Handpiece Terminology - Dental Handpiece Repair ...
Connector. Attaches the handpiece to the dental delivery unit that supplies air and water to the handpiece. There are four types of standard U.S. connectors. They include the 2, or 3-Line (also called a Borden) and 4-Line. The 4-Line (also known as a Midwest) is the most popular connector. In a 4-Line connector, the holes are (1) drive air, (2 ...
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