MDS PREP
Which of part of the instrument should remain parallel (whenever possible) to the long axis of the tooth?
1. Blade
2. Cutting edge
3. Handle
4. Shank
Periodontics
Answer: 4
The part of the instrument that should remain parallel to the long axis of the tooth is the shank.
Which of the following is commonly seen in preschool children
1. ANUG
2. Herpetic gingivostomatitis
3. Juvenile periodontitis
4. None of the above
Periodontics
Answer: 2
Herpetic gingivostomatitis is commonly seen in preschool children.
Sensitivity of roots after periodontal surgery results from all of the following except
1) Exposed dentine tubules
2) Exposed cementum
3) Formation of plaque
4) None of the above
Periodontics
Answer: 2
After periodontal surgery, root sensitivity is primarily due to the exposure of dentin tubules (option 1). When the root surface is exposed, the dentin becomes sensitive to stimuli because the tubules can transmit sensations to the pulp.
Exposed cementum (option 2) is less likely to cause sensitivity because cementum is not as innervated as dentin. Formation of plaque (option 3) can lead to sensitivity as it may irritate the surrounding tissues and contribute to inflammation.
A Gracey curette is said to be correctly adapted when the
1. Handle is parallel to the long axis of the tooth
2. Angle of blade to the tooth is 40
3. Lower shank is parallel with the tooth surface being sealed
4. None of the above
Periodontics
Answer: 3
A Gracey curette is correctly adapted when the lower shank is parallel with the tooth surface being scaled.
Which of the following is the main constituent of plaque?
1. Calcium and phosphorus
2. Water
3. Microorganisms
4. Glycoproteins and monosaccharides
Periodontics
Answer: 3
Dental plaque is primarily made up of microbial communities, which play a
significant role in the development of dental diseases like caries and
periodontal disease.
The best indication for osseous grafts for bone regeneration procedure is
1. One-walled infrabony pockets
2. One-walled suprabony pockets
3. Two-walled infrabony pockets
4. Three-walled infrabony pockets
Periodontics
Answer: 4
The best indication for osseous grafts for bone regeneration procedures is three-walled infrabony pockets.
Which aspect of instrument determines whether to remove gross deposits of calculus
1) Angulation and flexibility of blade
2) Angulation and flexibilty of shank
3) Angulation and length of blade
4) Angulation and length of shank
Periodontics
Answer: 2
The angulation and flexibility of the shank are crucial in determining the ability of an instrument to remove gross deposits of calculus. The shank of a dental instrument, such as a scaler or curette, must be designed to allow for proper access and manipulation around the curves and contours of teeth to effectively remove calculus. While the blade also plays a role, the shank's design is more influential in reaching and adapting to the tooth's surface.
Which of the following procedures is least successful in resolving a periodontally related osseous defect
1. Osseous coagulum graft
2. Resection surgery
3. Reattachment procedure
4. Alloplast graft
The procedure least successful in resolving a periodontally related osseous defect is the reattachment procedure.