- The Short Answer: What the Letters Mean
- Why the Identity Check Matters
- Who Certifies This Credential
- How the Credential Is Structured
- The Five Domains Behind the Name
- What the Specialty Written Exam Looks Like
- Fees and Eligibility in Plain Terms
- Where Ceramics Specialists Work
- Scheduling Your Prep by Domain
- Frequently Asked Questions
- CDT-C on this site means Certified Dental Technician - Ceramics, the Ceramics specialty of the NBC's CDT credential.
- The NBC is the National Board for Certification in Dental Laboratory Technology; CDT-C is our site identifier, not a verified official postnominal.
- 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.
The Short Answer: What the Letters Mean
On this site, CDT-C stands for Certified Dental Technician - Ceramics. It refers to the Ceramics specialty path within the Certified Dental Technician (CDT) credential offered by the National Board for Certification in Dental Laboratory Technology (NBC). The "CDT" portion identifies the base credential for dental laboratory technicians, and the "C" is our shorthand for the Ceramics specialty.
There is a nuance worth stating clearly. The NBC's official credential is the CDT with a Ceramics specialty. "CDT-C" is the identifier we use on cdtcexam.com to keep this specific path distinct and easy to search; it is not a verified official postnominal that you would be expected to print on a business card in that exact form. If you want the broader framing, our explainers on what CDT-C is and the meaning of CDT-C cover the same ground from different angles.
Why the Identity Check Matters
The acronym "CDT-C" is not unique. Several unrelated credentials in other fields use the same letters, and a casual web search can surface material about certifications that have nothing to do with dental laboratory work. Their exam fees, testing windows, scoring approaches and eligibility rules do not apply here.
A practical test: the Ceramics path is about fabricating porcelain restorations, so you should see references to substructures, master casts, shade, contour and firing. If those are missing, you are on the wrong page.
Who Certifies This Credential
The certifying body is the National Board for Certification in Dental Laboratory Technology (NBC). The NBC administers the CDT program, including its Comprehensive exam, its specialty written exams and its hands-on Practical exam. Written components are delivered through FastTest (Assessment Systems) and MonitorEDU, while the Practical is arranged by the NBC as group or host-site testing, or as remote laboratory testing.
The NBC's candidate handbook was revised March 1, 2026. Notably, that handbook still links to the 2016/2017 Ceramics content outline, so the domain structure described below reflects the outline candidates are actually working from. For a deeper walk-through of eligibility, see our guide to CDT-C requirements, prerequisites and how to qualify.
How the Credential Is Structured
Understanding the name means understanding the pieces. Earning the credential with a Ceramics specialty involves three required exams, and this is where many candidates get confused about what "the exam" refers to.
| Component | Format | Detail | Fee |
|---|---|---|---|
| Comprehensive (written) | 170 delivered questions (160 scored + 10 unscored) | 2 hours 45 minutes | $275 |
| Ceramics Written Specialty | 90 delivered questions (80 scored + 10 unscored) | 1 hour 30 minutes | $275 |
| Practical (hands-on) | Laboratory work, group/host or remote | Up to 5 hours 15 minutes plus preliminary work | $650 |
On this site, the Exam line refers only to the Specialty Written component. That is the 90-question Ceramics test. Our practice material targets that component, while the Comprehensive and Practical are separate hurdles you must also clear.
The Five Domains Behind the Name
The "Ceramics" in the credential is defined by five specialty domains. Their weights tell you where exam points concentrate, and they map neatly onto the workflow of building a ceramic restoration from prescription to finished contour. Our complete guide to all five CDT-C content areas goes deeper; here is the orientation.
Domain 1: Perform Preliminary & Diagnostic Work Up (10-12%)
The front end of the case: reading the prescription and evaluating what you have been given before any fabrication begins.
- Reviewing prescriptions, impressions or digital files for completeness and usability
- Assessing preparation design and space for the intended ceramic material
- Recognizing problems that should be communicated back to the clinician
Domain 2: Manufacture Master Cast (Traditional or Digital) (9-11%)
Building an accurate working foundation, whether through conventional or digital workflows.
- Cast and die accuracy and how errors propagate into the final restoration
- Differences between traditional and digital model production
- Articulation and relationships that affect occlusal outcomes
Domain 3: Manufacture Substructure for Ceramics (18-20%)
The framework that supports the porcelain, where material choice and design determine long-term success.
- Substructure design principles that support uniform ceramic thickness
- Material-specific considerations for the supporting structure
- Fit, strength and preparation of the substructure before ceramic application
Domain 4: Ceramic Application & Contouring (36-38%)
The largest domain by far, covering the artistry and technique of building and shaping the ceramic.
- Layering and build-up technique, including shade and translucency control
- Contour, anatomy, proximal contacts and occlusion
- Firing considerations and troubleshooting common ceramic defects
- Finishing and surface characteristics
Domain 5: Selection and Application of Materials and Equipment for Ceramics (21-23%)
Knowing which materials and equipment suit which clinical situation, and using them correctly.
- Matching ceramic systems to indications
- Equipment use, calibration and maintenance concepts
- Material handling and manufacturer-aligned processing
Together, Domains 4 and 5 account for roughly 57-61% of the exam, so the name "Ceramics" is earned mostly in how you apply and contour porcelain and how well you understand your materials.
What the Specialty Written Exam Looks Like
The Ceramics Written Specialty consists of 90 delivered questions: 80 are scored and 10 are unscored. You will not know which are which, so treat every item seriously. Each question has four options and one best answer, which means the task is often choosing the most defensible option among several plausible ones rather than spotting an obviously wrong choice.
The written exams are closed-book and proctored with no breaks. Whether a personal calculator is permitted, and whether the test is adaptive, are not verified in the sources we rely on, so check the current handbook before test day instead of assuming. For a realistic view of difficulty, read how hard the CDT-C exam is.
Key Takeaway
Because the best-answer format rewards judgment, practice explaining why an option is best for a given restoration scenario, not just recalling definitions. Our practice tests are built around this style.
Fees and Eligibility in Plain Terms
The standard calculated total is $1,200: $275 for the Comprehensive, $275 for the Ceramics Written Specialty, and $650 for the Practical. That figure excludes materials, optional preparation, shipping, and a $100 articulator rental if you need one. Candidates on eligible RG or added-specialty routes may see different totals. Our CDT-C certification cost breakdown itemizes the extras.
Eligibility rests on several elements: English proficiency, a high-school equivalent, ethical and legal standing, and an approved experience or education route.
- Standard route: 5 years of qualifying experience.
- Alternatives: CODA graduate and current-RG pathways exist.
- CE substitution: 75 continuing education hours can substitute for each experience year, within NBC limits.
- Verification: Employment verification is required.
There is no mandatory commercial prep course established, which means how you prepare is your choice. If you are weighing the investment, our ROI analysis of the CDT-C certification lays out the considerations.
Where Ceramics Specialists Work
Credentialed ceramists typically work in settings where porcelain restorations are produced: commercial dental laboratories, in-house laboratories attached to dental practices, and specialty or prosthodontic-focused labs. Some move into laboratory ownership, technical supervision or training roles. Employers often value the credential as an objective signal of skill in an area where quality is visible in every shade match and contour.
We deliberately avoid quoting pay figures here, because we will not present numbers we cannot source. For discussion of earning potential and positions, see our salary guide and our overview of CDT-C jobs.
Scheduling Your Prep by Domain
The domain weights suggest an order of attack. Start with the smaller, foundational domains so the larger ones make sense, then spend your heaviest time where the points are. Here is one way to sequence a six-week plan around the Specialty Written exam. For a fuller approach, see our CDT-C study guide.
Domains 1 and 2
- Prescription review, preparation assessment and case evaluation
- Traditional versus digital master cast workflows
Domain 3 (first pass)
- Substructure design principles and material considerations
- Fit and preparation before ceramic application
Domain 4
- Layering, shade, translucency and contour
- Firing behavior and defect troubleshooting
Domain 5
- Material and equipment selection by indication
- Processing and handling aligned with manufacturer guidance
Mixed review
- Timed sets mirroring the 90-question, 1 hour 30 minute format
- Revisit weak areas, weighted toward Domains 4 and 5
Two weeks go to Domain 4 because it carries 36-38% of the exam. A quick-reference companion is our CDT-C cheat sheet, and for scoring details see the passing score explainer.
Frequently Asked Questions
On this site, CDT-C stands for Certified Dental Technician - Ceramics. It denotes the Ceramics specialty of the Certified Dental Technician credential from the National Board for Certification in Dental Laboratory Technology. The official credential is the CDT with a Ceramics specialty; CDT-C is our identifier rather than a verified official postnominal.
No. Several unrelated credentials in other fields share the letters CDT-C. This site concerns only the dental laboratory credential certified by the NBC, and none of the fees, dates or rules of other credentials apply to it.
On this site, the Exam line means the Ceramics Written Specialty component only: 90 delivered questions (80 scored, 10 unscored) in 1 hour 30 minutes. You must also complete the Comprehensive written exam and the hands-on Practical to earn the credential.
The standard calculated total is $1,200, made up of $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 extra, and eligible RG and added-specialty routes can differ.
Ceramic Application & Contouring is the largest at 36-38% of the Specialty exam, followed by Selection and Application of Materials and Equipment for Ceramics at 21-23%. Build foundations in the smaller domains first, then invest the most time in those two. You can explore the full domain breakdown or begin with a practice test.
Our related explainers cover the same question in different phrasing, including what CDT-C means, what CDT-C certification is and the CDT-C certification overview.