Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
1999-01-15
2001-01-09
Buiz, Michael (Department: 3731)
Surgery
Instruments
Orthopedic instrumentation
C606S092000
Reexamination Certificate
active
06171312
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to an apparatus for preparing a bore in living bone. Specifically, the apparatus produces a bore in bone via an osteotome or compaction technique whereby bone is compacted into the side walls and the bottom wall defining the bore instead of being extracted from the bore as is typical during drilling techniques.
SUMMARY OF THE INVENTION
In one embodiment, a combination includes a plurality of tools for insertion into the bone to produce a bore at a site where an implant is to be installed and a mechanism for driving those tools. The plurality of tools have portions with the same basic shape but with progressively larger diameters. A set of tools may also include tools having variable shapes as well. Each tool has surfaces which urge the displaced bone radially outward and compress the displaced bone into the wall defining the bore. The driving mechanism can be one of a variety of types including, among many, electromagnetic-powered devices, hydraulically-powered devices, motor-driven devices, pneumatically-powered devices, and piezoelectric-powered devices.
The tools are coupled to the driving mechanism in series with the smallest being coupled first. The driving mechanism applies the necessary force to insert the tool into the bone. The driving mechanism can be operated in various ways. In one embodiment, the operator continuously moves the driving mechanism toward the bone to engage and contact the tool and to push it further into the bore. Such a driving mechanism has a portion for engaging the tool that undergoes reciprocating movement to “tap” the tool into the bore. The tool is not attached to the driving mechanism in this configuration, but is repetitiously engaged by the driving mechanism.
Alternatively, the driving mechanism includes a shaft that is attached to the tool. The shaft of the driving mechanism causes gradual, steady movement of the tool as it is inserted into the bore. Instead of this gradual movement, this movement imparted on the tool can be incremental or stepped. And, the steady movement can be supplemented by high-frequency vibration to further assist in the insertion of the tools
To further enhance the system, a controller can be used to provide for a more accurate insertion of the tools. For example, the controller may control the depth of insertion, the frequency of reciprocating motion, or the force of insertion.
The driving mechanism may also be modular in that it could be used to insert the dental implant into the bore after the tools have provided the appropriately sized bore. Thus, the shaft of the driving mechanism has means to engage the top portion of a self-tapping implant and screws the implant into the bore. The engaging means may also interface with a tap that is used prior to the insertion of a non-self-tapping implant. Lastly, the engaging means may be coupled to the top portion of a non-threaded implant which is pushed into the bore.
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Buiz Michael
Implant Innovations, Inc.
Jenkens & Gilchrist
Woo Julian W.
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