Complete denture Exam Latest 2025 with
Complete Answers!!
Impression objectives - ANSWER Preservation - pressure leads to soft tissue damage and
bone resorption
Support - maximum coverage like a snow shoe
Stability - must have a close adaptation to underlying mucosa to limit horizontal
movement of the denture
Retention - atomspheric pressure (peripheral seal), adhesion, cohesion, undercuts,
neuromuscular control
Esthetics - border thickness should satisfy facial contour and lip support
Final impression techniques - ANSWER 1. selective pressure - selected tissue is recorded
in a displaced/functional position (basically, pressure is selectively placed on the
peripheral borders and the relieved sections of the maxillary tray, where the tray is
relieved the tissues are recorded in their resting position in mucostatic)
2. mucostatic - all tissue is in resting/undisplaced position
3. pressure - all tissue is in a displaced/functional position
Ill effects of recording tissue in an excessively displaced position - ANSWER tissue will
unseat the denture when you return to resting position.
when tissue is held down in a displaced position, blood flow is limited and bone
resorption can occur
Sequence of making final impression - ANSWER 1. check health of denture bearing areas
2. try in custom tray and adjust the flanges 2-3mm short of the vestibule depth
3. border molding to make 3D denture borders to mimic peripheral roll
4. make final impression with a light body material to achieve selective pressure final
impression
, Criteria for successful impressions - ANSWER 1. anatomic and physiologic knowledge
2. successful, accurate border molding
3. maximum coverage of basal seat
4. accurate impression making - proper tray position + correct amount of material
Objectives in fabricating a cast - ANSWER Perserve the peripheral roll
Provide a protective rim around the cast = land area. 4-5mm wide.
Produce a dense cast of vacuum stone that's 10-15mm to permit flasking
The layer of sticky wax is applied _____ below the periphery for maxilla, _____ above
the periphery for mandible. - ANSWER 3mm, 3mm
The palatal shelf should be _____ to the bench top and ____mm below the superior
periphery of the boxing wax - ANSWER parallel, 15-20
The alveolar ridge should be ____ to the bench and ____ below the superior periphery
of the boxing wax - ANSWER parallel, 15-20mm
Wait for _____ for stone to set and immerse the cast impression into hot water for ____
minutes before separating. this is for? - ANSWER 1 hour, 5 mins, prevent fracture of
land area
Peripheral depth should be? - ANSWER 2-3mm deep throughout
Maxilla undercut areas are? - ANSWER frenum, buccal surface of tuberosity, rugae,
flabby portions of alveolar ridge
Complete Answers!!
Impression objectives - ANSWER Preservation - pressure leads to soft tissue damage and
bone resorption
Support - maximum coverage like a snow shoe
Stability - must have a close adaptation to underlying mucosa to limit horizontal
movement of the denture
Retention - atomspheric pressure (peripheral seal), adhesion, cohesion, undercuts,
neuromuscular control
Esthetics - border thickness should satisfy facial contour and lip support
Final impression techniques - ANSWER 1. selective pressure - selected tissue is recorded
in a displaced/functional position (basically, pressure is selectively placed on the
peripheral borders and the relieved sections of the maxillary tray, where the tray is
relieved the tissues are recorded in their resting position in mucostatic)
2. mucostatic - all tissue is in resting/undisplaced position
3. pressure - all tissue is in a displaced/functional position
Ill effects of recording tissue in an excessively displaced position - ANSWER tissue will
unseat the denture when you return to resting position.
when tissue is held down in a displaced position, blood flow is limited and bone
resorption can occur
Sequence of making final impression - ANSWER 1. check health of denture bearing areas
2. try in custom tray and adjust the flanges 2-3mm short of the vestibule depth
3. border molding to make 3D denture borders to mimic peripheral roll
4. make final impression with a light body material to achieve selective pressure final
impression
, Criteria for successful impressions - ANSWER 1. anatomic and physiologic knowledge
2. successful, accurate border molding
3. maximum coverage of basal seat
4. accurate impression making - proper tray position + correct amount of material
Objectives in fabricating a cast - ANSWER Perserve the peripheral roll
Provide a protective rim around the cast = land area. 4-5mm wide.
Produce a dense cast of vacuum stone that's 10-15mm to permit flasking
The layer of sticky wax is applied _____ below the periphery for maxilla, _____ above
the periphery for mandible. - ANSWER 3mm, 3mm
The palatal shelf should be _____ to the bench top and ____mm below the superior
periphery of the boxing wax - ANSWER parallel, 15-20
The alveolar ridge should be ____ to the bench and ____ below the superior periphery
of the boxing wax - ANSWER parallel, 15-20mm
Wait for _____ for stone to set and immerse the cast impression into hot water for ____
minutes before separating. this is for? - ANSWER 1 hour, 5 mins, prevent fracture of
land area
Peripheral depth should be? - ANSWER 2-3mm deep throughout
Maxilla undercut areas are? - ANSWER frenum, buccal surface of tuberosity, rugae,
flabby portions of alveolar ridge
