Dental Device and Method of Use
20240033055 ยท 2024-02-01
Inventors
Cpc classification
A61C9/008
HUMAN NECESSITIES
International classification
Abstract
A dental device having one or more scan bodies and a frame member is described. Each scan body has a longitudinal axis and a wing region that extends radially outwardly from the longitudinal axis. The scan bodies are attached to dental fasteners in a dental arch and the frame member is attached to the wing regions of the scan bodies to form a physical verification jig. The scan bodies are scanned using an intraoral scanner either before or after attaching the frame member. The scan bodies have a three-dimensional digital image file. CAD software aligns the scanned images to the image files and stiches multiple captures of the dental arch together. A dental device having at least two scan bodies and no frame member is also described. The scan bodies are attached to dental fasteners in a dental arch and the wing regions are positioned so as to converge.
Claims
1. A dental device comprising: one or more scan bodies each having a longitudinal axis and a wing region that extends radially outwardly from the longitudinal axis, wherein an end of the one or more scan bodies is configured to mate with a fastener; a frame member having a top surface and a bottom surface, wherein the bottom surface comprises one or more attachment areas configured to contact an attachment area disposed on the wing region of the one or more scan bodies; and wherein each of the one or more scan bodies has an associated three-dimensional digital image file available in dental CAD software.
2. The dental device of claim 1, wherein the frame member is sized and dimensioned to fit with a dental arch.
3. The dental device of claim 1, wherein each of the one or more attachment areas of the frame member has one or more protrusions, depressions, holes, undercuts, grooves, or lattice structure.
4. The dental device of claim 1, the attachment area disposed on the wing region of the one or more scan bodies comprises one or more protrusions, depressions, holes, undercuts, grooves, or lattice structure.
5. The dental device of claim 1, wherein scan bodies or the frame member have one or more three-dimensional features with a known dimension that can be used to calibrate a physical dimension with digital dimensional data from an intraoral scanner.
6. The dental device of claim 1, wherein the one or more scan bodies includes a first scan body, a second scan body, a third scan body, a fourth scan body, a fifth scan body, a sixth scan body, a seventh scan body and an eighth scan body.
7. The dental device of claim 1, wherein the frame member and wing members are made of a radiopaque material.
8. A method of using the dental device of claim 1, comprising: coupling the one or more scan bodies to the one or more dental fasteners; positioning the wing region of the one or more scan bodies by rotating the scan body about the dental fastener; scanning the scan bodies with an intraoral scanner; using dental CAD software to align the scanned three-dimensional image to the three-dimensional digital image file; and bonding or luting the frame member to the one or more scan bodies by applying an adhesive or hardening material to the attachment areas of the wing regions and the bottom of the frame member and placing the frame member on the one or more wing regions so the frame member is in direct contact with all of the wing regions.
9. The method of claim 8, further comprising the step of CBCT scanning the dental device and the dental arch and aligning the intraoral scan with the CBCT scan.
10. The method of claim 8, further comprising the step of removing the frame member and one or more scan bodies from the fasteners as a single unit and using the single unit as a physical verification jig of the relative fastener positions.
11. The method of claim 8, further comprising the steps of: selecting the one or more scan bodies from a plurality of scan bodies having different sizes; and selecting the frame member from a plurality of frame members having different sizes so that the selected frame member fits with a dental arch and rests on each of the one or more wing members.
12. A dental device for scanning a dental arch comprising: a plurality of scan bodies each having a body region with a longitudinal axis and a wing region that extends radially outwardly from the longitudinal axis; wherein each body region has a bottom end that is configured to mate with a fastener in the dental arch; wherein each of the plurality of scan bodies has an associated three-dimensional digital image file available in dental CAD software; wherein each of the plurality of scan bodies has a shape that facilitates scanning and alignment of scanned data to the associated three-dimensional digital image file; wherein the wing regions of each of the plurality of scan bodies are sized and dimensioned to converge at a location within a central region of a dental arch and come in close proximity to facilitate luting the scan bodies together.
13. The dental device of claim 12, wherein the wing regions taper longitudinally at the distal end from the screw hole of the scan body.
14. The dental device of claim 12, further comprising a plurality of scan bodies and a frame member each having undercuts on one or more attachment areas configured to couple with each other.
15. A method of using the dental device of claim 12, comprising: coupling the plurality of scan bodies to the fasteners in the dental arch; positioning the wing regions of the plurality scan bodies so as to converge within the central region of the dental arch; scanning the scan bodies with an intraoral scanner; using dental CAD software to align the scanned three-dimensional image to the three-dimensional digital image file; and bonding or luting the plurality of scan bodies together.
16. A method of using a dental device comprising a frame member and one or more scan bodies during implant surgery, the method comprising: cutting soft tissue of a dental arch to create one or more surgical flaps; placing one or more implants in a bone of the dental arch; coupling the one or more scan bodies to the one or more implants; scanning the dental arch and the frame member before or after the frame member is affixed to the one or more scan bodies and while the one or more surgical flaps is retracted; and bonding or luting the frame member to the one or more scan bodies in a position that holds the one or more surgical flaps in a retracted position.
17. The method of claim 16, wherein the step of scanning comprises obtaining a preoperative scan, an intraoral scan while the dental device is coupled with the dental arch, and aligning the intraoral scan with the CBCT scan.
18. The method of claim 16, further comprising the steps of: removing the frame member and one or more wing members from the one or more implants as a single unit; and suturing the one or more surgical flaps.
19. The method of claim 18, further comprising the step of using the single unit as a physical verification jig to verify, and optionally, correct the accuracy of the scanned three-dimensional data.
20. The method of claim 16, wherein the step of bonding or luting the frame member to the one or more wing members comprises leveling the top of the frame member to be at approximately the same height as the top of the scan bodies.
21. The dental device of claim 12, wherein the plurality of scan bodies are sand blasted or coated to facilitate scanning.
22. The dental device of claim 12, wherein each wing region has one or more wells to facilitate luting.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION OF THE INVENTION
[0083] The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus, if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
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[0085] Frame member 11 is coupled with two scan bodies 12 and two scan bodies 13. These scan bodies are manufactured with either milling or 3D printing similarly to the frames above. Manufacturing tolerances for scan bodies are typically highly precise, and currently, milling accuracy is slightly better than the highest quality 3D printing methodologies. Metals like titanium, aluminum or stainless steel can all be used for milling these scan bodies. It is also possible to mill the scan bodies out of plastic materials like PEEK or PMMA. 3D printing, on the other hand, allows for more intricate geometries and undercuts that milling is not able replicate. These intricate geometries and undercuts facilitate luting frame member 11 to scan bodies 12, 13. The most accurate 3D printers available today are the polyjet printers made by Stratasys. These printers are accurate because they can print at a resolution as small as 14 microns. Stratasys also makes the materials for their polyjet printers. Their standard material, Vero, is already excellent for this application due to its high strength and accurate dimensional properties. However, they also make even higher strength dentistry specific materials, like VeroDentPlus Med690. As these materials continue to improve and the 3D printing technology continues to become more accurate, 3D printing may become the manufacturing method of choice for these scan bodies.
[0086] Scan bodies 12 are attached to abutments 14 via screws 2. Abutments 14 are attached to implants 15 in dental arch 18. Scan bodies 13 have an abutment portion and a screw 2 that attaches directly to implants 15.
[0087] There are hundreds of dental implant companies on the market around the world. Each make their own screws, abutments and implants. The most well-known dental implant companies include Nobel Biocare, Straumann, Dentsply Implants and Biohorizons. While the dental implants of each of these companies have their own nuances, they all essentially work the same way and have similarly made parts that function the same way. This is even more true with full arch dental implant fixed rehabilitation. The abutment that is generally used for this procedure is the multiunit abutment. Different companies have different names for them, but due to the fact that Nobel Biocare pioneered this procedure, their multiunit abutment was copied by the other dental implant companies. That means that the multiunit abutment across all these different companies is largely very similar, and the parts made to mate with these multiunit abutments are often interchangeable.
[0088] Dental device 100 is designed to be scanned by an intraoral scanner after it is luted together on dental arch 18. Luting in dentistry is the process by which a flowable material is injected between two dental components and hardens to attach those two components together. Examples of these components can be any two of a prepped tooth, a dental implant abutment, a crown, a bridge, a prosthesis, temp cylinder, a Ti base or any other similar dental component not mentioned here. The flowable material typically comes in two parts. Those two parts can be any combination of a liquid, a powder, a gel or a paste. When those two parts are mixed, the mixture starts to harden. If the hardened material is chemically similar to the dental components, it may also chemically bond to those components as it hardens. The hardening of the material can be accelerated by blue visible light or UV light if the material is manufactured with a chemical photoactivator that is calibrated to react to a certain wavelength of light. Examples of materials used for luting include PMMA, bisacryl, or composite resin. Specific product examples include Unifast by GC, Chairside by Zest Anchors, Temp by GC, or LuxaTemp by DMG. Once the device is luted together, it can be removed from dental arch 18 as one piece to be used as a physical verification jig.
[0089] Dental arch 18 can comprise a maxillary jaw arch or mandibular jaw arch of any person of any age and/or size. Dental arch 18 could also comprise an artificial physical model of a person's maxillary or mandibular arch. The model can be made of various gypsum materials or resin materials.
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[0094] Dental device 200 is designed to be scanned by an intraoral scanner before frame 201 is luted or bonded with scan bodies 203 and scan bodies 205. After scan bodies 203 and 205 are scanned, frame 201 is used to lute the scan bodies 203 and 205 together so the device can be removed as one single piece to act as a physical verification jig. However, it is also contemplated that dental device 200 can be scanned after frame 201 is attached with scan bodies 203 and 205. Frame 201 has a top side, a bottom side and a middle lattice section that has honeycombed shaped through-holes from the top side to the bottom side. Frame 201 is shaped like a trapezoid and has a thickness of approximately 5-10 mm. It is contemplated that frame 201 can be shaped like a triangle, a square, a parallelogram or any other geometric shape that would fit into the patient's jaw and facilitate the luting of the scan bodies together. It is also contemplated that there would be a longitudinal slice of negative space through the middle of the frame that is sandwiched between two honeycomb lattices in the middle lattice section of the frame. This slice of negative space in the middle of the thickness of frame 201 would function as an undercut that luting material would be able to harden around to add rigidity and stability to the physical verification jig that dental device 200 would become. It is also contemplated that any lattice or geometry that could act as a scaffold with a plethora of undercuts to hold luting material would make a suitable frame 201 for dental device 200. It is also contemplated that the size and shape of the frame could easily be adjusted to fit the patient's jaw and position of the wing regions of the scan bodies. The clinician could use any standard dental instrument such as scissors, pliers, electronic handpieces with roughened rotational burs and even their own hands to break off parts of the frame that may be preventing them to lute the frame to the scan bodies effectively.
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[0098] Scan bodies 203 and 205 also have wells 213. These wells 213 give the luting material negative space to lay a strong solid foundation that will not be messy and drip into the patient's mouth. The inside of the well has undercuts that the luting material can flow under to facilitate the attachment of the wing region to a frame. As the luting material fills the inside of well 213 and hardens, the undercuts will prevent the hardened luting material from disengaging from the scan body. The undercuts can either be created at the time of manufacturing or added later by tapping well 213 with a screw tap or cutting the inside of well 213 with a bur. In addition to well 213, any three-dimensional support structure that can be used to hold luting material can also be contemplated. This may include an internal lattice, an external protrusion, cross bars, pegs or even a flat surface that can bond to luting material. It is also contemplated that a vertical structure can protrude from the top of the wing to provide a barrier to prevent luting material from entering the screw hole of the conical body region.
[0099] Another function of the contemplated vertical structure could be to facilitate luting the frame to the scan bodies by leveling the surface of wings that are fastened to off-angle dental implants or dental implants placed at different heights. The vertical structure can be adjusted to the same level as an adjacent wing that is at a higher position. When the structures of the wing regions 203b are level, it is much easier to position the frame 201 across all of the wing regions to ensure a rigid and durable structure that will make up the physical verification jig. And yet another function of the vertical structure is that it has additional lattice or three-dimensional geometries that create more scaffolding for the luting material to attach to. Often when implants are placed at different heights and different angles, it is difficult to maintain an even horizontal plane across all wing regions 203b and 205b. A vertical structure that can also attach to the frame regardless of the height of adjacent wing regions allows for more versatility when luting multiple scan bodies 203 and 205 to frame 201. Additionally, it is contemplated that frame 201 could be adjusted with any common dental instrument so that a larger hole made into frame 201 could fit over and around a vertical structure protruding from the wing region 203b or 205b to further stabilize dental device 200 when it is luted together.
[0100] The undercuts make sure that once the luting material is hard, it will hold frame 201 with scan bodies 203 and 205.
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[0103] Additionally, other parts, such as the wingless scan body, can also be used during the same procedure and may have the exact shape and dimensions of conical body 203a. Having the same shape and dimensions between different parts allows for the overlapping of digital data whenever these similar parts are scanned throughout the treatment of the patient. This can be useful to capture new or changing information at different time points or milestones of the surgical procedure such as the height of the sutured gum tissue immediately after surgery. Or it can be used to capture and align new information throughout the rest of the treatment as the patient heals and they are ready to receive the final prosthesis. The wing region 203b of scan body 203 has a top surface, two side surfaces and a bottom surface. A cross-section of the wing region would be shaped like a trapezoid, with the top surface that is narrower than the bottom surface. The slanted side panels that taper up to the top surface function similarly to the conical shape of the scan body. The taper allows the intraoral scanner to capture more surface area in each photo frame as it moves over the top of the wing region.
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[0106] Scan bodies 303 and 305 are designed to be scanned only and not luted together. They are also manufactured in a material that allows for them to be reused in subsequent cases after they are sterilized. In some embodiments, scan bodies 303 and 305 comprise a milled titanium that is sand blasted or coated with a matte material that facilitates intraoral scanning. This embodiment has its own corresponding digital library available in the dental CAD software and the scan from these abutments can be used to design prosthetics for full arch dental implant fixed rehabilitation procedures. It is contemplated that these scan bodies 303 and 305 are manufactured with the highest possible manufacturing tolerances currently available at a reasonable cost. Preferably the scan bodies 303 and 305 are manufactured to tolerances within ten microns of variance to the original design specifications. It is contemplated that the digital library will consist of three-dimensional digital image files of the top and side panels of the entire wing region 303b, as well as the top and conical upper portion of the conical body 303a. With more surface area to scan and align, and tighter tolerances during manufacturing, it is contemplated that the accuracy of these scans would be good enough to design and produce prosthetics for full arch dental implant fixed rehabilitation procedures without the need for physical verification. Additionally, scan bodies 303 and 305 must be placed so that all scan bodies 303 and 305 converge at once to as small a point as possible in the center region of the dental arch. Any distance within 5 mm of each wing region tip would be sufficient but 3 mm would be better than 5 mm and any distance within 1 mm would be most ideal to ensure accuracy of the relative three-dimensional data scanned by the intraoral scanner. However, even when the distance is within 1 mm, errors during the scan are impossible to avoid in every instance. If any error is presumed or expected, it is recommended that the clinician make a physical verification jig after scanning to verify the accuracy of the design once the prosthesis is manufactured. This would allow the clinician to make adjustments or corrections before they deliver the prosthesis to the patient's jaw.
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[0114] As used herein, and unless the context dictates otherwise, the term coupled to is intended to include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms coupled to and coupled with are used synonymously.
[0115] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the amended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms comprises and comprising should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification refers to at least one of something selected from the group consisting of A, B, C . . . and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.