Dentistry tool

US11857391B2 · kind B2 · utility

Assignee

• Nobel Biocare Services AG · CH

Inventors

• Edmund Burke · Niederbuchsiten, CH
• David Sollberger · Glattbrugg, CH
• Silvio Nussbaumer · Zürich, CH
• Stefan Holst · Küsnacht (ZH), CH
• Hans Geiselhoringer · Kloten, CH
• Antony Quarry · Caslano, CH
• Jorg Weitzel · Rielasingen-Worblingen, DE

Key dates

• Filing date: Apr 30, 2021
• Grant date: Jan 2, 2024
• Expiry date: Jan 22, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C3/02
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A drill bit and method for normalizing bone is provided. The drill bit has a non-round drill bit core that is adapted to cut hard bone and to not cut soft bone. The drill bit has a cutting edge which may be positioned within a compression zone of the non-round drill bit core. The rotational speed of the drill bit and the profile of the drill bit core are tuned so that hard bone recovers into a cutting zone defined by the cutting edge while soft bone remains outside of the cutting zone. The insertion torque of the drill bit can be measured to determine when the normalization is adequate.