MDS PREP
The secondary peripheral seal in mandibular denture is provided by
1. Buccal shelf
2. Anterior lingual border
3. Retromolar pad
4. Crest of the ridge
Prosthodontics
Answer: 2
The secondary peripheral seal in mandibular denture is provided by the anterior lingual border.
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.
According to the House classification, patients who are positive in their own
minds that they can never wear artificial dentures are classified as having
1 an indifferent mind
2 an exacting mind
3 a philosophical mind
4 a hysterical mind
Prosthodontics
Answer: 4
Explanation: The House classification categorizes patients
based on their attitudes towards dentures. Those with a "hysterical mind" are
often resistant to the idea of wearing dentures, believing they cannot adapt to
them. This classification helps clinicians understand patient psychology and
tailor their approach accordingly.
What does the term "height of contour" refer to in dental
surveying?
1) The lowest point of a tooth
2) The greatest circumference of a tooth at a selected axial position
3) The average height of all teeth
4) The position of the gum line
Prosthodontics
Answer: 2
The height of contour is defined as the line encircling a tooth that designates its greatest circumference at a specific axial position.
A non-rigid or semi-rigid connector is indicated in some posterior bridges
1) When span of the bridge is long
2) When draw of the retainers cannot be achieved due to non-parallelism of the abutments
3) When the abutment teeth are parallel in short span of bridge
4) None of the above
Prosthodontics
Answer: 2
Non-rigid or semi-rigid connectors are used in dental bridges when there is a need to accommodate non-parallel abutments (option 2). This design allows for some movement between the components of the bridge, which can help in achieving a better fit and function when the abutments are not parallel.
A complete denture wearing patient complains of tingling sensation in the lower premolar region. The ridges are resorbed. The most possible explanation
1. Pressure on the mucosa due to ridge resorption
2. Pressure on the mental foramen due to ridge resorption
3. Occlusal discrepancies due to ridge resorption
4. All of the above
Prosthodontics
Answer: 2
A complete denture wearing patient complains of tingling sensation in the lower premolar region. The ridges are resorbed. The most possible explanation is pressure on the mental foramen due to ridge resorption.
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.
Freeway space is defined as
1. Vertical dimension at rest - vertical dimension at occlusion
2. Vertical dimension of occlusion + vertical dimension at rest
3. Vertical dimension at rest
4. Vertical dimension at occlusion - vertical dimension at rest
Prosthodontics
Answer: 1
Freeway space is defined as vertical dimension at rest - vertical dimension at occlusion.