MDS PREP
Instrumentation zone in periodontal therapy is
1. The portion of the tooth where calculus (or) necrotic cementum is found
2. CE junction
3. Exposed root surfaces
4. Deep periodontal pocket
Periodontics
Answer: 1
The instrumentation zone in periodontal therapy is the portion of the tooth where calculus or necrotic cementum is found.
The type of bone present labial to anterior teeth is
1. spongy
2. cortical
3. cancellous
4. squamous
Periodontics
Answer: 1
The bone located labial to anterior teeth is typically compact bone but can be
described as spongy or cancellous in some contexts referring to the internal
structure, depending on proximity to the tooth roots.
The following most frequently forms at tooth-tissue interface following flap surgery or curettage
1. Scar formation
2. Adhesion of collagen fibres
3. Long junctional epithelium
4. Collagen fibres parallel to root surface
The most frequently formed tissue at the tooth-tissue interface following flap surgery or curettage is long junctional epithelium.
Psychosomatic factors play an important role in the etiology of
1. acute necrotizing ulcerative gingivitis
2. acute herpetic gingivostomatitis
3. juvenile periodontitis
4. acquired immunodeficiency syndrome
Periodontics
Answer: 1
Psychological stressors can contribute significantly to the onset and
exacerbation of acute necrotizing ulcerative gingivitis, which often occurs in
individuals under stress or with compromised immunity.
Guided tissue regeneration (GTR) is used mainly in the treatment of
1. Class I furcations
2. Class II furcations
3. Class III furcations
4. All of the above
Periodontics
Answer: 2
Guided tissue regeneration (GTR) is used mainly in the treatment of Class II furcations.
Bone graft procedures are most successful in treating
1) Furcation involvements
2) Deep, two-wall craters
3) Narrow three-wall defects
4) None of the above
Periodontics
Answer: 3
Bone graft procedures are most successful in treating narrow three-wall defects. These are defects that extend from the crest of the alveolar bone to the alveolar crest and involve only one surface of the tooth root. The success of a bone graft in such cases is due to the presence of three walls of intact bone that can provide stability and support for the graft material, allowing for predictable and effective regeneration of the missing bone tissue.
A young adult shows non-fluctuant, tender and red swelling in the marginal gingival lesion. This is most likely
1. Periodontal abscess
2. Periapical abscess
3. Gingival abscess
4. Periapical sinus
Periodontics
Answer: 3
A young adult with non-fluctuant, tender, and red swelling in the marginal gingival lesion is most likely to have a gingival abscess.
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.