MDS PREP
In anterior teeth "rests" are ideally prepared and located on
1) Incisal edges
2) Lingual surfaces
3) Mesial surfaces
4) Distal surfaces
Prosthodontics
Answer: 2
In anterior teeth, "rests" are ideally prepared and located on the lingual surfaces. This is because the lingual surfaces provide better support for the denture and distribute the occlusal forces more evenly across the palatal mucosa, reducing the risk of denture movement and discomfort.
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.
The mean denture bearing area in the edentulous mandible is approximately
1. 12.25 cm square
2. 16.25 cm square
3. 18.12 cm square
4. 20.25 cm square
Prosthodontics
Answer: 1
The mean denture bearing area in the edentulous mandible is approximately 12.25 cm square.
The relationship of the denture base that resists dislodgement of denture in the horizontal direction is
1. Stability
2. Pressure
3. Support
4. Retention
Prosthodontics
Answer: 1
Terms:
Stability:
Stability refers to the ability of a denture to resist horizontal
forces that may cause it to move or dislodge. A stable denture base
remains in place during function, such as chewing or speaking, and is
crucial for the overall comfort and effectiveness of the prosthesis.
Stability is influenced by the design of the denture, the fit of the
base, and the anatomy of the underlying tissues.
Pressure:
Pressure refers to the force exerted by the denture base against the
underlying tissues. While pressure is important for retention and
support, it does not specifically describe the resistance to horizontal
dislodgement.
Support:
Support refers to the resistance of the denture base to vertical
forces. It is provided by the underlying bone and soft tissues, ensuring
that the denture does not sink into the tissues under occlusal load.
Retention:
Retention is the ability of the denture to stay in place against
vertical dislodging forces. It is primarily influenced by factors such
as the fit of the denture, the use of adhesives, and the presence of
suction or interfacial tension between the denture base and the oral
tissues.
The buccal frenal attachment of mandibular CD should be trimmed and rounded to allow proper function of
1. Masseter
2. Buccinator
3. Triangularis
4. Zygomaticus major
Prosthodontics
Answer: 3
The buccal frenal attachment of mandibular CD should be trimmed and rounded to allow proper function of triangularis.
The main purpose of covering as much area as possible within functional limits by impression is to
1. Distribute the occlusal stresses and increase the peripheral seal
2. Increase the bulk of CD which helps to seat the denture
3. To increase the bulk of CD to prevent its fracture
4. All of the above
Prosthodontics
Answer: 1
The main purpose of covering as much area as possible within functional limits by impression is to distribute the occlusal stresses and increase the peripheral seal.
Most accurate reproducible relationship for recording jaw relation is
1. Physiologic rest position
2. Centric occlusion
3. Centric relation
4. Both B and C
Prosthodontics
Answer: 3
Most accurate reproducible relationship for recording jaw relation is centric relation.
Oral examination of an edentulous patient should include digital palpation. Why?
1. The arch form is more accurately evaluated
2. Undercut areas may be better evaluated
3. The ridge relationship may be better evaluated
4. None of the above
Prosthodontics
Answer: 2
Oral examination of an edentulous patient should include digital palpation to evaluate undercut areas better.