MDS PREP
In making a final impression for a complete denture, the most important area of the impression is
1. Ridge area of maxilla and buccal shelf of mandible
2. Lingual border area of mandible
3. Junction of hard and soft palate of maxilla and distolingual area of mandible
4. Mid palatel area of maxilla and ridge of the mandible
Prosthodontics
Answer: 3
In making a final impression for a complete denture, the most important area of the impression is the junction of hard and soft palate of maxilla and distolingual area of mandible.
All of the following statements about denture stomatitis are true EXCEPT
1) It is usually not associated with a sore mouth
2) It is usually associated with wearing a denture at night
3) It is more common in diabetes
4) It is more common in men
Prosthodontics
Answer: 4
Explanation:
It is usually not associated with a sore mouth: This
statement is true. Denture stomatitis can occur without
significant soreness, although some patients may experience discomfort. The
condition is often asymptomatic, especially in its early stages.
It is usually associated with wearing a denture at night:
This statement is true. Wearing dentures continuously,
especially at night, can create a favorable environment for the growth of
Candida species, which is a common cause of denture stomatitis.
It is more common in diabetes: This statement is true.
Individuals with diabetes are at a higher risk for infections, including
oral candidiasis, which can lead to denture stomatitis.
It is more common in men: This statement is not
true. Denture stomatitis is generally more prevalent in women,
particularly postmenopausal women, due to hormonal changes that can affect
oral mucosa and immune response.
Which of the following is least likely to occur when record bases are formed
from self-curing resins, on the master
cast of an edentulous patient without blocking out the undercuts ?
1 The borders will not be accurately reproduced
2 Record bases will exhibit instability in the patients mouth
3 The casts may be abraded when removing the record bases
4 Record bases may break when removing from the casts
Prosthodontics
Answer: 1
Explanation: When record bases are formed from self-curing
resins without blocking out undercuts, the most likely issues are instability in
the mouth, abrasion of the casts, and potential breakage of the record bases
upon removal. However, the borders of the record bases are typically
well-defined and can be accurately reproduced even if undercuts are not blocked
out. Therefore, option 1 is the least likely occurrence.
Size of the bur for preparing lingual rest seat for an RPD is
1) 1/10th inch
2) 1/4th inch
3) 1/2 inch
4) 1 inch
Prosthodontics
Answer: 2
Explanation:
The appropriate size of the bur for preparing a lingual rest seat for a removable partial denture (RPD) is typically 1/4th inch. This size allows for the proper shaping and contouring of the rest seat to ensure a secure fit for the prosthesis.
One of the following rules explains about the grinding of certain cusps to produce balance in lateral movements
1) Ante"s rule
2) Bull rule
3) Wolf"s rule
4) Cieszynski"s rule
Prosthodontics
Answer: 2
The Bull rule pertains to the concept of occlusal balance during lateral
movements in dentistry. It suggests that certain cusps may need to be adjusted
or ground to achieve a balanced occlusion, particularly in the context of
removable prosthodontics or fixed restorations.
Ante's rule (option 1) relates to the relationship between the anterior and
posterior teeth in occlusion.
For long span distal extension bases where rigidity is critical the major connector of choice is
1) Palatal strap
2) Anteroposterior palatal bar
3) Closed horse-shoe
4) Horse-shoe
Prosthodontics
Answer: 3
A closed horse-shoe major connector provides increased rigidity and support for
long-span distal extension bases in removable partial dentures. It helps
distribute forces evenly and enhances the stability of the prosthesis.
Identify the wrong statement regarding salivary scan
1. Specifity is less than sialograms
2. Salivary scan is functional whereas sialagram is anatomical
3. When both are indicated scan is done first
4. When both are indicated sialogram is done first
Prosthodontics
Answer: 4
Identify the wrong statement regarding salivary scan: When both are indicated, sialogram is done first.
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.