CN212592509U - Passive position clamp for multi-implant repair - Google Patents

Abstract

The utility model provides a prosthetic passive position anchor clamps of many plants body: a plurality of implants are fixed on the gum bone, a columnar repair base station is arranged on each implant, and the inner wall and the outer wall of the upper section of the repair base station are irregular surfaces; the passive position fixture is cut by the CAD-CAM integral printing resin material port in a segmented manner, and then is reconnected in the port by self-setting resin, each printing material cutting block is provided with a slot, the inner wall contour of the slot is matched with the outer contour of the upper section of the corresponding repairing base station, and an embedded block embedded into a central through hole of the repairing base station is arranged in the slot; the upper section of the repair abutment is respectively inserted into each slot of the passive position fixture and is transversely kept relatively fixed. Based on the utility model provides a passive position anchor clamps that the scheme was made, prior art compares, and is higher with the restoration base station degree of adaptability, and it is also more convenient to install in patient's mouth simultaneously, relatively friendly to the patient.

Description

Passive position clamp for multi-implant repair

Technical Field

The utility model relates to a plant restoration technical field, concretely relates to prosthetic passive position anchor clamps of many plants body.

Background

With the increasing requirements of people on oral health, the continuous loss of multiple tooth positions and the implantation and restoration of the edentulous jaw are more and more cases. In the repair of a plurality of implants, how to accurately copy the three-dimensional position of the implant through the impression is the key for obtaining the passive positioning and is an important factor for ensuring the repair effect^[1]。

At present, the clinical recognition is that the accurate position of the implant is obtained by a method of passively positioning the implant transfer rod so as to prepare the passive position of the implant. Research finds that windowing impression is more accurate than closing window^[2]When the window-opening mold-taking is carried out in a multi-unit planting mode, the mold rod is fixedly connected in a mode of cutting off and reconnecting dental floss resin or resin rod, and a more accurate mold can be obtained^[3]. However, the conventional method of using an open transfer rod and obtaining a passive position through resin connection has the problems of high requirement on the patient's mouth opening degree, large odor and long time consumption when the floss is wound and the self-setting resin is connected in the mouth, and poor patient feeling. The suitability of the metal passive clamp and the planting base station for SLM (Selective laser melting) printing improved by the prior art room is still required to be improved, and the accuracy of the metal passive clamp and the planting base station cannot meet the requirement in the clinical use process.

In conclusion, the preparation of the implant passive position model is a key step of multi-unit implant restoration. The prior various technologies have defects of different degrees. It is well recognized in the implant repair impression method that fenestrated impressions are more accurate than closed-window impressions. Compared with the traditional method in the method for windowing the impression, the method for windowing the impression uses an opening transfer rod, winds the transfer rod by 8-shaped dental floss and then coats self-setting resin on the dental floss to connect and obtain a passive position, and the method has the main problems of higher requirement on the opening degree of a patient, large peculiar smell in clinical operation, longer time consumption and poorer feeling of the patient in diagnosis; or the step of connecting the transfer rod on the model after the initial impression is taken is completed, and then the passive position transfer rod is disconnected and reconnected before the clinical impression taking.

At present, there is a method for obtaining a passive position of an implant by using an improved closed impression mold, after a clinical closed transfer rod is used for preparing an initial impression mold of an implant position, a proper repairing base station is selected in a technical room, then a SLM printing metal inner crown and a connecting rod are adopted as a passive clamp according to the shape of the repaired repairing base station, and the closed passive position impression mold is taken after the SLM metal clamp is installed and connected by self-setting resin during clinical trial wearing of the base station. The improved passive clamp realizes a method for preparing a passive position by using a closed impression, and solves the problem that the impression can not be opened when a multi-unit implant passive position model is prepared under the condition that the opening degree of a patient is insufficient. However, the suitability of the SLM metal clamp and the implanting base station still needs to be improved, and the accuracy of the SLM metal clamp and the implanting base station cannot meet the requirement in the clinical use process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses improve the degree of matching of planting passive position impression taking clamp and planting base station through the resin anchor clamps that digital design CAD CAM printed according to the inside different structures of different systems implant permanent base station to the passive position impression taking of the implant is accomplished to the mode that realizes the die that closes, more is favorable to the convenience of clinical operation and patient's travelling comfort. In order to achieve the object, the present invention provides a passive position fixture for multi-implant restoration, and a method for multi-implant restoration by using the passive position fixture prepared based on digital design, the specific scheme is as follows:

a passive position clamp applied to multi-implant restoration is characterized in that a plurality of implants are fixed on a gum bone, a columnar restoration base station is installed on each implant, the restoration base station is provided with an axial through hole, and the inner wall and the outer wall of the upper section of the restoration base station, which is exposed out of soft tissues, are irregular surfaces;

the passive position fixture is formed by cutting prefabricated blocks printed in a 3D mode in an integral mode in a segmented mode outside a port and then connecting the prefabricated blocks in the port in a reconnecting mode through adhesives, each cutting block is provided with a slot, the inner wall contour of each slot is matched with the contour of the outer wall of the corresponding repairing base station, an embedded block embedded into the through hole is arranged in each slot, and the whole or local outer contour of each embedded block is matched with the contour of the inner wall of the through hole;

the upper section of the repair base station is respectively inserted into each slot of the passive position fixture, the inner wall of each slot is attached to the outer wall of the upper section of the repair base station, and the embedded block is embedded into the through hole and attached to the inner wall of the through hole, so that the passive position fixture arranged on the repair base station is ensured to be transversely kept relatively fixed.

Furthermore, a gap is formed in the side wall of the upper end of the repair base station, and the embedded block is downwards embedded into the gap;

the local width of the embedded block embedded into the gap is equivalent to the width of the gap.

Further, the binder is a self-setting resin.

Further, fixing each repairing base station on a plaster model consistent with the position information of the intraoral implant, and printing out a prefabricated block of a resin material integrally by adopting CAD-CAM based on the 3D optical scanning position information of the repairing base stations on the plaster model.

Further, the repair abutment is detachably mounted on the implant.

Furthermore, the lower end of the repairing base station is inserted on the implant, a screw in threaded connection with the implant is arranged in the through hole, and a step for clamping a screw head is arranged on the inner wall of the through hole.

The utility model has the advantages that:

(1) the utility model discloses in the method of planting passive position is prepared to closed impression, need improve and plant the problem of base station suitability to passive position anchor clamps, adopt digital technology to realize that the adaptation degree is adjustable by passive position anchor clamps and planting base station, intraoral passive position anchor clamps are cutting and bond in the mouth after printing the monoblock simultaneously and form, passive position anchor clamps that this kind of mode was made have the common way of taking one's place of the polycell of preferred, the accuracy is better, adaptation that can be better is in intraoral restoration base station, need not to do over again in patient's mouth many times.

(2) The utility model discloses the resin anchor clamps that print through digital design CAD/CAM according to the inside different structures of different systems implant permanent base station improve the degree of matching of planting passive position mold picking clamp (passive position anchor clamps promptly) and planting base station (repair the base station promptly) to realize the passive position mold picking of the implant is accomplished to the mode of closed die.

(3) The utility model relates to an increase hollow maintenance device at passive anchor clamps somatic part, can strengthen the associativity of passive anchor clamps and silicon rubber impression taking material, reduce impression material and take place the possibility of warping at the drawing of patterns in-process.

(4) The utility model relates to a based on the horizontally delivery of base station can help clinical try-on inject interlock record silicon rubber on the permanent base station of having selected when trying on passive position, improve the accuracy of jaw position relation record. The clinical connection range of a clinician is smaller after the passive clamp is determined to be in place, and the convenience of clinical operation and the comfort of a patient are better facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a schematic view of the contour and upper ends of a plurality of prosthetic abutments with a gap;

fig. 2 is an overall perspective view of a single prosthetic abutment, the bottom of which is provided with an insert block for inserting on an implant;

figure 3 shows a cross-sectional view of a screw in the prosthetic abutment for securing the prosthetic abutment to the implant;

FIGS. 4-5 show perspective and bottom views of the shifting jig;

FIG. 6 shows a schematic view of a printed 3D printed precast block used as a subsequent passive position jig body being mounted on a plaster model repair base;

FIG. 7 is a schematic view of the 3D printed precast block of FIG. 6 cut into multiple pieces;

FIG. 8 is a schematic view showing the placement of a prosthetic abutment onto an intraoral implant and a plurality of cutting blocks ready for placement on each prosthetic abutment;

FIG. 9 is a schematic view of the plurality of printed material cut blocks of FIG. 8 mounted on respective intraoral prosthetic abutments;

FIG. 10 shows a schematic view of multiple printed material cut pieces bonded together within a port using self-setting resin to ultimately form a passive position clamp;

figure 11 is a cross-sectional view of a passive position clamp intraorally mounted on a multi-implant healing abutment.

Description of reference numerals:

10-gum soft tissue; 20-repairing the base station; 21-repairing the gap of the base station; 22-repairing the lower end insert block of the base station; 23-repairing a boss at the lower end of the base station; 30-passive position clamp; 31-a slot; 32-an insert; 33-cutting the block; 34-self-setting resin; 35-3D printed precast block; 36-repairing the mounting screw in the base station through hole; 40-gypsum model.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to thoroughly understand the present invention, detailed steps and detailed structures will be provided in the following description so as to explain the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

The utility model provides a passive position anchor clamps of accurate positioning implant die position when many implants are restoreed is fixed with many implants (not shown in the figure) on the gum bone, all installs column restoration base station 20 on every implant, restores base station 20 and sets up axial through-hole. The inner wall and the outer wall of the upper section of the prosthetic abutment 20 exposed to the soft tissue are irregular surfaces, as shown in fig. 1. With continued reference to fig. 4-5, the passive position fixture 30 is formed by cutting the whole 3D printed prefabricated block 35 in the outer portion of the mouth and then reconnecting the cut prefabricated block with the adhesive in the mouth (as shown in fig. 10), each cutting block is provided with a slot 31, the inner wall profile of the slot 31 matches with the outer wall profile of the corresponding repair abutment 20, an insert block 32 capable of being inserted into the through hole of the repair abutment 20 downwards is arranged in the slot 31, and the outer profile of the insert block 32 matches with the inner wall profile of the through hole. The upper section of the repair abutment 20 is inserted into each slot 31 of the passive position clamp 30, the inner wall of each slot 31 is attached to the outer wall of the upper section of the repair abutment 20, and the insert 32 is inserted into the central through hole of the repair abutment 20 and attached to the inner wall of the through hole, so that the passive position clamp 30 mounted on the repair abutment 20 is ensured to be transversely kept relatively fixed.

In other words, the inner and outer walls of the upper section of the prosthetic abutment 20 are uneven surfaces, for example, when the sidewall of the prosthetic abutment 20 is provided with a longitudinal rib, the inner wall of the passive fixture 30 corresponding to the slot 31 is provided with a vertical slot, and the passive fixture 30 is fixed relatively and cannot rotate horizontally when inserted into the prosthetic abutment 20.

The utility model provides a pair of when many plants body are restoreed accurate positioning implant die position passive position anchor clamps 30 is prepared according to the 3D scanning model of restoreing base station 20 and forms. Install on restoreing the base station 20 passive position anchor clamps 30, the interior outer wall of restoreing the base station 20 respectively with slot 31 inner wall, the laminating of abaculus 32 outer wall mutually, realized the cooperation of closely joint between restoreing base station 20 and the passive position anchor clamps 30 from this, and then effectively avoid the relative restoration base station 20 slip rotation displacement of passive position anchor clamps 30 to follow-up mould precision of carrying out the restoration of many implants according to passive position anchor clamps 30 has been improved.

Wherein, the whole side wall of the insert 32 is attached to the inner wall of the central through hole of the repair base 20, or the partial side wall (at least including the opposite side walls) of the insert 32 is attached to the inner wall of the central through hole of the repair base 20.

Preferably, the upper end side wall of the repairing base station 20 is provided with a notch 21, the notch is connected with the upper end opening of the repairing base station 20, when the passive position clamp 30 is inserted on the repairing base station 20, the embedded block 32 is not only embedded in the central through hole of the repairing base station 20, but also just embedded in the notch 21, and the relative fixation between the repairing base station 20 and the passive position clamp 30 is further limited. The width of the insert 32 inserted into the notch 21 is equal to the width of the notch.

In an alternative embodiment, the prefabricated block 35 of resin material is integrally printed by CAD-CAM based on the 3D optical scanning position information of each of the repair bases, and then the 3D printed prefabricated block 35 is fixed on the plurality of repair bases 20 on the plaster model 40 and cut into a plurality of cutting blocks 33. Preferably, the cutting blocks 33 are bonded together inside the mouth as the passive clamp 30 by using self-setting resin, which is only a preferred adhesive, and other types of adhesives can be selected for specific applications, and are not described herein.

In an alternative embodiment, the prosthetic abutment 20 is removably attachable to the implant. Specifically, as shown in fig. 2, the prosthetic abutment 20 is provided at a lower end thereof with a substantially annular projection 23, and an insert 22 is provided below the projection 23, and the prosthetic abutment 20 is primarily fixed to the implant by inserting the insert 22 into a slot formed in the implant. A screw 36 in threaded connection with the implant is arranged in the through hole, and the screw 36 is screwed downwards into the internal threaded hole of the implant to realize the butt joint and fixation of the repair abutment 20 and the implant. Wherein, the inner wall of the through hole is provided with a step for clamping the screw head.

As shown in FIGS. 6-11, the following further describes the steps of the mold-picking method for multi-implant repair based on the passive position fixture 30:

s1, preparing a multi-implant position initial impression by adopting the transfer rod, preparing a plaster model containing a plurality of implants after copying the model, wherein the three-dimensional position and the shape of the implant substitute of the plaster model are consistent with those of the implant in the mouth.

S2, selecting the repairing base station 20 according to the plaster model of the plurality of implants, and fixing the repairing base station on the implant substitute in the plaster model.

And S3, primarily grinding the repair abutment 20 and finding a multi-unit common in-place path. Wherein, the inner wall and the outer wall of the upper section of the repair abutment 20 exposed out of the soft tissue are both irregular surfaces.

S4, performing 3D optical scanning on the implant rehabilitation platforms 20 to obtain the relationship between the digitized information and the three-dimensional position of each rehabilitation platform 20, that is, the coordinate information of the rehabilitation platform in the spatial coordinate system in the scanning software.

And S5, printing a whole prefabricated block 35 by adopting 3D according to the digital information and the three-dimensional position relation of each repairing base station 20, wherein the prefabricated block 35 is provided with a plurality of slots 31 matched with the multi-unit common positioning channels.

S6, as shown in fig. 6-7, the one-piece 3D printed prefabricated block 35 is mounted on the repair abutments 20 of the prefabricated plaster model 40, and each of the repair abutments is inserted into the corresponding slot, and the three-dimensional position of the repair abutment 20 mounted on the plaster model 40 is consistent with the intraorally fixed repair abutment 20. The 3D optical scanning repair base station 20 is used for preparing the 3D printing prefabricated block 35, and is convenient for people to select a proper cutting position outside the mouth to perform segmented cutting on the 3D printing prefabricated block 35.

Subsequently, the prefabricated block 35 is integrally positioned on the repair base 20 on the plaster model 40, the prefabricated block 35 is cut among a plurality of unit repair bases, and the size of a cutting gap is controlled in the cutting process, so that the passive clamp can be connected secondarily in the mouth with self-setting resin as little as possible in clinic.

S7, as shown in fig. 8 to 9, each of the prosthetic abutments 20 on the plaster model 40 is detached and attached to the intraoral implant, and then the cutting blocks 33 are respectively inserted into the intraoral prosthetic abutments 20, each of the printing material cutting blocks 33 being laterally held relatively fixed on the prosthetic abutment 20. Finally, a plurality of printing material cut pieces 33 are bonded together within the mouth using self-setting resin 34 to form the final passive position clamp 30, as shown in fig. 10. Fig. 11 is a cross-sectional view (the adhesive part is not shown) of the passive position fixture installed on the multi-implant restoration abutment in the mouth, and thus it can be seen that the inner wall of the slot 31 of the passive position fixture 30 is attached to the outer wall of the upper section of the intraoral restoration abutment 20, and the insert 32 is embedded in the central through hole of the restoration abutment 20 and attached to the inner wall of the through hole, which can effectively ensure that the passive position fixture installed on the restoration abutment is laterally kept relatively fixed, so that when the passive position fixture 30 is sleeved on the restoration abutment 20, the passive position fixture 30 is laterally fixed relatively and cannot be displaced.

If the upper end of the repair abutment 20 is provided with the notch 21, the insert 32 is just embedded into the notch 21 while being attached to the inner wall of the through hole, thereby further playing a role in positioning and limiting.

The above description is directed to the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; without departing from the scope of the invention, it is intended that the present invention shall not be limited to the above-described embodiments, but that the present invention shall include all the modifications and variations of the embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.

The reference is made:

[1](Lee H，So JS，Hochstedler JL，et al.The accuracy ofimplant impressions: Asystematic review[J].J Prosthet Dent，2008，100(4):285－291.)

[2](Osman MS，Ziada HM，AbubakrNH，et al.Implant impression accuracy ofparallel and non-parallel implants:a comparative in-vitro analysis of open and closedtraytechniques[J].Int J Implant Dent，2019，5(1):4.)

[3](Filho HG,Mazaro JV,Vedovatto E,et al.Accuracy of Impression Techniques for Implants.Part 2-Comparison of Splinting Techniques[J]. JProsthodont，2009，18(2):172－176.)(Papaspyridakos P，Benic GI，Hogsett VL，et al.Accuracy of implant casts generated with splinted and non-splinted impression techniques for edentulous patients:an optical scanning study[J].Clin Oral Implants Res,2012,23(6):676－681.)(Naconecy MM，Teixeira ER，Shinkai RSA，et al.Evaluation ofaccuracy of3 transfertechniques for implant-supported prostheses with multiple abutments[J].Int J Oral Maxillofac Implants，2004， 19(2):192－198.)。

Claims (6)

1. a passive position clamp for multi-implant restoration is characterized in that a columnar restoration abutment is arranged on each implant, the restoration abutment is provided with an axial through hole, and the inner wall and the outer wall of the upper section of the restoration abutment exposed out of soft tissues are irregular surfaces;

the passive position fixture is formed by cutting prefabricated blocks printed in a 3D mode in an integral mode in a segmented mode outside a port and then connecting the prefabricated blocks in the port in a reconnecting mode through adhesives, each cutting block is provided with a slot, the inner wall contour of each slot is matched with the contour of the outer wall of the corresponding repairing base station, an embedded block embedded into the through hole is arranged in each slot, and the whole or local outer contour of each embedded block is matched with the contour of the inner wall of the through hole;

the upper section of the repair base station is respectively inserted into each slot of the passive position fixture, the inner wall of each slot is attached to the outer wall of the upper section of the repair base station, and the embedded block is embedded into the through hole and attached to the inner wall of the through hole, so that the passive position fixture arranged on the repair base station is ensured to be transversely kept relatively fixed.

2. The passive position fixture for multi-implant restoration according to claim 1, wherein a notch is formed on the upper side wall of the restoration abutment, and the insert is inserted downwards into the notch;

the local width of the embedded block embedded into the gap is equivalent to the width of the gap.

3. The passive site holder of multi-implant restoration of claim 1, wherein said adhesive is a self-setting resin.

4. The passive-position jig for multi-implant restoration of claim 3, wherein each of the restoration abutments is fixed on a plaster model in conformity with intraoral implant position information, and prefabricated blocks of resin material are printed out integrally using CAD-CAM based on 3D optical scanning position information of the restoration abutments on the plaster model.

5. The passive position jig for multi-implant restoration of claim 1, wherein the restoration abutment is detachably mounted on the implant.

6. The passive position clamp for multi-implant restoration according to claim 5, wherein the lower end of the restoration abutment is inserted on the implant, a screw in threaded connection with the implant is provided in the through hole, and the inner wall of the through hole is provided with a step for clamping the head of the screw.

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