Orthopedic cement removal tools and methods
JP7873862B2Inactive Publication Date: 2026-06-15RADLEY SCI LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- RADLEY SCI LTD
- Filing Date
- 2023-12-26
- Publication Date
- 2026-06-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Technical Problem
Existing tools for removing poly(methyl methacrylate) (PMMA) cement during artificial joint revision surgery are inefficient and prone to damaging adjacent bone due to difficulty in directing longitudinal-mode ultrasonic vibrations accurately.
Method used
Development of surgical tools actuated by torsional-mode ultrasonic vibrations, featuring elongated waveguides with planar bodies that concentrate and transmit vibrations to a working head with recessed areas, allowing precise and efficient cement removal.
Benefits of technology
Enables faster and more accurate removal of PMMA cement, minimizing damage to adjacent bone and improving surgical efficiency.
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Smart Images
Figure 0007873862000001 
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Abstract
To provide tools for removing PMMA cement from bone cavities which allow more rapid and accurate cement removal, in particular, tools allowing effective application of torsional-mode ultrasonic vibrations to the cement.SOLUTION: A series of surgical tools 11 has respective operative heads 16 mounted adjacently to a distal end of an elongate waveguide. The operative heads 16 are used to remove PMMA bone cement from within a hollow bone, such as a femur. Torsional-mode ultrasonic vibrations are transmitted along the waveguide 14 to the respective operative heads 16, and the operative heads 16 are applied to the bone cement, softening the bone cement and facilitating removing the bone cement. Elongate radial channels 18 extend across cement-contacting faces of several of the surgical tools, acting to focus and transmit the torsional-mode ultrasonic vibrations into adjacent cement.SELECTED DRAWING: Figure 3A
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