Surgical instrument for mechanical removal of bone cement, and process for production of shock waves

US6264660A · kind A · utility

Assignee

• Ferton Holding · CH

Inventors

• Joachim Schmidt · Schlangen, DE
• Wolfgang Merkle · Meersburg, DE
• Andreas Menne · Meersburg, DE
• Bernard Simon · Troy, US
• Denis Klopfenstein · Morges, CH

Key dates

• Filing date: Dec 9, 1998
• Grant date: Jul 24, 2001
• Expiry date: Dec 9, 2018

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/3662
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In a surgical instrument for the mechanical removal of bone cement (2), comprising a longitudinal housing (4) with a cylinder (6) in which a piston element can be reciprocated by a drive means (14), wherein the piston element on the distal end (18) of the cylinder (6) exerts an impact on a chisel tool supported axially in the housing (4), it is provided that the piston element (10) comprises a projectile (10) adapted to be accelerated to a high final speed and inducing a shock wave into the chisel tool comprising a metallic shock wave transmission probe (22), the probe tip (26) of the chisel tool transmitting the shock wave to the bone cement (2) at a low movement amplitude of the probe tip (26).