Prosthesis installation systems and methods
First Claim
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1. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
- an engine producing a motion;
a shaft coupled to the prosthesis;
a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion;
wherein said converter includes a cam having a cam surface responsive to said rotary motion and wherein said shaft is coupled to said cam surface; and
wherein said converter includes a rocker arm coupled between said cam surface and said shaft with a first end of said rocker arm coupled to said cam surface and a second end of said rocker arm coupled to said shaft and wherein a biasing structure is coupled to said second end.
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Abstract
A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a replacement 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 replacement procedure.
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Citations
8 Claims
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1. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
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an engine producing a motion; a shaft coupled to the prosthesis; a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion; wherein said converter includes a cam having a cam surface responsive to said rotary motion and wherein said shaft is coupled to said cam surface; and wherein said converter includes a rocker arm coupled between said cam surface and said shaft with a first end of said rocker arm coupled to said cam surface and a second end of said rocker arm coupled to said shaft and wherein a biasing structure is coupled to said second end.
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2. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
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an engine producing a motion; a shaft coupled to the prosthesis; a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion; wherein said engine includes a rotary motor and wherein said motion includes a rotary motion; wherein said converter includes a cam having a cam surface responsive to said rotary motion and wherein said shaft is coupled to said cam surface; and wherein said converter includes a rocker arm coupled between said cam surface and said shaft with a first end of said rocker arm coupled to said cam surface and a second end of said rocker arm coupled to said shaft and wherein a biasing structure is coupled to said second end.
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3. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
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an engine producing a motion; a shaft coupled to the prosthesis; a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion; wherein said engine includes a pneumatic motor and wherein said motion includes a flow of a fluid; wherein said converter includes a cam having a cam surface responsive to said flow and wherein said shaft is coupled to said cam surface; wherein said converter includes a rocker arm coupled between said cam surface and said shaft with a first end of said rocker arm coupled to said cam surface and a second end of said rocker arm coupled to said shaft and wherein a biasing structure is coupled to said second end.
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4. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
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an engine producing a motion; a shaft coupled to the prosthesis; a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion; wherein said engine includes a rotary motor and wherein said motion includes a rotary motion; wherein said converter includes a cam having a cam surface responsive to said rotary motion and wherein said shaft is coupled to said cam surface; wherein said rotary motor includes a direct current (DC) motor, wherein said cam surface defines a two lobed surface directly connected to said DC motor by a gear train; wherein said gear train is configured to produce said series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion at about 50 Hz; wherein said shaft includes a distal end coupled to the prosthesis and a proximal end proximate said cam surface and wherein said proximal end is coupled to an inline spring to bias said proximal end away from said cam surface, and wherein a compression of said inline spring is configured to contact said proximal end to said cam surface.
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5. A vibratory device for installation of a prosthesis into a cavity prepared in a portion of a bone, comprising:
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an engine producing a motion; a shaft coupled to the prosthesis; a converter, coupled to said engine and to said shaft, producing a series of longitudinal vibrations in said shaft and the prosthesis responsive to said motion; wherein said engine includes a rotary motor and wherein said motion includes a rotary motion; and wherein said converter includes a cam having a cam surface responsive to said rotary motion with said cam surface coupled to a shaft spring by a rocker assembly, further comprising a gear train coupled to said cam, and wherein said shaft spring is coupled to said shaft. - View Dependent Claims (6, 7, 8)
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Specification