MDS PREP
In a denture wearing patient, there is
1. No bone resorption
2. Bone formation
3. Independent of denture, there is bone resorption
4. Initial bone resorption followed by bone formation
Prosthodontics
Answer: 3
In a denture wearing patient, there is independent of the denture, there is bone resorption.
Before registering face bow transfer, it is necessary to determine
1. Physiological rest space
2. Incisal guidance
3. Centric relation and centric occlusion
4. Terminal hinge axis opening
Prosthodontics
Answer: 4
Before registering face bow transfer, it is necessary to determine terminal hinge axis opening.
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.
Porosity occuring in the bulky portions of the heat-cured acrylic complete dentures is due to
1) Insufficient pressure application during packing
2) Time lag between packing and curing
3) Directly placing the packed resin in water at 100 degree
4) Using a fluid pour technique
Prosthodontics
Answer: 3
Porosity in heat-cured acrylic dentures can occur due to several factors, but the most significant cause in this context is the direct placement of the packed resin in water at high temperatures (100 degrees Celsius). When the packed resin is subjected to such conditions, it can lead to rapid polymerization and the formation of bubbles or voids within the material, resulting in porosity. This is because the heat causes the monomer to vaporize, and if the vapor cannot escape, it leads to trapped air pockets.
The relationship of the denture base that resists dislodgement of denture in the horizontal direction is
1. Stability
2. Pressure
3. Support
4. Retention
Prosthodontics
Answer: 1
Terms:
Stability:
Stability refers to the ability of a denture to resist horizontal
forces that may cause it to move or dislodge. A stable denture base
remains in place during function, such as chewing or speaking, and is
crucial for the overall comfort and effectiveness of the prosthesis.
Stability is influenced by the design of the denture, the fit of the
base, and the anatomy of the underlying tissues.
Pressure:
Pressure refers to the force exerted by the denture base against the
underlying tissues. While pressure is important for retention and
support, it does not specifically describe the resistance to horizontal
dislodgement.
Support:
Support refers to the resistance of the denture base to vertical
forces. It is provided by the underlying bone and soft tissues, ensuring
that the denture does not sink into the tissues under occlusal load.
Retention:
Retention is the ability of the denture to stay in place against
vertical dislodging forces. It is primarily influenced by factors such
as the fit of the denture, the use of adhesives, and the presence of
suction or interfacial tension between the denture base and the oral
tissues.
Which of the following is true regarding immediate complete dentures?
1. Dentures should be relined or remade in 6-12 months
2. The patient should not wear the dentures for the first 24 hours after extraction
3. Anterior try in should be done
4. Teeth should always be placed in the same position as natural teeth
Prosthodontics
Answer: 1
Which of the following is true regarding immediate complete dentures: dentures should be relined or remade in 6-12 months.
For a complete denture patient with Class III ridge relation, the freeway space
1. must be increased
2 .must be decreased
3.should be the same as for Class I
4. Do not set teeth for abnormal jaw relations
Prosthodontics
Answer: 2
Explanation: In Class III ridge relations, the freeway space
must be decreased to accommodate the altered jaw relationship and ensure proper
occlusion. This adjustment helps maintain functional stability and comfort for
the patient.
Distal end of the complete denture should be
1. On the vibrating line
2. 1-2 mm posterior to vibrating line
3. 1-2 mm anterior to the vibrating line
4. Should be always on the hard palate
Prosthodontics
Answer: 2
The distal end of the complete denture should be 1-2 mm posterior to the vibrating line.