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NEET MDS Quiz - Practice Test
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Practice Test

Prosthodontics - 3 Questions

1
Prosthodontics
Because of the great length of this clasp it must be designed with additional sup port, usually in the form of an auxiliary bracing arm. Which clasp is this?
1. Ring clasp
2, Combination clasp
3. Fish hook clasp
4. Multiple circlet clasp

📝 Explanation:

A ring clasp is a type of clasp used in removable partial dentures that encircles the abutment tooth. Due to its length and the potential for movement, it often requires additional support, typically provided by an auxiliary bracing arm, to ensure stability and retention of the prosthesis. This design helps distribute forces more evenly and prevents dislodgment during function.

2
Prosthodontics

The range of motion, as measured in millimeters, is least for the

1. pure hinge like opening and closing movement
2. protrusive movement
3. left lateral movement
4. Bennet movement

📝 Explanation:

Explanation:

Pure hinge-like opening and closing movement: The range of pure rotation in the temporomandibular joint (TMJ) was determined to be up to 1520 mm in the 1960s. However, recent research suggests that pure rotational movement may not occur. 

Protrusive movement: The normal range of motion for protrusive movement is 812 mm. 

Left lateral movement: The normal range of motion for left lateral movement is 812 mm. The normal range of motion for mouth opening is 3560 mm.

The average immediate Bennett shift was found to be 1.05 mm on the left side and 1.12 mm on the right side when firm guidance was used.

3
Prosthodontics

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

📝 Explanation:

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.

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