A drill bit for drilling a cavity or a recess into a skull, wherein the cavity or the recess is configured to receive an implantable fixture screw unit of a hearing aid system, is disclosed. The drill bit includes a first part including a drill tip with a first drill diameter, wherein the drill tip comprises a tip angle of between 137 degrees to 143 degrees along a longitudinal axis of the drill bit and wherein the drill tip comprises a back rake angle of between −1 degree and +1 degree, in particular a back rake angle of substantially 0 degrees, a second part including a plurality of flute blades with a second drill diameter, wherein the second drill diameter is greater that the first drill diameter, and a transition part which is arranged between the first part and the second part and along the longitudinal axis, wherein the transition part includes a body clearance.

A surgical drilling instrument with a Curved Burr Attachment having an adapter removably coupled to a drill motor and a burr attachment coupled to said adapter. The burr attachment includes a tube with a wire shaft supported therein and a coil wire surrounding said wire shaft and having each of the coils touch the outer periphery surface of the wire shaft and the inner peripheral surface of said tube to enhance cooling of said outer periphery of said tube from the heat generated by said wire shaft and attenuate vibrations while allowing said burr attachment to be bent without kinking.

A handpiece for a handheld surgical instrument having a motor and a heatsink is provided. The motor is within a motor housing and the heat sink is disposed around and thermally coupled with the motor housing. The handpiece is formed from a material having a first thermal conductivity and the heat sink has a second thermal conductivity that is greater in value than the first thermal conductivity of the material of the handpiece. The heat sink is configured to dissipate heat from the motor during operation of the motor to the handpiece.

A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.

The present disclosure relates to a device that can guide perpendicular drilling and simultaneously measure flatness of an insertion surface through a locking protrusion by rotating the device in bone conduction implantation. According to the present disclosure, it is possible to measure flatness and guide perpendicular boring with a constant force even without using a separate flatness measurer in surgery. Further, it is also possible to guide drilling using a spacer having a smaller diameter by using an assistant guide member.

A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.

A surgical drilling instrument with a Curved Burr Attachment having an adapter removably coupled to a drill motor and a burr attachment coupled to said adapter. The burr attachment includes a tube with a wire shaft supported therein and a coil wire surrounding said wire shaft and having each of the coils touch the outer periphery surface of the wire shaft and the inner peripheral surface of said tube to enhance cooling of said outer periphery of said tube from the heat generated by said wire shaft and attenuate vibrations while allowing said burr attachment to be bent without kinking.

A system is disclosed for performing a surgical procedure on a patient. The osteotomy system includes an elongated introducer defining a lumen and including a window formed in an outer wall thereof that is in communication with the lumen. At least one medical instrument is configured for insertion into the patient through the elongated introducer such that the at least one medical instrument is positionable within the window. The window is configured to receive target tissue such that the target tissue extends into the lumen, whereby the elongated introducer shields collateral tissue from the at least one medical instrument to reduce any unintended effect on the collateral tissue during the surgical procedure.

A handpiece for a handheld surgical instrument having a motor and a heatsink is provided. The motor is within a motor housing and the heat sink is disposed around and thermally coupled with the motor housing. The handpiece is formed from a material having a first thermal conductivity and the heat sink has a second thermal conductivity that is greater in value than the first thermal conductivity of the material of the handpiece. The heat sink is configured to dissipate heat from the motor during operation of the motor to the handpiece.

A burr attachment designed for use with a curved burr attachment or other chuck attachments that includes a tube with a wire shaft supported therein and a coil spring surrounding said wire shaft and having each of the coils touch the outer periphery surface of the wire shaft and the inner peripheral surface of said tube to enhance cooling of said outer periphery of said tube from the heat generated by said wire shaft and attenuate vibrations while allowing said burr attachment to be bent without kinking.