MDS PREP
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.
Closest speaking space in normal jaw relations is approximately
1. 0 to 1.5 mm
2. 1.5 to 3 mm
3. 3 to 6 mm
4. 6 to 9 mm
Prosthodontics
Answer: 2
Closest speaking space in normal jaw relations is approximately 1.5 to 3 mm.
The muscle which trims the posterior lingual areas of the lower denture is
1. Genioglossus and stylohyoid muscle
2. Palatoglossus and superior constrictor
3. Mentalis and buccinator
4. Medial pterygoid muscle, lateral pterygoid muscle
The muscle which trims the posterior lingual areas of the lower denture is palatoglossus and superior constrictor.
A tooth that has been out of function for a long time is used as abutment for a FPD. The continuous pain resulting from the tooth is mainly due to
1) Irritation of the pulp during preparation for retainer
2) Traction of the periodontal ligament fibres
3) Deflective occlusal contacts
4) Periapical inflammation
Prosthodontics
Answer: 2
When a tooth has been out of function for an extended period, it can experience changes in the periodontal ligament that supports it. The periodontal ligament is a fibrous connective tissue that connects the tooth to the bone and allows for a certain degree of movement. This movement is essential for the health of the ligament and the surrounding tissues. When a tooth is no longer subjected to the normal forces of biting and chewing, the periodontal ligament fibres can become weak or atrophied.
When this tooth is then used as an abutment for a fixed partial denture (FPD), it is once again exposed to the functional stresses that were previously absent. These stresses can cause traction on the periodontal ligament fibres, leading to pain and discomfort. The pain is mainly due to the sudden reintroduction of forces to the ligament that it is not accustomed to handling.
Excessive application of pressure on the posterior portion of the occlusal rim during jaw relations results in
1. Anterior open bite
2. Posterior open bite
3. Anterior deep bite
4. Unbalanced occlusion
Prosthodontics
Answer: 1
Excessive application of pressure on the posterior portion of the occlusal rim during jaw relations results in an anterior open bite.
Which of the following is true regarding immediate complete dentures?
1. Dentures should be relined or remade in 6-12 months
2. The patient should not wear the dentures for the first 24 hours after
extraction
3. Anterior try in should be done
4. Teeth should always be placed in the same position as natural teeth
Prosthodontics
Answer: 1
Explanation: Immediate complete dentures often require relining or remaking due
to the significant bone and tissue changes that occur during the initial healing
phase after tooth extraction. The reline helps to adapt the denture to the new
contours of the alveolar ridge, providing a more stable and comfortable fit.
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.
Penumbra in a processed film is related to
1. Magnification
2. Sharpness of image
3. Detail of the image
4. All of the above
Prosthodontics
Answer: 4
Penumbra in a processed film is related to all of the above: magnification, sharpness of image, detail of the image.