WO2008040276A2 - Base plate - Google Patents

Abstract

The present invention relates to a base plate (15) for production of a bite template (17) and/or for arrangement of prosthetic teeth. The present invention further relates to a support post (1), in particular for supporting and/or fixing the base plate (15) according to one of Claims 1 to 9. The present invention further relates to a method for producing a tooth prosthesis. The present invention further relates to the use of a support post (1) according to one of Claims 10 to 15 for supporting and/or fixing a base plate (15) according to one of Claims 1 to 9, particularly in the mouth of a patient.

Description

 description

baseplate

The present invention relates to a base plate for producing a bite template and / or for a set up of denture teeth.

In the manufacture of dentures, in particular for the production of a completely new dentition for a patient with a toothless or partially edentulous jaw with simultaneous use of implants, it is known from the prior art that the dentist first with the aid of a Kieferabdrucklöffel a first impression of the jaw, which is already provided with at least one implant takes, and in accordance with this first impression of the dental technician can create a model. Subsequently, the dental technician makes a basis This model forms a bite template by first forming a so-called base plate over the mandibular arch of the model, which fits snugly on the mandibular arch. Subsequently, a bite wall made of wax instead of the originally existing teeth is placed on the base plate.

This bite template from base and bite wall is handed over to the dentist, who now places the bite template on the patient's edentulous or partially edentulous arch. The patient now has the task of biting on the bite template used to press on the bite wall an impression of the corresponding teeth of the opposite jaw or possibly a bite template in the opposing jaw. Subsequently, the bite template is removed from the mouth of the patient and in turn handed over to the dental technician. This inserts the opposing jaw into the preserved dental impressions of the bite wall.

The disadvantage of the procedure described above and the bite templates known from the prior art consists in particular in the fact that when the patient bites at the final bite with inserted bite template, the bite template is often displaced. This inevitably leads to faulty bite marks in the bite wall, which in turn leads to a non-exact preparation of the prosthesis.

The object of the present invention is to overcome the disadvantages of the prior art.

This object is achieved by a base plate for producing a bite template and / or for a list of prosthetic teeth, which is characterized in that it is firmly fixed to at least one implant located in the mouth of a patient.

Due to the fixability of the base plate according to the invention in the mouth of a patient, in contrast to a bite template carried purely gingivally, It is sufficient that when clenching the jaw at the final bite no longer can shift the bite template in the patient's mouth. This avoids that prostheses are made on the basis of faulty bites, which ultimately do not fit and must be discarded.

In a preferred embodiment of the base plate according to the invention this is screwed with at least one implant located in the mouth of a patient. This has u.a. the advantage of a particularly firm and exact fit e.g. a bite template in the mouth of a patient.

In a preferred embodiment of the base plate according to the invention, this has a number of recesses corresponding to the number of implants in the mouth for passing through fastening means, in particular for performing support posts and / or screws. Through these recesses in the base plate according to the invention, these can be fixed in a simple manner in the patient's mouth by, for example, screws are guided in conjunction with Abstützpfosten through the recesses and screwed into the implants.

Particularly preferably, the base plate according to the invention is assigned at least one support post for supporting and / or fixing the base plate, which comprises a channel for passing through a screw and a substantially conical section. This Abstützpfosten is fixed to an implant in the patient's mouth. This is usually done by a screw is passed through the channel of the Abstützpfostens and bolted to the implant. The Abstützpfosten is fixed in the mouth, that the conical portion tapers upwards, that is in the opposite direction of the supporting jaw. The conical section of the support post serves to compensate for the differences (different positions) of the implants located in the patient's mouth. These differences inevitably arise due to the bone structure of the jaw. Preferably, a second section of the support post has a connection region for the positive connection with an implant. This connection region may comprise, for example, a hexagon or octagon. By means of this connection region, it is achieved that the support post can be fitted exactly into an implant before the final fixation.

Advantageously, the connection region of the second section of the support post is at least partially designed as a male part for insertion into the implant (female part). This has the advantage that an exact fit of the support post in the implant can be determined.

Advantageously, the Abstützpfosten consists essentially of metal.

As a rule, the base plate essentially consists of a hardenable plastic. In a special embodiment of the base plate according to the invention, this has at least one bite wall and can be used as a bite template.

In a further embodiment of the base plate according to the invention, this has a list of prosthetic teeth. In both cases (use as a bite template or use as a base plate for a set of denture teeth), the essential advantage is that the base plate can be fixed in the patient's mouth and thus a displacement of the same can be avoided during biting.

By fixing the base plate in the mouth (eg base plate of a bite template), a model analysis is also carried out at the same time. This means that in the event that the bite template in the mouth does not experience the exact same seat as on the model, from a delay of the impression taking is assumed. In this case, a new impression should be taken to rule out later corrections.

The present invention further relates to a Abstützpfosten, in particular for supporting and / or fixing the base plate according to one of claims 1-9, which by a conical portion and a channel for performing a Screw is marked. Through the channel in the Abstützpfosten invention, this can be fixed by means of a screw on an implant located in the mouth of a patient. The conical section serves, as already explained above, primarily to compensate for differences in the implants.

Advantageously, the Abstützpfosten invention has a second, a support surface for a base plate forming portion. By this support surface, for example, excessive pressure of the base plate is prevented on the patient's jaw. As a result, a pressure pain during biting, for example, in a final bite, can be prevented.

Advantageously, a second section of the support post according to the invention has a connection region for the positive connection with an implant. This has the advantage that an exact fit of the support post in an implant can be achieved and determined.

Advantageously, the connecting region of the second section of the supporting post according to the invention is designed as a male part for accommodation in an implant (female part). This has the advantage that a positive fit of the support post in the implant can be achieved and detected particularly well.

Preferably, the post according to the invention is associated with a screw. This screw is used to fix the Abstützpfostens on and / or in an implant.

Preferably, the Abstützpfosten invention has an internal thread. This internal thread serves primarily as a mating thread of the above-mentioned screw for fixing to and / or in an implant. The present invention further relates to the use of a support post according to the invention for fixing and / or supporting a base plate according to one of claims 1 to 9 in the mouth of a patient.

The present invention further relates to a method for producing a dental prosthesis, which is characterized by the following working steps:

a) Taking an initial impression of the jaw (upper or lower jaw) using a jaw impression tray; b) production of a model with integrated manipulatory implants according to the first impression; c) screwing Abstützpfosten, in particular according to one of claims 10 to 15, on the manipulation implants of the model; d) producing a bite template on the model by first a base plate made of soft, curable material on the mandibular arch of the model is formed so that it fits snugly on the jaw, which in this case holes are drilled in the base plate in the region of the support posts; e) molding at least one bite wall onto the base plate; f) removing the finished bite template from the model and fixing it in the patient's mouth; g) final bite in the patient's mouth; h) Placing prosthetic teeth on the basis of the bite marks in the at least one bite wall.

As a rule, the base plate is hardened, sanded and smoothed before the formation of a bite wall on the bite plate (before step e)). Following this, the base plate is screwed onto the model before step e) (forming at least one bite wall) is performed. When raising a bite wall, which is usually waxed with the base plate, Care must be taken to ensure that the screws with which the support posts have been screwed onto the analog manipulants are exposed.

When fixing the base plate in the mouth, for example, the procedure can be such that the base plate is first placed in the patient's mouth, that the recesses of the base plate in the region of the implant of the patient lie and then the Abstützpfosten be guided through the openings in the base plate and be fixed by screws on the implants in the patient's mouth.

Preferably, however, for fixing the base plate in the mouth first the Abstützpfosten, in particular Abstützpfosten according to one of claims 10 - 15, screwed into the implants in the patient's mouth and the base plate is attached to this. This has the advantage that the gums of the patient when screwing the Abstützpfosten can not be trapped in the implants, as may be possible in the aforementioned case.

In a further preferred embodiment of the method according to the invention, the prepared denture teeth are placed on the base plate freed of wax and the base plate is then fixed again in the patient's mouth for bite control by the Abstützpfosten. This has the advantage that slippage of the base plate in the patient's mouth is excluded even in the final control with base plate with raised denture teeth.

Further features of the invention will become apparent from the following description of preferred embodiments of the invention in conjunction with the drawings and the dependent claims. In this case, the individual features can be implemented individually or in combination with each other.

In the drawings show:

Figure 1: a Abstützpfosten invention (side view); Figure 2: model with screwed Abstützpfosten;

Figure 3: the model of Figure 2 with molded base plate;

Figure 4: finished bite template with Abstützpfosten and wax walls.

Figure 1 shows a Abstützpfosten invention 1 with a conical section 2 and a channel 3 for passing a screw 4. Both the Abstützpfosten 1 and the screw 4 are made of metal. The screw 4 is screwed for fixing the Abstützpfostens 1 in an implant, not shown here. The screw 4 may protrude after being screwed into an implant from the Abstützpfosten 1 or sunk in this.

The Abstützpfosten 1 further comprises a second portion 5, which has a parallel to an end face of the screw 4 surface 6. This surface 6 acts as a support surface for a base plate, not shown here, e.g. a bite template. The conical section 2 has the shape of a top cut-off cone. The conical section 2 is permanently connected to the second section 5. Both sections are welded together.

The legs 2a of the conical section 2 close with the screw 4 an angle α of about 11 ^c .

The second section 5 has an annular element 8. This annular element 8 has the abovementioned support surface 6. The annular element 8 is permanently connected via a connecting piece 9 with an octagon 10. The annular element 8 is open at the bottom (in the direction of the octagon) and forms a receiving region 11 for an implant. Due to the ring shape of the element 8, the support surface 6 also has a circular shape. The connecting piece 9 has an internal thread (not shown here), which serves as a mating thread for the screw 4.

When fixing the Abstützpfostens 1 on a (not shown here) implant is usually proceeded as follows. First of all, the support post 1 so placed on an implant that the Außenachtkant 10 is positively received in an inner octagon of the implant. In this case, the Abstützpfosten 1 slides into the implant and in turn in turn receives the upper portion of the implant in its receiving area 11 in a form-fitting manner. This positive fit of the Abstützpfostens 1 on the implant is easily recognized by the dentist and signals this, that the Abstützpfosten 1 sits exactly on the implant. The positive fit of the support post 1 is given when the lower edge 12 of the receiving area 11 is seated exactly on an upper edge of the implant.

If a positive fit of the support post 1 on the implant given, the Abstützpfosten 1 is fixed by means of the screw 4 by screwing into the implant.

FIG. 2 shows a model 13 with four screwed-in support posts 1 according to FIG. 1. In this case, the support posts 1 are partially embedded in plastic compound 14, which is intended to imitate the gums of a patient. As shown in FIG. 2, the second section 5 of the support posts 1 is surrounded by plastic mass 14 up to the support surface 6. However, the support surface 6 is free of plastic compound 14 and concludes with this. However, the conical portions 2 protrude out of the plastic mass 14 of the model 13.

The model 13 has manipulation implants (not shown here). To fix the Abstützpfosten 1 these are screwed by means of screws 4 in said manipulation implants. These manipulation implants correspond to the implants located in the patient's mouth and have the same positions relative to each other.

In this model with unscrewed Abstützpfosten 1 a curable plastic material for the production of a base plate is applied for the preparation of a bite template in the next step (see more detail on Figure 3).

FIG. 3 shows the model 13 of FIG. 2 with a base plate 15 made of hardenable synthetic material. This base plate 15 was produced in such a way that it depends on the model. dell 13 of Figure 2, first, the necessary for the preparation of the base plate 15 plastic material was formed so that it occupies a snug fit on the mandibular arch of the model 13. In the process, round holes 1616 are punched into the base plate 15 in the region of the support posts 1 with screws 4.

The base plate 15 is prepared so that the Abstützpfosten 1 are completely embedded in the material of the base plate 15. Only the screws 4 project out of the base plate 15. After the ideal shape of the base plate 15 is reached, this is cured. This is done for example by UV radiation, IR radiation, heat, etc .. After curing, the base plate is sanded and smoothed. Subsequently, the base plate is screwed back onto the model 13. On the base plate 15 bite walls are now raised from wax (see comments on Figure 4).

FIG. 4 shows a finished bite template 17 with wax walls 18. The bite template 17 shown was produced on the basis of the model 13 from FIGS. 2 and 3, respectively. The bite template 17 has holes 16 in its base plate 15. In these holes are the Abstützpfosten 1, which are completely surrounded by the material of the base plate 15. Only the outermost upper edge of the conical sections 2 of the support posts 1 can be seen. In the Abstützpfosten 1 (Fig. 1) are screws 4 for fixing the bite template in the mouth of the patient. To fix the bite template 17 in the patient's mouth, the support posts 1 are screwed to the implants in the patient's mouth with the aid of the screws 4. For final bite the patient bites on the bite template 17 and the dentist receives impressions of the opposing jaw on the wax walls 18.

It will be understood that the invention includes numerous other implementations besides those shown. Thus, the octagon 10 of Figure 1 can also have all conceivable other shapes. The shape of this element is determined by the shape of the implant, which serves as a counterpart to the connection to the Abstützpfosten. If an implant has, for example, a hexagon socket, the support post has an external hexagon instead of an external octagon. Furthermore, it is also possible that the conical section 2 and the second section 5 of the support post 1 are integrally formed.

The angle α can theoretically 0 ° (without support surface) to max. 89 °.

The bite template shown in Figure 4 is only one way to implement the invention. Thus, the base plate 15 of the bite template 17 instead of wax shafts 18 also have denture teeth. Such a base plate with raised prosthetic teeth is the final stage in the manufacture of dental prostheses and serves as a final check for a correct fit of the dentures.

Claims

Claims: 1. base plate (15) for producing a bite template (17) and / or for a list of prosthetic teeth, characterized in that it is fixable to at least one implant located in the mouth of a patient. 2. Base plate (15) according to claim 1, characterized in that it is screwed with at least one implant located in the mouth of a patient. 3. Base plate (15) according to any one of the preceding claims, characterized in that it has a number of the in-mouth implants corresponding number of recesses (16) for performing fastening means, in particular for performing Abstützpfosten (1) and / or screws ( 4). 4. Base plate (15) according to any one of claims 1 or 2, characterized in that it is associated with at least one Abstützpfosten (1) for supporting and / or fixing the base plate, comprising a channel (3) for passing a screw (4) and a substantially conical section (2). 5. base plate (15) according to claim 4, characterized in that a second portion (5) of the Abstützpfostens (1) has a connection region (7) for positive connection with an implant. 6. base plate (15) according to any one of claims 4 or 5, characterized in that the connecting region (7) of the second portion (5) of the Abstützpfostens (1) is at least partially formed as a male part for receiving in the implant (female part). 7. base plate (15) according to any one of the preceding claims, characterized in that it consists essentially of a curable plastic. 8. base plate (15) according to any one of the preceding claims, characterized in that it comprises at least one bite wall (18) and as a bite template (17) is usable. 9. base plate (15) according to one of claims 1 to 7, characterized in that it comprises a list of prosthetic teeth. 10. Abstützpfosten (1), in particular for supporting and / or fixing the base plate (15) according to one of claims 1 to 9, characterized by a conical portion (2) and a channel (3) for passing a screw (4). 11. Abstützpfosten (1) according to claim 10, characterized in that it comprises a second, a support surface (6) for a base plate (15) forming portion (5). 12. Abstützpfosten (1) according to any one of claims 10 or 11, characterized in that a second portion (5) of the Abstützpfostens (1) has a connection region (7) for the positive connection with an implant. 13. Abstützpfosten (1) according to any one of claims 10 to 12, characterized in that the connecting region (7) of the second portion (5) of the Abstützpfostens (1) is at least partially formed as a male part for inclusion in an implant (female part). 14. Abstützpfosten (1) according to any one of claims 10 to 13, characterized in that it is associated with a screw (4). 15. Abstützpfosten (1) according to any one of claims 10 to 14, characterized in that it has an internal thread. 16. Use of a support post (1) according to any one of claims 10-15 for supporting and / or fixing a base plate (15) according to any one of claims 1-9, in particular in the mouth of a patient. 17. A method for producing a dental prosthesis, characterized by the following steps: a) taking an initial impression of the jaw (upper or lower jaw) using a Kieferabdrucklöffel; b) production of a model (13) with integrated manipulatory implants according to the first impression; c) screwing Abstützpfosten (1), in particular according to one of claims 10 to 15, on the manipulation implants of the model; d) producing a bite template on the model (13) by first a base plate (15) made of soft, curable material on the mandibular arch of the model is formed so that it fits exactly on the jaw, in which case in the area of the support posts (1) Recesses (16) are drilled in the base plate; e) molding at least one bite wall (18) on the base plate; T) removing the finished bite template (17) from the model and fixing it in the patient's mouth; g) final bite in the patient's mouth; h) placement of prosthetic teeth on the basis of the bite marks in the at least one bite wall (18). 18. The method according to claim 16, characterized in that for fixing the base plate (15) in the mouth first Abstützpfosten (1), in particular Abstützpfos- ten according to any one of claims 10 to 15, are screwed into the implant located in the mouth of the patient and the base plate is placed on this. 19. The method according to any one of claims 16 or 17, characterized in that the prepared prosthetic teeth are placed on the wax (18) freed base plate (15) and the base plate is then fixed again in the patient's mouth for bite control by the Abstützpfosten.