Developed by JCNDE, and is administered at Prometric Testing Centers. NBDE II is a two day examination of 500 multiple choice questions. The day 1 exam is 8 hours and 15 minutes, and covers and consists of 400 discipline-based, multiple choice questions. The day 2 exam is 4.0 hours, and covers 100 patient case-based items to test the dental student’s ability to apply broad-based knowledge to practical clinical cases. Official NBDE 2 test results are reported as pass/fail, with scaled scores ranging from 49-99, with a minimum passing score of 75. Over the past several years, NBDE 2 pass rates hover just above 90% (99% with DENTIN's NBDE II study guide). Prepare for the NBDE II by visiting dentin.co.