Question 1

Which of the following is correct concerning tooth preparation for diastema closure with bonded porcelain restorations?

Options :

A : Keep all margins supragingival or equigingival

B : Full crown preparations are best used to close spaces

C : Subgingival interdental margins will allow for improved emergence profiles

D : Mini-wings must always be used to close a black triangle interdentally

Answer: C

Question 2

Of the following, what is the BEST treatment for a Class IV fracture of a lateral incisor with no pulp exposure and otherwise healthy teeth?

Options :

A : Bonding: this is the most conservative treatment for a Class IV fracture of this tooth

B : Provisional: this will allow you to assess the tooth-s long-term nerve health

C : Porcelain Jacket Crown: this will allow you to most closely match the adjacent teeth

D : Lithium disilicate crown: this provides the best complement of strength and esthetics

Answer: C

Question 3

The process of directing occlusal forces through the long axis of the teeth is known as axial:

Options :

A : Dissipation

B : Alignment

C : Tripodization

D : Loading

Answer: D

Question 4

Using the principles of golden proportion, the ideal width of a central incisor should be what percent of its length?

Options :

A : 65% - 69%

B : 70% - 74%

C : 75% - 79%

D : 80% - 84%

Answer: A

Question 5

As a general principle, how much enamel should be reduced for a porcelain veneer?

Options :

A : As much as necessary to facilitate fabrication of an esthetic restoration

B : Adequate reduction so the lab technician can block out undercuts

C : As much as necessary to decrease the need for temporization and improve bonding

D : No more than 1.0 mm of enamel should be removed

Answer: D

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