- How the Seven-Domain Blueprint Works
- Domain Weights at a Glance
- Domain 1: Master Casts
- Domain 2: Record Bases and Occlusal Rims
- Domain 3: Select and Arrange Artificial Teeth
- Domain 4: Process the Denture
- Domain 5: Finish and Polish
- Domain 6: Repairs and Alterations
- Domain 7: Materials and Equipment
- Written Exam vs. Practical: Where Each Domain Shows Up
- Sequencing Your Prep by Domain
- Frequently Asked Questions
- The Complete Dentures specialty blueprint has seven domains; Select and Arrange Artificial Teeth carries the widest range at 16-18%.
- The specialty written exam delivers 90 questions (80 scored, 10 unscored) in 1 hour 30 minutes, four options each.
- Domains 1, 3, 4, 5, 6 and 7 each fall between 13% and 18%, so no single area can be skipped.
- Record base and occlusal rim work is only 5-7% of the blueprint but feeds directly into the hands-on Practical.
How the Seven-Domain Blueprint Works
The Certified Dental Technician credential in the Complete Dentures specialty is administered by the National Board for Certification in Dental Laboratory Technology (NBC). The specialty content outline divides the discipline into seven domains that follow the physical workflow of a complete denture: from casts, to record bases, to tooth setup, to processing, to finishing, with repair work and materials knowledge rounding out the picture.
That workflow structure is useful. Rather than memorizing seven unrelated lists, you can picture a single denture moving through your laboratory and ask, at each stage, what decisions a technician makes, what can go wrong, and what the correct corrective action is. Written items are four-option, one-best-answer questions, so the exam rewards judgment about the best choice among plausible alternatives, not just recall of isolated facts.
A note on the outline itself: the March 1, 2026 handbook revision retains the linked 2016/2017 specialty outline. If you are comparing study materials of different vintages, confirm against the NBC handbook before assuming a topic is in or out. For a broader view of how the whole certification fits together, see our overview of what CDT-CD certification is.
Domain Weights at a Glance
Weights are published as ranges, not fixed percentages. The ranges below are the figures to plan around.
| Domain | Name | Weight Range |
|---|---|---|
| 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% |
Two observations stand out. First, the distribution is unusually flat: six of seven domains sit in a band between 13% and 18%. Candidates who rely on a "strong area" strategy tend to be exposed, because there is no heavyweight domain that can absorb weakness elsewhere. Second, Domain 2 is the clear outlier at 5-7%, which tempts people to skim it. Resist that, for reasons covered below.
Domain 1: Create Master Casts from Stock and/or Custom Tray Impressions (15-17%)
Everything downstream depends on the accuracy of the master cast, which is why this domain carries a heavy range. The title itself signals two entry points: stock tray impressions and custom tray impressions. Expect questions that require you to evaluate an impression, decide whether it is acceptable, and explain how handling choices affect the finished cast.
What candidates must be able to do
Evaluate incoming impressions critically, then pour, trim and finish casts that faithfully reproduce the anatomy the denture will rely on.
- Recognize impression defects (distortion, voids, incomplete borders, tray exposure) and know when a remake is the right call versus when it can be worked with
- Understand the practical differences in working from stock versus custom tray impressions, including border detail and how that affects cast reliability
- Select and handle gypsum products correctly, including proportioning, mixing and setting behavior
- Pour and trim casts so landmarks, borders and vestibular detail remain usable for later steps
- Prepare and, where appropriate, box impressions to preserve peripheral anatomy
A common trap on the written side is answering as if the cast exists in isolation. Questions often hide the real issue upstream, in the impression, so train yourself to ask "what was the root cause?" before choosing the corrective step.
Domain 2: Design and Manufacture Record Base Plate & Occlusal Rim (5-7%)
This is the smallest domain by weight, but it is a foundation domain. The record base and occlusal rim are the instruments a clinician uses to capture jaw relationships, and their quality determines whether the later tooth arrangement can be trusted.
High-value points
Know what makes a record base stable, accurate and clinically usable, and how the occlusal rim is shaped and oriented.
- Material options for record bases and the tradeoffs among them
- Extension and adaptation of the base to the master cast, and why stability matters during jaw relation records
- Occlusal rim dimensions, contour and orientation, and why they matter to the clinician
- Relief and block-out considerations before base fabrication
Domain 3: Select and Arrange Artificial Teeth (16-18%)
This is the heaviest domain, with the widest range on the blueprint. It combines selection decisions (what teeth, in what size, shape and material) with arrangement decisions (where and how they are positioned relative to the ridge, the rim and the opposing arch).
Selection
Choosing teeth is a decision tied to the prescription, the patient's anatomy and the occlusal scheme.
- Matching tooth size, form and shade to the case information provided
- Understanding material differences among denture tooth types and what each implies for wear, bonding and function
- Reading and following prescription details precisely
Arrangement
Arrangement questions test whether you can place teeth to support function, stability and appearance together.
- Positioning anterior and posterior teeth relative to the ridge, midline and occlusal plane
- Establishing a stable, balanced occlusion appropriate to the chosen scheme
- Recognizing and correcting arrangement errors such as improper overjet, overbite or plane orientation
- Evaluating a completed setup before the denture moves on to processing
Because this domain is both heavy and judgment-driven, it rewards deliberate practice with scenario questions. Read each stem for the clinical detail that changes the answer: a ridge relationship, a stated occlusal scheme, or a patient need that constrains the setup. Our CDT-CD study guide shows how to build that habit into a full preparation plan.
Domain 4: Process the Denture (14-16%)
Processing converts the wax setup into acrylic. The technical risks here are dimensional: how materials flow, cure and shrink, and how the denture's fit and occlusion survive the conversion.
Topics to master
Understand each step from flasking to deflasking, along with the failure modes that show up when a step is rushed or mishandled.
- Waxing up, sealing and flasking considerations, including investing technique
- Wax elimination, tooth and base material packing, and the consequences of under- or over-packing
- Curing methods and their characteristics, and how cycle choice affects the result
- Recognizing processing defects such as porosity, incomplete adaptation, tooth movement and occlusal discrepancies, along with their likely causes
- Remounting and correcting processing changes in the occlusion before finishing
Cause-and-effect questions are especially common here. When a stem describes a defect, work backward to the process step most likely to have produced it, then choose the answer that addresses that step instead of treating the symptom.
Domain 5: Finish & Polish Complete Denture (15-17%)
Finishing is where technical quality becomes visible and tissue-friendly. This domain weighs nearly as much as Domain 1, so it is far from a cosmetic afterthought.
What the domain covers
The goal is a denture that is smooth where tissue contacts it, correctly contoured where lips, cheeks and tongue interact with it, and polished without altering fit.
- Trimming and contouring the denture base, including the polished surfaces that interact with surrounding musculature
- Selecting abrasives and polishing agents in a logical sequence and understanding why sequence matters
- Protecting the fitting surface and borders from unintended alteration during polishing
- Gingival contouring and stippling considerations for a natural, cleansable result
- Final inspection for defects, sharp edges, residual flash and occlusal accuracy
- Equipment and safety practices during finishing, including heat generation and material handling
Domain 6: Procedures for Repairs and Alterations for Complete Dentures (13-15%)
Not every denture is made new. Repairs and alterations make up a meaningful slice of laboratory work and a corresponding slice of the exam. This is also where candidates with strong fabrication experience but limited repair exposure can lose points.
Typical repair and alteration topics
Questions ask you to choose the correct approach for a given problem, accounting for materials, fit and clinical outcome.
- Fracture repairs, including preparation of the break surfaces, alignment and material selection
- Replacing or adding teeth and ensuring they integrate with the existing occlusion
- Relines and rebases: the distinction between them, the procedures involved, and effects on vertical dimension and occlusion
- Adding to or modifying a denture to adapt to changes in the patient's mouth
- Bonding compatibility between new and existing acrylic, and how polymerization method affects the repair
Domain 7: Selection and Application of Materials and Equipment for Removable Prosthetics (14-16%)
This domain is the cross-cutting knowledge layer. Where Domains 1 through 6 are organized around steps, Domain 7 is organized around the materials and equipment used across those steps, and it applies to removable prosthetics broadly, not only to complete dentures in isolation.
Areas of emphasis
Know what each material is, what it is for, how it behaves and how to handle it safely and correctly.
- Gypsum, waxes, acrylic resins, investing and separating materials, and denture tooth materials: their properties and appropriate uses
- Manufacturer-directed handling such as ratios, working times and storage, and the consequences of deviating
- Laboratory equipment such as articulators, curing units, trimmers, lathes and polishing equipment: purpose, setup and basic maintenance
- Infection control, material safety and ergonomic practices in the laboratory
- Choosing among available materials or equipment for a described situation
Because this knowledge is distributed across the entire workflow, studying it alongside the stage where each material appears (gypsum with Domain 1, acrylic with Domain 4, abrasives with Domain 5) often sticks better than isolating it as a separate pile of facts.
Written Exam vs. Practical: Where Each Domain Shows Up
The seven domains describe the specialty, but candidates meet them in two different formats. Keep the two clearly separated in your planning.
| Feature | Specialty Written (Complete Dentures) | Practical |
|---|---|---|
| Format | 90 delivered questions: 80 scored plus 10 unscored | Hands-on laboratory work with preliminary fabrication |
| Time | 1 hour 30 minutes | Up to 5 hours 15 minutes plus preliminary fabrication |
| Question style | Four options, one best answer | Performance-based subtests |
| Delivery | FastTest and MonitorEDU, closed-book, remotely proctored, no breaks | NBC-arranged group/host or remote laboratory testing |
| Fee | $275 | $650 |
The written exam tests your command of all seven domains through scenarios and recall. The Practical tests whether you can actually perform the work, and every Practical subtest must be passed in the same administration. All required exams must be passed within four years of your first pass. For the full cost picture, including materials, shipping and the optional articulator rental, see our CDT-CD certification cost breakdown.
Sequencing Your Prep by Domain
If you follow a structured plan, sequence the domains in the same order the denture moves through the lab, then loop back to the cross-cutting material. One reasonable arrangement:
Foundations: Domains 1, 2 and 7 (first pass)
- Master casts and impression evaluation, because every later error can trace back here
- Record bases and occlusal rims, a short domain that pays off quickly
- Gypsum, wax and base materials from Domain 7, studied alongside the steps that use them
Setup and processing: Domains 3 and 4
- Tooth selection and arrangement, the heaviest domain, with extra scenario practice
- Flasking, packing, curing and defect diagnosis
Completion and correction: Domains 5 and 6
- Finishing, contouring and polishing sequences
- Repairs, relines, rebases and alterations, with attention to telling similar procedures apart
Integration
- Mixed-domain questions that force you to identify the stage before answering
- Targeted review of whichever domains your practice results show to be weakest
Adjust the pacing to your own background. A technician who spends most days on processing and finishing may need less time on Domains 4 and 5 and more on Domain 6 repairs or Domain 3 theory. Our CDT-CD cheat sheet is a handy condensed reference once you have worked through each domain, and practice questions on the main site let you check which areas still need attention.
Key Takeaway
Because the blueprint is so evenly distributed, the safest strategy is balanced coverage with extra scenario practice on Domain 3 and a quick, complete pass through Domain 2. Use timed practice sets to find your weak domains early, then re-test them rather than rereading notes.
Frequently Asked Questions
Select and Arrange Artificial Teeth (Domain 3) has the largest range at 16-18%. It is followed closely by Domain 1 (Master Casts) and Domain 5 (Finish & Polish), each at 15-17%.
Not wise. Record Base Plate & Occlusal Rim is only 5-7% of the blueprint, but it is quick to learn and its skills carry directly into the hands-on Practical, so it offers strong study value for the time invested.
The specialty written exam delivers 90 questions, of which 80 are scored and 10 are unscored, over 1 hour 30 minutes. Each item has four options with one best answer. You will not be told which items are unscored.
The seven domains describe the specialty's content, which both components draw from. The written exam samples them through questions; the Practical assesses hands-on performance, and every Practical subtest must be passed in the same administration. Review the CDT-CD requirements for eligibility details and the passing score discussion for how results are framed.
The NBC handbook revised March 1, 2026 retains the linked 2016/2017 specialty outline. That said, always confirm the current handbook and outline directly with NBC before finalizing your study plan, and see our difficulty guide for how candidates typically judge the challenge of each component.