MDS PREP
According to Melcher concept, the regeneration of new attachment is from
1. Periodontal ligament
2. Gingival connective tissue
3. Alveolar bone
4. Junctional epithelium
Periodontics
Answer: 1
According to Melcher's concept, the regeneration of new attachment is from the periodontal ligament.
Which of the following structures is most likely to be damaged when per forming flap surgery on the complete mandibular arch?
1. Mental nerve
2. Attachment of mylohyoid muscle
3. Retromolar pad
4. Attachment of buccinator muscle
Periodontics
Answer: 1
The mental nerve is situated beneath the mandibular arch and is at risk during
flap procedures, especially when flaps are elevated or repositioned in that
area.
Which of the following roots are most likely to have flutings in their mesial surfaces which will make thorough root planning difficult?
1. Maxillary central incisor
2. Mandibular second premolar
3. Maxillary first premolar
4. Mandibular canine
Periodontics Answer: 3
The maxillary first premolar often has developmental grooves and flutings on the
mesial surface that can complicate thorough root planing and make it more
challenging to fully debride the root surface.
Which of the following groups of fibers belongs to the gingivodental group and not to the periodontal ligament?
1. Circular
2. Alveolar crest
3. Transseptal
4. Horizontal
Periodontics
Answer: 1
The circular fibers are part of the gingivodental group and are located in the
marginal gingiva, encircling the teeth. In contrast, the alveolar crest,
transseptal, and horizontal fibers are part of the periodontal ligament.
Following the application of disclosing solution on teeth, a patient can remove plaque most effectively by using
1. dental floss
2. a strong mouthwash
3. a water irrigating device
4. a soft bristle brush
Periodontics
Answer: 4
A soft bristle brush is the most effective tool for removing plaque after the application of a disclosing solution. It allows for thorough cleaning of the tooth surfaces, including areas that may be difficult to reach with other methods.
"Tuberous sclerosis" is seen in
1. Vascular fibroma
2. Leprosy
3. Tuberculosis
4. Bone disorders
Tuberous sclerosis is associated with vascular fibroma.
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.
Ideal thickness of graft should be
1. 1.0 to 1.5 mm
2. 0.25 to 0.5 mm
3. 0.5 to 1 mm
4. 2-3 mm
Periodontics
Answer: 1
The ideal thickness for a graft is typically between 1.0 to 1.5 mm to ensure adequate healing and integration.