Screw-threaded acetabular component of hip joint prosthesis

Details Screw-threaded acetabular component of hip joint prosthesis Screw-threaded acetabular component of hip joint prosthesis

A - Human Necessities

61

F

3/105

A61F 2/34 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 1320796

43593 CAN 9A Abstract of the Disclosure SCREW-THREADED ACETABULAR COMPONENT OF HIP JOINT PROSTHESIS An acetabular implant of a hip joint prosthesis comprising a metal cup shell (2) having an external self-tapping thread extending around the circumference of the shell. The thread is divided into a plurality of segments (8,10) by a plurality of tapping grooves (16). The thread radius (Ra, Rb, Rc, Rd) of the thread segments (8, 10) progressively decreases from the leading end (12) to the trailing end (14) of a segment (8 or 10). The tapping grooves (16) are preferably arranged in pairs dividing the thread into alternating long (8) and short (10) segments. The construction of the thread reduces the propensity of the implant to jam during insertion.

608554

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