Methods of Designing and Manufacturing Customized Dental Prosthesis For Periodontal or Osseointegration and Related Systems

• US 20190282331A1
• Filed: 06/05/2019
• Published: 09/19/2019
• Est. Priority Date: 10/16/2006
• Status: Active Grant

• Current Assignee: RTRS Investment LLC
• Original Assignee: Natural Dental Implants AG
• Inventors: Rubbert, Ruedger, Berndt, Ernst-Ulrich Gerhard, Marquard, Jakob Sebastian, Schmidt-Martens, Hauke, Nesbit, Lea Ellermeier
• Granted Patent: US 11,497,583 B2
• Time in Patent Office: Days
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 13/0013 using stereolithographic techniques
• CPC Class Codes: A61C 13/0019 using three dimensional printing
• CPC Class Codes: A61C 13/082 Cosmetic aspects, e.g. inlays; Determination of the colour A61C19/10 takes precedence
• CPC Class Codes: A61C 5/30 Securing inlays, onlays or crowns
• CPC Class Codes: A61C 8/0006 Periodontal tissue or bone regeneration support means for endoprosthetic bone substitute or bone graft implants A61F2/2846
• CPC Class Codes: A61C 8/0012 characterised by the material or composition, e.g. ceramics, surface layer, metal alloy use of specific materials A61K6/00
• CPC Class Codes: A61C 8/0018 characterised by the shape
• CPC Class Codes: A61C 8/0036 Tooth replica
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/0075 Implant heads specially designed for receiving an upper structure if separable from the implant A61C8/005
• CPC Class Codes: A61C 9/0046 Data acquisition means or methods
• CPC Class Codes: A61K 6/58 specially adapted for dental implants
• CPC Class Codes: A61L 2430/12 for dental implants or prostheses
• CPC Class Codes: A61L 27/3804 characterised by specific cells or progenitors thereof, e.g. fibroblasts, connective tissue cells, kidney cells
• CPC Class Codes: A61L 27/3865 Dental/periodontal tissues
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Abstract

Methods of manufacturing dental prosthesis/implants each to replace a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient are provided. An example method includes the steps of receiving imaging data such as x-ray image data and surface scan data of a dental anatomy and/or a physical impression of the dental anatomy of a specific preidentified patient. The steps can also include forming a three-dimensional virtual model of at least portions of a non-functional natural tooth positioned in the jawbone of the specific pre-identified patient based on the imaging and surface scan data, virtually designing a dental implant based upon the virtual model, exporting the data describing the designed dental implant to a manufacturing machine, and custom manufacturing the dental implant for the specific patient.

Claims

1. A method of manufacturing a dental implant to replace a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient, the method comprising the steps of:

receiving and accessing data describing an in-vivo dental anatomy of the specific pre-identified patient associated with the non-functional natural tooth prior to removal from the jawbone of the specific pre-identified patient, the in-vivo dental anatomy to include a three-dimensional outer surface shape of at least portions of a root of the non-functional natural tooth, and a three-dimensional outer surface shape of at least portions of a crown of the non-functional natural tooth and surrounding gum tissue to define received data comprising received in-vivo imaging data;

forming at least one three-dimensional virtual model of at least portions of the non-functional natural tooth positioned in the jawbone of the specific pre-identified patient responsive to at least portions of the received in-vivo imaging data, the at least one three-dimensional virtual model of the non-functional natural tooth including a modeled virtual root portion and a modeled virtual crown portion; and

designing the dental implant based upon the at least one three-dimensional virtual model of at least portions of the non-functional natural tooth, the step of designing the dental implant including the steps of;

deriving a virtual occlusally-facing prosthesis interface shape from a virtual reduction of at least a substantial portion of the modeled virtual crown portion;

forming a virtual dental implant body modeling a dental implant body, the virtual dental implant body including the virtual occlusually-facing prosthesis interface shape modeling a prosthesis interface of the dental implant body to receive an occlusally-facing dental prosthesis component, the virtual occlusually-facing prosthesis interface shape to include a substantially three-dimensionally contoured custom surface shape correlated to a corresponding surface shape of the modeled virtual crown portion, and

forming a virtual occlusally-facing dental prosthesis component modeling an occlusally-facing dental prosthesis component, the step of forming the virtual occlusally-facing dental prosthesis component including forming a complementing virtual dental implant body-receiving surface to define a complementing virtual interface surface modeling a complementing interface surface to receive occlusally-facing portions of the dental implant body, the prosthesis interface and the complementing interface surface to create a form locking fit therebetween,

wherein the step of forming a virtual dental implant body includes;

separating a portion of the at least one three-dimensional virtual model along a virtual bone-facing gum line representation, the separated portion including the modeled virtual root portion to define a virtual root body portion model,

copying at least portions of the modeled virtual crown portion, the copy to include at least portions of the modeled virtual crown portion forming a base shape of the prosthesis interface,

reducing dimensions of the at least portions of the modeled virtual crown portion to define a prosthesis interface model, and

combining the virtual prosthesis interface model with the virtual root body portion model to form the virtual dental implant body;

wherein the step of forming the virtual occlusally-facing dental prosthesis component comprises defining virtual dimensions of an occlusally-facing surface to define a virtual transgingival cap model of a transgingival cap, the dimensions of the transgingival cap model being larger than the dimensions of the virtual prosthesis interface model; and

wherein the method further comprises the step of forming a virtual crown component model modeling a crown component of the dental implant, to include forming a complementing virtual transgingival cap-receiving surface modeling a transgingival cap-receiving surface of the crown component shaped and positioned to receive occlusally-facing portions of the transgingival cap.

2. The method according to claim 1, wherein the step of forming a virtual crown component model includes separating a portion of the at least one three-dimensional virtual model along a virtual outer gum line representation, the separated portion including the modeled virtual crown portion.

3. The method according to claim 1,

wherein the step of receiving and accessing data describing an in-vivo dental anatomy of the specific pre-identified patient associated with the non-functional natural positioned in the jawbone of the specific pre-identified patient and data describing the three-dimensional outer surface shape of least portions of the crown of the non-functional natural tooth and surrounding gum tissue is performed by a computer having memory and having dental implant design program product stored in the memory of the computer;

and

wherein the steps of separating the portion of the at least one three-dimensional virtual model along the virtual outer gum line representation, copying at least portions of the modeled virtual crown portion, reducing dimensions of the at least portions of the modeled virtual crown portion, and combining the virtual prosthesis interface model with the virtual root body portion model to form the virtual dental implant body, and the step of forming the virtual occlusally-facing dental prosthesis component, are performed on a graphical user interface operably coupled to the computer responsive to user manipulation of an input device.

4. The method according to claim 3, wherein the computer is adapted to perform the step of producing a set of digital data virtually defining the three-dimensionally contoured implant body surface shape, and wherein the method further comprises performing one or more of the following steps:

employing a machining process performed by a computer numerical control (CNC) based machining apparatus to form substantial portions of the dental implant body including the prosthesis interface responsive to the set of digital data; and

employing a rapid prototyping process performed by a computer numerical control (CNC) based rapid prototyping apparatus to form substantial portions of the dental implant body including the prosthesis interface responsive to the set of digital data.

5. A method of manufacturing a dental implant to replace a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient, the method comprising the steps of:

receiving and accessing data describing an in-vivo dental anatomy of the specific pre-identified patient associated with the non-functional natural tooth prior to removal from the jawbone of the specific pre-identified patient, the in-vivo dental anatomy to include a three-dimensional outer surface shape of at least portions of a root of the non-functional natural tooth, and a three-dimensional outer surface shape of at least portions of a crown of the non-functional natural tooth and surrounding gum tissue to define received data comprising received in-vivo imaging data;

forming at least one three-dimensional virtual model of at least portions of the non-functional natural tooth positioned in the jawbone of the specific pre-identified patient responsive to at least portions of the received in-vivo imaging data, the at least one three-dimensional virtual model of the non-functional natural tooth including a modeled virtual root portion and a modeled virtual crown portion; and

designing the dental implant based upon the at least one three-dimensional virtual model of at least portions of the non-functional natural tooth, the step of designing the dental implant including the steps of;

deriving a virtual occlusally-facing prosthesis interface shape from a virtual reduction of at least a substantial portion of the modeled virtual crown portion;

forming a virtual dental implant body modeling a dental implant body, the virtual dental implant body including the virtual occlusually-facing prosthesis interface shape modeling a prosthesis interface of the dental implant body to receive an occlusally-facing dental prosthesis component, virtual occlusually-facing prosthesis interface shape to include a substantially three-dimensionally contoured custom surface shape correlated to a corresponding surface shape of the modeled virtual crown portion, and

forming a virtual occlusally-facing dental prosthesis component modeling an occlusally-facing dental prosthesis component, the step of forming the virtual occlusally-facing dental prosthesis component including forming a complementing virtual dental implant body-receiving surface to define a complementing virtual interface surface modeling a complementing interface surface to receive occlusally-facing portions of the dental implant body, the prosthesis interface and the complementing interface surface to create a form locking fit therebetween;

wherein the dental implant body includes a root body section comprising a titanium material, wherein the step of forming a virtual occlusally-facing dental prosthesis component comprises forming a virtual model of a transgingival cap modeling a transgingival cap, wherein the transgingival cap comprises a ceramic material, wherein the implant body includes a root body section, wherein the prosthesis interface includes an outward-facing circumferential edge, and wherein the method further comprises the step of;

connecting the dental implant body with the transgingival cap at the prosthesis interface, the step of connecting performed prior to insertion of the root body section into the jawbone of the specific pre-identified patient; and

wherein the transgingival cap is sized and shaped so that when connected to the dental implant body and when the root body section is inserted into the jawbone of the patient, the outward-facing circumferential edge of the prosthesis interface is substantially below an outer gum line of the specific pre-identified patient surrounding lingual-facing, labial-facing, and proximal-facing surfaces of the non-functional natural tooth as determined prior to extraction thereof from the jawbone of the patient.

6. A method of manufacturing a dental implant to replace a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient, the method comprising the step of:

designing the dental implant based upon at least one virtual model of at least portions of a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient, the at least one three-dimensional virtual model of the non-functional natural tooth including a modeled virtual root portion and a modeled virtual crown portion, the step of designing the dental implant including the steps of;

forming a virtual dental implant body modeling a dental implant body, the virtual dental implant body having a virtual occlusally-facing prosthesis interface modeling a prosthesis interface of the dental implant body to receive an occlusally-facing dental prosthesis component, the step of forming the virtual dental implant body including forming the virtual occlusally-facing prosthesis interface to include a three-dimensionally contoured custom implant interface surface shape derived from a virtually reduced model of a substantial portion of the modeled virtual crown portion, the three-dimensionally contoured custom implant interface surface shape correlated to a corresponding surface shape of the modeled virtual crown portion, and

forming a virtual occlusally-facing dental prosthesis component modeling an occlusally-facing dental prosthesis component, the step of forming the virtual occlusally-facing dental prosthesis component including forming a complementing virtual dental implant body-receiving surface to define a complementing virtual interface surface modeling a complementing interface surface to receive occlusally-facing portions of the dental implant body, the prosthesis interface and the complementing interface surface to create a form locking fit therebetween;

wherein the step of forming the virtual dental implant body includes;

separating a portion of the at least one three-dimensional virtual model along a virtual bone-facing gum line representation, the separated portion including the modeled virtual root portion to define a virtual root body portion model,

copying at least portions of the modeled virtual crown portion, the copy to include at least portions of the modeled virtual crown portion forming a base shape of the prosthesis interface,

reducing dimensions of the at least portions of the modeled virtual crown portion to define a prosthesis interface model, and

combining the virtual prosthesis interface model with the virtual root body portion model to form the virtual dental implant body;

wherein the step of forming the virtual occlusally-facing dental prosthesis component comprises defining virtual dimensions of an occlusally-facing surface to define a virtual transgingival cap model of a transgingival cap, the dimensions of the transgingival cap model being larger than the dimensions of the virtual prosthesis interface model, and

wherein the method further comprises the step of forming a virtual crown component model modeling a crown component of the dental implant, to include forming a complementing virtual transgingival cap-receiving surface modeling a transgingival cap-receiving surface of the crown component shaped and positioned to receive occlusally-facing portions of the transgingival cap.

7. The method according to claim 6, wherein the step of forming a virtual crown component model includes separating a portion of the at least one three-dimensional virtual model along a virtual outer gum line representation, the separated portion including the modeled virtual crown portion.

8. The method according to claim 6, further comprising the step of:

receiving and accessing data describing a dental anatomy associated with the non-functional natural tooth positioned in the jawbone of the specific pre-identified patient to include a three-dimensional outer surface shape of at least portions of a root of the non-functional natural tooth and data describing a three-dimensional outer surface shape of least portions of a crown of the non-functional natural tooth and surrounding gum tissue prior to removal of the non-functional natural tooth from the jawbone of the specific pre-identified patient, to define received data, the step of receiving and accessing data describing a dental anatomy associated with the non-functional natural tooth positioned in the jawbone of the specific pre-identified patient and data describing the three-dimensional outer surface shape of least portions of the crown of the non-functional natural tooth and surrounding gum tissue being performed by a computer having memory and having dental implant design program product stored in the memory; and

wherein the steps of separating the portion of the at least one three-dimensional virtual model along the virtual outer gum line representation, copying at least portions of the modeled virtual crown portion, reducing dimensions of the at least portions of the modeled virtual crown portion, and combining the virtual prosthesis interface model with the virtual root body portion model to form the virtual dental implant body, and the step of forming the virtual occlusally-facing dental prosthesis component, are performed on a graphical user interface operably coupled to the computer responsive to user manipulation of an input device.

9. The method according to claim 8, wherein the computer is adapted to perform the step of producing a set of digital data virtually defining the three-dimensionally contoured implant body surface shape, and wherein the method further comprises performing one or more of the following steps:

employing a machining process performed by a computer numerical control (CNC) based machining apparatus to form substantial portions of the dental implant body including the prosthesis interface responsive to the set of digital data; and

employing a rapid prototyping process performed by a computer numerical control (CNC) based rapid prototyping apparatus to form substantial portions of the dental implant body including the prosthesis interface responsive to the set of digital data.

10. The method according to claim 6, wherein the dental implant body includes a root body section comprising a titanium material, wherein the step of forming a virtual occlusally-facing dental prosthesis component comprises forming a virtual model of a transgingival cap modeling a transgingival cap, wherein the transgingival cap comprises a ceramic material, wherein the implant body includes a root body section, wherein the prosthesis interface includes an outward-facing circumferential edge, and wherein the method further comprises the step of:

connecting the dental implant body with the transgingival cap at the prosthesis interface, the step of connecting performed prior to insertion of the root body section into the jawbone of the specific pre-identified patient; and

wherein the transgingival cap is sized and shaped so that when connected to the dental implant body and when the root body section is inserted into the jawbone of the patient, the outward-facing circumferential edge of the prosthesis interface is substantially below an outer gum line of the specific pre-identified patient surrounding lingual-facing, labial-facing, and proximal-facing surfaces of the non-functional natural tooth as determined prior to extraction thereof from the jawbone of the patient.

11. A method of manufacturing a dental prosthesis to replace a non-functional natural tooth positioned in a jawbone of a specific pre-identified patient, the method comprising the steps of:

receiving and accessing 3D in-vivo imaging data describing an in-vivo dental anatomy of the specific pre-identified patient associated with the non-functional natural tooth prior to its removal from the jawbone of the specific pre-identified patient, the 3D in-vivo imaging data to include 3D in-vivo root imaging data of at least a portion of an in-vivo root of the non-functional natural tooth, and 3D in-vivo occlusal-facing imaging data of at least a portion of an in-vivo occlusal-facing portion of the non-functional natural tooth;

forming a virtual 3D implant component design model at least partially responsive to the 3D in-vivo imaging data; and

manufacturing an implant component at least partially responsive to the virtual 3D implant component design model, the implant component including an implant component root portion and an occlusal-facing implant component interface,

the implant component root portion having a substantially custom-shaped root portion surface of spatial dimension correlating to a corresponding virtual surface of spatial dimension represented in the 3D in-vivo root imaging data, the occlusal-facing implant component interface having a substantially custom-shaped interface surface of spatial dimension correlating to a corresponding virtually reduced model of spatial dimension derived from the 3D in-vivo occlusal-facing imaging data;

wherein the virtual iso-crestal or supra-crestal surface of spatial dimension is represented by one or more of the following;

the 3D in-vivo occlusal-facing imaging data;

3D in-vivo bone imaging data; and

3D in-vivo gum tissue imaging data.

12. The method according to claim 11, wherein the custom-shaped root portion surface of spatial dimension at least partially correlates to a virtual root portion of spatial dimension represented in the 3D in-vivo root imaging data.

13. A method of manufacturing a dental implant, the dental implant having a root portion and an occlusally-facing implant interface to receive an occlusally-facing dental component, the method comprising the steps of:

receiving and accessing first in-vivo imaging data representing a substantial spatial extension of an occlusally-facing anatomy of a pre-identified non-functional natural tooth prior to the natural tooth'"'"'s removal from a jawbone of a specific patient;

receiving and accessing second in-vivo imaging data representing a substantial spatial extension of a root anatomy of the pre-identified non-functional natural tooth prior to its removal from the jawbone of the specific patient;

deriving a first virtual shape model of a substantially custom-shaped spatial extension of the occlusally-facing implant interface from the first in-vivo imaging data such that the first virtual shape model correlates to a corresponding virtual shape of the occlusally-facing anatomy of the pre-identified non-functional natural tooth as represented in the first in-vivo imaging data; and

deriving a second virtual shape model of a substantially custom-shaped spatial extension of the root portion from the second in-vivo imaging data so that the second virtual shape model correlates to a corresponding virtual shape of the root anatomy of the pre-identified non-functional natural tooth as represented in the second in-vivo imaging data.

14. The method according to claim 13, wherein the occlusally-facing dental component is selected from the group consisting of:

an abutment, a crown, and a bridge.

15. The method according to claim 13, wherein the occlusally-facing anatomy is a natural crown of the pre-identified non-functional natural tooth.

16. The method according to claim 13, the method further comprising the steps of:

deriving numerical control data from the first virtual shape model and from the second virtual shape model; and

utilizing a numerically controlled machine to shape the dental implant responsive to the numerical control data so that the substantially custom-shaped spatial extension of the occlusally-facing implant interface correlates to the corresponding virtual surface of the occlusally-facing anatomy of the pre-identified non-functional natural tooth as represented in the first in-vivo imaging data, and such that the substantially custom-shaped spatial extension of the root portion correlates to the corresponding virtual surface of the root anatomy of the pre-identified non-functional natural tooth as represented in the second in-vivo imaging data.

17. The method according to claim 13, wherein the method step of deriving the first virtual shape model comprises the step of:

reducing a virtual shape of the occlusally-facing anatomy of the pre-identified non-functional natural tooth as represented in the first in-vivo imaging data, and

utilizing the reduced virtual shape to derive the first virtual shape model.