In radiographic terms, the pattern of alveolar bone loss with respect to quantity is described as:

• A. Horizontal or vertical
• B. Localized only
• C. Generalized or localized
• D. Progressive only

Answer: (C)

Describing how much bone loss is present across the mouth is about the extent or spread of the loss. In radiographs, the quantity is captured by labeling the involvement as generalized or localized: generalized means most or all of the dentition is affected, while localized means only a few teeth or a limited area are involved. This helps clinicians gauge the overall burden and plan accordingly.

Horizontal or vertical describes the pattern of bone loss around individual teeth (the topography or shape of the loss), not how widespread it is. Progressive refers to the rate or progression over time, not the amount of bone loss at a single time point. So the terms that best describe quantity are generalized or localized.