MDS PREP
In a complete denture patient, which of the following is likely to cause difficulty in apposing the lips?
1. Decreased VDO (vertical dimension of occlusion)
2. Failure to provide adequate interocclusal distance
3. Excessive interocclusal distance
4. Decreased nose-chin distance
Prosthodontics
Answer: 2
In a complete denture patient, which of the following is likely to cause difficulty in apposing the lips: failure to provide adequate interocclusal distance.
Which are you NOT looking for when exploring the apical third of a canal?
1) Hypercementosis
2) Branches
3) Lateral canal openings
4) Internal root resorbtion
Prosthodontics
Answer: 1
Which are you NOT looking for when exploring the apical third of a canal: hypercementosis.
The muscle which trims the posterior lingual areas of the lower denture is
1. Genioglossus and stylohyoid muscle
2. Palatoglossus and superior constrictor
3. Mentalis and buccinator
4. Medial pterygoid muscle, lateral pterygoid muscle
The muscle which trims the posterior lingual areas of the lower denture is palatoglossus and superior constrictor.
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
Lateral throat form occupied by retromylohyoid flange in lower denture should be large, one-half inch.
The salivary glands having purely mucous secretions are
1. parotid
2. sublingual
3. submandibular
4. palatine
Prosthodontics
Answer: 4
The salivary glands having purely mucous secretions are palatine.
Abutment teeth in bilateral distal extension RPD should have all of the following except
1) Retention buccally on one side and lingually on the other side
2) Buccal and lingual retention bilaterally
3) Guiding planes parallel
4) Non-interfering occlusal rests
Prosthodontics
Answer: 1
In a bilateral distal extension RPD, abutment teeth are crucial for the stability and support of the prosthesis. However, it is not ideal to have retention buccally on one side and lingually on the other side as this can lead to tipping and rotation of the denture during function, compromising its stability. Instead, both buccal and lingual retention is preferred for a more balanced and predictable outcome.
When acrylic resin is packed in the sandy stage, it may result in
1) Open bite
2) Porosity
3) Increased strength
4) All of the above
Prosthodontics
Answer: 2
Packing acrylic resin in the sandy stage, which refers to a stage where the material is not fully polymerized and has a grainy texture, can lead to porosity in the final product. This occurs because the incomplete packing can trap air bubbles, resulting in a porous structure that compromises the strength and integrity of the restoration.
According to Monson’s spheric theory of occlusion, each cusp and incisal edge conforms to a segment of the sphere, 8 inches in diameter, with its center at the
1. sella
2. lambda
3. glabella
4. bregma
Prosthodontics
Answer: 3
According to Monson’s spheric theory of occlusion, each cusp and incisal edge conforms to a segment of the sphere, 8 inches in diameter, with its center at the glabella.