Will rinsing with salt water prevent me from getting a dry socket after wisdom teeth removal?

No: It may actually cause the dry socket. Dry sockets occur when the blood clot that forms in the extraction site dislodges. When that happens. The bone becomes exposed to saliva and air, and it can be very painful. Rinsing and gargling will only increase your chances.

Dry socket: Dry socket is when the clot that forms in the socket after a few days, comes out. You want to keep the area clean and be gentle. Warm salt water rinses are a great cleanser and healer. To prevent loss of the clot use no suction, heavy spitting or heavy brushing for a week or so. No hot liquids for the first 24 hours and keep the area clear of small granular foods. No aspirin.