Apparatus for implantation and extraction of osteal prostheses
First Claim
1. An adaptor for connecting an ultrasonic device to a prosthesis including a lower portion and a ball having a given diameter at an exposed end thereof, said adaptor comprising:
- a base portion having an external circumference, said base portion being provided with a first recess having a diameter closely matching the diameter of the ball, said external circumference of said base portion being provided with at least a second recess to provide clearance for the lower portion of the prosthesis;
a plurality of cap screws provided in corresponding apertures in said base portion for causing a high compression interface between an upper portion of the ball of the prosthesis and an internal surface of said first recess, a face of each of said cap screws contacting the lower edge of the ball at a point below a mid-point of the diameter of the ball; and
a connector coupled to said base portion and adapted to connect said adapter to the ultrasonic device.
5 Assignments
0 Petitions
Accused Products
Abstract
Apparatus particularly suited for implantation and/or extraction of osteal prostheses, comprising an ultrasonic power generator, regulator means for regulating the ultrasonic power generator in accordance with a predetermined algorithm, at least one transducer connected to the output line for converting said electrical energy to a linear mechanical motion, an acoustic transformer for increasing or decreasing peak-to-peak motion of the transducer and means for connecting the acoustic transformer to a surgical tool or a prosthetic device. The system suitably comprises a pair of transducers, one operating at each of 20 KHz and 40 KHz frequencies. Novel adapters for the four major types of osteal prosthesis are also provided.
51 Citations
30 Claims
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1. An adaptor for connecting an ultrasonic device to a prosthesis including a lower portion and a ball having a given diameter at an exposed end thereof, said adaptor comprising:
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a base portion having an external circumference, said base portion being provided with a first recess having a diameter closely matching the diameter of the ball, said external circumference of said base portion being provided with at least a second recess to provide clearance for the lower portion of the prosthesis; a plurality of cap screws provided in corresponding apertures in said base portion for causing a high compression interface between an upper portion of the ball of the prosthesis and an internal surface of said first recess, a face of each of said cap screws contacting the lower edge of the ball at a point below a mid-point of the diameter of the ball; and a connector coupled to said base portion and adapted to connect said adapter to the ultrasonic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An adaptor for connecting an ultrasonic device with a prosthesis, including an upper portion and a lower portion, the prosthesis further including a tapered protrusion extending from an upper surface of the prosthesis, the prosthesis upper portion defining an aperture extending through the prosthesis directly below the upper surface and substantially perpendicular to a longitudinal axis of the lower portion, said adaptor comprising:
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a base portion provided with a recess, said recess including a first portion configured to provide clearance for the tapered protrusion and a second portion formed to provide a high compression fit between said adaptor and the upper portion of the prosthesis in proximity to the aperture, said second portion further defining a pair of opposing apertures corresponding to the aperture in the prosthesis; means for engaging said opposing apertures in said base portion and the aperture in the prosthesis; and a connector coupled to said base portion and adapted to connect said adaptor to the ultrasonic device. - View Dependent Claims (12, 13, 14, 15)
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16. An adapter for connecting an ultrasonic device with a prosthesis including an aperture extending into the prosthesis from an upper surface, the aperture being positioned generally parallel with a longitudinal axis of the prosthesis, the prosthesis also including a tapered protrusion extending from the upper surface of the prosthesis, said adapter comprising:
a generally cylindrical body having a first end provided with a first aperture, said first end of said body being profiled so as to provide clearance for the prosthesis tapered protrusion, and a second end provided with a second aperture adapted for connection with the ultrasonic device, said body further being provided on an external surface thereof with a pair of opposing flat indentation surfaces to facilitate a tool to engage said body. - View Dependent Claims (17, 18)
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19. An adaptor for connecting an ultrasonic device with a prosthesis, including a tapered protrusion projecting from an upper surface thereof at an angle of inclination deviating from a longitudinal axis of the prosthesis, said adaptor comprising:
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a base portion provided with an offset throughhole at an angle corresponding to the angle of inclination of the tapered protrusion, said base portion being further provided with a plurality of apertures surrounding said throughhole; a fastener inserted into said aperture for securing the tapered protrusion in said throughhole; and a connector coupled to said base portion and adapted to connect said adaptor to the ultrasonic device. - View Dependent Claims (20, 21, 22)
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23. An adaptor for connecting an ultrasonic device to a prosthesis, including a ball having a given diameter at an exposed end thereof and a connecting portion intermediate of said ball and a lower portion of said prosthesis, said adaptor comprising:
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a base portion having an external circumference, said base portion being provided with a recess having a diameter greater than the diameter of the ball; a split nut comprising a bottom portion with a half cup matching the diameter of the ball and a top portion substantially mirroring said bottom portion, said top portion having a half cup which substantially matches the diameter of the ball, said split nut configured to insert into said recess of said base portion and to engage the base portion, said bottom and top portions of said split nut being provided with corresponding apertures therethrough; fasteners inserted into said corresponding apertures of said bottom and top portions of said split nut to ensure alignment; and a connector coupled to said base portion and adapted to connect said adaptor to the ultrasonic device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification