To register for the assessment login to your online profile. Following registration, participants will receive a correspondence by the NDEB to let them know they can schedule their assessment with Prometric.


If you to withdraw from the ACJ, you must contact the NDEB office at and not the Prometric centre. Once your withdrawal request is submitted, the NDEB will communicate with Prometric to cancel your registration. For information about withdrawal fees, visit the fees page.

Format and Content


The ACJ consists of two books. Each book contains a combination of 60 single-answer and multiple-answer multiple choice questions.

The ACJ Protocol provides specific details regarding the format and scheduling of the assessment.


Book 1 - Diagnosis, Treatment Planning and Clinical Decision Making
This component contains single answer and extended match type questions that evaluate your ability to formulate a diagnosis and to make clinical decisions.  Case histories, dental charts, photographs, and radiographic images may be provided for patients of all ages.

Book 2 - Radiographic Interpretation
Using radiographic images, this extended match multiple choice component evaluates radiographic interpretation and diagnosis.

ACJ Blueprint Approximate % of Questions
Diagnosis, Treatment Planning, and Clinical-Decision Making in:
Pharmacotherapeutics, Medically-Complex Patients, Medical Emergencies 22
Oral Medicine/Oral Pathology, Oral Surgery 28
Periodontics 22
Endodontics 10
Orthodontics, Pediatric Dentistry 10
Restorative Dentistry 8
Total 100

Sample Questions

The following examples illustrate the format of assessment questions.

Single correct Answer

Some questions have one correct answer, indicated by the direction “Select ONE correct answer”. Select the most likely answer or the most appropriate answer.

Question: 1 (Select ONE correct answer.)
Orthodontic treatment (dental and/or skeletal) for this patient


  1. is not required at this time.
  2. should be initiated during the primary dentition.
  3. should be initiated during the early mixed dentition (after eruption of the first permanent molars and incisors).
  4. should be initiated during the late mixed dentition prior to the pubertal growth spurt.
  5. should be initiated immediately following the eruption of the permanent second molars.
  6. should be initiated after the completion of growth.

One or More Correct Answers

Some questions have one or more correct answers, indicated by the direction “Select ONE OR MORE correct answers”. Select all answers that are correct.  The maximum score for any question is one (“1”). The minimum score for any question is zero (“0”). Part marks will be awarded if some, but not all correct answers are selected, provided no incorrect answer is selected.  Marks will be deducted for incorrect responses, but no question will receive a score less than zero (“0”).  Some answers are neither definitely correct nor incorrect and have been given a value of zero (“0”). Selecting one of these answers will not affect the score given to a participant. But, if a definitely incorrect answer is selected the participant will receive a zero (“0”) score for the entire question.

Question: 2 (Select ONE OR MORE correct answers.)
There is radiographic evidence of caries on the


-1 A. distal of tooth 2.3.
-1 B. mesial of tooth 2.4.
-1 C. distal of tooth 2.4.
.3 D. mesial of tooth 2.5.
.3 E. distal of tooth 2.5.
.4 F. mesial of tooth 2.6.
0 G. distal of tooth 2.6.
0 H. mesial of tooth 2.7.
-1 I. distal of tooth 2.7.
-1 J. mesial of tooth 2.8.
0 K. distal of tooth 2.8.


The NDEB updates examination and assessments questions on a regular basis as new knowledge becomes available.


The NDEB is aware that the American Academy of Periodontology (AAP) has published a new disease classification in the Journal of Periodontology in June 2018. All NDEB examinations and assessments for 2018, the February 2019 AFK, the March 2019 Written Examination and OSCE, the May 2019 ACJ, the May 2019 Written Examination and OSCE will continue to be based on the 1999 AAP disease classification. 


NDEB examinations and assessments use the terminology adopted by the American Association of Endodontists (AAE) in 2009.


The NDEB is aware of the most current guidelines for antibiotic prophylaxis as published in North America and in the reference texts used by Canadian Dental Programs.

ACJ Protocol

The protocol contain important information regarding the ACJ. This document should be read carefully.

Download the 2018 ACJ Protocol in PDF format.


Assessment results are electronically scanned and processed. Results are then verified manually at least three times. An additional verification is done of all results close to the passing score before they are released to participants.

A test equated, re-scaled score of 75 or greater is reported as a Pass. A test equated, re-scaled score of less than 75 is reported as a Fail. Results will include the test equated, re-scaled score. No further breakdown of results is available.

Passing Standard

In order to ensure the consistency of scores on all the versions of the assessment, the NDEB uses a test equating procedure. This procedure correlates a standardized reference assessment with the current version of the assessment and determines the standardized mark. The NDEB maintains a standardized passing score of 75 on all assessments and examinations. 

For more information regarding the processes used to select questions and analyze and test equate assessments and examinations please download Information Regarding Test Equating

Participants can take the ACJ a maximum of three times.

Appeals and Rescores

Compassionate Appeal

What is a Compassionate Appeal?

If you feel you were disadvantaged by a personal circumstance beyond your control during an Assessment. You can make a request for a Compassionate Appeal to the NDEB. Compassionate Appeals must be received in writing within one week of the Assessment.

Where can I find more information?

For detailed information regarding the Compassionate Appeal Process view the NDEB By-laws & Policies regarding Assessments and Examinations.

Manual Rescore

What is a manual rescore?

Two NDEB staff members perform a manual rescore by comparing the answers on your answer score sheet with the master score sheet. In most circumstances, this process confirms that no errors were made during the scanning and electronic scoring process. Participants are notified of the result of their manual rescore by email within four weeks from the time of request.

How do I request a manual rescore of my assessment?

Manual rescores are available to participants who have failed the assessment. Although it is unlikely that a result will change after a manual rescore, eligible participants can request a manual rescore of their assessment within three months of the release of results.  Manual rescores are requested through the “Other Services” tab in your NDEB online profile.

Participants cannot review their assessments or scoresheets.