NBDHE Dental Hygiene MCQ 3

Question 1

Fones (circular) toothbrushing technique is best recommended for:

Accepted Answer

Children learning to brush due to its simplicity, using large circular strokes on buccal surfaces with teeth occluded

Answer

Adult patients with deep periodontal pockets

Answer

Patients with gingival recession needing sulcular cleaning

Answer

All adult patients as the most effective technique

Question 2

When a dental hygienist refers a patient for evaluation of a suspicious oral lesion, which information is MOST important to document and communicate?

Accepted Answer

Size, location, color, surface texture, borders, duration, associated symptoms, and whether the lesion has changed since first noted

Answer

Only the patient's insurance information

Answer

A photograph without clinical description

Answer

Diagnosis and treatment plan before the referral

Question 3

Extrinsic tooth staining from chlorhexidine mouthrinse occurs through which mechanism?

Accepted Answer

Chlorhexidine binds to anionic salivary proteins and reacts with dietary chromogens (tannins, polyphenols) to form insoluble brown-black pigment deposits on tooth surfaces

Answer

Direct oxidation of tooth enamel by chlorhexidine

Answer

Reduction of salivary flow leading to plaque accumulation

Answer

Fluoride-chlorhexidine chemical reaction on enamel

Question 4

The principal fibers of the periodontal ligament (PDL) that are responsible for resisting intrusive forces on the tooth are:

Accepted Answer

Apical fibers, which radiate from the root apex to the surrounding alveolar bone, acting as a cushion against apical pressure

Answer

Oblique fibers

Answer

Alveolar crest fibers

Answer

Transseptal fibers

Question 5

A 16-year-old patient with bilateral gingival enlargement, delayed eruption of permanent teeth, and radiographic evidence of multiple follicular cysts should be evaluated for:

Accepted Answer

Cleidocranial dysplasia (dysostosis)

Answer

Down syndrome

Answer

Cyclic neutropenia

Answer

Papillon-Lefèvre syndrome

Question 6

Which principle of motivational interviewing (MI) is described when the dental hygienist says: 'It sounds like you're torn — you know smoking is harming your gums, but quitting feels overwhelming right now'?

Accepted Answer

Developing discrepancy — reflecting ambivalence to increase motivation for change

Answer

Rolling with resistance

Answer

Supporting self-efficacy

Answer

Expressing empathy through directive advice