MDS PREP
The following aslo serves in guiding path of insertion and path of removal along with guiding planes
1) Minor connector
2) Occlusal rest
3) Major connector
4) Clasps
Prosthodontics
Answer: 1
While guiding planes are the primary elements that dictate the path of insertion and removal, the minor connector also plays a role. The minor connector helps in the overall stability and retention of the RPD by linking the major connector to the abutment tooth and distributing the forces more evenly across the denture base. However, its primary function is not to guide the path of insertion and removal as much as it is to provide additional support and strength to the RPD.
On examination of a patient, in maxillary arch, posterior teeth and lateral incisors on both sides are missing. Canines are present and healthy. You would like to
1. Extract the remaining central incisors and go for an overdenture on canines
2. Fixed bridge for missing laterals and RPD for missing posteriors
3. Cantilever bridge for posteriors and RPD for laterals
4. All of the above
On examination of a patient, in the maxillary arch, posterior teeth and lateral incisors on both sides are missing. Canines are present and healthy. You would like to extract the remaining central incisors and go for an overdenture on canines.
Guiding planes are
1) Located adjacent to the edentulous area
2) Located far anterior to the edentulous area
3) Help in the stability of the denture
4) Provide a different path of insertion and removal
Prosthodontics
Answer: 1
guiding planes are flat, polished surfaces on the abutment teeth that guide the RPD along a specific path during insertion and removal. They are located adjacent to the edentulous area and are crucial for the proper seating and function of the denture.
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.
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.
Retromolar pad
1. Should not be covered by low denture
2. Should be covered by lower denture
3. Has tendon of temporal muscle attached to it
4. All of the above
Prosthodontics
Answer: 2
The retromolar pad should be covered by the lower denture.
The primary advantage of an immediate denture is that
1. centric relation (CR) is easier to record
2. less ridge resorption occurs as the ridges are subjected to early function
3. the patients can continue with their social activities without any embarrassment
4. artificial teeth can be set in identical Positions as those occupied by the natural teeth
Prosthodontics
Answer: 3
The primary advantage of an immediate denture is that the patients can continue with their social activities without any embarrassment.
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.