- What a CDT-PD Actually Is
- Who Awards the Credential
- The Three-Exam Structure
- Inside the Specialty Written Exam
- The Eight Content Domains
- The Practical Exam in Plain Terms
- Who Can Sit for It
- Fees, Windows and Logistics
- Where the Credential Fits in a Lab Career
- Keeping the Credential Active
- Sequencing Your Preparation
- Frequently Asked Questions
- CDT-PD is the site label for NBC's Certified Dental Technician credential with the Partial Dentures specialty.
- The specialty written exam has 90 questions (80 scored, 10 unscored) in 1 hour 30 minutes.
- Survey, Design and Preparation for Framework is the largest domain at 25-27% of the blueprint.
- The practical has four grading groups, and all must pass in the same administration.
What a CDT-PD Actually Is
"CDT-PD" is the label this site uses for the Certified Dental Technician (CDT) credential with the Partial Dentures specialty. It identifies a dental laboratory technician who has met a national standard in the design and fabrication of removable partial dentures. It is a technician credential for people who work at the bench, not a dental-clinic or hygiene certification.
The credential is built from more than one exam. A technician passes a comprehensive exam covering general dental technology, a specialty written exam in partial dentures, and a hands-on practical exam. Together they demonstrate both knowledge and bench skill. When people ask "what is a CDT-PD?", the short answer is: a Certified Dental Technician who has been tested in the partial dentures specialty.
This article focuses on the specialty written exam, with supporting coverage of the practical exam and the certification pathway. If you want the shorter definitional explainers, see What Is CDT-PD? and What Does CDT-PD Stand For?.
Who Awards the Credential
The credential is administered by the National Board for Certification in Dental Laboratory Technology (NBC). NBC sets eligibility rules, publishes the CDT Examination Handbook and Application, schedules testing windows, grades the practical, and manages annual renewal. Anything you read about fees, deadlines or pass requirements should trace back to NBC's current handbook rather than to third-party summaries, including this one. Confirm details with NBC before you apply.
Because several unrelated credentials abbreviate to similar letters, always check that a source is describing the NBC Certified Dental Technician credential in Partial Dentures. The details here apply only to that credential.
The Three-Exam Structure
A first-time candidate completes three components:
- Comprehensive written exam: 170 administered questions (160 scored, 10 unscored) in 2 hours 45 minutes.
- Specialty written exam (Partial Dentures): 90 administered questions (80 scored, 10 unscored) in 1 hour 30 minutes.
- Practical exam: 5 hours 15 minutes of timed work, plus advance preliminary work.
The components can be taken in any order, but all must be passed within four years of the first pass. A current Recognized Graduate (RG) whose qualifying examination falls within the four-year allowance may have that exam substitute for the comprehensive.
| Route | Components | Exam-fee subtotal |
|---|---|---|
| Standard initial route | Comprehensive + specialty written + practical | $1,200 |
| Existing CDT adding a specialty | Specialty written + practical | $925 |
The individual fees are $275 for the specialty written, $275 for the comprehensive and $650 for the practical. The subtotals cover exam fees only. Budget separately for preparation materials, equipment, applicable shipping, travel, renewal and any retakes. For a fuller breakdown, see the CDT-PD certification cost guide.
Inside the Specialty Written Exam
Format and delivery
The specialty written exam administers 90 questions in 1 hour 30 minutes. Of those, 80 are scored and 10 are unscored field-test items; you will not know which are which, so treat every question as live. Items are four-option, single-best-answer multiple choice, including completion-style stems where you pick the option that best finishes a sentence.
Testing is delivered through FastTest computer-based testing with MonitorEDU remote proctoring. The sessions are closed-book. No outside assistance, books, dictionaries or scratch paper are allowed, and there is no scheduled break. Remote testing requires:
- A private workspace
- A compatible computer with webcam and audio
- A reliable internet connection
- A smartphone camera
- Photo ID
Passing requirement
NBC supplies the written passing requirement in candidate confirmation information rather than as a single public figure in this article. Check your confirmation materials and see CDT-PD Passing Score for how the requirement is communicated. For how difficult candidates tend to find the exam, see How Hard Is the CDT-PD Exam?, and for what is and is not known about outcomes, CDT-PD Pass Rate.
The Eight Content Domains
NBC publishes the specialty outline as eight domains with percentage ranges. Treat those ranges as ranges, not fixed weights; the number of questions per domain can vary between exam forms.
| Domain | NBC Range |
|---|---|
| 1. Create Master Casts from Stock and/or Custom Tray Impressions | 6-8% |
| 2. Survey, Design and Preparation for Framework (Traditional or Digital) | 25-27% |
| 3. Manufacture Refractory Cast | 3-5% |
| 4. Manufacture Partial Dentures Frameworks | 10-12% |
| 5. Select and Arrange Artificial Teeth and Process | 9-11% |
| 6. Finish and Polish Partial Denture Base | 9-11% |
| 7. Procedures for Repairs and Alterations for Partial Dentures | 11-13% |
| 8. Selection and Application of Materials and Equipment | 18-20% |
Domain 2: Survey, Design and Preparation for Framework (25-27%)
This is the heart of the exam and the largest single domain. It covers both traditional and digital approaches to planning a removable partial denture framework.
- Surveying the cast and establishing a path of insertion
- Identifying undercuts, guide planes and tissue undercuts relevant to design
- Selecting major and minor connectors, rests and clasp assemblies
- Preparing the cast for framework fabrication, including block-out and relief
Domain 8: Selection and Application of Materials and Equipment (18-20%)
The second-largest domain tests whether you choose and handle the right material or instrument for each stage.
- Alloys, investments, waxes, acrylic resins and their working properties
- Equipment used across casting, processing, finishing and polishing
- Matching a material to the clinical or laboratory situation
Domains 4 and 7: Frameworks, Repairs and Alterations
Framework manufacture (10-12%) and repairs and alterations (11-13%) together carry a substantial share of the blueprint. Expect questions on casting and finishing metal frameworks, and on the logic of repairing, adding teeth or clasps, relining or otherwise modifying an existing partial.
Smaller domains: casts, refractory work, teeth and finishing
Master casts (6-8%), refractory casts (3-5%), tooth selection, arrangement and processing (9-11%) and finishing and polishing the denture base (9-11%) are individually smaller but collectively meaningful. Skipping them to over-study Domain 2 is a common mistake.
For a domain-by-domain breakdown, read the complete CDT-PD exam domains guide.
The Practical Exam in Plain Terms
The practical is hands-on. It involves 5 hours 15 minutes of timed work plus advance preliminary work completed before the testing session. The focus areas are:
- Advance cast and framework preparation
- Timed design
- Wrought-wire clasp joining
- Waxing
- Metal finishing
Grading is organized into four groups: preliminary work, design, waxing and metalwork. All four must pass, and every required practical subtest must pass in the same administration. Work is independently graded by three examiners.
Practical testing takes place at a suitable dental laboratory with MonitorEDU, or at a scheduled volunteer-host group site. Remote practical windows run in January, March, May, July, September and November.
Who Can Sit for It
Baseline requirements include 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 is 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 examination 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. No more than one-third may be self-study, no more than one-third qualified mentoring, and at least one-third must be qualifying NBC/ADA-CERP/AGD education.
Applications require education and employment records, supervisor details, CE documentation and job-task mapping. Mentorship requires a certified supervisor and an attestation. The full list is in the CDT-PD requirements guide.
Fees, Windows and Logistics
Written testing windows run monthly, with applications due by the 20th of the preceding month. Remote practical windows run in the six months listed above. The exam dates guide covers scheduling in more detail.
- Accommodations: requests require supporting documentation and at least 30 days' advance written notice.
- Retakes: a candidate who fails the written exam waits at least 30 days before reapplying and pays a new exam fee.
- Four-year clock: all initial components must be passed within four years of the first pass.
Key Takeaway
Count backward from the 20th of the month before your target written window, and request any accommodation at least 30 days ahead. Missing either deadline pushes your attempt out by a month or more.
Where the Credential Fits in a Lab Career
Partial denture work is done in commercial dental laboratories, in-house laboratories attached to dental practices, and prosthodontic or denture-focused labs. Certification signals documented competence to employers and to the dentists who send cases. For some technicians it supports advancement into lead technician, quality-control or training roles, though outcomes vary by employer and region.
On pay, the Bureau of Labor Statistics reports a $49,610 median annual wage for dental laboratory technicians in May 2025. Treat that as occupation-wide context. It is not specialty-specific pay and not evidence of a certification premium. For more on earnings and value, see the salary guide, whether the certification is worth it, and CDT-PD jobs.
Keeping the Credential Active
Renewal is annual and includes a renewal fee, a legal and ethical attestation, and 12 CE hours:
- 1 hour in Regulatory Standards
- 6 hours in Scientific topics, including at least 3 NBC-approved
- 5 additional allowable hours
Adding further specialties does not increase the annual CE requirement, which makes holding multiple specialties administratively simpler than it might sound.
Sequencing Your Preparation
Rather than generic scheduling, let the blueprint drive the order. A sensible sequence puts the heaviest, most foundational material first and the smaller procedural domains later:
Domain 2 foundations
- Surveying, path of insertion, connectors, rests and clasp assemblies
- Digital versus traditional design workflows
Domain 8 and Domain 4
- Alloys, investments, waxes and resins
- Equipment use and framework manufacture
Domains 1, 3, 5, 6 and 7
- Master and refractory casts, tooth arrangement and processing
- Finishing, polishing, repairs and alterations
Timed practice
- Full 90-question sets in unbroken 90-minute sessions
- Review misses by domain, not by question number
For a fuller plan, see the CDT-PD study guide and the one-page cheat sheet. When you are ready to test yourself, work through realistic questions on the CDT-PD practice test site, which is built around the same four-option, single-best-answer format.
Frequently Asked Questions
It is the site label for the NBC Certified Dental Technician (CDT) credential with the Partial Dentures specialty. It refers only to that credential.
There are 90 administered questions: 80 scored and 10 unscored field-test items, in 1 hour 30 minutes. Questions are four-option, single-best-answer multiple choice.
Survey, Design and Preparation for Framework (Traditional or Digital) at 25-27%, followed by Selection and Application of Materials and Equipment at 18-20%.
Exam fees are $275 for the specialty written, $275 for the comprehensive and $650 for the practical. The standard initial route subtotals $1,200, and an existing CDT adding a specialty pays $925. Preparation, travel, renewal and retakes are extra.
You must wait at least 30 days before reapplying and pay a new exam fee. All initial components must still be passed within four years of your first pass.