Study Guide & Practice Review – comprehensive exam revision
notes, practice questions with answers, and radiography safety
review
Introduction:
This document contains detailed revision material and practice
questions for the BDA Dental Radiography Certification exam. It
covers radiographic techniques, IRMER and IRR regulations,
radiation safety, panoramic and periapical imaging, QA
programmes, positioning techniques, image interpretation, and
common radiographic faults.
The material includes precise answer explanations designed for
exam preparation and revision. It also reviews key concepts in
dental radiography legislation, radiation dose, patient safety, and
image quality assurance frequently tested in certification
assessments.
Exam Questions and Answers
When using parallax in the horizontal plane... --- correct precise
answer ---a buccally positioned unerupted tooth will appear to
move in the opposite direction to the X-ray tubehead.
What are the main area(s) that must be addressed by a radiography
quality assurance programme? --- correct precise answer ---A
quality assurance programme must cover all aspects of dental
radiography, not just things like equipment.
, Which of the following is a key aim of a radiography QA
programme? --- correct precise answer ---Produce diagnostic
radiographs to a consistently high standard
What is the suggested 'dose constraint' for dental staff involved in
radiography? --- correct precise answer ---0.3msV for those
working in dental practice. The annual dose limit for a non-
classified worker (set out in the Ionising Radiation Regulations) is
20mSv, but that is far too high given the small doses we use in
dental radiography.
What piece of legislation is principally concerned with the safety of
workers and the general public? --- correct precise answer ---IRR is
the legislation that protects workers and the public
What piece of legislation is principally concerned with safety of
patients? --- correct precise answer ---IR(ME)R is concerned with
the safety of patients
What IR(ME)R 'named person' must justify each radiographic
exposure? --- correct precise answer ---The Practitioner must
gather all the information they need to make a decision. It is their
responsibility to justify each and every exposure, according to the
evidence and their clinical judgement.