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NEET MDS Quiz - Practice Test

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Orthodontics - 3 Questions

1
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.

2
Orthodontics
Crowding that occurs after age of 18 is the result of
1) Impacted third molar
2) Physiological maturational change
3) Orthodontic relapse
4) Periodontal disease

📝 Explanation:

Crowding that occurs after age 18 is typically the result of physiological maturational changes.
Explanation: Dental crowding is a common malocclusion where teeth do not have enough space to align properly in the dental arch. After the age of 18, most of the facial growth has concluded, and the teeth are fully erupted. If crowding occurs at this stage, it is most likely due to physiological maturational changes, such as the natural movement of teeth or the eruption of third molars (wisdom teeth). Impacted third molars are another potential cause of late crowding, but the question specifies that the crowding is not due to them. Orthodontic relapse is a possibility if the individual had prior orthodontic treatment, but without that context, the most likely cause for new crowding in adulthood is the natural shifting of teeth over time or the late eruption of wisdom teeth. Periodontal disease can affect tooth positioning, but it does not directly cause crowding.

3
Orthodontics

Bone tissue grows by

1) Apposition 
2) Interstitial growth
3) Osteoclastic growth
4) Mesenchymal tissue growth

📝 Explanation:

SOLUTION

Interstitial growth, simply means that it occurs at all points within the tissue. When mineralization takes place so that hard tissue is formed, interstitial growth becomes impossible.

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