Update 2025-2026 Exam 270 Questions with
100% Verified Correct Answers Guaranteed A+
at what location must a certificate of dental assistant registration be prominently
displayed - CORRECT ANSWER: at each permanent practice location
define the dental assistant scope of practice - CORRECT ANSWER: in all instances, a
dentist is responsible for determining, on the basis of diagnosis, the specific treatment
patients will receive and which aspects of treatment may be delegated to qualified
personnel
define which procedures can be performed under general supervision - CORRECT
ANSWER: - extraoral services
- dental radiography
- intraoral suctioning
- use of a curing light
- intraoral camera
- intraoral digiting camera
dental hygiene committee - CORRECT ANSWER: - all matters regarding practice,
discipline, examination, education and licensure of hygienist reviewed by the committee
first
- 3 member committee: 2 hygienist and 1 dentist
direct supervision - CORRECT ANSWER: - the dentist must be present in the treatment
facility, but not necessarily the treatment room
do all states have the same laws, rules and regulations for dental assistants -
CORRECT ANSWER: no
,general supervision - CORRECT ANSWER: - the dentist does not have to be present in
the treatment facility
- a registered dental assistant who performed extra oral duties assigned by the dentist
how many hours of continuing education are required for renewal - CORRECT
ANSWER: 20 hours every 2 years
how many months does a dental assistant trainee have to successfully complete the
examination of infection control and jurisprudence - CORRECT ANSWER: 12 months
from the first date of employment
name procedures a dental assistant trainee cannot perform - CORRECT ANSWER: any
expanded function procedures
personal supervision - CORRECT ANSWER: - the dentist must be present in the
treatment room
- type of supervision required for all intramural services (except for dental radiographs,
intraroal suctioning and use of a curing light and intraoral camera
- dentist in room for intraoral functions
- another licensee or registrant in room for extraoral services
requirements for level 1 certification - CORRECT ANSWER: must complete training for
all level 1 procedures
requirements for level 2 certification - CORRECT ANSWER: - must become certified
level 1 provider
- must pass board-approved entrance exam
- must complete training for all level 2 procedures
,T/F: dentist are required to furnish dental records or copies of them to a patient -
CORRECT ANSWER: false
T/F: is it unethical to report a violation of the rules by another licensee or registrant -
CORRECT ANSWER: false, you must report
T/F: patient records must be kept at least 6 years after the last date of entry -
CORRECT ANSWER: true
T/F: the dentist must supervise and delegate the work of all personnel (both hygienist
and assistants) in a dental office - CORRECT ANSWER: false
T/F: the purpose of the Iowa practice review committee is to monitor impaired
practitioners - CORRECT ANSWER: true
under what level of supervision must a trainee always work - CORRECT ANSWER:
personal supervision
under what level of supervision must expanded functions be performed - CORRECT
ANSWER: direct supervision
what are the continuing education requirements for renewal - CORRECT ANSWER: - 2
hours of radiographs
- 1 hour jurisprudence
- 1 hour infection control
- CPR certification
- mandatory reporter training every 5 years
what are the provisions for public health supervision - CORRECT ANSWER: - the
dentist authorizes the services by a hygienist to a patient in a health setting
, what are the rules governing both the transfer of patient records and the retention of
patient records - CORRECT ANSWER: - must be retained for a minimum of 6 years
(adults)
- 6 years or age 19, whichever is longer (minors)
- copies must be provided upon patients request
- radiographs must be of diagnostic quality
what are the various categories of dental assistants - CORRECT ANSWER: trainee and
registered
what are things a registered dental assistant can be disciplined for by the Board -
CORRECT ANSWER: - quality of care
- communications
- record keeping
- infection control
- registration violation
- substance abuse
- fraud
- caused registration
- malpractice
- unprofessional practice
- practicing dentistry without a license
- not displaying your name within the office
what education, experience and training is required to complete level 1 and level 2
expanded function training - CORRECT ANSWER: - all expanded function procedure
training must be prior-approved by the board. The supervising dentist and dental
hygienist shall be responsible for maintaining in each office of practice documentation of
successful completion of the board approved training