Onlaying Cusps & Large Amalgam
Preparations Exam 2025 With 100%
Correct Answers
Why does evaluation of resistance form become complicated as preparation becomes less
conservative - CORRECT ANSWER✔✔Removal of all unsupported enamel would severely
compromise amalgam retention
Retention form decreases if cavity walls are _________ or _________ - CORRECT
ANSWER✔✔Shortened or removed
Primary retention is derived from _________ walls - CORRECT ANSWER✔✔Opposing walls
When considering the final outcome of a tooth, what are the three possible options - CORRECT
ANSWER✔✔- final restoration
- foundation restoration leading to a crown
- temporary/control restoration requiring re-evaluation and replacement at a later date
During what restoration should you maximize retention and resistance form so fracture
/dislodgment are minimized - CORRECT ANSWER✔✔The final restoration
What type of restoration is prepared in a manner that restorative material will serve in lieu of
tooth structure in subsequent procedures for developing a crown preparation - CORRECT
ANSWER✔✔Foundation Restoration (build up)
What is one important factor to keep in mind when doing a foundation restoration - CORRECT
ANSWER✔✔It must be independently retentive of the tooth structure that may be removed
during subsequent preparation
, Crown preparation requires uniform removal of how much tooth structure - CORRECT
ANSWER✔✔1 - 1.5 mm
What type of restoration is used to restore a tooth temporarily for caries control - CORRECT
ANSWER✔✔Temporary/caries control restoration
True or false, a temporary restoration can be dependent on remaining tooth structure
(unsupported) for support - CORRECT ANSWER✔✔True
True or false, when doing a temporary restoration you should maximize the amount of tooth
structure remaining - CORRECT ANSWER✔✔True
What are the types of force applied to a restoration - CORRECT ANSWER✔✔- compression
- tensile stress
- shear & compression combo (often results in fractures)
Capping weakened cusps with amalgam increases their what - CORRECT ANSWER✔✔Resistance
form
Cusp capping is required when facial/lingual extension is how far from the primary groove
toward the cusp tip - CORRECT ANSWER✔✔2/3 from the primary groove toward the cusp tip
True or false, capping a weak cusp reduces potential for tooth fracture - CORRECT
ANSWER✔✔True
What is the required reduction of a supporting cusp when cusp capping - CORRECT
ANSWER✔✔2 mm
Preparations Exam 2025 With 100%
Correct Answers
Why does evaluation of resistance form become complicated as preparation becomes less
conservative - CORRECT ANSWER✔✔Removal of all unsupported enamel would severely
compromise amalgam retention
Retention form decreases if cavity walls are _________ or _________ - CORRECT
ANSWER✔✔Shortened or removed
Primary retention is derived from _________ walls - CORRECT ANSWER✔✔Opposing walls
When considering the final outcome of a tooth, what are the three possible options - CORRECT
ANSWER✔✔- final restoration
- foundation restoration leading to a crown
- temporary/control restoration requiring re-evaluation and replacement at a later date
During what restoration should you maximize retention and resistance form so fracture
/dislodgment are minimized - CORRECT ANSWER✔✔The final restoration
What type of restoration is prepared in a manner that restorative material will serve in lieu of
tooth structure in subsequent procedures for developing a crown preparation - CORRECT
ANSWER✔✔Foundation Restoration (build up)
What is one important factor to keep in mind when doing a foundation restoration - CORRECT
ANSWER✔✔It must be independently retentive of the tooth structure that may be removed
during subsequent preparation
, Crown preparation requires uniform removal of how much tooth structure - CORRECT
ANSWER✔✔1 - 1.5 mm
What type of restoration is used to restore a tooth temporarily for caries control - CORRECT
ANSWER✔✔Temporary/caries control restoration
True or false, a temporary restoration can be dependent on remaining tooth structure
(unsupported) for support - CORRECT ANSWER✔✔True
True or false, when doing a temporary restoration you should maximize the amount of tooth
structure remaining - CORRECT ANSWER✔✔True
What are the types of force applied to a restoration - CORRECT ANSWER✔✔- compression
- tensile stress
- shear & compression combo (often results in fractures)
Capping weakened cusps with amalgam increases their what - CORRECT ANSWER✔✔Resistance
form
Cusp capping is required when facial/lingual extension is how far from the primary groove
toward the cusp tip - CORRECT ANSWER✔✔2/3 from the primary groove toward the cusp tip
True or false, capping a weak cusp reduces potential for tooth fracture - CORRECT
ANSWER✔✔True
What is the required reduction of a supporting cusp when cusp capping - CORRECT
ANSWER✔✔2 mm
