Rotary cutting tool and powered handpiece adaptor assemblies, systems, and methods of use
An adaptor assembly for coupling a cutting tool to a drill drive chuck such that driven rotation of the drive chuck is transferred to the cutting tool by the adaptor assembly. The adaptor assembly includes a rod, a collet and an enclosure. A proximal region of the rod provides an adaptor male coupling portion configured to engage a drill drive chuck. A leading of the collet provides an adaptor female coupling portion configured to engage a surgical cutting tool tang. Further, the rod and the collet form complementary engagement features for coupling to one another. The enclosure rotatably maintains the collet. Upon final assembly of the rod to the collet, rotation of the rod is transferred to the collet. During use, the adaptor assembly can facilitate coupling of a cutting tool to a powered handpiece under circumstances where the cutting tool is otherwise incompatible with the powered handpiece.
1 . A surgical system for cutting tissue, the system comprising:
a powered handpiece including:
a housing,
a drive chuck rotatably maintained by the housing and providing a drill female coupling portion;
a surgical cutting tool including:
a shaft defining opposing, first and second ends,
a cutting head provided adjacent the first end,
a tang provided adjacent the second end and providing a tool male coupling portion;
an adaptor assembly including:
a rod defining a proximal region opposite a distal region, wherein the proximal region provides an adaptor male coupling portion configured to engage the drill female coupling portion,
a collet defining a trailing region opposite a leading region, wherein the leading region provides an adaptor female coupling portion configured to engage the tool male coupling portion,
wherein the distal region of the rod and the trailing region of the collet form complementary engagement features for coupling the rod to the collet, the complementary engagement features including drive surfaces arranged to slidingly contact corresponding driven surfaces,
an enclosure rotatably maintaining the collet;
wherein a format of the tool male coupling portion differs from a format of the drill female coupling portion such that the tool male coupling portion is incompatible with the drill female coupling portion; and
wherein upon final assembly of the rod to the collet, driven rotation of the drive chuck is transferred to the surgical cutting tool by the adaptor assembly.
2 . The surgical system of claim 1 , wherein the complementary engagement features are configured to transfer torque directly from the rod to the collet during operation.
3 . The surgical system of claim 1 , wherein the complementary engagement features are configured for axial assembly of the rod to the collet.
4 . The surgical system of claim 1 , wherein the enclosure includes a distal end region having a bore sized to rotationally support the shaft of the surgical cutting tool during operation.
5 . The surgical system of claim 1 , wherein the enclosure includes one or more bearing assemblies for rotatably supporting the collet.
6 . The surgical system of claim 1 , wherein the adaptor assembly comprises a conversion device and a drive device, the conversion device including the rod and the drive device including the collet.
7 . The surgical system of claim 1 , wherein the adaptor assembly is configured such that the rod and collet are assembled in an axial direction relative to a longitudinal axis of the collet.
8 . The surgical system of claim 1 , wherein the enclosure is configured to support a curved shaft of a surgical cutting tool.
9 . The surgical system of claim 1 , wherein the adaptor assembly is configured to provide an axial lock between the rod and the collet.
10 . The surgical system of claim 1 , wherein the adaptor assembly is configured to provide a rotational lock between the rod and the collet.
11 . The surgical system of claim 1 , wherein the adaptor assembly is configured to transfer rotational force in both clockwise and counterclockwise directions.
12 . The surgical system of claim 1 , wherein the adaptor assembly is configured to accommodate surgical cutting tools having an annular groove for axial locking.