There is a something of a mystery relating to micromotor driven speed increasing contra-angles. In most of Europe dentists have embraced this technology for years and the vast majority of them wouldn’t think of going back to an air turbine. Only in recent years has the speed increasing contra-angle been considered by clinicians in the UK and this usually when they have a new surgery set up.
Speed and torque
The most amazing change that clinicians find when they try a speed increasing contra-angle is the consistent level of torque. Couple this with fully adjustable bur speeds and you have a level of control to deliver dentistry of the highest level.
Electrically driven contra-angles deliver constant torque, operating at speeds of between 10rpm and up to 200,000 rpm, depending on the specific contra-angle gear ratio. The bur will not stop or slow down, no matter what material is being cut, through all the speed ranges, and even at relatively slow speeds an electric micromotor and contra-angle will cut tooth structure with precision and control. Stuart C Campbell BDS MFDS RCS (Edin) comments, “I have been using a high speed electric handpiece for the past 5 years and would consider the instrument indispensable. I would strongly recommend the use of a micromotor and electric high speed handpiece to all clinicians at any stage of their careers.”
Forget bur chatter
Chatter is caused by bur wobble, caused by ball bearing wear in the air turbine, which is supported by O-rings. The older the bearings, the more the bur can wobble. An electric micromotor and contra-angle provides greater bur concentricity because the electrically driven contra-angles rely on solid gear-to-gear contact and rigid bearing support, meaning the bur does not wobble and chatter is eliminated. This results in a truer, more definite cutting instrument, which allows clinicians to routinely produce more precise margins faster with much less effort. Neel Jaiswal, Dentist, BDS MFGDP comments, “I have a built-in micromotor and use the NSK Ti-Max Z95L speed-increasing (1:5 increasing contra-angle) which is exceptionally durable with minimal noise output and although I have turbines, I don’t use them and I much prefer my speed increasing handpiece as it offers so many advantages in terms of delivering high quality work”. Neel goes on to comment, “We do a lot of microscope and close magnification work in the practice and I find the Ti-Max Z95L operates with very little vibration and delivers a level of control not replicable with a turbine. Additionally, the Ti-Max Z95L has a very small head and neck, which can be very useful in tight spaces and when trying to deliver very fine work, as you can see what you’re doing more easily”.
But aren’t they “heavy”?
Many clinicians are under the impression that the combination of electric micromotor and speed increasing contra-angle will be heavy and that the weight of the micromotor in combination with the contra-angle will ‘drag’ and cause hand and wrist strain. The latest versions of these instruments have been designed of be lightweight and perfectly balanced, ideal for using for extended periods of time without causing strain. In addition they are quiet and vibration-free a benefit for both clinician and patient. Dr Joe Oliver BDS (Lond) LDSRCS (Eng) comments, “The NSK Ti-Max Z95L is lightweight and perfect for delivering fine margins or MI preparations as the design offers improved visibility through the reduction of head and neck size, and it runs with almost no vibration. I would not hesitate to recommend it. I have a Kavo treatment centre in my surgery and the NSK handpieces with the Kavo coupling fit and work together perfectly”.
Making the switch is easy
Some clinicians go through a slight learning curve when adopting the combination of a micromotor and speed increasing contra-angle, which is mainly due to the increased torque and cutting power delivered. However, the benefits including improved productivity, greater precision, and less physical and mental fatigue are all worth this small inconvenience.
Occasionally clinicians are also under the misunderstanding that they need to change their treatment centre to adopt an electric micromotor set-up. However, electric micromotors can be quickly retrofitted by an experienced engineer to an existing treatment unit. Dan Hines BDS comments, “Converting to electric is relatively easy, and contrary to the myth, practices do not need to wait until they purchase a new treatment centre. I bought my electric set up when I opened my surgery and have a Belmont Cleo, with an integrated NSK MultiPad control unit. The NSK Multipad can be fitted to the side of most carts by a qualified engineer in a couple of hours, so it is relatively easy to adopt this technology”.
If you would like to explore the world of electric micromotors and speed increasing contra-angles the best way forward is to trial this combination in practice. NSK offer a no obligation 10-day ‘try before you buy’ scheme which offers a selection of NSK’s most popular products including NSK NLX portable micromotor and the NSK Ti-Max Z95L contra-angle giving clinicians the opportunity to try a new combination of equipment before committing to rental or purchase.
NSK - Unrivalled performance
The NSK Ti-Max Z95L is the latest speed increasing (1:5 increasing) contra-angle, which offers improved visibility through the reduction of head and neck size and benefits from a lightweight titanium body. The handpiece is exceptionally durable with minimal noise output, which patients really appreciate and it offers many advantages in terms of delivering high quality work.
MultiPad Electric Micromotor & Integrated Ultrasonic Control Pad - With a user-friendly LCD display and interface, NSK’s MultiPad uniquely enables control of the NLXnano and NLX plus electric micromotors and the Varios 170 ultrasonic scaler - all in one system. When partnered with MultiPad, the NLXnano reaches speeds of 1,000 - 40,000 min-1 and delivers a powerful 3.4Ncm torque, whilst the NLX plus offers 3 user-friendly endo modes; auto-reverse on, auto-stop and auto-reverse off. NSK’s MultiPad can also be used to control all functions of the Varios 170 ultrasonic scaler.
To take advantage of NSK’s ‘Try before you buy’ scheme or for more information about their products and rental scheme, contact NSK on 0800 634 1909 or your preferred dental dealer.