing the capsules in an amalgamator. Preferably it is a capsule.

Examples of conventional disposable capsules include capsules with a breakable membrane and a means for breaking the membrane prior to mixing of the coreactants. For example, U.S. Pat. No. 3,451,540 teaches a disposable capsule consisting of a telescoping cylinder which is actuated by sliding the two parts together to break the membrane dividing the capsule into two compartments, thereby allowing mixing of the co-reactants contained in the two compartments. Similar capsules are also disclosed in U.S. Pat. Nos. 3,625,349 and 3,595,439, in which the membrane is in the form of a pouch containing one of the co-reactants, which is broken by squeezing the pouch with either a rotating or sliding mechanism until it bursts. Further, U.S. Pat. Nos. 3,907,106; 3,860,114; 3,841,467; 3,831,742;
3655035; 3638918; 3756571; and 1, 774258
also teaches a similar capsule.

Disposable capsules of the type that utilize a removable plug to isolate the co-reactive components and allow mixing of the two components upon removal of the plug are also known in the art. For example,
In U.S. Patent 3,275,302, a ball or disk is positioned to divide the capsule into two chambers, each containing one of the coreactive components. To activate the capsule, the capsule is turned upside down to move the ball or disk. Other capsules utilizing removable stoppers are shown in U.S. Patents 3,796,303; 3,809,225; 2,527,992;
2527991; and 3785481.

Another disposable capsule has a passageway between the two chambers that can be closed or opened by twisting, sliding, or unscrewing one or more parts of the capsule. There are things that are. For example, US patent
3357545, when you unscrew the top of the capsule,
The stem at the top of the capsule is disengaged from the conduit at the bottom of the capsule. This removal of the stem allows the co-reactive components contained in the upper part to fall to the lower part. Similar capsules are available in U.S. Patents 3139180; 3139181; 3917062;
3963120; and 3924741.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a capsule for prepackaging and storing precursor materials for dental amalgam, in particular mercury and silver or silver alloys. Another object of the invention is to provide a dental capsule that allows mixing of precursor materials and formation of an amalgam without special manual handling of the dental capsule on the part of the user. Yet another object of the present invention is to provide a dental capsule that is less likely to leak mercury into the surrounding environment before or during the formation of the dental amalgam. The above and other objects of the present invention will become apparent from the following description.

A disposable dental capsule in one embodiment of the invention consists of a sealed capsule that is divided into two non-communicating interior chambers by a movable flexible disk. Due to the flexibility of the edge of the flexible disc (the thickness of the edge is less than the thickness of the central part), the edge of the flexible disc is pressed against the inner wall of the capsule, and the edge of the flexible disc and the inner wall of the capsule. A pre-measured amount of mercury is placed in one chamber, and a corresponding reaction amount of silver powder and mixing pestle are placed in the other chamber. One side of the flexible disk is convex and has an outer shape that matches the shape (preferably conical) of the opposite end of the mercury-containing interior chamber. If you put this capsule in an amalgamator,
As the petusl forces the flexible disk into engagement with the end of the capsule, mercury is forced from the outer periphery of the flexible disk and mixes with the silver powder.

The capsule consists of two interconnected hollow cylindrical members, each open at one end and closed at the other, with a connecting means for joining the open ends into a single closed container. ) is convenient. The capsule also includes internal means for securing and positioning the flexible disk against accidental movement prior to use of the capsule to prevent premature mixing of the amalgam precursor material. Preferably, it includes. The capsule is further coated on the walls of the mercury chamber to facilitate the flow of mercury from around the flexible disk when the capsule is placed in the amalgamator and the flexible disk is driven toward the distal end of the capsule. It may also include vanes or grooves. In the present invention, the flow of mercury from the periphery of the flexible disk is caused by the above-mentioned blade grooves or by means of passage through the flexibility of the edge of the flexible disk.

The advantage of the dental capsule of the present invention is that no manipulation of the capsule by the dentist or technician is required to effect the mixing of both components. Since the capsule forms a closed container and there are no externally moving parts, there is virtually no possibility of mercury leaking into the surrounding environment.

After the amalgam is formed within the capsule, the two hollow cylindrical members are separated to remove the amalgamated composition. The two hollow cylindrical members, one of which still contains the flexible disk, and the Petstle are then discarded.

In another aspect of the invention, the capsule is a hollow cylinder with shoulders spaced axially from the ends of the cylinder such that the inside diameter of the cylinder narrows at the shoulders. member; a removable cap closing one end of the hollow cylindrical member;
and a flexible plug having a stem extending through and in flexible engagement with the waist of the hollow cylindrical member. The flange extending outwardly from the end of the stem is spaced apart from the shoulder of the hollow cylindrical member and is in frictional engagement with the inner wall of the hollow cylindrical member over its entire circumference. The interior is divided into two discontinuous interior chambers.

Mercury is placed in the inner chamber of the plug surrounding the stem, and silver powder is placed in the other inner chamber of the cylinder. Petusl was placed in an inner chamber of silver powder,
It is of the weight and dimensions necessary to impact the flexible disk and force it toward the shoulder of the cylindrical member when the capsule is placed in the amalgamator. Such movement of the flexible disc with the petusle causes the stem of the flexible disc to be pushed further out of the waist of the cylinder until the flange of the flexible disc engages the shoulder;
The mercury is thereby forced through the edge of the flange into the interior chamber containing the silver powder, forming the dental amalgam.

Next, the present invention will be explained in detail with reference to the accompanying drawings. Referring first to FIGS. 1-5, an example of a preferred embodiment of the present invention is illustrated. This disposable capsule has an open end 9 and a conically shaped closed end 1.
2; a first hollow cylindrical member 10 having an open end 1;
9 and a hemispherical closure 20; and a flexible disc 14. The disc 14 divides the assembled capsule into two non-communicating interior chambers 23 and 24, as best seen in FIG.

A flexible disc 14 is disposed within the first hollow cylindrical member 10 such that its edges engage the inner wall of the first hollow cylindrical member 10 to form a continuous seal around the outer periphery of the disc. be done. In this case, the edge of the flexible disc 14 is pressed against the inner wall of the first hollow cylindrical member 10 in order to form a seal between the edge of the flexible disc 14 and the inner wall of the first hollow cylindrical member 10. This is due to the fact that the edges of the flexible disk 14 are flexible. One side 13 of flexible disk 14
is a positive (convex) cone, which is the first
The negative (concave) of the closed end 12 of the hollow cylindrical member 10
It is adapted to fit a conical shape, and therefore,
A flexible disc 14 is attached to this closed end 1 of the capsule.
2, it mates with the closed end 12.

The first hollow cylindrical member 10 also has an axially extending groove 11 around its open end 9, which groove 11 allows the first hollow cylindrical member 10 to open the second hollow cylindrical member 18. The end portion 19 can be telescopically engaged with the first and second hollow cylindrical members in this manner.
Once fixed), a sealed capsule is formed.

The wall thickness of the open end portion 19 of the second hollow cylindrical member 18 near the cylindrical portion 17 is slightly larger than the depth of the groove 11 provided in the axial direction of the first hollow cylindrical member 10. When the two hollow cylindrical members are telescopically fitted, an axially extending step 22 is formed at the junction of the two hollow cylindrical members inside the capsule.

The first hollow cylindrical member 10 has a plurality of vanes 15 provided along the inner wall in the direction from the closed end 12 to the open end 9 of the capsule. In the illustrated example, eight blades are arranged on the inner wall of the first hollow cylindrical member 10 at equal intervals. Preferably, at least three vanes are provided to prevent cocking of the flexible disk during loading or activation of the capsule, as described below.

The dimensions of the vanes are such that they maintain the flexible disc 14 at a suitable distance from the closed end of the first hollow cylindrical member 10 and ensure that the flexible disc 14 does not touch this closed end 12 when the capsule is actuated. It is determined so as not to interfere with fitting. Total length is approximately 1-1.25
(2.5 to 3.2 cm) and approximately 1/2 inch (1.3 cm) in diameter, the vanes 15 extend from the inner wall of the first hollow cylindrical member 10 by 3 to 15 mils (0.076 to 0.38 cm). mm) protruding, and the width may be 7 to 15 mm (0.18 to 0.38 mm). The vanes 15 may be tapered towards the open end 9 of the cylinder to facilitate the riding of the flexible disc 14 on the vanes during mixing, but the angle may be adjusted to suit loading requirements. It must be sufficient to prevent dislocation of the flexible disc 14 during storage and transportation of the dental capsule. It has been found that as the size and number of vanes 15 increases, the amount of reactive component remaining within the capsule after mixing increases. A person skilled in the art will therefore size the vanes both with a view to fixing the position of the flexible disk 14 during storage and transport, and reducing the amount of residue within the capsule.

As best shown in FIG. 4, the flexible disk 14 engages the inner wall of the capsule around the entire circumference of the first hollow cylindrical member 10, and the vanes 15 and steps 22
is held in a position between. This arrangement of the flexible disk 14 divides the interior of the capsule into a first interior chamber 23 and a second interior chamber 24 . The thickness of the outer edge of the flexible disk is slightly larger than the gap between the step 22 and the vane 15, so that a light pressure is applied to the flexible disk 14 within the assembled capsule. preferable. In a typical dental capsule, this gap measures approximately 5 to
60 mils (0.13-1.52mm), typically about 30 mils (0.76mm).

In the illustrated embodiment, the flexible disk 14 is the first
It has one conical side protruding toward the inner chamber 23,
This is the opposite closed end 1 of this first interior chamber 23.
Matches the conical shape of 2. The shape of the first interior chamber 23, the closed end 12 and the corresponding side of the flexible disk 14 may be oval or hemispherical, but preferably not planar. A flat surface would have a greater tendency for mercury to become trapped between the two surfaces during operation of the capsule.

As shown, the first chamber 23 contains mercury 25, which is considerably smaller than the second chamber 24, which contains silver powder 27 and petals 26. Activation of a preloaded capsule can be carried out by shaking it in a dental amalgamator, causing the capsule to reciprocate in a direction parallel to its main axis. Petstle 26 thereby rebounds between capsule closed end 20 and the opposite flexible disk surface, causing flexible disk 14 to
Quickly push towards the closed end 12 of the hollow cylindrical member 10. Once the flexible disk 14 is moved into engagement with the closed end 12, the mercury is hydrostatically forced from around the flexible disk 14 and into the second interior chamber 24. This influx of mercury is
It is accelerated by vanes 15 provided on the inner wall of the first hollow cylindrical member 10. That is, the vanes 15 form an opening in the seal along the outer circumference of the flexible disk. After a short time in the amalgamator, the capsule actually has only a single large chamber with a volume substantially equal to the sum of the volumes of the original chambers 23 and 24, in which the mercury and silver are contained. Both are included.

The edges of the flexible disk 14 must provide a seal to prevent mercury from escaping from the first interior chamber 23 during storage and transportation, as described above. In one embodiment shown in FIG. 4, the edges of the flexible disc 14 are grooved to form a double seal line on the underside of the upper end of the disc to enhance its sealing ability. . moreover,
The surface of the flexible disk 14 on the side of the petusle 26 is made concave, which uniformly transmits the force of the moving petusle to the front surface of the flexible disk 14, so that the flexible disk 14 There is less wobbling when climbing up and moving toward the closed end of the first hollow cylindrical member 10.

The two hollow cylindrical members constituting the capsule of the present invention are provided with interlocking means for the assembled capsule to prevent the two members from separating prematurely during transportation or handling. ing. Referring to FIG. 1, an axially extending retainer flange 40 is provided on the outer circumferential surface of the second hollow cylindrical member 18, and an axially extending retainer flange 40 is provided on the outer circumferential surface of the first hollow cylindrical member 10. One or more lugs 41 integral with an extended flange 42 snap-fit. Stop flanges 40 and 42 are also useful for separating hollow cylindrical members. As shown in FIG. 5, the lug 41 may be provided with an extension 43 projecting from the stop flange 42, so that there is a means for removing the lug by pushing the extension 43 towards the capsule body. It is formed.

In the embodiment shown in FIGS. 1-5, the outer surface of the first hollow cylindrical member 10 is a conventional amalgamator.
It has ribs 16 radiating from the center of the closed end 12 to adapt the shape of the capsule to the shape of the clip. The shape shown in FIG. 1 is preferred because it maintains a uniform wall thickness and therefore receives uniform cooling during capsule formation. Second hollow cylindrical member 1
The outer circumferential surface of 8 is also provided with suitable frictional gripping means, such as the knurls 21 shown in FIG. 1, to facilitate gripping and opening of the capsule after actuation.

6-8, another embodiment of the present invention is illustrated that utilizes alternative means for positioning and securing the flexible disk 14 within the capsule. In FIG. 6, the flexible disk 14 is provided with an annular flange 31 which is located between the base of the groove 11 of the first hollow cylindrical member 10 and the distal end 17 of the second hollow cylindrical member 18. It is compressed into the gap. During operation of the capsule, the flange 31 is freed under shearing or tensile stress due to the action of the Petsel 26 on the flexible disc 14, so that the flexible disc is dislodged and frees the first hollow cylindrical member 10. It is driven towards the closed end 12. In the embodiment of FIG. 6,
Once the annular flange 31 is removed, the structure of the disk is such that it does not provide significant resistance to the inflow of mercury from the edge 13 of the flexible disk 14. The side wall vanes 15 shown in FIG. 1 are not required.

Referring now to FIG. 7, flexible disk 14
Another embodiment is shown in which the cylindrical groove 32 is arranged and fixed in a cylindrical groove 32 formed in the wall of the capsule at the junction of two hollow cylindrical members. In yet another embodiment illustrated in FIG. 8, the first hollow cylindrical member 1
A flexible disk 14 is arranged and fixed between the annular ridge 33 of the cylindrical member 1 and the lip 22 formed by the end 17 of the second hollow cylindrical member 18.

Those skilled in the art will recognize that many other arrangements may be used to position and secure the flexible disk 14 within the capsule prior to actuation. For example, the flexible disk 14 can be lightly adhesively bonded to the interior wall of the capsule, fused in place by induction bonding, or held in place by other mechanical means. Therefore, the present invention
It is not limited to the structure described here.

The two hollow cylindrical members of the capsule can be formed from any material that is inert to the co-reactive components contained therein. Generally, the hollow cylindrical member is made of metal,
It should be made from a rigid material such as plastic, and in preferred embodiments from a rigid thermoflex plastic material such as polycarbonate, polyacrylic, polyvinyl chloride. Materials that are particularly advantageous in terms of ease of manufacture are LEXAN (GE) or
Polycarbonates such as MERLON (Mobay Chemical Company); or ASB polymers such as CYCOLAK ABS (Borg-Warner Company).

The flexible disk 14 may be made of, for example, acetal or polyester (e.g. DELRIN and
Preferably, it is made from a resilient, flexible material, such as a thermoplastic material such as HYTREL (both manufactured by DuPont). The advantageous material is HYTREL.

The flexible disk 14 and hollow cylindrical member are preferably formed by injection molding, although any suitable material forming method may be used.

The use of a rigid material for the hollow cylindrical member reduces the retention of mercury within the capsule. Furthermore, the combination of the rigid capsule and the flexible disc 14 does not require very strict manufacturing precision, as the flexible material of the flexible disc 14 accommodates small distortions in the structure of the hollow cylindrical member. Enables more economical and efficient production of devised capsules.

To load the dental capsule of the invention, a metered amount of silver alloy powder 27 or tablets of such powder is forced through the flexible disc 14 into the first hollow cylindrical member 10 after mixing. into the second hollow cylindrical member 18 along with a mixing petstle 26 of sufficient weight. A quantity of mercury suitable for forming a dental amalgam with silver alloy powder is placed in a first hollow cylindrical member 10 conveniently placed with its closed end down. The flexible disk 14 is then placed in the first hollow cylindrical member 10 and held in place by frictional engagement with its inner wall or other suitable means. Thereafter, the first tube containing the mercury and the flexible disk 14
The hollow cylindrical member 10 is turned upside down and fixed to the second hollow cylindrical member 18 by the lugs 41.

9-15, the illustrated embodiment of the capsule includes a first hollow cylindrical member 110 and a second hollow cylindrical member 110.
The first hollow cylindrical member 110 comprises a hollow cylindrical member 122 having a shoulder 111 spaced apart from its upper end 112 and lower end 113 in the axial direction. Therefore, the inner diameter of the first hollow cylindrical member 110 is constricted at a point remote from the ends 112 and 113.

In the specific example shown in FIG.
A plurality of ribs 114 are provided at the top of the hollow cylindrical member 110.
is provided, which helps retain the capsule within the amalgamator and also facilitates molding of the capsule. The rib 114 is connected to the first hollow cylindrical member 110
are arranged at equal intervals in a radial direction around the top of the Although 16 ribs are formed in the illustrated example, the number of ribs 114 may be increased or decreased as appropriate, depending on aesthetic and design considerations and the degree of distortion and shrinkage that can be tolerated during manufacture of the capsule. .

The rib is curved at the upper end 112 of the first hollow cylindrical member 110 and extends toward the lower end 113 to form the shoulder 1
It merges with the wall surface of the first hollow cylindrical member 110 at a point close to 11. Due to the shoulder portion 111, the internal volume of the first hollow cylindrical member 110 is divided into a stem receiving chamber 115 at its upper end and a co-reactive component accommodating chamber 11 at its lower end.
It is divided into 6.

The second inner chamber 116 includes a stem 118 and a flange 1.
A flexible disk 117 having 19 is arranged to divide the co-reactive component storage chamber 116 into two chambers for separately accommodating the co-reactive components. The outer periphery of flange 119 is shaped to match the inner diameter of co-reactive chamber 116, but is slightly larger than the inner diameter, and is generally circular disc-shaped. As shown, flange 119 is positioned about the lower end of stem 118 and sealingly engages the inner wall of co-reactive chamber 116 . Stem 118 frictionally engages shoulder 111 with a slidable fit toward its upper end. Since the material of the flexible disk 117 is a resilient flexible material, the flange forms a sufficient seal between the two interior chambers 120 and 121, while at the same time
Allowing the flexible disc 117 to move back towards the upper end of the first hollow cylindrical member 110 during actuation.

Preferably, the flexible disk 117 is made of a single piece of thermoplastic such as low density polyethylene, polyester (eg HYTREL) or polyacetal (eg DELRIN).

The shoulder 111, which may be of any shape, sealsly engages the stem 118 while the flexible disc 117 is at the upper end 1.
The stem 118 is shaped so as not to prevent the stem 118 from sliding when pushed in the direction 12. In the illustrated embodiment, the plane that engages the stem 118 is frustoconical in cross section. Of course, the shoulders can be rounded or pointed, but
It has been found that a conical truncated cross-section provides the best balance between seal-forming and sliding functions.

It is noted that the sealing function of shoulder 111 need not be as severe as that of flange 119. This is because leakage at shoulder 111 only transfers the reactive component to the surrounding environment, whereas leakage at the flange may result in premature reaction of both co-reactive components. However, if mercury enters the first interior chamber 120, it is important for safety reasons that the shoulder 111 also form a seal at least as effective as the flange 119.

Of course, the placement of the flexible disk 117 within the first hollow cylindrical member 110 creates first and second interior chambers 120 and 121 of sufficient volume to accommodate the required amount of co-reactive component. The position can be determined so as to give The relative volumes of the first and second interior chambers 120 and 121 can be adjusted by the position of the flexible disk 117. The first interior chamber 120 is particularly suitable for containing a liquid co-reactive component, such as mercury. 2nd interior room 1
21 generally contains co-reactive ingredients, either in liquid or powder form, such as silver or silver alloys. As mentioned above, the function of the illustrated capsule is to
The flexible disk 117 is attached to the first hollow cylindrical member 110.
This is accomplished by moving backwards towards the upper end, whereby the volume of the first internal chamber 120 decreases, and the volume of the second internal chamber 121 correspondingly increases, and the volume of the first internal chamber 120 increases accordingly. The co-reactive component is in the second inner chamber 1
Pushed out to 21. In order to generate the force sufficient to move the flexible disk 117 in this manner, as well as to facilitate mixing of the co-reactive components, a Petstle 131 is placed in the second interior chamber 121.
The length of the second inner chamber 121 in the longitudinal direction is equal to the length of the first inner chamber 121.
20 to allow the Petstle 131 to generate more force during shaking in the amalgamator.

The second interior chamber 121 is sealed by a second hollow cylindrical member 122 that is removably fitted to the lower end of the first hollow cylindrical member 110 .

The illustrated second hollow cylindrical member 122 has an integral structure of a hemispherical lower end 123 and a hollow cylindrical upper end 124, and the hollow cylindrical upper end 124 is provided around the lower end of the first hollow cylindrical member 110 in the axial direction. Telescopically engages groove 125. In the illustrated example, the second hollow cylindrical member 122 is joined to the first hollow cylindrical member 110 so as to be flush with each other, so that the second inner chamber 121 has a smooth inner surface. It has been found that increasing the irregularity of the inner surface results in higher residual amounts of both co-reactive components and reaction products remaining in the capsule after use. Apart from the obvious economic disadvantages due to increased residue, there may also be obvious environmental pollution problems due to the disposal of used capsules containing mercury and other toxic substances.

The second hollow cylindrical member 122 is replaced by the first hollow cylindrical member 1.
Although other means for removably attaching the second interior chamber 121 will be apparent to those skilled in the art, such as screwing, snap-fitting, push-fitting, etc., the above-described method is sufficient to provide the second interior chamber 121 with a regular inner surface. The method is preferred.

As shown, the second hollow cylindrical member 122 has a ridge 1 extending axially on its outer surface to facilitate removal from the first hollow cylindrical member 110.
26 may be provided. In addition, in the illustrated example,
Hollow cylindrical upper end 124 of second hollow cylindrical member 122
The height (length) of the groove 12 extending in the axial direction is
It becomes larger due to the length of 5. This structural relationship creates an axially extending groove 127 on the outer surface adjacent the ridge 126, which further facilitates removal of the second hollow cylindrical member 122 with thin-walled instruments or fingernails. .

Flexible disk 117 and first hollow cylindrical member 11
Returning to the relationship with 0, the length of the stem is shoulder 11
It will be clear from the figures that the distance between the stem and the upper end 112 is preferably smaller than the length of the stem receiving chamber 115.

To maximize the transfer of the reactive components contained in the first interior chamber 120 to the second interior chamber 121, the flange is moved into the first hollow cylindrical member until the upper surface 119a of the flange engages the shoulder 111. It is desirable to push it towards the upper end of 110. Therefore, the length of the stem must not be such that the grip of the amalgamator prevents lateral movement and thereby prevents engagement of the flange with the shoulder. The simplest way to ensure that lateral movement of the flexible disk is not limited by any of the amalgamator grips utilized by dentists and other dental technicians is to limit the length of stem 118 to the stem receiving The length should be shorter than the length of the chamber 115.

1 to 1.25 inches (2.5 to 3.2 cm) long and approximately diameter
In a typical dental capsule measuring 0.5 inches (1.3 cm), the length of the stem receiving chamber 115 is 0.16 inches (4.1 mm), and the length of the first inner chamber 120 is 0.16 inches (4.1 mm).
Length is 0.133 inches (3.4 mm), 2nd inner chamber 121
May be 0.81 inch (20.6 mm) long (before actuation).

Additionally, removable tape or end caps (not shown) may be used to protect the first hollow cylindrical member 1 from leaking mercury through the seal formed by the shoulder 111 into the surrounding environment.
The top end 112 of 10 may be sealed. If such a removable tape or second hollow cylindrical member 122 is utilized, an air vent may be provided to prevent air locking during movement of the stem 118 through the stem receiving chamber 115. Further, an air vent may be provided at a portion of the wall of the first interior chamber 120 near the shoulder 111 in order to prevent the air vent from restricting the movement of the flexible disk 119 toward the shoulder.

Another structural feature of this capsule is that the upper surface of the flange is shaped to match the lower surface 111a of shoulder 111. Due to this feature, both surfaces overlap, and from the first interior chamber 120 to the second interior chamber 120
A more complete transfer of co-reactive components into the interior chamber 121 is ensured. That is, upon completion of operation, the first interior chamber 120 essentially ceases to exist. This is the first
This is best shown in Figure 2.

To activate (activate) the capsule, the dental amalgamator is vibrated to swing the capsule perpendicular to the plane of the flange. Petsl 13
1 hits the lower surface of the flange 119 and pushes the flange 119 back toward the shoulder of the first hollow cylindrical member 110. As can be seen in FIG. 12, the mercury is forced through the outer periphery of flange 119. To facilitate the passage of mercury, the thickness of the outer circumference of flange 119 is smaller than the overall thickness of flange 119, i.e., flange 1
Preferably, the outer periphery of 19 is tapered (see FIG. 13). After mixing, the capsule may be cut to obtain an amalgam.

In order to load this aspect of the dental capsule, the present invention proposes that the flexible disk 117 is inserted into the hollow cylindrical member 11.
0 into the flange 11 from the lower end side.
9 is in sealing engagement with the inner wall of the first hollow cylindrical member 110, but the stem 118 remains in a position not yet engaged with the shoulder 111. Mercury is then introduced into the first hollow cylindrical member 110 from the side of the stem receiving chamber 115 and the flexible disk 117 is inserted into the first hollow cylindrical member until the stem 118 is sealingly engaged with the shoulder 111. 110 toward the upper end. After filling the second hollow cylindrical member 122 with silver or a silver alloy (powder or tablet form) and placing the petals 131 therein, the second hollow cylindrical member 122 is fitted into the lower surface of the first hollow cylindrical member 110. Alternatively, mercury may be sealed in the first inner chamber 120 and then silver or silver alloy and/or Petsur 1
31 into the co-reactive containment chamber 116, after which the second hollow cylindrical member 122 is inserted into the first hollow cylindrical member 110.
You can also put it on.

According to the present invention, two pre-measured components are
Mixing can be done in a more accurate and simpler way than previously known, without touching or metering by the user.
Although the containers of the present invention have been described above for mixing dental amalgam, other dental compositions, such as acrylic polymer dental filling materials, can also be packaged and mixed with the containers of the present invention. Furthermore, the container of the invention can also be used in non-dental applications where liquid components must be kept isolated until immediately before use (e.g. pre-packaging of epoxy resins and accelerators for the formation of adhesives). can.

[Brief explanation of the drawing]

FIG. 1 is an external view of one embodiment of the capsule of the present invention. FIG. 2 is an exploded arrangement view of the capsule of FIG. 1, partially in section. FIG. 3 is a cross-sectional view of the capsule of FIG. 1 before actuation.
FIG. 4 is a partially enlarged view showing in more detail the relationship between the flexible disk and two hollow cylindrical members of the capsule of FIG. 3; FIG. 5 shows the capsule of FIG. 1 after actuation has mixed the co-reactive components. FIG. 6 is a partial cross-sectional view showing the flexible disk and hollow cylindrical member of another embodiment of the capsule. FIG. 7 is a partial cross-sectional view showing the flexible disk and hollow cylindrical member of a third embodiment of the capsule. FIG. 8 is a partial cross-sectional view showing the flexible disk and hollow cylindrical member of a fourth embodiment of the capsule. FIG. 9 is an external view of one embodiment of a capsule according to another aspect of the present invention. FIG. 10 is a cross-sectional view of the capsule of FIG. 9 before actuation. FIG. 11 is an exploded parts arrangement diagram of the capsule of FIG. 10. FIG. 12 is a cross-sectional view of the capsule of FIG. 10 after actuation and mixing. FIG. 13 shows a cross-section of the outer periphery of the flange of the movable flexible disk. Figure 14 shows the first
The relationship between the outer periphery of the flange in Figure 2 and the inner wall of the capsule is shown. Figure 15 shows the capsule 15- of Figure 12.
15 is an end view taken along line 15. FIG. 10... First hollow cylindrical member, 14... Flexible disk, 18... Second hollow cylindrical member, 25... Mercury, 26... Petsur, 27... Silver powder, 110
...First hollow cylindrical member, 111...Shoulder, 114
...Rib, 115...Stem receiving chamber, 117
... Flexible disk, 118 ... Stem, 119
...Flange, 122...Second hollow cylindrical member, 1
31...Petsul.

Claims (1)

[Claims for Utility Model Registration] 1. A first hollow cylindrical member having an open end and a closed end; a second hollow cylindrical member having an open end and a closed end; 1st
and means for joining and fixing the open ends of the second hollow cylindrical member; the rim sealingly engages the inner wall of the capsule to divide the cylindrical container into two non-communicating interior chambers; a movable flexible disk shaped to match the shape of the inner surface of the opposite closed end of the capsule; forming a seal between an edge of the flexible disk and the inner wall of the capsule; edge pressing means for keeping the edge of the flexible disc pressed against the edge of the flexible disc in order to a predetermined amount of mercury contained within the inner chamber; a co-reactive amount of metal powder contained within the second inner chamber; a pestle within the second inner chamber containing the metal powder; and a vane or groove. or a disposable dental capsule consisting of passage means by means of a flexible edge of a flexible disc. 2. The capsule according to claim 1, wherein the inner surface of one end of the capsule is concave, and the opposing surface of the flexible disk is convex. 3. The capsule according to claim 2 of the utility model registration, wherein one side of the flexible disk has a convex conical shape, and the end surface of the capsule has a corresponding concave conical shape. 4. The capsule according to claim 1, wherein the first hollow cylindrical member is telescopically engaged with the open end of the second hollow cylindrical member around its open end. have an inner groove extending in the axial direction. 5. The capsule according to claim 4 of the utility model registration, wherein the first and second hollow cylindrical members are
The telescoping engagement is secured by engaging lugs on the first hollow cylindrical member with cylindrical flanges projecting from the second hollow cylindrical member. 6. The capsule according to claim 1 of the utility model registration claim, wherein the flexible disk positioning and fixing means includes a circumference provided on the inner wall of the capsule for receiving an edge of the flexible disk. Includes a directional groove. 7. The capsule according to claim 1 of the utility model registration claim, wherein the inner wall of the capsule is connected to either side of the edge of the flexible disk and the inner wall as means for positioning and fixing the flexible disk. including a circumferential ridge provided at the 8. The capsule according to Claim 1 of the Utility Model Registration Claim, wherein the flexible disk positioning and fixing means is provided in a circumferential direction in which the inner wall of the capsule is provided on one side of the edge of the flexible disk. and a plurality of vanes arranged in a circularly spaced manner on the inner wall surface extending opposite the edge of the flexible disk. 9. The capsule according to claim 1, wherein the inner wall of the capsule receives an annular flange extending from the edge of the flexible disk as means for positioning and fixing the flexible disk. One that includes a circumferential groove provided in the inner wall between the joint portion of the first hollow cylindrical member and the second hollow cylindrical member.