Turning process on a program-controlled lathe, use of this process for making special threads on a screwable glenoid cavity of artificial hip joint and the hip joint glenoid cavity per se

摘要

The workpiece is rotated in the lathe spindle casing and crosscutting is carried out using a cutting tool synchronized with the spindle angle. Programming of the lathe is carried out in steps by combining commands for alternating values for diameter, length and/or feed. Independent claims are also included for (a) the use of this process for cutting special threading into screw-fit artificial hip joint sockets, and (b) specially threaded screw-fit artificial hip joints made using this turning process.