CA2206703A1 - Process for the customised manufacture of dental prosthetic articles and dental treatment using same - Google Patents
Process for the customised manufacture of dental prosthetic articles and dental treatment using sameInfo
- Publication number
- CA2206703A1 CA2206703A1 CA002206703A CA2206703A CA2206703A1 CA 2206703 A1 CA2206703 A1 CA 2206703A1 CA 002206703 A CA002206703 A CA 002206703A CA 2206703 A CA2206703 A CA 2206703A CA 2206703 A1 CA2206703 A1 CA 2206703A1
- Authority
- CA
- Canada
- Prior art keywords
- grinding
- preparation
- model
- dental
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/70—Tooth crowns; Making thereof
- A61C5/77—Methods or devices for making crowns
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Dental Prosthetics (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Dental Preparations (AREA)
Abstract
The invention concerns a process for the customised production of dental prosthetic articles and dental treatment using those articles. This involves, first, taking an initial impression of the jaw to be treated including the checkbite and preparation of a highly accurate model, followed by grinding on the model of the teeth requiring treatment. The model in the resulting state is then stored by optical and/or mechanical scanning of the geometrical configuration. The dental article is then prepared in the known way. Grinding and preparation of the teeth in the jaw under treatment is then done using the stored data relating to the prepared state of the model, the grinding being done with a numerically controlled grinding and burring device placed inside or at the patient's mouth. The prosthetic element can then be fitted and cemented in place as soon as this grinding operation is completed.
Description
Specification The in~ention relates to a method of patient-specific manufacture of and treatment with dental prosthetic workpieces such as crowns, bridges or the like, ar.d is used in the der.tal and dental techr;ical field.
In the manufacture of dental prostheses, for example crowns or bridges, the so-called positive/necative process is known to be used. ~or this purpose firstly preparation of t~.e teeth is necessary on the patient in the dental practice. This preparation ir.cludes grinding the teeth in the jaw to be treated in order later to recei~Je a crown or bridge. After grind, a cast of the jaw and a sample bite of the patient are taken.
In order to protect the ground teeth until the prosthetic workpiece is finished, prepared temporary dentures are incorporated.
In parallel with this, a secor,d cast of the jaw is taken in the laboratory, in order that a model may be produced.
This model must be prepared with the maximum precision, as the tolerance between the mcdel and the workpiece manufactured therefrom ar.d the ground teeth substantially lies in the rar.ge of 25~m. Due to the properties of shrinkage and volume alteration of the material with the aid of which casts of mocels are made, there arises the problem that the lumen of the secor.d cast does not coincide with the volume of the ground-off tooth stump.
Thus the method of manufacturing the mocel, in oraer to be able to prepare the dental prosthetic workpiece, is extremely expensive and complicated. Specifically, the said cast for forming a copy of the stump and its environmer.t must be obtained, then the r.egative mould obtained must be cast. By means of a saw-cut process, the relevant stump portion is then released, and a foLndation for later production of the dental prosthetic workpiece is prepared by the lost-wax process. This workpiece is then optimised in a plurality of partial steps with several tests on the patient, alternating between the dental practice and the laboratory. The repeated removal and replacement of the temporary centures which becomes . -- .
necessary in this case is particularly painful and un~leasant.
Due to the difficulties and ir.accuracy in taking casts of the bite, the manufacturing outlay is further increased, and there is a risk that a der.tal prosthetic workpiece produced at great expense must be rejected.
It is therefore the object of the invention to propose a method of patient-specific mar.ufacture of and treatment with dental prosthetic workpieces, which reduces the overall treatment time, ensures a high cegree of precision in manufacture of the prosthetic workpieces, and by means of which a reduction of costs in the laboratory and the dental practice becomes possible.
~he object of the in~ention is achieved by a subject-matter accordir.g to the features of patent claim l, the sub-claims comprising at least appropriate designs and further developments.
~n essential basic idea of the invention resides in the fact that, contrary to the cor.~entional positive~negative techni~ue, only the positi~e technique is used. A
2S preparation, i.e. preliminary treatment of t~.e jaw to be . .
treated with a vieW to later attachment of dental prostheses, is effected exclusively in a l:l draft model.
After production of this draft model and establishment of S the treatment strategy, i.e. the necessary prostheses or other such workpieces, preparation of the mocel, i.e.
grinding of the teeth in th~ model, is undertaken either manually or by means of 2 numerically-controlled milling or grindir.g device.
~ 10 This grinding may be effected automatically, after previous visualisation, under computer control with access to a data bank in conjunction with the treatment strategy, particularly appropriate grinding shapes adapted to the respective shape of the jaw being selected from a multiplicity of geometric shapes present in the data bank.
After the draft model has been prepared, the prepared condition is stored by optical and/or mechanical scanning of the existina geometric configuration.
'~hen, in a knoh~n way, the dental prosthetic workpiece is prepared, this however being undertaken exclusively with the aid of the draft model, without having recourse to the patient. ~urther casts of the bite, tests, the preparation and insertion of temporary centures are no longer necessary either.
After the dental prosthetic workpiece has been prepared S and its seat on the draft model has been checked, according to the invention grinding and preparation of the teeth in the jaw to be treatec is undertaken according to the stored data of the prepared condition of the draft model. This grindir.g and preparation of the teeth is carried out with a numerically-controlled milling and grincing cevice fixed in or at the oral cavity of the patient.
This milling ar.d grinding device is located intra-orally at predetermined support points, or provided extra-orally with the exception of the actual grindirg or milling head.
Directly after preparation of the teeth on the patient, the prepared workpiece or the replacemer.t tooth is incorporated, so that the wearing of temporary dentures is avoided and painful irritation of the mucus mem~rane or of the pulpa, or undesira~le sensitivity to heat or cold, are reduced to a minimum.
~5 In accordance with a further basic idea of the invention, there is used for a second cast of the initial situation a material whose volume remains substantially ~naltered during the moulding and harder.ing procedure.
In or,e embodiment of the inver.tion, before grinding on the draft model, the initial condition of the same or the initial condition of the jaw to be treated are detected and stored by optical and/or mechanical scanning. ~Jith the aid of this set of data ur.der com;cuter control and with the aid of a three-dimensional vi5ualisation, a treatment strategy is worked out ar.d established, relating to which support ~olnts are to be selected in the jaw, and which geometric shape shall be established after grinding and~millir,g, drilling or the like. At the same time, essential properties of the dental prosthetic workpiece can be simulated with the aid of the computer, so that the manual outlay during manufactLre carried out in a known way of the dental prosthetic workpiece can itself be further reduced.
According to the invention, grindir,g of the teeth on the draft model can likewise be carried out under computer control, in that geometric grinding configurations prefera~ly to be observed are selected from a data bank.
'~he data sets of~geometric grinding for configurations preferably to be selected can be in relationship to the data set which comprises the initial cor,dition of the jaw or of the draft model. By me2ns of interaction between the dental technician and/or the dentist, planning data can be input or existing planning cata can be updated, so that the relevance of the geometric configurations offered by the data ~ar.k in relaticn to the initial condition is increased as regards the experiential values input.
It is also possible, by means of the input of data obtained by means of a computer tomogram, further to improve the precision and effectiveness of the prosthetic work; this prosthetic work can include the ir,sertion of im;clants, milling out displaced teeth ard the s,clitting of jaws in osteotomy operations.
In all, by following the method accordir.g to the inver,tion, the desired parallel position of the surfaces for the stumps to be formed can be realised in a way which is not achievable manually, by means of numerically-controlled automatic grinding, i.e. preparation of the teeth in the mouth of the patient with reference to a predetermined finished data set.
~he necessary accuracy of fit, i.e. the tolerances between the resultant preparation in the oral ca~Jity of the patient and the prepared dental prosthetic workpiece are guaranteed without expensive subse~uent work by means of the method accordin to the ir.vention. Any corrections which mav become necessary to the craft model can be carried oLt with ky the c'entist without repeated consLltation with the patient, a correspondirgly Lpdated data set being established after correction.
In all, by means'of the method according to the ir~vention, an extraordinarily high c'earee of accuracy of fit of the workpiece to be incorporated, and a considerable reduction in workina time, are achieved. At the same time the stress on the patient and dentist is recuced. ~urther, the otherwise necessary time for preparation of a secor.d cast after preparation on the patient, which is otherwise necessary for stypsis, drying and application of the retraction threads, and the copyina of the prepared teeth themselves, is eliminated.
Time-consLming tests corresrording to the technical dental intermediate steps in mar.ufacture of the workpiece for the 2C corresponding repeated registration of the bite are no longer necessary. The probability of corrections or re~roduction of the dental ~rosthetic workpiece itself is low.
Due to the avoidance of tests on the ,catient, the planning and work procedure in the dental technician's laboratory .. . .
~ 9 is improved~ leading to a uniforr, relief of 2emands on existing capacities with an ir.crease in ~uality ar.d more reliable prQvision of the dental prosthetic workpieces ~he invention will be expl2ined in more detail in the following with reference to an embodiment given by way of example.
Firstly a cast is taken of the situation of the jaw to be treated, inclusive of a cast of the bite, in the dental practice.
Then in the dental laboratory a cast of the mould at a 1:1 ratio is carried out with a suitable casting resin of corresponding vclume stability. ~he draft model thus obtained is ~,ounted in the articulator according to the arc of view and a correspondir.g registration is undertaken.
Now, likewise in the dental laboratory, preparation of the teeth to be treated is ur,dertaken, i.e. grinding either manually or by means of a numerically-controlled milling and grinding device.
In the case of manual grindina, the draft model thus prepared is optically and/or mechanically scanned, so that L
... , . .. ~ ~ . . .
the three-dlmer.sional configuratior, of the prepared condition is available as a data set for operating a numerically-cor.trolled millin and grinding device.
~fter the prepared conditicn of the draft mocel has been stored, now in a conventional way preparation of the dental ~rosthetic ~lork~iece can ke carried out in the lakoratory.
lC This preparation makes use purely of the existing draft model, so that the patient himself need not be involved in the manufacturing process. The incorporation and re-preparation of temporary dentures and/or a renewed cast of the bite on the patient are no longer necessary either~
Finally, the completed dental prosthetic workpiece can be adapted or incorporated in a testing moce on the draft model, so that any r.ecessary corrections during incorporation of the same in the jaw of the patier.t to be treated can ~e reduced or entirely eliminated.
T~he stored data set is then transferred to a nu~erically-controlled milling and grinding device, which is located in the dental practice. ~his grinding ce~Tice is fixed at or in the oral cavity of the patient and grinding of the teeth is undertaken with reference to the available data.
.. . .
.
~he dental prosthetic workpiece which has in the meantime been prepared can be tried anc cemented in the oral cavity of the patient immedi2tely zfter termination of the grinding procedure, i.e. preparation.
By means of using a numerically-cor.trolled milling and grincing cevice which makes use of a data set which has been produced as~a required data set by means of a draft model, a complete prosthetic treatment can be undertaken without ir.terim, expensive trials. As the er.tire dental technical ~rork takes place on or with the draft model, and the prepared ~rorkpiece is incorporated in the oral cavity only when it is completec, it is possible for the dental technician to establish a prosthetic insert without lS risking the quality of preparation of t~.e workpiece due to excessively short setting of cates between otherwise necessary treatments.
Due to fixing the numerically-controlled milling and grinding cevice at reference points which can be predetermined with the aid of the draft model, inaccuracies such as occur in previous preparation, e.g.
due to poor visionl difficulty of access to the working area or movements of the patient can be eliminated , The problem of inaccurate casting occurring in prior art after the completion of pre;caration in the oral ca ity of the patient is completely eliminated. Finally, no inaccuracies occur due to erroneous registration of the bite due to loosened support zones, as the cast of the bite is effected in the oriair.al condition before loosening the support.
In summary, the following options may be realised with the lC method accordir.g to the invention.
On the one hand, the draft mocel may !ce manually cround by the centist or dental technician ar.d is then optically and/or ~echanically scanr.ed, subse~uent preparation being undertaker. in accorcance with the stored data in the oral cavity of the patier.t. ~he prosthetic work is carried out manually in a known way by the dental technician.
In another ~ariant, the prosthetic work is not carried out manually by the dental technician, but automatically, after appropriate plannir.g, by the dental technician and/or dentist, making use of a computer model, by a numerically-cor.trolled de~ice.
Alternativelyl the draft model can be produced automatically by using the mentioned data bar.k . CA 02206703 1997-06-03 .
information, by mear.s of a r,umerically-controlled milling and grinding machine, preparation of the dental prosthetic work being effected manually by the dental technician according to prior art.
In this case also it is possible, instead of manual preparation of the cental prosthetic work, to undertake this under computer control by mear.s of a corresponding numerical machine tool.
Finally it is possible to eliminate the preparation of a real draft model completely, and to work purely with a computer model, in order in common to make a draft model based on experiential values of the dental technician and/or of the centist, ar.d to establish the treatment strategy as well as to obtain data for producing the dental prosthetic work. In the latter case in ,carticular it is advantageous if, using the computer planning data, productior. of the dental prcsthetic work is taken over by a numerically-controlled machine tool, and the preparation or grinding of the teeth in the mouth of the patient is likewise undertaken with the numerically-controlled milling and grinding machine, in accordance with data sets likewise present.
.
In the manufacture of dental prostheses, for example crowns or bridges, the so-called positive/necative process is known to be used. ~or this purpose firstly preparation of t~.e teeth is necessary on the patient in the dental practice. This preparation ir.cludes grinding the teeth in the jaw to be treated in order later to recei~Je a crown or bridge. After grind, a cast of the jaw and a sample bite of the patient are taken.
In order to protect the ground teeth until the prosthetic workpiece is finished, prepared temporary dentures are incorporated.
In parallel with this, a secor,d cast of the jaw is taken in the laboratory, in order that a model may be produced.
This model must be prepared with the maximum precision, as the tolerance between the mcdel and the workpiece manufactured therefrom ar.d the ground teeth substantially lies in the rar.ge of 25~m. Due to the properties of shrinkage and volume alteration of the material with the aid of which casts of mocels are made, there arises the problem that the lumen of the secor.d cast does not coincide with the volume of the ground-off tooth stump.
Thus the method of manufacturing the mocel, in oraer to be able to prepare the dental prosthetic workpiece, is extremely expensive and complicated. Specifically, the said cast for forming a copy of the stump and its environmer.t must be obtained, then the r.egative mould obtained must be cast. By means of a saw-cut process, the relevant stump portion is then released, and a foLndation for later production of the dental prosthetic workpiece is prepared by the lost-wax process. This workpiece is then optimised in a plurality of partial steps with several tests on the patient, alternating between the dental practice and the laboratory. The repeated removal and replacement of the temporary centures which becomes . -- .
necessary in this case is particularly painful and un~leasant.
Due to the difficulties and ir.accuracy in taking casts of the bite, the manufacturing outlay is further increased, and there is a risk that a der.tal prosthetic workpiece produced at great expense must be rejected.
It is therefore the object of the invention to propose a method of patient-specific mar.ufacture of and treatment with dental prosthetic workpieces, which reduces the overall treatment time, ensures a high cegree of precision in manufacture of the prosthetic workpieces, and by means of which a reduction of costs in the laboratory and the dental practice becomes possible.
~he object of the in~ention is achieved by a subject-matter accordir.g to the features of patent claim l, the sub-claims comprising at least appropriate designs and further developments.
~n essential basic idea of the invention resides in the fact that, contrary to the cor.~entional positive~negative techni~ue, only the positi~e technique is used. A
2S preparation, i.e. preliminary treatment of t~.e jaw to be . .
treated with a vieW to later attachment of dental prostheses, is effected exclusively in a l:l draft model.
After production of this draft model and establishment of S the treatment strategy, i.e. the necessary prostheses or other such workpieces, preparation of the mocel, i.e.
grinding of the teeth in th~ model, is undertaken either manually or by means of 2 numerically-controlled milling or grindir.g device.
~ 10 This grinding may be effected automatically, after previous visualisation, under computer control with access to a data bank in conjunction with the treatment strategy, particularly appropriate grinding shapes adapted to the respective shape of the jaw being selected from a multiplicity of geometric shapes present in the data bank.
After the draft model has been prepared, the prepared condition is stored by optical and/or mechanical scanning of the existina geometric configuration.
'~hen, in a knoh~n way, the dental prosthetic workpiece is prepared, this however being undertaken exclusively with the aid of the draft model, without having recourse to the patient. ~urther casts of the bite, tests, the preparation and insertion of temporary centures are no longer necessary either.
After the dental prosthetic workpiece has been prepared S and its seat on the draft model has been checked, according to the invention grinding and preparation of the teeth in the jaw to be treatec is undertaken according to the stored data of the prepared condition of the draft model. This grindir.g and preparation of the teeth is carried out with a numerically-controlled milling and grincing cevice fixed in or at the oral cavity of the patient.
This milling ar.d grinding device is located intra-orally at predetermined support points, or provided extra-orally with the exception of the actual grindirg or milling head.
Directly after preparation of the teeth on the patient, the prepared workpiece or the replacemer.t tooth is incorporated, so that the wearing of temporary dentures is avoided and painful irritation of the mucus mem~rane or of the pulpa, or undesira~le sensitivity to heat or cold, are reduced to a minimum.
~5 In accordance with a further basic idea of the invention, there is used for a second cast of the initial situation a material whose volume remains substantially ~naltered during the moulding and harder.ing procedure.
In or,e embodiment of the inver.tion, before grinding on the draft model, the initial condition of the same or the initial condition of the jaw to be treated are detected and stored by optical and/or mechanical scanning. ~Jith the aid of this set of data ur.der com;cuter control and with the aid of a three-dimensional vi5ualisation, a treatment strategy is worked out ar.d established, relating to which support ~olnts are to be selected in the jaw, and which geometric shape shall be established after grinding and~millir,g, drilling or the like. At the same time, essential properties of the dental prosthetic workpiece can be simulated with the aid of the computer, so that the manual outlay during manufactLre carried out in a known way of the dental prosthetic workpiece can itself be further reduced.
According to the invention, grindir,g of the teeth on the draft model can likewise be carried out under computer control, in that geometric grinding configurations prefera~ly to be observed are selected from a data bank.
'~he data sets of~geometric grinding for configurations preferably to be selected can be in relationship to the data set which comprises the initial cor,dition of the jaw or of the draft model. By me2ns of interaction between the dental technician and/or the dentist, planning data can be input or existing planning cata can be updated, so that the relevance of the geometric configurations offered by the data ~ar.k in relaticn to the initial condition is increased as regards the experiential values input.
It is also possible, by means of the input of data obtained by means of a computer tomogram, further to improve the precision and effectiveness of the prosthetic work; this prosthetic work can include the ir,sertion of im;clants, milling out displaced teeth ard the s,clitting of jaws in osteotomy operations.
In all, by following the method accordir.g to the inver,tion, the desired parallel position of the surfaces for the stumps to be formed can be realised in a way which is not achievable manually, by means of numerically-controlled automatic grinding, i.e. preparation of the teeth in the mouth of the patient with reference to a predetermined finished data set.
~he necessary accuracy of fit, i.e. the tolerances between the resultant preparation in the oral ca~Jity of the patient and the prepared dental prosthetic workpiece are guaranteed without expensive subse~uent work by means of the method accordin to the ir.vention. Any corrections which mav become necessary to the craft model can be carried oLt with ky the c'entist without repeated consLltation with the patient, a correspondirgly Lpdated data set being established after correction.
In all, by means'of the method according to the ir~vention, an extraordinarily high c'earee of accuracy of fit of the workpiece to be incorporated, and a considerable reduction in workina time, are achieved. At the same time the stress on the patient and dentist is recuced. ~urther, the otherwise necessary time for preparation of a secor.d cast after preparation on the patient, which is otherwise necessary for stypsis, drying and application of the retraction threads, and the copyina of the prepared teeth themselves, is eliminated.
Time-consLming tests corresrording to the technical dental intermediate steps in mar.ufacture of the workpiece for the 2C corresponding repeated registration of the bite are no longer necessary. The probability of corrections or re~roduction of the dental ~rosthetic workpiece itself is low.
Due to the avoidance of tests on the ,catient, the planning and work procedure in the dental technician's laboratory .. . .
~ 9 is improved~ leading to a uniforr, relief of 2emands on existing capacities with an ir.crease in ~uality ar.d more reliable prQvision of the dental prosthetic workpieces ~he invention will be expl2ined in more detail in the following with reference to an embodiment given by way of example.
Firstly a cast is taken of the situation of the jaw to be treated, inclusive of a cast of the bite, in the dental practice.
Then in the dental laboratory a cast of the mould at a 1:1 ratio is carried out with a suitable casting resin of corresponding vclume stability. ~he draft model thus obtained is ~,ounted in the articulator according to the arc of view and a correspondir.g registration is undertaken.
Now, likewise in the dental laboratory, preparation of the teeth to be treated is ur,dertaken, i.e. grinding either manually or by means of a numerically-controlled milling and grinding device.
In the case of manual grindina, the draft model thus prepared is optically and/or mechanically scanned, so that L
... , . .. ~ ~ . . .
the three-dlmer.sional configuratior, of the prepared condition is available as a data set for operating a numerically-cor.trolled millin and grinding device.
~fter the prepared conditicn of the draft mocel has been stored, now in a conventional way preparation of the dental ~rosthetic ~lork~iece can ke carried out in the lakoratory.
lC This preparation makes use purely of the existing draft model, so that the patient himself need not be involved in the manufacturing process. The incorporation and re-preparation of temporary dentures and/or a renewed cast of the bite on the patient are no longer necessary either~
Finally, the completed dental prosthetic workpiece can be adapted or incorporated in a testing moce on the draft model, so that any r.ecessary corrections during incorporation of the same in the jaw of the patier.t to be treated can ~e reduced or entirely eliminated.
T~he stored data set is then transferred to a nu~erically-controlled milling and grinding device, which is located in the dental practice. ~his grinding ce~Tice is fixed at or in the oral cavity of the patient and grinding of the teeth is undertaken with reference to the available data.
.. . .
.
~he dental prosthetic workpiece which has in the meantime been prepared can be tried anc cemented in the oral cavity of the patient immedi2tely zfter termination of the grinding procedure, i.e. preparation.
By means of using a numerically-cor.trolled milling and grincing cevice which makes use of a data set which has been produced as~a required data set by means of a draft model, a complete prosthetic treatment can be undertaken without ir.terim, expensive trials. As the er.tire dental technical ~rork takes place on or with the draft model, and the prepared ~rorkpiece is incorporated in the oral cavity only when it is completec, it is possible for the dental technician to establish a prosthetic insert without lS risking the quality of preparation of t~.e workpiece due to excessively short setting of cates between otherwise necessary treatments.
Due to fixing the numerically-controlled milling and grinding cevice at reference points which can be predetermined with the aid of the draft model, inaccuracies such as occur in previous preparation, e.g.
due to poor visionl difficulty of access to the working area or movements of the patient can be eliminated , The problem of inaccurate casting occurring in prior art after the completion of pre;caration in the oral ca ity of the patient is completely eliminated. Finally, no inaccuracies occur due to erroneous registration of the bite due to loosened support zones, as the cast of the bite is effected in the oriair.al condition before loosening the support.
In summary, the following options may be realised with the lC method accordir.g to the invention.
On the one hand, the draft mocel may !ce manually cround by the centist or dental technician ar.d is then optically and/or ~echanically scanr.ed, subse~uent preparation being undertaker. in accorcance with the stored data in the oral cavity of the patier.t. ~he prosthetic work is carried out manually in a known way by the dental technician.
In another ~ariant, the prosthetic work is not carried out manually by the dental technician, but automatically, after appropriate plannir.g, by the dental technician and/or dentist, making use of a computer model, by a numerically-cor.trolled de~ice.
Alternativelyl the draft model can be produced automatically by using the mentioned data bar.k . CA 02206703 1997-06-03 .
information, by mear.s of a r,umerically-controlled milling and grinding machine, preparation of the dental prosthetic work being effected manually by the dental technician according to prior art.
In this case also it is possible, instead of manual preparation of the cental prosthetic work, to undertake this under computer control by mear.s of a corresponding numerical machine tool.
Finally it is possible to eliminate the preparation of a real draft model completely, and to work purely with a computer model, in order in common to make a draft model based on experiential values of the dental technician and/or of the centist, ar.d to establish the treatment strategy as well as to obtain data for producing the dental prosthetic work. In the latter case in ,carticular it is advantageous if, using the computer planning data, productior. of the dental prcsthetic work is taken over by a numerically-controlled machine tool, and the preparation or grinding of the teeth in the mouth of the patient is likewise undertaken with the numerically-controlled milling and grinding machine, in accordance with data sets likewise present.
.
Claims (6)
1. Method of patient-specific manufacture of and treatment with dental prosthetic workpieces, comprising the following steps:
- casting of the initial situation of the jaw to be treated, including a cast of the bite and preparation of a draft model of high accuracy;
- preparation, particularly grinding of teeth to be treated on the draft model;
- storage of the prepared condition by optical and/or mechanical scanning of the obtained geometric configuration of the draft model;
- preparation of the dental prosthetic workpiece, for example a crown or bridge in a known way, yet purely with the aid of the draft model;
- grinding and preparing teeth to be treated in the jaw according to the stored data of the programmed condition of the draft model, preferably with a numerically-controlled milling and grinding device fixed in or at the oral cavity of the patient, and - insertion of the dental prosthetic workpiece.
- casting of the initial situation of the jaw to be treated, including a cast of the bite and preparation of a draft model of high accuracy;
- preparation, particularly grinding of teeth to be treated on the draft model;
- storage of the prepared condition by optical and/or mechanical scanning of the obtained geometric configuration of the draft model;
- preparation of the dental prosthetic workpiece, for example a crown or bridge in a known way, yet purely with the aid of the draft model;
- grinding and preparing teeth to be treated in the jaw according to the stored data of the programmed condition of the draft model, preferably with a numerically-controlled milling and grinding device fixed in or at the oral cavity of the patient, and - insertion of the dental prosthetic workpiece.
2. Method according to claim 1, characterised by casting of the initial situation in a material, preferably casting resin, whose volume remains substantially unaltered during the moulding and hardening process.
3. Method according to claim 1 or 2, characterised in that the draft model is fixed in an articulator according to the arc of view and/or central relation.
4. Method according to one of claims 1 to 3, characterised by grinding of teeth to be treated on the craft model by means of the numerically-controlled milling and grinding device according to a pattern preparation data set of simple geometry, the final condition of the preparation on the draft model being stored as a required condition for the preparation of the teeth to be treated in the jaw.
5. Method according to one of claims 1 to 4, characterised in that after storage of the required condition with the data set available, a computer controlled, three-dimensionally-visualised planning of the dental prosthetic workpiece to be prepared is undertaken.
6. Method according to one of claims 1 to 3, characterised in that before grinding on the draft model, the initial condition is detected by optical and/or mechanical scanning and stored, then, by means of the data set obtained, a computer-controlled, three-dimensional visualisation is undertaken, and optimum grinding or milling geometries are input or taken up from a data bank for the subsequent preparation step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4443929A DE4443929C1 (en) | 1994-12-09 | 1994-12-09 | Method for patient=specific prodn. of and treatment with dental-prostheses |
| DEP4443929.6 | 1994-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2206703A1 true CA2206703A1 (en) | 1996-06-13 |
Family
ID=6535416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002206703A Abandoned CA2206703A1 (en) | 1994-12-09 | 1995-12-04 | Process for the customised manufacture of dental prosthetic articles and dental treatment using same |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0796063B1 (en) |
| JP (1) | JPH11501824A (en) |
| AT (1) | ATE179582T1 (en) |
| AU (1) | AU4177696A (en) |
| CA (1) | CA2206703A1 (en) |
| DE (2) | DE4443929C1 (en) |
| DK (1) | DK0796063T3 (en) |
| WO (1) | WO1996017561A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19816546C1 (en) * | 1998-04-15 | 1999-08-19 | Wolz | Method of producing entirely ceramic inlays, crowns, bridges, partial bridges and frames for dental implants or superstructures |
| DE19843385C1 (en) * | 1998-09-22 | 2000-05-18 | Gerd Neuschaefer | Device for preparing a tooth for receiving a crown, bridge or the like. |
| AU3819800A (en) | 1999-04-12 | 2000-11-14 | Funk, Wolfgang | Method for computer-assisted patient-specific representation and planning of dental and/or dental prosthetic work |
| DE19959383C1 (en) | 1999-12-09 | 2001-04-12 | Gerd Neuschaefer | Tooth preparation device for reception of dental crown or bridge uses preparation model with model tooth and copier grinder transferring work on model tooth to actual tooth |
| DE10301958B4 (en) * | 2002-10-07 | 2007-08-16 | Platt, Hubertus, Dr. | Method for producing a dental implant for an intraoral implantation field |
| AU2003271578A1 (en) | 2002-10-07 | 2004-05-04 | Hubertus Platt | Method for producing and placing a dental implant |
| DE102007029115B4 (en) | 2007-06-25 | 2010-03-25 | Engelhardt, Thomas, Dr. med. Dr. med. dent. | Fixation plate and method of use |
| DE102012003811A1 (en) | 2012-02-27 | 2013-08-29 | Peter NEUMEIER | Dental method for generating guide path of preparation guide rail, involves determining data set representing ideal taxidermy, guiding cutting tool depending on data set, and determining another data set representing actual denture surface |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3203937C2 (en) * | 1982-02-05 | 1985-10-03 | Luc Dr. 4150 Krefeld Barrut | Method and device for machine restoration or correction of at least one tooth or for machine preparation of at least one tooth for a fixed prosthetic restoration and for machine production of the fixed prosthetic restoration |
| DE3604531A1 (en) * | 1986-02-13 | 1987-08-20 | Kurt Kern Gmbh & Co Kg | Method of producing denture parts and device for performing the method |
| US4941826A (en) * | 1988-06-09 | 1990-07-17 | William Loran | Apparatus for indirect dental machining |
-
1994
- 1994-12-09 DE DE4443929A patent/DE4443929C1/en not_active Expired - Lifetime
-
1995
- 1995-12-04 DK DK95940270T patent/DK0796063T3/en active
- 1995-12-04 CA CA002206703A patent/CA2206703A1/en not_active Abandoned
- 1995-12-04 EP EP95940270A patent/EP0796063B1/en not_active Expired - Lifetime
- 1995-12-04 AT AT95940270T patent/ATE179582T1/en not_active IP Right Cessation
- 1995-12-04 DE DE59505863T patent/DE59505863D1/en not_active Expired - Fee Related
- 1995-12-04 WO PCT/EP1995/004764 patent/WO1996017561A1/en active IP Right Grant
- 1995-12-04 AU AU41776/96A patent/AU4177696A/en not_active Abandoned
- 1995-12-04 JP JP8517314A patent/JPH11501824A/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11501824A (en) | 1999-02-16 |
| WO1996017561A1 (en) | 1996-06-13 |
| ATE179582T1 (en) | 1999-05-15 |
| DE59505863D1 (en) | 1999-06-10 |
| DE4443929C1 (en) | 1996-02-01 |
| EP0796063A1 (en) | 1997-09-24 |
| AU4177696A (en) | 1996-06-26 |
| DK0796063T3 (en) | 1999-11-15 |
| EP0796063B1 (en) | 1999-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |