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Device and method for the in-situ production of articulating spacers

A joint spacer, in-situ technology, applied in elbow joints, knee joints, joint implants, etc., can solve the problems of air inclusion damage, harmful sliding characteristics of joint spacers, complex mold structure, etc., and achieve low cost. Effect

Active Publication Date: 2014-11-26
HERAEUS MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the disadvantage of this molding system is that the trapped air cannot escape, and these air inclusions at the joint surface and / or the sliding surface of the joint spacer can cause damage and thus damage the joint spacer. Sliding properties causing harmful effects
In addition, the structure of the mold is complex

Method used

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  • Device and method for the in-situ production of articulating spacers
  • Device and method for the in-situ production of articulating spacers
  • Device and method for the in-situ production of articulating spacers

Examples

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Embodiment Construction

[0080] figure 1 A schematic perspective view showing a femoral die made of thermoplastic material according to the invention. exist figure 1 In the view shown, the femoral die comprises an upwardly facing die surface 1 for forming an articular surface in bone cement (not shown), thereby placing the bone cement on the prepared end of the femur. For this purpose, bone cement is attached to the contact surface on the femur. When the raw components of the bone cement react with each other, the bone cement first becomes doughy, ie more viscous. In this condition, the die surface 1 of the femoral die is pressed against the bone cement. The fully cured bone cement later forms the femoral joint spacer and replicates at least the condyles of the femur.

[0081] The thickness of the bone cement and of the spacer later formed therefrom is determined by the height of the two separators 2 arranged on the mid-plane of the femoral die. The flat end of the separator 2 serves as a contact...

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Abstract

Devices and methods in-situ produce articular spacers from a bone cement. The devices and methods have a punch surface for forming an articulation surface of a spacer in the bone cement, whereby the bone cement is arranged on a bone surface for fixation of the spacer, whereby the punch surface has a negative image of the articulation surface to be produced, and the surface forming the negative image is open on the side, at least in part, such that the bone cement can be pushed towards the side, away from the articulation surface to be formed. Moreover, the method for producing an articular spacer on a bone may have one or more of the following steps: A) Applying a bone cement to a prepared bone; B) Pressing said device onto the bone cement; and C) Detaching the device from the cured bone cement.

Description

technical field [0001] The present invention relates to a device for in situ fabrication of a joint spacer with bone cement, the device comprising a die surface for forming the articular surface of the spacer in the bone cement, wherein the bone cement is placed on the bone surface for securing the spacer , the die surface comprises a negative image of the articular surface to be fabricated. The invention also relates to a device comprising two of said devices, the use of said devices, and a method of using said devices to make a joint spacer on bone. This unit is great for (especially) making knee spacers. Background technique [0002] During surgery with PMMA bone cement dough (polymethyl methacrylate bone cement dough) and the device according to the invention, the device is formed in situ on the proximal tibia and distal femur The fabricated knee spacer does not require any separate steps of fabricating the knee spacer component and subsequent anchoring steps on the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38B29C33/44
CPCA61F2002/30672A61F2310/00353A61F2/30942A61B17/8811A61F2/389A61F2/3859A61F2/38A61F2002/30677A61F2002/30957B29C33/42B29C33/424
Inventor 塞巴斯蒂安·福格特
Owner HERAEUS MEDICAL
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