DHY 1281 FINAL EXAM 2026/2027 Actual Exam
Complete Questions and Answers Detailed
Rationales Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Dental Hygiene Theory & Patient Assessment | Q1 – Q10
Section 2 | Periodontics & Periodontal Disease Management | Q11 – Q20
Section 3 | Radiology & Image Interpretation | Q21 – Q30
Section 4 | Pharmacology & Local Anesthesia | Q31 – Q40
Section 5 | Ethics, Jurisprudence & Professional Practice | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
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SECTION 1: DENTAL HYGIENE THEORY & PATIENT ASSESSMENT Q1 – Q10
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Question 1 of 50
A 45-year-old patient presents for a new patient exam. Medical history reveals Type 2
diabetes controlled with metformin, blood pressure 138/88, and a history of smoking 10
cigarettes daily for 20 years. Intraoral exam reveals generalized 4-5 mm probing depths,
moderate bleeding on probing, and heavy calculus on the mandibular anteriors. The
patient reports brushing once daily and flossing "when I remember."
A. This patient has gingivitis and requires only a routine prophylaxis
B. The patient's diabetes is well-controlled so periodontal risk is minimal
C. This patient meets criteria for Stage II Grade B periodontitis and requires
comprehensive periodontal therapy ✓ CORRECT
D. Smoking has no significant impact on periodontal disease progression in diabetic
patients
Correct Answer: C
,Rationale: The combination of generalized 4-5 mm probing depths, bleeding on probing,
and risk factors including smoking and diabetes meets the criteria for Stage II
periodontitis with Grade B progression due to the presence of modifying factors. Option
A underestimates the disease severity because probing depths exceeding 3 mm with
attachment loss indicate periodontitis rather than gingivitis. Diabetic patients who
smoke have a significantly elevated risk for periodontal destruction and require careful
risk assessment at every recall.
Question 2 of 50
A 28-year-old female patient presents for her six-month recall appointment. She reports
that she has been pregnant for 14 weeks and has noticed increased bleeding when
brushing. Clinical examination reveals generalized erythema and edema of the gingival
margins, spontaneous bleeding on gentle probing, and no attachment loss. Plaque
accumulation is moderate.
A. These findings are consistent with pregnancy-associated gingivitis and require
improved home care with possible scaling ✓ CORRECT
B. The patient has developed early-onset periodontitis due to hormonal changes
C. Antibiotic therapy is indicated to eliminate the bacteria causing the inflammation
D. The bleeding is caused by a vitamin K deficiency common in the second trimester
Correct Answer: A
Rationale: Pregnancy-associated gingivitis is characterized by exaggerated
inflammatory response to plaque due to elevated progesterone and estrogen,
presenting with erythema, edema, and bleeding without attachment loss. Option B is
incorrect because the absence of clinical attachment loss and probing depths greater
than 3 mm rules out periodontitis. Scaling and improved oral hygiene are safe during
pregnancy and should be performed to reduce inflammation, though elective dental care
is often deferred until the second trimester.
,Question 3 of 50
A 62-year-old male patient with a prosthetic heart valve placed 3 years ago presents for
routine periodontal maintenance. He takes warfarin daily with an INR of 2.8. Several
teeth have heavy subgingival calculus requiring instrumentation. The patient has no
other medical conditions and reports no bleeding disorders.
A. Dental treatment must be postponed until the INR is below 2.0 to prevent excessive
bleeding
B. Prophylactic antibiotics are no longer recommended for patients with prosthetic
valves
C. The patient should discontinue warfarin for 3 days before the appointment
D. Routine periodontal instrumentation can proceed with local hemostatic measures
and antibiotic prophylaxis ✓ CORRECT
Correct Answer: D
Rationale: Current guidelines support dental procedures for patients on warfarin with an
INR up to 3.5 or 4.0, provided local hemostatic measures are available, and prosthetic
heart valves still require antibiotic prophylaxis per AHA guidelines. Stopping warfarin for
a dental cleaning places the patient at unnecessary risk for thromboembolism, and an
INR of 2.8 is within acceptable limits for routine periodontal instrumentation. Local
measures such as gauze pressure, oxidized cellulose, or suturing are typically sufficient
to manage postoperative bleeding.
Question 4 of 50
A 34-year-old patient with a history of rheumatic fever in childhood presents for a dental
hygiene assessment. The patient has a heart murmur but no known valvular disease
and has not seen a cardiologist in 15 years. The patient requires scaling and root
planing for localized periodontitis.
A. Antibiotic prophylaxis is mandatory for all patients with any history of rheumatic fever
, B. The hygienist should consult with the patient's physician to determine current cardiac
status before prescribing prophylaxis ✓ CORRECT
C. Rheumatic fever history alone never requires antibiotic prophylaxis for dental
procedures
D. The patient can proceed without prophylaxis because 15 years have passed since the
illness
Correct Answer: B
Rationale: A history of rheumatic fever may result in undiagnosed valvular damage that
places the patient at risk for infective endocarditis, making physician consultation
essential before determining prophylaxis needs. Option A is overly broad because not all
rheumatic fever patients develop cardiac involvement, and option C ignores the
possibility of latent valvular disease. The 2007 AHA guidelines emphasize that
prophylaxis is determined by the patient's current cardiac condition rather than the
remote history alone.
Question 5 of 50
A 19-year-old college student presents with complaints of bad breath and a bad taste in
the mouth. Clinical examination reveals generalized moderate plaque, erythematous
gingival margins, and no attachment loss. A periodontal screening and recording
examination shows all sextants code 1 or 2 with no code 3 or 4.
A. This patient requires immediate referral to a periodontist for comprehensive
evaluation
B. The PSR codes indicate localized periodontitis requiring scaling and root planing
C. The findings are consistent with generalized gingivitis treatable with prophylaxis and
oral hygiene instruction ✓ CORRECT
D. Bad breath in a young adult always indicates an underlying systemic disease
Correct Answer: C
Rationale: PSR codes 1 and 2 indicate gingival inflammation and calculus without
pockets exceeding 3.5 mm, which is consistent with gingivitis rather than periodontitis.
Complete Questions and Answers Detailed
Rationales Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Dental Hygiene Theory & Patient Assessment | Q1 – Q10
Section 2 | Periodontics & Periodontal Disease Management | Q11 – Q20
Section 3 | Radiology & Image Interpretation | Q21 – Q30
Section 4 | Pharmacology & Local Anesthesia | Q31 – Q40
Section 5 | Ethics, Jurisprudence & Professional Practice | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: DENTAL HYGIENE THEORY & PATIENT ASSESSMENT Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 45-year-old patient presents for a new patient exam. Medical history reveals Type 2
diabetes controlled with metformin, blood pressure 138/88, and a history of smoking 10
cigarettes daily for 20 years. Intraoral exam reveals generalized 4-5 mm probing depths,
moderate bleeding on probing, and heavy calculus on the mandibular anteriors. The
patient reports brushing once daily and flossing "when I remember."
A. This patient has gingivitis and requires only a routine prophylaxis
B. The patient's diabetes is well-controlled so periodontal risk is minimal
C. This patient meets criteria for Stage II Grade B periodontitis and requires
comprehensive periodontal therapy ✓ CORRECT
D. Smoking has no significant impact on periodontal disease progression in diabetic
patients
Correct Answer: C
,Rationale: The combination of generalized 4-5 mm probing depths, bleeding on probing,
and risk factors including smoking and diabetes meets the criteria for Stage II
periodontitis with Grade B progression due to the presence of modifying factors. Option
A underestimates the disease severity because probing depths exceeding 3 mm with
attachment loss indicate periodontitis rather than gingivitis. Diabetic patients who
smoke have a significantly elevated risk for periodontal destruction and require careful
risk assessment at every recall.
Question 2 of 50
A 28-year-old female patient presents for her six-month recall appointment. She reports
that she has been pregnant for 14 weeks and has noticed increased bleeding when
brushing. Clinical examination reveals generalized erythema and edema of the gingival
margins, spontaneous bleeding on gentle probing, and no attachment loss. Plaque
accumulation is moderate.
A. These findings are consistent with pregnancy-associated gingivitis and require
improved home care with possible scaling ✓ CORRECT
B. The patient has developed early-onset periodontitis due to hormonal changes
C. Antibiotic therapy is indicated to eliminate the bacteria causing the inflammation
D. The bleeding is caused by a vitamin K deficiency common in the second trimester
Correct Answer: A
Rationale: Pregnancy-associated gingivitis is characterized by exaggerated
inflammatory response to plaque due to elevated progesterone and estrogen,
presenting with erythema, edema, and bleeding without attachment loss. Option B is
incorrect because the absence of clinical attachment loss and probing depths greater
than 3 mm rules out periodontitis. Scaling and improved oral hygiene are safe during
pregnancy and should be performed to reduce inflammation, though elective dental care
is often deferred until the second trimester.
,Question 3 of 50
A 62-year-old male patient with a prosthetic heart valve placed 3 years ago presents for
routine periodontal maintenance. He takes warfarin daily with an INR of 2.8. Several
teeth have heavy subgingival calculus requiring instrumentation. The patient has no
other medical conditions and reports no bleeding disorders.
A. Dental treatment must be postponed until the INR is below 2.0 to prevent excessive
bleeding
B. Prophylactic antibiotics are no longer recommended for patients with prosthetic
valves
C. The patient should discontinue warfarin for 3 days before the appointment
D. Routine periodontal instrumentation can proceed with local hemostatic measures
and antibiotic prophylaxis ✓ CORRECT
Correct Answer: D
Rationale: Current guidelines support dental procedures for patients on warfarin with an
INR up to 3.5 or 4.0, provided local hemostatic measures are available, and prosthetic
heart valves still require antibiotic prophylaxis per AHA guidelines. Stopping warfarin for
a dental cleaning places the patient at unnecessary risk for thromboembolism, and an
INR of 2.8 is within acceptable limits for routine periodontal instrumentation. Local
measures such as gauze pressure, oxidized cellulose, or suturing are typically sufficient
to manage postoperative bleeding.
Question 4 of 50
A 34-year-old patient with a history of rheumatic fever in childhood presents for a dental
hygiene assessment. The patient has a heart murmur but no known valvular disease
and has not seen a cardiologist in 15 years. The patient requires scaling and root
planing for localized periodontitis.
A. Antibiotic prophylaxis is mandatory for all patients with any history of rheumatic fever
, B. The hygienist should consult with the patient's physician to determine current cardiac
status before prescribing prophylaxis ✓ CORRECT
C. Rheumatic fever history alone never requires antibiotic prophylaxis for dental
procedures
D. The patient can proceed without prophylaxis because 15 years have passed since the
illness
Correct Answer: B
Rationale: A history of rheumatic fever may result in undiagnosed valvular damage that
places the patient at risk for infective endocarditis, making physician consultation
essential before determining prophylaxis needs. Option A is overly broad because not all
rheumatic fever patients develop cardiac involvement, and option C ignores the
possibility of latent valvular disease. The 2007 AHA guidelines emphasize that
prophylaxis is determined by the patient's current cardiac condition rather than the
remote history alone.
Question 5 of 50
A 19-year-old college student presents with complaints of bad breath and a bad taste in
the mouth. Clinical examination reveals generalized moderate plaque, erythematous
gingival margins, and no attachment loss. A periodontal screening and recording
examination shows all sextants code 1 or 2 with no code 3 or 4.
A. This patient requires immediate referral to a periodontist for comprehensive
evaluation
B. The PSR codes indicate localized periodontitis requiring scaling and root planing
C. The findings are consistent with generalized gingivitis treatable with prophylaxis and
oral hygiene instruction ✓ CORRECT
D. Bad breath in a young adult always indicates an underlying systemic disease
Correct Answer: C
Rationale: PSR codes 1 and 2 indicate gingival inflammation and calculus without
pockets exceeding 3.5 mm, which is consistent with gingivitis rather than periodontitis.
