JP4171747B2 - Lip spreader - Google Patents

Description

  The present invention is mainly used for photographing the front teeth of upper and lower dentition, such as diagnosis / recording before and after orthodontic treatment such as tooth alignment, and color tone change before / after whitening, and when cleaning the oral cavity. When applying whitening materials, other lip spreaders used for dentistry and oral care, more specifically, easy attachment to and removal from the oral cavity and prevention of jaw fatigue during lip spread It relates to the lip spreader.

  For example, as shown in FIG. 8, the conventional lip spreader has a contact 1 provided with a pair of curved concave grooves 2, which is continuously connected by a slightly curved connecting rod 3. A downward projecting piece 5 is provided, and a thermosetting synthetic resin is used as a material and is molded by thermal processing using a mold.

  In use, the thumb and forefinger are applied to both contacts 1 to bring both contacts 1 closer together, the connecting rod 3 is inserted into the patient's mouth, and both fingers are released. When released, the concave grooves 2 of both contacts 1 are fitted to the patient's mouth edge, and the open state is continued. Further, the tip of the protruding piece 5 pushes the tongue downward to widen the space in the oral cavity. When completed, both contacts 1 are brought close to each other with both fingers, and the spreader is removed from the oral cavity of the patient (see, for example, Patent Document 1).

Microfilm of Japanese Utility Model No. 52-066332 (Japanese Utility Model Publication No. 53-161598) (Specifications, pages 1, 2 and 4)

  In the case of the conventional spreader, with the spreader inserted into the oral cavity, the lips are greatly opened or closed, the jaw position and the occlusal relationship are not constant and unstable, the jaw is fatigued, There is a problem that it becomes unbearable especially for a long time.

  Further, the connecting rod 3 is bent slightly forward, and even if the connecting rod 3 is located deep in the mouth and the protruding piece 5 pushes the tongue downward, the tongue protrudes forward from the protruding piece 5; It is dangerous because it may interfere with oral cleaning, and may damage the tongue with dental cutting tools during dentistry.

  In addition, the tongue may come into contact with the tooth surface, the tooth surface is contaminated with saliva, and the adhesiveness to the tooth surface such as a filler is deteriorated.

  Moreover, when the spreader is inserted into the oral cavity upside down, the projecting piece 5 does not act as a tongue presser, so the projecting piece 5 must be inserted downward into the oral cavity. Therefore, there is a problem that workability is poor.

An object of the present invention is to keep the above-mentioned points in mind and to make the jaw position and occlusal relationship constant and stable so that the jaw does not fatigue and can be used for a long time.
In addition, it prevents the tongue from protruding forward, facilitates oral cleaning, prevents damage to the tongue, prevents contact of the tongue with the teeth, and improves workability without requiring up-down selection. Objective.

In order to solve the above problems, the lips open拡具of the present invention, both the rear end of the insertion rod flat surface U-shaped, support forward via respective curved portion of semi-circular having an elastic the rod was continuously provided, said the front end of the two support bars, abut body groove that is curved to the rear surface each of which is formed a consecutively provided, on both sides of the insertion rod, to the left and right front and rear wide in the horizontal direction A plate-shaped occlusal body is formed (Claim 1).

  In addition, it is desirable to form a tongue protection plate in the vertical direction at the center of the insertion rod (Claim 2).

And it is preferable to form the upper and lower tongue protection plates in the upward and downward directions on the upper and lower surfaces of the central portion of the insertion rod, respectively (Claim 3).
Furthermore, it is desirable that the top and bottom and the left and right are symmetrical shapes.

Lips open拡具of the present invention, both the rear end of the insertion rod flat surface U-shape, and continuously provided a supporting rod forward via respective curved portion of semi-circular having elasticity, the two the front end of the supporting rod, abutting body curved and recessed groove is formed on the rear surface respectively was continuously provided, on both sides of the insertion rod, in order to form a wide horizontal plate-shaped bite member back and forth and left and right In use, the distance between the abutment body between the thumb and forefinger is fitted by an elastic curved part, the insertion rod is inserted into the oral cavity, the distance between both fingers is widened, and the back of the left and right abutment bodies is bent. It is easy to spread the lip by bringing the concave groove into contact with the left and right mouth corners.

  By inserting the left and right molars into the occlusal body on both sides of the insertion rod, the jaw position and occlusal relationship become constant and stable with the jaw almost closed, the jaw does not fatigue, and it can be used for a long time. You can endure (Claim 1).

  Further, by forming a tongue protection plate in the vertical direction at the center of the insertion rod, the insertion rod is a U-shaped plane, and the tongue protection plate at the center of the insertion rod is relatively front of the oral cavity, that is, both Located in the middle of both concave grooves of the contact body, the tongue is inside the tongue protection plate and does not protrude from the tongue protection plate, and damage to the tongue and adverse effects due to the tongue can be prevented (claim 2).

  Then, by forming a tongue protection plate in the vertical direction upward and downward on the upper surface and the lower surface of the central portion of the insertion rod, it is possible to more reliably prevent the tongue from protruding from the insertion rod (Claim 3).

  In addition, by making the top and bottom and left and right symmetrical, the lip spreader loses directionality, and it can be used either up or down without checking which side is up or down, and workability in a short time It can be worn well and can be worn even in a dark space.

The best mode for carrying out the present invention will be described with reference to FIGS. In each figure, the same code | symbol shows the same or equivalent thing.

Example 1 will be described with reference to FIG. 1 of a front view, FIG. 2 of a plan view, and FIG. 3 of a right side view.
6 is a U-shaped insertion hook which is a plane viewed from above, 7 is a semicircular arc-shaped curved portion having elasticity formed at both rear ends of the insertion hook 6, and 8 is a double curved portion 7. The support rods 9 are connected to the front ends of the support rods 9, 9 are contact members connected to the front ends of the support rods 8, and 10 is a curved concave groove 10 formed on the rear surface of the contact members 9. When the heel 6 is inserted into the oral cavity, both concave grooves 10 come into contact with the left and right mouth corners.

  Reference numeral 11 denotes a horizontal plate-shaped occlusion body which is formed on both sides of the insertion rod 6 and which is wide in the horizontal direction. When the insertion rod 6 is inserted into the oral cavity, the left and right molars are respectively left and right occlusion bodies 11 by occlusion. The jaw position is constant and stabilized in the occlusal state.

  Reference numeral 12 denotes an up-and-down tongue guard plate formed on the upper and lower surfaces of the central portion of the insertion rod 6, respectively, which is wide in the vertical and horizontal directions and has a rounded periphery. It doesn't hurt.

Furthermore, the lip spreader as a whole has a symmetrical shape in the vertical and horizontal directions.
In use, the distance between the two abutting bodies 9 between the thumb and the index finger is fitted by an elastic curved portion 7, the insertion rod 6 is inserted into the oral cavity, and the distance between both fingers is widened so The curved groove 10 on the rear surface is brought into contact with the left and right mouth corners to widen the lips. This task is simple and easy.

  By inserting the left and right molars into the occlusal body 11 on both sides of the insertion rod 6, the jaw position and the occlusal relationship become constant and stable with the jaw almost closed, the jaw does not fatigue, Can withstand use.

  In addition, since the upper and lower tongue protection plates 12 are formed on the upper and lower surfaces of the central portion of the insertion rod 6 in the upward and downward directions, respectively, the insertion rod 6 has a plane U shape and has a tongue at the center of the insertion rod 6 The protective plate 12 is positioned relatively in front of the oral cavity, i.e., in the middle of both concave grooves 10 of the both abutments 9, and the tongue is inward of the tongue protective plate 12 and does not protrude from the tongue protective plate 12. Tongue damage and adverse effects caused by the tongue can be prevented.

  And because the top and bottom and left and right are symmetrical, the lip spreader loses directionality, and you can use either top or bottom without checking which side is up or down, and work in a short time It can be worn well and can be worn in dark spaces.

  A second embodiment will be described with reference to FIG. In Example 2, the occlusal body 13 in Example 1 is thicker than the thickness of the insertion rod 6 in the vertical direction, and the vertical width is widened. In this case, the opening of the upper and lower teeth at the time of occlusion can be widened. Moreover, if several kinds of lip spreaders having different thicknesses of the occlusal body 13 are prepared and selected and mounted, it is convenient for changing the opening of the upper and lower teeth at the time of occlusion.

Reference Example 1 will be described with reference to FIGS. 5A, 5B, and 5C. In the first reference example , the left side U-shaped occlusal body 14 is detachably fitted from the front at the positions where the molar teeth on both sides of the insertion rod 6 are engaged in the first embodiment. In this case, it is thought to be mounting the bite member 14 of various thicknesses.

Reference Example 2 will be described with reference to FIGS. The reference example 2 is obtained by connecting the left and right occlusal bodies 14 to the front side of the insertion rod 6 with a coupling rod 15 positioned in parallel to the insertion rod 6 in the reference example 1 . In this case, the left and right occlusion bodies 14 can be easily attached and detached, the positions of the both occlusion bodies 14 are more stable, and the left and right occlusion bodies 14 are connected by the connecting rod 15, so that the size becomes large and may be accidentally swallowed. Absent.

It is a front view of Example 1 of the best mode according to the present invention. It is a top view of FIG. It is a right view of FIG. It is a front view of Example 2 of the best form concerning this invention. A is a front view of Reference Example 1 , B is a plan view of the occlusal body, and C is a cut left side view of the occlusal body portion of A. FIG. 10 is a front view of Reference Example 2. FIG. FIG. 7 is a plan view of FIG. 6. It is a perspective view of a prior art example.

Explanation of symbols

6 Insertion cage 7 Curved portion 8 Support rod 9 Contact body 10 Concave groove 11, 1 3 Occlusal body 12 Tongue guard plate

Claims (4)

Both the rear end of the insertion rod flat surface U-shape, and continuously provided a supporting rod forward via respective curved portion of semi-circular having an elasticity,
Wherein the front end of the two support rods, consecutively provided an abutment member curved the groove is formed on the rear surface, respectively,
A lip spreader characterized in that a wide horizontal plate-shaped occlusal body is formed on both sides of the insertion rod on the left and right and front and rear .   The lip spreader according to claim 1, wherein a tongue protection plate in the vertical direction is formed at the center of the insertion rod.   The lip spreader according to claim 1 or 2, wherein an upper and lower tongue protection plate is formed on the upper surface and the lower surface of the central portion of the insertion rod, respectively. The lip spreader according to claim 1, 2 or 3, wherein the upper and lower sides and the left and right are symmetrical shapes .

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