system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does salt water help your gums heal after a deep periodontal cleaning?
gpt
Osmosis. During a deep periodontal cleaning, the water jet blasts lots of bacteria and other debris off your teeth and into your gums, creating lots of micro-abrasions in the process.

Salt water creates negative osmotic pressure, which draws water from your blood and lymph fluids through those micro-abrasions and cleans all the junk out of them. Clean wounds heal faster.