Device for implant work
AssigneeNobelpharma AB
InventorsLennart Loof, Pierre-Luc Maillefer
Life of this patent
Estimating the term…
Abstract
In connection with implant work on the dentine, a machining instrument is used which is provided with an attachment part for attachment to a rotary unit or for attachment to extension unit, which in turn can be applied to the rotary unit. The extension unit has a thickened central section which is provided with a recess or opening in which an inclined surface is arranged. In the applied position of a machining instrument, one surface of its attachment part is set against the inclined surface of the extension unit. The extension unit and the machining instrument are rotationally-fixed with respect to each other. Moreover, a locking effect is achieved between the extension unit and the machining instrument as a result of a secure wedging effect obtained by means of the inclined surface.
Claims12
An apparatus for reducing the number of different lengths required in machining instruments used in connection with implant work the machining instrument including an attachment part for attachment to a rotary unit for rotation of the machining instrument, said apparatus comprising:
- an extension unit including a first end, a second end and a central section extending therebetween,
- an attachment element of said extension unit provided at said first end and corresponding to said attachment part of the machining instrument, said attachment element allowing for mounting of said extension unit onto said rotating unit;
- a bearing recess extending from said second end of said extension unit for receiving the attachment part of the machining instrument therein;
- means provided in said central section of said extension unit for indicating longitudinal insertion position of said attachment part of the machining instrument inside said extension unit and for access to the inserted machining instrument for effecting separation of the machining instrument from said extension unit.
- an actuation surface provided in said bearing recess of said extension unit, said actuation surface being substantially straight in the longitudinal and transverse direction of said extension unit and a substantially straight corresponding opposite surface on the attachment part of the machining instrument, said actuation surface being inclined along the longitudinal axis of said extension unit, said corresponding opposite surface being substantially parallel with the longitudinal axis of the extension unit, wherein an angle of inclination is so selected that a wedging action occurs between said actuation and opposite surface upon insertion of said attachment part into said recess of said extension unit to thereby fixedly connect said machining instrument within said extension unit.
An apparatus for reducing the number of different lengths required in machining instruments used in connection with implant work each machining instrument including an attachment part for attachment to a rotary unit for rotation of the instrument, said apparatus comprising:
- an extension unit including a first end, and a second end and a central section extending therebetween,
- an attachment element provided at said first end of said extension unit and corresponding to said attachment part of the machining instrument, said attachment element allowing for mounting of said extension unit onto the rotary unit;
- a bearing recess extending from said second end of said extension unit for receiving the attachment part of the machining instrument therein;
- means provided in said central section of said extension unit for indicating longitudinal insertion position of the attachment part inside said extension unit and for access to the inserted machining instrument for effecting separation of the machining instrument from said extension unit.
- an actuation surface provided on said extension unit, said actuation surface being substantially straight in the longitudinal and transverse direction of said extension unit and a substantially straight corresponding opposite surface on the attachment part of the machining instrument, said actuation surface being inclined along the longitudinal axis of said extension unit at an angle of about 2.degree. to about 6.degree. towards said second end of said extension unit, said corresponding opposite surface being substantially parallel with respect to the longitudinal axis of said extension unit, wherein upon insertion of said attachment part of said instrument into said recess of said extension unit said machining instrument is locked within said extension unit.
Dependencies are inferred from the claim text.