- What This Credential Is (and Isn't)
- Exam Format at a Glance
- Fees and Money Math
- Eligibility Snapshot
- The Seven Domains and Their Weights
- Domain-by-Domain Must-Know Topics
- Practical Exam Facts
- Rules, Clocks, and Deadlines
- Renewal in One Glance
- Scheduling Your Review by Domain
- Frequently Asked Questions
- The Complete Dentures specialty written exam has 90 delivered questions (80 scored, 10 unscored) in 1 hour 30 minutes.
- Select and Arrange Artificial Teeth carries the largest weight range at 16-18%; Record Base Plate & Occlusal Rim is the smallest at 5-7%.
- Every Practical subtest must pass in the same administration, and all required exams must pass within 4 years of your first pass.
- Standard total fees calculate to $1,200: Comprehensive $275, Specialty Written $275, Practical $650.
What This Credential Is (and Isn't)
This page is a fast-reference sheet for the Certified Dental Technician credential with the Complete Dentures specialty, issued by the National Board for Certification in Dental Laboratory Technology (NBC). The official credential is the CDT with a Complete Dentures specialty. "CDT-CD" is the identifier we use on this site; it is not a verified official postnominal, so avoid putting it on a resume or business card as though NBC prescribes it.
If you need background before diving into numbers, start with our explainers on what CDT-CD is and what CDT-CD stands for. For a deeper walk through preparation strategy, pair this sheet with the CDT-CD study guide.
Exam Format at a Glance
The pathway has two written components plus a hands-on Practical. Written exams are delivered through FastTest (Assessment Systems) with MonitorEDU remote proctoring. The Practical is arranged by NBC, either as group/host laboratory testing or as a remote laboratory sitting.
| Component | Delivered Questions | Scored / Unscored | Time |
|---|---|---|---|
| Comprehensive Written | 170 | 160 / 10 | 2 hours 45 minutes |
| Complete Dentures Specialty Written | 90 | 80 / 10 | 1 hour 30 minutes |
| Practical (hands-on) | Subtests (task-based) | Every subtest must pass | Up to 5 hours 15 minutes, plus preliminary fabrication |
Question style
- Written items are multiple choice with four options and one best answer.
- "Best answer" means more than one option may sound plausible; you are choosing the most correct clinical or laboratory response.
- Ten questions on the specialty exam and ten on the Comprehensive are unscored pretest items. You will not know which ones, so treat every question seriously.
- Written exams are closed-book, remotely proctored, with no breaks. Whether a personal calculator is allowed and whether the exam uses adaptive rules are not verified, so confirm in the current handbook.
The Exam line on this sheet describes the Specialty Written component only. For a realistic sense of difficulty across all components, see how hard the CDT-CD exam is.
Fees and Money Math
| Item | Fee |
|---|---|
| Comprehensive Written | $275 |
| Complete Dentures Written Specialty | $275 |
| Practical | $650 |
| Calculated standard total | $1,200 |
- Eligible RG routes and existing-CDT added-specialty routes can differ from the standard total, so confirm your route before budgeting.
- Materials, optional preparation resources, shipping, and any $100 articulator rental are extra and are not in the $1,200 figure.
- Remote Practical candidates should budget for return shipping of their completed work.
For a line-by-line view of what total cost looks like in practice, see the CDT-CD certification cost breakdown, and weigh it against career impact in the ROI analysis.
Eligibility Snapshot
NBC eligibility has general requirements and a technical-experience route. General requirements include English proficiency, a high-school equivalent education, and ethical and legal standing. The technical route can be satisfied in several ways:
- Standard route: 5 years of qualifying technical experience.
- Education alternatives: CODA program graduates and current Recognized Graduate (RG) pathways have alternative routes.
- Experience plus continuing education: CE can substitute for experience at 75 hours per substituted year, subject to NBC limits.
Employment documentation is required, and a mentorship attestation may be required depending on route. Our CDT-CD requirements guide walks through qualification scenarios in more depth.
The Seven Domains and Their Weights
The March 1, 2026 handbook revision retains the linked 2016/2017 specialty outline, so the seven domains below remain the framework for the Complete Dentures specialty.
| # | Domain | Weight |
|---|---|---|
| 1 | Create Master Casts from Stock and/or Custom Tray Impressions | 15-17% |
| 2 | Design and Manufacture Record Base Plate & Occlusal Rim | 5-7% |
| 3 | Select and Arrange Artificial Teeth | 16-18% |
| 4 | Process the Denture | 14-16% |
| 5 | Finish & Polish Complete Denture | 15-17% |
| 6 | Procedures for Repairs and Alterations for Complete Dentures | 13-15% |
| 7 | Selection and Application of Materials and Equipment for Removable Prosthetics | 14-16% |
Domain-by-Domain Must-Know Topics
Domain 1: Create Master Casts from Stock and/or Custom Tray Impressions (15-17%)
Everything downstream depends on cast accuracy, so expect questions on evaluating impressions and pouring correctly.
- Distinguishing stock-tray from custom-tray impression handling and what each means for the cast
- Recognizing impression defects that require return to the clinician versus defects you can work around
- Boxing, pouring, and trimming to preserve anatomical landmarks such as border extensions and the postdam area
- Stone selection and handling for dimensional stability
Domain 2: Design and Manufacture Record Base Plate & Occlusal Rim (5-7%)
The smallest domain, but foundational for jaw relation records.
- Record base materials and how each affects fit and stability
- Occlusal rim height and contour as a guide for later tooth positioning
- Relieving undercuts and ensuring the base seats without rocking
Domain 3: Select and Arrange Artificial Teeth (16-18%)
The heaviest-weighted domain. Expect scenario-based items that ask for the best arrangement decision, not just definitions.
- Tooth selection factors: mold, shade, and material choices in relation to the arch and patient characteristics
- Setting anterior and posterior teeth to support esthetics, phonetics, and function
- Occlusal schemes and how arrangement supports stability of the finished denture
- Using the clinician's records and prescriptions to guide setup decisions
Domain 4: Process the Denture (14-16%)
Flasking, packing, and curing are where processing errors become fit and occlusion problems.
- Flasking and investing procedures and why they matter for dimensional accuracy
- Wax elimination, resin selection, packing technique, and cure cycles
- Recognizing causes of porosity, distortion, and tooth movement during processing
- Remounting and correcting processing changes in occlusion
Domain 5: Finish & Polish Complete Denture (15-17%)
Finishing is more than shine; it protects the tissue-bearing surface and the clinician's adjustments.
- Contouring the polished surfaces for tissue health and cleansability
- Protecting the intaglio surface and border thickness during finishing
- Abrasive and polishing sequence and heat control to avoid warping resin
- Final inspection criteria before delivery
Domain 6: Procedures for Repairs and Alterations for Complete Dentures (13-15%)
Real-world lab work is full of repairs, so this domain tests practical decision-making.
- Repairing fractures and replacing teeth while maintaining alignment
- Relines and rebases: when each applies and how the process differs
- Choosing repair materials compatible with the existing denture base
- Maintaining occlusal relationships through alteration procedures
Domain 7: Selection and Application of Materials and Equipment for Removable Prosthetics (14-16%)
A knowledge-of-materials domain that cuts across every other area.
- Properties and appropriate uses of denture base resins, teeth, stones, and duplicating or separating materials
- Equipment selection, operation, calibration, and safe use
- Infection control and material handling principles in the laboratory
- Troubleshooting material-related failures
These topic lists are study prompts, not an official item bank. Use the official NBC handbook outline as the source of truth and use our practice tests to see how these concepts appear in best-answer format.
Practical Exam Facts
- Time: up to 5 hours 15 minutes of hands-on testing, plus preliminary fabrication completed beforehand.
- Delivery: NBC-arranged group/host laboratory testing or remote laboratory testing.
- Subtest rule: every Practical subtest must pass in the same administration. Passing some subtests and failing others does not bank the passed ones within a single sitting.
- Remote requirements: one sitting, one location, continuous camera coverage, your own laboratory equipment, and return shipping of work.
- Possible extra cost: a $100 articulator rental is noted as an optional extra, outside the $650 Practical fee.
Key Takeaway
Because every subtest must pass in the same administration, the Practical rewards consistency across all tasks rather than excellence in a few. Rehearse the entire sequence under timed conditions, including the setup and cleanup you will be doing on camera if you test remotely.
Rules, Clocks, and Deadlines
- Four-year window: all required exams must pass within 4 years of your first pass. Plan your sequence so a delay in one component does not threaten the earlier ones.
- Written exam conduct: closed-book, remotely proctored, no breaks. Prepare your room, hydration, and timing strategy before test day.
- Historical benchmarks only: in 2018, the Complete Dentures written exam shows 77.50% (62/80) and the Practical shows 64.10% (50/78). These are historical figures, not current or first-attempt pass rates, so do not treat them as predictions. See what the pass rate data shows and the passing score guide for appropriate context.
- Scheduling: confirm current testing windows and deadlines through NBC and our exam dates guide.
Renewal in One Glance
| Renewal Element | Requirement |
|---|---|
| Frequency | Annual |
| Ethics | Attestation |
| Fee | Required each renewal |
| CE total | 12 hours |
| CE breakdown | 1 Regulatory, 6 Scientific, 5 additional eligible hours |
Scientific CE hours must meet NBC's approval conditions, so verify a course qualifies before you pay for it. Holding multiple specialties does not multiply the renewal requirement; the same annual obligation covers them.
Scheduling Your Review by Domain
Use the weights to decide where review time goes. This simple eight-week outline front-loads the foundational domains whose errors cascade into later steps, and saves materials and equipment for the end because it ties the rest together.
Casts and Record Bases (Domains 1 and 2)
- Impression evaluation and cast preparation, then base and rim design
- Small Domain 2 can be covered in a few focused sessions
Tooth Selection and Arrangement (Domain 3)
- Largest weight range, so give it the most practice questions
- Link every arrangement decision to esthetics, phonetics, and function
Processing and Finishing (Domains 4 and 5)
- Trace a denture from flasking through polish, noting where defects originate
Repairs and Materials (Domains 6 and 7)
- Repair and reline decision scenarios, then materials and equipment review
- Finish with mixed timed sets under closed-book, no-break conditions
If you want a fuller preparation roadmap, the first-attempt study guide expands on this approach, and the CDT-CD training overview covers learning resources.
Frequently Asked Questions
The specialty written exam delivers 90 questions: 80 scored and 10 unscored. You have 1 hour 30 minutes, and each item has four options with one best answer.
The calculated standard total is $1,200: $275 for the Comprehensive, $275 for the Complete Dentures Written Specialty, and $650 for the Practical. Materials, optional preparation, shipping, and any $100 articulator rental are extra, and RG or added-specialty routes can differ.
Select and Arrange Artificial Teeth carries the largest range at 16-18%. Create Master Casts and Finish & Polish follow at 15-17% each, while Record Base Plate & Occlusal Rim is smallest at 5-7%.
All required exams must be passed within 4 years of your first pass, and every Practical subtest must pass in the same administration. Plan your sequence carefully so retakes do not push you past the window.
Renewal requires an ethics attestation, a fee, and 12 CE hours: 1 Regulatory, 6 Scientific, and 5 additional eligible hours. Scientific hours must meet NBC's approval conditions, and multiple specialties do not multiply the requirement.
For career context after certification, explore CDT-CD jobs and the salary guide, and keep sharpening recall with the CDT-CD practice tests.