- The Credential at a Glance
- Numbers to Memorize: Fees, Timing and Format
- Eligibility Pathways in One Pass
- The Six Domains and Their Weight Ranges
- Domain-by-Domain Review Notes
- Practical Exam Quick Facts
- Exam-Day Rules and Logistics
- Retakes, the Four-Year Clock and Renewal
- Salary Context Without the Hype
- Scheduling Your Review Around the Blueprint
- Frequently Asked Questions
- The specialty written exam has 90 administered questions (80 scored, 10 unscored) in 1 hour 30 minutes.
- Finish and Polish the Restoration is the largest domain at 24-26%, followed by Materials and Equipment at 21-23%.
- Initial route exam fees total $1,200: $275 specialty written, $275 comprehensive, $650 practical.
- All required practical subtests must pass in the same administration, graded independently by three examiners.
The Credential at a Glance
This is the one-page version of what you need to know about the Certified Dental Technician credential in the Crown and Bridge specialty. The National Board for Certification in Dental Laboratory Technology (NBC) awards the Certified Dental Technician (CDT) designation, and Crown and Bridge is one of the specialties a technician can earn. On this site, "CDT-CB" is the shorthand label for that specialty. If you need the basics of the name itself, see What Does CDT-CB Stand For? and What Is CDT-CB Certification?.
The credential is built from three components: a comprehensive written exam, a specialty written exam, and a hands-on practical. This cheat sheet concentrates on the specialty written exam, with supporting notes on the practical and the certification pathway, because the written exam is where most candidates need a structured review plan. When you want to test yourself against the format, the CDT-CB practice test mirrors the four-option, single-best-answer style.
Numbers to Memorize: Fees, Timing and Format
Keep these figures where you can see them. They come straight from the NBC CDT Examination Handbook and Application (March 1, 2026) and the NBC certification pages.
| Component | Questions / Work | Time | Fee (USD) |
|---|---|---|---|
| Specialty written (Crown and Bridge) | 90 administered: 80 scored + 10 unscored field-test | 1 hour 30 minutes | $275 |
| Comprehensive written | 170 administered: 160 scored + 10 unscored | 2 hours 45 minutes | $275 |
| Practical | Hands-on work plus advance preliminary work | 5 hours 15 minutes timed | $650 |
Two calculated subtotals are worth memorizing. The standard three-exam initial route totals $1,200. An existing CDT adding a specialty through its written and practical exams totals $925. Neither figure includes preparation materials, equipment, applicable shipping, travel, renewal or retakes, so budget for those separately. For a full breakdown, read CDT-CB Certification Cost 2026: Complete Pricing Breakdown.
Eligibility Pathways in One Pass
Baseline requirements for every candidate: a high-school diploma or equivalent, working English, satisfactory ethical and legal standing, and an NBC-approved technical pathway. The pathway is where the details multiply, so here they are in compact form.
Standard and education-based routes
- Standard pathway: five years of documented dental-technology education, training and/or experience.
- Full-time definition: at least 35 hours per week. Concurrent education and employment are not double-counted.
- Two-year CODA program graduates: may qualify with two additional nonconcurrent years of practical experience.
Recognized Graduate (RG) routes
- A current RG whose qualifying examination was passed within four years needs no additional experience after a two-year CODA program.
- After a non-CODA program, a current RG needs three on-the-job years.
CE-substitution pathways
| Experience years | Continuing education hours |
|---|---|
| 4 years | 75 CE hours |
| 3 years | 150 CE hours |
| 2 years | 225 CE hours |
Within the CE hours, no more than one-third may be self-study, no more than one-third may be qualified mentoring, and at least one-third must be qualifying NBC or 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 walkthrough lives in CDT-CB Requirements 2026: Eligibility, Prerequisites & How to Qualify.
The Six Domains and Their Weight Ranges
NBC publishes the specialty outline as percentage ranges, not fixed weights. Keep them as ranges in your head; do not convert them into exact question counts.
| Domain | Weight range |
|---|---|
| Domain 1: Perform Preliminary & Diagnostic Work Up | 9-11% |
| Domain 2: Manufacture Master Cast (Traditional or Digital) | 10-12% |
| Domain 3: Design and Manufacture Patterns (Traditional or Digital) | 17-19% |
| Domain 4: Manufacture Restoration (Traditional or Digital) | 11-13% |
| Domain 5: Finish and Polish the Restoration | 24-26% |
| Domain 6: Selection and Application of Materials and Equipment for Crown & Bridge | 21-23% |
For a deeper look at each content area, see CDT-CB Exam Domains 2026: Complete Guide to All 6 Content Areas.
Domain-by-Domain Review Notes
The notes below are the kinds of topics a crown and bridge technician should be able to reason about for each domain. They are study prompts, not a leaked question list; use your program materials, lab experience and NBC's published outline to confirm depth.
Domain 5: Finish and Polish the Restoration (24-26%)
The heaviest domain. Expect questions that ask what to do, in what sequence and with which instrument or abrasive, to bring a restoration from raw casting, pressing or milling to a finished state.
- Contours, embrasures, occlusal anatomy and contacts: what makes a finish acceptable versus overcut or flattened.
- Abrasive and polishing progression for different materials (metal, ceramic, resin) and why order matters.
- Margin integrity: protecting and verifying margins during finishing.
- Surface texture, characterization and glaze or stain considerations.
- Quality checks before the case leaves the bench.
Domain 6: Selection and Application of Materials and Equipment for Crown & Bridge (21-23%)
Second heaviest. This is the "right material, right tool, right setting" domain.
- Matching restorative material to clinical situation, space, occlusion and esthetic demand.
- Alloy, ceramic and resin properties and their handling requirements.
- Equipment use and maintenance: furnaces, casting and pressing equipment, milling and digital hardware, handpieces and trimmers.
- Safety and infection control as they apply to materials and equipment in the lab.
- Troubleshooting when a material or machine produces a defect.
Domain 3: Design and Manufacture Patterns (Traditional or Digital) (17-19%)
Pattern work is where design decisions are locked in. Know both the wax and the digital routes.
- Wax-up principles: anatomy, occlusion, pontic design and connector dimensions for multi-unit work.
- Digital design logic: margin definition, spacer and thickness parameters, connector sizing.
- Sprue or support planning and pattern preparation for the next manufacturing step.
- Recognizing a flawed pattern before it becomes a flawed restoration.
Domain 4: Manufacture Restoration (Traditional or Digital) (11-13%)
Converting the pattern or design into a physical restoration.
- Investing, burnout, casting, pressing, milling and sintering concepts, and the variables that cause failure.
- Divestment and initial cleanup without damaging margins.
- Fit and accuracy checks on the master cast or model.
Domain 2: Manufacture Master Cast (Traditional or Digital) (10-12%)
Everything downstream depends on an accurate working cast.
- Pouring, pinning, sectioning and trimming; die preparation and relief.
- Articulation and mounting basics.
- Digital model workflows and where they depart from the stone-cast process.
Domain 1: Perform Preliminary & Diagnostic Work Up (9-11%)
Reading the case before touching it.
- Evaluating impressions, scans, prescriptions and opposing records for adequacy.
- Identifying problems that require contacting the dentist before proceeding.
- Documentation, case planning and communication.
Practical Exam Quick Facts
The practical is a separate component with its own logic, so keep its facts apart from the written exam in your notes.
- Fee: $650.
- Work time: 5 hours 15 minutes of timed work, plus advance preliminary work completed beforehand.
- Focus areas: preliminary work, waxing and metalwork, including three-unit bridge preparation.
- Grading: independently graded by three examiners.
- Passing rule: every required practical subtest must pass in the same administration.
- Where: a suitable dental laboratory with MonitorEDU remote proctoring, or a scheduled volunteer-host group site.
- Remote windows: January, March, May, July, September and November.
Key Takeaway
Because all required subtests must pass in the same administration, a weak area cannot be offset by strength elsewhere. Practice the three-unit bridge workflow end to end, and rehearse the preliminary work, so no single subtest becomes the reason for a repeat attempt.
For more on how candidates experience the difficulty of each component, see How Hard Is the CDT-CB Exam? Complete Difficulty Guide 2026.
Exam-Day Rules and Logistics
Written exam delivery
Written testing runs on the FastTest computer-based platform with MonitorEDU remote proctoring. Sessions are closed-book: no outside assistance, books, dictionaries or scratch paper, and there is no scheduled break. Plan accordingly for a 90-minute specialty session.
Remote testing checklist
- A private workspace.
- A compatible computer with webcam and audio.
- Reliable internet.
- A smartphone camera.
- Photo ID.
Calendar mechanics
- Written windows run monthly, with applications due by the 20th of the preceding month.
- Accommodation requests need supporting documentation and at least 30 days' advance written notice.
Because the application deadline falls in the month before the window, build your timeline backward from the month you want to test. CDT-CB Exam Dates 2026: Testing Windows, Deadlines & Scheduling covers scheduling in more detail.
Retakes, the Four-Year Clock and Renewal
If a written attempt does not pass
A candidate who fails a written exam must wait at least 30 days before reapplying and pays a new exam fee. NBC supplies the written passing requirement in candidate confirmation information, so check that rather than relying on a number you heard elsewhere. Our CDT-CB Passing Score 2026 article explains how to read that information, and CDT-CB Pass Rate 2026: What the Data Shows discusses what is and is not publicly known.
The four-year window
Initial components may be taken in any order, but all must be passed within four years of the first pass. An eligible current RG examination can substitute for the comprehensive within its four-year allowance. If you pass the specialty written first, start the clock mentally that day.
Annual renewal
Renewal is annual and includes a renewal fee, a legal and ethical attestation and 12 CE hours:
- 1 hour of Regulatory Standards
- 6 hours of Scientific, including at least 3 NBC-approved hours
- 5 additional allowable hours
Adding further specialties does not increase the annual CE requirement, which is a useful fact if you plan to expand beyond Crown and Bridge later.
Salary Context Without the Hype
The U.S. Bureau of Labor Statistics reports a median annual wage of $49,610 for dental laboratory technicians as of May 2025. That is occupation-wide context. It does not isolate crown and bridge specialists, and it should not be read as a CDT certification premium. Employers in this field are typically dental laboratories, and your actual pay depends on region, lab type, experience and the work you do. For a careful treatment of what can and cannot be concluded, see CDT-CB Salary Guide 2026: Complete Earnings Analysis and Is the CDT-CB Certification Worth It? Complete ROI Analysis 2026.
Scheduling Your Review Around the Blueprint
One short scheduling idea, driven by the weights: spend your first review blocks on the biggest domains, then circle back. Here is a sample sequence for a six-week window before your written test.
Domain 5 and Domain 6
- Finishing and polishing sequences by material.
- Material properties, equipment operation and defect troubleshooting.
- These two ranges alone span roughly 45% to 49% of the blueprint.
Domain 3 and Domain 4
- Wax and digital pattern design, connectors and pontics.
- Casting, pressing, milling and sintering failure modes.
Domain 1 and Domain 2
- Case evaluation, master cast accuracy and articulation basics.
Mixed practice and weak spots
- Timed sets of 90 questions in 90 minutes, closed-book, no breaks.
- Revisit the domain where your errors cluster.
For a fuller plan, see the CDT-CB Study Guide 2026: How to Pass on Your First Attempt, and use the CDT-CB practice questions to simulate the timing.
Frequently Asked Questions
The specialty written exam administers 90 questions in 1 hour 30 minutes. Of those, 80 are scored and 10 are unscored field-test items. All items are four-option, single-best-answer multiple choice, including completion-style stems.
The three exams in the standard initial route total $1,200: $275 for the specialty written, $275 for the comprehensive and $650 for the practical. An existing CDT adding a specialty pays $925 for its written and practical exams. Preparation, shipping, travel, renewal and retakes are separate costs.
Finish and Polish the Restoration is the largest domain at 24-26%, followed by Selection and Application of Materials and Equipment for Crown & Bridge at 21-23% and Design and Manufacture Patterns at 17-19%. NBC publishes these as ranges, so avoid treating them as fixed weights.
At least 30 days before reapplying, and a new exam fee applies. Remember that all initial components must be passed within four years of your first pass, so factor any retake into that window.
A renewal fee, a legal and ethical attestation and 12 CE hours: 1 Regulatory Standards, 6 Scientific (at least 3 NBC-approved) and 5 additional allowable hours. Earning additional specialties does not raise the annual CE requirement.