CDT-CB Exam Dates 2026: Testing Windows, Deadlines & Scheduling

How the CDT-CB Testing Windows Work

The Certified Dental Technician (CDT) credential in the Crown and Bridge specialty is administered by the National Board for Certification in Dental Laboratory Technology (NBC). Unlike exams that offer unlimited walk-in appointments, NBC organizes testing into defined windows tied to application deadlines. That structure rewards candidates who plan in reverse: choose the month you want to test, then count backward to the deadline for your application, your documentation, and your preparation.

There are two kinds of dates to track, and they follow different rhythms:

• Written exam windows occur monthly, delivered as FastTest computer-based testing with MonitorEDU remote proctoring.
• Practical exam windows occur in a smaller set of months for remote testing (January, March, May, July, September and November), either at a suitable dental laboratory with MonitorEDU proctoring or at a scheduled volunteer-host group site.

This article focuses on the specialty written exam, since that is the centerpiece of CDT-CB preparation, while also explaining how the practical calendar interacts with your overall timeline. If you are still deciding whether to pursue the credential at all, our overview of what CDT-CB certification is is a useful starting point.

The Monthly Written Exam Calendar and the 20th-of-the-Month Deadline

The single most important date rule for the written exam is this: applications are due by the 20th of the month preceding your testing month. If you want to sit for the written exam in a given month, your application must be in by the 20th of the month before. A candidate aiming for a June window, for example, would work toward a May 20 submission. That one-month lead time is not optional padding; it is the mechanism that gets your eligibility reviewed and your testing authorization issued.

Written exam at a glance

Because 10 of the 90 items are unscored field-test questions, you cannot tell which ones count. Treat every question as scored. For a deeper look at how results are determined, see our guide to the CDT-CB passing score; note that NBC supplies the written passing requirement in candidate confirmation information rather than publishing a single figure in marketing materials.

Remote Practical Windows: January Through November

The practical exam is hands-on and far less flexible than the monthly written calendar. Remote practical windows run in January, March, May, July, September and November. That means six opportunities a year, spaced two months apart. If you miss a window or need to retest, the wait to the next one can be longer than the written exam's turnaround.

The practical consists of 5 hours 15 minutes of timed work plus advance preliminary work. Its focus areas are preliminary work, waxing and metalwork, including three-unit bridge preparation. Three examiners grade the work independently, and every required practical subtest must pass in the same administration. That last rule matters for scheduling: you cannot bank a passed subtest and return for only the failed one, so a rushed attempt can cost you an entire practical window.

For a candid look at how demanding the hands-on component is, read how hard the CDT-CB exam really is.

Why Eligibility Paperwork Should Be Settled Before You Pick a Date

The calendar is only useful if you are eligible to use it. NBC requires a high-school diploma or equivalent, working English, satisfactory ethical and legal standing, and an NBC-approved technical pathway. The standard pathway requires five years of documented dental-technology education, training and/or experience. Full-time employment means at least 35 hours per week, and concurrent education and employment are not double-counted, which surprises some candidates who assume overlapping years add up.

Alternate routes exist, and they all generate paperwork that has to be ready by your application deadline:

• Graduates of two-year CODA programs may qualify with two additional nonconcurrent years of practical experience.
• Current Recognized Graduates (RGs) whose qualifying examination was passed within four years need no additional experience after a two-year CODA program, or three on-the-job years after a non-CODA program.
• CE-substitution pathways are four years plus 75 CE hours, three years plus 150 hours, or two years plus 225 hours. No more than one-third may be self-study, no more than one-third qualified mentoring, and at least one-third must be qualifying NBC/ADA-CERP/AGD education.

You will need to submit education and employment records, supervisor details, CE documentation and job-task mapping. Mentorship requires a certified supervisor and an attestation. Chasing a former employer for a signature or a supervisor for an attestation is exactly the kind of delay that burns a month. Start the paperwork long before the 20th. Our full breakdown of CDT-CB requirements walks through each pathway in detail.

Sequencing the Components and the Four-Year Clock

A first-time candidate on the standard route takes three exams: the specialty written, the comprehensive written, and the practical. These initial components may be taken in any order, but all must be passed within four years of the first pass. That four-year window is a genuine scheduling constraint, particularly if you fail an exam and need to wait for a later window.

An eligible current RG examination substitutes for the comprehensive component within its own four-year allowance, which is why RGs often have a shorter path to completion.

Which order makes sense?

Because the written windows are monthly and the practical windows are bimonthly, many candidates schedule the written components first to build momentum and then target the practical in the next available window. Others prefer to complete the practical while their bench skills are sharpest and then fit the written exams in around work. Neither is wrong, but your choice should be deliberate. Existing CDTs adding the Crown and Bridge specialty take the specialty written and the practical, which keeps the sequencing simpler.

If you are trying to understand how the written and practical pieces fit into the larger credential, see our CDT-CB certification overview.

What the Written Session Requires on the Day

Once your date is set, the day itself has firm rules. Written sessions are closed-book. No outside assistance, books, dictionaries or scratch paper are permitted, and there is no scheduled break. For a 90-minute specialty exam that is manageable, but it is worth rehearsing, especially for the longer comprehensive exam at 2 hours 45 minutes.

Remote testing through MonitorEDU adds technical requirements:

• A private workspace
• A compatible computer with webcam and audio
• Reliable internet
• A smartphone camera
• Photo ID

Working Backward From Your Target Month

Once you know your target testing month, the application deadline and the content blueprint can shape your preparation calendar. The blueprint is weighted unevenly, so your study time should be too. NBC publishes percentage ranges rather than fixed weights, and it is best to keep them as ranges:

For a domain-by-domain explanation, see our complete guide to the six CDT-CB content areas. Here is one way to map a roughly eight-week runway before your application deadline and exam month:

For more on structuring your preparation, see the CDT-CB study guide, and when you are ready to test your recall, try the CDT-CB practice questions on our main site.

Retake Waits and Accommodation Lead Times

Two timing rules can quietly derail a plan if you discover them late.

Retake waiting period

Candidates who fail a written exam must wait at least 30 days before reapplying and pay a new exam fee. Combine that with the application deadline on the 20th of the preceding month, and a failed attempt can push your next realistic window out by well over a month. Curious about how often candidates face this? Our article on the CDT-CB pass rate discusses what is and is not known.

Accommodation requests

Requests for testing accommodations require supporting documentation and at least 30 days' advance written notice. If you need accommodations, file the request well ahead of your application deadline so it does not become the bottleneck for your target month.

Fees and Budgeting Around Your Dates

Timing and cost are linked because every attempt carries a fee. NBC exam fees are $275 for the specialty written, $275 for the comprehensive and $650 for the practical. That makes the standard three-exam initial route a $1,200 exam-fee subtotal, and an existing CDT adding a specialty through its written and practical exams a $925 subtotal.

These subtotals cover exam fees only. Budget separately for preparation, materials, equipment, applicable shipping, travel, renewal and retakes. Because a retake means a new exam fee, a well-timed first attempt is also the most economical one. See our complete CDT-CB certification cost breakdown for a fuller picture.

After you pass: the renewal calendar

Certification is not a one-time date. Renewal is annual and involves a renewal fee, a legal and ethical attestation and 12 CE hours: 1 in Regulatory Standards, 6 in Scientific topics (including at least 3 NBC-approved) and 5 additional allowable hours. Additional specialties do not increase the annual CE requirement. Putting the renewal cycle on your calendar from day one avoids a lapse later.

As for the payoff, the Bureau of Labor Statistics reports a $49,610 median annual wage for dental laboratory technicians as of May 2025. That is occupation-wide context, not a specialty-specific figure or a measured CDT premium. For a fuller discussion, read the analysis of whether CDT-CB certification is worth it.

Frequently Asked Questions