1. Prevention, management, and documentation of swallowed dental objects;Fischman;JADA,1985
2. A method to prevent swallowing or aspiration of cast restorations;Jacobi;J Prosthet Dent,1981
3. A method to prevent patients from accidentally ingesting dental devices;Harvey;J Prosthet Dent,1988
4. Using a removal loop to prevent aspiration of indirect restorations;Feit;JADA,2001