Method and system for finding tooth features on a virtual three-dimensional model

US7695278B2 · kind B2 · utility

Assignee

• Ora Metrix, Inc. · US

Inventors

• Peer Sporbert · Berlin, DE
• Hans Imgrund · Berlin, DE
• Markus Kaufmann · Berlin, DE

Key dates

• Filing date: Sep 23, 2005
• Grant date: Apr 13, 2010
• Expiry date: Sep 23, 2025

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C2007/004
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and system are disclosed for finding virtual tooth features on virtual three-dimensional models of the teeth of patients. The tooth features comprise marginal ridges, cusp tips, contact points, central groove and buccal groove. Tooth axes system plays a key role in identifying the tooth features. An iterative method is disclosed for improving the accuracy of the tooth axes system. A virtual three-dimension model preferably obtained by scanning the dentition of a patient forms the basis for determining the tooth features. Tooth features are derived for all categories of teeth including molars, premolars, canines and front teeth. Tooth features are very helpful and used in planning orthodontic treatment. The tooth features are determined automatically using the computerized techniques; and can be manually adjusted when necessary.