Chuck manufacturing lot numbers 7/15/03, 7/25/03, 8/12/03, 8/14/03; handpiece serial numbers 60007550, 60009370, 110298025 and 600000215 through 600018298. Not all units in the serial number range were affected. 388 units were repaired with the affected chucks.
Midwest XGT High Speed Handpiece with Fiber Optics and Push Button Chuck, catalog #790000; Manufactured for DENTSPLY Professional, A Division of DENTSPLY International, 901 West Oakton Street, Des plaines, IL 60018-1884 USA