Page 1 of 64
HESI Dental Hygiene Exam 2026 Latest Update – 430
Verified Questions with 100% Correct Answers –
Comprehensive Exam Preparation Guide
Introduction
This document is a comprehensive HESI Dental Hygiene exam
study guide containing 430 verified questions and answers
covering the major concepts tested on the examination. It
includes microbiology, pharmacology, oral pathology,
periodontology, radiology, dental anatomy, nutrition, medical
emergencies, infection control, community dental health,
ethics, patient management, and clinical dental hygiene
procedures. The material is organized in a question-and-
answer format, making it ideal for rapid review, self-testing,
and final exam preparation.
Exam Questions and Answers
Dental needles are available in three lengths: long, short, and
ultrashort. The lower the cause number of the needle, the
smaller the diameter of the lumen --- correct precise answer -
--The first statement is true and the second is false
,Page 2 of 64
Which is the most common desensitizing agent found in over-
the-counter dentifrices? --- correct precise answer ---
Potassium nitrate
Pain threshold is the point at which an uncomfortable
stimulus is perceived as painful. Pain tolerance is the
maximum amount of pain a person can tolerate. --- correct
precise answer ---Both statements are true.
Which preservative ingredient is in local anesthesics? ---
correct precise answer ---Sodium bisulfite
Which strategy should be implemented for a patient who
presents with a sustain blood pressure reading of 160/100 mm
Hg with no previous history of hypertension? --- correct
precise answer ---Postpone treatment and refer patient to
physician of record.
Which oral hygiene index included all teething the assessment
and is used for plaque visualization and oral hygiene
motivation? --- correct precise answer ---O'Leary's Plaque
Control Record
Which is classified as an acquired disability? --- correct
precise answer ---Multiple sclerosis (MS)
Which is a developmental disability? --- correct precise
answer ---Chromosomal abnormality
,Page 3 of 64
Which should be obtained when physical restraint is
recommended for patient safety during a dental procedure? ---
correct precise answer ---Informed consent
Informed consent give permission from a patient, or legal
guardian, after the potential risks of treatment have been
explained. Implied consent occurs when a patient without a
formal agreement, consents to treatment through actions.
Informed refusal occurs when a patient declines treatment
after a tx plan is presented. Implied approval is not a legal
term used in dentistry.
Which person may give consent when presenting a treatment
plan for an incompetent adult? --- correct precise answer ---
Legal guardian
For elective dental procedures, in which trimester should a
pregnant patient be treated? --- correct precise answer ---
Second
When developing oral hygiene instruction for an elderly
patient, at what age should the education material be directed?
--- correct precise answer ---Functional
Functional age is based on performance capacities of the
patient; educational strategies are always based on a patient's
functional ability.
, Page 4 of 64
During a case presentation, which patient visual impairment
requires the clinician to be positioned to the patients side? ---
correct precise answer ---Macular degeneration
Which best describes the principal cause of the periodontitis?
--- correct precise answer ---Host response to bacterial plaque
biofilm
Which bony structure is initially destroyed by periodontitis? --
- correct precise answer ---Cortical plate of interdental
septum
The initial examination of a 45 yr old female reveals localized
advanced periodontitis. Which is the initial treatment? ---
correct precise answer ---Nonsurgical periodontal therapy
Which periodontal disease does NOT benefit from systemic
antibiotic treatment? --- correct precise answer ---Localized
advanced chronic
Which sequence of debridement is recommended for moderate
periodontitis (Case type III)? --- correct precise answer ---
Quadrant scaling and root planing in four treatment
appointments
HESI Dental Hygiene Exam 2026 Latest Update – 430
Verified Questions with 100% Correct Answers –
Comprehensive Exam Preparation Guide
Introduction
This document is a comprehensive HESI Dental Hygiene exam
study guide containing 430 verified questions and answers
covering the major concepts tested on the examination. It
includes microbiology, pharmacology, oral pathology,
periodontology, radiology, dental anatomy, nutrition, medical
emergencies, infection control, community dental health,
ethics, patient management, and clinical dental hygiene
procedures. The material is organized in a question-and-
answer format, making it ideal for rapid review, self-testing,
and final exam preparation.
Exam Questions and Answers
Dental needles are available in three lengths: long, short, and
ultrashort. The lower the cause number of the needle, the
smaller the diameter of the lumen --- correct precise answer -
--The first statement is true and the second is false
,Page 2 of 64
Which is the most common desensitizing agent found in over-
the-counter dentifrices? --- correct precise answer ---
Potassium nitrate
Pain threshold is the point at which an uncomfortable
stimulus is perceived as painful. Pain tolerance is the
maximum amount of pain a person can tolerate. --- correct
precise answer ---Both statements are true.
Which preservative ingredient is in local anesthesics? ---
correct precise answer ---Sodium bisulfite
Which strategy should be implemented for a patient who
presents with a sustain blood pressure reading of 160/100 mm
Hg with no previous history of hypertension? --- correct
precise answer ---Postpone treatment and refer patient to
physician of record.
Which oral hygiene index included all teething the assessment
and is used for plaque visualization and oral hygiene
motivation? --- correct precise answer ---O'Leary's Plaque
Control Record
Which is classified as an acquired disability? --- correct
precise answer ---Multiple sclerosis (MS)
Which is a developmental disability? --- correct precise
answer ---Chromosomal abnormality
,Page 3 of 64
Which should be obtained when physical restraint is
recommended for patient safety during a dental procedure? ---
correct precise answer ---Informed consent
Informed consent give permission from a patient, or legal
guardian, after the potential risks of treatment have been
explained. Implied consent occurs when a patient without a
formal agreement, consents to treatment through actions.
Informed refusal occurs when a patient declines treatment
after a tx plan is presented. Implied approval is not a legal
term used in dentistry.
Which person may give consent when presenting a treatment
plan for an incompetent adult? --- correct precise answer ---
Legal guardian
For elective dental procedures, in which trimester should a
pregnant patient be treated? --- correct precise answer ---
Second
When developing oral hygiene instruction for an elderly
patient, at what age should the education material be directed?
--- correct precise answer ---Functional
Functional age is based on performance capacities of the
patient; educational strategies are always based on a patient's
functional ability.
, Page 4 of 64
During a case presentation, which patient visual impairment
requires the clinician to be positioned to the patients side? ---
correct precise answer ---Macular degeneration
Which best describes the principal cause of the periodontitis?
--- correct precise answer ---Host response to bacterial plaque
biofilm
Which bony structure is initially destroyed by periodontitis? --
- correct precise answer ---Cortical plate of interdental
septum
The initial examination of a 45 yr old female reveals localized
advanced periodontitis. Which is the initial treatment? ---
correct precise answer ---Nonsurgical periodontal therapy
Which periodontal disease does NOT benefit from systemic
antibiotic treatment? --- correct precise answer ---Localized
advanced chronic
Which sequence of debridement is recommended for moderate
periodontitis (Case type III)? --- correct precise answer ---
Quadrant scaling and root planing in four treatment
appointments
