DANB RHS Exam Study Guide 2026–2027 | Radiation Health and Safety Dental Radiography Exam Prep (Digital Download)

A complete study guide for the DANB Radiation Health and Safety (RHS) exam, written to the current digital-radiography-only content outline for dental assistants who take dental radiographs.

What's Inside:

• Full content review in 7 sections and 25 topics, covering all three official domains: Purpose and Technique, Radiation Characteristics and Protection, and Infection Prevention and Control
• Image types, patient preparation, paralleling and bisecting-angle technique, error correction, mounting, Universal tooth numbering, and radiographic landmarks
• Radiation physics and biology, dose limits, ALARA, current ADA and FDA protection guidance, digital sensors and PSP plates
• Standard precautions, Spaulding classification, PPE sequences, and infection control for sensors, PSP plates and panoramic units
• 18 quick-reference tables and diagrams, including error-correction charts, bisecting-angle values, landmarks, and the operator position-and-distance rule
• 2 full-length practice tests with 200 exam-style questions weighted like the real exam, 4 choices each
• Detailed answer explanations for every question
• Exam overview, study schedules, test-taking strategies, FAQs, and a final review checklist

Format:

• Digital PDF, instant download
• Printable US Letter pages

This is an independent study resource and is not affiliated with or endorsed by the Dental Assisting National Board (DANB).