primary dentition

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Primary Dentition. Dental Formulas. Shorthand summary of teeth present Maxillary quadrant/mandibular quadrant Multiply by 2 for entire dentition. Examples of Dental Formulas. Human permanent dentition I 2/2C 1/1P 2/2M 3/3 Human primary dentition I 2/2C 1/1M 2/2 Cats - PowerPoint PPT Presentation

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  • Shorthand summary of teeth presentMaxillary quadrant/mandibular quadrantMultiply by 2 for entire dentition

  • Human permanent dentition I 2/2C 1/1P 2/2M 3/3

    Human primary dentitionI 2/2C 1/1M 2/2

    CatsI 3/3C 1/1P 3/2M 1/1

    DogsI 3/3C 1/1P 4/4M 2/3

  • Universal system: A to TPalmer: A to E by quadrantFDI: 1st number 5 8, second 1 to 5

  • Primary dentition period: only primary teeth are present, 6 months to 6 yearsMixed dentition period: the primary teeth are being replaced by the permanent teeth, 6 to 12 yearsPermanent dentition period: after the last primary tooth has exfoliated

  • Primary

    Mixed

    Permanent

  • Mastication of solid foodsSpeech developmentEsthetics and self-esteemSpace for eruption of permanent teethHealth of the permanent teeth

  • 1st molars are first permanent teeth to erupt.Referred to as 6 year molarsThey erupt distal to primary dentition.

  • In general, mandibular teeth erupt before maxillary counterpart.

    1st molars are first permanent teeth to erupt.

    Central incisors are first SUCCEDANEOUS teeth to erupt.

    Note the late eruption of the maxillary canine: may be impacted due to space loss.

    Succedaneous teeth are permanent teeth that replace primary teeth. AB D C E

    A B D CE

  • Size: smaller in all dimensions.Color: lighter in color.Crowns: bulbous, wider mesiodistally, shorter incisocervicallyCEJ: appears constrictedRoots: longer and more slender

  • Primary teeth have:thinner enamel & dentinrelatively largerpulp cavitiesPulp horns are closer to outer surfaceGreat variation in size & locationForm of pulp follows external anatomyUsually a pulp horn under each cusp**Mesial pulp horn is higher

  • Short, bulbous crownsSlender, flared rootsShort root trunkSecond molars >first molars

  • GROUP 6:Celso, Anne R.Flores, Joyce Anne G.Jung, Young MinParmar, AsmaRamirez, Jan Andre P.

  • 3 roots1st resembles a maxillary premolar2nd resembles a permanent maxillary 1st molar

  • Mesial half of the crown has a greater heightDBR,MBR, and palatal rootSlender and long Spread widely

  • Distal root is shorter than Mesial root

    Lingual root is positioned midway bet. the Bu roots

  • Bifurcation of the roots begins almost immediately at the Cervical line

    Little root trunk

  • Almost similar to buccal aspectMLC is prominentDLC is poorly definedDBC visible

  • All roots visibleLi root is larger MDLi surface is entirely made up one cuspSlightly convex occlusocervically, but markedly convex MD

  • MB, DB line angle are greater than ML,DL line angleMesial line angles are greater than Distal line anglesCrown converges lingually and distallyOcclusal surface is nearly rectangularHas a center fossa and pit

  • Has BG and LGHas a Mesial Triangular FossaMesial pitNo distal pitSupplementary groove in the mesial pit

  • Cervical width is much greater than occlusal due to a very promi- nent cervical ridgeBuccal outline is straight or slightly concave

  • Lingual outline is convexML cusp is longer and sharper than MB cuspCervical line is slightly curved toward occlusal

  • Marginal ride is shorter and less prominent

  • Smaller than mesial aspectMR is less prominentDb cusp is longer and sharper than DL cusp

  • Cervical line straight and slightly curved occlusallyCervical ridge is not so prominent

  • Primary Maxillary Left First Molar

  • Tooth 54

  • MAXILLARY MOLARS

    MAX 1st MolarMAX 2nd MolarBUCCAL-little evidence of devt grooves-looks like a PREMOLAR-roots are slender,long, spread widelyDistal root shorter-MBC DBC well defined, equal in size-roots are slender and longer than MAX 1st molar

    Lingual-MLC most prominent- MLC, DLC sometimes 5th cusp is seen.

    Proximal-DBC long and sharp-DLC poorly developed-typical molar outlineOcclusal-Nearly RECTANGULAR-RHOMBOIDAL

  • 2 roots2nd resembles the mandibular 1st permanent molar1st does not resemble any other permanent or primary tooth!

  • Tooth 84

  • MANDIBULAR MOLARS

    MAND 1ST MolarMAND 2ND MolarBuccal2 Buccal cusps are distinct but looks like a fusion of two teeth-similar to permanent 1st Molar-3 cusp portion almost equal in size

    Lingual-MMR well devd might be mistaken for another cusp- Li cusps equal in dimension

    Proximal-curvature of cervical line is distinct-flat and evenly taperedOcclusal-Rhomboidal-Rectangular

  • Primary teeth haveThinner enamel and dentin layersPulp horns closer to the outer surfaceMesial pulp horn much higherRelatively large pulpsEnamel rods directed slightly occlusal in cervical areaMore tortuous and irregular pulp canals

  • Overview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary DentitionOverview of the Primary Dentition