NDHCE vs NBDHE: dental hygiene board exams

NDHCE vs NBDHE: dental hygiene board exams are often compared as if they were two versions of the same test, but they differ in length, structure, scoring and in what happens after a candidate passes. The NDHCE is the National Dental Hygiene Certification Examination used in Canada, and the NBDHE is the National Board Dental Hygiene Examination used in the United States. This article compares them using the exam bodies' own documents and asks whether the NBDHE has been replaced.

Is the NBDHE being replaced?

No replacement exam was found on the Joint Commission on National Dental Examinations (JCNDE) website. The NBDHE page describes the exam as available year round at Pearson VUE test centres, and the 2026 candidate guide (updated September 2026) still lists 350 multiple-choice items. What has changed is the content weighting. The guide states that updates to the NBDHE test specifications are anticipated in November 2026 and advises candidates to consult the NBDHE website for any change to the implementation date.

The discipline-based component remains at 200 items, but its distribution shifts. Scientific Basis for Dental Hygiene Practice falls from 61 to 56 items, Provision of Clinical Dental Hygiene Services rises from 115 to 124 items, and the community health and research area falls from 24 to 20 items. The case-based component stays at 150 items.

The confusion about replacement may come from the JCNDE's new clinical exam. The Dental Hygiene Licensure Objective Structured Clinical Examination (DHLOSCE) is a separate, computer-delivered OSCE. The JCNDE describes it as a clinical licensure exam that does not require live patients, taken at Prometric centres, and lists Arizona, Kentucky and Oregon as states that accept it toward clinical requirements.

Exam format and structure

The NDHCE is developed and administered by the Federation of Dental Hygiene Regulators of Canada (FDHRC). Its 2026 blueprint describes a fully computer-based exam of 200 questions given over four hours, in two sections of 100 questions with two hours each. Of the 200 questions, 170 are scored and 30 are experimental and unscored. A 15-minute health break separates the sections, and once the first section is submitted a candidate cannot return to it.

Items appear either as independent questions or as case-based sets. Each case carries a minimum of four to six items attached to a brief client scenario. In the scored portion, 70 to 80 percent of items are independent and 20 to 30 percent are case-based. Items can include radiographs, photographs and dental charts.

The NBDHE is run by the JCNDE, an agency of the American Dental Association, and delivered by Pearson. It has a discipline-based component of 200 items and a case-based component of 150 items drawn from 12 to 15 patient cases. The administration schedule places 200 discipline-based questions in Session One, with 3 hours 30 minutes allowed, and about 150 case-based questions in Session Two, with 4 hours allowed. Answering time is 7 hours 30 minutes, within nine hours of total administration time.

Eligibility and accredited programs

NDHCE candidates apply online when registration opens, submit a passport-style photo and pay the fees. After registration closes, the FDHRC contacts the program director or coordinator of the graduating institution to confirm eligibility. The FDHRC also performs substantial equivalency assessments, which are required for graduates of non-accredited dental hygiene programs.

NBDHE candidates apply to the JCNDE. A student in a dental hygiene program accredited by the Commission on Dental Accreditation (CODA) becomes eligible when the program director certifies it, and a graduate must provide evidence of graduation. The guide notes that all US jurisdictions accept graduation from a CODA-accredited program, and that most also accept graduation from a Canadian program accredited by the Commission on Dental Accreditation of Canada (CDAC).

Scoring, results and retakes

The FDHRC reports that NDHCE scoring takes four to six weeks, with unofficial results posted no sooner than four weeks after the exam and official results sent within six weeks. The FDHRC overview reports a 2025 pass rate of 87.1 percent across 2,165 candidates. Candidates who do not pass receive a performance profile and have up to three attempts.

The NBDHE is criterion-referenced and reports only pass or fail. Scale scores run from 49 to 99, and 75 is the minimum passing score. Under the Five Years/Five Attempts rule, a candidate must pass within five years of the first attempt or within five attempts, whichever comes first, and afterward may test once every six months.

Clinical exams, registration and portability

In Canada, passing the NDHCE is required for registration with regulators in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, and the territories. The FDHRC states that the exam facilitates portability between provinces. After a pass, the candidate contacts the relevant regulator to complete registration.

In the United States, licensure belongs to individual jurisdictions. The JCNDE guide says most jurisdictions have three basic requirements: an educational requirement, a written exam requirement and a clinical exam requirement. The NBDHE is intended to fulfil or partly fulfil the written requirement, and acceptance is entirely at each jurisdiction's discretion. Clinical exam options vary by state and may now include the DHLOSCE where a board has approved it. Portability therefore depends on whether the receiving state accepts the result.

A pointer for programs

ngnsimulation offers unscripted AI patient encounters inside an EHR-style chart, including spoken OSCE practice, along with adaptive study and quizzing with a placement check, faculty-facing competency analytics, and operation alongside an existing LMS. The free licensure map at the licensure map covers 57 roles across 64 jurisdictions, and programs can look at the pilot process or the demo for more detail.