Electric Contra Angles, like W&H WA-99, Kavo 25 LPA, and NSK X95L are driven by a series of stepped gears and an electric motor.
No air is available to force lubricant into handpiece head, the most critical area, as it contains gears and bearings subject to high speeds. Bearings and gears spinning at the highest speeds will most always be the first to break.
The use of automatic handpiece purge units is recommended for Electric Contra Angles, because they help ensure adequate lubricant reaches gears and bearings. Automatic Purge Units use air to purge excess lubricant and debris.
If your office has an automatic handpiece purge unit, great. If not, keep watching.
Aerosol handpiece spray lubricant is recommended for Electric Contra Angles to help ensure adequate lubricant reaches all critical areas of handpiece.
You should also have spray can attachments which match your handpiece. In most cases, an E-Type, and a Cone-type should suffice.
Clean handpiece exterior with alcohol and a good stiff brush. Don’t be afraid to clean fiber optic ports too. Helps the Doc see what he, or she, is doing. Any debris left on handpiece exterior can be baked on by the Sterilizer, making it harder to remove later.
Wipe handpiece exterior with a cloth to ensure moisture and loosened debris are removed.
Using E-type nozzle on Aerosol lubricant, grip handpiece firmly, hold handpiece head away from your face. Point head down into a cloth to contain excess spray and give two quick bursts into handpiece backend. Using cone nozzle, give one quick burst into handpiece chuck. Notice lubricant will try to splash back due to small holes in chuck providing more resistance.
Insert bur, attach handpiece to motor, hold with contra angle head down to allow gravity to help expel excess lubricant and debris. Run at minimum speed for 10 seconds, then high speed for another 20 seconds.
Discharge should be relatively clear. If not, process may be repeated. Wipe down contra angle to remove excess, and sterilize. If using sterilization bags with paper on one side, place paper side up in sterilizer. This helps allow excess steam and/or moisture to exit more easily.
We hope this explanation is clear and concise. Please feel free to visit our site, drop us an email, or call if you have suggestions on how we might make this presentation better.