MDS PREP
Internal resorption in a tooth is seen as
1. Calcium hydroxide pulpotomy
2. Replacement resorption
3. Non-proliferation lesion
4. Desensitizing tooth
Prosthodontics
Answer: 3
Internal resorption in a tooth is seen as a non-proliferation lesion.
A patient with a -4mm overbite can be classified to have which type of malocclusion?
Prosthodontics Answer: 3
1. Deep bite
2. Crossbite
3. Openbite
4. Class II
A patient with a -4mm overbite can be classified to have an open bite.
Lateral throat form occupied by retromylohoid flange in lower denture
1) Has nothing to do with the denture
2) Should be large, one-half inch
3) Should be small, less than half inch
4) Should be larger, more than 2 inches
Prosthodontics
Answer: 2
The retromylohyoid area is an important anatomical region in the lower denture that contributes to the retention and stability of the denture. The lateral throat form, which is the space between the retromylohyoid flange and the surrounding tissues, should be adequately large (approximately one-half inch) to allow for proper function and comfort of the denture. A well-formed lateral throat area helps in achieving a good seal and prevents food impaction.
When recording jaw relations, the danger of displacing the baseplates can be
minimized by
1. fabricating wax occlusal rims
2. lining the baseplate with acrylic resin
3. fabricating compound occlusal rims
4. lining the baseplate with zinc oxide-eugenol impression paste
Prosthodontics
Answer: 4
Explanation: Lining the baseplate with zinc oxide-eugenol impression paste
provides a more stable and accurate fit during jaw relation records. This
material can help capture the contours of the underlying tissues and minimize
movement of the baseplate, thus reducing the risk of displacing it during the
recording process. The other options may not provide the same level of
stability.
The primary advantage of implant supported prosthesis is
1. decreased bulk of the prosthesis
2. improved phonetics
3. maintenance of alveolar bone
4. improved proprioception
Prosthodontics
Answer: 3
Explanation: Implant-supported prostheses have the advantage of maintaining
alveolar bone due to osseointegration. This helps preserve the natural bone
structure and reduces the risk of bone resorption that is common with
traditional complete dentures, which can lead to changes in the patient's facial
profile over time.
The impression material which would record the tissues with minimum pressure (mucostatic in nature) is
1. Zinc oxide eugenol
2. Plaster of Paris
3. Impression compound
4. All of the above
Prosthodontics
Answer: 2
The impression material which would record the tissues with minimum pressure (mucostatic in nature) is plaster of Paris.
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 most desirable temporary record base for an edentulous patient is the one
made from
1. shellac, reinforced with a 12 gauge stainless steel wire
2 cold cure resin by the sprinkle on method
3. polystyrene in a thermal vacuum machine
4. cold cure resin by the noncompression dough technique
Prosthodontics
Answer: 2
Explanation: The cold cure resin by the sprinkle-on method
provides a stable and accurate temporary record base for edentulous patients.
This method allows for better adaptation to the oral tissues and ensures a more
reliable fit during the recording of jaw relations.