Shauna Sand -- Takes 6 Studs ... Orally!

Shauna Sand likes putting inanimate objects in her mouth ... diamond studs.

With the help of New York dentist Dr. Dean Vafiadis holding back her luscious plump lips, the 41-year-old mother of three showed off her shiny new grill Wednesday in Manhattan.

While she claims her ex-husband Lorenzo Lamas owes her over $42K in child support, the Lucite-heel wonder still managed to scrape together enough for the ridiculous dental jewelry. In her defense, it was pretty cheap ... $60 a tooth.

With her mouth full of bling, let's hope she's careful swallowing.