- What This Cheat Sheet Covers (and What CDT-C Means Here)
- Credential Snapshot: Who Certifies, What You Earn
- Exam Format Numbers at a Glance
- The Five Domains and Where the Points Are
- Domain 4: Ceramic Application and Contouring Essentials
- Substructure, Materials and Equipment: The Middle Weight Block
- Preliminary Work Up and Master Cast: The Small Domains
- Fees, Eligibility and Testing Logistics
- The Four-Year Window and Practical Rules
- Renewal Quick Facts
- A Domain-Ordered Review Sequence
- FAQ
- The Ceramics written specialty has 90 delivered questions (80 scored, 10 unscored) in 1 hour 30 minutes.
- Ceramic Application & Contouring is the heaviest domain at 36-38% of the specialty exam.
- Standard total cost calculates to $1,200: $275 Comprehensive, $275 Ceramics written, $650 Practical.
- All required exams must be passed within 4 years of your first pass.
What This Cheat Sheet Covers (and What CDT-C Means Here)
This page condenses the facts you need to hold in your head before and during preparation for the Certified Dental Technician credential with the Ceramics specialty. On this site, "CDT-C" is a shorthand identifier for that credential. It is a site label rather than a verified official postnominal, so when you list credentials professionally, follow the certifying body's own wording. If you are new to the terminology, the explainer What Is CDT-C? walks through the naming in more depth.
Use this sheet as a quick-reference layer. For the long-form versions of each topic, the CDT-C study guide and the complete guide to all 5 content areas go deeper. To pressure-test your recall after reading, the CDT-C practice tests are the natural next step.
Credential Snapshot: Who Certifies, What You Earn
The credential is administered by the National Board for Certification in Dental Laboratory Technology (NBC). The official credential is the CDT, the Certified Dental Technician designation, with Ceramics as a specialty. Specialties are earned on top of the Comprehensive exam, and the Ceramics path combines three pieces:
- Comprehensive written exam, the general knowledge component.
- Ceramics written specialty exam, the component this site's "Exam" line refers to.
- Practical exam, a hands-on laboratory assessment.
Exam Format Numbers at a Glance
| Component | Delivered Questions | Scored / Unscored | Time |
|---|---|---|---|
| Ceramics Written Specialty | 90 | 80 scored + 10 unscored | 1 hour 30 minutes |
| Comprehensive Written | 170 | 160 scored + 10 unscored | 2 hours 45 minutes |
| Practical | Hands-on | Subtest-based | Up to 5 hours 15 minutes plus preliminary work |
Written questions are four-option, one-best-answer items. "Best answer" matters: more than one choice can look defensible at the bench, and you are being asked to choose the most correct one under accepted laboratory practice. Because 10 questions are unscored, you cannot tell which ones to ignore, so treat every item as live.
Written exams are closed-book and proctored with no breaks. Delivery runs through FastTest (Assessment Systems) and MonitorEDU. Whether you may use a personal calculator, and whether the exam is adaptive, are not verified in the materials this site relies on. Check the current NBC handbook before test day rather than assuming.
The Five Domains and Where the Points Are
| Domain | Name | Weight |
|---|---|---|
| 1 | Perform Preliminary & Diagnostic Work Up | 10-12% |
| 2 | Manufacture Master Cast (Traditional or Digital) | 9-11% |
| 3 | Manufacture Substructure for Ceramics | 18-20% |
| 4 | Ceramic Application & Contouring | 36-38% |
| 5 | Selection and Application of Materials and Equipment for Ceramics | 21-23% |
Two things stand out. First, Domains 4 and 5 together carry roughly 57-61% of the exam. Second, the two "front-end" domains, preliminary work up and master cast, are small individually but still account for about a fifth of the exam combined. The handbook revised March 1, 2026 retains the linked 2016/2017 Ceramics outline, so the weights above reflect that retained outline. A detailed domain-by-domain breakdown lives in the CDT-C exam domains guide.
Domain 4: Ceramic Application and Contouring Essentials
Domain 4: Ceramic Application & Contouring (36-38%)
This is the largest domain and the one where your daily bench experience is most directly tested. Expect questions that ask you to reason about what happens to porcelain and the restoration as a whole during build-up, firing and finishing.
- Layering logic: how opaque, dentin, enamel and translucent materials are sequenced to control shade, depth and vitality
- Condensation and shrinkage: how porcelain contracts on firing and how to compensate in build-up
- Contour and anatomy: proper form, emergence profile, marginal ridges, embrasures and occlusal morphology
- Contacts and occlusion: proximal contact placement, centric contacts, and guidance considerations
- Firing cycle fundamentals: stages of firing, how temperature, hold time and vacuum affect the result
- Finishing: texture, surface characterization, glazing and polishing choices
- Troubleshooting: recognizing causes of defects such as bubbles, cracks, poor color and over- or under-contour
The questions in this domain tend to reward cause-and-effect reasoning more than memorized definitions. If a restoration shows a particular defect, you should be able to trace it back to a likely cause in condensation, firing or substructure design. That kind of reasoning also connects Domain 4 to Domain 3, so avoid studying them as isolated silos.
Substructure, Materials and Equipment: The Middle Weight Block
Domains 3 and 5 together represent roughly 39-43% of the written specialty. They are the "why does this work" domains, and they overlap more than their titles suggest.
Domain 3: Manufacture Substructure for Ceramics (18-20%)
The substructure is the foundation of every ceramic restoration, and questions here test whether you can design and produce one that supports the porcelain properly.
- Framework and coping design: thickness, support for the veneering ceramic, and avoiding sharp internal angles
- Connector and pontic considerations for multi-unit work
- Metal and ceramic substructure types and their fabrication workflows
- Preparation of the substructure surface before ceramic application
- Marginal fit and finishing requirements for the substructure itself
Domain 5: Selection and Application of Materials and Equipment for Ceramics (21-23%)
This domain asks you to choose the right material or piece of equipment for a given clinical and laboratory situation, and to use it correctly.
- Matching ceramic systems and alloys to the case, including compatibility considerations
- Understanding material properties that drive selection, such as strength, translucency and thermal behavior
- Furnace operation, calibration and maintenance concepts
- Instruments, investments and consumables used across the ceramic workflow
- Safety and handling considerations for laboratory materials and equipment
Because Domain 5 is about selection, scenario questions are common: given a case description, which material or equipment choice is best? The one-best-answer format makes it important to weigh trade-offs rather than recall isolated facts. The study guide suggests ways to organize this material into comparison sheets.
Preliminary Work Up and Master Cast: The Small Domains
Do not neglect the two smaller domains. They are individually modest in weight, but they are also where many experienced technicians can pick up reliable points because the material is procedural and rule-based.
Domain 1: Perform Preliminary & Diagnostic Work Up (10-12%)
- Evaluating the prescription, impressions or digital scans for completeness and quality
- Recognizing problems that must be communicated back to the clinician before proceeding
- Reading case information such as shade, material and design requirements
- Infection control and documentation practices at case intake
Domain 2: Manufacture Master Cast (Traditional or Digital) (9-11%)
- Pouring, pinning, sectioning and trimming traditional stone models
- Die preparation and margin identification
- Digital model workflows, including scan-based design and printed or milled models
- Articulation and mounting concepts that carry through to later steps
Note that the domain title explicitly says "Traditional or Digital." Be prepared for questions from both workflows, even if your own lab leans heavily one way.
Fees, Eligibility and Testing Logistics
| Item | Amount |
|---|---|
| Comprehensive written | $275 |
| Ceramics Written Specialty | $275 |
| Practical | $650 |
| Calculated standard total | $1,200 |
That $1,200 is a calculated total for the standard route. Materials, optional preparation, shipping and any $100 articulator rental are extra, and eligible RG and added-specialty routes differ. For a fuller budget view, see the CDT-C certification cost breakdown, and for the value question, is the CDT-C certification worth it.
Eligibility in brief
- English language ability and a high-school equivalent education
- Ethical and legal standing
- An approved experience or education route: the standard route is 5 years of experience, with alternatives for CODA graduates and current RGs
- Continuing education can substitute for experience at 75 CE hours per substituted experience year, subject to NBC limits
- Employment verification is required
No mandatory commercial prep course is established, so preparation choices are yours to make. The full prerequisite picture is in the CDT-C requirements guide.
The Four-Year Window and Practical Rules
The Practical is arranged through NBC as group or host-site testing or as remote laboratory testing. The remote format has strict conditions: one location, one sitting, continuous camera coverage and the required laboratory equipment. The Practical runs up to 5 hours 15 minutes plus preliminary work, so it is as much an endurance and workflow-discipline test as a skills test.
What the historical numbers do and do not tell you
The only outcome figures available are historical 2018 results: Ceramics written 61.11% (33/54) and Practical 89.74% (35/39). These are not first-attempt rates and not current rates, so treat them as a rough historical reference rather than a forecast. The pass rate article explains how to read them carefully, and the passing score guide covers scoring questions.
Renewal Quick Facts
Certification is maintained annually. Renewal requires an ethics attestation, a fee and 12 CE hours, split as follows:
- 1 hour of Regulatory content
- 6 hours of Scientific content, with approval conditions that apply
- 5 additional eligible hours
Holding multiple specialties does not multiply the renewal requirements. Build your CE habit early, since the same hours you earn can support later renewal cycles. Timing details for testing windows are in the exam dates guide.
A Domain-Ordered Review Sequence
If you only have a handful of weeks, sequence by weight and dependency rather than by chapter order. This is the one place where scheduling matters more than technique.
Domains 1 and 2
- Lock in case intake, impression and scan evaluation, and cast and die procedures
- Cover both traditional and digital master cast workflows
Domain 3
- Review substructure design principles and fabrication workflows
- Connect substructure choices to what the veneering ceramic will need
Domain 5
- Build comparison sheets for materials, alloys and equipment
- Practice scenario-based selection questions
Domain 4 (give it the most time)
- Work through layering, condensation, firing and finishing
- Drill troubleshooting by tracing defects to causes
Mixed review under timing
- Run 90-question sets in 90 minutes to rehearse the real pace
- Revisit weak areas, weighted toward Domain 4
The reasoning: the early domains are procedural and quick to consolidate, Domain 3 feeds directly into Domain 4, and giving Domain 4 the longest stretch matches its 36-38% weight. Pacing matters too, since 90 questions in 90 minutes leaves roughly a minute per item.
Key Takeaway
Spend your review hours roughly in proportion to domain weight, but front-load the quick procedural domains so you can devote your longest, most focused blocks to Ceramic Application & Contouring.
FAQ
The exam delivers 90 questions, of which 80 are scored and 10 are unscored. You have 1 hour 30 minutes, and each question has four options with one best answer.
Ceramic Application & Contouring is the largest at 36-38%. Selection and Application of Materials and Equipment for Ceramics follows at 21-23%, then Manufacture Substructure for Ceramics at 18-20%.
The calculated standard total is $1,200: $275 for the Comprehensive, $275 for the Ceramics written specialty and $650 for the Practical. Materials, optional preparation, shipping and any $100 articulator rental are additional, and some routes differ.
All required exams must be passed within 4 years of your first pass. Every Practical subtest must also be passed in the same administration, so plan your timing carefully.
Annual renewal requires an ethics attestation, a fee and 12 CE hours: 1 Regulatory, 6 Scientific and 5 additional eligible hours. Multiple specialties do not multiply these requirements.