MDS PREP
For patients wearing CD the test for phonetics is best done at the time of
1) Before making wax rims
2) Recording jaw relations on the wax rims
3) At the time of try in stage of trial dentures
4) All of the above
Prosthodontics
Answer: 3
Which of the following statements about suture materials is correct?
1) Plain catgut is made from synthetic materials and is absorbed by hydrolysis.
2) Chromic catgut is more suitable than plain catgut for oral surgery due to its
prolonged tensile strength.
3) Polyglactin (Vicryl) is an absorbable, braided suture commonly used for
tension-free wound closure.
4) Non-absorbable sutures are absorbed by body tissues through enzymatic
degradation.
Oral and Maxillofacial Surgery
Answer: 3
Polyglactin (Vicryl) is an absorbable, braided suture commonly used for tension-free wound closure.
Fins or spines may be produced on a casting because of
1.cracks in the investment
2. too rapid heating of the mold
3. steam production which causes the walls of the mold to flake off
4. all of the above
Dental Material
Answer: 4
Fins or spines may be produced on a casting because of
1.cracks in the investment
2. too rapid heating of the mold
3. steam production which causes the walls of the mold to flake off
Untrue about ANUG
1. Common in Down"s syndrome
2. Intermediate spirochetes commonly seen in electron microscopic studies
3. If neglected, results in deepening of pocket
4. Treated by gingivo, plasty
Periodontics
Answer: 3
The optimal flow rate of coolant for sonic and ultrasonic subgingival scaling is
1) 1-11 mL/min
2) 14-23 mL/min
3) 24-32 mL/min
4) 34-40 mL/min
Periodontics
Answer: 2
The definite evidence of dentinogenesis imperfecta is
1) Defective enamel
2) Defective dentine
3) Obliterated pulp chambers
4) Increased rate of caries
Oral Pathology
Answer: 3
In thumb-sucking habit, posterior crossbite occurs due to
1) Loss of normal outward thrust of the tongue
2) Negative pressure within the oral cavity, which causes buccinator to force the maxillary molar palatally
3) Both A and B
4) Loss of oral seal
Orthodontics
Answer: 3
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.