CN114191119A - Auxiliary device for adhering tooth veneers and tooth veneering adhering method - Google Patents
Auxiliary device for adhering tooth veneers and tooth veneering adhering method Download PDFInfo
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- CN114191119A CN114191119A CN202111642554.8A CN202111642554A CN114191119A CN 114191119 A CN114191119 A CN 114191119A CN 202111642554 A CN202111642554 A CN 202111642554A CN 114191119 A CN114191119 A CN 114191119A
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/20—Repairing attrition damage, e.g. facets
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Abstract
The invention discloses an auxiliary device for adhering a tooth veneer and a tooth veneer adhering method, and relates to the technical field of tooth whitening and restoration. The auxiliary device for the adhesion of the tooth veneers and the adhesion method of the tooth veneers can simultaneously adhere a plurality of veneers on the tooth surfaces, are convenient and quick to operate, are accurate in positioning of each veneer, and can avoid the veneers from being damaged.
Description
Technical Field
The invention relates to the technical field of tooth whitening and restoration, in particular to an auxiliary device for tooth veneering adhesion and a tooth veneering adhesion method.
Background
The tooth veneering is one of tooth whitening and repairing technology, and the tooth veneering repairing is to paste a layer of material similar to normal tooth color on the discolored or damaged tooth surface so as to achieve the whitening or repairing effect. Because of its advantages of minimal invasion, beauty, good biocompatibility and the like, it has become one of the mainstream techniques of aesthetic and minimally invasive repair of oral cavity. The adhesion of the veneers is a key step for ensuring the fixation of the veneers, closing the edges and influencing the clinical service life of the prosthesis.
When the porcelain wainscot bonds, the doctor can carry out the wainscot first and try on, confirms that it is taken one's place completely and the marginal driving fit back, carries out the preliminary treatment of wainscot: 1. etching the tissue surface with hydrofluoric acid for 20-120 s; 2. ultrasonically cleaning (3-5min), and blow-drying; 3. coating a silane coupling agent on the tissue surface (2-3 times); 4. and (4) coating an adhesive. After the tooth surface of the abutment is polished, acid-etched, washed and dried, the resin cement is coated on the tooth surface of the abutment and/or the tissue surface of the porcelain veneer, the veneer is positioned on the abutment according to the positioning direction, the resin cement is photocured and the redundant resin cement is removed, and finally the adjustment is carried out
And polishing.
When a plurality of veneers are bonded in the traditional veneering bonding process, one mode is that the veneers are bonded one by one, the bonding process of each veneer comprises trying on, porcelain surface treatment, abutment surface treatment and veneering bonding in place, and the operation process is complicated; moreover, because the veneering type prosthesis is shallow in position-retaining shape, the veneering type prosthesis can not be accurately positioned only by wearing the teeth according to the clinical experience and hand feeling of a doctor; the overflow of the resin cement door heater can shield the edge when the veneering is adhered, which is not beneficial for the doctor to judge the in-place condition. When a guide plate is adopted to bond a plurality of veneers at one time in the prior art, the veneers are easy to crack due to stress concentration because the positions of the veneers (namely tracks of the veneers of the teeth worn on the surfaces of the teeth to be restored) are different; and the baffle among the prior art often adopts the rigid connection, like the baffle joint wainscot for stress concentrates more easily, consequently often appears the wainscot phenomenon of splitting.
Disclosure of Invention
The invention aims to provide an auxiliary device for adhering tooth veneers and an adhering method of the tooth veneers, which are used for solving the problems in the prior art, can simultaneously adhere a plurality of veneers on the tooth surfaces, are convenient and quick to operate, are accurate in positioning of each veneer and can avoid the veneers from being damaged.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an auxiliary device for adhering a tooth veneer, which comprises a groove body and curable glue, wherein the groove body is used for covering a dental crown of a dentition, a gap is formed between the inner surface of the groove body and the surface of the dental crown with a veneer, which corresponds to the inner surface of the groove body, and the glue is used for being filled in the gap between the inner surface of the groove body and the surface of the dental crown with the veneer and can be cured to form an elastic colloid layer.
Preferably, the groove bodies comprise clamping groove bodies at two ends and veneering bonding auxiliary groove bodies positioned between the clamping groove bodies at the two ends, the clamping groove bodies at the two ends are used for respectively covering and clamping dental crowns at two ends of the dentition, and the veneering bonding auxiliary groove bodies are used for covering and arranging each dental surface between the dental crowns at the two ends.
Preferably, the facing bonding auxiliary groove body comprises a lip side plate, a tongue side plate and an occlusion end bottom plate, the lip side plate and the tongue side plate are arranged at two ends of the occlusion end bottom plate relatively, the lip side plate is a side plate opposite to the labial surface of the dental crown, the occlusion end bottom plate is a bottom plate opposite to the occlusion end of the dental crown, the tongue side plate is a side plate opposite to the lingual surface of the dental crown, and when the groove body cover is arranged on the dental crown with the facing, the gap between the labial side plate and the upper facing surface of the dental crown labial surface is 0.3-4 mm.
Preferably, the labial side plate covers the labial surface of the dental crown in a range not exceeding the labial surface neck line of the dental crown; the range of the lingual side plate covering the lingual surface of the dental crown does not exceed the lingual neckline of the dental crown.
Preferably, the glue solution is liquid silicone rubber.
Preferably, the elastic colloid layer is a transparent elastic colloid layer, the groove body is a transparent groove body, and the wall thickness of the groove body is 0.3-4 mm.
Preferably, the parts of the labial side plate corresponding to the labial surfaces of the dental crowns are provided with through holes.
Preferably, the clamping groove body comprises a lip side clamping plate, a tongue side clamping plate and an occlusion end clamping plate, the lip side clamping plate and the tongue side clamping plate are arranged at two ends of the occlusion end clamping plate relatively, and a cusp observation hole is formed in the intersection of the lip side clamping plate and the occlusion end clamping plate.
Preferably, the width of the notch of the clamping groove body is smaller than that of the groove bottom.
The present invention also provides a method for veneering teeth based on the above-mentioned auxiliary device for veneering teeth, comprising the steps of:
s1: accurately fitting and maintaining the veneers on the abutment;
s2: covering the groove body on a dental crown of a tooth array formed by the abutment and the adjacent teeth on the two sides of the abutment;
s3: filling a glue solution into a gap between the inner surface of the groove body and the surface of the dental crown, and curing to form the elastic glue layer;
s4: taking down the groove body, adhering the veneering to the elastic colloid layer and taking out along with the groove body;
s5: after the veneering unified pretreatment and the abutment surface treatment in the groove body are finished, coating an adhesive on the abutment tooth surface and/or the veneering tissue surface, then coating resin cement on the abutment tooth surface and/or the veneering tissue surface, and then covering the groove body on the dental crown again, wherein the covering position is kept consistent with the covering position in the step S2;
s6: under the elastic action of the elastic colloid layer, the veneers are tightly attached to the surfaces of the abutment teeth, the veneers are subjected to photocuring treatment after the resin cement overflows, and then the groove bodies are taken down, so that the veneers are accurately attached and bonded to the tooth surfaces.
Compared with the prior art, the invention has the following technical effects:
the invention provides an auxiliary device for adhering a tooth overlay and an adhering method of the tooth overlay, when the tooth overlay is carried out, each overlay mouth is accurately tried on without taking down, a groove body is covered on a tooth crown of a dentition, glue solution is filled in a gap between the inner surface of the groove body and the surface of the tooth crown, the glue solution is solidified to form an elastic colloid layer, the groove body is taken down, at the moment, each overlay is adhered on the elastic colloid layer, the elastic colloid layer is adhered on the inner wall of the groove body, the groove body is held by hand, after the overlaying uniform pretreatment and the surface treatment of the overlay are finished, adhesive is coated on the tooth surface of an abutment and/or an overlay tissue surface, then resin cement is coated on the tooth surface of the abutment and/or the overlay tissue surface, then the groove body is covered on the tooth crown again and is kept consistent with the previous position, each overlay is adhered on the tooth surface under the elastic action of the elastic colloid layer, and (4) after the resin cement is overflowed, carrying out photocuring treatment, taking down the groove body, and accurately attaching and bonding each veneering to the tooth surface. Adopt the liquid cement that the cell body combination can solidify, can all glue on the elastic colloid layer with each wainscot that the accuracy was worn in advance, pinpoint the position of each wainscot, can unify a plurality of wainscots simultaneously and carry out the preliminary treatment, convenient operation is swift, moreover, after coating adhesive and resin cement spit of fland, again cover the cell body on the dental crown, keep unanimous with previous position, thereby the degree of accuracy of each wainscot bonding position has been guaranteed, each wainscot of elastic colloid layer elastic extrusion, can not produce stress concentration effect to each wainscot, thereby avoid the wainscot impaired.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 creative efforts.
FIG. 1 is a schematic perspective view of an auxiliary device for veneering a tooth according to the present invention;
FIG. 2 is a perspective view of the auxiliary device for dental veneering bonding according to the present invention in a use state;
in the figure: 100-auxiliary device for sticking tooth veneers, 1-groove body, 2-clamping groove body, 3-veneering sticking auxiliary groove body, 4-labial side plate, 5-lingual side plate, 6-occlusal end bottom plate, 7-dental crown labial surface, 8-dental crown lingual surface, 9-through hole, 10-labial side clamping plate, 11-lingual side clamping plate, 12-occlusal end clamping plate and 13-cusp observation hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an auxiliary device for adhering tooth veneers and an adhering method of the tooth veneers, which are used for solving the problems in the prior art, can simultaneously adhere a plurality of veneers on the tooth surfaces, are convenient and quick to operate, are accurate in positioning of each veneer and can avoid the veneers from being damaged.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 2, the present embodiment provides an auxiliary device 100 for adhering a tooth facing, including a slot 1 and a curable glue, where the slot 1 is used to cover a tooth crown of a dentition, a gap exists between an inner surface of the slot 1 and a surface of the tooth crown with a facing corresponding to the inner surface of the slot 1, and the glue is used to fill the gap between the inner surface of the slot 1 and the surface of the tooth crown with a facing and can be cured to form an elastic glue layer.
When the teeth are pasted, each pasting face mouth is accurately tried on an abutment needing to be pasted, the slot body 1 is covered on the dental crown of the tooth array formed by the abutment and adjacent teeth at two sides of the abutment without taking down after trying, the slot body 1 is a curved slot with the same direction as the arrangement direction of the teeth and can be covered on the tooth array formed by arranging a plurality of teeth on an upper jaw or a lower jaw, glue solution is filled in a gap between the inner surface of the slot body 1 and the surface of the dental crown, an elastic colloid layer is formed after the glue solution is solidified, the slot body 1 is taken down, at the moment, each pasting face is adhered on the elastic colloid layer, the elastic colloid layer is adhered on the inner wall of the slot body 1, the slot body 1 is held by hand, after the unified preprocessing of the pasting face and the surface processing of the abutment are finished, adhesive is coated on the abutment face and/or a pasting face tissue face, then resin cement is coated on the abutment face and/or the pasting face tissue face, and then the slot body 1 is covered on the dental crown again, keeping consistent with the previous position, clinging each veneering to the tooth surface under the elastic action of the elastic colloid layer, carrying out photocuring treatment after the resin cement overflows, taking down the tank body 1, and accurately clinging and bonding each veneering to the tooth surface. When the veneers are bonded on the elastic colloid layer, the bonding force of the elastic colloid layer can ensure that the veneers cannot fall off when the veneers are pretreated, and the veneers cannot fall off when the veneers are covered on tooth crowns, and meanwhile, after the veneers are bonded on the tooth surfaces by adopting the adhesive and the resin cement paste, the veneers can smoothly fall off from the elastic colloid layer under the bonding force action of the adhesive and the resin cement paste when the groove body 1 is taken down; this device adopts the glue solution that 1 combination of cell body can solidify, can all glue on the elastic colloid layer with each wainscot that the accuracy was worn in advance, pinpoint the position of each wainscot, can unify a plurality of wainscots simultaneously and carry out the preliminary treatment, convenient operation is swift, and, after coating adhesive and resin cement spit of fland, cover cell body 1 again on the dental crown, keep unanimous with previous position, thereby the degree of accuracy of each wainscot bonding position has been guaranteed, each wainscot of elastic colloid layer elastic extrusion, can not produce stress concentration effect to each wainscot, thereby avoid the wainscot impaired.
In this embodiment, the groove body 1 includes the clamping groove bodies 2 at both ends and the veneering bonding auxiliary groove body 3 located between the clamping groove bodies 2 at both ends, the clamping groove bodies 2 at both ends are used for covering and clamping on the dental crowns at both ends of the dentition respectively, and the veneering bonding auxiliary groove body 3 is used for covering and arranging on each dental surface between the dental crowns at both ends. The clamping structure is adopted to install the groove body 1, and the disassembly and the assembly are convenient and rapid.
In this embodiment, the veneering bonding auxiliary groove body 3 includes a lip side plate 4, a tongue side plate 5 and a occlusal end bottom plate 6, the lip side plate 4 and the tongue side plate 5 are oppositely arranged at two ends of the occlusal end bottom plate 6, the lip side plate 4 is a side plate opposite to a crown labial surface 7, the tongue side plate 5 is a side plate opposite to a crown lingual surface 8, the occlusal end bottom plate 6 is a bottom plate opposite to a crown occlusal end, when the groove body 1 is covered on a crown with a veneering, a gap between the lip side plate 4 and the upper veneering surface of the crown labial surface is 0.3-4 mm, preferably 1.5mm, so that the thickness of the elastic colloid layer is moderate, the elastic range is not caused by too small thickness, thereby avoiding stress concentration caused by too small elastic range, and the situation that the veneering and the tooth surface are not tightly bonded because the extrusion force to the veneering is not enough caused by too small elastic range is not occurred. The occlusion end of the front tooth crown refers to the incisal edge which is the incisal edge and can occlude things and is opposite to the upper and lower teeth of the front tooth, and the occlusion end of the back tooth crown refers to the end which is opposite to the upper and lower teeth of the back tooth and is used for chewing food.
In the embodiment, the range of the labial side plate 4 covering the crown labial surface 7 does not exceed the crown labial surface neck line, preferably 2/3 of the height of the crown labial surface, so that the resin cement can overflow from the uncovered edge of the veneer; the range of the lingual side plate 5 covering the lingual surface 8 of the dental crown does not exceed the lingual cervical line of the dental crown, preferably 2/3 of the lingual surface of the dental crown, so that after the filling glue is cured, the slot body 1 is more stable after being covered on the dental crown.
In the embodiment, the glue solution is liquid silicone rubber, is tasteless and nontoxic, has stable performance, can perform a certain bonding effect on the facing, is not limited to the liquid silicone rubber, and other curable liquids with bonding performance similar to the liquid silicone rubber are also within the protection scope of the invention.
In this embodiment, the elastic colloid layer is transparent elastic colloid layer, and cell body 1 is transparent cell body, obtains transparent elastic colloid layer after liquid silicone rubber solidifies, is convenient for observe the operation, and the wall thickness of cell body 1 is 0.3 ~ 4mm, and preferably 1.5mm guarantees the intensity of cell body, the cracked condition of cell body when avoiding operating.
In this embodiment, the parts of the labial side plate 4 corresponding to the labial surfaces 7 of the dental crowns are provided with through holes 9, when the glue solution is filled in the gap between the inner surface of the groove body 1 and the surface of the dental crowns, the glue solution enters into each through hole 9, and after curing, the connection between the elastic colloid layer and the groove body 1 is more stable.
In this embodiment, the clamping groove body 2 includes the lip side cardboard 10, the tongue side cardboard 11 and the interlock end cardboard 12, and the lip side cardboard 10 sets up in interlock end cardboard 12 both ends with the tongue side cardboard 11 relatively, and the crossing department of lip side cardboard 10 and interlock end cardboard 12 is equipped with the cusp and observes hole 13. When the clamping groove body 2 is clamped on the adjacent teeth at two ends of the abutment tooth needing to be veneered, the relative positions of the adjacent teeth and the clamping groove body 2 are conveniently observed through the tooth cusp observation hole 13, so that the labial clamping plate 10 and the occlusal end clamping plate 12 are attached to the tooth surfaces of the adjacent teeth, the consistency of the front and back installation positions of the groove body 1 is ensured, and the veneering is ensured to be accurately attached.
In this embodiment, the notch width of the clamping groove body 2 is less than the groove bottom width, the characteristic that the top of the tooth crown is wide and the bottom of the tooth crown is narrow can be utilized, the notch width is less than the groove bottom width by setting the clamping groove body 2 into a groove structure corresponding to the tooth crown, so that the clamping groove body 2 is conveniently covered with the clamping groove body to be clamped on the tooth crown, and the clamping groove body 2 is convenient to take out. However, the widths of the notch and the groove bottom of the clamping groove body 2 are not limited to the above situation, and the width of the notch can be set to be larger than or equal to the width of the groove bottom according to actual needs.
A method for veneering teeth bonding based on the auxiliary device 100 for veneering teeth bonding in the first embodiment, comprising the following steps:
s1: accurately fitting and maintaining the veneers on the abutment;
s2: covering the trough body 1 on the dental crown of the tooth array formed by the abutment and the adjacent teeth on the two sides of the abutment;
s3: filling the glue solution into the gap between the inner surface of the groove body 1 and the surface of the dental crown, and curing to form an elastic glue layer;
s4: taking down the tank body 1, adhering the veneers to the elastic colloid layer and taking out the elastic colloid layer along with the tank body 1;
s5: after the veneering unified pretreatment and the abutment surface treatment in the trough body 1 are finished, coating the adhesive on the abutment tooth surface and/or the veneering tissue surface, then coating the resin cement on the abutment tooth surface and/or the veneering tissue surface, and then covering the trough body 1 on the dental crown again to keep the same position as the covering position in the step S2;
s6: under the elastic action of the elastic colloid layer, the veneers are tightly attached to the surfaces of the abutment teeth, the veneers are subjected to photocuring treatment after the resin cement overflows, then the groove body 1 is taken down, and the veneers are accurately attached and bonded to the tooth surfaces.
The adhesion force between the veneering and the surface of the abutment after the photocuring treatment is larger than the adhesion force between the veneering and the elastic colloid layer, so that the veneering can be adhered to the surface of the abutment when the groove body 1 is taken down.
The method adopts the groove body to combine the glue solution which can be solidified, can adhere each veneering accurately worn in advance on the elastic glue body layer, accurately positions the positions of each veneering, can uniformly pretreat a plurality of veneering simultaneously, is convenient and quick to operate, covers the groove body on the dental crown again after coating the adhesive and the resin cement, keeps consistent with the previous positions, ensures the accuracy of the bonding positions of each veneering, and ensures that the elastic glue body layer elastically extrudes each veneering without generating stress concentration effect on each veneering, thereby avoiding the damage of the veneering.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. An auxiliary device for veneering bonding of teeth, characterized in that: the dental film comprises a groove body and curable glue, wherein the groove body is used for covering a dental crown of a dentition, a gap is formed between the inner surface of the groove body and the surface of the dental crown with a facing corresponding to the inner surface of the groove body, and the glue is filled in the gap between the inner surface of the groove body and the surface of the dental crown with the facing and can be cured to form an elastic colloid layer.
2. An aid for dental veneering according to claim 1, wherein: the groove bodies comprise clamping groove bodies at two ends and veneering bonding auxiliary groove bodies located between the clamping groove bodies at the two ends, the clamping groove bodies at the two ends are used for covering and clamping dental crowns at two ends of a dentition respectively, and the veneering bonding auxiliary groove bodies are used for covering and arranging tooth surfaces between the dental crowns at the two ends.
3. An aid for dental veneering according to claim 2, wherein: the veneering bonding auxiliary groove body comprises a lip side plate, a tongue side plate and an occlusion end bottom plate, the lip side plate and the tongue side plate are arranged at two ends of the occlusion end bottom plate relatively, the lip side plate is a side plate opposite to the labial surface of the dental crown, the tongue side plate is a side plate opposite to the lingual surface of the dental crown, the occlusion end bottom plate is a bottom plate opposite to the occlusion end of the dental crown, and when the groove body cover is arranged on the dental crown with the veneering, the gap between the labial side plate and the upper veneering of the labial surface of the dental crown is 0.3-4 mm.
4. An aid for dental veneering according to claim 3, wherein: the range of the labial side plate covering the labial surface of the dental crown does not exceed the labial surface neck line of the dental crown; the range of the lingual side plate covering the lingual surface of the dental crown does not exceed the lingual neckline of the dental crown.
5. An aid for dental veneering according to claim 1, wherein: the glue solution is liquid silicon rubber.
6. An aid for dental veneering according to claim 1, wherein: the elastic colloid layer is a transparent elastic colloid layer, the groove body is a transparent groove body, and the wall thickness of the groove body is 0.3-4 mm.
7. An aid for dental veneering according to claim 3, wherein: the parts of the labial side plates corresponding to the labial surfaces of the dental crowns are provided with through holes.
8. An aid for dental veneering according to claim 2, wherein: the clamping groove body comprises a lip side clamping plate, a tongue side clamping plate and an occlusion end clamping plate, the lip side clamping plate and the tongue side clamping plate are oppositely arranged at two ends of the occlusion end clamping plate, and a cusp observation hole is formed in the intersection of the lip side clamping plate and the occlusion end clamping plate.
9. An aid for dental veneering according to claim 2, wherein: the width of the notch of the clamping groove body is smaller than that of the groove bottom.
10. A method of veneering dental adhesion based on the aid device for veneering dental adhesion according to any one of claims 1 to 9, comprising the steps of:
s1: accurately fitting and maintaining the veneers on the abutment;
s2: covering the groove body on a dental crown of a tooth array formed by the abutment and the adjacent teeth on the two sides of the abutment;
s3: filling a glue solution into a gap between the inner surface of the groove body and the surface of the dental crown, and curing to form the elastic glue layer;
s4: taking down the groove body, adhering the veneering to the elastic colloid layer and taking out along with the groove body;
s5: after the veneering unified pretreatment and the abutment surface treatment in the groove body are finished, coating an adhesive on the abutment tooth surface and/or the veneering tissue surface, then coating resin cement on the abutment tooth surface and/or the veneering tissue surface, and then covering the groove body on the dental crown again, wherein the covering position is kept consistent with the covering position in the step S2;
s6: under the elastic action of the elastic colloid layer, the veneers are tightly attached to the surfaces of the abutment teeth, the veneers are subjected to photocuring treatment after the resin cement overflows, and then the groove bodies are taken down, so that the veneers are accurately attached and bonded to the tooth surfaces.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021219846436 | 2021-08-23 | ||
| CN202121984643 | 2021-08-23 |
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| CN114191119A true CN114191119A (en) | 2022-03-18 |
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| CN202111642554.8A Pending CN114191119A (en) | 2021-08-23 | 2021-12-29 | Auxiliary device for adhering tooth veneers and tooth veneering adhering method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077542A1 (en) * | 2022-10-11 | 2024-04-18 | 珠海云旎医疗科技有限公司 | Veneer bonding guide, assistant positioning piece, and pressing tool for veneer bonding |
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2021
- 2021-12-29 CN CN202123380845.2U patent/CN216675950U/en active Active
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077542A1 (en) * | 2022-10-11 | 2024-04-18 | 珠海云旎医疗科技有限公司 | Veneer bonding guide, assistant positioning piece, and pressing tool for veneer bonding |
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