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-1st sign of tooth formation
-stratified squamous epithelium thickens into underlying connective tissue
-extends off dental lamina for perm tooth development
-Goes through bud, cap, bell stage
-perminant teeth that follow primary teeth
-for secondary teeth
-found mesial to Max. primary canines
-found distal to mand. canines
-ALL primates have this space
-the difference between the space that deciduous(primary) molars
-larger in size
-take up a lot of space so when perminent replacements, which are smaller, have pleny of room when they erupt
molars continuing to move mesially (forward) after eruption
Has 2 effects:
-spaces b/w primary teeth are closed as the perm. 1st molars push primary molard together
-if primary teeth lost early or interproximal decay is present and is not restored, the perm. molar will move mesially and fill that space
Characteristics of Primary teeth
-Constricted occlusal table
-Short root trunks
-Roots flare apically
-Large pulp chambers
-Enamel thin and consistent depth
-the mand. molars are more mesial than max. molars
-Angles class III
-majority of children
Eruption dates primary teeth
Mand 1st molar-> 6-7yrs (Nonsuccedaneous)
Max. 1st molar-> (Nonsuccedaneous)
Mand central-> 7-8yrs
Mand lateral 8-9yrs
Mand canine-> 9-10yrs
Mand 1st premolar-> 10-12yrs
Max 1st premolar
Max 2nd premolar
Mand 2nd premolar
Mand 2nd molar-> 12-13yrs (Nonsuccedaneous)
Max 2nd molar-> (Nonsuccedaneous)
Mand 3rd molar-> 17-22yrs-> (Nonsuccedaneous)
Max 3rd molar-> (Nonsuccedaneous)
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