Periodontal Osseous Defects

Periodontal Osseous Defects

Write short note on types of osseous defects.
Answer. Osseous defects are those defects which are formed as a result of destruction of alveolar bone due to periodontal disease.

Various Types of Osseous Defects

According to Goldman and Cohen (1958)

• One-walled defect
• Two-walled defect
• Three-walled defect
• Combined defect

According to Glickman (1964)

• Osseous/interdental craters
• Hemiseptal defects
• Infrabony defects
• Bulbous bone contour
• Inconsistent margins and ledges (plateau-like bony margins)
• Reversed architecture

According to Prichard (1967)

• Interproximal crater
• Inconsistent margins
• Hemisepta
• Furcation invasion
• Intrabony defects
• Combination

According to Manson and Nicholson

• Thickened margins
• Interdental crater
• Hemiseptum
• Infrabony defect with 3 osseous walls
• Infrabony defect with 2 osseous walls
• Infrabony defect with one osseous wall other than hemiseptum
• Marginal gutter
• Furcation involvement
• Irregular bony margins
• Dehiscence
• Fenestration
• Exostosis