EP2192873A1 - Method for making a dental prosthesis and related surgical guide - Google Patents

Method for making a dental prosthesis and related surgical guide

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Publication number
EP2192873A1
EP2192873A1 EP20080803134 EP08803134A EP2192873A1 EP 2192873 A1 EP2192873 A1 EP 2192873A1 EP 20080803134 EP20080803134 EP 20080803134 EP 08803134 A EP08803134 A EP 08803134A EP 2192873 A1 EP2192873 A1 EP 2192873A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
jaw
implants
prosthesis
model
parts
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.)
Withdrawn
Application number
EP20080803134
Other languages
German (de)
French (fr)
Inventor
Moyer Philippe Albert Paul Ghislain De
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
2INGIS SA
Original Assignee
2INGIS SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/0003Making bridge-work, inlays, implants or the like
    • A61C13/0004Computer-assisted sizing or machining of dental prostheses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/0075Implant heads specially designed for receiving an upper structure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00Impression cups, i.e. impression trays; Impression methods
    • A61C9/004Means or methods for taking digitized impressions
    • A61C9/0046Data acquisition means or methods
    • A61C9/0053Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/0003Making bridge-work, inlays, implants or the like
    • A61C13/0006Production methods
    • A61C13/0013Production methods using stereolithographic techniques

Abstract

The invention relates to a method for making dental prostheses and related surgical guides, that comprises making the prosthesis and/or the surgical guide based on a model that reproduces the bone portions of the jaw using a first material and the mucosa portions of the jaw using a second material softer than the first material, and made on the basis of a computer modelling of the mucosa portions and the bone portions of the jaw by radiographic data differentiation. The invention also relates to the individualised production in a single piece of one or more implants for such a dental prosthesis that comprises machining rods or studs of a biocompatible material. The invention further relates to a ready-to-use individualised kit for placing a dental prosthesis, that comprises this type of prosthesis, this type of surgical guide and/or one or more implants of this type, as well as screwing keys for placing the implants and optionally suitable drills.

Description

A method of manufacturing a dental prosthesis and a surgical guide relating thereto

The invention relates to the production of surgical guides (/ radiological guides) and individualized dental implants implanted in the jaw of a patient, an apparatus for the design and manufacture of such implants as well as apparatus implemented for such implantation.

Current implants placed, are standard parts that differ from one brand to another in their shapes (cylindrical, cylindro-conical or conical), diameters, lengths and material (titanium, zirconium oxide, ....) .

The choice of implants is usually a function of or surgical kits corresponding to the implant brands that implantologist chose to place in the mouth of his patients.

The choice is also guided by the implants that the implantologist has in stock.

The stock often depends on the discount the firm concedes implants depending on the quantity of implants that the implantologist buys.

It automatically follows that the implantologist place implants in the mouth of his patients who do not fit the bone structure of their patients but to the structure of its stock.

Implantology is the specialization in the dental sector with the greatest growth and the largest innovative developments in the sector. This is also a reason for implantologists with the stock to get rid of quickly.

The implants are placed for the time in four ways:

1. Freehand with a wide cut in the gum and detachment of the gingiva and the periosteum. The installation is an archaic manner without any reference mark and no relation to the future prosthesis. The general practitioner is a radio site to implement and panoramic radio and sometimes he sends his patient to the hospital to have scan sagittal section of bone and bone quality know thanks to computer programs. Although Whether this technique is the worst and gives results often aesthetically and hygienically disastrous operation, it is the most used. It's also one that causes the most accidents (rupture of nerves, blood ruptured artery, piercing the sinus fracture and fracture of cortical, ....).

2. Freehand with a wide cut in the gum and detachment of the gingiva and the periosteum. The installation is done in a more or less precise manner since the dental laboratory has made a surgical guide that prefigures much the future prosthesis. The general practitioner is a radio site to implement and panoramic radio and sometimes he sent his patient to hospital scanner to have sagittal section of bone and bone quality know thanks to computer programs. This technique is the second most used, but the downside is that the surgical guide is often unusable seen cutting the gum that prevents the implementation of the latter. With this technique the results are often bad aesthetically, functional, hygienic and accidents as mentioned above are numerous. 3. With the hand guided by drilling guides produced from a computerized plan based on the information obtained by radiography (scanner, tomography, ...) - This technique allows From place drilling cylinders in guides to specific locations depending on the bone or function of the bone and the future prosthesis. Three distinct technologies apply this way of posing the implants: A - through stéréolitographiques guides for surgery, made from X-ray images (while the images or not containing a prosthetic guide). These stéréolitographiques guides are made from the voxel contained in radiological information. Since cubic voxel is a reading-is needed to create a guide stéréolitographique in a loss of adaptation to the harsh elements (teeth) and soft (gums). Artifacts often disturb the production of these guides which increases their inaccuracy.

B - by means of surgical guides, made from an impression and a radiological guide produced based on this non-compressive silicone impression (and not based on an image from dental X-ray data). This radiological guide is then converted into a surgical guide by inserting the guide rollers for the drilling and placement of implants in the jaw. This technology is more specifically described in WO 2006/082198 A. C - by means of surgical guides made from an impression and a radiological guide which is made based on this non-compressive silicone impression (and not based on an image from dental radiological data). This radiological guide is then converted into a surgical guide by inserting the guiding devices for drilling and placement of implants in the jaw. This technology is the subject of Patent Application EP 06116963.7 These techniques can reduce damage to the patient and in particular the last technique optimizes the prosthetic result.

The fourth way to implants, is a method:

4. In free hand guided by a navigation system (GPS). This technique allows placing with more precision at least one implant. But it does not prevent damage to the patient since the drilling is still manual and skidding remains possible. Furthermore it does not take account of the future prosthesis. This technique is expensive and is the least used.

All these techniques except 3A, 3B, 3C together have the disadvantage of having to make the final prosthesis after a jaw fingerprinting where the implants were placed previously, which is carried out several weeks or months after implant placement, which is complex and many postoperative interventions burdensome for the patient. In addition the majority of implants have no external screws to hold the bone, and an internal thread overcome by an external or internal polygon. His last used to set a "abutment" (= the abutment of an implant for receiving a prosthesis) straight or angled into the implant. At the joint between the implant and the abutment bacteria can settle which can cause bone resorption peripherally to the joint between the implant and the abutment. This can be avoided by moving the edge of the seal to the center of the implant. That is to say that the diameter of the implant collar is greater than that of the diameter of the insert of the abutment into the implant what is called in the jargon dental "platform switching". Other implants are made of a single piece that is to say, the screw part and abutment are made of one piece. This has the big advantage of not having to joint between the part of the implant and the abutment. The manufacturing costs are reduced in comparison with an implant and abutment separated.

The disadvantages of these implants is that the abutment part is always relative to the axial axis of the implant and that the boundary between the implant and the abutment always has a cylindrical or conical shape surmounted by a horizontal collar, this which does not match the gingival profile.

It is also known to produce dental prostheses and surgical guides relating thereto, realizing the prosthesis / surgical guide based on a physical model made from an impression of the jaw of a patient and a "radiological guide", obtained by computer modeling from radiographic data and fitting onto said first model, comprising portions of radiopaque material corresponding to the shape of teeth provided for the prosthesis to be produced and to spaces between said first model and said teeth, and used to produce a radiographic image of the patient's jaw.

It refers in particular in this context, the following documents: WO 2007/079775 A - describing a guided surgery system (after DICOM data analysis) with primary tube and secondary tube bayonet fixing is the primary tube that guides forest. The bayonet tube comprises a cutting edge for cutting the gum. The implants are inserted through the primary guide;

WO 99/32045 A and WO 03/073954 A - describing a guided surgery system (after DICOM data analysis) with primary and secondary tube fixing tube in the primary tube, guiding the drill bit. The positioning of the tubes provides for drilling holes in a plaster model and the placement of inserts for making the guide with primary guide tubes. After implant placement guide and tubes are used to record the position of the implants by using the guide to make an impression;

WO 2006/031096 A - describing a guided surgery system (after DICOM data analysis) with primary and secondary tube fixing tube in the primary tube, guiding the drill bit. The implants are inserted through the primary guide. The implant includes a separate abutment. The abutment is produced and placed a rough second scan when the implants are osseointegrated;

WO 2007/134701 A - describing a method of bone overrates analysis by sampling and digitizing depth. No DICOM image, but only a radio RX 2D image.

The present invention aims to develop a method of manufacturing a dental implant implanted in a jaw of a patient, overcoming the drawbacks of the prior art and permits attachment of the prosthesis to implant the day or the implant is implanted in the bone of the patient's mouth.

For this the invention provides a new method for manufacturing a dental prosthesis and a surgical guide relating thereto, wherein the prosthesis and / or the surgical guide are made on basis of a first physical model obtained from an impression of the jaw of a patient and a "radiological guide", obtained by computer modeling from radiographic data and fitting onto said first model, comprising portions of radiopaque material corresponding to the shape of teeth provided for the prosthesis to be produced and to spaces between said first model and said teeth, and used to produce a radiographic image of the patient's jaw, this new method involving in particular the realization of a second physical model reproducing, a first material, the bone parts of the jaw and a second material softer than the first material, mucosa parts of the MAC hoire, using computer modeling of the location of mucosa parts and bone parts of the jaw, by differentiation radiographic data.

In this context the term "natural" model must be understood in the sense of "model material" or "concrete model" as opposed to the computer model (mainly "non-concrete").

According to a particular embodiment of the invention, the method implies that the second model is obtained by modifying (i.e. turning it by machining, size reduction, etc.) said first model, based on said modeling computer portions mucous membranes and bone parts of the jaw by differentiation radiographic data, so as to reproduce the bone parts of the jaw, and is covered by molding with respect to said "radiological guide", using a material relatively soft, mucosal portions of the jaw.

According to one feature of the invention, the method preferably comprises an individual modeling step, virtual, constituent elements (insert, "abutment", etc.) of one or more implants for said denture, based on said modeling data from X-ray data, and optionally according to said physical model reproducing mucosa parts and the bone parts of the jaw of a patient, and individualized embodiment, one piece of each implant by melting data from the virtual modeling of their constituent elements.

This individualized, virtual modeling, components (insert and "abutment") implants may in particular be made by a patterning step of the shape of the implant on the physical model reproducing mucosa parts and the bone parts of the jaw, and can, particularly adequately involve the use of a "key" represents the position of the future teeth.

According to another preferred feature of the invention, the novel process of manufacturing a dental prosthesis and a surgical guide relating thereto, wherein the prosthesis and / or the surgical template are carried out based on at least an oral cavity and computer modeling from radiographic data, specifically includes individualized embodiment, in one piece (material), one or more implants for said dental prosthesis by machining bar or pads of biocompatible material (such as titanium, zirconia, or the like), depending on virtual coins obtained by computer modeling data fusion of their constituent elements.

The new method according to the invention can particularly adequately serve the realization of a "kit" individualized, ready for placement of a dental prosthesis including the prosthesis, a surgical guide relating thereto, one or more implants for the prosthesis and one or more power tongs for placement or implant, and optionally one or more drills.

The invention therefore also a specific object placement kit for a dental prosthesis, comprising at least one prosthesis, the surgical guide relating thereto, one or more implants for or replacement (s) and one or more tongs for placement or implant, and optionally one or more bits, wherein the implants are made of one piece, on the basis of virtual coins obtained by computer modeling data fusion of their constituent elements, implants, drills and / or tongs being designed individualized manner to said prosthesis according to the morphology of the jaw to which the prosthesis is intended.

More particularly, the invention thus relates to an investment kit manufactured by a procedure as described above and / or in the specific example below.

Other features and other features of Te invention will appear on reading the following detailed description of a particular embodiment of the invention, given by way of example with reference to the figures attached.

The manufacturing method according to the invention, a dental prosthesis to be implanted in the jaw of a patient, specifically involves: providing from a footprint of the patient's jaw and a model of a mounting teeth adjusted buccally; a test to mount teeth is made in the patient's mouth in order to validate the aesthetics and occlusion (Fig. 1) - after the test is fixed on the model of mounting a reference (e.g., a block LEGO® ) (fig. 2). this model is then scanned (Fig. 3). after scanning the model assembly is fixed teeth are adjusted by preparing the mounting via a key, such that the assembly is adjusted as well as buccal palatal or lingual (Fig. 4). then it scans the pattern again with the reference, but overcome by the assembly, - the scanner data is then processed by computer (Fig. 5); one carries out a correlation between the model data and model data with the assembly; is defined on the virtual model with the mounting part on which a radiological guide will extend; from its limits a curvature of walls is defined (fig. 6). - is defined on the virtual mounting partitions (fig. 7). treating the images of the model in order to define the direction of insertion and removal of the guide strips against the model; after this operation is virtually realizes the hull of the guide (Fig. 8). then defines a space about the model and around the teeth of the assembly (Fig. 9). this assembly is then separated to obtain virtually separate teeth (Fig. 10). this set of teeth separated is then fused with the shell

(Fig. 11). - computing these data are sent to a multi-axis machine tool (multiaxis machine) or a rapid prototyping machine (3D printer, stereophotography ...) to provide a resin guide (/ polymer) whose teeth and spaces around teeth are represented by voids (fig. 12). - the guide (radiological guide) will be provided with its own reference (e.g. another Lego block) (Fig. 13). then the tooth cavities and the cavities around the teeth are filled with resin radiopaque (e.g. resin with barium sulfate); the guide is positioned before curing thereof on the model, and is removed ( "demolded") guide the model after hardening of the resin (Fig. 14). this guide is then placed on the patient's jaw (hospital) and scanned in position. - a first computer processing X-ray image (picture "DICOM") in two dimensions representing the aforementioned radiological guide in position on the jaw, allows to provide a three-dimensional image; in the images in two and three dimensions, the bone part area and the part of the patient's soft tissue is clearly defined by the resin radiopaque (fig.15).

Realization of a 3D model of the bone and soft tissue three-dimensional model representing the bone tissue and soft tissue (see Figures 21 and 27) is then performed through the set of data (images in two and three dimensions ) defining the bone portion and the portion of the patient's soft tissue, either by manufacturing the model with a prototyping machine or any other machine capable of reproducing 3D hard parts and less hard portions / more flexible / softer (on a first operating verbose below, referring to FIGS. 16-21), or by transforming the first model made from an impression of the jaw of the patient as described above, in a model having hard parts and soft parts (according to a second procedure detailed fashion below, with reference to fig. 24-27) * first operating mode is defined / visualized in the 2D and 3D images, d them clearly distinct areas: the bony portion and the soft tissue portion; these portions may be defined, for example by different gray values ​​(low value for soft tissue and high value for hard tissue and bone); there are specific scales to measure the gray values; by viewing the image with a high gray value (filter), it shows the bone portion and the radiopaque portion of the guide (fig.16); by viewing the image with a low gray value (filter), it shows all the parts: bone portion, soft tissue and part radiopaque portion of the guide (f ig .17); by subtracting the first image (high value) of the second image (low value), we obtain the soft tissue portion (fig.18); these parasites values ​​are eliminated (eg gray value out area of ​​the soft tissue part); then cleaned in the first image (high value), X-ray guide information; by melting and transferring files "new high value" (hard tissue part) and low (soft tissue part) (Fig.19), one can make a model representing the bone portion and soft tissue portion with a machine rapid prototyping (3D printer, stereo photography, ...) or any other machine capable of reproducing 3D bone portion and the lining of the patient (fig.20); is then carried out on the aforesaid model a docking station (fig.21). * Second procedure: one of the used model on which was carried out a mounting teeth in the laboratory; (fig. 2) this model, with its positioning reference is scanned in the laboratory; (Fig. 12) the model, the reference, and the radiation guide are then scanned assembly (24 fig.); correlation (fusion) between data in DICOM scanner and the scanner data to the laboratory will allow to change the radiological guide in surgical guide, allowing to define the model mucosal limit of desired areas; thanks to a tool machine has multiple axis we proceed to the reduction of model parts representing the mucosa portion; this reduction will be done in such a way that apart from the well-defined portions of the surface remain intact (Figure 25.); on the modified model the radiological guide is laid, which is stabilized through parts of leave intact surfaces; then injects a "curable" material remaining soft after reaction, in the "modified" areas (reduced) between the guide and the model (Fig. 26); thus obtaining a pattern with the same data as those bone and mucosa of the patient (Fig. 27).

Positioning / modeling (virtual) implants on the other hand is carried out, a second computer processing of X-ray images in two dimensions representing the aforementioned radiological guide in position on the jaw, so as to constitute a three-dimensional image, in order to insert in the images in two and three dimensions, per tooth, a virtual implant, compound (/ patterned) individually appropriate surgical position in the image of the jaw and a virtual guide device oriented co-axially to the implant virtual in the image of the radiological guide (fig. 22); these implants can be designed from databases with existing forms or be designed individually by patient's tooth; positioning the drill guide systems may in particular be made taking account of one or other procedures according to WO 2006/050584 or EP 06116963.7 mentioned above. - the radiological guide is then placed on the model obtained with its base (according to fig 21 or according to fig 27..) And provided with a reference part (e.g. a Lego block) outside of the guide area . with its reference model and the radiological guide is then scanned in the laboratory (Fig. 23).

Transformation of the radiological guide in surgical template from data collected and calculated by the computer during image processing steps and implant insertion compounds individually and virtually and virtual guide devices, then converting the X-ray guide surgical guide; is carried by a first drilling into each artificial tooth supported by the radiological guide, a first hole suitable for receiving a guiding device disposed and oriented as the guide device disposed and oriented along the virtual guide device corresponding one of the two images, and three dimensions, and by placing in each first drilled hole of such a guide device provided with at least one external reference. a second drilling, guided through each guide device sends a second hole through the model, with drills of the same peripheral dimensions as the final bit that will be used at the time of surgery (Fig. 28). in each second hole is placed an implant analogue by sliding in the guiding device of a similar holder, which carries the aforesaid analog implant to a depth corresponding to that of the virtual implant on the image in two and three dimensions and matching, by rotation of at least one second external reference provided on the analogue holder with said first external reference of the guide device. said implant analog has a neck dimensions corresponding to those of compound individually virtual implant selected for insertion in the images in two and three dimensions and corresponds to an actual implant to be placed in the patient's jaw; said implant analogue holder puts analogous to the neck at the same height as the neck of the implant individually compound for implanting said actual implant to be placed, the implant analog is fixed in the hole, as placed (fig. 29). after removal of each analogue holder and the surgical guide, a reference part is placed on the analog (Fig. 30). the model with its soft portion and its reference, and the analog and its reference are then scanned to obtain a three-dimensional position in space of the model and the like (Fig. 31). the model without the soft part and its reference, and the analog and its reference are then scanner to obtain a three-dimensional position in space of the model and the like (Fig. 32). the scanner data are then incorporated into a computer program with a positioning mark (e.g., LEGO block). - the model is then removed from the scanner and reference to the removed like.

Modeling abutment (s) then intervenes modeling (manual or computer) of abutment;

* In the case of a manual modeling a working insert is fixed in the analog model (three-dimensional model representing the bone and soft tissues, as shown in Fig. 21 or 27) on which a manual modeling of the abutment is performed taking into account all the mounting information (fig. 1) of the teeth projected. The shape of the abutment is made of a guide / reference ( "key") representing the position of the future teeth; during this shaping is carried out all parts supra gingival and then disassembles the abutment, the part is removed "soft tissue" model and repositions the abutment (fig. 34); we end finishing the abutment by joining the emergence of supra-gingival profile at the neck of the implant; in this operation into account the relief of the bony part represented on the model.

* In the case of computer modeling, realizing I 'abutment into account bone mass around the future implant models scanned image analysis in two and three dimensions and visualization of 3D model representing the bone portion and patient's mucosa; whole bone images and gum will create a correct emergence profile between the base of the implant and the output of the abutment of the gum (Fig. 35) while shaping the emerging portion of the support the prosthesis with its angulation and forms needed to match the predetermined mounting (fig. 5) with the patient. In the case of multiple implants and abutments it is also necessary (as in the case of a manual modeling as in the case of a computer modeling) that parallelism is maintained between the abutments to permit insertion of the future prosthesis.

In the case of manual modeling, the model with the reference, analog and abutment must be scanned again (Fig. 35).

The scan data are then incorporated into the computer program with an adequate positioning mark (e.g., a LEGO ® block); computer simulation of rotation is then executed to calculate the radius of rotation of the implant about its axis to face in the patient's bone and thereby define the feasibility of the shape of the implant (fig.36); this radius should be less than the space between the drill guide pins; in this radius must be included a minimum thickness for the wall of a future key screw; it is therefore possible during the feasibility check of the form of the abutment (fig. 37); if the central diameter of the boring device is smaller than the outer diameter of the key, the latter must be modified, preferably so as to meet the criteria of the techniques according to WO 2006/050584 or EP 06116963.7 mentioned above through the program computer can merge the data of each virtual implant with those of each abutment and into a single virtual part (fig. 38). these data are then transferred to a machining center with machine tools can achieve an implant abutments and in one piece made of titanium, zirconia parallel laboratory mill on the basis of abutments scanned a temporary or permanent prosthesis (regardless of the embodiment of the implant, and prior to placement of the implant).

Embodiment of the real implant in the machining center the individual implants are made in the bars or blocks of biocompatible materials such as Titanium, Zirconium, (Fig. 39). the data of the head (abutment) for each implant allow the machining center to create a male key according to the axis of the implant by incorporating parallel screwing polygons to the axis of the part which is positioned in intraosseous; the key face (female key) is designed to be time (fig .40) as soon as the implant head so modified (modeling of the male key), machining in one piece start bit. parallel to the machining of the implant a female screw is machined key on a second machine tools; this key will fit perfectly on the abutment and the male key; on its external part the key will be the diameter of the boring device and will be provided with a reference depth and rotation after machining of the implant and screwing the key adaptation of the assembly is checked custom drills are made of zirconia, steel, ... drills can be constructed so that the guidance of the drill bit will anticipatory drilling in a drilling device according to EP 06116963.7 mentioned above; it will result in at least one or several short drill and a final drill;

Investment products - the day of surgery a set of custom surgical guide, drills, implants, prosthesis and keys will be delivered as "investment Kit prosthesis".

The method according to the invention offers the great advantage of determining per image the position and shape of each of the implants to be implanted in an ideal position in the jaw, depending on the anatomical position (position of the mandibular nerve, sinus, etc. ). By suitable guiding (e.g. according to EP 06116963) can be reproducibly introduced into a template, and thereafter in the same manner in the jawbone, an implant analogue and respectively a similar implant. This introduction is still done so that the implant and the implant analogue are fixed in their support (model or jaw) with the fixed position on the images in two and three dimensions; that is to say the implant analogue and the implant (preferably one-piece type) are positioned with the same axial orientation and at the same depth; they are in a specific rotational position, which will be the same in both cases.

This new process allows precise management of bone mass and the mass mucosa around the implant, so the realization of the abutment will be done correctly. Part subgingival area does not hang on the bone part at the time of screwing into the patient's jaw.

The big advantage of an implant in one piece is that eliminates joint between the implant and the abutment. The implant will be built virtually depending on the patient's bone anatomy and thus consequently more appropriate to the patient. The fact of making an implant in one piece also has an impact on the completion time to last. It also eliminates an assembly of a multitude of parts (implant, abutment and screw). This process also as an important advantage that eliminate all stocks of implants and is consequently a huge progress in terms of production managements and cost management.

Claims

1. A method of manufacturing a dental prosthesis and a surgical guide relating to them, by making the prosthesis and / or the surgical guide on the basis of a first physical model obtained from an impression of the jaw of a patient and a "radiological guide", obtained by computer modeling from radiographic data, fitting on said first pattern, and used to produce a radiographic image of the patient's jaw, characterized in that a second model physical, reproducing, from a first material, the bone parts of the jaw and a second material softer than the first material, mucosa parts of the jaw, is carried out on computer modeling base mucosa and bone parts parts jaw by differentiation radiographic data.
2. Method according to claim 1, characterized in that said X-ray guide understand parts by radiopaque material corresponding to the shape of teeth provided for the prosthesis to be produced and to spaces between said first model and said teeth.
3. Process according to either of the preceding claims, characterized in that said second model is obtained by modifying said first model, based on said computer modeling portions mucous membranes and bone parts of the jaw by differentiating data X-ray, so as to reproduce the bone parts of the jaw, and is covered by molding on said first modified pattern with respect to said "radiological guide", a less hard material than the first relatively soft model so as to reproducing mucosa parts of the jaw.
4. Process according to either of the preceding claims, characterized in that it comprises individualized modeling step, virtual, components of one or more implants for said dental prosthesis, according to said computer modeling from X-ray data, and optionally according to said physical model reproducing mucosa parts and the bone parts of the jaw of a patient, and individualized embodiment, one piece of each implant by melting the modeling data Virtual their components.
5. The method of claim 4, characterized in that it comprises a modeling step on the physical model reproducing mucosa parts and the bone parts of the jaw.
6. The method of claim 5, characterized in that the modeling of the shape of the abutment is performed by means of a "key" representing the position of future teeth.
7. Process according to either of the preceding claims, characterized in that it comprises individualized embodiment, in one piece, of an implant for said dental prosthesis by machining bar or pads of biocompatible material, using a virtual piece obtained by computer modeling data fusion of its components.
8. Process according to either of the preceding claims, characterized in that it serves for the production of a "kit" individualized, ready to use, for the placement of a dental prosthesis, comprising prosthetic, a surgical guide relating thereto, one or more implants for denture and one or more screwing keys for placement or implants, and optionally one or more bits.
9. Investment kit for a dental prosthesis, comprising at least one prosthesis, the surgical guide relating thereto, one or more implants for or replacement (s) and one or more screwing keys for placement or implants, and optionally one or more drill bits, characterized in that 1 for one or more implants are formed in one piece, on the basis of virtual coins obtained by computer modeling data fusion of their constituent elements, and implants, drills and / or key screwing are formed individualized manner to said prosthesis according to the morphology of the jaw to which the prosthesis is intended.
10. Investment kit for a dental prosthesis, comprising at least one prosthesis, the surgical guide relating thereto, one or more implants for or replacement (s) and one or more screwing keys for placement or implants, and optionally one or more drill bits, characterized in that it comprises one or more pieces fabhquée (s) by a computer modeling method mucous parts and bone parts of the jaw by differentiation radiographic data, according to one or the other of claims 1 to 7.
EP20080803134 2007-08-24 2008-08-21 Method for making a dental prosthesis and related surgical guide Withdrawn EP2192873A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07114952 2007-08-24
PCT/EP2008/060963 WO2009027316A4 (en) 2007-08-24 2008-08-21 Method for making a dental prosthesis and related surgical guide
EP20080803134 EP2192873A1 (en) 2007-08-24 2008-08-21 Method for making a dental prosthesis and related surgical guide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080803134 EP2192873A1 (en) 2007-08-24 2008-08-21 Method for making a dental prosthesis and related surgical guide

Publications (1)

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EP2192873A1 true true EP2192873A1 (en) 2010-06-09

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EP20080803134 Withdrawn EP2192873A1 (en) 2007-08-24 2008-08-21 Method for making a dental prosthesis and related surgical guide

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US (1) US20110136077A1 (en)
EP (1) EP2192873A1 (en)
JP (1) JP2010536450A (en)
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