NBDHE Board Review Questions and
Answers Already Passed
What is the recommended angle for the toothbrush bristles when brushing?
✔✔At a 45-degree angle to the gumline.
What is the primary role of the dental hygienist during a scaling and root planing procedure?
✔✔To remove tartar and plaque from the tooth surfaces and beneath the gumline to reduce
inflammation and promote healing.
What are common symptoms of periodontal disease?
✔✔Persistent bad breath, gum recession, loose teeth, and bleeding gums.
How does Xylitol benefit oral health?
1
,✔✔It helps reduce the growth of bacteria that cause tooth decay and can decrease the formation
of cavities.
What is the significance of the DMFT index in dental health assessments?
✔✔It measures the number of Decayed, Missing, and Filled Teeth to assess overall dental health
and treatment needs.
How should a dental hygienist manage a patient with a history of heart disease during treatment?
✔✔Review the patient's medical history, ensure they are taking their medications as prescribed,
and potentially consult with their physician if needed.
What is the main difference between anteriors and posteriors in terms of dental radiographs?
✔✔Anterior teeth are shown in a vertical bitewing film, while posterior teeth are often displayed
in a horizontal bitewing film for better visibility of interproximal areas.
How often should patients with orthodontic appliances visit the dental hygienist for cleanings?
2
,✔✔Every 4-6 weeks, as braces and other appliances can trap food and plaque more easily.
What is the purpose of an oral cancer screening?
✔✔To detect any early signs of oral cancer, such as unusual sores or growths, to ensure early
diagnosis and treatment.
How should a dental hygienist respond to a patient who has a sensitive gag reflex?
✔✔Use smaller instruments, allow the patient to breathe through their nose, and consider using a
topical anesthetic to minimize discomfort.
What are the benefits of using antimicrobial mouth rinses?
✔✔They help reduce bacterial load, control plaque, and manage oral infections and bad breath.
What is the role of plaque control in preventing gingivitis?
3
, ✔✔Regular removal of plaque through brushing and flossing helps prevent the accumulation of
bacteria that cause gingivitis.
What dietary recommendations can help improve oral health?
✔✔Increase intake of crunchy fruits and vegetables, reduce sugary snacks, and maintain a
balanced diet rich in vitamins and minerals.
What is the primary function of dental sealants?
✔✔To protect the occlusal surfaces of teeth from decay by creating a barrier against bacteria and
food particles.
What should be done if a dental hygienist encounters a patient with a known allergy to a local
anesthetic?
✔✔Consult with the patient’s physician for an alternative anesthetic or pain management
strategy that is safe for the patient.
4
Answers Already Passed
What is the recommended angle for the toothbrush bristles when brushing?
✔✔At a 45-degree angle to the gumline.
What is the primary role of the dental hygienist during a scaling and root planing procedure?
✔✔To remove tartar and plaque from the tooth surfaces and beneath the gumline to reduce
inflammation and promote healing.
What are common symptoms of periodontal disease?
✔✔Persistent bad breath, gum recession, loose teeth, and bleeding gums.
How does Xylitol benefit oral health?
1
,✔✔It helps reduce the growth of bacteria that cause tooth decay and can decrease the formation
of cavities.
What is the significance of the DMFT index in dental health assessments?
✔✔It measures the number of Decayed, Missing, and Filled Teeth to assess overall dental health
and treatment needs.
How should a dental hygienist manage a patient with a history of heart disease during treatment?
✔✔Review the patient's medical history, ensure they are taking their medications as prescribed,
and potentially consult with their physician if needed.
What is the main difference between anteriors and posteriors in terms of dental radiographs?
✔✔Anterior teeth are shown in a vertical bitewing film, while posterior teeth are often displayed
in a horizontal bitewing film for better visibility of interproximal areas.
How often should patients with orthodontic appliances visit the dental hygienist for cleanings?
2
,✔✔Every 4-6 weeks, as braces and other appliances can trap food and plaque more easily.
What is the purpose of an oral cancer screening?
✔✔To detect any early signs of oral cancer, such as unusual sores or growths, to ensure early
diagnosis and treatment.
How should a dental hygienist respond to a patient who has a sensitive gag reflex?
✔✔Use smaller instruments, allow the patient to breathe through their nose, and consider using a
topical anesthetic to minimize discomfort.
What are the benefits of using antimicrobial mouth rinses?
✔✔They help reduce bacterial load, control plaque, and manage oral infections and bad breath.
What is the role of plaque control in preventing gingivitis?
3
, ✔✔Regular removal of plaque through brushing and flossing helps prevent the accumulation of
bacteria that cause gingivitis.
What dietary recommendations can help improve oral health?
✔✔Increase intake of crunchy fruits and vegetables, reduce sugary snacks, and maintain a
balanced diet rich in vitamins and minerals.
What is the primary function of dental sealants?
✔✔To protect the occlusal surfaces of teeth from decay by creating a barrier against bacteria and
food particles.
What should be done if a dental hygienist encounters a patient with a known allergy to a local
anesthetic?
✔✔Consult with the patient’s physician for an alternative anesthetic or pain management
strategy that is safe for the patient.
4
