Practice Tips #115: The Midwest Tradition: A Tale of Two Turbines

The Midwest Tradition: A Tale of Two Turbines

Once upon a time, there was a handpiece and turbine company named Midwest, now owned by Dentsply Sirona. As dentists started to appreciate the convenience of auto-chuck mechanisms,u00a0Midwest decided to incorporate such a mechanism into their handpieces.

Rather than relying on the simple push button that found favor in the industry, Midwest decided to do something different. They patented a lever called the Power Leveru2122. As the user pulled on the end of the lever, the opposite end would push on the actuator to open the chuck of the turbine, so one could remove or insert a bur. This prevented the after-market from simply copying the design and providing lower cost alternatives.

The core turbine was, however, still easily copied and provided by other sources. As dentists began using these after-market turbines, they started looking to the after-market to replace old worn end caps as well. Since after-market suppliers couldnu2019t manufacture a Power Leveru2122 cap, the after-market provided push button caps instead.

These worked very well, fit the existing turbines, and addressed complaints of the lever tearing gloves (which some users experienced). Tradition autochuck handpieces now use either a lever end cap or a push button. Either way, the turbine was the same, so replacement was kept simple. One could freely move between after-market brands and the OEM.

As time went on, Midwest realized that some people preferred a push button. Enter the XGT: a new and improved version of Midwestu2019s Tradition with a thicker, more ergonomic handle. The XGT also featured a push button chucking mechanism. While the XGT had the same size head as the Tradition, it did not use the same turbine. In order to accommodate their push button cap, Midwest altered the turbine slightly, so it had two flanged bearings to properly seat into their end cap. This feature further set the XGT apart from the existing Tradition design.

Midwest Tradition Turbines

PHOTO: Original u201cLu201d style turbine (#15-95) vs XGT style turbine (#25-97)

With the success of the XGT, Midwest was then able to offer the XGT turbine and cap as a retro-fit to their Tradition handpieces, allowing conversion to a push button. Eventually, Midwest started offering the Tradition handpiece brand new with their push button cap and turbine.

Meanwhile, the after-market continued to sell and make the standard u201cLu201d type turbine, as well as push button caps to match it. By doing so, this meant that there were now TWO different u201cpush buttonu201d turbines and end caps for use with the Midwest Tradition. Currently, both designs still exist and are available. If you need a replacement turbine for a push button Midwest Tradition handpiece, you need to know the origin of your end cap.

NOTE: If the handpiece originally purchased from Midwest has a push button, it has the original XGT style cap and uses the XGT turbine. If the handpiece was converted to a push button using an after-market cap, it still uses the u201cLu201d type turbine.

PHOTO: Smooth Bearing Profile vs Flanged Bearing Profile

The distinguishing feature of the two turbines is the rear (u201cendu201d) bearing. On the original "L" turbine, it is a smooth bearing. The push button cap used with this will accept the narrow smooth bearing. The newer turbine produced by Midwest and first used on their XGT handpiece has a flanged rear bearing (with a lip). The push button cap for this turbine is made to accommodate this different bearing.

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