JPH074011Y2 - Denture fixed to the remaining teeth of the alveolar ridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a denture fitted in an alveolar ridge having residual teeth in the human oral cavity.

(Prior Art) Conventionally, in order to fit a denture having a predetermined artificial tooth fixed to a denture base to an alveolar ridge having residual teeth, a metal wire-like elastic clamp fixed to the denture base of the denture The denture is fixed to the denture base by sandwiching the residual tooth with.

The central part of the tooth of the alveolar ridge is a ridge whose circumference is larger than the circumference of the root of the tooth, so conventional clamps are fixed to the tooth by sandwiching the ridge with its elasticity. It was like this.

(Problems to be solved by the invention) However, since the conventional denture clamp clamps the ridges of the residual teeth by its elasticity, a force is applied to the residual teeth when the denture is attached to and detached from the residual teeth. Therefore, when the remaining teeth are loosened and swinging with respect to the alveolar ridge, there is a problem in that the attachment and detachment of the denture causes pain in the gums.
There is a problem that the life of the remaining teeth is shortened because the remaining teeth are shaken when the denture is attached or detached.

In view of the above problems, this invention can fix a denture to the residual tooth without external force being applied to the residual tooth when fixing the denture to the alveolar ridge using the residual tooth. It is intended to provide a denture fixing member.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a denture of the present invention comprises a support shaft provided on a metal base plate of a denture base at a rear portion from an insertion hole into which a residual tooth is fitted, A locking rod that is erected on the substrate in front of the insertion hole, a fitting cylinder that is fitted to the support shaft so as to be rotatable by a predetermined angle, and a front end that can be inserted into and removed from the locking rod. A fixing member formed of a stopper having an artificial tooth fixed to it and a retainer connecting the fitting cylinder and the stopper, and the fitting cylinder is covered with an artificial tooth that allows the stopper to rotate. When the denture is placed on the alveolar ridge and rotated to a position where the stopper plate engages with the locking rod, the retainer causes the residual teeth in the insertion hole together with the base plate to be rotated. It is characterized by gripping.

Example Next, an example will be described with reference to the drawings.

In FIGS. 1 and 2, a denture 1 having an artificial tooth 5 arranged and fixed at a predetermined upper position is mounted and fixed on a lower alveolar ridge A having a plurality of residual teeth ST, and its denture base 2 The upper layer portion 3 is made of a hard synthetic resin material as in the conventional case. In this denture base 2, a lower surface side of an upper layer portion 3 is a base plate 4 made of a thin metal plate, and a support shaft 6 is provided at a lower end of the base plate 4 at a position where an artificial back tooth 5a is provided in a front portion of the denture base plate 2. The part is fixed. The support shaft 6 is in the shape of a round bar, and a protrusion 6a is formed on the inner surface of the support shaft 6 in the vertical direction in parallel with the axis of the support shaft 6.

The fixing member 7 shown in FIG. 3 is attached to the support shaft 6, and at one end thereof, a cylindrical fitting cylinder 8 having a height lower than that of the support shaft 6 and loosely fitted to the support shaft 6 is provided. ing.
A vertical groove 8a is cut in the vertical direction of the fitting cylinder 8, and the width of the vertical groove 8a is slightly larger than the width of the protrusion 6a of the support shaft 6. Therefore, when the fixing member 7 is fitted to the support shaft 6 by aligning the vertical groove 8a of the fitting cylinder 8 with the protrusion 6a of the support shaft 6,
The fixing member 7 can rotate with respect to the support shaft 6 within a slight range.

The fixing member 7 is provided with a holding metal 9 on one end side of the vertical groove 8a of the fitting cylinder 8.
Is provided. This presser foot 9 is formed in a corrugated shape. When the denture 1 is placed on the upper part of the lower alveolar ridge A and the presser foot 9 is rotated clockwise in FIG. Each of the remaining teeth ST of A to ST is in contact with the outer surface of the tooth root portion.

A stopper plate 10 having a semi-arcuate cross section having a locking portion 10a at its tip is provided at the end of the presser bar 9 on the side opposite to the fitting cylinder 8. Then, one artificial front tooth 5B for the front tooth is fixed to the outer surface of the stopper plate 10.

In the fixing member 7 formed as described above, the fitting cylinder 8 is housed together with the support shaft 6 in the artificial posterior tooth 5A in the front part of the denture 1, and the base of the presser foot 9 is located in the artificial posterior tooth 5A. It penetrates through the provided vertical hole 5Aa.

The engaging rod 11 with which the clasp 10 of the fixing member 7 engages is the front portion of the denture 1 and faces the support shaft 6 with the insertion hole 14 formed for inserting the residual tooth ST of the lower alveolar ridge A interposed therebetween. It is erected on the substrate 4 at some point. The locking rod 11 has a semicircular cross section as shown in FIG. 4, and has a main body 12 whose height is slightly higher than the height of the stopper 10 and an upper end and a lower end of the main body 12. And a lower flange 13 having a pair of flanges 13 and 13 of a predetermined thickness having a radius larger than the radius of the semicircle of the main body 12.
Are fixed to the substrate 4.

The locking rod 11 is fixed to the front surface side of the base plate 4 with its front surface slightly acute at the angle where the vertical surface 12c of the main body 12 intersects the vertical plane including the center line C of the denture 1. A recess 15 is formed vertically in the substrate 4 on the rear edge 12b side of the locking rod 11.

Next, the attachment of the denture 1 to the lower alveolar ridge A will be described.

When the artificial tooth 5b at the tip of the fixing member 7 of the denture 1 is pulled forward,
As shown in FIG. 1, the presser foot 9 of the fixing member 7 is slightly separated from the front part of the denture base 2 to the front side. In this state, the denture 1 is inserted into the vagina, and the insertion hole 14 is fitted into the residual tooth ST of the lower alveolar ridge A, so that the denture 1 is placed on the lower alveolar ridge A.

Next, when the artificial tooth 5b of the fixing member 7 is pushed toward the denture base 2 direction, the retainer 9 inserts the residual tooth ST in the front part of the lower alveolar ridge A into the insertion hole.
14 while pressing against the rear wall portion 14a of the artificial tooth 5b, the locking portion 10a of the stopper plate 10 on the back surface of the artificial tooth 5b abuts on the main body portion 12 of the locking rod 11, and is slightly pushed by the elasticity of the stopper plate 10. After sliding on the outer peripheral surface of the main body 12 in the opened state, the rear edge of the main body 12
The denture 1 is fixed to the lower alveolar ridge A because it engages with 12b.

Next, when the denture 1 is removed from the lower alveolar ridge A, the artificial tooth 5b is pulled forward in the opposite manner to when the denture 1 is fixed. Since the engagement with 11 is released and the force of the retainer 9 of the fixing member 7 to press the remaining teeth ST of the lower alveolar ridge A is released, the denture 1 is easily removed from the lower alveolar ridge A.

In the above description, the case where the denture is attached to the lower alveolar ridge has been described, but it goes without saying that the case where the denture is attached to the upper alveolar can be performed similarly.

(Effect of the Invention) Since the present invention is configured as described above,
The following effects are achieved.

When fixing a denture to the alveolar ridge, after inserting the fixing member of the denture into the vagina with the fixing member open, rotate the retainer of the fixing member in the direction to press the remaining teeth of the alveolar ridge to form the denture. It suffices to engage the retainer clasp with the fixed locking rod, and when removing the denture from the alveolar, disengage the retaining rod fixed with the denture from the retainer clasp. Therefore, when attaching / detaching the denture to / from the alveolar ridge, no force is applied to the remaining teeth of the alveolar ridge as in the past.
The gums are prevented from causing pain and the remaining teeth are not shaken, so that the life of the remaining teeth can be extended.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a perspective view showing a denture and a lower alveolar ridge in the vagina, and FIG. 2 is an enlarged perspective view of a support shaft fixed to a denture base of the denture of FIG. Figures and 3 are the first
FIG. 4 (a) is an enlarged front view of the locking rod of FIG. 1, FIG. 4 (b) is a plan view of FIG. 4 (a), and FIG. 5 is a denture. It is a perspective view which shows the state which fixed to the lower alveolar ridge. 1 ... Denture 2 ... Denture base 4 ... Substrate, 5 ... Artificial tooth 6 ... Support shaft, 7 ... Fixing member 8 ... Fitting cylinder, 9 ... Presser plate 10 ... Clasp, 11 …… Locking rod 14 …… Insertion hole A …… Lower alveolar ridge ST …… Residual tooth, T …… Artificial tooth

Claims (1)

[Scope of utility model registration request] 1. A denture fixed to an alveolar ridge having residual teeth, a support shaft standing upright on a metal base plate of a denture base behind an insertion hole into which the residual tooth is fitted, and the insertion hole. A locking rod provided on the base plate at the front portion, a fitting cylinder fitted on the support shaft so as to be rotatable by a predetermined angle, and removable from the locking rod and an artificial tooth at the front portion. A fixing member formed of a fixed clasp and a retainer connecting the fitting cylinder and the clasp, and the fitting cylinder part covered with artificial teeth for allowing the clasp to rotate. , This fixing member prevents the retainer from gripping the residual tooth in the insertion hole together with the substrate when the denture is placed on the alveolar ridge and rotated to the position where the stopper plate engages with the locking rod. Denture fixed to the remaining teeth of the characteristic alveolar ridge.