Vertical bone loss is characterized by which description?

• A. Even/uniform apical migration of alveolar crest
• B. The anatomical area of a multi-rooted tooth where the roots divide
• C. Angular bone loss along the root that more severely involves the affected tooth/teeth than the adjacent tooth
• D. Conical tooth on xray

Answer: (C)

Vertical bone loss shows up as an angular, infrabony defect along the tooth root. The bone recedes more on one side, creating a wedge-shaped pattern where the remaining bone forms an angle with the tooth surface. This is different from horizontal bone loss, which progresses evenly around the tooth so the crest sinks uniformly. In clinical terms, you often see a deeper pocket on one aspect and a more pronounced radiographic angle at the bone crest. The other descriptions don’t capture this localized, angular pattern: one describes uniform crest recession, another points to a feature of the tooth anatomy (where roots divide), and another is about a radiographic shape of the tooth itself rather than the bone loss pattern.