The Comprehensive Written examination measures broad dental laboratory knowledge. The 2026 NBC handbook describes 160 scored multiple-choice questions plus 10 unscored field-test questions, with up to 2 hours and 45 minutes allowed.
| Domain | Current range | Study materials |
|---|---|---|
| Dental Laboratory Industry Regulations and Scope of Practice | 8-10% | Open references |
| Anatomy | 17-19% | Open available study tools |
| Terminology and Principles | 6-8% | View scope and status |
| Articulation | 6-8% | View scope and source guidance |
| Dental Laboratory Materials | 34-36% | View scope and status |
| Impressions and Models | 10-12% | View scope and status |
| Safe Working Practices | 12-14% | Open available references |
The Comprehensive examination also includes specialty-specific questions across Ceramics, Complete Dentures, Crown & Bridge, Digital Workflow, Implants, Orthodontics, and Partial Dentures.
Anatomy is currently the most developed Comprehensive Written subject. Open the Anatomy study area for a complete inventory, recommended starting point, tool descriptions, scope, and status.
| Tool | Current scope |
|---|---|
| Rapid Review | Facial and Oral Anatomy; Tooth Identification and Morphology |
| Study-Term Index | Both developed Anatomy topics |
| Figure Review | 28 Chapter 3 figures and 49 Chapter 4 figures |
| Browser Flashcards | 140 Facial and Oral Anatomy cards |
| Open-Response Recall Practice | Both developed Anatomy topics |
| Anki TSV | 140 Facial and Oral Anatomy cards |
Watch the CDT Study Club video series on YouTube alongside the written lessons.
Blueprint source: CDT Examination Handbook and Application, revised March 1, 2026, pages 21-22. Verify current requirements with the NBC before testing.