JP2013138752A - Artificial tooth having keeping mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial tooth used for a plate denture that is a dental prosthesis device in which the keeping effect with a denture base material is maintained without depending on the adjustment of a crown length diameter.SOLUTION: An artificial tooth has an internal structure that includes a support part d and a groove space e surrounding the support, and secures the mechanical keeping force for the denture base material without depending on the adjustment of an artificial tooth length diameter. That is, the efficiency improvement of denture making becomes possible such that the reworking of a through hole or the like can be suppressed to the minimal. Moreover, the contamination of the junction with the denture base material by a micro leakage is reduced by disposing a protrusion c in an artificial tooth outer peripheral wall distal end, and the aesthetic effect is reduced.

Description

The present invention relates to a ready-made artificial tooth used by arranging in a denture, which is a dental prosthesis device, or a ready-made artificial tooth used as an implant superstructure.

The ready-made artificial teeth include acrylic resin teeth that can be expected to be chemically bonded to the denture base material, and urethane-based hard resin teeth and porcelain teeth that cannot be expected to be chemically bonded. However, in the case of hard resin teeth and porcelain teeth that cannot be expected to be chemically bonded, there is a gap between the artificial tooth neck and the floor resin due to the shrinkage and deformation of the denture base material, so external forces due to repeated chewing, etc. As a result, the artificial tooth often falls off the denture base. In particular, the possibility increases when the crown diameter of the artificial tooth is adjusted to be short.

In addition, a gap between the artificial tooth neck and the denture base material may occur during use of the denture, that is, due to external force due to mastication or contraction or deformation of the denture base material. The food residue stagnating in the gap becomes a hotbed of bacteria, and the artificial tooth neck becomes a ring of black dirt, which not only inhibits aesthetics but also leads to diseases such as aspiration pneumonia hygienically.

For the bonding of ready-made artificial teeth and denture base materials, dentists and dental technicians cut mechanically maintained shapes into unique shapes, and then apply primer treatment and adhesives that can be expected to be chemically bonded This is a factor that greatly reduces work efficiency and reduces productivity. In the current situation where it is necessary to efficiently provide good dentures to patients, artificial teeth that reduce the burden on dentists and dental technicians are desired.

Japanese Patent Laid-Open No. 2001-268040 proposes an artificial tooth that has good adhesion to a denture base of various synthetic resins and does not fall off from the denture base over a long period of time even after repeated occlusion and mastication, and has esthetic properties. Has been.

However, chemical bonding alone has a low effect on occlusal force and denture deformation, and is due to polyamide nylon resin, nylon resin, nylon polyamide resin, and polyamide + acrylic mixtures that are widely used in recent years. The effect on denture base materials is considered to be low, and if the artificial teeth are not used after supplementary processing of the maintenance shape, there will be a problem that the artificial teeth will fall off. is there.

In Japanese Patent No. 3819717, the denture base material is not easily turned up, peeled off or damaged even if it is repeatedly subjected to mechanical action due to occlusal force such as mastication. There is an artificial tooth in which a through hole into which a denture base material flows is provided and a laterally recessed groove into which the denture base material flows in is provided on an outer peripheral side wall.

However, since the through hole is thin on the side surface of the small artificial tooth and it is difficult to form the concave groove on the wall surface, labor is required for formation. Usually, dentures place artificial teeth on the floor made of wax and replace it with denture base material. In the process, the wax is removed and replaced with floor material using steam cleaner or hot water. Work is essential. At this time, if the through hole is thin, wax may remain in the through hole, which adversely affects the maintenance of the artificial tooth. As the operation after wax removal (de-leakage), the denture base material is filled and injected, but it is difficult to ensure the inflow of the denture base material, and it is not possible to shorten the work time by the required efficiency. It can be said that it is difficult. In addition, in cases where the arrangement space for the artificial teeth is small, that is, in cases where the distance between the jaws is small, the crown diameter of the artificial teeth is often adjusted to be short, but even in this case, the through-holes cut into the artificial teeth are lost. The effect is not expected. Because the denture base material shrinks and deforms, a gap is created between the denture base resin and the artificial tooth. In addition to inhibiting, it has a negative effect on hygiene and is a factor leading to diseases such as aspiration pneumonia.

According to Utility Model Registration No. 3064138, an artificial tooth having a bottomed columnar hole on the base of the artificial tooth, and a protrusion is formed on the denture base by filling the columnar hole with a denture base material. The protrusions increase the adhesion area with the denture base, resulting in a mechanical reinforcing structure that prevents separation of the artificial tooth and the denture base. In this case as well, there is a space for arranging the artificial teeth. When the number is small, it is necessary to delete the base portion of the artificial tooth, so that effective columnar holes often disappear, and it is necessary to perform cutting again.

Artificial teeth having such maintenance holes are also commercially available, but since the through-holes are formed in artificial teeth with a small volume, the diameter of the through-holes is small and artificial due to lack of wax or gypsum separating material involved. In addition to causing tooth dropout, it is difficult to insert or inject denture base material, and practically, reworking is necessary to enlarge the through hole.

An example of artificial tooth processing is introduced in the Este Shot Technical Manual of Non-Patent Document 1, but the time required for this processing is a complete denture, and it is necessary to cut 28 artificial teeth It is a big burden in the production of dentures.

JP 2001-268040 Japanese Patent No. 3819717 Utility model registration number 3064148

Esthetic Shot Technology Manual iCast Co., Ltd.

The present invention improves denture base materials such as polyamide nylon, which is flexible and flexible and difficult to break, polycarbonate and polyester and acrylic resin with high strength and low discoloration, and improves mechanical maintenance, It is an object of the present invention to provide an artificial tooth that suppresses discoloration due to microleakage and reduces aesthetic disorders.

In order to solve the above-mentioned problem, a protrusion is provided at the joint of the artificial tooth outer peripheral side wall with the denture base material. It is possible to reduce the occurrence of microleakage by providing a protrusion at the tip of the outer peripheral side wall.
In addition, by providing a column part inside the artificial tooth and providing a circumferential groove around the column, it is possible to secure a wide adhesion area with the denture base material, resisting the side stress of the artificial tooth and It improves the mechanical maintenance force with the denture base material.

The tip of the outer peripheral side wall of the artificial tooth is the cervical part of the artificial tooth, which is the joint with the denture base material, but the patient who is the user feels the most uncomfortable when aesthetic disorders occur due to denture contamination. Part. The tip part is provided with a sloped protrusion on the tip on the outer wall side to enhance the effect of denture base material for covering artificial teeth and to reduce the formation of a gap with the denture base material. To alleviate disability.

Similarly, when the artificial tooth of the present invention is used as an implant superstructure, it is possible to maintain a high adhesive force between various synthetic resin materials as a medium for joining the implant abutment and the artificial tooth. It is possible to reduce cervical aesthetic disorders.

The support | pillar part inside an artificial tooth may be a cavity, and may be the same length as an artificial tooth outer peripheral side wall, or it may be shorter or longer than it. Moreover, it is also possible to give unevenness to the side surface of the support column. When the artificial tooth arrangement space is small, it is necessary to adjust the length of the artificial tooth to be short.However, even if this post is cut with the outer wall, it is possible to ensure the maintenance of the denture base material. On the other hand, it is possible to further improve the maintenance force of the artificial tooth with respect to the denture base material by drilling in the vertical direction. It is possible to reduce the burden of excision processing and drilling processing for adjusting the long diameter by making the support column hollow.

Further, when the artificial tooth of the present invention is used, the artificial tooth base is structured so as to be sandwiched between the denture base materials. Therefore, auxiliary drilling for improving the maintenance force may be performed only on the support column. It does not reach the outer peripheral side of the tooth and is aesthetically advantageous. When used in the injection method, a slit is provided on the base surface of the artificial tooth to assist the reliable filling of the denture base material.

  The artificial tooth according to the present invention has an internal structure having a column portion and a groove space around the column, and ensures a mechanical maintenance force with respect to the denture base material regardless of adjustment of the length of the artificial tooth. In other words, it is possible to improve the efficiency of denture production by minimizing the reworking of through holes and the like. Further, by providing a protrusion at the tip of the outer peripheral wall of the artificial tooth, contamination of the joint with the denture base material due to microleakage is reduced, and the aesthetic influence is reduced.

It is sectional drawing of a molar part implementation shape. It is an enlarged view of the projection part in sectional drawing of a molar part implementation shape. It is a tooth side view of Example 1 which is a 1st molar shape, a mesial surface, and a centrifugal surface. 1 is a front view of Example 1. FIG. 2 is a rear view of Example 1. FIG. 1 is a bottom view of Example 1. FIG. It is a side view at the time of processing a slit in Example 1. FIG. It is sectional drawing which has arrange | positioned Example 2 which is a front tooth implementation shape to denture. It is a side view in the case of processing a slit in Example 2. It is sectional drawing of Example 3 which is a molar shell-shaped artificial tooth. It is sectional drawing which has arrange | positioned this invention product to dentures. It is sectional drawing of Example 4 which is a molar part implementation shape. It is a right view of Example 4. 10 is a front view of Example 4. FIG. 6 is a bottom view of Example 4. FIG. It is a left view of Example 4. It is a rear view of Example 4.

aOuter peripheral side wall
b Tip of outer peripheral side wall
cProtrusion part
d prop
e Groove
f Center hole
g Outer shaft surface
h Base surface
A Crown length adjustment position
B strut drilling position
C slit machining position
D Drilling position 1 molar artificial tooth 2 anterior artificial tooth 3 denture base

Embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to an Example.

The structure of the artificial tooth (1) of the present invention comprises an outer peripheral side wall (a) and a support column (d) shown in the cross-sectional view of FIG. 1, and a groove (e) is formed around the support column (d). Yes. The support column (d) may have a central hole (f). Further, the outer peripheral side wall tip (b) has a protrusion (c), and the protrusion (c) is formed on the entire outer peripheral side wall tip (b) of the artificial tooth.

As shown in FIG. 2, the protrusion (c) of the outer peripheral side wall tip (b) of the present invention is formed at an angle of 2 to 98 degrees with respect to the outer shaft surface, particularly preferably 40 to 75 degrees, The height from the basal plane of the protrusion is set to 0.25 mm or more in the outer axial direction. Further, the length of the maximum portion of the protrusion in the basal plane direction is preferably 0.5 mm to 1.5 mm. The shape of the protrusion is arbitrary, and there may be a plurality of protrusions in the basal plane direction. In that case, it is preferable that the outer surface of the protrusion is parallel to the outer shaft surface.

Although the artificial tooth (1) of the present invention includes a support column (d), it can be used after being cut along the broken line (A) shown in FIG. Further, the support column (d) may have a central hole (f) in the case of molars that can secure the volume of artificial teeth, and may not have a hollow structure in the case of anterior teeth or premolars that cannot secure the volume. Good.
When the artificial tooth long diameter is cut and used along the broken line (A) on the outer peripheral side wall of the artificial tooth, the column (d) is also cut, but the column (d) has a broken line (B) depending on the long diameter. It is possible to further enhance the maintenance effect by perforating a dentist or dental technician in a portion corresponding to.

The structure of the groove part (e) and the central hole part (f) of the artificial tooth (1) of the present invention facilitates removal of the wax at the time of denture preparation, and further entraps bubbles during filling or injection of the denture base material. A round structure that reduces this is preferable. The denture base material may be a heat-curing resin for a denture base, a room-temperature polymer resin for dental use, a heat-polymerization resin for a crown, a hard resin for a crown, or a composite resin.

The artificial tooth of the present invention ensures mechanical maintenance by the sandwiching effect of the denture base material (3) as shown in FIG. When chemical bonding is used in combination, an adhesive primer or adhesive is applied to the entire surface of the artificial tooth outer peripheral side wall tip (b), protrusion (c), or strut (d) to create a denture base material for artificial teeth. It is also possible to reinforce the adhesive strength.

When a further maintenance effect is expected for the artificial tooth of the present invention, as shown in FIGS. 7 and 9, one or several through-holes and slits are processed and used on the outer peripheral side wall (a) of the artificial tooth. It is also possible to do.

Moreover, as shown in FIGS. 12 to 17 as Example 4, the artificial tooth of the present invention secures a wider adhesion area with the denture base material by giving a protrusion to the support, and enhances the entrainment effect. The adhesive strength with the denture base material can be increased.

The artificial tooth of the present invention is not limited to the configuration of the above-described embodiment. As shown in FIG. 10, in the molar portion, the strut portion (d) is set to be about 1/3 of the internal cavity. The shape can be changed.
By using the shell-like structure, when the artificial tooth of the present invention is used as an upper structure of an implant, it is possible to cover the implant fixture at an arbitrary position, and it is easy to establish a pairing relationship.

The shape of the artificial tooth of the present invention is not limited to the shape of the front tooth portion and the molar portion.

The shape of the artificial tooth that harmonizes with the average articulator's road is the need to adjust the meshing with an artificial tooth that has an anterior tooth incision, a canine cusp and a molar occlusal surface prepared to harmonize with the average articulator This refers to an artificial tooth that has no or little meshing preparation and can be applied to the majority of denture patients. An articulator reproduces a patient's jaw movement and occlusion on a model made from an impression obtained from the oral cavity.

Hereafter, the method of using the artificial tooth of this invention is shown.

A dentist or dental technician makes a wax levee made of a resin plate and wax on a plaster model made from an impression of a chin ridge taken from the oral cavity of a patient by a dentist. This wax bank is a stage before placing artificial teeth. Next, the dentist will try this wax wall into the patient's mouth, the patient's mouth information, i.e., the patient's maxillary and mandibular distance, occlusal plane, median position, lip position, mouth angle position, etc. Extract various information necessary for the placement of artificial teeth. Thereafter, the dentist or dental technician attaches the wax embankment on which such information is marked to an articulator that simulates the movement path of the jaw of a living body.

The dentist or dental technician arranges the artificial teeth against the wax embankment attached to the articulator and prepares a temporary denture that is not the final material other than the artificial tooth part called the wax denture. . Since the patient-specific information is marked on the wax bank, the artificial teeth are arranged with reference to the information, but there are cases where the ready-made artificial teeth can be used as they are or not. is there.

If it can be used as it is, it can be used without processing the artificial tooth of the present invention. However, when the patient's jaw condition, that is, the distance between the upper jaw and the lower jaw is small, the major axis of the artificial tooth of the present invention is shown in FIG. It will be used after being cut short at the position of the broken line (A). In some cases, the dotted lines shown in FIGS.

When the arrangement of the artificial teeth is completed and a temporary denture that is not the final material other than the artificial teeth is completed, the dentist will put it in the patient's mouth and adjust it to see if it matches the patient There is also a case.

After the adjustment of the temporary denture is completed, the temporary material other than the artificial tooth is replaced with a denture base material such as acrylic resin, polyamide nylon resin, nylon resin, nylon polyamide resin or polyamide + acrylic mixture. A split mold is made using a metal or resin mold and gypsum that can be divided into two dentures.

When the split mold is completed by burying the temporary denture in the mold with plaster, the metal or resin mold is immersed in boiling water to soften the temporary denture wax.

The metal or resin mold is opened and the wax is taken out in one lump. However, since the wax is attached around the artificial teeth, it is necessary to remove the wax with hot water or steam. Insufficient wax removal can cause artificial teeth to fall off. The central hole (f) of the artificial tooth of the present invention has a round shape that is advantageous for dewaxing.

After the dewaxing is completed, the preparation material for replacing the denture base material is completed by applying the separating material of the plaster and the denture base material to the split plaster surface.

After the selected denture base material is filled or injected and pressed and cured by a predetermined method, the denture is dug out from the split mold. The dentures that have been dug out are polished, re-attached to the articulator, and the occlusal adjustment is performed to complete the technical operation. After that, a denture that is mounted in the oral cavity and adjusted and the artificial tooth is reliably maintained is completed.

The artificial tooth of the present invention can be effectively used in dentistry because it maintains the mechanical maintenance force between the artificial tooth and the denture base material, reduces the occurrence of microleakage, and reduces contamination of the joint.

Claims (6)

Artificial tooth used for dental prosthesis devices including implants and overdentures, with an internal structure consisting of a strut and a groove around the strut, ensuring the maintenance force for denture base materials regardless of the adjustment of the artificial long axis diameter Single-layer or multilayer artificial teeth. 2. The artificial tooth according to claim 1, wherein the artificial tooth is used in a dental prosthesis device including an implant overdenture and has a protrusion on the distal end portion of the outer peripheral side wall. The shell-like artificial tooth according to claim 1, which is used for a dental prosthetic device including an implant overdenture. It is an artificial tooth used for an implant superstructure, and it has an internal structure consisting of a strut part and a groove part around the strut, and has a single-layer structure that ensures a maintenance force for a denture base material regardless of adjustment of the artificial tooth long diameter or Multi-layer artificial teeth. The artificial tooth according to claim 4, wherein the artificial tooth is used for an implant superstructure, and a protrusion is provided at a distal end portion of the outer peripheral side wall. The single layer according to any one of claims 1 to 5, which has a cutting edge shape, a cusp shape, and an occlusal surface shape that accord with the movement path of an articulator with an average value of a sagittal condyle inclination angle of 25 degrees and an incisal inclination angle of 10 degrees. Artificial tooth of structure or multilayer structure.