Dental Practice Quiz

When using dowel pins, which of the following is NOT a recommended practice?

• Placing them parallel to the long axis of the tooth preparation.

• Using petrolatum to prevent the stone base from adhering to the cast.

• Positioning curved dowels with the head extending 1-2mm into the impression of the prepared tooth.

• Placing dowels so that they impinge on the margins

In the Pindex system for creating removable dies, how many pins are typically used for each die, pontic, and terminal segment?

• One pin

• Two pins

• Three pins

• Four pins

According to the text, which of the following is a characteristic of a centric interference?

• It occurs during lateral movements of the mandible.

• It is a premature contact when the condyles are in their optimum position.

• It only causes deflection of the mandible in an anterior direction.

• It is the same as a working interference.

What is the primary purpose of using interocclusal records when setting condylar inclinations on a semi-adjustable articulator?

• To transfer the hinge axis from the skull to the instrument.

• To determine the precise location of the transverse horizontal axis.

• To transfer the terminal positions of the condyles from the skull to the instrument.

• To create a pantographic recording of mandibular movements.

When using a facebow, what is the purpose of the anterior reference point?

• To register condylar movement.

• To provide the vertical orientation of the facebow.

• To determine the hinge axis.

• To set the condylar inclination.

What is the recommended thickness for an interocclusal record made for articulation of casts?

• 1-2 mm

• 3-5 mm

• 6-8 mm

• 10 mm

According to the text, which material is most likely to cause voids in a stone cast due to its hydrophobic properties?

• Polyether

• Reversible hydrocolloid

• Polyvinyl siloxane

• Irreversible hydrocolloid

When preparing a tooth for a full veneer metal crown, where is the seating groove typically placed?

• On the occlusal surface

• On the axial surface with the greatest bulk

• On the proximal surface

• At the finish line

According to the text, what is a benefit of using MOD onlays over inlays?

• They are easier to prepare.

• They are more conservative of tooth structure.

• They protect teeth from high stress concentrations.

• They provide less retention.

When making a wax pattern with a cusp-fossa arrangement, which cusps are located first?

• The nonfunctional cusps.

• The maxillary buccal cusps.

• The mandibular lingual cusps.

• The mandibular buccal cusps.