According to Atwood residual ridge classiﬁcation order V denotes:: (A) High well-rounded ridge, (B) Low well-rounded ridge, (C) Knife-edge ridge, (D) Depressed ridge
Answer is B. Order I – Pre-extraction-alveolus bearing tooth
Order II – Post-extraction-alveolus after extraction
Order III – High, well rounded-high alveolar process
Order IV – Knife-edge-High, narrow alveolar process
Order V – Low, well-rounded-rounded flat alveolar process
Order VI – Depressed-concave flat alveolar process.