JP2001276094A - Winged impression tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a patient to judge whether an impression tray pressed to the patient's dentition is inclined or not from outside the patient's mouth. SOLUTION: The impression tray is provided with a vane-like wing in place of a spatula-like handle with which the impression tray is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an impression tray with wings. By providing a wing-shaped handle, which is called a wing, on the impression tray, the degree of inclination of the impression tray in the oral cavity can be determined at a glance from outside the mouth.

[0002]

2. Description of the Related Art When a clay impression material is placed on an impression tray to obtain a patient's teeth, care must be taken to prevent the tray from coming into contact with teeth or gums. If it comes in contact with any part, the impression material at the contact part is lost, and it is impossible to obtain an accurate tooth model. Further, since the thickness of the impression material is reduced in the vicinity of the contact portion, when the tray is taken out from the mouth of the patient, the semi-cured impression material in the tray tends to peel off from the contact portion as a starting point. Therefore, conventionally, when inserting the impression tray into the oral cavity of a patient, the finger has pressed down the front, rear, left and right of the bottom of the tray so that the tray applied to the dentition is as parallel as possible to the occlusal plane. However, each time the bottom of the impression tray is pressed down with a finger, the glue-like impression material overflows from the bottom hole of the tray or the side hole provided in the side wall. At the end, the entire outside of the tray is covered with impression material, making the tray invisible. For this reason, the fact that the tray was parallel to the occlusal plane or not tilted up, down, left, or right had to rely to some degree on intuition.

[0003]

Therefore, the inventor of the present invention visually judges the degree of inclination of the tray in order to drastically improve the impression taking operation which has been overlooked for many years. After thinking about how to make it possible, I focused on the handle on the impression tray. That is, as shown in FIG. 4, the grips provided on the conventional impression tray 11 are spatula-sized enough to be picked by fingers. Therefore, even if the spatula-shaped handle 12 protruding out of the mouth of the patient is viewed, the degree of inclination of the tray in the oral cavity cannot be determined. Then, how can we use the handle to judge the tilt of the tray? This is the problem to be solved by the present invention.

[0004]

According to the present invention, a wing-shaped handle is provided in front of the bottom of the impression tray. I decided to call this wing handle a wing. The wing acts as an indicator to indicate the degree of tilt of the impression tray in the oral cavity. That is, when the impression tray is pressed against the patient's dentition, the inclination of the impression tray in the oral cavity can be quickly and easily determined by observing the wing-shaped wings that spread widely along the outside of the lips. For this reason, even if the tray body is not visible because it is covered with impression material overflowing from the bottom hole or side hole, operate while looking at the wing,
This ensures that the tray is mounted in the correct position parallel to the occlusal plane.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The impression tray with wings of the present invention is a wing formed by changing a conventional spatula-like handle to a wing-like handle. The shape of the wing is not particularly limited, and any shape may be used as long as it protrudes horizontally on both the left and right sides. It is desirable that the wing be integrally molded with the plastic disposable tray. However, even in the existing metal tray, a separately manufactured wing can be attached to the spatular handle.

[0006]

Embodiments will be described with reference to the drawings.
FIG. 1 is a plan view (A) and a side view (B) of an embodiment of an impression tray 1 with a wing for a lower jaw as viewed from a bottom surface. The wing 2, which is a wing-shaped handle, is about 7 cm in width and about 2 cm in length, and is integrally formed by extending the bottom surface 6 of the tray body 5 forward. A neck 3 having a width of about 2 cm and a length of about 15 mm is provided between the wing 2 and the tray body 5. By doing so, the inclination of the wing 2 and the inclination of the bottom surface 6 match, so whether the tray body 5 pressed against the patient's dentition is parallel to the occlusal plane, that is, the degree of inclination in the vertical direction Can be easily determined simply by looking at the wing 2 that is out of the mouth.

Further, a groove or a linear ridge is provided on the center line of the wing 2 to clearly show the midline 4. Thus, when the tray body 5 is not inserted straight into the oral cavity, the degree of inclination of the tray in the horizontal direction can be easily determined by using the front teeth of the upper jaw, the vertical groove of the upper lip, or the nose as a guide. Although not shown, the position and operation of the wing are the same in the upper jaw impression tray. Further, the conventional impression tray 1 shown in FIG.
1, a bottom hole 9 for overflowing the impression material and fixing it to the tray body 5 is provided on the bottom surface 6, and a lateral hole 10 is provided on the outer wall 7
Is provided. The inner wall 8 on which the patient's tongue rests may or may not be provided with a lateral hole.

[0008] When the impression tray 1 with wings of the above embodiment was experimentally manufactured and tested, it was confirmed that the impression tray 1 could be correctly mounted at the optimal position in the oral cavity of the patient as expected. Moreover, it has been found that the effect of the present invention is not only that, but also surprisingly, two more revolutionary effects are exhibited. That is, in a dental clinic where a large number of patients need to be treated in an efficient manner, it is not rare to leave impression acquisition to an assistant such as a dental hygienist. Even in such a case, the dentist must check whether the tray pressed against the patient's dentition is in the correct position. This is because if the impression material is hardened while the tray is tilted up and down and left and right and is in contact with the teeth and gums, the impression acquisition must be performed again. Therefore, even if the assistant inserts the impression tray into the patient's mouth even if another patient is extracting teeth, the dentist immediately raises his waist and looks into the impression taking patient's mouth, and the tray tilts. You must make sure that you have not. If it was tilted, it was necessary to wash the hands, adjust the pressing condition of the tray again, wash the hands again, and return to the extraction patient's chair. This is not only awkward for the dentist, but also less pleasant for patients who are left behind during tooth extraction. However, by using the impression tray with a wing of the present invention, the dentist can simply look at the wing 2 while sitting on a chair and continuing to extract teeth. Since the inclination of the impression tray 1 can be understood by looking at the wing 2, it is no longer necessary to stand up to the seat and look into the oral cavity of the impression-taking patient.

[0009] Even more fortunately, as another surprising advantage of the present invention, it has been found that it is very easy to remove the tray from the patient's mouth. That is,
When a tray on which a clay-like impression material is placed is pressed against the dentition to obtain a tooth pattern, the impression material comes into close contact with the teeth and pushes out air, resulting in a strong negative pressure. Therefore, when taking out the tray, conventionally, as shown in FIG.
Must be pinched with the thumb and forefinger, and the tray 11 must be shaken up, down, left and right to be stripped from the dentition. This requires considerable force, such that a red mark is left on the index finger applied under the spatula-like handle 12. However,
The wing 2 of the present invention can be pinched and held by three fingers, instead of being pinched with a fingertip. That is, although not shown,
The thumb hangs on the wing 2 close to the root, and the entire index finger and middle finger support the back of the wing 2. For this reason,
The tray can be easily removed from the dentition with very little force. Therefore, the labor required for the impression taking operation was remarkably improved.

In addition, by holding the wing 2 with three fingers, the impression tray taken out of the patient's mouth can be securely held with one hand. For this reason, when a gypsum is injected into the depression of the cured impression material to form a tooth mold, the injection of the gypsum is very easy. In addition, when tooth patterns of several patients are continuously obtained, when the number of hands is insufficient, the tray handle is inserted into the wall and held in the air.However, with the conventional spatula-shaped handle, the weight of gypsum cannot be withheld. It was not uncommon for the tray to fall off the wall. At this point, the wing 2 inserted into the wall never falls off. In the case of a non-disposable metal tray, the used impression material must be scraped off from the tray body after the production of the tooth mold, but the gripping force of the wing 2 is much better than the conventional spatula-shaped handle. This makes it very easy to remove the impression material that has hardened and stuck to the tray.

FIG. 2 is a side view showing another embodiment of an impression tray 1a with a wing for a lower jaw. The neck 3a is bent at a right angle to provide a step between the wing 2a and the bottom surface 6 of the tray body 5. By doing so, the work of peeling the tray main body 5 from the row of teeth is further facilitated by the principle of leverage. Therefore, the width of the wing 2a may be set to one index finger, that is, about 1 cm. When using the lower jaw impression tray without limiting to this embodiment, the clay-like impression material P is placed on the tray main body 5 on a heap, then turned over, and put over the lower jaw teeth as indicated by the arrow. And press it.

Assuming that the impression tray 1a pressed against the lower dentition as described above is cut at the first molar D, as shown in FIG. 3, the impression material pressed by the molar D and the gingiva. P overflows from the bottom hole 9 and the side hole 10 and covers the bottom surface 6 and the outer wall 7. However, even if the tray body 5 is hidden by the impression material P and cannot be seen, the wing 2a protrudes out of the patient's mouth. Therefore, by looking at the wing 2a, it can be easily determined whether or not the tray main body 5 is parallel to the occlusal plane. At that time, the corner angles M, M at both ends of the mouth are effective guides. That is, most of the patients have normal jaw bones, and the upper and lower lips have no distortion. Therefore, in a patient with a normal lip position, the mouth angle line L connecting the left and right mouth angles M, M can be regarded as a virtual reference line. Therefore, by checking whether or not the plane of the wing 2a coincides with the corner line L, it is possible to easily determine the degree of inclination of the tray body 5 in the vertical direction. If you get used to it, you can judge instantly just by moving your eyes up and down.

[0013]

As described above, the impression tray with wings according to the present invention has a conventional spatula-shaped handle with a wing-like wing, so that the tray can be tilted simply by looking at the wings protruding outside the mouth. Can be easily determined. For this reason,
Even if the tray main body becomes invisible due to being covered with the impression material, the impression tray can be correctly mounted in the oral cavity of the patient.

Further, it is not necessary to look into the oral cavity of the patient and visually check the inclination of the tray one by one as in the related art. For this reason, even when the dentist is busy and makes the assistant take an impression, it is possible to judge whether or not the assistant's work is appropriate only by looking at the state of the wing without standing.

Moreover, it is extremely surprising that when the impression tray is taken out of the patient's mouth, the wings are leveraged, so that the impression tray can be peeled off from the dentition with a very light force.
Further, since the gripping force of the wing is far superior to that of the conventional spatula-like handle, the operation of injecting gypsum into the impression and the operation of scraping off the cured impression material from the tray become very easy.

[Brief description of the drawings]

FIG. 1 is a plan view (A) and a side view (B) showing an embodiment of an impression tray with wings of the present invention.

FIG. 2 is a side view showing another embodiment of the winged impression tray of the present invention.

FIG. 3 is a cross-sectional view schematically showing a use state of FIG. 2;

FIG. 4 is a plan view showing a conventional impression tray provided with a spatula-shaped handle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Impression tray with wing 2, 2a Wing 3, 3a Neck 4 Midline 5 Tray body 6 Bottom 7 Outer side wall 8 Inner side wall 9 Bottom hole 10 Side hole

Claims (1)

[Claims] 1. An impression tray provided with a spatula-like handle,
An impression tray with wings, characterized in that wing-shaped handles are provided instead of spatula-shaped handles.