Vertebral surgery instrument

Patent metadata

Field	Value
Publication number	US-10130398-B2
Application number	US-201515329740-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Sep 18, 2014
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A vertebral surgery instrument includes: an engagement part for engaging with a pair of opposing parts provided on or attached to a vertebral implant in a state in which the vertebral implant is fixed to a vertebra, the pair of opposing parts forming a slit into which a fixation rod for fixing a plurality of vertebrae to each other is to be inserted; and a pair of guide parts that are provided integrally with or attached to the engagement part. The pair of guide parts are formed extending so as to separate from each other toward a side on which the fixation rod is to be inserted, in a state in which the engagement part is engaged with the pair of opposing parts, and the slit and a guide passage that is formed between the pair of guide parts are in communication with each other.

First claim

The invention claimed is:

1. A vertebral surgery instrument comprising:
a body part comprising:
an engagement portion having a first engagement part and a second engagement part, the engagement portion configured to engage with a pair of opposing parts attached to a vertebral implant in a state in which the vertebral implant is fixed to a vertebra, the pair of opposing parts forming a slit into which a fixation rod for fixing a plurality of vertebrae to each other is to be inserted; and
a pair of guide parts that are provided integrally with or attached to the engagement portion and extend in an up-down direction,

wherein the first engagement part is provided on an upper portion of the body part and is configured to engage an upper portion of the pair of opposing parts, and the second engagement part is provided on a lower portion of the body part and is configured to engage a lower portion of the pair of opposing parts,
wherein each of the pair of guide parts are formed in a plate shape extending a first distance from an outer surface of the engagement portion in a rear-front direction perpendicular to the up-down direction and extending a second distance, in a left right direction perpendicular to the up-down direction and the rear-front direction, less than the first distance, the pair of guide parts extending so as to separate from each other toward a side on which the fixation rod is to be inserted, in a state in which the engagement portion is engaged with the pair of opposing parts, and the slit and a guide passage that is formed between the pair of guide parts are in communication with each other, and
the second engagement part is provided at a location which corresponds to the pair of guide parts in the up-down direction.

2. The vertebral surgery instrument according to claim 1 ,
wherein the engagement portion is configured to engage with outer portions of the pair of opposing parts.

3. The vertebral surgery instrument according to claim 1 ,
wherein the engagement portion is configured to engage with inner portions of the pair of opposing parts.

4. The vertebral surgery instrument according to claim 1 ,
wherein an opening is formed in a portion on a side opposite to the vertebral implant fixed to the vertebra, in the state in which the engagement portion is engaged with the pair of opposing parts.

5. The vertebral surgery instrument according to claim 4 , further comprising:
a grip part that extends obliquely to a direction in which the opening is open.

6. The vertebral surgery instrument according to claim 1 ,
wherein the pair of guide parts are tapered toward the vertebral implant in the state in which the engagement portion is engaged with the pair of opposing parts.

7. The vertebral surgery instrument according to claim 1 , further comprising:
a cap part for externally covering end portions of the pair of opposing parts that are on a side opposite to the vertebral implant so as to restrict the pair of opposing parts from approaching each other or separating from each other.

8. The vertebral surgery instrument according to claim 7 ,
wherein the cap part is provided as the first engagement part.

Assignees

• Kyocera Medical Corp
• Ishii Ken
• Matsumoto Morio
• Toyama Yoshiaki
• Kyocera Corp

Inventors

• Ishii Ken
• Matsumoto Morio
• Toyama Yoshiaki
• Atarashi Masaki
• Ito Junji

Classifications

• A61B17/7082 Primary

  for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws · CPC title

• A61B17/7086

  Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers · CPC title

• A61B17/86

  Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)} · CPC title

• A61B17/7077

  for moving bone anchors attached to vertebrae, thereby displacing the vertebrae · CPC title

• A61B17/8875

  Screwdrivers, spanners or wrenches · CPC title