Set of instruments for the implantation of an acetabular prosthesis

Abstract

A set of instruments for the implantation of an acetabular prosthesis ( 100 ), comprises at least one tool ( 1; 2 ) designed to operate in the acetabular cavity ( 101 ) of a patient and at least one emitter ( 3 ) jointly associable with said tool and designed to emit a control signal ( 31 ) to be aligned with a reference signal ( 30 ) which identifies a correct orientation of said tool ( 1; 2 ) relative to the acetabular cavity ( 101 ).

1 . A set of instruments for the implantation of an acetabular prosthesis comprising:
 at least one tool designed to operate in the acetabular cavity of a patient; and   at least one emitter jointly associable with said at least one tool and designed to emit a control signal to be aligned with a reference signal which identifies a correct orientation of said at least one tool relative to the acetabular cavity.   
     
     
         2 . The set of instruments according to  claim 1 , further comprising an acetabular reference guide which is fixable to a bone site of the patient separate from the acetabular cavity and with which a second emitter designed to emit said reference signal can be jointly associated. 
     
     
         3 . The set of instruments according to  claim 2 , further comprising an acetabular calibration guide transitorily associable with the acetabular cavity of the patient according to a desired orientation, said acetabular calibration guide being jointly associable with an emitter designed to emit a calibration signal which identifies the orientation thereof, said reference signal being able to be calibrated relative to said calibration signal. 
     
     
         4 . The set of instruments according to  claim 3 , wherein said acetabular calibration guide comprises a positioning base that precisely mates with the acetabular cavity of the patient. 
     
     
         5 . The set of instruments according to  claim 4 , wherein said positioning base has a supporting foot intended to abut against an internal surface of said acetabular cavity, and a plurality of positioning arms intended to engage with different points on the periphery of said acetabular cavity. 
     
     
         6 . The set of instruments according to  claim 5 , wherein said positioning arms comprise a central positioning arm intended to be inserted in the acetabular fossa. 
     
     
         7 . The set of instruments according to  claim 5 , wherein said positioning arms comprise a lower positioning arm intended to abut against the lower acetabular lip and an upper positioning arm intended to abut against the upper acetabular lip of said acetabular cavity. 
     
     
         8 . The set of instruments according to  claim 3 , wherein the same emitter can be associated alternatively with the different tools and with the acetabular calibration guide. 
     
     
         9 . The set of instruments according to  claim 8 , wherein said emitter is mounted on a connector configured to be snap fitted to adaptors associated with the different tools as well as to an adaptor associated with the acetabular calibration guide. 
     
     
         10 . The set of instruments according to  claim 9 , wherein said second emitter is mounted on a connector configured to be snap fitted to an adaptor associated with the acetabular reference guide, said emitter and said second emitter with respective connectors being interchangeable with each other. 
     
     
         11 . The set of instruments according to  claim 2 , wherein said emitters are optical collimators configured to emit optical signals, two of which can be adjusted with each other overlapping the track of said optical signals projected on a surface plate. 
     
     
         12 . The set of instruments according to  claim 1 , wherein one of said tools comprises an acetabular reamer. 
     
     
         13 . The set of instruments according to  claim 1 , wherein one of said tools comprises an impactor. 
     
     
         14 . The set of instruments according to  claim 1 , wherein said emitter is associated, by a pivotable joint, to a connector configured to be fitted to specific adaptors integral with other components of the set of instruments. 
     
     
         15 . The set of instruments according to  claim 14 , wherein said connector comprises a locking screw designed to selectively block the rotation of the pivotable joint.