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 effect of saliva on the denture prognosis
1. No effect
2. Affects denture retention
3. Tissue conditioners are indicated when there is reduction in salivary flow
4. None of the above
Prosthodontics
Answer: 2
The effect of saliva on denture prognosis affects denture retention.
Selective grinding for equilibrating complete dentures is best accomplished after processing when the dentures are
1) Rearticulated using original jaw relation record
2) Rearticulated with a new series of jaw relation
3) Equilibrated in the patient"s mouth
4) None of the above
Prosthodontics
Answer: 2
Selective grinding is a technique used to adjust the occlusion of complete dentures. It is best performed after the dentures have been processed and rearticulated with a new series of jaw relations to ensure that the occlusion is accurate and reflects the patient's current jaw relationship. This allows for more precise adjustments to be made, as the original records may not accurately represent the current occlusal relationship after processing.
Muscle which hasf influence on the formation of buccal frenum of maxilla
1. Levator anguli oris
2. Quardratus labli superioris
3. Triangularis
4. Inferiors
Prosthodontics
Answer: 1
The muscle which has influence on the formation of the buccal frenum of the maxilla is levator anguli oris.
Occlusal rims for making the jaw relations aids in all of the following except
1. Determination of the centric relation
2. Determinatin of the overjet
3. Orientation of plane of occlusion or Camper"s line
4. Estimation of freeway space
Prosthodontics
Answer: 4
Occlusal rims for making the jaw relations aid in all of the following except estimation of freeway space.
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.
Selective pressure impression technique indicated in
1. Firm healthy mucosal covering over the ridge
2. Flabby ridges
3. Knife edge with movable mucosa
4. When sharp bony spicules are present in the ridge
Prosthodontics
Answer: 1
Selective pressure impression technique is indicated in firm healthy mucosal covering over the ridge.
The posterior palatel seal for a maxillary complete denture
1. Is placed immediately posterior to the vibrating line
2. Is placed immediately anterior to the vibrating line
3. Is not necessary if a metal base is made
4. Will vary in outline and depth according to the palatal form
Prosthodontics
Answer: 4
The posterior palatal seal for a maxillary complete denture will vary in outline and depth according to the palatal form.