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    All About Permanent TeethByNaghman Zuberion Friday, April 13, 2012 at 10:48am

    Maxillary Central Incisor (#8 And #9)

    Lobes:

    4 lobes

    3 a!ial

    mesial: mesial marginal ridge and mesial part o labial sura!e

    distal: distal marginal ridge and distal part o the labial sura!e

    labial: labial ridge "not #ery prominent$

    1 lingual

    lingual: !ingulum

    Chronoloy:

    %ruption o de!iduous: 10 months

    %ruption o permanent: &'8 years

    (al!i)!ation initiation: 3'4 months

    Inter!roximal contacts: (And heihts o" contour)

    mesial: in!isal 1*3

    distal: +un!tion o in!isal 1*3 and middle 1*3

    All !onta!ts are !entered a!iolingually

    eihts o" contour:

    Bu!!al * labial * a!ial: +un!tion o in!isal 1*3 and middle 1*3 "one sour!e !laims

    (er#i!al 3rd$

    lingual: !er#i!al 1*3

    $mbrasures:

    %mbrasures bet-een the t-o .a/ !entral in!isors is smaller than bet-een .a/

    !entral and laterals

    %oot:

    ingle root single pulp !anal root is longer than !ro-n .ost liely tooth to

    ha#e 1 root !anal

    Fa!ial #ie-: pulp !hamber -ith 3 pulp horns !one'shaped -ith blunt ape/

    pointing slightly distal

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    5ingual #ie-: !one'shaped, tapers distally slightly

    (ross'se!tional #ie-: "triangular$ mesial aspe!t longer

    6ulp !a#ity is 7attened mesiodistally

    &acial ' labial ' buccal:

    utline is trape9oidal

    5abial sura!e is smooth and !on#e/ in the !er#i!al 3rd

    anatomi!al !ro-n is longer than -ide "also -ider at in!isal edge$

    mesial outline is relati#ely straight or only slightly !on#e/

    distal outline is more !on#e/ than mesial outline

    in!isal outline is straight

    mamelons present on ne-ly erupted teeth "rounded terminations o 3 labial

    lobes$

    mesioin!isal angle is a right angle istoin!isal angle is more rounded

    (%; !ur#ed !on#e/ to-ard ape/

    light de#elopmental depressions and ridges "distolabial and mesiolabial

    depressions$

    Linual:

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    n!isal edge bise!ts the a!iolingual diameter on line -ith root !enter

    >n!isal sura!e slopes to-ard the lingual

    6oint o !on#e/ity is at !ingulum ? distal to it@s !enter

    mesial and distal !onta!t points !entered labiolingually

    mesioa!ial and distoa!ial line angles are more prominent than .5 and 5 line

    angles

    F is more rounded than .F

    e#elopmental depressions and ridges seen on labial sura!e

    .esial and distal marginal ridges are present

    Maxillary Lateral Incisor (# And #*+)

    Chronoloy:

    eruption o de!iduous: 11 months

    eruption o permanent: 8' years

    !al!i)!ation initiation: 10'12 months

    Inter!roximal contacts:

    .esial'distal !onta!t points

    mesial: +un!tion o in!isal and middle 1*3

    distal: middle 1*3

    "Both are !entered a!io'lingually$

    eihts o" contour:

    a!ial: !er#i!al 1*3

    lingual: !er#i!al 1*3

    %oot:

    single "similar to ma/ !entral in!isor$ 1 pulp !anal 1 !hamber pointed to-ard

    distal 2 pulp horns

    'root is as long or longer than the ma/ !entral in!isor and (%; is

    !on#e/ to-ard ape/

    !ross'se!tion o root: o#oid shape

    oot is !one shaped and tapers api!ally ? root tip pointed and eCually as long as

    !entral

    $mbrasures:The incisal e"rasure "et#een Ma$ lat and canine is the

    largest incisal e"rasure

    ,eneral:

    %aries in for ore than any other tooth &e$ception 'rd olars(

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    )e$* peg+shaped laterals, dens in dente, t#isted roots, etc-

    Most fre.uently congenitally a"sent anterior tooth

    imilar to ma/ !entral in!isor e/!ept smaller in dimensions, "e/!ept root length$,

    .ore rounded, more pronoun!ed mesial = distal marginal ridges, lingual ossa is

    deeper

    "ne te/t states this tooth has the largest lingual fossa)

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    utline is triangular

    appears -ider than the mesial #ie-

    istal aspe!t !ur#es more lingually than the mesial to !onorm to o!!lusal ar!h

    shape

    !er#i!al line !ur#ature is less than mesial "G 1mm less$

    A de#elopmental groo#e may be present on the distal o !ro-n e/tending do-n

    root

    Incisal:

    utline is o#oid

    (ontour is more !on#e/ be!ause !ingulum is so mu!h bigger

    (rest o the !ingulum is slightly distal to the !enter o the tooth

    5 line angle is more rounded than .5 angle

    Both o these line angles more rounded than the ma/ !entral in!isor

    .esial and distal !onta!t areas are !entered labiolingually

    >n!isal sura!e*edge is angled lingually

    Mandibular Central Incisor (#-. And #-/)

    Chronoloy:

    eruption o de!iduous: 8 months

    eruption o permanent: H'& years

    !al!i)!ation initiation: 3'4 months

    Inter!roximal Contacts:

    mesial'distal !onta!t points are at same le#els

    mesial: in!isal 1*3

    distal: in!isal 1*3

    eihts o" contour:

    bu!!al: !er#i!al 1*3

    lingual: !er#i!al 1*3

    %oot:

    ingle "#ery narro- mesiodistally$ !ur#es distally in some !ases "o#oid or round$

    oot is longer than !ro-n length

    Isually 1 pulp !anal "may ha#e 2 ' !alled Fa!ial and 5ingual pulp

    !anals$

    Broader F5 "than .$

    oot may ha#e broad de#elopmental depression along its length "deeper on

    distal than on mesial$

    oot tapers api!ally near the middle 3rd

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    ,eneral:

    /nly syetrical tooth in outh

    1st su!!edaneous 2th to erupt

    Sallest adult tooth Sallest M0 diension of any cro#n1

    ets in +a- -ith root api!es a!ial and !ro-ns lingual

    Jider F5 than .

    Labial:

    utline is trape9oidal

    in!isal outline is straight "mamelons present -hen )rst erupt$

    !ro-n appro/imately t-i!e as long as -ide

    mesial and distal outlines are straight to the !onta!t point and then taper

    "narro-$ to !er#i/

    mesioin!isal and distoin!isal line angles are sharp "0K$

    no de#elopmental depressions

    labial sura!e is 7at in in!isal 1*3 and be!omes more !on#e/ !er#i!ally

    Linual:

    utline is trape9oidal

    lightly !on!a#e in!isally but no distinct lingual fossa

    .esial and distal marginal ridges are only minor ele#ations

    (ingulum is mu!h less distin!t than in the ma/illary in!isors

    no de#elopmental groo#es

    Mesial:

    utline is triangular

    5abial outline is !on#e/, height o !ontour is !er#i!al 3rd

    Incisal edge lies lingual to line "isecting the root

    .esial (%; !ur#es in!isally about 1 mm more than on the distal

    Broader labiolingually than mesiodistally

    Upon wearing of the tooth, the incisal edge will angle to the facial.

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    Incisal:

    utline is o#oid

    symmetry o tooth is ob#ious "mesial M and distal 12 are almost identi!al$

    in!isal edge is at right angles to a line bise!ting the !ro-n labiolingually "in!isal

    edge lies lingual to !enter o tooth$

    tooth !on#erges lingually ? the . -idth o a!ial bigger than . -idth o lingual

    !onta!t areas !entered F5'ly

    Mandibular Lateral Incisor (#-0 And #-1)

    Chronoloy:

    eruption o de!iduous: 13 months

    eruption o permanent: &'8 years

    !al!i)!ation initiation: 3'4 months

    Inter!roximal contact !oints:

    mesial: in!isal 1*3

    distal: in!isal 1*3 "more !er#i!al$

    eihts o" contour:

    bu!!al: !er#i!al 1*3

    lingual: !er#i!al 1*3

    %oot:

    "o#oid or round$ 1 pulp !anal

    similar to mand !entral in!isor but slightly larger

    depression on the distal is deeper than on the mand !entral in!isor

    ,eneral:

    Larger than central incisor"-ider !ro-n . than the !entral in!isor$

    ll extra width appears to !e added to the distal aspect of

    the tooth

    5ong a/es are positioned -ith root api!es a!ially and !ro-ns lingually

    5arger than the mandibular !entral in!isor

    .ost liely "along -ith mand !entral$ o all in!isors to ha#e both mesial

    and distal !on!a#ities

    Labial:

    incisal edge slopes do#n#ard distally

    distal !ro-n height is oten shorter than the mesial !ro-n height

    .esioin!isal angle is sharp "0K$

    istoin!isal angle is rounded

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    Linual:

    5ingual aspe!ts mat!h the lingual sura!e o the mandibular !entral

    in!isor

    Mesial and istal:

    utline is triangular

    .esial and distal aspe!ts are Cuite similar

    istal de#elopmental depression on the root is more mared than on the mesial

    >n!isal edge is lingual to a line bise!ting the root

    in!isal edge slopes labially

    more o a!ial sura!e o tooth is #isible rom the distal due to lingual t#ist of

    the distal part of the cro#n

    rom the mesial, the distoin!isal tip is #isible

    Incisal:

    in!isal edge lingual to the !enter o the tooth

    tooth is not symmetri!al: distal part o the !ro-n appears to be !ur#ed lingually

    as i the distal part is t-isted on the root

    F line angle is positioned more lingual

    Maxillary Canine (#1 And #**)

    Chronoloy:

    eruption o de!iduous: 1 months

    eru