Ceramtec Gmbh

Cerasiv Gmbh Innovatives Keramik-Engineering

Ralph Autenrieth

Hans-Georg Pfaff

Roman Preuss

Tobias Weiss

Michael Kuntz

Götz Griesmayr

Herbert Richter

Gerd Willmann

Manuela Muhr-Schenk

Martin Wimmer

Christian Worne

An insertion instrument for hip endoprosthetics for inserting socket inserts into endoprosthetic hip sockets having holding claws which are connected to a substantially ring-shaped support element through spring elements, wherein the insertion instrument can be placed on the socket insert and can be connected to said socket insert through the holding claws. In order for the user to receive direct palpatory information about the events in the operation areas and to not suffer a perceived loss of control, it is proposed that the support element surround a freely accessible, substantially circular effective insertion area, the center point of which is located on the longitudinal axis of the insertion instrument.

Insertion instrument for inserting socket inserts into the spherical recesses of hip sockets

A ceramic socket or ceramic socket insert for a hip joint prosthesis is tested prior to implantation in a human body by subjecting the portions of the interior of the socket or socket insert to a load that generates stresses that are greater than the physiological load. This may be accomplished either by pressing a hemispherically-shaped deformable material such as polymer or plastic into the interior of the socket or socket insert or by exposing the interior of the socket or socket insert to a fluid under pressure. The interior of the socket or socket insert may be sealed off with a test punch that has a supply line for the fluid. To reduce the amount of fluid that is required, the test punch may have a bulge that projects into the interior of the socket or socket insert and leaves only a gap for the fluid. In the method of testing, the interior of the socket or socket insert is subjected to a load that generates stress such that a defective socket or socket insert is destroyed and a non-defective socket or socket insert survives unharmed.

Method of testing ceramic cotyloid cavities for hip joint endoprostheses

Growing community of inventors

Esslingen, Germany

Ralph Autenrieth