MDS PREP
Plasma cell gingivitis is seen in individuals having the habit of chewing which of the following types of flavoured chewing gum?
1. Peppermint flavoured
2. Clove flavoured
3. Cinnamon flavoured
4. Banana flavoured
Periodontics
Answer: 1
Plasma cell gingivitis is seen in individuals who chew peppermint-flavored chewing gum.
ANUG is caused by
1. Borrelia vincenti and Fusobacterium
2. Actinomycetam comitans
3. Actinomyces naeslundii
4. Streptococcus mutans
ANUG is caused by Borrelia vincenti and Fusobacterium.
Mineralization of dental plaque normally proceeds from the
1. periphery towards the tooth surface
2. occlusal surface towards the root surface
3. tooth surface towards the surface of the plaque
4. centre of the plaque radially
Periodontics
Answer: 3
This process occurs due to the deposition of minerals, primarily calcium and
phosphate ions, in the presence of organic matrix components and bacteria within
the plaque.
Mineralization in dental plaque often starts at the interface between the tooth
surface and the plaque, where the organic matrix provides a substrate forthe
deposition of mineral ions.
As the process continues, the plaque can become increasingly calcified, with the
mineral content moving from the tooth surface outwards towards the surface of
the plaque.
This can lead to the formation oftartar or dental calculus, which is a hardened
deposit of mineralized plaque that can contribute to dental diseases like
gingivitis and periodontitis.
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
The Gracey curette is a dental instrument used for subgingival scaling and root planing. Correct adaptation of the curette involves placing it at the correct angle to the tooth surface to effectively remove plaque and calculus. The lower shank of the curette should be parallel with the tooth surface to allow for proper engagement with the tooth structure.
The outcome of results of laterally positioned flap depends on
1) Presence of sufficient bone support at donor site
2) Thickness of attached gingiva at donor site
3) Width of attached gingiva at donor site
4) All of the above
Periodontics
Answer: 4
Explanation:The success of a laterally positioned flap in periodontal surgery is influenced by several factors, including the presence of sufficient bone support at the donor site, the thickness of attached gingiva at the donor site, and the width of attached gingiva at the donor site. All these factors contribute to the healing and stability of the flap.
When doing instrumentation near the cementoenamel junction, cementum completely removed because it is
1. very thin in this area
2. usually softer than subgingival calculus
3. necrotic in the pocket
4. all of the above
Periodontics
Answer: 4
The cementum near the cementoenamel junction (CEJ) is indeed very thin, making
it more susceptible to removal during instrumentation. Additionally, cementum
can be softer than subgingival calculus, and in cases of periodontal disease, it
may become necrotic.
On which of the following tooth surfaces are initial prematurities in retruded contact position most common
1. Distobuccal cusps of maxillary first molars and mesiofacial cusps of mandibular first molars
2. Distal slopes of maxillary canines and mesial slopes of buccal cusps of mandibular first premolars
3. Distal inclines of buccal cusps of mandibular first premolars and mesial in clines of lingual cusps of maxillary first
premolars
4. None of the above
Periodontics
Answer: 3
Distal inclines of buccal cusps of mandibular first premolars and
mesial inclines of lingual cusps of maxillary first premolars
These specific occlusal surfaces are common areas where contacts can develop
prematurely, emphasizing the importance of careful occlusal adjustments.
Which one of the following holds good i case of iontophoresis
1) Sodium chloride is used in this technique
2) It is safe to use on people with pacemakers
3) The pulp tester is used for the electric charge
4) It encourages negative ions to penetrate the tooth ions
Periodontics
Answer: 4
Explanation: Iontophoresis is a technique that uses a small electric current to drive charged substances (ions) into tissues. In dentistry, it is often used to deliver fluoride ions into the tooth structure, and it specifically encourages negative ions to penetrate.