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NEET MDS Quiz - Practice Test
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Practice Test

Orthodontics - 3 Questions

1
Orthodontics
Jasper jumper is a
1) Flexible fixed functional appliance
2) Rigid fixed functional appliance
3) Fixed functional appliance
4) None of the above

📝 Explanation:

Jasper jumper is a flexible fixed functional appliance used for Class II correction, consisting of a flexible wire that allows mandibular advancement.

2
Orthodontics

Relapse of orthodontic tooth rotation is due to periodontal traction.  This is mainly caused by action of which periodontal fibers

1) Supracrestal fibres and oblique fibres 
2) Supracrestal fibres and horizontal fibres 
3)  Supracrestal fibres and transeptal fibres
4) Transeptal fibres and oblique fibres 

📝 Explanation:

PDL traction is mainly due to supracrestal fibres, transeptal fibres of gingival fibers.  

It needs at least 232 days for readaptation, e.g. rotations.  

To avoid relapse either circumferential supracrestal fibrotomy is done OR a prolonged retention is given.

3
Orthodontics
Prolonged thumbsucking directly results in all of the following except
1) Deep over bite
2) Proclincation upper central incisors
3) Rotation of upper laterals
4) Construction of maxills

📝 Explanation:

Prolonged thumbsucking typically causes an anterior open bite, not a deep overbite.

It commonly leads to proclination (forward tilting) of the upper central incisors.

It can cause rotation of the upper lateral incisors.

It often results in the construction (narrowing) of the maxilla (upper jaw).

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