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1 Orthodontics

Transitional phase of dentition is
1) During eruption of permanent and exfoliation of deciduous teeth
2) After all permanent teeth have erupted
3) Phase during correction of malocclusion
4) None of the above

Option 1

The transitional phase of dentition refers to the period when the primary (deciduous) teeth are being replaced by permanent teeth. This phase is characterized by the simultaneous eruption of permanent teeth and the exfoliation (loss) of primary teeth. It typically occurs between the ages of 6 and 12 years. The other options do not accurately describe this transitional phase; option 2 refers to a post-transitional phase, while option 3 pertains to orthodontic treatment rather than a specific phase of dentition.

Option 2

Option 3

Option 4

2 Orthodontics

If the edgewise bracket is not pressed completely on to a tooth on the mesial side while bonding, the side effect would be
1. intrusion
2. extrusion
3. rotation
4. breakage of bracket

Option 1

Option 2

Option 3

we are applying force distally only..force vector will rotate the tooth distally

Option 4

3 Orthodontics

The philtrum of the upper lip is formed largely by the
1) Lateral nasal processes
2) Globular process
3) Maxillary processes
4) Mandibular processes

Option 1

Option 2

Explanation: The philtrum is the vertical groove located in the middle of the upper lip. It is primarily formed by the fusion of the medial nasal processes, which include the globular process. The globular process is a key structure in the embryonic development of the face, contributing to the formation of the upper lip and the philtrum.

Option 3

Option 4

4 Orthodontics

The orthodontic correction of which of the following is most easily retained

1) Anterior cross bite
2) Crowding
3) Diastema
4) Spacing

Option 1

SOLUTION

The key to success is to use an appliance that is both comfortable, easily retained and predictable such as a simple Hawley retainer with recurve springs or a fixed labial-lingual appliance (including a vertical removable arch for ease of adjustment with a recurve spring to jump the cross-bite).

Both of these appliances work by tipping the maxillary teeth forward so they are in a normal dental relationship to the mandibular teeth. Once this is accomplished, it will allow future coordinated growth between the maxilla and the mandible

Option 2

Option 3

Option 4

5 Orthodontics

According to Angle, the key to normal occlusion in adults is the anteroposterior relationship. His description of teeth relationships in normal occlusion remains a fundamental observation. Angles observations are based on which teeth that are most reliable to understand occlusion

1) First molars and canines
2) First molars and first Premolars
3) Canines and first Premolars
4) First molars and central incisors

Option 1

SOLUTION

The mesial incline of the upper canine occludes with the distal incline of the lower [canine];

the distal incline of the upper canine occludes with the mesial incline of the buccal cusp of the lower first premolar.

Option 2

Option 3

Option 4

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