| S I X S T A G E S |
| Birth to the
complete primary dentition |
| First
intertransitional period |
| First
transitional period |
| Second
intertransitional period |
| Second
transitional period |
| Adult
dentition |
|
|
|
| Orderly Sequence |
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 |
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| R I C H A R D Y O O N |
| 2 |