The lens heat shield/holder from the dental light has a three prong locking mechanism which locks the lens heat shield/holder into place.The lens heat shield/holder 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 dentist was unable to locate the serial number of the device but said the marus light was installed in march 1999.The light is over 16 years old and is past the expected life of the device.
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