MDS PREP
The purpose of plane of orientation is
1. To serve as a guide in establishing occlusal plane
2. To aid in measuring height and length of posterior teeth
3. Both A and B
4. None of the above
Prosthodontics
Answer: 1
The purpose of the plane of orientation is to serve as a guide in establishing the occlusal plane.
Fovea palatine are situated in
1. Hard palate
2. Soft palate
3. At the junction of hard and soft palate
4. Their position is not fixed
Prosthodontics
Answer: 2
Fovea palatine are situated in the soft palate.
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.
Instrument which has a 4 digit formulae;
1) angle former
2) hoe
3) hatchet
4) spoon excavator
Prosthodontics
Answer: 1
Instrument which has a 4 digit formulae is angle former.
When patient closes in centric occlusion if lower jaw is placed anteriorly in relation to upper jaw, it is called as
1. Normal occlusion
2. Centric occlusion
3. Pre normal occlusion
4. Centric relation
Prosthodontics
Answer: 3
When a patient closes in centric occlusion, if the lower jaw is placed anteriorly in relation to the upper jaw, it is called pre-normal occlusion.
First step in altering the abutment contour for clasp retention in RPD is
1) Placement of guiding planes after disking the proximal surfaces
2) Placement of occlusal rests after reducing the occlusal surface
3) Planning for placement of clasps after reducing the proximal surfaces
4) The abutment tooth is not contoured unless it is short
Prosthodontics
Answer: 1
Before altering the abutment contour for clasp retention, it is essential to establish the guiding planes. This is done by disking the proximal surfaces of the abutment teeth to create a flat, smooth surface that will guide the RPD during insertion and removal. Once the guiding planes are in place, the contour of the abutment can be altered to accommodate the placement of the retentive elements such as rests and minor connectors.
What is the significance of the path of insertion in removable
partial dentures?
1) It is the path followed by the denture from first contact until fully
seated
2) It indicates the direction of tooth extraction
3) It determines the color of the denture
4) It measures the size of the denture
Prosthodontics
Answer: 1
The path of insertion is crucial as it describes the trajectory the denture takes during placement, which is essential for ensuring proper fit and function.
Effective alternation in the abutment with short clinical crowns for proper clasp retention can be achieved by
1) Proper guiding planes
2) Restoring with full crown
3) Altering the height of contour
4) All of the above
Prosthodontics
Answer: 2
When dealing with short clinical crowns in RPD abutment teeth, restoring the teeth with full crowns can provide additional retentive surfaces and support for the clasp. This can be particularly useful when the available undercuts are limited, thereby enhancing the overall stability and retention of the prosthesis.