The lens heat shield/holder from the dental light has a three prong locking mechanism which locks the lens heat shield/cover into place.The lens heat shield/cover has to be removed by the end user when cleaning the lens or replacing the halogen bulb during routine operator maintenance.The installation instructions, use and care instructions, and labeling clearly state to ensure the lens heat shield/holder is properly secure by snapping the part back into place.The dental light is over 21 years old and is past the expected life of the device.
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