This document describes an electric-pneumatic bone drill. It has a trigger switch that activates an electric motor, which drives a rotating chuck that can hold various accessories for boring holes or driving screws. A bone drill is used in surgery to create holes in bones for inserting nails, screws, or other implants. It works using both electric power and a handpiece operated via foot switch. Advantages include adjustable handpiece speeds and a lighter, shorter handpiece that remains cool. Disadvantages can include accidentally drilling too deep and heat buildup. Safety precautions when using it include wearing protective eyewear and lubricating to prevent overheating.
2. MECHANISM..
A trigger switch activates an electric motor, which in turn drives a
rotating chuck. Numerous accessories can fit into in the chuck, allowing
the drill to bore holes, drive screws , etc.
3. USES….
• Bone drill is a device that is used to create hole in the bone to insert
nails, screws, etc.
• The drilling of bone is done in many fields of surgery including
orthopaedics , neurosurgery, plastics and reconstructive ,
craniomaxillofacial and ENT.
• Drilling of bone is common to produce hole for screw insertion to fix
the fractured parts for immobilization.
• Other common reasons for drilling bones in surgery for fixing implants
and fitting prosthetic devices.
5. ADVANTAGES ….
• Handpiece options are given when plugged into the corresponding
console ports.
• Handpiece speed runs at the maximum setting and responds to the
degree of pressure applied to the footswitch or hand switch.
• It is load bearing and load shearing.
• Hand piece is shorter and lighter.
• Comfortable in handling and angle does not get hot.
• High reliability.
• Continues irrigation is necessary to remove the bone dust, help
dissipate the heat and decrease thermal heat.
6. DISADVANTAGES….
• Tissue damage can be caused if the drill goes to far by accident.
• Extra force is sometime needed to apply on hand drill which can lead
to plugging of drill tip.
• If the area around a drill hole experiences a dramatic rise in
temperature than this can negatively affect the healing process and
even cause permanent damage.
7. PRECAUTIONS….
• Use of safety glasses by operating staff is recommended to prevent
eye injury.
• Never rest the hand piece on the patient.
• Do not sterilize the console part or footswitch.
• Machines should be cleaned after use.
• Lubrication is important to remove heat and friction.
• Never change a saw, bur or drill while hand piece is running.
• Excessive pressure should not be applied.
