MDS PREP
The stability of the mandibular complete denture is enhanced
1. When the level of the occlusal plane is above the dorsum of the tongue
2. When the tongue rests on the occlusal surfaces of lowers at rest
3. When the lateral borders are extended below the external oblique ridge
4. All of the above
Prosthodontics
Answer: 2
The stability of the mandibular complete denture is enhanced when the level of the occlusal plane is above the dorsum of the tongue.
Identify the wrong statement regarding salivary scan
1. Specifity is less than sialograms
2. Salivary scan is functional whereas sialagram is anatomical
3. When both are indicated scan is done first
4. When both are indicated sialogram is done first
Prosthodontics
Answer: 4
Identify the wrong statement regarding salivary scan: When both are indicated, sialogram is done first.
The Camper’s plane passes from the
1. lateral commissure of the mouth to the inferior edge of the ear
2. orbitale to the middle of the tragus of the ear
3. ala of nose to the superior edge of the tragus of the ear
4. outer canthus of eye to the most poste rior point on the tragus of the ear
Prosthodontics
Answer: 3
The Camper’s plane passes from the ala of the nose to the superior edge of the tragus of the ear.
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.
Muscles involved in centric relation
1. Temporalis and masseter
2. Medial and lateral pterygoids
3. Temporalis and lateral pterygoid
4. None of the above
Prosthodontics
Answer: 1
Muscles involved in centric relation are temporalis and masseter.
Which of the following implant materials density equals that of the alveolar bone
1) Chromium-cobalt
2) Titanium alloy
3) Stainless steel alloy
4) Bioglass
Prosthodontics
Answer: 2
Titanium alloys are commonly used in dental implants due to their favorable properties, including biocompatibility and mechanical strength. The density of titanium alloys is relatively close to that of human alveolar bone, which helps in achieving a good integration (osseointegration) between the implant and the bone. Other materials listed, such as chromium-cobalt and stainless steel alloys, have different densities and are not as compatible with bone in terms of density and biological response. Bioglass, while biocompatible, is not typically used as a structural implant material in the same way as titanium.
To make an impression of hyperplastic tissue, one should
1. Use wax for impression
2. Use elastomeric impressions to displace the tissue
3. Ensure intimate contact of the impression material with the tissue
4. Use specially fitted tray
Prosthodontics
Answer: 3
To make an impression of hyperplastic tissue, one should ensure intimate contact of the impression material with the tissue.
The retention and stability of a complete denture may be compromised by
1. large and bulbous tuberosities
2. a deep lingual vestibule
3. absence of mylohyoid ridge
4. a high V- shaped palate
Prosthodontics
Answer: 4
Explanation: A high V-shaped palate can compromise the retention and
stability of a complete denture because it reduces the surface area for the
denture to contact and conform to the palate. This results in less suction and a
smaller seal, making the denture more likely to dislodge during function.