Prosthesis revision systems and methods

• US 10,470,897 B2
• Filed: 08/11/2016
• Issued: 11/12/2019
• Est. Priority Date: 12/29/2013
• Status: Active Grant

• Current Assignee: Kambiz Behzadi
• Original Assignee: Kambiz Behzadi
• Inventors: Behzadi, Kambiz
• Primary Examiner(s): Boles, Sameh R
• Application Number:
  US15/235,086
• Publication Number:
  US 20170065428A1
• Time in Patent Office: 1,188 Days
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2002/4666 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2002/4694 pneumatic

Abstract

A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a revision procedure as compared to a more experienced surgeon who performs a greater number of procedures, to provide an improved likelihood of a favorable outcome approaching, if not exceeding, a likelihood of a favorable outcome as performed by a very experienced surgeon with the revision procedure. An engine is operable in two distinctive selectable modes including a unidirectional mode providing only extractive forces and a bidirectional mode providing both extractive and insertional forces.

Claims

1. An extraction device for a prosthesis disposed in a bone having an exposed portion, comprising:

a controller including a trigger;

a support having a proximal end and a distal end opposite of said proximal end, said support further having a longitudinal axis extending from said proximal end to said distal end with said proximal end coupled to said controller, said support further having an adapter coupled to said distal end with said adapter configured to engage the exposed portion of the prosthesis; and

an oscillator coupled to said controller and to said support, said oscillator configured to control a series of vibratory pulses having an oscillation frequency and an oscillation magnitude of said support with said oscillation frequency and said oscillation magnitude configured to extract the prosthesis responsive to said series of vibratory pulses without impact forces;

wherein said engine is operable in two distinctive selectable modes including a unidirectional mode providing only extractive forces and a bidirectional mode providing both extractive and insertional forces.

2. The extraction device of claim 1 wherein said series of vibratory pulses includes a vibratory motion having a frequency greater than or equal to about 20 kHz.

3. The extraction device of claim 1 further comprising a mechanical frame having a C-portion, said mechanical frame including said adaptor wherein said C-portion includes a pair of lateral legs coupled to opposing ends of a longitudinal leg with said longitudinal leg generally parallel to an extraction axis of the prosthesis, wherein one of said lateral legs includes an inner surface including an extraction coupler mechanically communicated to said oscillator.

4. An extraction system for a prosthesis installed and bonded into a portion of bone, the prosthesis including an exposed portion, comprising:

an oscillation engine including a controller coupled to a vibratory machine generating an original series of pulses having a generation pattern, said generation pattern defining a first duty cycle of said original series of pulses; and

a pulse transfer assembly having a proximal end coupled to said oscillation engine and a distal end, spaced from said proximal end, coupled to the prosthesis with said pulse transfer assembly including a connector system at said proximal end, said connector system configured to secure the exposed portion of the prosthesis producing a secured prosthesis with said pulse transfer assembly communicating an extraction series of pulses, responsive to said original series of pulses, to said secured prosthesis producing an applied series of ultrasonic pulses responsive to said extraction series of pulses;

wherein said applied series of ultrasonic pulses are configured to impart a vibratory motion to said secured prosthesis enabling an extraction of said secured prosthesis from the portion of bone

wherein said engine is operable in two distinctive selectable modes including a unidirectional mode providing only extractive forces and a bidirectional mode providing both extractive and insertional forces.

5. The extraction system of claim 4 wherein said pulse transfer assembly receives said original series of pulses from said oscillation engine and produces, responsive to said original series of pulses, an extraction series of pulses having an extraction pattern, said extraction pattern defining a second duty cycle of said extraction series of pulses including a second pulse amplitude, a second pulse direction, a second pulse duration, and a second pulse time window with said pulse transfer assembly communicating said extraction series of pulses to said secured prosthesis producing said applied series of ultrasonic pulses responsive to said extraction series of pulses.

6. The extraction system of claim 5 wherein said pulse transfer assembly includes a body and an elongate vibration assembly having a proximal end and a distal end opposite of said proximal end, said proximal disposed within said body and coupled to said oscillation engine with said distal end extending outside said body and including said connector system;

said elongate vibration assembly configured to move relative to said body and having one or more degrees of freedom.

7. The extraction system of claim 4 wherein said pulse transfer assembly includes a body and an elongate vibration assembly having a proximal end and a distal end opposite of said proximal end, said proximal disposed within said body and coupled to said oscillation engine with said distal end extending outside said body and including said connector system;

said elongate vibration assembly configured to move relative to said body and having one or more degrees of freedom.

8. An apparatus for extracting a bonded implant from a live bone of a patient, the prosthesis having an exposed portion, wherein non-vibratory revision forces for removing the bonded prosthesis from the live bone are in a first range, comprising:

means for vibrating the bonded implant to produce a vibrating bonded implant having a predetermined vibration pattern including an oscillation; and

means for extracting the vibrating bonded implant from the live bone using vibratory extraction forces in a second range, said second range including a set of values less than a lowest value of the first range;

wherein said means for vibrating is operable in two distinctive selectable modes including a unidirectional mode providing only extractive forces and a bidirectional mode providing both extractive and insertional forces.