MDS PREP
What is the purpose of using undercut gauges in dental surveying?
1) To identify the amount of retentive undercut
2) To measure the size of the cast
3) To contour wax patterns
4) To clean the surveyor
Prosthodontics
Answer: 1
Undercut gauges are specifically designed to measure the amount of retentive undercut available on the cast.
The most important advantage of incomplete dentures, is the
1 low cost of their fabrication
2 less time required for their construction
3 preservation of the health of the TM joints
4 preservation o the maximum amount of ridge bulk with minimum of trauma and
swelling
Prosthodontics
Answer: 4
Of the four factors affecting balanced occlusion in complete dentures, which of the following can be altered by only a slight amount because of wide limitations of esthetics and physiologic factors?
1. Condylar inclinations
2. Compensating curve
3. Incisal guidance
4. Cuspal inclinations
Prosthodontics
Answer: 3
Of the four factors affecting balanced occlusion in complete dentures, which of the following can be altered by only a slight amount: incisal guidance.
Which survey line is placed in the occlusal third in both near and
far zones?
1) Medium survey line
2) Low survey line
3) High survey line
4) Diagonal survey line
Prosthodontics
Answer: 3
The high survey line is characterized by being positioned in the occlusal third of the tooth in both the near and far zones, which is important for determining the contour of the tooth.
Most semiadjustable articulators have a fixed intercondylar distance of
1. 200mm
2. 160mm
3. 70mm
4. 110mm
Prosthodontics
Answer: 4
Most semiadjustable articulators have a fixed intercondylar distance of 110mm.
Indirect retainers are situated
1) As far anteriorly from the fulcrum line
2) As close to the fulcrum line
3) At the canine region
4) At the mesial marginal ridge of the premolars in the class I case
Prosthodontics
Answer: 1
Indirect retainers are components of removable partial dentures that help to prevent the denture from dislodging during function. They are ideally placed as far anteriorly from the fulcrum line (the line around which the denture rotates) as possible. This positioning helps to provide stability and support to the denture, counteracting the forces that could dislodge it.
Excessive vertical dimension may affect
1. Encroaching the freeway space
2. Proper centric relation
3. Proper retention
4. All of the above
Prosthodontics
Answer: 4
Excessive vertical dimension may affect all of the above: encroaching the freeway space, proper centric relation, proper retention.
Before construction of the complete denture, patient"s natural dentition is evaluated because it helps in
1. Establishing vertical dimension
2. Arranging the teeth in balanced occlusion
3. Selection of form, shape, and size of the artificial teeth
4. All of the above
Prosthodontics
Answer: 3
Before construction of the complete denture, the patient's natural dentition is evaluated because it helps in all of the above: establishing vertical dimension, arranging the teeth in balanced occlusion, selection of form, shape, and size of the artificial teeth.