Patent · US Expired

Implantable prosthesis

US5222983A · kind A · utility

47Cited by

5References

9Claims

0Family size

Assignee

Thera Patent GmbH & Co. KG · DE

Inventors

Hermann Schmitz
Wolf-Dietrich Herold · Hechendorf, DE
Werner Zoellner · Herrsching am Ammersee, DE

Key dates

Filing date	Sep 13, 1991
Grant date	Jun 29, 1993
Priority date	—
Expiry date	Sep 13, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2310/00023
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The shaft surface of a cementlessly implantable prosthesis is provided with a large number of holes which are formed as blind or pocket holes. Each hole is surrounded by a bulb in the form of a crater edge. The bony tissue that grows into the holes and around the bulbs ensures a firm seating of the prosthesis over a long time. The holes are preferably oriented in such a way that the bone pegs that extend into them can take up a desired load which may be either a compressive or a tensile force. A tensile force exerted on the bone will stimulate its growth.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.