JP3874527B2 - Mounting base of plaster dentition model in articulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an articulator used for processing a crown restoration or a denture, and in particular, an upper plaster dentition model fixed to an attachment base of an upper jaw frame can be easily and without mechanical impact. The present invention relates to a mounting base for a gypsum dentition model in an articulator that can be quickly removed from the mounting base and can improve work efficiency and ensure high-precision occlusal adjustment while reducing the burden on the operator.
[0002]
[Prior art]
Conventionally, a gypsum dentition model used for processing and forming dental restorations, dentures, etc. is formed by pouring fluid gypsum into the impression of the upper or lower jaw of a patient and including the treatment tooth part of the patient. And the gypsum dentition model which opposes this is detachably fixed to the lower jaw and upper jaw frame of a pair of articulators.
[0003]
And when actually carrying out the processing of the crown restoration, denture, first check the occlusal state of the current upper and lower gypsum dentition model, then cut the plaster dentition part of the treatment tooth part with a precision saw, Occlusal with a gypsum dentition model that includes the treated dental part with the crown or denture of the required restoration applied to the gypsum dentition part of the detached treatment tooth part In general, a method of repeatedly performing correction and processing on the treatment tooth site as appropriate is employed so that the best condition is achieved.
[0004]
Here, in the conventional articulator used for the occlusal adjustment as described above, a pair of support columns are provided upright and spaced apart from each other on the rear part of the lower jaw frame on which the lower plaster dental model is mounted, and a shaft is interposed between the support columns. The fixed upper plaster frame is filled with a fixing plaster having a soft state, and the upper plaster dental model is fitted to the fixing plaster so that the upper plaster is inserted through the hardened plaster. Since the dentition model is fixed to the upper jaw frame, when the treatment tooth part is corrected and processed and the gypsum dentition model is removed, the worker uses a hammer to crush the fixed part with the upper jaw frame. In addition to the cumbersome work that imposes a burden on the instrument, not only the accuracy of the articulator, which is a precision instrument, is significantly reduced, but mechanical damage by a hammer is likely to cause damage to the plaster model. It was.
[0005]
Therefore, in recent years, a configuration has been proposed in which a gypsum dentition model is fixed to a mounting base that is detachably attached to the upper jaw frame, without directly fixing the gypsum dentition model on the upper jaw side to the upper jaw frame. Then, it is easy to attach and remove the plaster model from the upper jaw frame, but it cannot be removed unless mechanical impact force is still applied to the fixed part of the mounting base and the plaster model. The current situation is not a fundamental solution.
[0006]
[Problems to be solved by the present invention]
The present invention was devised in the process of research and development aiming at improving the function and workability of the articulator in view of the actual situation as described above, and the object is to have a simple and simple configuration. , The gypsum dental model attached to the mounting base via the fixing gypsum can be easily removed without giving mechanical impact, and the fixed gypsum dental model can be prevented from being damaged or damaged. It is an object of the present invention to provide a mounting base for a gypsum dentition model in an articulator that can maintain a high accuracy and work efficiency while minimizing the burden on the user.
[0007]
[Means for Solving the Problems]
In order to solve the problems, the technical means adopted by the present invention is that a pair of support posts are provided in a spaced-apart manner in the rear part of the lower jaw frame on which the lower jaw side plaster dental model is mounted, and the upper jaw side plaster dental row in articulator upper jaw frame for mounting through a universal mounting base detachably a model formed by axially supported to be vertically pivoted between each strut, a plurality of screws projecting downwardly from the mounting surface of the mounting base, the mounting A mounting nut interposed in the base is detachably mounted, and a fixing gypsum is filled between the mounting surface and the plaster dental model including the protruding portion of the screw, and the mounting nut is mounted. by retraction screw from the fixing in plaster of each screw through and is characterized by being configured to so that to leave the attachment base plaster dental cast with fixing plaster.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on an embodiment shown in the drawings. In FIGS. 1 and 2, reference numeral 1 denotes an articulator for detachably mounting upper and lower gypsum dentition models 2, 3. The articulator 1 is a lower jaw used also as a support for the lower gypsum dentition model 3. A pair of support columns 5 and 6 are erected on the frame 4 so as to be spaced apart from each other, and a connecting frame 7 extending rearward is integrally stretched between the support columns 5 and 6, and the top portions of the support columns 5 and 6. Concave grooves 8 are respectively provided in the side portions in the vicinity, and the upper jaw frame 9 can be pivoted up and down by inserting a pivot shaft 10 that pivotally supports the rear end side of the upper jaw frame 9 into the concave grooves 8 and 8. The articulator 1 is configured.
[0009]
Between the connection frame 7 and the back side of each column 5, 6, forward inclined support surfaces 7 a, 7 a are obliquely arranged, and the pivot shaft 10 of the upper jaw frame 9 fitted in the concave grooves 8, 8. Can be moved rearward along the bearing surface 7a, and the rotating shaft 10 is pressed to the reference fixed position in the grooves 8 and 8 by the urging force of the elastic members 11 and 11 including the leaf springs 11a and 11a. It comes to be energized.
[0010]
On the lower surface of the upper jaw frame 9, a mounting base 12 is removably screwed to a circular fitting portion 9 a with a knob screw 13, and the lower surface of the mounting base 12 is plastered via a fixing plaster 14. The dentition model 2 is fixed, and the gypsum dentition model 2 is moved up and down as the upper jaw frame 9 rotates up and down.
[0011]
In addition, 15 is an incisal guide pin that supports the rotation tip side of the upper jaw frame 9 between the lower jaw frame 4, 15 a is an elastic receiving plate of the incisal guide pin 15 provided at the tip of the lower jaw frame 4, and 16 is a connecting frame. 7 is an adjustment knob that is screwed to the center of the upper jaw frame 9 to adjust the lower limit position of the upper jaw frame 9. Reference numerals 17 and 17 denote bosses projecting downward in a fitting portion 9 a formed on the lower surface of the upper jaw frame 9, and perform positioning when the attachment base 12 is attached to the upper jaw frame 9.
[0012]
As shown in FIGS. 3A and 3B, the mounting base 12 has an insertion hole 18 for the thumbscrew 13 at the center, and a fixing nut 19 is coaxially embedded at the bottom. In addition, a bolt hole 20 and an insertion hole 21 having a smaller diameter than the insertion hole 18 are coaxially penetrated at positions separated from the insertion hole 18 in three directions, and a mounting nut 22 is interposed in the middle of each insertion hole 21. As shown in FIG. 3C, three fixing bolts 23 are previously protruded downward from the mounting surface 12a of the mounting base 12 through the insertion holes 21 and the mounting nuts 22 from the respective bolt holes 20. In this state, the mounting base 12 main body is detachably fixed to the upper jaw frame 9 by screwing the knob screw 13 and the fixing nut 18 in the insertion hole 18. Reference numerals 24 a and 24 b denote guide holes that engage with the bosses 17 and 17 of the fitting portion 9 a formed in the upper jaw frame 9.
[0013]
Since the present invention is configured as described above, the gypsum dentition model 3 on the lower jaw side is first fixed on the lower jaw frame 4 when processing and molding the treatment tooth site using the gypsum dentition model. Thereafter, the mounting base 12 in which the three fixing bolts 23 are protruded downward from the lower surface in advance is fixed to the upper jaw frame 9 via the knob screw 13 (FIG. 3C).
[0014]
Next, as shown in FIG. 4 (a), when the previously formed upper plaster dental model 2 is attached to the mounting surface 12a of the mounting base 12 via the fixing plaster 14 having a soft state, The fixing gypsum 14 including the protruding portion of each fixing bolt 23 is filled between the mounting surface 12a and the gypsum dentition model 2.
[0015]
When the fixing gypsum 14 reaches a predetermined hardening state, the current occlusion state of the upper and lower gypsum dentition models 2 and 3 is confirmed, and then the necessary cutting and processing are performed on the gypsum dentition portion of the treatment tooth site. And the restoration tooth part so that the occlusion of the plaster dentition model including the treatment tooth part to which the restoration is put on and the restoration of the dental restoration is best achieved. The correction and processing in are repeated as appropriate using the articulator 1.
[0016]
Thereafter, when the occlusal adjustment by the articulator 1 is completed and the gypsum dentition model 2 on the upper jaw side is removed from the articulator 1, the operator first attaches it by loosening the thumbscrew 13 of the upper jaw frame 9. When the gypsum dentition model 2 including the base 12 is detached from the upper jaw frame 9, and further, as shown in FIG. 4B, each fixing bolt 23 is screwed out from the fixing gypsum 14 from the upper surface of the mounting base 12, The mounting base 12 and the fixing plaster 14 are fixed only to the mounting surface 12a. In this state, the side of the mounting base 12 is tapped or the mounting base 12 is rotated in the axial direction with respect to the fixing plaster 14. By doing so, both members can be easily and easily separated.
[0017]
Therefore, since the mechanical impact by a troublesome hammer is not given at the time of loading / unloading operation of the plaster dental model 2, the articulator 1 can be carried out without inducing damage or damage to the plaster dental model or lowering the accuracy of the articulator 1. It is possible to efficiently and smoothly perform restoration processing of dental crown restorations and dentures.
[0018]
【The invention's effect】
In short, in the present invention, a pair of support posts are provided in the rear part of the lower jaw frame to which the lower jaw side gypsum dentition model is to be mounted so as to be opposed to each other, and the upper jaw side gypsum dentition model is detachably attached via a mounting base. In an articulator formed by pivotally supporting the upper jaw frame to be mounted between the columns so as to be pivotable up and down, a plurality of screws projecting downward from the mounting surface of the mounting base are provided with mounting nuts interposed in the mounting base. The fixing gypsum is filled between the mounting surface and the gypsum dentition model including the protruding portion of the screw, and the fixing gypsum inside each screw is fixed via the mounting nut. in screw retreat from, because you configured so that to leave the attachment base plaster dental cast with fixing gypsum, yet simple and simple construction, plaster teeth mounted via a fixing plaster mounting base Model machine Can be easily removed without impact, and can be used efficiently with the same articulator using different types of treatment for each patient. In this way, an extremely useful novel effect is achieved that the work efficiency can be improved and high accuracy can be maintained while minimizing the burden on the operator.
[Brief description of the drawings]
FIG. 1A is an overall side view of an articulator. (B) is a plan view of the same.
FIG. 2A is a side view of a lower jaw frame including struts. (B) is a plan view of the same.
FIG. 3A is an enlarged plan view of a mounting base. (B) is a cross-sectional view of the above. (C) It is a partial cross section side view which shows the fixed state of an attachment base and an upper jaw frame.
FIG. 4 (a) is a main part operation explanatory view showing a state in which a gypsum dentition model is fixed to an upper jaw frame via fixing gypsum. (B) is principal part action explanatory drawing which shows fixation with the upper jaw frame and the gypsum dentition model in the state which removed the fixing bolt.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Articulator 2 Upper gypsum dentition model 3 Lower gypsum dentition model 4 Lower jaw frame 5 Support column 6 Support column 9 Upper jaw frame 12 Mounting base 12a Mounting surface 14 Fixing plaster 23 Fixing bolt (screw)

Claims (1)

A pair of support posts are placed upright and spaced apart from each other on the rear part of the lower jaw frame to which the lower jaw side plaster model is mounted, and each upper jaw frame on which the upper side plaster model is mounted via a detachable mounting base. In an articulator that is pivotally supported between the columns so as to be pivotable up and down, a plurality of screws protruding downward from the mounting surface of the mounting base are detachably mounted via a mounting nut interposed in the mounting base. Then , the fixing gypsum is filled between the mounting surface including the protruding portion of the screw and the gypsum dentition model, and each screw is screwed out from the fixing gypsum through the mounting nut, so that the gypsum mounting base plaster dental cast in the articulator, characterized by being configured to so that you detached from the mounting base of the dental model with a fixed plaster.

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