Blog Entries - 2015


Posted on: December 21, 2015

Precision Handpiece Repair LLC offers free handpiece maintenance training to your employees. Your handpieces are a big investment to your practice. Employees should be trained on how to maintain them. We recommend having one individual that is in charge of the maintenance of the handpieces and being accountable for the proper cleaning and lubrication of the handpieces. A lot of dental offices have 3-4 people that take care of the handpieces which causes confusion and lack of accountability for the correct lubrication of the handpiece.

Handpieces should be cleaned with a lite soap and water or rubbing alcohol. Never use disinfectants on your handpieces.  Don’t wipe your handpiece with a chemical disinfectant, this may cause a reaction with the metal shell when heated, possibly shortening the lifespan of your handpiece causing build-up and corrosion.

Precision Handpiece Repair LLC services the following areas: Northern Kentucky, Lexington Kentucky, Louisville Kentucky, Indianapolis Indiana,  Cincinnati Ohio, Dayton Ohio, and Columbus Ohio Call us at 513-293-3341.

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Maintenance Tips For Your Ultrasonic Cleaner

Posted on: November 30, 2015

Maintenance Tips for Your Ultrasonic Cleaner

To get the most from your investment in an ultrasonic cleaner you should avoid practices that degrade performance.  But because mistakes occur you also need to know how to remedy situations that may arise due to improper use, or in the case of cavitation erosion postpone its onset.

A question we get here at Precision is how to avoid rust films on ultrasonic cleaning tanks. Elma ultrasonic cleaners have stainless steel tanks, which under normal conditions do not rust.  Instead, rust films are introduced as a deposit either from ferrous products being cleaned or from tap water used in the tank.  Rust stains can be avoided by regularly cleaning the tank surface using a suitable cleaning solution such as elma clean 60 or 215 to remove deposits before they have the opportunity to stain the tank surface.  If stains are present, an alternative is to operate the cleaner in a heating mode with water plus the cleaning solution.

Under no circumstances should scouring media be employed in any tank cleaning operation.

Another detriment to performance is a mineral deposit (also called furring) that can occur around heating elements when ultrasonic baths are operated at high temperature.  These deposits are caused by highly calciferous water in contact with hot surfaces.  Furring – as well as heat-caused discoloration of the tank – can be minimized by continuous circulation of the heating bath to avoid hot spots near the heaters.  A recommended practice is to turn on the ultrasound as the bath begins to heat. This helps ensure temperature distribution is equal throughout the bath.  But if furring or discoloration occurs the remedy and caution are the same as for removing rust films.

Pinholes are a more serious concern for ultrasonic cleaning tanks. These can be caused by mechanical abrasion if metal parts being cleaned, or if metal parts containers, are in direct contact with the tank surface.  To avoid this always use a basket when cleaning such parts and be sure the basket does not contact the tank floor or walls.  Highly acidic baths can also cause pinholes.  If such acidic solutions are necessary they should be put into a special container that in turn is placed in the ultrasonic cleaning tank filled with water. Note that pinholes resulting from improper use of ultrasonic cleaning tanks may void warranties.

A fourth maintenance tip deals with cavitation erosion that can occur in the areas around the transducers.  Cavitation erosion is a natural byproduct of ultrasonic cleaning and, depending on how the units are used, will sooner or later occur to the point where the tank will leak.  To postpone this institute regular tank cleaning to remove abrasive particles that fall from objects being cleaned.  Ultrasound moves these particles around the tank bottom where they have the effect of small drills that damage the tank floor.  As above, highly acidic cleaning solutions can likewise damage the steel, as can placing items being cleaned directly on the tank floor.  Another good practice is to maintain cleaning fluids at the proper level for the particular tank. Call Precision Handpiece Repair for more details at 513-293-3341. We service Cincinnati, Northern Kentucky, Louisville, Lexington, Columbus, Dayton and Indianaoplis.

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6 Tips To Help Maintain Your Handpieces

Posted on: November 9, 2015

 Precision Handpiece Repair LLC top 6 tips to help maintain your dental handpiece. Following these tips will help extend the life of your handpiece.

  1. Don’t wipe your handpiece with a chemical disinfectant, this may cause a reaction with the metal shell when heated, possibly shortening the lifespan of your handpiece causing build-up and corrosion
  2. Always apply enough cleaner or lubricant to your handpiece. A general rule of thumb is to apply enough product to ensure the cleaner comes out of the head and the bearings are covered.
  3. The chuck must be cleaned to remove debris weekly to maintain the bur mechanism, otherwise your bur may fall out during the procedure
  4. Gently wipe and run the fiber optic/LED lens under water. If you don’t, this may result in build-up on the lens and provide dismal light quality. You could also use a cotton swab wet with isopropyl alcohol
  5. Don’t run your handpiece under cold water immediately after use. Let it cool down first as the sudden temperature change may damage the turbine.
  6. Ensure you always follow the manufacturer’s guidelines on air pressure. Too much air pressure puts excess strain on the handpiece and can cause damage to the turbine bearings.

If you follow the above you can save thousands of dollars on handpiece repair. Precision Handpiece Repair LLC services the following cities: Cincinnati, Northern Kentucky, Indianapolis, Dayton, Louisville, Lexington, and Columbus. Call us at 513-293-3341.


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Posted on: October 21, 2015

AG Neovo Dental Handpieces Win Catapult Vote of Confidence

AG Neovo Dental is happy to announce that its Evolve Series handpieces, launched at ADA 2014, have secured the endorsement of Catapult, an esteemed specialised institution committed to providing dental professionals with unbiased clinical information.

Catapult works with dentistry innovators and manufacturers by reviewing, assessing, and promoting cutting-edge techniques and developments. Its team of Key Opinion Leaders (KOLs) helps manufacturers broaden their message reach and raise brand awareness through product reviews, live lectures, articles, and online continuing education courses.

AG Neovo Dental’s Evolve Series comprises a full gamut of air-driven, KAVO/NSK compatible, standard/mini-head, high-speed handpieces. While Enduro™ Chuck ensures their cutting efficiency and durability, the lightweight handpieces also feature ergonomic design, less vibration, and a lower noise level.

A total of 22 Catapult KOLs chose to evaluate four out of the eight Evolve Series high-speed handpieces: E-6510K (KAVO compatible with light), E-6510N (NSK compatible with light), E-6500K (KAVO compatible without light), and E-6500N (NSK compatible without light), and the majority verdict was that they would recommend the tested handpieces to their colleagues in the field of dentistry. The score of total performance from the KOLs was 4.32 out of 5, which duly reflects high credits on overall design, ease of use and installation, spray pattern, bur concentricity, and noise level. Incidentally, the Evolve Series are rated as offering a cost-performance ratio of the same tally.

“The AG Neovo Dental Evolve Series is either the same or superior to the $900 handpiece that I use,” says one of the KOLs from Catapult. “This is an outstanding result for a product that we all use every day, year after year, and it is our pleasure to give it the Catapult Vote of Confidence.” Quote from Lou Graham, DDS, President & Founder of Catapult Group, LLC.

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3 Reasons To Consider Automating You Handpiece Maintenance

Posted on: October 9, 2015

The automatic handpiece maintenance systems on the market today are built with the modern dental practice in mind. They’re fast and versatile, cleaning nearly any handpiece available. 1. Automation: A handpiece maintenance system helps eliminate

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Types Of Tubing Connections

Posted on: September 8, 2015

What Are the Types of Tubing Connections?


2 Hole (Borden Connection)

  • Usually the standard in developing countries (e.g., all of Latin America).

  • Has one large hole, which is air intake to drive the turbine to spin, and a small hole for water to cool the bur/tooth.

  • No air exhaust, so the exhaust just blows right out of the handpiece, making it much louder.

  • Also, no chip air, so the water comes out more as a stream than as a fine mist.

  • A 2/4 adapter can be used to fit this kind of handpiece onto 4 hole tubing, but the handpiece will still not have the chip air or exhaust air features.


    3 Hole

  • Used very little. In fact, we may be one of the last manufacturers still to offer this style!

  • Has the same handpiece thread design as 2 hole, but with the addition of one extra small tube for the chip air line to allow the water to come out as a fine mist.

  • Can be converted to 2 hole by simply removing the chip air tube.


    4 Hole (Midwest Connection)

  • The standard in the U.S. and Europe.

  • Has two large air holes (the smaller of the two is air in and the larger is air exhaust out).

  • Also has two small holes, a water tube and a chip air tube (which brings air to the head where it either mixes with or hits the water to make a fine mist) to cool the bur/tooth and clear debris.

  • A 4/2 adapter can be used to fit this kind of handpiece onto 2 hole tubing, but the handpiece will lose the exhaust and chip air feature.


    5 Hole

  • Has the same handpiece thread design as 4 hole, but with the addition of a fiber optic rod which

  • transmits light through the handpiece and illuminates the bur and tooth area for better visibility.

  • Has all the other features of 4 hole as well.

  • A 5 hole handpiece can be used on 4 hole tubing, but the light feature will not function.


    Quick Disconnect Coupler Connections

  • Couplers can be 2 hole, 4 hole, and fiber optic (2 types).

  • 5 hole fiber optic couplers have an internal glass rod that goes onto tubing that has a light source (bulb) either in the tubing or on the dental control unit.

  • 6 pin couplers (with 4 holes like a normal 4 hole handpiece plus 2 metal pins to provide electricity) have the light bulb in the coupler itself.


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Low Speed Handpiece 101

Posted on: July 17, 2015

What is a Low (Slow) Speed Handpiece?

  •  A hand held motor, usually air-driven (can also be electric), that spins a cutting bur or prophy cup at 50,000 RPM or less.
  • Used for removal of caries, refining a cavity preparation, performing prophylaxis, and other endodontic and implant procedures.
  • Straight attachments that use handpiece burs are generally used for trimming prosthetics.

How Does a Low Speed Handpiece Work?

  • An airline is attached to the back end of the handpiece, similar to a high speed handpiece.
  • When air is introduced into the handpiece (via the chair unit foot pedal), air is forced over the vanes of the rotor (consisting of vanes or blades), which causes it to spin.
  • After the air moves around the rotor, it is forced out through the handpiece’s back end exhaust port.


Features and Functions


How Fast Does a Low Speed Handpiece Run?

  • The speed depends upon the pressure (PSI) of the air supply, the configuration of the rotor components, and the gears inside the motor.
  • Low speed handpieces are designed to handle much more air pressure than high speed handpieces.
  • Typical low speed motors, without gear reductions, running at 40 PSI should spin at approximately 20,000 rpm.
  • Speed reducing gears allow the handpiece to generate significantly more torque.
  • Hygienist handpieces and low speeds used for prophylaxis generally operate at 5,000 RPM.
  • Endodontic and implant procedures use attachments to reduce the speed to 1,500 rpm or less and generate very high levels of torque for optimal control.


How Long Will a Low Speed Handpiece Last?

  • Slow speed handpieces can have long life spans due to the low operating speeds and design differences (compared with high speed handpieces.)
  • The handpieces can be repeatedly overhauled but should have professional maintenance conducted every 6-12 months.


What Type of Handpiece Connections and Tubing Compatibility Does a Low Speed Handpiece Have?

  • Similar to high speed handpieces, low speed handpieces can be either fixed back or quick disconnect style, with 2 different tubing configurations: 2 hole and 4 hole.
  • Because low speed handpieces operate at significantly lower speeds than high speed handpieces, there is less need for cooling the tooth with air and water spray.
  • Therefore, most low speed motors are configured so that no water is transferred through the water tubes; however, low speed handpieces still maintain the international standard backends that high speed handpieces have, for the sake of compatibility with tubing.
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Posted on: June 14, 2015

What is Retipping?

Retipping your dental instruments is a process that extends both the life of your instruments and your budget by replacing only what is needed: the tips. Instead of discarding perfectly good handles, we remove what remains of the tips and insert new ones into the handles. This brings your instruments back to life at a fraction of the cost of buying a new instrument. Think of it like the difference between putting new brakes on your car versus buying a new car. It doesn't make much sense to buy a new car if it just needs a relatively inexpensive repair.

Is it Safe?

Absolutely. The process by which your instruments are retipped is the same process used to manufacture them, with the addition of having to remove your old tips. In any case, whether your instruments are brand-new or have been retipped, you should inspect them before each use. Be sure to check your instruments for any sign of damage or warping, especially where the tip and handle meet. We also recommend testing your blades by pressing them on a hard, sterile surface with a pressure equal to the pressure you use while working with the instrument. This can help alert you to any integrity problems your instrument may have, such as more "give" then normal or breakage. If you detect any problems, please set the instrument aside for further inspection or for service.

What Kind of Dental Instruments Can You Retip?

Currently, we can retip:

Scalers - Curettes - Explorers - Probes - Spoon Excavators - Carvers - Pluggers - Burnishers - Plastic and Composite Instruments - Surgical Scalers - Surgical Curettes - Surgical Knives - Elevators - Root Tip Picks

Basically, we can retip any kind of hand instrument.

Can You Retip Other Brands of Instruments?

A vast majority of other manufacturers' instruments are retippable. However, some instruments are unable to be retipped. Examples include instruments made from one solid piece of molded steel or those with handles that are made completely of plastic or resin.

If you have any instruments that are not retippable, do not despair! Recycle your instruments with our trade in program made just for you.

Can I Change From One Instrument to Another?

Absolutely! Scalers and curettes are interchangeable - you can switch from one type of scaler to another, or to a curette (or vice-versa). You can also switch from any operative instrument to any other. Explorers and probes are also interchangeable. Simply separate the instruments you want retipped differently and note on your instructions to "retip as" followed by the tips you would like on your instrument. The instrument will be retipped with the design of tips you wanted and returned to you at no extra charge other than the standard retipping fee. However, please note, that the instrument's handle will still bear the name and part number of the old instrument. If this causes any issues, consider color-coding your instruments based on the type of instrument they are, or perhaps an all-out trade in of your instruments would be appropriate.

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What Is The DentalVibe?

Posted on: June 6, 2015

Pain-Free Injections with DentalVibe Microprocessor-controlled, pain-blocking VibraPulse technology helps alleviate injection pain. Fear of pain is universal. According to, studies coming out of the Dental Fears Research Clinic in Seattle,

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Major Causes Of Handpiece Failure

Posted on: May 27, 2015

          Major Causes of Handpiece Failure

Dental handpieces have many reasons for failure but most common that we see as a repair facility can be prevented if proper care and understanding of the instrument is used.

These are:

  1. Sterilization

  2. Lack of lubrication or proper lubrication

  3. Being dropped

  4. Ran with a bent bur or no bur at all

  5. Using the wrong handpiece for the job

Handpieces must be purged of any debris prior to sterilization. The debris may become hard or gummy after the sterilization process. This will dramatically affect the bearings performance and consequently the handpiece life.

Bearings are made of an inner race, outer race, retainer cage and 7 to 8 solid ball bearings. Each ball is about the size of a pen tip. The bearing balls ride on a grooved surface between the inner and outer raceways. The retainer keeps the balls equally spaced as they rotate around the inner race.

    The ball bearings spin between 350,000-400,000 rpm which is needed for the handpiece to function properly. It is easy to see that any small amount of foreign substance inside the bearing will dramatically affect its ability to perform.

  • When air pressure exceeds the recommended settings of 32-35psi, the bearing will turn greater than 350,000-420,000 rpms that they are rated for. When this happens ball bearings that are held equally spaced by the retainer will start to oval the retainer holes. Eventually one hole will meet the next hole and so on until the retainer will break in half for a complete bearing failure. If heavy side pressure on the handpiece is used it will cause the bearing balls to roll vertically in the retainer. The holes will enlarge causing increased radial play of the bur.

  • When handpieces are repeatedly over sterilized and or sterilizer is not temperature calibrated correctly the excessive heat will cause the retainers to creak on top part of the ball hole at the weakest point this will also cause the bearing to fail.

  • If a bur is bent and is used it will cause the bearings to run out of concentricity. It is similar to a tire being out of balance. This will also cause the bearing balls to roll vertically leading to failure. Running without a bur may cause the chuck to back out into the cap.

  • If a handpiece is dropped, the head may become dented. The dent will put pressure on the o-rings and bearings. If the dent is severe enough the bearings may become squeezed and also lead to premature failure.

  • Handpieces must always have a backend gasket and swivel styles must have good pliable O-rings. If a good seal is not made, either air or water will find the path of least resistance and flow where it is not supposed to causing poor performance.

 Using the correct handpiece for the job at hand is important. The use of torque style (Large head) handpieces should be used for heavy cutting when needed. Small heads should be used for lighter applications.

It’s not recommended to extend the bur due the chance it may walk out of the handpiece.                                                           

Heads & Prophy Angles

Take them apart and lube the top, middle and bottom. Re-install. We recommend adding lubricate 2-3 times per week based on use.

Sheath & Contra Angles

Lubricate the top and bottom with 1-2 drops of oil. Sheaths do not have to be oiled every day. We recommend adding oil 2-3 times per week based on use.

Low Speed Lubrication

Lubricate air intake with 2-3 drops of oil after each use. Never autoclave a detachable motor.

Highspeed Lubrication

Lubricate air intake with 2-3 drops of oil. Add one drop into the chuck also. Highspeeds should be lubricated every time before use. Be sure to expel excess lubricant before you put them into the autoclave.

Always clean the surface with alcohol (Do not use harsh cleaners, or ultrasonic cleaner)

      Common Handpiece Maintenance Mistakes


Using a chemical wipe –down on handpieces before sterilizing: This may cause harmful reactions when the handpiece is subject to heat.

  1. Using an ultrasonic cleaner: Handpieces should never be immersed in any fluids.

  2. Lubricating in the wrong hole. The drive airline leads directly to the turbine.

  3. Not applying enough lubricant- It is important to ensure oil is getting to the bearings, by seeing oil leave the handpiece.

  4. Not running the handpiece prior to autoclaving-failure to operate the handpiece following lubrication will gum up the turbine and excess oil gets baked into the bearings.

  5. Leaving the bur in the chuck during autoclaving-This shorten the life of the auto chuck and will lead to build up of debris in the chuck.

  6. Failing to maintain autoclaves-If the autoclave is not properly cleaned, buildup can occur that contaminates the entire system, including the handpiece.

Handpieces are precision instruments but will not last forever. They will wear out over time. If proper care and regular maintenance are preformed they should provide several years of excellent service.

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Electric Vs Air

Posted on: May 19, 2015

Comparison of Electric and Air Driven Handpieces

Dental Handpieces - Electric v. Air

Many of the pros and cons of both air driven and electric handpieces are well known, or at least well known among dentists who've used both types for any significant time, or for those who've read on the subject.  For those not familiar with the differences, we thought we'd provide a little information to aid you in your future consideration of one or the other.

Electric Handpieces Pros & Cons


Electric handpieces typically have a large range of speed control, allowing them to be used for both high and low speed procedures by simply changing out a few attachments.  They are also known for having very constant torque, providing for steady cutting, and precision, even under heavy load.  The lack of an air turbine also allows them to be extremely quiet.


Most electric handpieces are heavier, and can cause fatigue during longer procedures, or after a long day of long procedures.  However, some dentists argue that this claim has more to do with improper technique, whereby simply holding the handpiece differently mitigates the slightly increased weight.  They are also prone to overheating, which has been known to actually burn patients.  This overheating is typically not an issue with air driven handpieces because the conditions that might cause it, increased friction due to poor maintenance, or dull burs, tend to notably diminish performance, signaling a problem.  By design, an electric handpiece simply raises power output to overcome the additional load, causing the head to overheat.  Less maintenance is often cited as an advantage of electric handpieces, but in light of the potential for burning patients, this claim seems dubious.

Air Handpieces Pros & Cons


As a counter point to the high torque associated with electric handpieces, some dentists prefer the lower torque feel of air handpieces.  The lower torque is less prone to accidentally damaging the tooth with excessive force.  They are also easier and cheaper to repair.



They're loud!  The high frequency drone of an air driven handpiece has been linked to hearing loss, general annoyance, and a Pavlovian fear response, deterring many patients from keeping their regular prophylactic visits.  As they wear out they are more prone to bur chatter, whereas by design, the electric handpieces are not.  And although lower torque can in some instances be thought of as an advantage, it is generally considered a disadvantage, with most dentists preferring the precision and accuracy associated with the higher torque electric motor.

There are of course, numerous other differences and considerations, but those are some of the more salient and  widely recognized ones.  Another oddity of usage has been that, on average, American dentists tend to prefer air driven handpieces, whereas in Europe the electric handpieces are exceedingly more popular.  There are clearly some distinct differences between the two types of handpieces, and personal preference aside, it may be that both electric, and air driven models have their place, where one has a weakness, the other often has an advantage.

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