DDS Practice 2

Question 1

A patient presents with a fractured maxillary central incisor involving the pulp. The tooth is fully developed with a closed apex. What is the most appropriate initial treatment?

Accepted Answer

Root canal treatment

Answer

A fully developed tooth with pulp exposure from trauma is best treated with root canal therapy to prevent infection and preserve the tooth.

Question 2

When taking a full-mouth series of periapical radiographs, the paralleling technique is preferred over bisecting angle because it:

Accepted Answer

Produces less image distortion and more accurate representation

Answer

The paralleling technique minimizes geometric distortion because the film is parallel to the tooth's long axis and the X-ray beam is perpendicular to both.

Question 3

A 35-year-old patient has a 5 mm probing depth at a mandibular molar with bleeding on probing and 3 mm of clinical attachment loss. How would you classify this finding?

Accepted Answer

Stage II periodontitis

Answer

Stage II periodontitis is characterized by clinical attachment loss of 3–4 mm and probing depths of 5–6 mm.

Question 4

Which local anesthetic is CONTRAINDICATED in a patient with a documented allergy to para-aminobenzoic acid (PABA) derivatives?

Accepted Answer

Procaine

Answer

Procaine is an ester-type anesthetic that is metabolized to PABA, making it contraindicated in patients with PABA allergies.

Question 5

During a crown preparation, the dentist notices the preparation has a 2-degree taper. What is the clinical consequence?

Accepted Answer

The preparation may lack adequate retention

Answer

Optimal taper for crown preparations is 10–20 degrees; a 2-degree taper makes seating the crown difficult and may impede full seating.

DDS - Doctor of Dental Surgery Practice Test

DDS - Doctor of Dental Surgery Practice Test

DDS Practice 2