# US 2025/0375271 A1 · Multimodal intraoral scanning systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0375271 A1 - Document ID: US20250375271A1 - Status: Published application - Kind: A1 - Application number: 19/301,633 - Filed: 2025-08-15 - Published: 2025-12-11 - Earliest claimed: 2021-07-21 - Assignees: Align Technology, Inc. - Applicants: Align Technology, Inc. - Inventors: Yossef ATIYA; Maayan MOSHE - Web page: https://patentgrep.com/patent/US20250375271A1 ## CPC - A61C 9/0053: {Optical means or methods, e.g. scanning the teeth by a laser or light beam} - A61C 9/006: {projecting one or more stripes or patterns on the teeth} - A61B 1/00096: {Optical elements} - A61B 1/00172: {with means for scanning} - A61B 1/00194: {adapted for three-dimensional imaging} - A61B 1/042: {characterised by a proximal camera, e.g. a CCD camera} - A61B 1/0605: {for spatially modulated illumination} - A61B 1/0669: {at proximal end of an endoscope} - A61B 1/0684: {using light emitting diodes [LED]} - A61B 1/247: with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors - A61B 5/0066: {Optical coherence imaging} - A61B 5/0088: {for oral or dental tissue} - A61C 7/002: {Orthodontic computer assisted systems} - A61C 13/34: Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4] - A61C 13/0004: {Computer-assisted sizing or machining of dental prostheses} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A multimodal scanning system may include a scanning wand. The wand may include a probe, a 3D surface scanner configured generate 3D surface data of the intraoral structure, and an OCT scanning system configured generate volumetric scan data. The system may also include a processor and memory comprising instructions that when executed cause the system to perform a method including generating 3D surface scan data of an intraoral structure, generating volumetric scan data of the internal structure with the OCT scanning system, determining a location and orientation of the intraoral scanning wand based on the 3D surface data, generating a three-dimensional volumetric model of a dentition based on the volumetric scan data and the 3D surface scan data, and generating a dental treatment plan based on a three-dimensional volumetric model of the dentition. ## Claims ### Claim 1 A multimodal scanning system for scanning an intraoral structure, the system comprising: an intraoral scanning wand having a distal end and a proximal end and comprising: a probe located at a distal end of the wand, a 3D surface scanner configured to project light out of a distal end of the probe and generate 3D surface data of the intraoral structure, and an OCT scanning system configured to project light out of the distal end of the probe and generate volumetric scan data; and a processor and memory comprising instructions that when executed cause the system to perform a method comprising: generating 3D surface scan data of an intraoral structure; generating volumetric scan data of the intraoral structure with the OCT scanning system; determining a location and orientation of the intraoral scanning wand with respect to the intraoral structure based on the 3D surface data of the intraoral structure, aligning the volumetric scan data with the 3D surface scan data based on the determined location and orientation; generating a three-dimensional volumetric model of a dentition based on the aligned and corrected volumetric scan data and the 3D surface scan data; and generating a dental treatment plan based on the three-dimensional volumetric model of the dentition. ### Claim 2 (depends on 1) The multimodal scanning system of claim 1, wherein the method further comprises generating lesion data based on the three-dimensional volumetric model of the dentition before generating the dental treatment plan. ### Claim 3 (depends on 2) The multimodal scanning system of claim 2, wherein the 3D surface scanner is a structured light projector and wherein structured light projector and the OCT scanning system are in a known orientation with respect to each other within the intraoral scanning wand. ### Claim 4 (depends on 1) The multimodal scanning system of claim 1, wherein the 3D surface scanner and the OCT scanning system are coaxial with respect to each other. ### Claim 5 (depends on 4) The multimodal scanning system of claim 4, further comprising an imaging sensor. ### Claim 6 (depends on 5) The multimodal scanning system of claim 5, wherein the imaging sensor is configured to capture structured light reflected from external surfaces of the intraoral structure and OCT light reflected from an internal structure of the intraoral structure. ### Claim 7 (depends on 5) The multimodal scanning system of claim 5, wherein the method further comprises generating a three-dimensional volumetric model of an intraoral object based on data generated by the 3D surface scanner and the OCT scanning system. ### Claim 8 (depends on 2) The multimodal scanning system of claim 2, wherein generating lesion data based on the three-dimensional volumetric model of the dentition of the patient includes using a machine learning algorithm trained on tagged three-dimensional volumetric models to determine the location of and classify a lesion within the lesion data. ### Claim 9 (depends on 8) The multimodal scanning system of claim 8, wherein the method further comprises providing diagnostic indicators on the three-dimensional volumetric model based on the location and classification of the lesion. ### Claim 10 (depends on 9) The multimodal scanning system of claim 9, wherein the lesion is one or more of caries, oral cancer, or periodontal disease. ### Claim 11 (depends on 1) The multimodal scanning system of claim 1, wherein the method further comprises: determining data of a shape of subgingival hard tissue from the volumetric scan data, and wherein the dental treatment plan is an orthodontic treatment plan based on the 3D surface scan data and the subgingival hard tissue. ### Claim 12 (depends on 11) The multimodal scanning system of claim 11, wherein the method further comprises combining the 3D surface scan data with data of the shape of the subgingival hard tissue. ### Claim 13 (depends on 12) The multimodal scanning system of claim 12, wherein the subgingival hard tissue is tooth roots and the 3D includes tooth crowns. ### Claim 14 (depends on 12) The multimodal scanning system of claim 12, wherein combining the combining the 3D surface scan data with data of the shape of the subgingival hard tissue includes generating a shape of one or more teeth based on the combining. ### Claim 15 (depends on 11) The multimodal scanning system of claim 11, wherein the method further comprises: aligning the volumetric scan data with the 3D surface scan data, and correcting the volumetric scan data for diffraction effects based on a position of the wand with respect to the intraoral structure. ### Claim 16 (depends on 1) The multimodal scanning system of claim 1, wherein the method further comprises determining data of a shape of subgingival hard tissue from the volumetric scan data, and wherein the dental treatment plan is a restorative treatment plan based on the 3D surface scan data and the subgingival hard tissue. ### Claim 17 (depends on 16) The multimodal scanning system of claim 16, wherein the method further comprises combining the 3D surface scan data with data of the shape of the subgingival hard tissue. ### Claim 18 (depends on 17) The multimodal scanning system of claim 17, wherein the subgingival hard tissue includes a margin line of a prepared tooth and the 3D surface scan data includes a prepared tooth crown. ### Claim 19 (depends on 18) The multimodal scanning system of claim 18, wherein the method further comprises generating a prosthetic based on the combined surface scan data and the subgingival hard tissue. ### Claim 20 (depends on 2) The multimodal scanning system of claim 2, the dental treatment plan is a restorative treatment plan based on the 3D surface scan data and the lesion data.