MDS PREP
The modiolus exerts its influence at canine and premolar region of complete dentures. Modiolus is formed by all of the following muscles except
1. Triangularis
2. Buccinator
3. Masseter
4. Orbicularis oris
Prosthodontics
Answer: 3
The modiolus exerts its influence at the canine and premolar region of complete dentures. Modiolus is formed by all of the following muscles except masseter.
All are consequences of edentulism except
1. Prognathic appearance
2. Thinning of lips
3. Decreased length of lip
4. Increase in columella-philtrum angle
Prosthodontics
Answer: 3
All are consequences of edentulism except decreased length of lip.
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.
Which muscle has dual function as related to CD
1. Masseter
2. Temporalis
3. Buccinator
4. Lateral pterygoid
Prosthodontics
Answer: 1
Which muscle has dual function as related to CD: masseter.
The most common reason why hyperplastic tissue is removed or reduced during construction of a complete denture because
1. It interferes with the arrangement of the teeth
2. It is unaesthetic to construct a denture on a hyperplastic tissue
3. It interferes with the stability of the denture
4. All of the above
Prosthodontics
Answer: 3
The most common reason why hyperplastic tissue is removed or reduced during the construction of a complete denture is that it interferes with the stability of the denture.
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.
Forces acting on the abutment tooth in an FPD can be effectively minimised by
1) Directing the forces perpendicular to long axis of the crown
2) Directing the forces along the long axis of the crown
3) Both of the above
4) None of the above
Prosthodontics
Answer: 2
Directing forces along the long axis of the crown is an effective way to minimize the stresses on an abutment tooth in a fixed partial denture (FPD). This allows the tooth to function more naturally and reduces the likelihood of complications such as root fracture or periodontal damage
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 denture bearing area is the part of the jawbone that supports a denture. In an edentulous (toothless) mandible, this area is crucial for the stability and retention of the denture. The mean value of 12.25 cm square is a commonly cited average for the surface area required for a well-fitting and functional lower denture. This area is important for distributing masticatory forces and providing sufficient space for denture construction.