JPS58218957A - Dental mold tray - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental mold tray comprising a mold fixing member provided on at least a part of the inside of a shovel-shaped wing-shaped portion provided with a fixed or removable handle. As the mold material, alginate, a silicone-based composition, or a composite composition of silicone-based and alginate is often used, and is in a plastic or semi-liquid state at the initial stage.

When dentists take impressions of all or part of either the upper or lower jaw, they use a variety of metal or plastic mold trays. The tray is filled with plastic or semi-liquid material and then inserted into the oral cavity. Once the profile has solidified, the tray is removed from the jaws along with the solidified elastic profile. For example, if the tray is wedged between several teeth, it is necessary to apply an extremely large force when removing the tray. In order to hold the mold material in the tray, small holes were often formed in the known molds. During the making of the mold, a portion of the mold material is pushed into this hole to secure mold I to this part of the tray.

However, since it is difficult to manufacture, holes are not formed in the gravity portion in many cases in known mold trays. Alternatively, a protrusion was formed on the inside of the tray to prevent the profile from loosening from this protruding portion of the tray. When a rubber composition or the like is used as the mold material, a perforated lay is often not used. In this case, it is customary to achieve adhesion between the tray and the molding material by pre-treating the tray with an adhesive and then adhering it to the molding material.

If this method is adopted, it is relatively difficult to clean the tray after use if the tray is to be used repeatedly.

When the i-ray and the mold are removed from the oral cavity, an extremely large stress is applied to the joint between the tray and the mold.

If the solidified molding material in the tray loosens from the tray at some point during molding, the master mold produced from the mold will be distorted, and the crown, bridge, or prosthesis will also be distorted.

Although modern moldings are nearly perfect in terms of accuracy, the adhesion, or holding power, between the tray and the molding is insufficient in commercially available trays. In many cases, it is not possible to fix the mold material to the tray during mold making using only the holes in the tray, and trays with holes are difficult to clean. Satisfactory results cannot be expected from the method of using adhesive on the tray to fix the mold material. Adhesives are difficult to apply to the tray and difficult to scrape off after use, resulting in a large amount of time.

Therefore, in the known trays, the molding material is often peeled off from the tray due to insufficient fixation, and the molding has to be repeated, which often causes considerable inconvenience.

If the mold is loosened in an unchecked location, for example away from the edge of the tray, i.e. under the mold itself, the dentist will not be aware that the mold has loosened, and the bridge will be based on the original with any resulting deviations. will be created. In this case, the dentist may apply full or partial t1 to the majority of the work.
Changes must be made, which wastes time and inconveniences the patient.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a disposable tray made of plastic which is provided with fixing members on the inside which enable a strong connection between adjacent points on the inside of the tray. The present invention achieves this purpose by filling the tray with the molding material (pressing it against the fixing member), which penetrates into the plastic or semi-liquid molding material to form the mooring member, and when the molding material solidifies, the molding material is pressed against the fixing member. This is accomplished with a mold tray characterized in that said anchoring members are formed by a layer of evenly distributed form-locking members having sufficient stiffness to hold the moldings at close points d3.

A preferred embodiment of the invention utilizes a thin layer of nonwoven material containing elongated filaments to achieve the desired results. There are many filaments horizontally and vertically. Father, both in the longitudinal direction of the layers and in the transverse direction between the upper and lower sides, the profiles cooperate with each other in such a way that they have a high tear strength. Firas is spacious. Such a layer can be easily fixed to the inside of the tray using, for example, a bonding agent. For example, the filament layer can be fixed by pressing it directly onto a hot tray during compression molding or vacuum molding.

Once the tray has been trial-inserted into the patient's mouth and any possible modifications have been made to the shape of the tray, the tray is ready to be filled with molding material. When the tray is then pressed against the teeth, the profile is pressed against the filament layer inside the tray with a relatively large force. As a result, the plastic or semi-liquid form material penetrates into the outer layer of the filament layer, and the filament in this part is effectively embedded in the form material to form a reinforcing structure in the form material,
Also, since the filament in this portion is strongly connected to the rest of the filament layer, it will be strongly connected to the filament connected to a number of points close to each other inside the tray. Because the filament layer is formed to be extremely thin, on the order of 1 to 3 m+n, a plastic or semi-liquid material can often penetrate as far as the filament close to the inside of the tray, or as far as the inside of the lay.

A thin bottom layer of profile material is thus obtained which is in contact with the inside of the tray and is reinforced by the filaments connected thereto, although the C1 culmness differs.

Once the profile solidifies, and as a result the reinforced profile bottom layer also solidifies, the profile can be effectively fixed inside the tray in a manner similar to gluing the profile to the tray with an adhesive, as is known in the art. However, the advantage of this embodiment is that it is not necessary to apply adhesive to the tray before filling the mold H unlike in known adhesive methods, and the tray of the present invention does not require the mold material to be used with a specific adhesive. The main advantage is that it can be used for a variety of shapes, regardless of whether it is used or not.

In the tray of the invention, the semi-liquid or plastic profile penetrates as deep as possible into the non-woven layer, preferably inside the tray, so that the gaps between the filaments remain open as wide as possible during the pressure exerted by the semi-liquid profile. It is preferred that one layer of the filament has a relatively high compression resistance.

This increases the possibility that the profile will become wedged between the filaments of the layer. A suitable nonwoven layer for such purposes is a glass filament layer such as that used in some known gas filters. The plastic filaments in this gas filter are arranged in all directions. The thickness of the filament is extremely thin, for example, about 5 denier, and the length is extremely long. A number of relatively wide gaps are formed between the filaments. In order to maintain the size of the gap as much as possible, the filaments are fixed together at their mutual contact points. This fixation can be achieved in various ways. One method is to use a sticking agent. Alternatively, it is possible to weld the filaments at the intersection, in the sense that one component has a lower melting point than the other.
The filament is called a two-component plastic filament 1-. Heating to the lower melting point causes fixation at the intersection, but the higher melting point components are not affected.
Maintain N form. Embodiments that form relatively stable three-dimensional net structures are also possible, and such net structures are extremely suitable for the trays of the present invention as a three-dimensional fixed part.

Therefore, the basic concept of the present invention is that the Noiramen 1- forms a reinforcing structure on the bottom layer of the profile near the inside of the tray.

However, the fixing effect is further enhanced by combining the filament with known chemicals that fix the profile.

The chemical agents may be impregnated into the filaments or applied to the absorbent filaments which are mixed into the filament network to form the reinforcing structure itself.

Hereinafter, various embodiments of the shape material anchoring member according to the present invention provided inside the mold E-lay will be described with reference to the drawings of the twisting wire 1.

As is apparent from FIGS. 1-4, tray 10 is disposable and is therefore made of relatively thin plastic material. In the illustrated embodiment, a mat-like or layer-like shape mooring member 11 having a thickness of about 1 to 3 mm is provided inside the lays 1 to 1. In the embodiment shown, this Type I anchoring member consists of elongated filaments 12 intermingled with each other to form a nonwoven layer, which layer can be easily secured to the inside of the tray in a variety of ways, as described above. This plastic filament 1~
are crossed and brought into contact with each other at position 13 so that they have sufficient rigidity and are properly fixed. In this way, a felt or mat is formed from a very large number of plastic filaments whose fixation point spacing with adjacent filaments 1 is of a length necessary to form a three-dimensional network structure with a certain degree of compressive elastic resistance. Ru.

Such felts or mats are already known in connection with certain filter cloths used for the filtration of liquids or gases. By fixing such a fabric, which is known per se, inside the mold tray, it is possible to create a relatively side-like structure in the form of a thread that can resist the pressure of a plastic or semi-liquid mold material when this material is pressed against the inside of the mold tray. A layer of profiled anchoring members is obtained. The profile material penetrates the relatively thin layer of plastic filament, embedding the filament and forming the desired profile anchoring member once the profile solidifies. filamen
- The strong bonding of the plates to each other and to the inside of the tray ensures that the solidified profile is anchored at multiple points in close proximity to each other. This is because the filament 1 is incorporated into the bottom layer of the solidified profile as an effective reinforcing element.

However, the thread-like anchoring member of the present invention can be disposed in a limited area inside the 1-lay, and in that case, as shown in the cross-sectional views of FIG. 5 and related FIGS. 6 to 9, It can be placed in the recess of the tray.

In some cases, the plastic filament 12 in FIGS. 3 and 4 is replaced by an absorbent filament 14, as shown in phantom.
It can be mixed with J. This absorbent filament 1 can be made by using cellulose filament, which interacts chemically with the plastic or semi-liquid mold material used, and as the mold material solidifies, the C filament is fixed to the mold material. The cellulose filament may be impregnated with a bonding agent that binds the plastic filament and/or absorbent filament 14 to the profile.Alternatively, a low-viscosity bonding agent may be applied to the layer 13 before pressing it onto the profile, and this bond will cause the plastic filament and/or absorbent filament 14 to adhere to the profile. It may also be fixed.Absorbent filament 1-14
Instead of or in combination with C, small absorbents 15, such as cellulose particles, can be incorporated into layer 13 to achieve the same effect as absorbent filaments.

The embodiment shown in FIGS. 1-4 is inexpensive to manufacture. The plastic tray 10 may be any known type of tray with removable or fixed handles. A nonwoven layer 13 as described above is attached to this tray. Because the tray is a relatively thin plastic, it is typically manufactured by compression molding or vacuum forming, during which the plastic material is heated to become relatively flexible. Therefore,
A thin mat or felt-like fiber filament layer,
It is easy to secure the filament to the plastic by pressing it against the heated plastic material of the tray. A bonding agent may be applied to the inside of the ready-made tray and the mat or felt filament may be bonded thereto.

A prerequisite common to all embodiments is that the filament forms a number of very closely spaced fixing points inside the tray and is forced into a plastic or semi-liquid profile and anchored therein. This mooring effect, which has to be precise, can be made even stronger by using a bonding agent, but it is possible to securely hold the mold material on the tray side even without using a bonding agent.

The plastic head 16 in Figure 5 has multiple dents 17.
One of these recesses 17 is shown in cross section in FIGS. 6 to 9 together with various embodiments of the profile anchoring member according to the invention.

1 is further provided with holes 18, known in the art, which form anchoring elements for the profile 19. Preferably, the recesses are formed to have the same width, and the thin pieces of the shaped material anchoring member of the present invention are fixed in the recesses together with a bonding agent.

In the embodiment of FIG.
Upright Shirasunak filament 20 fixed to
Consists of. The filaments i to 20 all have the same length, and have hooks 21 at their outer ends, as seen in a so-called stand-up belt.

The hook 21 securely anchors the filament to the mold material 19.

The plastic filament 22 is constructed in the embodiment of FIG. 7 in the same manner as in FIG. In this embodiment, the free end portion is thicker than the inner end portion, and the filament is
It has a nub 23 that helps securely anchor it to the 9.

In the embodiment shown in FIG. 8, the filament is formed as a looped filament 24, and this loop acts as an anchoring member to the profile 19.

The filaments 25 shown in FIG. 9 cross each other to form layers and are secured to the bottom of the recess 17 and to the inside of the tray 16. The filaments are strongly bonded to each other at intersection points 26, indicated by black dots.

FIG. 10 shows rays 1 to 27 having a shape similar to a bird's long bone and having a trough-shaped leg cross section as shown in FIG. 11.
shows. This tray has a mooring member layer 2 of the present invention on the inside thereof.
8, and this mooring member enters the mold tfA19 to form a mooring portion. The chain line indicates the tooth 29, and the solid line indicates the outline of the tooth 30 ground to provide a crown. The arrow in the figure indicates the maximum force when removing the tray together with the solidified mold material, which requires strong adhesion between the mold material and the inside of the tray.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing an I-lay provided with a mat-like or layered material mooring member of the present invention on the inside, and FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 3 is an enlarged partial view of the sectional view in FIG. 2, FIG. 4 is a sectional view taken along line 4-4 in FIG. 3, and FIG. FIGS. 6 to 9 are partial sectional views showing various embodiments of the profile mooring members according to the present invention provided in the recesses of the tray shown in FIG. 5; Fig. 10 is a slope view of 1 to 1-lay which has a U-shaped trough shape with a reinforcing member on the outside and a mooring member of type 5 material of the present invention on the inside, and Fig. 11 shows what kind of force is generated. FIG. 10 is a cross-sectional view of one of the legs of the ray shown in FIG. 10, 16.27... i-ray 11... mooring member 12.20° 22, 24.25... filament
13.26...Intersection 14...Absorbent filament 21...Hook 23...Continuation of lump page 1 Priority claim @February 15, 1983 ■Sweden (
SE) ■8300828-4 ”j

Claims (14)

[Claims] (1) To take a mold of either the upper or lower jaw, place the material in a semi-liquid or plastic state on a tray and let it solidify naturally before removing the tray. A dental mold tray comprising shovel-shaped vanes provided with a number of fastening points close to each other on the inside of said tray 10.16.27, which forms a semi-liquid or plastic material when the tray is pressed against the jaw with the mold material. The overlying fixing members 12.20° enter into the profile 19 and form a layer of evenly distributed thread-like fixing members which, after solidification of the profile, is incorporated into the bottom layer of the profile as an effective anchoring element when the tray is removed. Features include 22, 24, 25 and a molded tray for teeth. (2) The fixing member 12 is directly fixed to the inside of the tray.
Ray. (3) The tray according to claim (1), wherein the fixing member is fixed to a support such as a textile material, and then the support is fixed to the inside of the tray by a fixing agent. . (4) The fixing members are filaments 20.22., each having the same length, standing upright in a U-shape from the inside of the tray, and having their lower ends fixed directly or indirectly to the inside of the tray.
Claim No. (1) characterized in that it consists of 24
Trays as described in section. (5) The tray according to claim 4, wherein the upper end of the upright filament is made thicker than the lower end to provide reliable engagement with the mold material. (6) The tray according to claim (5), wherein a bump 23 is formed at the end of the filament. (7) Claim 4, characterized in that the upper end of the filament is formed in the shape of a hook 21 to achieve a desired mooring effect to the mold material. Trays as described in section. (8) The tray according to claim (4), wherein the fixing member comprises a loop-shaped filament 24 fixed directly or indirectly inside the tray. (9) The fixing member is characterized in that the fixing member forms a mat or nonyl 1- of omnidirectional filaments to provide a porous anchoring filament mat. The tray described in (1). (10) The fixing member is extremely thin relative to its length, and its bottom side is incorporated into a nonwoven layer fixed to the inside of the tray.
Claim No. (9): The tray according to claim 9, characterized in that the tray is comprised of a Konseiko 12 and Iji. (11) The filament layer 11 has a maximum thickness of about 4 mm,
Tray according to claim 10, characterized in that it has a thickness of preferably 1 to 3 mm. (12) The filaments 1 to 12.25 intersect in various directions from various gas filaments in a known manner 'Cθ' and to each other at intersections 13.26 (by means of the joining filaments, a porous tertiary structure is formed). The tray according to claim 11, characterized in that it forms a net structure. (13) A tray according to any one of claims (9) to (12), characterized in that the filament is mixed with an absorbent fibrous material 14 such as cellulose. (14) Claim (1) characterized in that the absorbent fiber material is impregnated with a known adhesive that adheres to the mold material.
The tray described in section 3).