United States · National Board Dental Hygiene Examination
Free NBDHE practice questions
All 50 original starter questions, with the answer and a rationale for every option. The same 50-question preview is what a free DHPrep account practises. Not official board items.
The preview was fixed at launch: 15 questions in Scientific Basis, 29 in Clinical Dental Hygiene Services, and 6 in Community Health/Research Principles. Items added to the US bank after that selection stayed out of the free set. Reserved mock questions are not in it.
Five of the 50 include a synthetic teaching radiograph. The image is printed with the question. The other questions are text, including patient profiles and charting. Tooth numbers are Universal.
The counts in the table are the discipline-based specifications DHPrep treats as in force (61, 115 and 24 of 200). The Candidate Guide describes a November 2026 update and does not give the day it starts. These pages follow the specifications in force. Confirm the guide you will sit with the JCNDE.
What is in the free preview
| Component | Discipline items in force | Free slots | Shown here |
|---|---|---|---|
| SB. Scientific Basis for Dental Hygiene Practice | 61 of 200 | 15 | 15 |
| PC. Provision of Clinical Dental Hygiene Services | 115 of 200 | 29 | 29 |
| CH. Community Health/Research Principles | 24 of 200 | 6 | 6 |
Choose a component
- SB. Scientific Basis for Dental Hygiene Practice
15 questions on this page · 15 in the free preview
- PC. Provision of Clinical Dental Hygiene Services
29 questions on this page · 29 in the free preview
- CH. Community Health/Research Principles
6 questions on this page · 6 in the free preview
Frequently asked questions
Are these official NBDHE questions?
No. They are original DHPrep questions written to the JCNDE topic areas. The Joint Commission on National Dental Examinations and the American Dental Association do not write or endorse these items. Use them beside the current NBDHE Candidate Guide.
How many free NBDHE questions does DHPrep provide?
Fifty. That fixed preview was chosen once, at the US launch: 15 in Scientific Basis, 29 in Clinical Dental Hygiene Services, and 6 in Community Health/Research Principles. Later practice items were not added to it. A free account practises those same 50 questions.
Do these pages include the radiograph questions?
Yes. Five of the 50 ask you to read a synthetic teaching radiograph. The image is printed with the question, the answer, and the rationale. The exhibits are original DHPrep illustrations, not patient records.
Which test specifications do these questions follow?
The specifications in force before the announced November 2026 update: 61, 115 and 24 items across the 200-question discipline component. The Candidate Guide does not publish the day that update takes effect. These pages do not guess that day. Tooth numbers use the Universal system.
Practice more with DHPrep
Create a free account to practise all 50 preview questions with a timer, notes, and bookmarks. A one-time NBDHE pass opens the rest of the US bank and the mock exams.
DHPrep is an independent preparation service. These are original practice questions, not official NBDHE items, and not a prediction of a board result. DHPrep is not affiliated with, endorsed by, or sponsored by the Joint Commission on National Dental Examinations (JCNDE) or the American Dental Association (ADA). The Canadian NDHCE has its own question set.