A medical device assembly comprising: an orientation bearing having an inner surface defining a hole; a positioning member engaged to the orientation bearing, the positioning member having a longitudinal body extending between a leading end and a trailing end; a cutting assembly, wherein the cutting assembly comprises a cutting blade and a cutting assembly support, and wherein the cutting assembly support has a mating portion configured to be rotatably disposed within the hole of the orientation bearing; a drive member having a drive member body extending between a drive member leading end and a drive member trailing end, wherein the drive member leading end is configured to engage the cutting assembly to rotatably drive the cutting assembly; and a drive seat disposed between the cutting assembly support and the drive member in an assembled configuration, wherein the drive seat is configured to communicate with the cutting blade, the cutting blade extending distally from the cutting assembly support, wherein the drive member is configured to engage the drive seat, and wherein the drive seat comprises a proximal end having a keyed interface configured to mate with a complementary keyed interface of the drive member leading end; characterized in that: the cutting blade is a curved cutting blade, wherein a spline shaft extends distally from the keyed interface of the drive seat, and wherein distal spline teeth on a distal end of the spline shaft engage complementary geared teeth of the curved cutting blade disposed in the cutting assembly support such that a rotational movement of the spline shaft translates into an arcuate movement of the curved cutting blade. an orientation bearing having an inner surface defining a hole; a positioning member engaged to the orientation bearing, the positioning member having a longitudinal body extending between a leading end and a trailing end; a cutting assembly, wherein the cutting assembly comprises a cutting blade and a cutting assembly support, and wherein the cutting assembly support has a mating portion configured to be rotatably disposed within the hole of the orientation bearing; a drive member having a drive member body extending between a drive member leading end and a drive member trailing end, wherein the drive member leading end is configured to engage the cutting assembly to rotatably drive the cutting assembly; and a drive seat disposed between the cutting assembly support and the drive member in an assembled configuration, wherein the drive seat is configured to communicate with the cutting blade, the cutting blade extending distally from the cutting assembly support, wherein the drive member is configured to engage the drive seat, and wherein the drive seat comprises a proximal end having a keyed interface configured to mate with a complementary keyed interface of the drive member leading end; characterized in that: the cutting blade is a curved cutting blade, wherein a spline shaft extends distally from the keyed interface of the drive seat, and wherein distal spline teeth on a distal end of the spline shaft engage complementary geared teeth of the curved cutting blade disposed in the cutting assembly support such that a rotational movement of the spline shaft translates into an arcuate movement of the curved cutting blade.