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Bone Plate

a bone screw and bone screw technology, applied in the field of bone plates, can solve problems such as high stress, and achieve the effect of avoiding any undesirable effect on the compression ability of the non-threaded portion and increasing the angulation of the bone screw

Inactive Publication Date: 2011-12-01
DEPUY SYNTHES PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a bone plate that can be used for both rigid and flexible osteosynthesis without compromising its ability for either type of osteosynthesis. The bone plate has a unique design that allows for a threaded portion in the bone plate that can be used to fix bone screws at a predetermined angle. This feature is especially useful when using self-drilling screws. The bone plate also has elongated holes that allow for compression of bone fragments and can include a concave recess to accommodate the spherical head of a bone screw. The design of the bone plate allows for increased stability and strength, and can be used as an internal fixative or a compression plate, depending on the needs of the patient.

Problems solved by technology

Use in this configuration, however, creates high stresses at the interface of the bone plate and screw head because the plate is not forced against the bone, and therefore, the bone fracture is fixed primarily by friction between the plate and the bone.

Method used

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Embodiment Construction

[0025]One embodiment of a bone plate according to the present invention is shown in FIG. 1. The bone plate includes an upper surface 1, a bone-contacting surface 2, and defines a longitudinal axis 3. The bone plate further includes two holes 4A and 4B, which are generally located along the longitudinal axis 3, and extend through the bone plate from upper surface 1 to bone-contacting surface 2. Holes 4A and 4B are dimensioned and configured to receive the heads of bone screws. As shown in FIG. 1, arrow 7 indicates a longitudinal direction toward one end of the bone plate and arrow 8 indicates a longitudinal direction toward a central portion of the bone plate.

[0026]Still referring to FIG. 1, hole 4A, which is located closer to the central portion of the bone plate, is elongated along the longitudinal axis 3 of the bone plate. More specifically, hole 4A defines first and second dimensions on bone-contacting surface 2. First dimension DL is substantially parallel to longitudinal axis 3...

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Abstract

A bone plate includes an upper surface, a bone contacting surface, and at least one hole extending through the upper and bone contacting surfaces. The bone plate defines a longitudinal axis. The at least one hole defines a central axis and is elongated in a direction substantially aligned with the longitudinal axis. The hole may include a threaded portion and a non-threaded portion, and the threaded portion may extend through an angle of between about 190° and about 280° with respect to the central axis.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. patent application Ser. No. 09 / 946,974, which is a continuation-in-part of the U.S. National Stage designation of International Patent Application PCT / CH99 / 00106, filed Mar. 9, 1999 and the U.S. National Stage designation of International Patent Application PCT / CH99 / 00107, also filed Mar. 9, 1999. The entire content of both of these applications is expressly incorporated herein by reference thereto.FIELD OF THE INVENTION[0002]The present invention relates generally to devices for fixation of parts of a fractured bone and more specifically, to bone plates and systems for stabilization and / or compression of parts of a fractured bone.BACKGROUND OF THE INVENTION[0003]Bone plates may generally be utilized to carry out two different types of osteosynthesis, namely “rigid osteosynthesis” and “flexible osteosynthesis.” Rigid osteosynthesis is used for medical care of joint fractures, simple shaft ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/80A61B17/58
CPCA61B17/8057A61B17/8014
Inventor WAGNER, MICHAELFRIGG, ROBERTSCHAVAN, ROBERT
Owner DEPUY SYNTHES PROD INC
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