There are three main things to note when cleaning your cat’s teeth: First, before cleaning your cat’s teeth: You need to fast for 10 hours and water for 4 hours before cleaning your cat’s teeth. If the cat is an elderly cat, cardiac and other aspects of the cat should be checked before anesthesia; secondly, when cleaning teeth: During the teeth cleaning process, the cat’s head should be kept lower than the body to avoid water being inhaled into the lungs and causing foreign body pneumonia. If it is found that the cat's dental calculus has seriously caused bad teeth and loose teeth, it can be extracted directly; third, after teeth cleaning: after cleaning the cat's teeth, anti-inflammatory drugs should be used and applied locally to eliminate inflammation and restore the health of the gums.