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NEET MDS Quiz - Practice Test
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Practice Test

Orthodontics - 3 Questions

1
Orthodontics

Analysis which is similar to Pont’s analysis is_______?  

1) Linder Harth index
2) Korkhaus analysis
3) Bolton’s analysis
4) (A) and (B)

📝 Explanation:

SOLUTION
· Pont’s in 1905 presented a system whereby the measurement of the four maxillary incisors automatically established the width of the arch in the premolar and molar region.  If measured value is less than calculated value, it indicates the need for expansion. 

· Linder Harth index: This analysis is very similar to Pont’s analysis except that a new formula has been proposed to determine the calculated premolar and molar value. 

· Korkhaus analysis: This analysis is also very similar to Pont’s analysis it makes use of Linder Harth’s formula to determine the ideal arch width in the premolar and molar region.
 In addition this analysis utilizes a measurement made from the midpoint of the inter-premolar line to a point in between the two maxillary incisors. 
 
· Bolton’s analysis: The Bolton’s analysis helps in determining disproportion in size between maxillary and mandibular teeth. 

2
Orthodontics
The main aim of Frankel appliance is to influence
1) Function of tongue
2) Temperomandibular joint
3) Outer neuromuscular envelop
4) Control of vertical dimension

📝 Explanation:

The primary aim of the Frankel appliance is to influence the outer neuromuscular envelope, promoting proper muscle function and jaw positioning.

3
Orthodontics

Which of these is the ideal appliance for correction of posterior cross bite due to digit sucking habit?

1) Tongue spikes
2) Hay rakes
3) Maxillary lingual arch with palatal crib
4) Quad helix

📝 Explanation:

Classification of appliances for thumb-sucking

1. Removable appliances- These are passive appliances. These are retained in the oral cavity by means of clasps and they norm have one of these following additional components:
a. Tongue spikes
b. Tongue guard
c. Spurs/rake 

2 Fixed appliances 

a. Quad helix
b. Hay rakes
c. Maxillary lingual arch with palatal crib 

The ideal appliance to correct posterior cross-bite caused due to digit sucking is Quad Helix. It is a lingual arch which is adjustab and needs very little patient cooperation because it is fixed and is reliable and easy to use.

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