Tools for tracking the gum line and displaying periodontal measurements using intra-oral 3D scans

US10327693B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Alexandra R. Cunliffe · Okabena, US
• Guruprasad Somasundaram · Minneapolis, US
• Benjamin D. Zimmer · Hudson, US
• Steve Lastavich · Windom, US
• Peter See · Berlin, DE
• Kelly L. Stein · New Brighton, US

Key dates

• Filing date: Jul 7, 2017
• Grant date: Jun 25, 2019
• Expiry date: Oct 3, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H50/50
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Methods for tracking gum line changes by comparing digital 3D models of teeth and gingiva taken at different times. The digital 3D models are segmented to digitally identify the teeth from the gingiva, and the segmented digital 3D models are compared to detect gum line changes by determining differences between them relating to the gum line. Gum line changes can also be estimated by comparing one of the digital 3D models with a 3D model having a predicted original location of the gum line. Gum line change maps can be displayed to show the gum line changes determined through the tracking or estimating of changes. The digital 3D models can also be displayed with periodontal measurements placed upon them.