JPH0323057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an occlusal and dentition formation reference device for reproducing the occlusal and dentition form in artificial tooth alignment or crown restoration of a complete denture or a local denture.

(Prior art) When creating dentures for dental defect restoration, a mold of the teeth is created using plaster based on the impression obtained from the oral cavity, and a check bite or occlusal ridge, commonly known as a wax mold, is used to obtain the relationship between the upper and lower jaws. The test piece made with this is placed inside the oral cavity and the positional relationship between the upper and lower jaws is taken. Next, using an occlusal plane plate (reference plate, commonly known as a template) set in the articulator, the jaw model is aligned based on anatomical indicators obtained from one jaw model or the inside of the oral cavity, and fixed with plaster. After hardening, the other jaw model is fixed using a check bite or the like, and similarly attached and fixed to the articulator using plaster. After this preparatory work, the process of creating dentures begins for one jaw at a time, and the alignment of the artificial teeth is done by a skilled dental technician or dentist using the template as a reference, taking aesthetics and occlusion into consideration.

In addition, when aligning the artificial teeth of a local denture, an impression is taken of at least the defective part and its surrounding area, and the jaw model is aligned in the same way as described above.

Furthermore, in the case of crown restoration (including partial prosthesis using metal or ceramics as well as denture formation using implants), the jaw model taken from the oral cavity is aligned one jaw at a time in the articulator using the above template, and then the template is used. Based on this, the occlusal dentition is formed.

(Problems to be Solved by the Invention) However, in the procedure for making dentures as described above, there is the inconvenience of having to attach and fix the jaw model to the articulator one jaw at a time. Another drawback was that if the occlusal plane, ie, the template, were to be misaligned, the jaw model had to be reattached because the template was fixed.

The present invention has been made in view of the above, and aims to eliminate the above-mentioned problems by making it possible to change the position of the template at will, and is a novel method that enables rapid and highly accurate artificial tooth alignment or crown restoration. It is an object of the present invention to provide an occlusal and dentition formation reference device.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the attached embodiment figures. Fig. 1 is a perspective view showing an example of the reference device of the present invention, The figure is a front view showing the usage state of the device, FIG. 3 is a vertical sectional view taken along the line -- in FIG. 2, FIGS. 4 and 5 are partially cutaway perspective views of other embodiments, and FIGS. 7 and 8 are perspective views and back views showing various aspects of the template employed in the present invention. That is, the occlusal and dentition formation reference device of the present invention is an occlusal and dentition formation reference device for reproducing the occlusal and dentition form in artificial tooth alignment or crown restoration of a complete denture or a local denture, and
Bracket 2 detachably attached to articulator 1
and a reference template 4 for forming an artificial tooth arrangement or occlusal tooth arrangement, which is detachably attached to the bracket 2 via a position adjustment mechanism 3, and the position adjustment mechanism 3 is attached to the articulator 1. The template 4 is characterized in that the position of the template 4 can be adjusted by moving forward, backward, left, right, and up and down to match the placed jaw model 5 or the anatomical index obtained from the inside of the oral cavity.

The template 4 is replaceably attached to the position adjustment mechanism 3 via a stopper 42,
As shown in FIGS. 6A, 6B, and 6C, it includes three types of surfaces that are statistically calculated and designed depending on the width of the dental arch in the patient's mouth or the occlusal style. The template 4 in Figure 6A is a curved plate with a curvature of 4 inches, the template 4 in Figure 6B is a curved plate with a curvature of 8 inches, and the template 4 in Figure 6C is a flat plate. Show each. These three types of templates 4 are selected in advance from observation of the patient's oral cavity during artificial tooth alignment, which will be described later. Further, the template 4 shown in FIG. 7 is an example of a split type, and is suitably used for occlusal dentition formation such as artificial tooth alignment of a local denture base or local crown restoration. Also,
Even in the case of complete dentures, the anterior teeth may not be arranged based on the same criteria as the molars from the viewpoint of aesthetics, and the template 4 shown in FIG. 7 is useful in such cases. Furthermore, in FIGS. 7 and 8, reference lines 41 are attached to both or one side of the template 4, and these reference lines 41 are preferably used as a guide when aligning artificial teeth, etc., as described later. Adopted.

(Operation) The procedure for arranging artificial teeth using the reference device having the above configuration will be briefly described. Figures 2 and 3 show the procedure for arranging the artificial teeth of a complete denture, in which a jaw model 5 taken from the oral cavity is fixed with plaster or the like on the mandibular model arch 11 of the articulator 1, while the upper jaw model is Bow 12 has the first
A reference device as shown in the figure is attached via the bracket 2, one of the templates 4 as shown in FIG. 6 is selected from the various templates 4 as shown in FIG. 3 to align the template 4 with the three anatomical markers on the jaw model 5 (based on the alveolar bone, etc., which is present near the anterior and molar regions of the jaw model 5 and have little change over time), and position the template 4 at its proper position. Establish. Next, a low ridge 6 made of wax or the like is attached to cover the alveolar crest 51 of the jaw model 5, thereby completing the preparation for artificial tooth arrangement.

After the preparations are completed as described above, the low ridge 6 is appropriately scraped off, and the artificial teeth 7 are sequentially placed in the scraped areas.
The rows are arranged by partially burying them and further hardening the row embankment 6. At this time, by bringing the cusp 71 of each artificial tooth 7 into contact with the lower surface of the template 4, and by using the reference line 41 as a guide, the appropriate position and orientation of each artificial tooth 7 is determined, and proper alignment as a whole is achieved. It will be done. When the artificial teeth of the lower jaw model 5 are properly aligned in this way, the articulator 1
Remove the bracket 2, position adjustment mechanism 3, and template 4 from the maxillary model arch 12, and remove the maxillary model arch 1.
An upper jaw model obtained by taking an impression from the oral cavity is placed in 2, and the artificial teeth are arranged based on the artificial teeth 7 properly arranged in the lower jaw model 5, thereby completing all arrangement.

The jaw model 5 with the artificial teeth arranged in this way is removed from the articulator 1, its surroundings are wrapped with an investment material, etc., the low ridge 6 is melted by the so-called lost wax method, and a denture base material (plastic, etc.) is injected into the melted space. ) is injected and hardened to complete the denture.

The so-called mandibular method has been explained above, but when adopting the maxillary method, the maxillary model arch 12 of the articulator 1
An maxillary model obtained by taking an impression from the oral cavity is installed, and a bracket 2 is attached to the lower jaw model arch 11, and the artificial teeth of the maxillary model are aligned using the template 4 in the same manner as described above, and the artificial teeth of the lower jaw model are aligned using this as a reference. Good.

In addition, when performing artificial tooth alignment for local dentures,
The position of the template 4 is set based on the non-prosthetic teeth of the jaw model taken from the oral cavity, and thereby the artificial teeth of the local denture are arranged in the same manner as described above.

Furthermore, when forming an occlusal dentition by crown restoration, the template 4 is set at an appropriate position in association with the jaw model, and the crown formation is performed so that the cusp crest of the tooth to be restored is in contact with this template 4. In this way, proper occlusion with the opposite jaw can be achieved quickly and accurately.

(Example) The present invention will be further described with reference to Examples below.

Embodiment 1 In FIG. 1, the bracket 2 consists of a substantially L-shaped member 20, and the bracket 2 is attached to the maxillary model arch 12 or the mandibular model arch 11 of the articulator 1 at both front and rear ends with screws 2.
1 and 22, it can be detachably attached. The L-shaped member 20 has dovetail means 201, 20
3 divided members 203, 20 connected via 2
4,205, and the left and right position of the central dividing member 204 can be adjusted by loosening the fixing screw 206. Further, a long hole 204' is formed in the central dividing member 204 along its longitudinal direction.
A support member 31 is supported in the elongated hole 204' so as to be slidable along its longitudinal direction, and the support member 31 can be adjusted in position forward and backward by a fixing screw 311. Further, the support member 31 includes a column 32.
is fitted with a fixing screw 321 so that its vertical position can be adjusted. A disk 33 whose axis is oriented in the left-right direction is fixed to the lower end of the column 32, and the disk 33
is the hollowed out portion 3 of the cylindrical pin 34 oriented back and forth.
The pin 34 is rotatably attached to the pin 41 via a shaft 331, and the relative inclination of the pin 34 can be adjusted by a fixing screw 332. Further, the pin 34 is pivotally supported by a template support member 35, and the left and right inclination of the support member 35 can be adjusted by a fixing screw 351. The template 4 is removably fixed to the lower surface of the support member 35 by a stopper 42, and the template 4 can be attached to the left/right, front/back, up/down position as described above,
The appropriate position of the template 4 can be arbitrarily set by a position adjustment mechanism 3 comprising means for adjusting the left and right inclinations and horizontal angles.

FIG. 2 shows the above-mentioned bracket 2 and position adjustment mechanism 3 attached to the articulator 1, in which the upper and lower jaw model arches 12 and 11 are pivoted at a fulcrum 13 that assumes a temporomandibular joint and can be opened and closed mutually. It is said to be free. Reference numeral 14 is a guide pin for maintaining a normal occlusal state.

Embodiment 2 In FIG. 4, a support member 31 is supported on a bracket 2 which has the same shape as the first embodiment but is not divided and is slidable along its longitudinal direction as described above. However, the support member 31 is divided into front and rear parts, and the left and right positions of one of the divided members 312 relative to the other part 313 can be adjusted by dovetail means 314 and fixing screws 315. In addition, this divided member 312 that can be slid left and right has a support 32 as described above.
is inserted into the support column 32 so that its vertical position can be adjusted by a fixing screw 321. A template support member 35 is held at the lower end of the support column 32 by a universal joint-shaped connecting means 36, and the support member 3
5 is the support member 35 by loosening the fixing screw 361.
The longitudinal and horizontal inclinations of the template to be fixed to the lower surface of the template can be adjusted at the same time. It should be noted that, among the constituent members of this embodiment, the parts common to those of the first embodiment are designated by the same reference numerals in the drawings, but their explanations will be omitted.

Embodiment 3 In FIG. 5, a bracket 2 is attached to a guide pin 14 with a fixing screw 23 so that its vertical position can be adjusted freely.
Further, a front and rear sliding rod 37 is held with respect to the bracket 2, and its front and rear positions are appropriately set by a fixing screw 371. Furthermore, a shaft rod 38 is slidably attached to the rear end of the sliding rod 37 so as to be perpendicular thereto.
The front and rear rotational positions and the left and right positions can be set arbitrarily by means of a fixing screw 381. A template supporting shaft 39 is pivotally attached to the rear end of the shaft 38, and the left and right inclination can be adjusted by means of a fixing screw 391. By means of the position adjustment mechanism 3 formed by these joints, the template 4 fixed to the shaft rod 39 can be freely adjusted in its front-rear, left-right, and up-down positions, as well as its front-rear, left-right inclination.

(Effects of the Invention) As described above, the occlusal and dentition formation reference device of the present invention has the template 4 articulator 1 by the bracket 2.
Since it is said to be removable, if you perform artificial tooth alignment on either the upper or lower jaw model, you can use this as a reference to align the artificial teeth on the other jaw model, as usual. There is no need to remove and attach the jaw model, and the troublesomeness of the work is significantly reduced. In addition, since the template 4 is configured such that its front-back, left-right, top-bottom position, front-back, left-right inclination, etc. can be arbitrarily adjusted by the position adjustment mechanism 3, the jaw model 5 is simply used as the articulator 1.
Proper occlusal conditions can be set quickly and accurately simply by placing the artificial teeth in the appropriate positions, thereby making it possible to align the artificial teeth extremely easily and accurately. The present invention, which has such remarkable effects, is extremely useful.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the reference device of the present invention;
Fig. 2 is a front view showing the device in use, Fig. 3 is a vertical sectional view taken along the line - - in Fig. 2, Figs. 4 and 5 are partially cutaway perspective views of other embodiments, and Fig. 6. , 7th
FIG. 8 is a perspective view and a back view showing various aspects of the template employed in the present invention. (Explanation of symbols) 1... Articulator, 2... Bracket, 3... Position adjustment mechanism, 4... Template, 5... Jaw model.

Claims (1)

[Scope of Claims] 1. An occlusal and dentition formation reference device for reproducing the occlusal and dentition form in artificial tooth alignment or crown restoration of a complete denture or a local denture, which is detachably attached to the articulator 1. Bracket 2 and Bracket 2
It consists of a reference template 4 for forming an artificial tooth arrangement or occlusal tooth arrangement, which is detachably attached to the position adjustment mechanism 3 through the position adjustment mechanism 3.
is characterized in that the position of the template 4 can be adjusted by moving forward, backward, left, right, and up and down to match the jaw model 5 placed on the articulator 1 or anatomical indicators obtained from the inside of the oral cavity. Occlusal and dentition formation reference device. 2. The device according to claim 1, wherein the template 4 is a spherical plate. 3. The device according to claim 1, wherein said template 4 is a flat plate. 4. The device according to any one of claims 1, 2, and 3, wherein the template 4 can be divided into front and back or left and right sides. 5. Claim 1, in which a reference line for confirming the position of the teeth is attached to both or one side of the template 4.
4. The apparatus according to any one of paragraphs 1, 2, 3, and 4. 6. The apparatus according to claim 1, wherein the position adjustment mechanism 3 is capable of adjusting the inclination of the template 4. 7 Claim 1, wherein the position adjustment mechanism 3 is capable of adjusting the horizontal angle of the template 4.
The device according to paragraph 2 or paragraph 2.