“150”, Aptitude Test Questions and Answers for Dental Therapist Grade II – MDA & LGA.
ABSTRACT
This book contains 150 premium
multiple-choice questions and answers developed to prepare candidates for
the TABIBU WA KINYWA NA MENO DARAJA LA II (Dental Therapist Grade II)
Public Service Recruitment Secretariat (PSRS) aptitude test for MDA and LGA
in Tanzania. The questions are designed to reflect the style and level of
difficulty commonly encountered in PSRS examinations, emphasizing critical
thinking, clinical decision-making, problem-solving, ethics, infection
prevention and control, oral pathology, dental emergencies, public health,
leadership, records management, and other competencies expected of a Dental
Therapist. Each question is accompanied by the correct answer and a detailed
rationale to reinforce understanding and improve analytical skills. This
resource serves as a comprehensive revision guide to help candidates strengthen
their knowledge, build confidence, and enhance their chances of success in the
recruitment process.
Prepared by: Dental
Therapist Grade II
Based in Dar-es-salaam.
0628729934.
Date: August 07, 2026
Dear applicants,
This collection of questions and answers
has been carefully prepared to help all of you to understand the key areas
tested during the interview. The goal is to provide a useful, and practical
study guide so you can all perform confidently and fairly in the selection
process. I wish you the best of luck, and may this resource support you in
achieving success!
Warm regards,
Dental Therapist Grade II
For Personal Use by Applicants Preparing
for MDA and LGA Dental Therapist Grade II interview at Public Service
Recruitment Service.
ALL
QUESTIONS ARE COMPILED TOGETHER.
1. A 28-year-old patient presents with spontaneous throbbing pain
in the lower first molar that persists for several minutes after exposure to
cold stimuli. Clinical examination reveals deep dental caries without swelling.
What is the MOST likely diagnosis?
A. Reversible pulpitis B. Chronic apical
periodontitis C. Irreversible pulpitis D. Acute gingivitis
Answer: C. Irreversible pulpitis
Rationale:
Spontaneous pain that lingers after removal of a thermal stimulus is
characteristic of irreversible pulpitis, indicating irreversible inflammation
of the dental pulp. Reversible pulpitis causes only brief pain after
stimulation, while chronic apical periodontitis primarily affects tissues
around the root apex and often presents with tenderness on percussion rather
than prolonged thermal pain. Acute gingivitis affects the gingiva rather than
the pulp and does not produce this pain pattern.
2. During extraction of a mandibular molar, the patient suddenly
complains of severe pain despite administration of local anaesthesia. What
should be the FIRST appropriate action?
A. Continue extraction quickly B.
Administer additional appropriate anaesthesia C. Refer immediately to a
regional hospital D. Prescribe analgesics before continuing
Answer: B. Administer additional
appropriate anaesthesia
Rationale:
Pain during extraction usually indicates inadequate anaesthesia rather than
treatment failure. The safest and most appropriate first action is to reassess
and reinforce anaesthesia before proceeding. Continuing despite pain is
unethical and unsafe, referral is unnecessary unless complications exist, and
analgesics do not provide immediate intraoperative pain control.
3. A patient with uncontrolled diabetes presents with facial
swelling, fever and severe dental pain associated with a grossly carious tooth.
Which management approach is MOST appropriate?
A. Delay treatment until swelling
subsides B. Perform scaling before extraction C. Initiate urgent management
and appropriate referral if necessary D. Advise warm saline mouth rinses only
Answer: C. Initiate urgent management and
appropriate referral if necessary
Rationale:
An uncontrolled diabetic patient with facial swelling and systemic signs has a
potentially serious odontogenic infection requiring prompt intervention.
Appropriate emergency management may include drainage, antimicrobial therapy
when indicated, removal of the source when feasible, and referral depending on
severity. Delaying treatment increases the risk of spreading infection.
4. Which instrument is MOST appropriate for removing supragingival
calculus during routine periodontal treatment?
A. Mouth mirror B. Dental excavator C.
Periodontal probe D. Sickle scaler
Answer: D. Sickle scaler
Rationale:
A sickle scaler is specifically designed for removal of supragingival calculus
due to its pointed working ends. A periodontal probe measures periodontal
pockets, a mouth mirror assists visibility, and a dental excavator removes
softened carious dentine rather than calculus.
5. A patient presents with diffuse swelling extending into the
submandibular space accompanied by difficulty swallowing. What is the MOST
appropriate immediate action?
A. Arrange urgent referral for advanced
management B. Schedule routine review after three days C. Begin polishing the
affected teeth D. Perform routine scaling before referral
Answer: A. Arrange urgent referral for
advanced management
Rationale:
Spread of odontogenic infection into fascial spaces with dysphagia may threaten
the airway and requires urgent management at a higher-level facility. Routine
dental procedures should not delay definitive treatment because airway
compromise and deep neck infections may develop rapidly.
6. Before sterilization, contaminated reusable dental instruments
should FIRST undergo which process?
A. Dry storage B. Chemical polishing C.
Cleaning to remove organic debris D. Lubrication of working surfaces
Answer: C. Cleaning to remove organic
debris
Rationale:
Organic material such as blood and saliva prevents effective sterilization by
shielding microorganisms. Thorough cleaning before sterilization is therefore
essential. Lubrication may be required for certain instruments later, but only
after proper cleaning.
7. A patient develops dizziness, sweating and pallor while seated
in the dental chair shortly before treatment begins. Which condition is MOST
likely?
A. Acute asthma attack B. Vasovagal
syncope C. Septic shock D. Epileptic seizure
Answer: B. Vasovagal syncope
Rationale:
The combination of pallor, sweating, dizziness and anxiety before treatment is
classic for vasovagal syncope. Recognition allows prompt management through
positioning, reassurance and monitoring. The presentation differs from
seizures, asthma or septic shock.
8. When documenting treatment in a patient's dental record, which
principle is MOST important?
A. Record only procedures requiring
payment B. Include only successful treatments C. Record information
accurately and immediately D. Record findings only after patient discharge
Answer: C. Record information accurately
and immediately
Rationale:
Clinical records are legal and professional documents. Accurate, timely
documentation ensures continuity of care, accountability and appropriate
communication among healthcare providers. Delayed or incomplete documentation
increases the risk of clinical and legal problems.
9. Which oral lesion should raise the GREATEST suspicion for
possible oral malignancy requiring prompt referral?
A. Painful aphthous ulcer healing within
one week B. Persistent ulcer lasting more than two weeks C. Localized
traumatic ulcer after biting D. Mild gingival inflammation around one tooth
Answer: B. Persistent ulcer lasting more
than two weeks
Rationale:
Any oral ulcer persisting beyond two weeks without obvious healing should be
investigated because persistent ulceration is an important warning sign for
oral cancer. Early recognition and referral greatly improve prognosis.
10. A patient requests extraction of a healthy permanent tooth for
non-medical reasons. What is the MOST ethical response?
A. Perform extraction after verbal
consent B. Decline immediately without explanation C. Ask another clinician
to perform it D. Assess the indication and counsel the patient before deciding
Answer: D. Assess the indication and
counsel the patient before deciding
Rationale:
Ethical dental practice requires balancing patient autonomy with beneficence
and non-maleficence. Removing a healthy tooth without valid clinical indication
may constitute unnecessary harm. Proper assessment and counselling should
precede any decision.
11. Which factor MOST increases the risk of developing dental
caries?
A. Frequent intake of fermentable sugars B.
Daily consumption of vegetables C. Drinking plain water regularly D. Routine
tongue cleaning
Answer: A. Frequent intake of fermentable
sugars
Rationale:
Frequent exposure to fermentable carbohydrates provides substrate for
cariogenic bacteria, resulting in acid production and enamel demineralization.
Frequency of sugar intake is often more important than total quantity consumed.
12. A Dental Therapist supervising junior staff notices repeated
failure to follow instrument sterilization procedures. What is the MOST
appropriate managerial response?
A. Ignore the issue if no infection
occurred B. Replace all instruments immediately C. Provide corrective
supervision and reinforce protocols D. Stop all clinical services indefinitely
Answer: C. Provide corrective supervision
and reinforce protocols
Rationale:
Supervision includes identifying unsafe practices, providing guidance and
ensuring adherence to infection prevention standards. Education and monitoring
improve compliance while protecting patients and staff.
13. Which indicator BEST reflects successful oral health promotion
within a community?
A. Increased purchase of toothbrushes
only B. Reduced prevalence of preventable oral diseases C. More patients
requiring tooth extractions D. Increased number of emergency visits
Answer: B. Reduced prevalence of
preventable oral diseases
Rationale:
The ultimate goal of health promotion is measurable improvement in population
health. Reduced incidence of preventable oral diseases demonstrates successful
prevention strategies rather than increased treatment demand.
14. Which personal protective equipment primarily protects the
clinician's eyes from splashes during dental procedures?
A. Surgical mask B. Surgical gown C.
N95 respirator D. Face shield or protective goggles
Answer: D. Face shield or protective
goggles
Rationale:
Dental procedures frequently generate droplets and debris capable of
contaminating the eyes. Protective eyewear or face shields significantly reduce
occupational exposure to infectious materials.
15. When managing inventory of dental materials, which practice BEST
minimizes service interruption?
A. Ordering only after supplies are
exhausted B. Maintaining appropriate stock records and reorder levels C.
Purchasing the largest quantity available annually D. Using supplies without
documentation
Answer: B. Maintaining appropriate stock
records and reorder levels
Rationale:
Accurate inventory management ensures continuous availability of essential
materials while reducing wastage and unnecessary expenditure. Reorder levels
allow timely procurement before shortages occur.
16. A child presents with pain in a newly erupted permanent molar
that has deep pits and fissures but no cavitation. Which preventive
intervention is MOST appropriate?
A. Tooth extraction B. Root canal
treatment C. Fissure sealant placement D. Crown preparation
Answer: C. Fissure sealant placement
Rationale:
Deep pits and fissures are highly susceptible to caries. Fissure sealants
create a protective barrier that prevents bacterial colonization and
significantly reduces future caries risk.
17. Which characteristic MOST distinguishes plaque from dental
calculus?
A. Plaque is mineralized while calculus
is soft B. Plaque is a soft bacterial biofilm C. Plaque forms only below the
gingiva D. Plaque develops only after tooth extraction
Answer: B. Plaque is a soft bacterial
biofilm
Rationale:
Dental plaque is a soft biofilm composed primarily of microorganisms embedded
in an extracellular matrix. If not removed, it may mineralize into calculus,
which cannot be eliminated by brushing alone.
18. Which communication approach is MOST effective when obtaining
informed consent?
A. Use technical terminology only B. Obtain
a signature before discussing treatment C. Provide information in
understandable language and allow questions D. Explain only treatment benefits
Answer: C. Provide information in
understandable language and allow questions
Rationale:
Valid informed consent requires that patients understand the procedure,
alternatives, risks and benefits. Communication should be clear, appropriate to
the patient's level of understanding and allow sufficient opportunity for
questions.
19. During routine examination, generalized bleeding on gentle
probing is observed without attachment loss. Which condition is MOST consistent
with these findings?
A. Advanced periodontitis B. Acute
periapical abscess C. Gingivitis D. Chronic osteomyelitis
Answer: C. Gingivitis
Rationale:
Bleeding on probing with no attachment loss is a hallmark of gingivitis.
Periodontitis involves destruction of supporting tissues and attachment loss,
while the other conditions present differently.
20. A Dental Therapist participating in Primary Health Care
activities is MOST likely to contribute by:
A. Providing oral health education and
preventive outreach B. Restricting services to hospital admissions C.
Focusing only on restorative procedures D. Limiting care to emergency
extractions
Answer: A. Providing oral health
education and preventive outreach
Rationale:
Primary Health Care emphasizes prevention, health promotion, community
participation and accessible services. Dental professionals play an important
role in education, early detection and preventive interventions at community
level.
21. Which patient is at the HIGHEST risk of developing infective
endocarditis following invasive dental procedures?
A. Healthy adolescent with orthodontic
appliances B. Adult with previous infective endocarditis C. Elderly patient
with treated gingivitis D. Young adult with reversible pulpitis
Answer: B. Adult with previous infective
endocarditis
Rationale:
Patients with a history of infective endocarditis are among those at highest
risk for recurrence and require careful assessment before invasive dental
procedures, following current clinical recommendations where applicable.
22. A patient becomes increasingly anxious before a minor oral
surgical procedure. Which approach is MOST appropriate?
A. Ignore the anxiety and begin treatment B.
Reassure the patient, explain the procedure and assess concerns C. Cancel all
appointments permanently D. Proceed without obtaining consent
Answer: B. Reassure the patient, explain
the procedure and assess concerns
Rationale:
Effective communication reduces anxiety, improves cooperation and strengthens
informed consent. Understanding the patient's concerns allows the clinician to
address misconceptions and improve treatment outcomes.
23. Which measure MOST effectively reduces cross-infection during
routine dental treatment?
A. Wearing gloves without changing them B.
Using disposable suction tips only C. Consistent application of standard
infection prevention precautions D. Cleaning instruments at the end of the
week
Answer: C. Consistent application of
standard infection prevention precautions
Rationale:
Standard precautions—including hand hygiene, appropriate PPE, sterilization,
surface disinfection and safe waste disposal—provide the most comprehensive
protection against cross-infection in dental practice.
24. When compiling monthly service reports, which characteristic is
MOST essential?
A. Reports should emphasize positive
outcomes only B. Reports should contain estimates instead of verified data C.
Reports should be prepared only when requested D. Reports should be accurate,
complete and submitted on time
Answer: D. Reports should be accurate,
complete and submitted on time
Rationale:
Timely, complete and accurate reporting supports planning, monitoring,
accountability and informed decision-making within MDA and LGA health services.
Reliable data are fundamental to effective health system management.
25. A patient presents with severe trismus, rapidly increasing
facial swelling and difficulty breathing after a dental infection. What is the
MOST appropriate priority?
A. Immediate emergency referral while
maintaining airway safety B. Routine antibiotic review after forty-eight hours C.
Schedule elective extraction the following week D. Perform dental polishing
before reassessment
Answer: A. Immediate emergency referral
while maintaining airway safety
Rationale:
Airway compromise is the highest priority in patients with severe odontogenic
infections causing trismus, progressive swelling and breathing difficulty.
Prompt emergency referral and airway management can be lifesaving, while
delaying definitive care significantly increases the risk of serious
complications.
26. A 35-year-old patient presents with a localized fluctuant
swelling adjacent to a lower premolar. The tooth is extremely tender to
percussion and does not respond to pulp vitality testing. Which diagnosis is
MOST consistent with these findings?
A. Acute apical abscess B. Reversible
pulpitis C. Chronic gingivitis D. Dentinal hypersensitivity
Answer: A. Acute apical abscess
Rationale:
An acute apical abscess commonly develops following pulpal necrosis, resulting
in localized accumulation of pus around the root apex. The affected tooth is
typically non-vital and extremely tender to percussion due to inflammation of
the periodontal ligament. Reversible pulpitis responds to vitality testing,
gingivitis affects only the gingiva, and dentinal hypersensitivity occurs in
vital teeth with exposed dentine rather than necrotic pulps.
27. Before administering local anaesthesia, which information
obtained from the patient is MOST critical for preventing a potentially
life-threatening complication?
A. Frequency of tooth brushing B.
History of drug allergies C. Number of previous dental fillings D. Preferred
appointment time
Answer: B. History of drug allergies
Rationale:
A history of allergy to local anaesthetic agents or related medications may
indicate the risk of severe hypersensitivity reactions, including anaphylaxis.
Identifying allergies before treatment allows the clinician to modify
management appropriately. Although oral hygiene and treatment history are
useful, they are far less critical than recognizing conditions that could
immediately threaten the patient's life.
28. A clinician notices that a sterilization pouch remains wet
immediately after completion of the autoclave cycle. What is the MOST
appropriate action?
A. Store the pouch immediately B. Dry it
using a towel before storage C. Consider the package compromised and reprocess
it D. Open it and use the instruments immediately
Answer: C. Consider the package
compromised and reprocess it
Rationale:
Moisture remaining inside or outside sterilization packaging may permit
contamination of sterile instruments through microbial wicking. Instruments in
wet packs should therefore be regarded as non-sterile and undergo complete
reprocessing. Simply drying or storing the package does not restore sterility
and may place patients at unnecessary risk.
29. During oral examination, a white patch on the lateral border of
the tongue cannot be removed by gentle scraping. What should the Dental
Therapist do FIRST?
A. Diagnose oral candidiasis immediately B.
Prescribe analgesics only C. Ignore the lesion if painless D. Arrange further
assessment or referral
Answer: D. Arrange further assessment or
referral
Rationale:
A persistent non-scrapable white lesion, particularly on the lateral border of
the tongue, warrants further evaluation because it may represent leukoplakia or
another potentially malignant disorder. While not every lesion is cancerous,
early assessment is essential. Assuming candidiasis without supporting features
or ignoring the lesion may delay diagnosis of serious disease.
30. Which principle BEST explains why dental plaque should be
removed regularly even when no pain is present?
A. Plaque permanently stains enamel B.
Plaque contributes to caries and periodontal disease C. Plaque weakens jaw
bones immediately D. Plaque prevents eruption of permanent teeth
Answer: B. Plaque contributes to caries
and periodontal disease
Rationale:
Dental plaque is the primary etiological factor for both dental caries and
inflammatory periodontal diseases. Its bacterial biofilm produces acids and
inflammatory mediators that damage teeth and supporting tissues over time,
often before pain develops. Preventive plaque control therefore remains a
cornerstone of oral healthcare.
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