How to Keep the Cleanliness of Dental Handpiece

We offen use the dental equipment to do the dental practice. But do you pay attention to their cleanliness? You should know it is very important. Today we talk how to keep the cleanliness of dental handpiece.

Dental handpiece having means for opening and closing a chuck. A device for opening and closing a chuck for a dental handpieces has a handle portion and a powerhead assembly including a hollow driving shaft having, adjacent to its outer orifice, a forwardly outwardly tapering portion defining a small diameter rear portion and a large diameter front portion. A chuck pusher is held in a socket member with a disc plate spring interposed between the socket member and the chuck pusher, and the pusher is movable for axially displacing the chuck to hold or release the dental tool.

Wipe down the handpiece with a damp disposable cloth. If there is still some bioburden left on the handpiece, clean under running water using a brush. A mild detergent is acceptable. Be sure that all bioburden is removed before proceeding to the next step as it can act as a protective sheild for microorganisms in the dental autoclave.

Using a pen droplet oiler (Pen Oil), insert 2-3 drops of oil into the drive air tube.  Insert a drop of oil into the chuck and speed ring (if available) of the handpiece. Because there are many different types of motors in the industry,  this image (left) guides you to how much lubrication to apply and to what parts of the dental micro motor. Approximately once a month or whenever you see a lot of debris build up; be sure to clean the handpiece threads with a paper towel and isopropyl alcohol. Wipe down the exterior of the handpiece with a dry towel to remove any expelled fluid or debris. The handpiece should be completely dry at this point.

Unused handpieces and handpieces which had been exposed to clinical dental procedures were contaminated with Streptococcus mutans, exposed to steam or ethylene oxide, and flushed with sterile saline. Washings were plated on mitis-salivarius agar, and colonies identified and counted. This data suggests that a substance entrapped within ‘clinical’ handpieces (possibly the biofilm) may protect bacteria from ethylene oxide gas, preventing adequate sterilization.

One used dental handpiece from each hospital or department of stomatology in general hospital selected was detected for possible contamination of bacteria by aerobic bacterial count and CONCLUSIONS: dental handpieces without anti-suction should be replaced soon by those with it or comprehensive dental unit with anti-suction device should be used. Used dental handpieces must be sterilized effectively before next use. Awareness on prevention from cross-infection should be improved for dental-care professional staff and operation of sterilization should be standardized.

10 Facts About the Dental Drill

10 Interesting Facts About the Dentist’s Drill

Diamond Coated Dental Drill Bit

1 – There are two main types of dental drills: the high-speed and the slow-speed.  The high-speed drill rotates around 250,000 RPM.  That means it spins around more than 4,000 times each second!

Even the relatively slow dental drill rotates at about 8,000 RPM.  By comparison, this DeWalt Drill is three times slower with a top speed of 2,500 RPM.(low speed handpiece)

2 – After using the dental drill on your tooth for 30 seconds, your dentist is subjected to as much bacteria as they would be had you sneezed right in their face (Source).  That’s one of the reasons most dentists wear face masks.

3  – The high-speed dental drill shoots out water as it spins, as you can see in the photo above.  If it didn’t, the friction would cause your tooth to get so hot during a filling that it could possibly damage the nerve inside your tooth.

4 – Many dentists now refer to the dental drill as a handpiece to make it seem more friendly and enticing.

5 – The dental drill has to withstand the rigors of sterilization after every use, which means it gets heated to 250° Fahrenheit with pressurized steam for at least 15 minutes.

6 – The very first dental drill appears to have been a bow drill used by an ancient civilization about 9,000 years ago.

7 – The drill bits that dentists use are made of tungsten-carbide.  Some have blades to cut teeth, like in the photo below, and others are coated with diamonds to give a sandpaper-like smoothing effect (see photo below).

8 – As recently as the early 20th century, many dentists used drills that were powered by a pedal that the dentist would pump with his foot.

9 – The distinct shrill sound that the high-speed dental drill makes can be a major factor in people’s fear of the dentist.  Even for those who don’t have dental fear, the dental drill’s noise can be very unpleasant.

10 – Dental drills can be expensive, with many costing over $1,000.  That’s a lot more expensive than your average home-improvement drill.

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Dental micro motor and dental handpiece

The dental micro motor and dental handpiece are one of the most used equipment in a dental lab, so you should take choose the best one for your practice into considering.

Most dental micro motor come with a corresponding handpiece , however, many vendors also offer a variety handpieces for each motor. Dental laboratory motors are often controlled via foot pedal, although some do offer a hand dial. If space is an issue, there are wall mounted motors. If mobility is important, there are also lightweight compact motors.

dental micro motor

Dental handpiece connection type is most likely “E” couple, as this is the most commonly used. Many electric motors support straight and contra-angle handpieces and some vendors manufacture a system with two motors allowing switching between low-speed and high speed handpiece without removing dental attachments.

There is a large number of laboratory dental handpieces and their corresponding motors on the market. Features vary from handpiece to handpiece but can include; all-in-one turbine, air nozzle and spray, reduced weight and ergonomic design, whisper quiet/ no vibration, high torque, fiberoptics and smooth transitioning while increasing or decreasing rpm’s. So you must consider what features that will be most beneficial to your dental lab as well as what materials your lab works with most frequently When choosing a dental laboratory handpiece and motor.


A Comparison Between Air Driven and Electric Dental Handpieces

Electric Handpiece Gains Ground in The Clinic
The comparison issue is raised more as the electric handpiece gains ground in clinical use. Coupled with it’s ability to incorporate attachments geared to produce speeds to 200,000+ rpm, the electric handpiece makes a strong bid for its place in the clinical arena. While air driven handpieces typically win the speed race (350,000+ rpm), another variable is introduced – Torque.
Remember, Torque is a measure of how hard something is working, and Watts tell us the rate at which the work is being done.
The average high speed handpiece develops 16 to 17 Watts. To reach this level, it must obtain and hold it’s optimum speed. As the turbine slows, the air driven handpiece loses a portion of it’s ability to cut, as the power output of the handpiece (Watts) decreases as well.
Modern brushless electric motors have the ability to maintain constant torque over practically the entire speed range, so the power output of the handpiece (Watts) is more consistent as well. The Kavo electric handpieceElectroTorque brushless electric motor ranges from 20,000 to 40,000 rpm. Coupled with a speed increasing attachment, it can maintain constant torque between 27 and 200,000 rpm.
So, are we going to go out and buy all new electric setups for each operatory? The cost alone would probably preclude that. Air driven handpieces will likely maintain their place for quite some time. At less than $1000 for a good one, with no other attachments required, the cost is a little easier to swallow.
Weight is another issue. Air driven highspeed handpieces are still a bit lighter and easier to handle. Modern air driven handpieces are beginning to develop much greater torque as well.
electric handpiece
Learning to use an electric handpiece is worth the effort
The electric low speed contra angle handpiece has definitely come a long way, and certainly deserves it’s place in the modern practice. With a little patience, learning to use this newer technology can pay off. There is a learning curve, but not too steep. One large advantage, for the progressive practice, is a quicker patient turnaround, as cutting is a bit faster. Electrics also tend to last a little longer between repairs, which helps to offset the initial cost.