Patients with _______ burns should have the area irrigated with large amounts of water

A patient has severe tooth-associated pain. The tooth is sensitive to percussion. A radiograph shows only slight thickening of the apical periodontal membrane space. The tooth shows no re-sponse to electric pulp testing. This is most likely which of the following?

a. Chronic pulpitis b. Periapical granuloma c. Periapical abscess d. Periapical cyst e. Osteosarcoma

Which type of respirator system has a continuous supply of air form outside the hazard zone?

a. powered air-purifying respirator b. closed circuit breathing apparatus c. open circuit breathing apparatus d. supplied air respirator