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System and Process for Duplication of Dentures

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Publication number
US20150037760A1
US20150037760A1 US12939136 US93913610A US20150037760A1 US 20150037760 A1 US20150037760 A1 US 20150037760A1 US 12939136 US12939136 US 12939136 US 93913610 A US93913610 A US 93913610A US 20150037760 A1 US20150037760 A1 US 20150037760A1
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Prior art keywords
denture
teeth
dentures
model
existing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US12939136
Inventor
Timothy C. Thompson
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Global Dental Science LLC
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Global Dental Science LLC
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/0003Making bridge-work, inlays, implants or the like
    • A61C13/0004Computer-assisted sizing or machining of dental prostheses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/0003Making bridge-work, inlays, implants or the like
    • A61C13/0006Production methods
    • A61C13/0009Production methods using a copying machine
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/01Palates or other bases or supports for the artificial teeth; Making same
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/10Fastening of artificial teeth to denture palates or the like
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/225Fastening prostheses in the mouth
    • A61C13/26Dentures without palates; Partial dentures, e.g. bridges
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00Dental prostheses; Making same
    • A61C13/34Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00Impression cups, i.e. impression trays; Impression methods
    • A61C9/0006Impression trays
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/50Computer-aided design

Abstract

Systems and processes for the duplication of dentures from existing dentures. The interior and exterior of the dentures are scanned and a best fit procedure is used to create a fully digitized denture. The denture teeth are selected from a library that is the closest fit to the original denture teeth. The library teeth are offset a preset distance to compensate for the best fit. The teeth are then subtracted from the digitized denture. The margins of the denture are then cleaned after subtracting the teeth. The denture base is then ready for manufacturing. The teeth are then installed onto the denture base and provided to the patient.

Description

    FIELD OF THE INVENTION
  • [0001]
    The present invention relates to the field of denture manufacture and particularly the duplication of existing dentures.
  • BACKGROUND OF THE INVENTION
  • [0002]
    Dentures are worn by a considerable number of individuals. The average life span of a denture is approximately seven years, although many individuals continue to wear dentures well beyond that time period. Additionally, dentures become ill-fitting over time due to changes in the patients anatomy. Dentures may also become damaged over time as well.
  • [0003]
    Also, some individuals may want to have a spare denture in case of the loss of the original denture or in the event of an accidental fracture of their primary denture. The cost and time of creating a new denture can often be considerable. Thus, it is often desirable to make a new denture based on an existing denture, particularly if the patient is satisfied with their existing dentures.
  • [0004]
    The duplication of an existing denture is preferable in most circumstances as the transfer of the shape of the existing dentures maintain the neuromuscular control to the new dentures. Minor modifications are often necessary as well to compensate for worn teeth and denture bases and for changes in the patients anatomy.
  • [0005]
    There are a number of techniques currently available for providing a patient with a duplicate denture. Many times a temporary denture will be fabricated by the dentist for the patient while the new denture is being fabricated. However, these temporary dentures are usually ill-fitting, uncomfortable and not intended for continued use. Duplicate dentures are normally fabricated based on the prescription and information from the individual's original dentures, if available. Often, there may be a considerable amount of time that has elapsed and such information may not be available. So rather than create a new denture from scratch, it is often more sensible to duplicate a new denture from existing dentures.
  • [0006]
    There are a number of techniques currently available for duplicating existing dentures. These techniques involve producing a mold by inserting the existing denture into a rigid container such as a duplicating flask, dental flask or other container filled with an elastic material such as alginate or silicon putty. A wax or auto-polymerizing resin template is then fabricated from the mold. This template is tried in the patient's mouth and modifications are made if necessary. Then the final denture is made and provided to the patient. Other variations include forming a wax rim instead of the auto-polymerizing resin or using a silicon putty to create the denture base. These techniques require several try-ins to ensure the proper fit in the patient and the creation of initial templates or wax rims, then the actual denture. This entails considerable time and expense for the patient.
  • SUMMARY OF THE INVENTION
  • [0007]
    The present invention provides systems and processes for the precise duplication of dentures from existing dentures. The duplicate dentures can be ready for delivery to the patient in a relatively short time frame. The duplicate denture may even be manufactured in the dentist office.
  • [0008]
    A preferred embodiment of the present invention provides systems and processes for duplicating a denture from an existing denture. The denture is scanned and the scanned images are used to create a fully digitized denture. A denture base can be fabricated from this model and denture teeth can be designed or selected from a library that is the closest fit to the original denture. The teeth in the digital model are offset a preset distance. The teeth with offset are then subtracted from the digitized denture. The margins of the denture are then cleaned after subtracting the teeth. The denture base is then ready for manufacturing. The teeth are then installed onto the denture base.
  • [0009]
    In an alternative embodiment of the present invention, the interior and exterior of the dentures can be scanned as discussed above. The dentist can also provide additional information regarding the dentures and the patient as well to ensure a proper fit. This additional information may be used to change the digitized model of the denture.
  • [0010]
    Another embodiment of the present invention may use the existing dentures to create bite impressions which are scanned along with the existing dentures. These scans are used to create a digital three dimensional image of the denture. This digital model is then used to fabricate a duplicate denture.
  • [0011]
    The digitized denture model in another preferred embodiment, may also be used to create a denture base. The teeth are subtracted from the model, and teeth are either selected from a library or the teeth may be directly fabricated from the denture information. The denture teeth are temporarily installed in the denture base. This temporary denture is then tried onto the patient. If the fit is not correct, then the denture is used as a secondary impression tray to create a set of bite impressions. These impressions are scanned and used to select or fabricate another denture base. The teeth are installed again and the denture is tried on the patient. This process is repeated until the patient is satisfied. At that point, the teeth are permanently installed, the denture is finally processed and delivered to the patient.
  • [0012]
    A preferred embodiment of the present invention creates a best fit for the duplicate denture that maintains the occlusal scheme of the existing denture. The occlusal scheme is maintained while allowing changes to the denture for anatomical, functional and aesthetic reasons.
  • [0013]
    These and other features of the claimed inventions will be evident from the ensuing detailed description of preferred embodiments, from the drawings and from the claims.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0014]
    FIG. 1 is a diagram of the work flow process of one preferred embodiment.
  • [0015]
    FIG. 2 is an illustration of a denture to be duplicated.
  • [0016]
    FIG. 3 is an illustration of the scanned images of the denture.
  • [0017]
    FIG. 4 is an illustration of a digital three dimensional model of the denture.
  • [0018]
    FIG. 5 is another view of the digital model of the denture.
  • [0019]
    FIG. 6 is an illustration of the digital denture model.
  • [0020]
    FIG. 7 is an illustration of the model with an offset added to the teeth.
  • [0021]
    FIG. 8 is an illustration of the digital denture with the teeth being subtracted.
  • [0022]
    FIG. 9 is an illustration of the digital denture base being cleaned after the teeth has been subtracted.
  • [0023]
    FIG. 10 is an illustration of the machined denture base.
  • [0024]
    FIG. 11 is another view of the machined denture base.
  • [0025]
    FIG. 12 is a view of the duplicated denture.
  • [0026]
    FIG. 13 is another view of the duplicated denture.
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • [0027]
    The present invention provides systems and process for the duplication of dentures. Descriptive embodiments are provided before for explanatory purposes. It is to be expressly understood that the present invention is not be limited to these descriptive embodiments. Other embodiments are considered to be within the scope of the present invention, including without limitation the use of the present invention for other applications, such as denture duplication, dental implants, and other dental and orthodontic applications. The descriptions below discuss the systems of the present invention as used in dental labs, but it is to be expressly understood that these systems could also be implemented in the dentist office or through a network allowing interaction between the dentist and the dental lab through the systems. The processes and systems of the present invention may also be used in combination with all or parts of the following co pending applications filed on Nov. 3, 2010, entitled System and Processes for Forming Anatomical Features in Dentures, Ser. No. 12/939,138; System and Process for Optimization for Dentures, Ser. No 12/939,141; Combination Tool for Anatomical Measurement for Denture Manufacture, Ser. No. 61/409,914; and Removable Handle for Use with Dentures, Ser. No. 12/939,143, all of which are hereby incorporated herein by reference.
  • [0028]
    The terms denture base generally refers to the part of a denture that fits the oral mucosa of the basal seat, restores the normal contours of the soft tissues of the edentulous or partly edentures mouth, and supports the artificial teeth. The term denture refers to the denture base with the artificial teeth attached.
  • Overview
  • [0029]
    A preferred embodiment of the present invention provides systems and processes for duplicating a denture from an existing denture. The denture is scanned and a best fit procedure is used to create a fully digitized denture. An offset is added to the overall dimension of the denture teeth. The denture teeth with the offset are then subtracted from the digitized denture model. The margins of the denture are then cleaned after subtracting the teeth. The denture base is then ready for manufacturing. The teeth are then installed onto the denture base.
  • Process
  • [0030]
    A preferred embodiment of the present invention is disclosed that allows new dentures to be created from an existing denture. The patient provides their existing dentures to the dentist for scanning. Digital scans 30, 32 are created from the inside and outside of the original denture 20 as shown in FIGS. 2 and 3. Once the scans are performed, the denture can be returned to the patient. The system, as shown in the work flow diagram of FIG. 1, applies a series of routines to create a digital three dimensional model 40 of the existing denture as shown in FIGS. 4 and 5.
  • [0031]
    This digitized denture model 40 is then digitally compared with denture teeth from a library to select the best fitting denture teeth 50 in the scanned model as shown in FIG. 6. The denture teeth 50 are then offset by a preset amount as shown in FIG. 7. This adds an overall thickness to the teeth. The teeth are then digitally subtracted from the digitized denture model as shown in FIG. 8. The offset added to the teeth creates slightly larger pockets in the denture base. The margins are then cleaned after the teeth have been subtracted as shown in FIG. 9. This creates a digital model 60 of the denture base for the patient as shown in FIG. 10.
  • [0032]
    The denture teeth may be either selected from a library or fabricated from the digital model in a number of process. In this preferred embodiment, the denture base is machined in acrylic based on the digital model 60. This can be done relatively quickly. Once the denture base 70 has been fabricated as shown in FIGS. 10 and 11, the teeth 72 are installed and delivered to the patient for try-in and use as shown in FIGS. 12 and 13.
  • [0033]
    This entire process can be done in a relatively fast time frame. In some instance, the duplication process can take place in the dentist offices. In other instances, the scanned images of the existing denture can be transmitted to a nearby dental lab where the denture is fabricated and courier to the dentist.
  • [0034]
    In an alternative embodiment of the present invention, the interior and exterior of the dentures can be scanned as discussed above. The dentist can also provide additional information regarding the dentures and the patient as well. For example, the dentist may notice that the dentures are no longer properly fitting due to wear of the denture base or the teeth or due to changes in the patient's anatomy. This additional information may be used to change the digitized model of the denture.
  • [0035]
    In yet another alternative embodiment of the present invention, the dentist may provide additional information beyond the scanned images of the interior and exterior of the dentures. The dentist may use those existing dentures as an impression tray to take bite impressions of the patient. Those bite impressions are then scanned and used along with the scanned images of the interior and exterior of the dentures to create the digitized denture.
  • [0036]
    The occlusal scheme of the existing denture is maintained in the duplicate denture. The duplicate denture can be modified to accommodate anatomical, aesthetic and functional changes that might be necessary.
  • [0037]
    The digitized denture model 40, in another preferred embodiment, may also be used to create a model for a denture base. The teeth are subtracted from the model, and a denture base is directly fabricated from the denture base information. A denture base is then fabricated, the margins are cleaned and teeth are temporarily installed. This try-in denture is then tried onto the patient. If the fit is not correct, then the denture is used as a secondary impression tray to create a set of bite impressions. These impressions are scanned and used to select or fabricate another denture base. The teeth are installed again and the denture is tried on the patient. This process is repeated until the patient is satisfied. At that point, the teeth are permanently installed, the denture is finally processed and installed to the patient.
  • [0038]
    A preferred embodiment of the present invention may be implemented in a number of ways.
  • [0039]
    The above descriptions are intended for explanatory purposes and are not meant to the limit the scope of the claimed inventions. Other embodiments may be covered under the claims as well.

Claims (7)

1. A computer implemented method for duplicating dentures from an existing denture, said method comprising the steps of:
taking a scan of the existing denture;
creating a digital three dimensional model of the denture from the scan of the denture;
manufacturing a denture base from the digital denture model; and
installing the teeth to the denture base.
2. The method of claim 1 wherein said step of manipulating the digital mode includes:
fitting digital denture teeth from a library to the digital denture;
offsetting the denture teeth by a predetermined amount;
subtracting the teeth from the digital denture; and
cleaning the margins from the digital denture.
3. The method of claim 1 wherein the step of a creating a digital three dimensional model includes:
offsetting the teeth by a preset amount; and
subtracting the teeth and offset from the model.
4. The method of claim 1 wherein said step of taking a scan of the existing denture includes:
taking a scan of the interior of the existing denture; and
taking a scan of the exterior of the existing denture; and
merge the scans together to form one model.
5. The method of claim 1 wherein said method further includes:
providing additional information to correct the fit of the existing dentures to improve the fit of the duplicate denture.
6. The method of claim 1 wherein said method further includes:
using the existing denture as an impression tray;
taking bite impressions using the existing denture;
scanning the bite impressions; and
using the bite impression scans with the denture scans to create a digital model of the dentures.
7. A system for creating a duplicate denture from an existing denture, the system comprising:
a processing device configured to execute computer-readable code;
a memory device connected to said processing device for storing computer-readable code;
an interface for receiving data relevant to a particular patient and storing said data in said memory device;
a rendering engine for creating a digital three dimensional model of the existing dentures from scans of the existing image;
a selection engine for selecting the denture teeth that best fits the digital denture model;
a manipulation engine adding a preset amount to the denture teeth, for subtracting the denture teeth from the denture model and for cleaning the margins of the denture model.
US12939136 2010-11-03 2010-11-03 System and Process for Duplication of Dentures Abandoned US20150037760A1 (en)

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US12939136 US20150037760A1 (en) 2010-11-03 2010-11-03 System and Process for Duplication of Dentures
PCT/US2011/059239 WO2012061659A3 (en) 2010-11-03 2011-11-03 System and process for duplication of dentures
US13823466 US9717572B2 (en) 2010-11-03 2011-11-03 System and process for duplication of dentures
EP20110838843 EP2635233A4 (en) 2010-11-03 2011-11-03 System and process for duplication of dentures
US15487261 US20170215999A1 (en) 2010-11-03 2017-04-13 System and process for duplication of dentures

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US13823466 Continuation US9717572B2 (en) 2010-11-03 2011-11-03 System and process for duplication of dentures
US201313823466 Continuation 2013-03-14 2013-03-14

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US15487261 Pending US20170215999A1 (en) 2010-11-03 2017-04-13 System and process for duplication of dentures

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US20140343707A1 (en) * 2011-11-25 2014-11-20 Invibio Limited Prosthodontic device
US9055993B2 (en) 2013-08-29 2015-06-16 Global Dental Science Llc Denture reference and registration system
US9155599B2 (en) 2010-11-03 2015-10-13 Global Dental Science Llc Systems and processes for forming anatomical features in dentures
US9213784B2 (en) 2010-11-03 2015-12-15 Global Dental Science Llc System and process for optimization of dentures
US9364302B2 (en) 2012-02-08 2016-06-14 Global Dental Science Llc Process and systems for molding thermosetting plastics
US9402698B2 (en) 2010-11-03 2016-08-02 Global Dental Service LLC Systems and processes for forming anatomical features in dentures
US9717572B2 (en) 2010-11-03 2017-08-01 Global Dental Science, LLC System and process for duplication of dentures
US9744010B2 (en) 2014-03-03 2017-08-29 Global Dental Science, LLC System and method for manufacturing layered dentures
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