This document discusses and compares several different systems for classifying dental caries lesions. It outlines 8 classification systems: Black's Classification System, WHO system, ICDAS, Mount-Hume Classification System, Finn's modification of Black's system for primary teeth, Baume's classification, Sturdevant's classification, and a system based on surfaces to be restored. Each system categorizes caries lesions differently based on factors like location, severity, and tooth surfaces involved.

2. a new paradigm among dental practitioners,
shifting from a restorative to
preventive/health promotion model.”

3. Caries classification systems:

4. 1) Black’s Classification System

5. 2) World Health Organization (WHO)
system
In this classification the shape and depth of the
caries lesion scored on a four point scale
• D1: clinically detectable enamel lesions with
intact surfaces
• D2: clinically detectable cavities limited to
enamel
• D3: clinically detectable cavities in dentine
• D4: lesions extending into the pulp

6. 3) International Caries Detection and
Assessment System (ICDAS)
The ICDAS detection codes range from 1 to 6
depending on the severity of the caries lesion.

7. 4) Mount-Hume Classification System
(SiSta)
 Site 1: pits, fissures
 Site 2: proximal surfaces
 Site 3: the cervical one third of the tooth
 Size 0: the earliest lesion that can be identified as the initial stages of
demineralization
 Size 1: minimal surface cavitation with involvement of dentine just beyond
treatment by remineralization alone.
 Size 2: moderate involvement of dentine. The remaining tooth is sufficiently
strong to support the restoration,
 Size 3: the lesion is enlarged beyond moderate. Remaining tooth structure
is weakened to the extent that cusps or incisal edges are split, or are likely
to fail if left exposed to occlusal load
 Size 4: extensive caries or bulk loss of tooth structure e.g. loss of a complete
cusp or incisal edge, has already occurred.

8. 4) Mount-Hume Classification System
(SiSta) …. Conti….

10. 5) Finn's modification of Black's cavity
preparation for primary teeth
• Class 1: cavity involving the pits and fissures
• Class 2: cavities involving proximal suface of molar
teeth with access established from the oclusal
surface.
• Class 3: cavities involving poximal surfaces of
anterior teeth which may or may not involve a labial
or lingual extension.
• Class 4: a restoration of the proximal surface of an
anterior tooth which involves the restoration of an
incisal angle.
• Class 5: cavities present on the cervical third of all
teeth.

11. 6) Baume's classification 
• a. pit and fissure cavities
• b. smooth surface cavities

12. 7) Sturdevant's classification
• Simple cavity: involving only one tooth
surface
• Compound cavity: involving 2 surfaces of a
tooth
• Complex cavity: involving more than 2
surfaces of a tooth

13. 8) Based on surfaces to be restored:
Most widespread clinical utilization
• O: for occlusal surfaces
• M: for mesial surfaces
• D: for distal surfaces
• F: for facial surfaces
• B: for buccal surfaces
• L: for lingual surfaces