US 11,717,236 B2
Intraoral coordinate system of dentition for the design and placement of dental implants
Darren Littlefair, Homebush (AU)
Assigned to Jessi Lew Pty Ltd, Homebush (AU)
Appl. No. 17/597,615
Filed by Jessi Lew Pty Ltd, Homebush (AU)
PCT Filed Jul. 31, 2020, PCT No. PCT/IB2020/057284
§ 371(c)(1), (2) Date Jan. 13, 2022,
PCT Pub. No. WO2021/019516, PCT Pub. Date Feb. 4, 2021.
Claims priority of provisional application 62/880,962, filed on Jul. 31, 2019.
Prior Publication US 2022/0202377 A1, Jun. 30, 2022
Int. Cl. A61B 6/00 (2006.01); A61B 6/03 (2006.01); A61B 90/00 (2016.01); G16H 30/40 (2018.01); A61B 6/12 (2006.01); A61B 6/14 (2006.01); A61C 7/00 (2006.01); A61C 9/00 (2006.01); A61C 13/00 (2006.01); A61B 34/10 (2016.01); A61C 1/08 (2006.01)
CPC A61B 6/032 (2013.01) [A61B 6/12 (2013.01); A61B 6/145 (2013.01); A61B 6/4085 (2013.01); A61B 6/425 (2013.01); A61B 6/4233 (2013.01); A61B 6/5211 (2013.01); A61B 6/587 (2013.01); A61B 90/39 (2016.02); A61C 7/002 (2013.01); A61C 9/0046 (2013.01); A61C 9/0053 (2013.01); A61C 13/0004 (2013.01); G16H 30/40 (2018.01); A61B 6/501 (2013.01); A61B 2034/105 (2016.02); A61B 2090/3966 (2016.02); A61C 1/084 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for the planning of the placement of dental implants in the oral cavity using a radiographic Dental Cone Beam Computer Tomography (CBCT) workspace radiographic template coordinate system and a prosthetic CAD workspace, the method comprising
a. establishing a radiographic CBCT workspace having a Cartesian coordinate system in the oral cavity of a patient by
i. placing a radiographic template having at least three radiopaque radiographic markers of predetermined shape, and size, wherein the radiographic template has a predetermined geometry, and wherein the radiographic template is placed in the oral cavity, and mapped to at least one natural or artificial anatomical feature in the oral cavity;
ii. taking a single CBCT scan of the oral cavity of the patient with the radiographic template in the oral cavity and mapped to at least one natural or artificial anatomical feature in the oral cavity; and
iii. establishing a radiographic CBCT workspace having a CBCT coordinate system by identifying the radiographic markers with the CBCT scan data and determining the position of the markers;
b. establishing a prosthetic CAD workspace having a CAD coordinate system from the predetermined location and geometry of the radiographic markers on the radiographic template, and importing the prosthetic CAD workspace into Implant Planning Software; and
c. mapping the prosthetic CAD workspace to the radiographic CBCT workspace or vice-versa by marker segmentation to establish a direct relationship with a mathematical transformation and the mapped workspace for the planning and placement of dental implants in the oral cavity.