What is the primary reason for assessing the dental handpiece prior to polishing?

The primary reason for assessing the dental handpiece prior to polishing is to check for proper function and prevent instrument failure during a procedure. This assessment is crucial because if a handpiece malfunctions while in use, it could compromise the quality of the polishing process and pose a risk to the patient's safety. Ensuring that the handpiece operates smoothly and effectively helps prevent interruptions and maintains a professional level of care. This proactive measure allows for the identification of any issues such as wear, insufficient lubrication, or mechanical failures that could disrupt the polishing process.