EP2579801A2 - Dispositif de positionnement d'analogue - Google Patents

Dispositif de positionnement d'analogue

Info

Publication number
EP2579801A2
EP2579801A2 EP11724971.4A EP11724971A EP2579801A2 EP 2579801 A2 EP2579801 A2 EP 2579801A2 EP 11724971 A EP11724971 A EP 11724971A EP 2579801 A2 EP2579801 A2 EP 2579801A2
Authority
EP
European Patent Office
Prior art keywords
analog
holder
intermediate piece
connection
receiving
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Withdrawn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
EP11724971.4A
Other languages
German (de)
English (en)
Inventor
Silvio Blumenthal
Steffen Kuehne
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.)
Straumann Holding AG
Original Assignee
Straumann Holding AG
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
Application filed by Straumann Holding AG filed Critical Straumann Holding AG
Priority to EP11724971.4A priority Critical patent/EP2579801A2/fr
Publication of EP2579801A2 publication Critical patent/EP2579801A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0022—Self-screwing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0089—Implanting tools or instruments
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers

Definitions

  • the present invention relates to a
  • Analog positioner comprising a holder and an adapter for positioning an implant analog in a model and a set comprising the analog positioner and at least one analog.
  • dental implants as artificial replacement for tooth roots has become established in recent years.
  • various forms of dental implants with in particular the helical implants (eg WO 97/49351) having proven themselves.
  • dental implants made of titanium or various ceramics are used.
  • Screw-shaped dental implants usually consist of an anchoring part for anchoring the implant in the bone and a mounting part on which a superstructure can be attached. If anchoring part and body part are formed as a single component, it is a one-piece implant. If the anchoring part and the mounting part are designed as two separate components, this is called a two-part implant.
  • the implant is screwed into a suitable borehole in the patient's jaw.
  • a superstructure, a prosthetic element, a bridge, crown or - in the case of a two-part implant - a tertiary part is then attached to the abutment part of an implant.
  • CONFIRMATION COPY For the preoperative planning of a surgical procedure in which an implant is implanted in the jaw of a patient, a model of the jaw or the implantation site and its surroundings has proven to be very useful. First, a CT scan of the patient's jaw is made and the exact location and orientation of the implant (s) to be placed are determined on the computer using suitable software. Based on this planning, a model of the jaw or the implantation site and its surroundings is then made, for example by means of 3D plotting.
  • the model is preferably made directly with "drill holes" at the planned implantation sites, but it is also possible to initially make the model without drilling holes and then to drill the same Alternatively, the boreholes may be made by hand on the basis of computer planning, in which case the borehole will usually be made slightly larger than what is actually needed for the analog, so the analog is also useful a certain hole in the model can still be brought into the correct position and fixed in the model, whereby a possible cavity around the analogue is filled up with a suitable filling material
  • Bohr holes all holes in the model, irrespective of their manufacture, are referred to as " Bohr holes ".
  • the model can be helpful in checking the implant axis, choosing the implant, determining the abutment, and making the superstructure.
  • one or more implant imitations or replica so-called analogs.
  • the analog essentially consists of the same parts as an implant. Normally, for each embodiment of an implant, a corresponding analogue is used whose size and shape coincide with those of the implant.
  • the analog thus comprises an anchoring part intended to be anchored in a model.
  • the analog has a receiving means, which corresponds to the respective implant, for receiving a body part or a superstructure.
  • the analogue is used at the planned location in the previously prepared wellbore in the model, using coordinates determined at the computer.
  • a mounting part and / or a superstructure as used for the reconstruction of the row of teeth, can then be inserted into the receiving means of the analog.
  • the construction as it should be used for the implantation, can be imitated.
  • the aesthetic aspects of the prosthesis for example the dimensions of a crown, can also be checked herewith.
  • WO2009 / 105508 describes a method for inserting a dental implant analog into a model.
  • a robot first processes the model and produces a drill hole for the implant analog. Subsequently, the robot places the analog at the planned implantation site, which is usually determined beforehand using a three-dimensional computer model.
  • a surgical template is usually used to prepare the "proper" hole in the jawbone during surgery.These surgical guides are used to guide dental drills and prevent them from slipping or kinking during the drilling process
  • the template can also be used with the model by placing it on the row of teeth on the model, then using the template to drill the hole in the model for the analog and then drill the template then the analogue will be placed.
  • the dimensions of the analog to be placed in the model are preferably consistent with the dimensions of the implant to be used for the surgical procedure.
  • the model is first drilled to a hole that closely matches the position, orientation and depth of the intended implant bore in the patient's jawbone. If appropriate, this is done with the aid of a previously made drilling template or a computer-controlled drilling device.
  • the model can be fabricated with the "holes", for example, by 3D plotting, and then the analog is inserted into the hole.
  • the analog downhole may be difficult for less experienced users by hand because the analog is only a few millimeters long and the borehole is often located in hard to reach areas in the model. If the analogue is set by hand, it may in particular happen that its position is too inaccurate. But for optimal implantation it is of It is of the utmost importance that the position, orientation (in the direction of rotation), inclination and depth of the analog in the model correspond exactly to the position determined on the computer.
  • the present invention relates to a
  • Analog positioner for positioning an analog in a model.
  • the inventive analog positioner comprises a holder and at least one intermediate piece for temporarily fixing the analog to the holder.
  • the holder comprises a shaft with a receiving portion for receiving in a receiving means of a computer-controlled positioning unit and an axially adjoining positioning portion.
  • the latter has a fastening unit preferably for releasably connecting the intermediate piece to the holder.
  • the receiving portion is arranged on a first holder end and the fastening unit on a, the receiving portion axially opposite the second holder end.
  • the positioning section has a reference element.
  • the intermediate piece has a longitudinal axis, a first end having a holder receiving portion for releasably connecting the intermediate piece to the mounting unit of the holder, and a second end axially opposite the first end having an analog receiving portion for temporarily receiving the analog.
  • the inventive analog positioner makes it possible to use the analog in the model using a computer-controlled positioning unit.
  • a calibration of the computer-controlled positioning unit can be carried out. Thereafter, the inventive
  • Analog positioner which allows the recording and positioning of the analog obtained by attaching the intermediate piece to the holder, without having to make a change or exchange of tools on the computer-controlled positioning unit.
  • inaccuracies in placing the analog and in particular a loss of calibration accuracy can be avoided, so that the fully assembled model the user a precise visual impression of the later Conditions in the patient's mouth.
  • the model with the used analogues serves the user in particular as a basis for the production of tailor-made crowns and body parts.
  • the holder of the analog positioner is connected to the computer-controlled positioning unit by anchoring the receiving portion arranged on its shaft in the receiving means of the computer-controlled positioning unit.
  • the holder is preferably fastened by means of a snap closure on the receiving means of the computer-controlled positioning unit.
  • the holder is connected to the receiving means of the computer-controlled positioning unit, for example, by screwing or by a bayonet lock.
  • a calibration preferably by an adjustment of the reference element with a zero level, which assumes a predetermined position relative to the computer-controlled positioning unit, be made.
  • the holder is positioned by the positioning unit so that the reference element is in contact with the zero level.
  • Positioning unit adjusted, eg set to 0.
  • This value is preferably stored internally by the computer-controlled positioning unit so that it is available for a subsequent positioning of an analog or possibly for multiple positions.
  • an intermediate piece on the holder attached so that now the inventive analog positioner attached to the positioning unit and is available calibrated.
  • the dimension and exact arrangement of the intermediate piece on the holder is preferably known and is taken into account during the subsequent positioning by the computer-controlled positioning unit.
  • the first end of the intermediate piece is first attached to the second holder end.
  • the holder receiving portion of the intermediate piece is thereby fixed by means of the fixing unit to the holder.
  • the analog is attached to the second end of the intermediate piece by means of the analog recording area. It is important that the intermediate piece or the analog can not move during the positioning process relative to the holder or only minimally. Unwanted loosening of the analog of the intermediate piece or the latter of the holder is prevented by the interaction of the analog with the analog recording area or by the interaction of the holder receiving portion with the fixing unit.
  • a displacement between the analog and the intermediate piece is preferably prevented by frictional engagement and / or positive locking and displacement between the intermediate piece and the holder, preferably by positive locking.
  • analog can also be connected directly - without adapter - with the second holder end.
  • the reference element on the positioning section of the analog positioner serves to inform the computer-controlled positioning unit about the location and arrangement of the holder, and thus also the intermediate piece or analog to deliver.
  • the reference element can convey information about the position in space (in particular about the height), the inclination or the orientation in the direction of rotation. This allows the computer-controlled positioning unit to "orient" in space, ie, calibrate appropriately, so that the analog can be placed exactly at the desired location in the model ..
  • the analogue positioner analog is moved in space by the computer-controlled positioning unit After this actual positioning, the analog is fixed in the prepared hole of the model, for example by
  • the analog is temporarily (i.e. for a limited period of time - attached to the spacer.
  • the period of temporary fixation is typically in the
  • the value of the calibration is preferably stored, it is not absolutely necessary that the positioning process must be completed after a few minutes: it can also be interrupted and possibly completed on a subsequent day.
  • releasably connecting means that the holder can be removed from the intermediate piece, without the holder, in particular its fastening unit, or the spacer may be damaged. Thus, both the holder and the intermediate piece can be used several times, if desired.
  • the analog which is usually formed substantially circular cylindrical, is on
  • the analog is preferably attached with its coronal end on the intermediate piece, ie with the end corresponding to the coronal end of a dental implant.
  • that end of the analog corresponding to the anchoring part of the implant and intended for insertion into a borehole in a model is directed away from the spacer or analog positioner. This allows for easy insertion of the analog into the wellbore in the model.
  • Analogpositionierers be placed by the analog another analog in another well. For this purpose, the same intermediate piece can be used again.
  • the model which is finished with the analogues, can give the user a precise visual impression of the later conditions in the patient's mouth and, in particular, serves the user as a basis for the production of tailor-made crowns and body parts.
  • the force is referred to, which must be used in the axial direction in order to solve the holder, respectively the analogue, from the intermediate piece.
  • the analog positioner is through the connection between the intermediate piece and the holder a defined first withdrawal force, which is the minimum force to be applied in the axial direction to remove the intermediate piece from the holder.
  • the intermediate piece and the holder are preferably designed such that the connection between the intermediate piece and the holder is formed by joining in the axial direction.
  • the axial direction for joining the above-mentioned axial direction for removing the intermediate piece is opposite.
  • the holder is connectable by means of a snap closure with the intermediate piece.
  • a snap connection between the holder receiving area and the fastening unit of the holder is formed.
  • a snap closure allows easy insertion of the intermediate piece and later equally simple removal, while at the same time a secure connection to the holder during the actual positioning process can be ensured.
  • the snap connection is designed such that the holder receiving area elastically deformed during the attachment of the intermediate piece and then returns to the starting position.
  • the Snap connection which is preferably achieved or closed by force along the longitudinal axis of the intermediate piece, is a simple and quick to create connection, which is also easily solvable. It allows a problem-free fixing of the holder on the intermediate piece and can be solved at the desired time just as effortlessly. In addition, no further fasteners or similar tools are needed, which could affect a precise guiding of the analog positioner.
  • the holder receiving portion can also be connected by a screw cap or a bayonet lock with the mounting unit of the holder. Also in the axial direction positive connections are possible, such as a dovetail connection, in which the holder is mounted radially on the intermediate piece.
  • the reference element is arranged on the second end of the holder.
  • the arrangement of the reference element on the receiving portion axially opposite end face of the holder facilitates the calibration in space and increases the accuracy:
  • the reference element can for example be easily brought into contact with a desired zero level, for example by being supported on it.
  • the reference element of the holder is part of the fastening unit.
  • the reference element can also assume a fastening function.
  • the reference element alone or in combination with one or more others Fasteners form the attachment unit.
  • the reference element is for calibrating the computer-controlled positioning unit with respect to a zero level.
  • the reference element is brought into contact with a zero level in the room before the introduction of an analog into the model, thus calibrating the system.
  • the latter is enabled to correctly position the analogues in the model in an automatic procedure.
  • the reference element and / or the fastening unit comprises a ball head.
  • a spherical reference element can be very easily brought into contact with a zero level in the room and allows a simple calibration of the positioning unit, since in particular the height determination by means of trigonometry is relatively easy to carry out.
  • the reference element could also be designed, for example, circular-cone, needle or mandrel-shaped.
  • a reference element with a fine as possible but stable tip would be advantageous because in this the contact point at a relatively large number of zero levels with different inclinations remains unchanged.
  • the reference element is part of the fastening unit and comprises the ball head, the latter preferably serving both as a reference element and at least as part of the fastening unit.
  • the holder receiving region comprises a cap and a hollow cylindrical receiving region with a substantially circular cylindrical cross section.
  • the inner diameter of the receiving area corresponds to the maximum outer diameter of the ball head.
  • the cap and the hollow cylindrical receiving areas are preferably arranged along the longitudinal axis of the intermediate piece.
  • the intermediate piece can be very easily connected to the ball head, for example with a snap closure or by means of spring fingers, and can also be easily solved by this again.
  • the force required to release the connection between the ball head and spacer should be chosen so that the adapter, and thus the analog, can not unintentionally detach from the holder, but that the user can muster this force easily, preferably without further aids ,
  • a snap closure is particularly preferred when the fastener has a ball head.
  • the hollow cylindrical receiving portion of the intermediate piece has two or more spring fingers and / or a snap-action nose at its front end.
  • the ball head of the holder is in the connected state of these spring fingers held and / or he forms a snap connection with the spacer.
  • the holder receiving area has at least two, preferably four spring fingers. Between the spring fingers of the number of spring fingers corresponding number of slots, recesses or passages is formed.
  • the spring fingers are made of an elastic material.
  • the hollow cylindrical Aufme Bachelor preferably has at an end face, d. H. at the end directed towards the cap, a snap-on nose.
  • This snap-action nose is preferably in the form of an inwardly directed, circumferentially extending projection and is slipped over the ball head when connecting to the holder.
  • the intermediate piece can also be connected to the fastening unit of the holder by means of a screw cap or bayonet closure, for example.
  • the fastening unit of the holder preferably comprises a stop surface for the intermediate piece.
  • This stop surface serves to prevent the intermediate piece in the axial direction moves too far in the direction of the receiving portion of the holder.
  • the stop surface can also serve to fix the intermediate piece in the radial direction.
  • the stop surface is at least approximately annular or circular.
  • the intermediate piece accordingly has a cap with a front end which is shaped to be complementary to the stop surface.
  • the outer radius of the Stop surface is adapted to the outer radius of the front end of the intermediate piece.
  • the abutment surface is in the connected state in contact with the front end.
  • the front end of the cap is preferably also approximately annular.
  • the described embodiment allows a simple insertion of the holder on the intermediate piece and later equally easy removal of the holder from the intermediate piece, while at the same time a secure connection to the holder during the setting of the analog can be ensured.
  • This embodiment has the advantage that the snap connection centers itself.
  • the outer radius of the stop surface is adapted to the outer radius of the analog.
  • the stop surface in the radial direction does not protrude significantly beyond the intermediate piece or the analog, so that the holder can also be used to position an analog in limited space, for example, when the planned implantation site between two existing teeth is located.
  • the holder must also have a certain minimum diameter in order to guarantee a sufficiently high stability and ease of handling of the holder.
  • the outer diameter of the stop surface is therefore the same size or the same order of magnitude as the outer diameter of the intermediate piece or analog, for example, slightly larger or slightly smaller.
  • the stop surface has a different shape, for example the shape of a polygon.
  • the analog positioner additionally comprises a computer-controlled positioning unit.
  • the present invention relates to a set comprising at least one analog positioner according to the invention and additionally at least one analog.
  • the outer diameters of standard analogs usually correspond to the outer diameters of the standard dental implants used.
  • Typical outer diameters of dental implants are, for example, 5.0 mm and 2.8 mm.
  • a set with only one holder can in principle be used to position an analog with any outside radius: the adapter alone is adapted to the size and shape of the analog.
  • the set comprises at least two intermediate pieces, wherein the intermediate pieces are each adapted to different analogs which have, for example, different external radii.
  • the set has two or more holders, for example, one of which is a particularly narrow holder, which is particularly suitable for hard to reach places, for example, between two existing teeth.
  • connection By the connection between the intermediate piece and the analog a second withdrawal force is defined, which is the minimum force to be applied in the axial direction to remove the intermediate piece from the analog.
  • the connection is preferably such that it is formed by assembling the intermediate piece and the analog in the opposite axial direction. This makes the connection easy and quick to create and solve. It allows easy fixation of the analog on the adapter and can be solved at the desired time just as effortlessly. In addition, no further fasteners or similar tools are needed, which could affect a precise guiding of the analog positioner. In addition, the connection is also easy to create and solve by a computer-controlled positioning unit.
  • the holder, adapter and analog are connected together. After inserting the analog into the model, the analog positioner is again released from the analog.
  • the force that has to be applied for releasing the connection between analog and intermediate piece smaller than that which is necessary for releasing the connection between the holder and intermediate piece, so that the entire analog positioner can be easily separated from the analog.
  • the peel force for releasing the connection between the holder receiving area and the holder is about 5 to 8 N, for example 6 N, and that for releasing the connection between analog recording area and analog about 2 to 5 N, for example, 3 N.
  • the withdrawal force for releasing the connection between the holder receiving area and the holder is greater than that for releasing the connection between analog recording area and analog, so that the intermediate piece can first be separated from the analog and then from the holder, if desired.
  • the analogue recording area of the intermediate piece is intended for fixing an analogue, wherein preferably the coronal end of the analogue, ie the end with a receiving means for a superstructure, a prosthetic element, a bridge, crown or - in the case of a two-part implant - a tertiary part, with is connected to the analog recording area of the intermediate piece.
  • the analogue sensing area is substantially circular cylindrical and is used to connect to the analogue receiver
  • a receiving means may, for example, take the form of a blind-hole-shaped depression with a substantially circular-cylindrical cross-section at the coronal end of the analog
  • the outer diameter of the analog recording area and the receiving means of the analog correspond to a detachable connection
  • the receiving means of the analogue it would also be possible for the receiving means of the analogue to have an internal thread, for example by means of snap-fit or friction locking f réelle and the intermediate piece is screwed in.
  • This first embodiment is particularly preferred for receiving an analog that is substantially completely buried in the model (as well as the so-called. Level implants in the bone): Thanks to the internal connection between adapter and analog, for example by means of "cross-fit" For example, the spacer in the region adjacent to the coronal end of the analog in the connected state has a smaller outside diameter than the analog, so that it does not interfere with the complete insertion of the analog into the model from the intermediate to the analog by simply pulling back the analog positioner linearly.
  • the analog recording area of the intermediate piece has at least two, preferably four, slits running in the axial direction, so that spring fingers are formed on the analogue area.
  • the length of these slots the choice of the material of the intermediate portion or the analog recording area, as well as the size of the surface which is in the connected state with the analog in contact, the peel force for releasing the connection between analog and adapter can be influenced.
  • the analog receiving area of the intermediate piece is substantially hollow cylindrical in shape and receives an insertion area of the analog for connection to the analog.
  • a snap connection between the intermediate piece and the analog is preferably formed.
  • the intermediate piece preferably comprises an implant shoulder shouldered, annular outwardly projecting projection in the region of the coronal end of the analog.
  • the insertion region of the analogue is therefore preferably substantially cylindrical.
  • Analog recording preferably at its executed to the analog front end, an annular snap-on rib.
  • This allows the formation of a snap connection between adapter and analog, which allows easy attachment and detachment.
  • the peel force for releasing the connection between analog and adapter can be influenced.
  • a set preferably contains at least one intermediate piece according to the first preferred
  • Embodiment of the analog recording area for insertion into a recording means of an analog, i.e. for an internal connection) and at least one intermediate piece according to the second preferred embodiment of the analog recording area (for insertion into a recording means of an analog, i.e. for an internal connection) and at least one intermediate piece according to the second preferred embodiment of the analog recording area (for insertion into a recording means of an analog, i.e. for an internal connection) and at least one intermediate piece according to the second preferred embodiment of the
  • Analog recording area for recording an insertion area of an analog, ie for an external connection.
  • the at least two intermediate pieces it is also possible, for example, for the at least two intermediate pieces to be intended for connection to analogs whose receiving means or insertion region has a different inner or outer diameter; In this case, the analog recording areas of the at least two intermediate pieces have a different diameter.
  • any other combinations of inventive spacers - the first or second preferred embodiment and with different diameters of the analog recording area - for the formation of a set are possible.
  • the analogs are selected based on the implant types intended for use by a single patient.
  • the selected analogs or analog types influence the selection of the spacers and holders to be used.
  • the thus selected analogs, spacers and holders are combined in a set according to the present invention, so that for the Producing a model for a particular patient is provided an individually tailored set.
  • the present invention relates to a holder for an analog positioner.
  • the holder is made of stainless steel.
  • Stainless steel is easy to shape and guarantees sufficient stability of the holder.
  • a holder made of stainless steel can be easily cleaned and can be used several times.
  • the holder can also any other material that has a sufficiently high stability and so during the
  • the holder can also be made of a metal or a metal alloy, a ceramic or a sufficiently strong plastic.
  • the present invention relates to a holder according to the alternative embodiment, according to which the holder is adapted to be connected directly to the coronal end of the analog.
  • the analog preferably has a calibration element for height determination, and the reference element on the holder serves to determine the orientation of the analog in the direction of rotation.
  • a reference element for transmitting the information about the orientation of the analog in the direction of rotation may be formed, for example, as a notch or projection in the holder.
  • An analog of a dental implant is - like the dental implant itself - usually not complete rotationally symmetrical with respect to its longitudinal axis.
  • a dental implant with a helical anchoring part on an external thread which naturally extends spirally around the implant and has a beginning or an end.
  • the coronal end region of the implant or analog is not rotationally symmetrical, so that an element to be fastened thereto (a supraconstruction, a prosthetic element, a bridge, a crown or - in the case of a two-part implant - a tertiary part) only in one certain orientation can be attached to it.
  • an element to be fastened thereto a supraconstruction, a prosthetic element, a bridge, a crown or - in the case of a two-part implant - a tertiary part
  • the orientation of the analog in the direction of rotation is therefore also an information which is indispensable for correct positioning and which can be transmitted to the computer-controlled positioning unit by means of the abovementioned reference element.
  • the analog is previously connected to the holder according to the invention according to the alternative embodiment, so that the corresponding information by means of the calibration element on the analog - which is otherwise preferably arranged at the apical end and particularly preferably has the shape of a ball head - can be determined.
  • the analog can be placed correctly in the model using the computer-controlled positioning unit in an automated process.
  • the analog is preferably fastened to the holder with a snap closure or by means of spring fingers. So the analog can simply be plugged in and just as easily released again Holder to be solved.
  • the force necessary to release the connection between the holder and the analog should be chosen so that the analog can not unintentionally come off the holder, but that the user can easily apply this force, preferably without any further aids.
  • the analog but for example, by a screw cap or Ba onettverInstitut be connected to the mounting unit of the holder.
  • the attachment unit of the holder comprises a stop surface for the analog. This stop surface serves to prevent the analog in the axial direction moves too far in the direction of the receiving portion of the holder.
  • the stop surface can also serve to fix the analog in the radial direction.
  • the stop surface is at least approximately annular or circular and the outer radius of the stop surface adapted to the outer radius of the analog. It is particularly advantageous that the stop surface in the radial direction does not protrude significantly beyond the analog, so that the holder can also be used to position an analog in limited space, for example, when the planned implantation site is between two existing teeth.
  • the stop surface on the holder but also serves to the coronal end of the analog during anchoring of the analog in the model before the material used for anchoring, for.
  • the outer diameter of the stop surface is therefore equal to or slightly larger than the outer diameter of the analog.
  • the stop surface 5 has a different shape, for example the shape of a polygon.
  • the holder according to the alternative embodiment is made of stainless steel.
  • Stainless steel can be easily in0 the desired shape and ensures sufficient stability of the holder.
  • a holder made of stainless steel can be easily cleaned and can be used several times.
  • the holder can also any other material that has a sufficiently large 5 stability and so during the
  • the holder can also be made of a metal or a metal alloy, a ceramic or a sufficiently strong plastic.
  • the present invention also relates to a set comprising at least one holder according to the alternative embodiment and at least one analog which is releasably connectable to the holder 5.
  • the set comprises at least two holders according to the alternative embodiment, their attachment units having a different outer radius.
  • this set also includes at least two analogs whose outer radii are adapted to the outer radii of the fastening units.
  • these sets according to the invention additionally comprise a computer-controlled positioning unit.
  • the present invention relates to an adapter for an analog positioner.
  • an intermediate region which can facilitate the handling and in particular the gripping of the intermediate piece.
  • an intermediate region is also arranged along the longitudinal axis and designed substantially circular cylindrical.
  • the maximum diameter of the intermediate area should be smaller than the maximum diameter of the holder and / or the analog to which the intermediate piece is to be connected. This will prevent the spacer from becoming wedged in the model when inserted into the well.
  • too small a diameter of the intermediate portion is not desirable for practical reasons, because too narrow an intermediate portion could make it difficult to grasp and place the intermediate piece with bare fingers.
  • the intermediate area need not be the same over its entire length (parallel to the longitudinal axis).
  • the outer diameter of the intermediate region preferably tapers toward the holder receiving region and towards the analogue receiving region.
  • the intermediate piece according to the invention consists of plastic, in particular of polyetheretherketone (PEEK). Suitable plastics are particularly easy to bring in the desired shape and are also sufficiently elastic to allow the function of the spring fingers.
  • the intermediate piece according to the invention also comprises a reference element which serves to provide the computer-controlled positioning unit with information about the orientation of the analog in the direction of rotation.
  • a dental implant and thus also a corresponding analog, is not completely rotationally symmetrical with respect to its longitudinal axis. It may therefore be important that the implant or analog is placed in a particular rotational orientation in the bone or model.
  • the computer-controlled positioning unit In order for the computer-controlled positioning unit to be able to control this alignment in accordance with the previous planning, it first has to "know" which position the analog is in relation to the rotation
  • a corresponding reference element on the intermediate piece can, for example, be in the form of a groove, slot or projection
  • the reference element interacts with corresponding counter elements on the analog or on the holder
  • the present invention also relates to the use of the analog positioner for positioning an analog in a hole in a model or the use of the holder according to the alternative embodiment for temporarily receiving an analog and for positioning the analog in a borehole in a model.
  • Fig. 1 is a perspective view of a holder together with an intermediate piece and an analog, wherein the holder, intermediate piece and analog are not connected;
  • Fig. 2 is a longitudinal section through the holder
  • FIG. 3 shows a side view of a first embodiment of an intermediate piece according to the invention
  • Fig. 4 is a longitudinal section through the intermediate piece
  • FIG. 3
  • Figure 5 is a perspective view of the holder, the intermediate piece and the analog of Figure 1, wherein holder, adapter and analog are connected to each other.
  • Fig. 6 is a longitudinal section through the holder
  • Adapter and the analog of Figure 5; and 7 shows a longitudinal section through a second embodiment of an inventive intermediate piece.
  • FIG. 1 shows a perspective view of an inventive analog positioner comprising a holder 10 and an intermediate piece 210 and an analog 14 of a dental implant.
  • the holder 10 shown, the intermediate piece 210 and the analog 14 are not connected to each other.
  • Figure 1 thus shows the individual parts prior to assembly and prior to positioning of the analog 14 in a model.
  • Figure 2 shows a longitudinal section through the holder 10, the intermediate piece 210 and the analog 14 of Figure 1, which are also shown here in a separate state.
  • the features of the parts shown in FIGS. 1 and 2 (holder 10, intermediate piece 210 and analog 14) are therefore described jointly below:
  • the holder 10 shown is made of stainless steel. Alternatively, however, the holder 10 could be made of any other suitable material, such as metal, an alloy, a ceramic or a suitable plastic.
  • the holder 10 comprises a shaft 16 with a receiving portion 18 and an axially (relative to the longitudinal axis A) subsequent thereto positioning portion 20.
  • the receiving portion 18 is intended to be inserted into a receiving means of a computer-controlled positioning unit (not shown), and is substantially circular cylindrical. It is the Receiving portion 18 anchored by means of a snap closure in the receiving means of the computer-controlled positioning unit.
  • the positioning portion 20 of the holder 10 comprises a fixing unit 22 having an annular stop surface 24, a cylinder portion 26 and a ball head 28.
  • the fixing unit 22 serves to releasably connect the intermediate piece 210 with the holder 10.
  • the fastening unit 22 may have an inner or outer thread or a bayonet closure (not shown).
  • Figure 3 shows a side view of a first embodiment of an inventive intermediate piece 210 according to the first preferred embodiment.
  • Figure 4 shows a longitudinal section of the same intermediate piece 210 along the axis A-A. For the sake of simplicity, therefore, these two figures will be discussed together.
  • the illustrated intermediate piece 210 which consists for example of PEEK, has a longitudinal axis 218, a first end 211 and a first end 211 axially opposite second end 213. Disposed at the first end 211 is a holder receiving portion 212 for releasable connection to a holder and at the second end 213 an analog receiving portion 216 for temporarily receiving an analog.
  • the Holder receiving portion 212 includes a cap 220 and a hollow cylindrical receiving portion 222.
  • the intermediate piece 210 has an intermediate region 214.
  • the holder receiving portion 212, the intermediate portion 214 and the analog receiving portion 216 are substantially circular cylindrical.
  • the holder receiving area 212, the intermediate area 214 and the analog receiving area 216 are arranged along the longitudinal axis 218, wherein the intermediate area 214 lies longitudinally between the holder receiving area 212 and the analog receiving area 216.
  • the holder receiving portion 212 further has four passages 224, which extend partially over the cap 220 and the cylindrical receiving portion 222 and are distributed regularly in the circumferential direction. In the region of the hollow cylindrical receiving region 222, the passages 224 extend substantially parallel to the longitudinal axis A and extend virtually over the entire length of the receiving region 222. Between the passages 224, four spring fingers 226 are formed in the hollow cylindrical receiving region 222 in the circumferential direction extend over the cap 220. Alternatively, spring fingers 226 and the passages 224 may also extend completely over the hollow cylindrical receiving area 222 and the cap 220.
  • the intermediate piece 210 shown in FIGS. 3 and 4 has a closed ring at the outer end of the holder receiving region 212.
  • the intermediate region 214 of the intermediate piece 210 shown in FIGS. 3 and 4 is substantially configured circular cylindrical, with its outer diameter to the holder receiving portion 212 and the analog receiving portion 216 tapers.
  • the maximum diameter of the intermediate region 214 is smaller than the maximum diameter of the holder 10 and / or the analog 14 with which the intermediate piece 210 is to be connected. This will prevent the adapter 210 from becoming wedged in the model during insertion into the wellbore.
  • too small a diameter of the intermediate portion 214 is not desirable for practical reasons.
  • the diameter of the intermediate portion 214 allows easy handling, in particular easy gripping and placing of the intermediate piece 210 with bare fingers.
  • the analog receiving region 216 of the intermediate piece 210 according to FIGS. 3 and 4 is substantially circular-cylindrical and has a concentric blind hole 230 along the longitudinal axis 218.
  • four slots 232 are formed in the axial direction in the hollow cylindrical analog receiving area 216.
  • Figure 5 shows a perspective view of the inventive holder 10, wherein this is connected via the intermediate piece 210 with the analog 14 of Figure 1.
  • FIG. 6 shows a longitudinal section through the same arrangement.
  • the cylinder portion 26 of the holder 10 is when placing the intermediate piece 210 in the
  • Holder receiving portion 212 of the intermediate piece 210 is inserted and prevents in the assembled state that the intermediate piece 210 relative to the holder 10 in the radial direction (ie perpendicular to the longitudinal axis A) moves.
  • the annular stop surface 24 prevents the intermediate piece 210 can move in the assembled state in the axial direction of the receiving portion 18 through.
  • the holder receiving portion 212 may be connected to the holder 10 by means of a snap connection.
  • the ball head 28 of the holder 10 is inserted through the cap 220 into the hollow cylindrical receiving area 222 between the spring fingers 226.
  • Each of the four spring fingers 226 has a snap-action nose 228.
  • the ball head 28 of the holder 10 comes into contact with the snap lugs 228. Due to the elasticity of the spring fingers 226, the snap lugs 228 can be pushed radially outwards during connection and release of the ball head 28 and thus undergo a deflection. Finally, the ball head 28 comes to lie completely in the hollow cylindrical receiving area 222.
  • a first end of the cap 220 is in the connected state in contact with the abutment surface 24 of the mounting unit 22 of the holder 10.
  • the inner diameter of the front end of the cap 220 corresponds to the inner diameter of the stop surface 24, and the outer diameter of the front end of the cap 220 corresponds to the outer diameter the stop surface 24.
  • the cylinder portion 26 of the fastening unit 22 of the holder 10 inserted in the cap 220.
  • the ball head 28 assumes a dual function: on the one hand, it serves as a reference element for calibrating the computer-controlled positioning unit with respect to a zero level, i. for determining the position of the holder 10, in particular its height. On the other hand, the ball head 28 also serves as a fastening unit 22.
  • the analogue receiving portion 216 of the intermediate piece 210 is introduced into a receiving means of the analogue 14.
  • An internal connection is formed.
  • the receiving means of the analog 14 preferably comprises a blind hole-shaped depression with a substantially circular cylindrical cross-section at the coronal end of the analog 14.
  • the analog recording area 216 is introduced into this receiving means. In this case, the outer ends of the analog recording area 216 are compressed, that is, deflected toward the longitudinal axis 218 of the intermediate piece 210.
  • the releasable connection between adapter 210 and analog 14 is based on a frictional engagement between the analog recording area 216 and the recording means of the analog 14. It allows a simple and fast fixing of the analog 14 on the adapter 210, or on the analog positioner 50, and is particularly suitable good for a machine-controlled or computer-controlled use, since both the closing and the release of the connection with a single, linear movement takes place.
  • the receiving means of the analog 14 has an internal thread and the intermediate piece 210 is screwed.
  • the pull-off force of the connection between the analog 14 and the analogue receiving area 216 of the intermediate piece 210 may be determined by the geometry of the slots 232 and by the Material of the analogue recording area 216. The peel force can therefore be adjusted, for example, by the length of the slots 232.
  • the pull-off force for releasing the connection between analog recording area 216 and analog 14 is between 3 and 5 N.
  • the holder 10 is connected to the computer controlled positioning unit (not shown). Subsequently, by placing the ball head 28 on a zero level, the computerized positioning unit is calibrated to "orientate" in space 10. The holder 10 is then releasably connected to the adapter 210 and analog 14, and the latter at the intended location Once the analog 14 has been firmly anchored in the model, such as by gluing, the connection between analog 14 and adapter 210 is first released so that the entire analog positioner 50 can be removed from the analog 14.
  • the holder 10 and the intermediate piece 210 can be separated from each other and cleaned, so that they can be used later for a further positioning operation. Alternatively, it is of course also possible that the holder 10 and / or the intermediate piece 210 are disposed of after a single use.
  • the peel force for releasing the connection between the holder receiving portion 212 and the holder 10 (and the peeling force for releasing the connection between the analog receiving portion 216 and the analog 14 are independent from each other in the illustrated embodiment.
  • the peel force for releasing the connection between the analog 14 and the analog receiving portion 216 of the intermediate piece 210 is preferably selected to be less than the peel force of the connection between the holder 14 and the holder receiving portion 212. This ensures that after the insertion of the analog 14 When the analog positioner 50 is withdrawn, the connection between the analog 14 and the analog receiving portion 216 of the intermediate piece 210 is released into the borehole in the model while the connection between the holder receiving portion 212 and the holder 10 remains. This has the advantage that analog positioner 50 remains intact and thus ready to receive another analog.
  • the analog positioner 50 forms a set according to the invention.
  • Figure 7 shows a longitudinal section through a second embodiment of an inventive intermediate piece 310 according to the second preferred embodiment.
  • the holder receiving portion 312 is formed substantially the same as in the first embodiment shown in Figures 3 and 4.
  • the analog recording area 316 has a snap connection and is intended to receive an insertion area of an analog.
  • the analogue recording Area 316 is substantially hollow cylindrical in shape and has a frustoconical recess 334 at a front end 313. At the front end 313 is also formed in the circumferential direction, a snap-action lip 336 in the form of an inwardly projecting, annular projection.
  • the intermediate piece 310 shown in Figure 7 is used to form an external connection with an analog.
  • the snap lip 336 includes a coronal end portion of the analog portion corresponding to the implant shoulder.
  • the peel force for releasing the connection between the analog and the analog receiving portion 316 is preferably smaller than the peeling force for releasing the connection between the holder 10 and the holder receiving portion 312.

Landscapes

  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Prosthetics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

La présente invention concerne un dispositif de positionnement d'analogue (50) pour mettre en place un analogue au cours d'une planification pré-opératoire. Le dispositif de positionnement d'analogue (50) comprend un élément de support (10) et au moins une pièce intermédiaire (210) destinée à l'immobilisation temporaire de l'analogue (14) sur le support (10). Le support (10) comprend une tige (16) qui présente une section à recevoir (18) destinée à être reçue dans un moyen de réception d'une unité de positionnement commandée par ordinateur, et une section de positionnement (20) qui se raccorde axialement à celle-ci et présente une unité de fixation (22). La section à recevoir (18) se trouve à une première extrémité de l'élément de support et l'unité de fixation (22) se trouve à une seconde extrémité de l'élément de support, opposée axialement à la section à recevoir (18). La section de positionnement (20) présente un élément de référence (28). La pièce intermédiaire (210) présente un axe longitudinal (218), une première extrémité (211) présentant une zone de réception d'élément de support (212) destinée à la liaison amovible entre la pièce intermédiaire (210) et l'unité de fixation (22) de l'élément de support (10), et une seconde extrémité opposée axialement à la première extrémité et comportant une zone de réception d'analogue (216) destinée à recevoir temporairement l'analogue (14).
EP11724971.4A 2010-06-10 2011-06-10 Dispositif de positionnement d'analogue Withdrawn EP2579801A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11724971.4A EP2579801A2 (fr) 2010-06-10 2011-06-10 Dispositif de positionnement d'analogue

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10005988 2010-06-10
PCT/EP2011/002845 WO2011154149A2 (fr) 2010-06-10 2011-06-10 Dispositif de positionnement d'analogue
EP11724971.4A EP2579801A2 (fr) 2010-06-10 2011-06-10 Dispositif de positionnement d'analogue

Publications (1)

Publication Number Publication Date
EP2579801A2 true EP2579801A2 (fr) 2013-04-17

Family

ID=42989276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11724971.4A Withdrawn EP2579801A2 (fr) 2010-06-10 2011-06-10 Dispositif de positionnement d'analogue

Country Status (3)

Country Link
US (1) US20130108987A1 (fr)
EP (1) EP2579801A2 (fr)
WO (1) WO2011154149A2 (fr)

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FR3062053B1 (fr) * 2017-01-26 2021-07-16 Anthogyr Sa Piece intermediaire de fixation

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Also Published As

Publication number Publication date
WO2011154149A3 (fr) 2012-03-08
US20130108987A1 (en) 2013-05-02
WO2011154149A2 (fr) 2011-12-15

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