• To create a pollution-free, moisture-free oral working environment, improve access and visibility, dental assistants can observe their surgical site more clearly;

• Sterile control, isolation of treatment teeth, to obtain dry, clean sterile treatment area;

• Protect the patient from swallowing dental debris, pulp cleanses, corrosive fluids or other small instruments;

• Better cooperate with a large number of root canal irrigation, avoid the stimulation of the oral mucosa by the rinse fluid, save the time of disinfection and isolation, and reduce the pain during operation;

• Protect dental assistants from infection caused by blood and saliva from patients during splatter operations.

        Use abstract: 

        After using positioning plate to determine the punching location, use punch plier to punch holes on the sheet, set up bow of suitable clamp, flip sheet, expose clamp, folding up clamp with forceps, look under fixed in the isolated tooth neck, then pull dam under set into the isolated tooth neck, with stents open sheet, continue subsequent operations. When completed, remove the sheet.