Disuse Atrophy of Periodontium | Best MDS Coaching AIPGDEE preparations B-IDS

Disuse Atrophy of Periodontium leads to all except?
A.Rearrangement of periodontal fibers
B.Thinning of periodontal ligament width
C.Alveolar bone become porous
D.Recession of gingiva

Ans. (D)

The fact that periodontal ligament is thinnest in the middle region of the root seems to indicate that the fulcrum of physiologic movement is in this region The thickness of the periodontal ligament seems to be maintained by the functional movement of tooth. It is thin in function less and embedded teeth and Wide in teeth that are under excessive occlusal stresses. 

The adaptation of bone to function is quantitative as well as qualitative. Whereas increase in functional forces leads to formation of new bone, decrease function leads to decrease in the volume of bone. This can be observed in the supporting bone of teeth that have lost their antagonists.