MDS PREP
Examination of patient revealed hyperplastic tuberosity touching the retromolar pad in mandibular rest position. You would like
1. Deepen the retromolar pad before construction of the CD
2. Reduce the tuberosity before constructing complete dentures
3. Both of the above
4. None of the above
Prosthodontics
Answer: 2
Examination of the patient revealed hyperplastic tuberosity touching the retromolar pad in the mandibular rest position. You would like to reduce the tuberosity before constructing complete dentures.
When loads are placed on the abutment tooth, all of the following result except
1) Widening if the periodontal ligament
2) Increase in the density of the cortical plates
3) Increase in the trabeculation of the alveolar bone
4) None of the above
Prosthodontics
Answer: 4
Effects of loading on the abutment tooth and the surrounding structures.
Widening of the periodontal ligament: When loads are
applied to a tooth, the periodontal ligament (PDL) experiences stress. This
can lead to a mild widening of the PDL space due to the mechanical loading
and adaptive responses of the tissues involved. Thus, this statement is
true.
Increase in the density of the cortical plates: When
there is functional loading, the cortical bone surrounding the teeth can
adapt by increasing in density (a process known as bone remodeling).
Increased loads can stimulate bone formation, leading to denser cortical
plates. This statement is also true.
Increase in the trabeculation of the alveolar bone:
Similar to the cortical plates, the trabecular (or cancellous) bone also
adapts to loads through a process of remodeling, often leading to increased
trabeculation during functional loading. This means denser and more
organized bone structure in response to the applied forces, which is true as
well.
None of the above: Given that all the previous
statements can be considered true in the context of what happens when loads
are applied to the abutment tooth, the option "None of the above" suggests
that all of the listed outcomes can occur with loading on the abutment
tooth, making option 4 the correct choice.
In summary, when loads are placed on the abutment tooth, all the mentioned
effects (widening of the periodontal ligament, increase in the density of the
cortical plates, and increase in the trabeculation of the alveolar bone) are
valid responses to mechanical stress. Therefore, the answer 4 (None of the
above) is correct because there are no false statements among the listed
outcomes.
The distofacial border of the mandibular complete denture is limited by the action of
1. Masseter
2. Genioglossus
3. Geniohyoid
4. Mylohyoid
Prosthodontics
Answer: 1
The distofacial border of the mandibular complete denture is limited by the action of masseter.
Because of the great length of this clasp it must be designed with additional sup port, usually in the form of an auxiliary bracing arm. Which clasp is this?
1. Ring clasp
2, Combination clasp
3. Fish hook clasp
4. Multiple circlet clasp
Prosthodontics
Answer: 1
A ring clasp is a type of clasp used in removable partial dentures that encircles the abutment tooth. Due to its length and the potential for movement, it often requires additional support, typically provided by an auxiliary bracing arm, to ensure stability and retention of the prosthesis. This design helps distribute forces more evenly and prevents dislodgment during function.
A patient wants new set of CD. The present set which he is wearing now is loose. Examination revealed papillary hyperplasia of palate. The first thing you would like to do
1. Cauterize the papillary growth so that palate is smooth
2. Use tissue conditioners on the maxillary denture for the abuses tissue
3. Making the impression for CD with mucocompressive materials
4. Tell the patient it is difficult to make CD for him
Prosthodontics
Answer: 2
A patient wants a new set of CD. The present set which he is wearing now is loose. Examination revealed papillary hyperplasia of the palate. The first thing you would like to do is use tissue conditioners on the maxillary denture for the abused tissue.
Treatment of choice for a patient with a maxillary complete denture with severe bilateral tuberosity undercuts
1. Remove both tuberosity undercuts
2. Remove the tissue on only one side if possible
3. Maintain the undercuts as they help in retention
4. Use an mucostatic impression material
Prosthodontics
Answer: 2
Treatment of choice for a patient with a maxillary complete denture with severe bilateral tuberosity undercuts is to remove the tissue on only one side if possible.
Which of the following is likely to occur if the VDO is increased in a cornplete denture patient?
1. Loss of lip fullness
2. Decreased nose-chin distance
3. Clicking of teeth
4. Loss of tone of facial tissues
Prosthodontics
Answer: 3
Which of the following is likely to occur if the VDO is increased in a complete denture patient: clicking of teeth.
If the clasp assembly is not being placed on a tooth adjacent to an edentulous
area, the minor connector must
be positioned
1. in the embrasure between two teeth
2. on the lingual surface of the tooth distal to the edentulous space
3. on the lingual surface of the tooth mesial to the edentulous space
4. on any tooth with a convex lingual surface
Prosthodontics
Answer: 1
Explanation: The minor connector should be positioned in the embrasure between
two teeth to provide adequate support and stability for the clasp assembly. This
positioning helps distribute forces evenly and maintains the integrity of the
prosthesis. The other options do not provide the same level of support.