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

How NBC Schedules the Partial Dentures Written Exam

The Certified Dental Technician (CDT) credential in the Partial Dentures specialty is administered by the National Board for Certification in Dental Laboratory Technology (NBC). Unlike a credential that offers a handful of fixed national test dates, NBC structures its calendar around monthly written windows and bimonthly practical windows. That difference matters, because it means your real deadline is almost never the exam day itself. It is the application cutoff that precedes it.

For the specialty written component, delivery is computer-based through FastTest with MonitorEDU remote proctoring. You sit the exam from a private space you control rather than traveling to a test center. The specialty written exam contains 90 administered questions (80 scored and 10 unscored field-test items) and gives you 1 hour 30 minutes. If you want a closer look at what those 80 scored items cover, the CDT-PD exam domains guide breaks down all eight content areas.

This article focuses on timing: when you can test, when you must apply, and how to sequence the written exam, the practical, and any comprehensive exam so nothing expires on you.

The Monthly Written Calendar and the 20th-of-the-Month Rule

NBC offers written testing windows every month. The controlling rule for candidates is the application deadline: applications are due by the 20th of the month preceding the window you want. In practical terms:

• To test in a given month, your completed application and fee must be in by the 20th of the previous month.
• A late submission does not squeeze you into the current window. It rolls you to the next one.
• Because your application also triggers eligibility review, documentation problems can cost you additional time on top of a missed cutoff.

Always confirm the exact window dates for your target month in the current NBC handbook and on the NBC candidate pages before you commit, since NBC publishes the authoritative calendar and candidate confirmation details.

Remote Practical Windows: January Through November

The practical exam follows a different rhythm than the written. Remote practical windows run in January, March, May, July, September and November, so there are six opportunities a year rather than twelve. Practical testing takes place either at a suitable dental laboratory with MonitorEDU oversight or at a scheduled volunteer-host group site.

The partial dentures practical is hands-on and demanding: 5 hours 15 minutes of timed work, plus advance preliminary work you complete before the timed session. The focus areas are advance cast and framework preparation with timed design, wrought-wire clasp joining, waxing, and metal finishing. Four grading groups (preliminary work, design, waxing and metalwork) must all pass, and three examiners grade your work independently. Every required practical subtest must pass in the same administration.

Because the practical includes advance preliminary work, your working timeline starts earlier than the testing window itself. Build in time to prepare casts and framework materials, confirm your lab setup, and complete the preliminary work before the timed session. Any applicable shipping also has to fit inside that schedule.

Eligibility Comes Before the Calendar

You cannot simply pick a window and show up. NBC must approve your technical pathway before you test, so the first step of any scheduling plan is confirming you qualify. In brief, you need 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 counts as at least 35 hours per week, and concurrent education and employment are not double-counted. Alternatives exist:

• Two-year CODA program graduates may qualify with two additional nonconcurrent years of practical experience.
• Current Recognized Graduates (RGs) whose qualifying exam 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: four years plus 75 CE hours, three years plus 150 hours, or two years plus 225 hours, with no more than one-third self-study, no more than one-third qualified mentoring, and at least one-third qualifying NBC/ADA-CERP/AGD education.

Your application packet must include education and employment records, supervisor details, CE documentation and job-task mapping. Mentorship credit requires a certified supervisor and an attestation. Gathering signatures and records from past employers is often the slowest part of the process, which is why it belongs at the start of your timeline. The full breakdown lives in the CDT-PD requirements guide.

The Four-Year Clock and Choosing Your Order

Initial CDT components may be taken in any order, but they must all be passed within four years of your first pass. This is the single most important long-range scheduling rule for new candidates. It means you can start with whichever component you feel most ready for, but you should not let the clock run casually.

An eligible current RG examination can substitute for the comprehensive component within its four-year allowance, which can shorten the route for graduates who still have a qualifying RG result on the books.

Which Order Makes Sense?

• Written first: The specialty written has the lowest cost and the shortest sitting, and monthly availability makes it easy to retake if needed. It also forces you to internalize survey, design and framework logic that directly supports your practical.
• Practical first: Strong bench technicians sometimes prefer to lock in the hands-on exam while their skills are sharp, since practical windows are less frequent and require lab coordination.
• Comprehensive timing: The comprehensive is the longest written sitting (2 hours 45 minutes), so avoid scheduling it back-to-back with a practical window.

For the candidate already holding a CDT who is adding a specialty, the route is the written and practical exams for that specialty. The cost context for each route is covered in the CDT-PD certification cost breakdown.

Exam-Day Logistics for Remote Written Sessions

Scheduling is not only about the date. A remote written session has hard technical and environmental requirements, and failing them can derail an otherwise well-planned window. You need:

• A private workspace with no one else present.
• A compatible computer with webcam and audio.
• A reliable internet connection.
• A smartphone camera, used as part of the remote proctoring setup.
• Valid photo ID.

The session is closed-book. Outside assistance, books, dictionaries and scratch paper are not permitted, and there is no scheduled break. For the 90-minute specialty exam this is manageable, but for the 2 hour 45 minute comprehensive you should plan your hydration, comfort and timing before you begin, because you cannot step away.

Questions are four-option, single-best-answer multiple choice, including completion-style stems. Because the unscored field-test items are mixed in with scored ones and not identified, treat every question as if it counts.

Working Backward from a Target Window

The most reliable way to schedule is to pick a target window and build backward. Here is a sample sequence for a written exam, tied to the domains that carry the most weight. The largest domain, Survey, Design and Preparation for Framework, ranges 25-27% on NBC's outline, followed by Selection and Application of Materials and Equipment at 18-20%, so those get the earliest and longest attention.

Keep in mind these are NBC's percentage ranges, not fixed weights, so do not assume a specific question count per domain. Your CDT-PD study guide can help you adapt this eight-week frame to your own experience level, and an experienced bench technician may compress it considerably.

Count backward from your exam: finish your preparation, submit by the 20th of the preceding month, and leave margin for any documentation questions. If you are also preparing for the practical, overlay the advance preliminary work so it does not collide with written study.

Retakes, Accommodations, and Lead Times

Two rules create lead times that catch candidates off guard.

Accommodation Requests

If you need testing accommodations, you must submit supporting documentation and give at least 30 days' advance written notice. Since your application deadline falls on the 20th of the month before the window, file your accommodation request well before or alongside your application rather than after. Waiting until you have a confirmed slot may leave you without enough notice for that window.

Waiting Period After a Failed Written Exam

A candidate who fails the written must wait at least 30 days before reapplying and must pay a new exam fee. Combined with the application cutoff, a failed attempt realistically costs more than a month. Map out your best-case and worst-case calendar before your first attempt so you know whether a retake still fits inside the four-year allowance.

Fees and Budget Timing

Exam fees are paid per component: $275 for the specialty written, $275 for the comprehensive, and $650 for the practical. The standard three-exam initial route subtotals $1,200, while an existing CDT adding a specialty through its written and practical exams subtotals $925. These figures cover exam fees only. Budget separately for preparation, materials, equipment, applicable shipping, travel, renewal and any retakes.

Timing affects cost because a retake means a new exam fee, and the practical's advance preparation can involve materials and shipping expenses that arrive well before the window. If you are weighing the investment, the ROI analysis covers the broader picture. For salary context, BLS reports a $49,610 median annual wage for dental laboratory technicians in May 2025. That figure describes the occupation as a whole and should not be read as specialty pay or a certification premium.

After you certify, remember that the credential renews annually. Renewal requires a fee, a legal and ethical attestation, and 12 CE hours: 1 in Regulatory Standards, 6 Scientific (including at least 3 NBC-approved), and 5 additional allowable hours. Adding specialties does not increase the annual CE requirement. For passing-score details, see the CDT-PD passing score guide; NBC supplies the written passing requirement in the candidate confirmation information.

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