Abstract
A customized oral irrigator which is adapted to the user's dentition, has multiple nozzles or cutout openings to point to the area to irrigate. User can anchor such device by biting with the teeth and irrigate the teeth and gum, especially between the teeth and under the gum, in one instance. Such a device is fast and effective. It will be beneficial to everyone but will especially benefit busy professionals, children, seniors, handicapped, disabled, and other users who have difficulty cleaning teeth, for example people who wear dental devices such as braces. This device is meant to combine oral care procedures such as tooth brushing and dental flossing in one instance and will yield better dental hygiene and with better compliance than conventional brushing and flossing and conventional single channel oral irrigators.
Claims
1. A computer-implemented method for producing appliances to irrigate teeth and gum, comprising: providing an initial digital data set representing teeth and gum geometry and conditions; specifying a configuration for a set of nozzles or cutout openings along one or more appliances in the digital data set, wherein the one or more appliances are configured to conform to the teeth and gum geometry from the digital data set, and wherein the set of nozzles or cutout openings are configured according to an optimization function to provide irrigation to the teeth and gums; and producing the one or more appliances having the set of nozzles or cutout openings in accordance with the digital data sets.
2. A method of claim 1 wherein providing the initial digital data set representing teeth and gum geometry and conditions comprises scanning a three-dimensional model of teeth and gums of a subject.
3. A method of claim 1 wherein providing the initial digital data set representing teeth and gum geometry and conditions comprises photographing one or more images of teeth and gums of a subject.
4. A method of claim 1 wherein providing the initial digital data set representing teeth and gum geometry and condition comprises providing the initial digital data set via x-ray, ultrasound, infrared, CT scan, or MRI of teeth and gums of a subject.
5. The method of claim 1 wherein providing the initial digital data set representing teeth and gum geometry and conditions comprises inputting a digital representation of a closed and open bite relationship of the teeth.
6. The method of claim 1 wherein specifying a configuration for a set of nozzles or cutout openings comprises specifying spray direction, fluid volume, fluid pressure, or fluid velocity.
7. The method of claim 1 wherein the optimization function comprises finite element analysis, finite difference analysis, flow dynamics analysis, or experimental data optimization.
8. The method of claim 1 wherein the optimization function comprises a device volume minimization algorithm, a device cost minimization function, assignment of weight functions for arch regions, or assignment of a fan out function for arch regions.
9. The method of claim 1 wherein the optimization function comprises assignment of an inner wall cut out opening function for arch regions, wherein the cut out opening is angled counter to a direction of water flow.
10. The method of claim 9 wherein the cut out opening is further configured as a curved or arcuate shape at an inflow incisor area.
11. The method of claim 1 wherein the optimization function comprises placing a movable part inside inner wall cut out opening to modulate water spray.
12. The method of claim 1 wherein the optimization function comprises providing supporting posts along an inner surface of the one or more appliances to provide a clearing to the teeth.
13. The method of claim 1 wherein the optimization function comprises providing an enclosure wall snap fit for contacting against the gum to prevent excess liquid from entering a mouth of a subject.
14. The method of claim 1 wherein the optimization function comprises providing a drain for removing excess liquid.
15. The method of claim 1 wherein producing the one or more appliances comprises fabricating a mouthpiece.
16. The method of claim 15 wherein the mouthpiece includes a buffer part.
17. The method of claim 16 wherein the buffer part comprises a diaphragm and flow connectors for passing liquid.
18. The method of claim 1 wherein the one or more appliances comprise a mouthpiece having an inflow pipe for receiving liquid from a pump which is in fluid communication with the set of nozzles or cutout openings.
19. The method of claim 1 wherein producing the one or more appliances comprises a mouthpiece having at least one post structure to offset the mouthpiece from teeth.
20. The method of claim 1 wherein producing the one or more appliances comprises a mouthpiece having a thin plate design which follows a surface curvature of dentition.
21. The method of claim 1 wherein producing the one or more appliances comprises a mouthpiece having an upper piece and a lower piece which are configured to connect to one another.
22. The method of claim 1 further comprising prewashing the one or more appliances prior to use by a subject.
23. A computer program product, for producing appliances to irrigate teeth and gum, comprising instructions operable to cause a programmable processor to: generate a digital representation of a mouthpiece; specify a set of nozzles or cutout openings and their desired spray properties: aim, liquid pressure, velocity, spray pattern to irrigate the teeth and gum through nozzles or cutout openings arrangements, wherein at least some of the nozzles or cutout openings arrangements are represented by digital data sets, wherein specifying a design of spay properties comprises irrigation teeth and gum according to an optimization function; and generate one or more appliances in accordance with the digital data sets wherein the appliances comprise a mouthpiece having inflow pipe to receiving liquid from a pump, and nozzles or cutout openings to spray out liquid through according desired spray property to irrigate the teeth and gum.
24. A system for treating teeth and gum, comprising: a processor; a display device coupled to the processor; and a data storage device coupled to the processor, the data storage device storing instructions operable to cause the processor to: generate a digital representation of a mouthpiece; specify a set of nozzles or cutout openings and their desired spray properties: aim, liquid pressure, velocity, spray pattern to irrigate the teeth and gum through nozzles or cutout openings arrangements, wherein at least some of the nozzles or cutout openings arrangements are represented by digital data sets, wherein specifying a design of spay properties, comprises irrigation teeth and gum according to an optimization function; and; generate one or more appliances in accordance with the digital data sets wherein the appliances comprise a mouthpiece having inflow pipe to receiving liquid from a pump, and nozzles or cutout openings to spray out liquid through according desired spray property to irrigate the teeth and gum.
25. The system of claim 24 wherein specify further comprises instructions to generate the digital data sets based on initial digital data sets until the digital data set representing the acceptable spray properties are achieved.
26. The system of claim 24 wherein the optimization function comprises irrigate teeth using flow analysis tools, simulated pipe management tool, genetic algorithm, cost minimization, or space minimization algorithm.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 illustrates a customized and personalized oral irrigation device, where the mouthpiece is custom made contoured with a user's dentition, and the inflow pipe, drain pipe and nozzles or cutout openings, in accordance with an embodiment of the present invention.
[0028] FIG. 2 illustrates a customized liquid flow control design, where the goal is to achieve each desired spray properties of each nozzle or cutout openings, where small reservoir and flow blockage are used, in accordance with an embodiment of the present invention.
[0029] FIG. 3 illustrates another customized liquid flow control design, where the goal to achieve each desired nozzle or cutout openings spray properties, where different flow paths are used, in accordance with an embodiment of the present invention.
[0030] FIG. 4 illustrates the design flowchart of a customized oral irrigation device, in accordance with an embodiment of the present invention.
[0031] FIG. 5 illustrates the design of using flow analysis system to analyze, sometimes iteratively, to achieve the desired spray properties, in accordance with an embodiment of the present invention.
[0032] FIG. 6 illustrates the cross section of the design of a customized oral irrigation device, where the device is offset from the crown part of teeth, leaving room for liquid to power spray to the crown, and in snug contact to the gum, in order to control outflow liquid and drain, in accordance with an embodiment of the present invention.
[0033] FIG. 7 illustrates another customized oral irrigation device, where the mouthpiece is custom made contoured with a user's dentition, and each dental arch is made as a separate unit. The diaphragm is made to have the inflow pipe, connectors to the separate mouthpiece, which provides inflow and drain for each arch mouthpiece, in accordance with an embodiment of the present invention.
[0034] FIG. 8 shows the occlusal view of the diaphragm, a horseshoe like shape adapt to upper and lower arch shapes.
[0035] FIG. 9 provides detailed steps on how the mouthpieces and the diaphragm are designed.
[0036] FIG. 10 illustrates such workflow with diaphragm.
[0037] FIG. 11 illustrates a supporting structure design which offset mouthpiece away from the teeth to give proper anchorage and wash space
[0038] FIG. 12 illustrates a thin shell design, where the device is made of closed volume between two thin plates, where such thin plates usually contoured with tooth surface, and have internal supporting structure.
[0039] FIG. 13 illustrates a method that one or more flexible material part connects upper and lower parts, such adjustment adapts to bite estimation error.
[0040] FIG. 14 illustrates another embodiment, mating feature.
[0041] FIG. 15 illustrates the enclosure for prewash device
[0042] FIG. 16A illustrates the cross section of a water spray channel inner wall
[0043] FIGS. 16B and 16C illustrate the cross section of a water spray channel inflow direction related to anterior (A) and posterior (P) teeth.
[0044] FIG. 17 illustrates the cross section of water spray channel inner wall where a movable part is placed.
[0045] FIG. 18 illustrates the workflow how such design is achieved.
DETAILED DESCRIPTION OF THE INVENTION
[0046] Disclosed herein are various embodiments of a custom-made oral irrigation device. Referring to FIG. 1, the device 101 is shaped like a mouth guard, but custom designed to offset from the user's crown to a distance, usually larger than, e.g., 0.1 mm but smaller than 100 mm Custom designed anchor posts 102 are designed to anchor the irrigation device to the teeth. An inflow pipe 103, often connected to an out of mouth pumping unit, is used to pump in irrigation liquid. The inflow pipe is connected to multiple nozzles or customized cutout openings 104 (only few are shown as examples), which are again custom designed to aim at desired areas. One or more drain holes 105 are designed, either to pump or drain excess liquid out of the device. Each nozzle or cutout openings is custom designed to reach required spay properties: flow pressure, flow speed and flow volume depending on the area of irrigation, tooth sensitivity, cleanness of teeth or gum.
[0047] In another embodiment, multiple units of inflow, nozzles or cutout openings and drain hole are designed, so teeth can be irrigated a section at a time. This design may be desirable for miniaturizing the irrigation pumping units, especially desired for portability or travel, or the need to have the pump powered by battery.
[0048] On the inner surface of the irrigation device, a camera or sensor maybe installed to sense the cleanness of the corresponding area, the proper control units can be installed to adjust the irrigation process based on the sensing data.
[0049] The inflow liquid can include, but not limited to, whitening, bleach, cleaning solution, anesthesia or water, which can be controlled from the outside with any desired inflow sequence.
[0050] Once the liquid is pumped into the inflow pipe, it disperses through channels specially designed inside the irrigation device, and eventually come out to each individual nozzle or cutout openings. Each nozzle or cutout openings is custom designed to aim at areas of interest with desired flow control such as but not limited to velocity, pressure, volume, pulsing patterns. To better manage flow, different designs are implemented. FIG. 2 shows one of the implementations for flow control. Once inflow 201 comes in, special reservoirs 202 are designed to hold the liquid to volume and to better control fill speed. Sometimes, some blockage unit 203 is designed, combining reservoirs and blockage. FIG. 3 shows another implementation for flow control. Once inflow 301 comes in, special paths 302, e.g., often curved, are designed to guide the liquid to travel in certain patterns in order to reach the desired pressure, volume and velocity at the nozzles or cutout openings 303.
[0051] FIG. 4 describes more detailed steps on how the mouthpiece device is designed. First, 401, a digital representation of user dentition is acquired. Such acquisition can be done by taking a dental impression and using the scanner to scan it; or using an intraoral scanner like the Trios® scanner (3Shape A/S, Copenhagen, Denmark) to scan user teeth directly. Sometimes, just using an intraoral camera or a mobile phone camera can obtain a good dentition model due to high quality photos and better image registration tools of those devices. Then, 402, the teeth and gum are identified. Often an AI based tool like uDesign software, developed by uLab Systems Inc. (Redwood City, Calif.), can detect such features automatically. Then 403, the teeth part is dilated to leave room for nozzles or cutout openings to spray. Some sharp features are smoothed as well. A detailed process will be described in FIG. 6, which shows a cross section display. Various fitting posts are designed to anchor the mouthpiece to the teeth 404 firmly and keep most of the mouthpiece area to desired distances. The post may have sensors in place, which detect whether the mouthpiece is properly place to teeth, the nozzles or cutout openings, inflow pipe or pipes and drains layout is designed 405 including the desired spray properties: pressure, aim, velocity, etc. 406, the internal mouthpiece is deigned to achieve the desired nozzle or cutout opening behavior. And the outer surface is designed to encapsulate the pipes and reservoirs. Such design is outputted to a manufacturable process to produce the mouthpiece device; such manufacture process can be but not limited to a 3D printing process.
[0052] One of the desirable features is flow control and how-to custom design a mouthpiece which takes the inflow and distribute the liquid to various nozzles or cutout openings properly, with the right flow amount, velocity, pressure etc. FIG. 5 illustrates one of such design flowcharts. First 501, a 3D user mouthpiece model is inputted. Then 502 inflow pressure and outflow desired nozzle or cutout opening flow are inputted as well. Based on the inputs, and preliminary calculation, an initial design of pipes, reservoirs or blockage are designed and lay inside the mouthpiece model. The proper flow analysis tools adopted are based on the model 503. Such analysis tool can be but not limited to a finite element analysis model, where pipes, reservoirs, blocks are meshed to individual finite elements. These elements can be but not limited to tetrahedron or hexahedron elements; such mesh can be generated by gridding of the known pipes, reservoirs, blocks from known template. Running the flow analysis to generate the simulated nozzles or cutout openings flow properties 504, including pressure, velocity, spay range etc. Then 505, compare the above results with desired outcomes and check the tolerance, if the results are within the range of the desired outcome, we have achieved a preliminary design. Otherwise, based on the discrepancy, modify the design of pipes, reservoirs or blockage, go through the design process again, 507, until one of the designs converges to with the nozzle or cutout openings property tolerance 506. Sometimes, but rarely, due to special mouth conditions, the mouthpiece profile may need to be altered as well. The above process will be needed for each customized and individualized mouthpiece produced.
[0053] To manage the flow and drain better, it is preferable to enclose the space between inner surface and teeth, FIG. 6 provides a more detailed illustration of a cross-section profile with the mouthpiece and teeth where 601 is the teeth/crown part, 602 is the related gum, the mouthpiece device 603 has an offset or clearance 604 to the crown 601, and snug fit or contact to the gum 605. A clearance between the teeth and the device is achieved by placing various anchor posts 606 in the mouthpiece; such clearance enables the nozzle or cutout opening 607 to spray teeth effectively and excess liquid can be drained effectively. This is especially useful for children, seniors, and disabled, who may not be able to handle mouth liquid well and can swallow it accidently.
[0054] Inflow pipe usually comes in through the facial surface of incisor, a flow dynamic algorithm is developed, to enable liquid to dispatch through device distally as quickly as possible. In order to make the device easy to put on and comfortable to use, usually we maintain the thickness of buccal and occlusal surface as thin as possible. In order to allow maximum pass through, for anterior teeth, the thickness can be increased on the lingual side, and the height can be increased on the buccal side as well. Such optimization is usually achieved by assigned weight factors in regions to simulate the required device shape to reach the desire spay property.
[0055] In order to push items from interproximal area out, the nozzles or cutout openings are fanned out to graduate towards to occlusal surface when possible, so wash push towards occlusal surface. For the gum region, nozzles or cutout openings are fanned out from a low gum point sideways to both sides to gradually point up.
[0056] FIG. 7 illustrates another embodiment of a custom-made oral irrigation device, where the mouthpiece is custom made contoured with the user's dentition, and each dental arch 701 is made as a separate unit. A diaphragm 702 is made to sit in between the two mouthpieces, with the cross-section shown here, and connects to the inflow pipe, with the reservoir 703 holding liquid. It also has pipe connectors 704, maybe in a female feature to the receiving connectors 705 maybe in a male feature of each mouthpiece. A similar configuration can be used for draining management as well, which provides inflow and drain for each arch mouthpiece, in accordance with an embodiment of the present invention.
[0057] FIG. 8 shows the occlusal view of the diaphragm, a horseshoe like shape adapt to upper and lower arch shapes. Several connectors 801 to connect the flow to upper and lower arches. The connectors can connect to separate reservoir cells 802, and each cell connects to the main inflow pipe 803 or each other serially towards main inflow pipe 803. Outflow or drainpipes are managed in a similar fashion. Such management can give a better flow control because valves can be placed between cells to control each cell to reach desired pressure. Such design also allows the mouthpiece to be sections instead of individual cells, section by section, resulting in a simpler internal flow pipe, blockage, reservoir design.
[0058] FIG. 9 provides detailed steps on how the mouthpieces and the diaphragm are designed. First, 901, a digital representation of user dentition is acquired, such acquisition can be done by taking a dental impression and using the scanner to scan it; or to use an intraoral scanner like Trios to scan user teeth directly. Sometimes, just use intraoral camera or a mobile phone camera can obtain a good dentition model due to the high-quality photos and better image registration tools in such devices. Then user's open bite relationship 902 is obtained, user can take open bite impression to register it to both arches, or open bite scan or image to register to both arches. Sometimes this can be calculated by putting both lower and upper arches to a best bite fitting position without bite impression or bite scan or bite image. The open bite relationship is different than typical bite relationship, it needs to articulate the teeth to an open bite position which creates space for both mouthpieces and have enough space for a middle diaphragm to be inserted in the middle. In order to have the right clearance, a special bite block or impression tray maybe needed to take open bite impressions or scans when the user has the needed open bite position. Then, follow the same steps described in FIG. 4 to design both mouthpieces, with consideration for the diaphragm to make sure the connectors are within the right range. If needed, adjust the bite relationship 904. With each mouthpiece in place, design the diaphragm to adapt to both mouthpieces 905. Design flow mating connectors between diaphragm to upper arch and diaphragm to the lower arch to manage the inflow from diaphragm to mouthpieces and outflow from mouthpieces to diaphragm 906. The diaphragm can be premade to several types to cover all dental arch shapes.
[0059] FIG. 10 illustrates such workflow: step 1001 is same as step 901, and step 1002 is same as step 902. One of premade diaphragm is selected by compare the best match to the arch forms of both upper and lower arches 1003. While middle diaphragm is place, adjust the bite relationship if needed to have enough space for both mouthpieces 1004. Both mouthpieces are designed to adapt to selected diaphragm 1005. Then the corresponding connectors to match the selected diaphragm are designed. The corresponding inner pipes and drains are designed as well.
[0060] Although this design may snap upper and lower pieces to the diaphragm before use, it has several advantages: [0061] 1. The diaphragm and mouthpieces can be fabricated in different materials for their uses. In one example, the diaphragm can be made using durable rubber like material which has the desired reservoirs, while the mouthpieces can be made using harder material e.g. ABS which provides designed spray properties. [0062] 2. The diaphragm and mouthpieces can be fabricated by different manufacturing methods, e.g. mouthpieces can be 3D printed to adapt the complex design of pipe, blockage and reservoir structures. But it is harder to place electronic elements in such a structure due to its complex shape and its needs for water resistance. However, if the diaphragm is made by other method, e.g. casting, electronic elements can be placed inside easily. In addition, when needed, the mechanical flow control elements can be placed in it easily as well. For example, the diaphragm can be divided into smaller cells and each cell can have its own outflow and drain, services a small section of the mouth, and have valves that can be switched on and off at different times, like sprinklers. This is important if low power pump unit is needed, e.g. in a traveler kit powered by a battery pack. [0063] 3. As described in FIG. 10, the diaphragm can be premade to several standard shapes based on common arch forms, then instead of custom making individual custom diaphragm, best match method can be used to find and select the best pre-fabricated diaphragm and alter mouthpieces design to the diaphragm. This may reduce the manufacturing cost. [0064] 4. As the diaphragm can be made with slightly soft material, it tolerates well to the open bite design error and provides some cushion in order to bite the device to teeth properly. [0065] 5. Cost of electronics and flow control elements is high, it is thus economical if they are placed in the diaphragm which lasts longer than the mouthpieces. Mouthpieces can be 3D printed to many sets to fit the same diaphragm. So overall cost will be lower in this design. [0066] 6. User mouth condition may change over time. When it does, only new design of mouthpieces will be necessary, and the new design may fit the current diaphragm in use instead of having to replace all three pieces.
[0067] The liquid pump is a standard pump, which has the connector to the inflow pipe. On the pump, a timer maybe installed to record usage of the device and such data can be transmitted wirelessly to a mobile device, which can also have software installed to analysis the data. Similarly, sensors or cameras can be mounted to mouthpieces as well to detect cleanness or effectiveness of irrigation, and such data can be transmitted to a mobile device which can adjust the flow control of the area accordingly. Of course, the user can adjust the flow control without sensor data, e.g. user can reduce an area flow due to sudden tooth pain.
[0068] Usually such a device is electrically powered by using an electric outlet, but it can also be powered by a battery, or to extreme, a manual crank.
[0069] Special accessories can be attached or snapped on to the nozzles or cutout openings, e.g. a tiny brush or a flexible toothpick.
[0070] FIG. 11 illustrates supporting structure design, where small posts 1101 are designed to anchor the device on tooth also make sure clearing 1102 to the tooth surface so liquid can flow out quickly after wash. The post is usually between, e.g., 1 mm to 20 mm, in height.
[0071] FIG. 12 illustrates a thin shell design, where the device is made of closed volume between two thin plates 1201, where such thin plates usually contoured with tooth surface. This allows quick water flow 1202 from side arch to side efficiently, supporting posts 1203 also placed inside shell to make sure device has strength to resist bite pressure.
[0072] FIG. 13 illustrates a method that one or more flexible material part connects upper and lower parts, the flexible part can be insert to a post predesigned. This gives the flexibility to accommodate the bite variation or incorrect modeling. In such case, upper part 1301 and lower part 1302 are printed separately, but it is more convenient if two parts can be placed in one insert. The insert 1303 can adapt and connect the two, and 1303 can be adjust as well.
[0073] FIG. 14 illustrates another embodiment, mating features 1401, shown here in one example but not limited to ball and socket design, are designed and attached to upper and lower parts, hence paper and lower parts can be printed together, and connected with the mating features, the features also provide some flexibility for modeling tolerance.
[0074] In order to keep the device sanitary, before use it is placed in mouth, a prewash cycle may be adopted, where the liquid may prewash the internal surface of the device prior to being placed on the teeth, the external surface like buccal surface can either be rinsed by placing device in an enclosure. FIG. 15 illustrates the enclosure 1501, it may have external wash head 1502 which washes the device properly.
[0075] Unlike prior art, which have predesign template nozzles layout through the teeth surface, the cutout is implemented through the inner shell wall, such cutout may be comprised of thin channels through the wall, may have different internal curvature, incisors have narrower and curvy inflow channels and posteriors have wider and straight channels; interproximal area and gum line region have wider and straight channels. Such channels are complex to make in traditional manufacturing method, but easier to use 3D printing technology.
[0076] FIG. 16A illustrates the cross section of a water spray channel inner wall, it is not circular like sprinkles, but a continuous cut through slots along interproximal curve and gum line with connection structures to support, like a crack along a wall. The cut can have different thickness and curvature along the way. And for front teeth, the crack can be curvier 1602 and for back teeth, the crack can be relatively straighter 1603. The CFD may be used to determine a way to deliver efficiently liquid from anterior teeth (A) to posterior teeth (P) quickly with the constraint as shown in FIGS. 16B and 16C. Where 1604 at incisor area the channel or crack may be angled more against the flow direction to allow liquid to pass through quickly, to the posterior, and where the posterior is the opposite, the channel or crack may be angled toward the direction of the liquid flow to better receive the water flow 1605. Similarly, different height can be played as well.
[0077] FIG. 17 illustrates the cross section of water spray channel inner wall where a movable part 1701 may be placed. With 3D printing technology, the movable part can be printed, which enables water to spray out of outlet with different pattern.
[0078] FIG. 18 illustrates the workflow, 1801 a digital model is received, the proper orientation is set, 1802 the proper bite relationship is adjusted, and an open bite relationship when the device is on is calculated. The gumline is detected and adjusted 1803, the interproximal line or region is detected and adjusted 1804 based on gumline and interproximal information, and proper offset value is provided, offset value can be different based on the tooth type and region of interests 1805, a single blanket inner mesh is generated 1806, this mesh can be topologically different or re-meshed 1807 to more suitable for manipulation and storage, this is the inner (closed to teeth) surface mesh of device outer body. The region can grow this mesh and generate the outer layer of the mesh, making it a watertight closed mesh, which defines the entity of out surface device body and insert or deform mesh structure to add inflow and optional outflow pipes. Again, the single mesh may be used to make future pipe and device deformation easier, and make sure the smooth transition between pipe and device.
[0079] Assuming the device maintain certain thickness, 1808 computational fluid dynamics or simpler region grow based on flow speed and volume, or advancing front based on flow flux front vectors are used to adjust our surface of device mesh to achieve the desired spay property in all regions, this can be an interactive process by keep changing the mesh and calculate the flow in regions, calculate the error tolerance, then re-adjust the mesh until all errors are within specified tolerance. The offset the outer surface inward to generate a shell solid model 1809, sharp edge is blended. The nozzles or cutout openings are implemented based on regions spay angle and pressure requirements 1810. Optionally, a movable part may be designed 1811 to modulate the spray pattern. External posts from device to teeth may be placed 1812 to anchor device to teeth, place internal posts between two walls to strengthen the device structure. Then complete mesh is output for fabrication, most likely 3D printed.
[0080] Due to device maybe used daily, sensors can be place inside to sense varies teeth conditions, e.g. teeth decay, particular enzyme etc.
[0081] Modification of the above-described assemblies and methods for carrying out the invention, combinations between different variations as practicable, and variations of aspects of the invention that are obvious to those of skill in the art are intended to be within the scope of the claims.
