MDS PREP
In which of the following situations the alveolar ridge resorption is least
1. Anterior mandibular area with overdentures on canines
2. Anterior mandibular area with class IV lower RPD opposing the upper CD
3. Anterior maxillary area when upper CD versus a lower CD
4. None of the above
Prosthodontics
Answer: 1
In which of the following situations the alveolar ridge resorption is least: anterior mandibular area with overdentures on canines.
In a complete denture, the position of the mandibular first premolar is
determined by the
1. mental foramen
2. adjacent second premolar
3. termination of the mylohyoid ridge
4. mandibular canine
Prosthodontics
Answer: 4
Explanation: In the arrangement of teeth in a complete denture, the
mandibular first premolar is typically positioned with its mesial aspect in
contact with the lateral aspect of the mandibular canine. This is part of the
denture setup to ensure proper occlusal relationships and aesthetics.
Most semiadjustable articulators have a fixed intercondylar distance of
1. 200mm
2. 160mm
3. 70mm
4. 110mm
Prosthodontics
Answer: 4
Most semiadjustable articulators have a fixed intercondylar distance of 110mm.
Excessive vertical dimension (decreased interocclusal distance) results in
1. Improper retention of the denture
2. Senile appearance of face
3. Sagging of the corners of the mouth
4. Trauma to the residual ridges
Prosthodontics
Answer: 4
Excessive vertical dimension (decreased interocclusal distance) results in trauma to the residual ridges.
The posterior palatel seal for a maxillary complete denture
1. Is placed immediately posterior to the vibrating line
2. Is placed immediately anterior to the vibrating line
3. Is not necessary if a metal base is made
4. Will vary in outline and depth according to the palatal form
Prosthodontics
Answer: 4
The posterior palatal seal for a maxillary complete denture will vary in outline and depth according to the palatal form.
The concept of occlusion that maintains that the anteroposterior plane of occlusion should be parallel with the denture foundation and not dictated by the horizontal condylar guidance is called
1. Lingualised concept
2. Balanced concept
3. Neutrocentric concept
4. Mutually protected concept
Prosthodontics
Answer: 3
The neutrocentric concept of occlusion emphasizes that the occlusal plane should be parallel to the denture foundation and not influenced by the horizontal condylar guidance. This approach aims to achieve a more stable occlusion by focusing on the relationship between the occlusal plane and the supporting structures.
When acrylic resin is packed in the sandy stage, it may result in
1) Open bite
2) Porosity
3) Increased strength
4) All of the above
Prosthodontics
Answer: 2
Packing acrylic resin in the sandy stage, which refers to a stage where the material is not fully polymerized and has a grainy texture, can lead to porosity in the final product. This occurs because the incomplete packing can trap air bubbles, resulting in a porous structure that compromises the strength and integrity of the restoration.
Selective pressure impression technique indicated in
1. Firm healthy mucosal covering over the ridge
2. Flabby ridges
3. Knife edge with movable mucosa
4. When sharp bony spicules are present in the ridge
Prosthodontics
Answer: 1
Selective pressure impression technique is indicated in firm healthy mucosal covering over the ridge.