JP2001112787A - Dental impression tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ready-made hemi/full jaw impression tray used in dental treatment for molding the impression of the dentition in the upper/lower jaw so as to easily mold impression of a patient having an individual difference in a mouth such as the dentition row varied in the form and dimension without any laborious technique. SOLUTION: For each of upper and lower jaws, a left side hemi-jaw impression tray and a right side hemi-jaw impression tray with different forms are prepared, and a grip is constructed so as to integrate the respective hemi-jaw trays selected according to the dentition of a patient together, while a fixing device for connecting the grip is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental impression tool, and more particularly to a dental or edentulous jaw for producing a research model, producing a personal tray, or producing a crown denture or a denture. The present invention relates to an impression tray for impressing upper and lower jaw teeth used for impression acquisition.

[0002]

2. Description of the Related Art In dental practice, alginate, silicone rubber, polysulfur rubber, and the like are used as impression materials for accurately capturing the shape of a dental row, an abutment, and adjacent tissue.
Zinc oxide Eugenol paste, compounds, etc. are used, but this impression material does not flow even in the oral cavity,
A tray is a device which is located at an appropriate place until curing and holds the impression material so as not to be deformed even after the impression is cured. For example,
Some examples of ready-made impression trays are described on page 46 of "New Common Dental Dictionary" (Medical Publishing Co., Ltd.).

[0003] Generally, ready-made trays are used for both preliminary impressions and real impressions except for impressions using personal trays.
The condition that the tray should have is that it can be adjusted to a certain degree such as bending according to the oral cavity of the patient, that it has a certain degree of rigidity so that the impression does not deform when it is removed from the oral cavity, etc. The ability to hold the material until after the gypsum set.

Conventionally, this type of ready-made tray has the structure shown in FIG. 9 or FIG. That is, FIG. 9 is a symmetrical full-jaw tray, which is composed of a tray 2 and a handle 4, and FIG. 10 is a one-jaw tray for impressing only one of the right and left sides. 6 and handle
Consists of 8, 8. The tray itself is made of metal or plastic, and is provided with holding holes and grooves for bringing the impression material into close contact with the tray. Each tray has three to five different sizes and forms according to the dentition of the patient, and ones for edentulous jaws, toothed jaws and children are prepared according to the application. In addition, with the aim of improving the complexity of the dental technician work and shortening the chair time, there has been proposed an impression tray provided with a removable handle so that impressions of the defective part and the prosthetic part can be obtained at the same time. Kaihei 8-
No. 266561).

However, the oral cavity of a patient has a large individual difference and a great deal of variation, and it is difficult to make an impression of the oral cavity of all patients with three to five types of ready-made trays. At present, dental care is not satisfactory.

[0006] Further, the conventional full-jaw ready-made trays are all bilaterally symmetrical, so that even for patients with different dentition forms and sizes on the left and right sides, a tray that is approximately suitable is selected, and the patient's dentition form is selected. It was necessary to bend and cut the edge of the tray in accordance with the requirements, and a great deal of skill was required to obtain the impression. In addition, when taking an impression of a patient with a short lip circumference, such as a stomatitis or trismus, it is extremely difficult to insert the full-jaw tray into the oral cavity because the size of the full-jaw tray is too large.

On the other hand, even if the left and right dentitions are separately obtained with a single jaw tray, the two cannot be integrated, so that a full jaw model is prepared using two conventional single jaw trays. It was impossible to make.

[0008]

Therefore, in order to solve the above-mentioned problems of the prior art, the present invention prepares several types of single-jaw trays in which the full-jaw tray is divided into two parts at the median, depending on the size and form, and By combining the side jaw tray,
It is an object to assemble a tray matched to a patient's unique dentition. Another object is to obtain a full jaw impression by inserting the tray into the mouth one by one and then integrating the left and right sides.

[0009]

SUMMARY OF THE INVENTION The present invention provides a left-hand jaw ready tray and a right-hand jaw ready tray having different dimensions and shapes for both the upper and lower jaws, and each of the jaws selected according to the patient's dentition. It is characterized by comprising a fixing device for integrating the tray as a full-jaw impression tray.

That is, by using a half-sized handle and a fixing device having an instant polymerization resin, a pin lock system, an attachment or a slide mechanism, two rigidly attached to the left and right one-jaw tray middle part. By firmly connecting and fixing the handle, it is integrated into a full chin tray,
In addition to being used as a one-jaw tray, a two-jaw tray can be combined to obtain a full-jaw impression tray.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an impression tray according to the present invention will be described in detail with reference to the accompanying drawings, in which the same components are denoted by the same reference numerals.

[0012]Example 1  FIG. 1 is a perspective view of an impression tray according to a first embodiment of the present invention.
It is a diagram, and a spindle is used for the handle 12 of the tray 10.
Things. That is, the left and right single-jaw impression trays 14,
Spindle handles 22 and 24 are connected to 16 via connecting plates 18 and 20
And fix these spindle handles with holder 25
It is configured as follows. Insert spindles 22, 24 into holder 25
Tightly fit the left and right trays firmly together
Into a bilateral full-jaw impression tray. Left right
Size, form or dentition for edentulous, edentulous jaws
Prepare several kinds of top and bottom.

[0013] In actual clinical practice, it is possible to select a symmetrical one-jaw tray on the left and right sides and use it as a full chin ready-made tray as before, or select a different one-jaw tray on the left and right sides. The combination provides a full-jaw tray that matches the patient's specific dentition. Even if a different tray is selected on the left and right sides, the handle portion of each one-jaw tray is brought into close contact with each other as shown in FIG. .

[0014]Example 2  FIG. 3 is an oblique view of the single-jaw full-jaw tray according to the second embodiment of the present invention.
In the view, tapered handles 26 and 28 were attached to trays 14 and 16.
Things. That is, the shape of the handle is tapered at the tip
It is a semi-conical shape with a mark, and the left and right handles 26, 28 are
To form a conical handle 30, which is used as the charging means 31.
Fit to form a full jaw tray.

[0015]Example 3  FIG. 4 is a perspective view of the single-jaw full-jaw tray according to the third embodiment of the present invention.
In the figure, dows are applied to the left and right handles 32 and 34 of the trays 14 and 16, respectively.
Ellipse 35 protrudes and fits with these dowel pins
Using the fixing means 36, the left and right trays are firmly integrated
Connect to form a full jaw tray.

[0016]Example 4  FIG. 5 is a perspective view of a fourth embodiment of the present invention,
Butt surfaces of left and right handle parts 38, 40 attached to the ends of the leh 14, 16
A plurality of concave portions 42, 42 and convex portions 44, 44
The left and right trays are firmly integrated by fitting the parts
Into a full-jaw tray.

[0017]Example 5  FIG. 6 is a perspective view of a fifth embodiment of the present invention. Sand
That is, the distance between the concave portions 42, 42 and the convex portions 44, 44 of the fourth embodiment.
Embedding magnets 45 and 47 with different polarities
The left and right trays are firmly secured by the suction force of the
To form a full jaw tray.

[0018]Comparative Example 1  FIG. 7 is a perspective view of the single-jaw full-jaw dual-purpose tray according to the first comparative example of the present invention.
In the figure, the edge of the half-size tray and the left and right tray patterns 46, 48
Was temporarily fixed with an instant polymerization resin 50.

[0019]Comparative Example 2  FIG. 8 is a perspective view of a two-jaw single-jaw tray according to a second comparative example of the present invention.
In the figure, diamond blocks 56 and 58 are attached to the left and right tray patterns 52 and 54.
And the left and right trays are integrated using the fixed block 60
Into a full-jaw tray.

An actual clinical application was attempted using the trays of Examples 1 to 5 and Comparative Examples 1 and 2. Operability when connecting and fixing the left and right single jaw trays, strength when connecting and fixing, The operability when dividing the tray after the gypsum was cured and the stability of the material by sterilization were evaluated. Table 1 shows the results.

[0021]

[Table 1]

As described above, Examples 1 to 4 are excellent in all of the operability, strength and material stability at the time of connection and division. In Example 5, the magnet portion was corroded by the sterilization. However, the corrosion can be prevented by using gas sterilization or shielding the magnet itself.

As described above, as a preferred embodiment of the present invention, the first embodiment
From the embodiment to the fifth embodiment, the description has been given for the connection and fixing of the left and right tray handles. However, by adopting a similar connection mechanism at the middle edge of the left and right single jaw tray, the joining strength is improved, and the handle is not provided. Trays can also be manufactured. Examples 1 to 5
It is needless to say that various design changes can be made without departing from the spirit of the present invention without being limited to the description. For example, in the first embodiment, the spindle handle is attached to the impression tray via the connecting plate, but the handle can be directly connected to the impression tray on the spindle without using the connecting plate.

[0024]

According to the impression tray of the present invention, the left and right side jaw trays are combined and integrated into a full-jaw ready-made tray. It can also be used as a tray for use, increasing the applications. In addition, all-jaw trays having many shapes and dimensions can be procured by combining one-jaw trays. further,
Impression accuracy is improved because a full-jaw tray that matches the patient's unique dentition can be procured. In addition, the use of trays that match the dentition not only reduces the amount of impression material used, but also allows the individual jaw trays to be inserted separately into the oral cavity, one at a time. It is easy to take impressions of small patients. Also, in some cases, after taking an impression, even if there is a problem with the impression of only one jaw and a re-impression is necessary, it is possible to redo only that one jaw. Furthermore, after the plaster is injected and hardened, the one-jaw tray is peeled off from the plaster model, so that the impression can be easily removed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a single-jaw full-jaw tray according to a first embodiment of the present invention, in which a spindle is applied to a tray handle.

FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 showing a state in which a handle at the median portion of each one-jaw tray is brought into close contact.

FIG. 3 is a perspective view of a single-jaw full-maximal dual-purpose tray according to a second embodiment of the present invention, using a tapered handle in the tray handle.

FIG. 4 is a perspective view of a single-jaw full-maximal dual-purpose tray according to a third embodiment of the present invention, in which a dowel pin is provided on a tray handle.

FIG. 5 is a perspective view of a fourth embodiment of the present invention, in which uneven fitting is used as a fixing means.

FIG. 6 is a perspective view of a fifth embodiment of the present invention, in which a magnet is used as fixing means.

FIG. 7 is a perspective view of a single-jaw full-jaw dual-purpose tray according to a first comparative example;
The tray edge and tray handle were temporarily fixed with an instant polymerization resin.

FIG. 8 is a perspective view of a single-jaw full-jaw dual-purpose tray according to a second comparative example;
A diamond block is used as fixing means.

FIG. 9 is a perspective view of a conventional off-the-shelf symmetric full-jaw tray.

FIG. 10 is a perspective view of a conventional one-jaw tray in a ready-made tray.

[Explanation of symbols]

 2 tray 4 handle 6 tray 8 handle 10 tray 12 handle 14 left single jaw impression tray 16 right single jaw impression tray 18 connecting plate 20 connecting plate 22 spindle 24 spindle 25 holder 26 tapered handle 28 tapered handle 30 conical pattern 31 charging means 32 handle 34 handle 35 dowel pin 36 fixing means 38 handle portion 40 handle portion 42 concave portion 44 convex portion 45 magnet 46 handle 47 magnet 48 handle 50 immediate polymerization resin 52 handle 54 handle 56 diamond block 58 diamond block 60 fixing block

Claims (7)

[Claims] 1. Upper and lower and right and left one-jaw impression trays formed in two parts in the median part are formed in different shapes and sizes, and the upper, lower, left and right two-jaw trays are respectively patterned. Dental impression tray characterized by attaching a part. 2. The upper and lower and right and left one-jaw impression trays formed in two parts in the median part are formed in different shapes and sizes, and the upper, lower, left and right two-jaw trays are respectively patterned. 2. The dental impression tray according to claim 1, further comprising a fixing device for fixing the plurality of trays together by attaching a portion. 3. The dental apparatus according to claim 2, wherein the fixing device for the upper, lower, left, and right trays comprises a spindle rod attached to each tray and a holder for fitting and holding these spindle rods. For impression tray. 4. The fixing device for the upper, lower, left and right trays comprises a semi-conical pattern attached to each tray, and charging means for abutting these semi-conical patterns and storing and fixing them as a conical pattern. The dental impression tray according to claim 2, comprising: 5. The fixing device for the upper, lower, left and right trays includes a dowel pin projecting from one surface of a handle piece attached to each tray and a single connection for fitting the dowel pin to fix the handle piece. And a member.
The dental impression tray as described. 6. The fixing device for the upper, lower, left and right trays has a handle attached to each tray, and a plurality of recesses and protrusions are formed at predetermined intervals on opposite sides of the handle and fitted together. The dental impression tray according to claim 2, wherein the dental impression tray is configured as described above. 7. A fixing device for upper, lower, left and right trays, wherein a handle is attached to each tray, and a plurality of recesses and protrusions are formed at predetermined intervals on opposite sides of the handle. 3. The dental impression tray according to claim 2, wherein magnetic materials having different polarities are embedded between the concave portions and the convex portions.