RG Exam Domains 2026: Complete Guide to All 8 Content Areas

What "Eight Domains" Really Means for the RG Exam

The Recognized Graduate (RG) designation is issued by the National Board for Certification in Dental Laboratory Technology (NBC). It is earned by passing the written RG examination, and it is aimed at dental laboratory technology students and recent graduates. If you are still orienting yourself, start with what RG certification is and what RG stands for, then come back here for the content map.

This guide organizes the RG material into eight headings. It is important to understand exactly where those eight come from, because candidates often assume a tidy, equally weighted eight-part blueprint exists. It does not.

• Domains 1-7 are the seven stable top-level subject headings in the detailed RG examination-content outline of the RG handbook (the Recognized Graduate Examination Handbook and Application, front matter revised March 1, 2026), found on PDF pages 13-19.
• Domain 8, Digital Workflow, preserves a preparation/reference heading on PDF page 20 of the same handbook. NBC also names it in the current RG introduction and in its description of the Comprehensive/Recognized Graduate exam.

For the broader picture of how this fits into your preparation, see our RG study guide. If you want a quick-reference companion once you know the domains, the RG cheat sheet condenses the must-know facts.

Exam Format, Fee and Delivery at a Glance

Knowing the container makes the content easier to prioritize. Here is what the handbook and NBC's application pages establish:

One honest caveat: the way the 160 questions and the ten field-test items combine into a delivered-versus-scored total is not fully resolved in the sources, so do not rely on a single "total questions" figure from a forum or a study site. The ungraded field-test items are indistinguishable from scored ones while you test, so treat every question as if it counts. For cost context, see the RG certification cost breakdown, and for the scoring side see RG passing score.

Remote proctoring logistics that affect your prep

Remote testing uses a selected 30-day window. You need a private workspace, a compatible internet-connected device, a smartphone, photo ID and your printed candidate letter. That 30-day scheduling window is not examination time; the exam itself is the two hours 45 minutes. Plan your technical setup early so it does not eat into your study weeks. Details on scheduling live in our RG exam dates guide, and eligibility is covered in RG requirements.

Domain 1: General

General is the broad foundation heading of the handbook's content outline. NBC's published general-content subdomains cover the knowledge every technician needs regardless of specialty, and in both retrieved views of the outline dental laboratory materials is the largest General area. That tells you where to spend your first and heaviest study hours.

Because General underpins everything else, weak materials knowledge will cost you points inside the specialty headings too. A question about a crown, a denture base or an implant component often tests a materials property under the surface.

Domains 2-7: The Six Specialty Areas

After General, the handbook outline moves through the specialty headings. NBC's descriptions of this exam mix six- and seven-specialty wording, one of the source inconsistencies noted later in this guide. The six specialty headings used here are Ceramics, Complete Dentures, Crown and Bridge, Orthodontics, Partial Dentures and Implants.

Domain 2: Ceramics

Domain 3: Complete Dentures

Domain 4: Crown and Bridge

Domain 5: Orthodontics

Domain 6: Partial Dentures

Domain 7: Implants

Domain 8: Digital Workflow

Digital Workflow is the heading most likely to cause confusion. The handbook preserves it as a preparation/reference heading on PDF page 20, and NBC's RG introduction also names it. But the sources do not establish it as an exhaustive, separately weighted exam domain, and no complete digital task list is available to publish here.

What does that mean in practice? Digital tasks also occur within other verified headings, such as crown and bridge, implants and dentures, where scanning, design software and computer-aided fabrication increasingly appear. So the sensible approach is to study digital concepts alongside each specialty rather than as a standalone block saved for the last week.

Why You Should Not Invent Percentage Weights

Many study sites publish crisp tables assigning a percentage to every domain. For the RG exam, the verified sources do not support a clean whole-exam percentage allocation, and preparation/reference headings do not establish exhaustive coverage. Here is what you can reliably say:

• General is the foundation heading and materials is its largest area.
• Six specialty headings follow, each with its own subset of content.
• Digital Workflow is retained as unweighted preparation material.
• Published General-subdomain percentages and specialty-subset percentages cannot be merged into overall exam weights.

This uncertainty is actually useful. It pushes you toward balanced preparation instead of gambling on a guessed weighting. If you are wondering how that affects difficulty, our RG exam difficulty guide discusses it, and the RG pass rate article explains why the limited historical figures (such as 79.66%, 94 of 118, for 2018 Form 11) should not be read as a current overall pass rate.

Version Conflicts in the Source Material

Because NBC revises its documents, you may encounter mismatched details. Two to watch:

1. Handbook revision dates. The extracted handbook text is revised March 1, 2026, but some rendered general-content pages retain a June 1, 2024 date and differ in subdomain names or ranges. When the two disagree, treat the most recent handbook as your guide and confirm with NBC.
2. Specialty count wording. NBC's shared exam description mixes six- and seven-specialty phrasing. Do not assume a seventh specialty exists beyond the handbook's headings.

The practical lesson: download the current handbook yourself from NBC and work from it, rather than trusting a secondhand summary, including this one, as the final authority.

Sequencing the Domains in Your Preparation

Generic study methods matter far less than ordering the content sensibly. A suggested sequence tied to the domain structure:

When you are ready to test yourself, use the RG practice test site to simulate one-best-answer questions across headings. Review missed items back to the specific handbook heading they came from, and repeat timed practice sessions as exam day approaches.

After the Exam: Designation and Renewal

Passing is only part of earning the designation. Eligible students may test during the year before graduation, but passage is required within one year after graduation, and the designation is awarded only upon proof of graduation. Eligibility also requires qualifying NBC-recognized dental technology education, English, high-school graduation or equivalent, acceptable ethical and legal standing, instructor verification and three nonrelative references.

To maintain RG status, you complete six CE hours annually: one documented Regulatory Standards hour plus five eligible Scientific, Professional Development or additional Regulatory Standards hours. Maintained RG status can continue indefinitely. The four-year CDT Comprehensive examination credit is a separate matter from RG validity. NBC's sources also contain a small conflict about when the relevant window starts: the overview ties it to graduation, while the handbook refers to the date of becoming an RG, so confirm the timing with NBC directly.

If you are weighing the credential's career value, see whether the RG certification is worth it, the RG salary guide and RG jobs. For a broader overview of the designation itself, try RG certification.

Frequently Asked Questions