MDS PREP
The finger rest established on tooth surfaces on the opposite side of the same arch is known as
1. Conventional finger rest
2. Opposite arch finger rest
3. Cross-arch finger rest
4. Finger-on-finger rest
The finger rest established on tooth surfaces on the opposite side of the same arch is known as cross-arch finger rest.
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.
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.
Which of the following gives historical record of past periodontal activity and is useful in monitoring success of periodontal therapy
1) Presence of bleeding
2) Probing depth
3) Clinical attachment
4) Recessive of gingiva
Periodontics
Answer: 2
Probing depth measurements provide historical data on periodontal attachment
levels, reflecting the past and present condition of periodontal health.
Tracking changes in probing depth is critical for assessing treatment success
and disease progression
Cervical abrasion is usually the result of
1. acidic fluids
2. sulcular brushing
3. gingival sulcular fluids
4. horizontal brushing
Periodontics
Answer: 4
Cervical abrasion is often caused by improper brushing techniques, particularly
horizontal brushing, which can wear away the enamel and dentin at the cervical
area of the teeth.
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.
Histologic examination of desquamative gingivitis shows
1. Hyperkeratosis
2. Loss of retepegs
3. Loss of basement membrane
4. All of the above
Histologic examination of desquamative gingivitis shows loss of basement membrane.
Which of the following is a problem relating to the improper use of a laterally positioned flap employed to cover a dehiscence?
1. Extreme patient discomfort
2. Presence of undetected occlusal trauma
3. Creation of a new dehiscence at the donor site
4. Severe infection
Periodontics
Answer: 3
If a laterally positioned flap is not properly designed or secured, it can lead
to complications such as tearing or failing to fully cover the dehiscence,
potentially causing a new dehiscence at the donor site.