Linea externa

Normal periodontium

Projection of periodontium

Generalized prepubertal periodontitis

Juvenile periodontitis

Advanced adult periodontitis

Horisontal bone loss

Suprabony and infrabony pockets

Infrabony defects

Evaluation of bone height

Cortical level

L

B

Depth measurement

One-wall hemiseptum defect

One-wall defect

Two-wall defect

Osseous crater

Osseous crater

Three-wall infrabony defect

Three-wall bony pocket

Four-wall/circular pocket

projections

Bite-wing film

Early signs of periodontitis

Crestal irreguilarities

Furcation involvement

Furcation involvement

Spurlike, veener type calculus

Attrition caused loose contact

Food packing area

Pocket with root resorption