300 Dental anatomy facts I HAVENT CHANGED THE MATTER , I HAVE JUST ADDED THE PICS S THAT ITS EAS! T "EARN P#$ma#y %ent$t$on
1. Prima rimary ry teet teeth h a#e less m$ne#al$&e% than permanent teeth and consequently are more easily worn 2. The %$ffe#ence $n s'ace f#om t(e '#$ma#y to the permanent dentition is )*+mm. 3. Mamelons t(at #ema$n eyon% t(e a-e of .0 – generally indicate an open bite 4. Calcificatio Calcification n of the primary primary roots roots is normally normally complet completed ed at 34 years of of age. !. "sual pattern pattern of eruption eruption for primary primary teeth teeth is centrals centrals## laterals# laterals# 1st molars# canines# 2nd molars. $. Primate Primate space space ma%illary& ma%illary& btn lateral lateral incisor incisor and canine canine '. (andib (andibula ular& r& btn btn canin canine e and and first first molar molar.. ). P#$ma#y s'ac$n- fo# t(e ante#$o# teet( – (ost frequently ca/se% y growth of the dental arches *. D$#ect$on of '#$ma#y enamel #o%s in the cer+ical third is in an occlusal direction. 1,. Primary molars differ from the permanent molars in that their roots are more di+ergent. 11. Primary Primary molar lac-s an identifiable identifiable root trun-.
Primary Central incisor 12. Primary Primary mandibular mandibular central incisor incisor has the smallest *" c#o1n %$mens$on 13. Primary and permanent mandibular central incisor – most bilaterally symmetrical tooth 14. n delayed resorption of primary incisors the permanent incisors usually erupt lingually /0harteeth 1!. Primary central incisor e%hibits a prominent cer+ical ridge both on the facial and lingual surfaces.
Primary canine 1$. rom a facial +iew# the crown of a primary canine has a mesioincisal slope longer than the distoincisal. 1'. Cusp tip of the primary canine is generally offset offset to the distal
Primary (a%illary fist molar 1). Primar Primaryy (a% 1st molar has a crown that somewhat resembles a permanent premolar
1*. Primar Primaryy (a% 1st molar has roots that resemble a typical permaenent ma%illary molar 2,. The cer+ical ridge is most prominent for primary ma%illary teeth /ttention5 /ttention5 on the mesiofacial st surface of the 1 molar
Primary (a%illary 2nd molar 21. Primary Primary ma%illary ma%illary 2nd molar is the primary tooth that generally has an oblique ridge 22. Primar Primaryy ma% 2nd molar is the only primary posterior tooth to ha+e oblique and trans+erse ridges and distolingual groo+e 23. Primar Primaryy 2nd molar generally e%hibits the cusp of carabelli 24. 6ast primary primary teeth to erupt is the (a%illary (a%illary 2nd molars 2!. Primar Primaryy 2nd molar e%hibits more cusps than the primary 1 st molar
Primary (andibular 1st molar 2$. Primary tooth that has the most distinctly prominent facial cer+ical ridge is (andibular 1st molar 2'. acial acial +iew of a primary mandibular mandibular 1st molar the C78 is most apically positioned on the mesial 193rd 2). Primary Primary mandibular mandibular 1st molar usually e%hibits a distal triangular fossa /Central fossa usually displaced to the distal. 0ome sources call it a distal or a :main; fossa rather than a central 2*. Primary Primary mandibular mandibular 1st molar has the most distinct trans+erse ridge 3,. Primar Primaryy 1st mandibular molar does <=T loo- li-e any permanent tooth 31. Primary teeth that differ the most from permanent teeth are the mandibular 1st molars 32. >ighest and sharpest cusp cusp on a primary mandibular first molar is the (6# not (?5
Pe#manent %ent$t$on
Inc$so#s
(a%illary Central ncisor 33. The teeth whose function is primarily biting are incisors 34. (a%illary central has the greatest 6 a%ial inclination 3!. (a% central has the greatest cer+ical cur+ature /on mesial of any other tooth 3$. (a%illary incisors are the only ante#$o# teeth that are wider ( than 6 3'. (a% central incisor has greatest ( crown dimension of any
Ma2$lla#y "ate#al Inc$so#
43. (a%illary lateral has (=0T crown shape +ariations 44. 7%cept for 3rd (olars the ma%illary lateral incisor e%hibits the most de+iation in crown morphology 4!. (a%illary lateral incisor most often is in abnormal relation and contact with adAacent teeth 4$. =ther than 3rd molars the tooth that is most often congenitally missing is the ma%illary lateral incisor 4'. nterior tooth that most li-ely would demonstrate the lingual pit caries is ma%illary lateral incisor 4). The 6 groo+e of a (a% 6at incisor is an anatomical feature that complicates root planning. 4*. The distoincisal angle of ma%illary lateral has the greatest con+e%ity of all ma%illary anterior teeth. !,. (a% lat incisors generally ha+e the most prominent marginal ridges of all anterior teeth. !1. (a% lat incisors ha+e the most distinct and deepest lingual fossaBs of all anterior teeth. !2. (a% lateral incisorsB ( crown width is 0(6670T of any (66@D tooth !3. (a% lateral has ( measurement that is nearly identical to 6. /ttention5 Closest of all
!4. ( width of the ma% lat incisor is narrower than the ma% central incisor !!. (a% lateral has distal contact that furthest cer+ically of any
Man%$/la# cent#al $nc$so#s
!). (andibular centrals distinguished by the cer+ical cur+ature which is greater on the mesial than distal !*. The mandibular centrals and laterals most frequently ha+e conca+e areas on mesial and distal root surface $,. (andibular centrals – 0(6670T crown dimensions of
$!. (andibular central incisors ha+e contact points at the same incisocer+ical le+el $$. (andibular central incisors and (a%illary 3rd molars generally occlude with only one o''os$ntoot( $'. irst s/cce%aneo/s tooth to erupt in the mouth is the Permanent (andibular central incisors. /no permanent 1st molar not succedaneous $). ? and 6 embrasures may be same siEe /F6
Man%$/la# late#al $nc$so#s
$*. Crown of (andibular lateral incisors tilts distally in relation to long a%is /follows arch (@ can be seen from mesial ',. ( width of the (andibular lateral incisors is wider than the mandibular central incisor
Can$nes Ma2$lla#y can$nes
'1. (a%illary canine has G@7T70T cer+ical prominence of any
Man%$/la# can$ne
)2. (andibular canine has the straightest mesial alignment of crown to root )3. (esial surface of the crown of the (andibular canine is almost parallel to the long a%is. )4. (andibular canine has longest C@=I< dimesion of
)'. (andibular canine is the anterior tooth that (=0T @7J"7
/=pposite to ma%illary canine
P#emola#s
Ma2$lla#y .st '#emola#
*'. (a%illary 1st premolar has the most pronounced de+elopmental marginal groo+e of any ma%illary tooth. *). (a%illary 1st premolar has a mesial conca+ity that ma-es difficult to adapt a matri% band. **. Cer+ical cross section of (a%illary 1st premolar e%hibits a -idney shaped root outline. 1,,.The cer+ical cross section of the (a%illary 1 st premolar e%hibits a -idney shaped pulp chamber floor 1,1.
Ma2$lla#y )n% '#emola#
/Ihen in doubt between 1st and 2nd premolar choose 1st premolar 1,).0iEe and position of the cusps are more identical for the 2 nd ma%illary premolar than the first 1,*.(a%illary 2nd premolar has two cusps that are of equal height. 11,.(a%illary 2nd premolar – symmetrical P=0T7@=@ tooth /has to do with the cusps 111.nstead of a long central groo+e with few supplemental groo+es it has a short central groo+e with a lot of s/''lemental -#oo4es that ma-e it loo- 1#$n5ly 112.(a%illary 2nd premolar has fossa that are closest in siEe compared to any other posterior tooth.
Man%$/la# .st '#emola#
113. (andibular 1st premolar has a uniquely prominent triangular ridge /0na-e eyes5
12).(andibular 1st premolar – (ost +ariation of all posterior teeth in facial +s lingual cusp height. /ma% 1st premolar 1mm diff 12*. acial masticatory mucosa /attached gingi+a is <@@=I70T on the C6 aspect of mandibular premolars 13,. (andibular 1st premolar 6 smallest of any posterior tooth 131. (andibular 1st premolar is closest of all (<?"6@ T77T> in 6 +s ( diameter#
Man%$/la# )n% '#emola#
132. =cclusal outline of (andibular 2 nd premolar is Penta-onal /occlusal table rectangular 133. Premolar that is most li-ely to ha+e a crescentshaped central de+elopmental groo+e (andibular 2nd premolar 134. 0hortest interdental papilla – between man 2 nd pm and 1 st molar 13!. Dtype mandibular premolar has 1 facial and 2 lingual cusps.
13$. Dtype (andibular 2 nd premolar has the same no. of the occlusal pits as the ma%illary 1 st molar. 13'. (andibular 2nd premolar – =<6D premolar with multiple lingual cusps 13). (andibular 2nd premolar – =<6D premolar with a lingual groo+e 13*. (andibular 2nd premolar – =<6D premolar with central fossa 14,. The P( that most frequently has a single central pit is the mandibular second 141. (=0T congenitally (00
Mola#s Ma2$lla#y .st mola#
142. =cclusal outline form – rhomboidal 143. ( and 6 angles from the occlusal outline tend to be acute angles 144. (6 and angles from the occlusal outline tend to be obtuse angles. 14!. The (a%illary 1st molar tends to taper toward the facial rather than toward the lingual so the buccal embrasure is larger than lingual 14$.(ost prone facial and lingual surfaces of molars are the lingual of ma%illary and the facial of mandibular. 14'. 6argest root of (a%illary 1st molar is Palatal 14). 0mallest root of (a%illary 1st molar – distobuccal /(? root(?2 hence should be bigger 14*. rom facial +iew# ape% of lingual root is in line with the facial groo+e of the tooth 1!,. Hiew from 6# in line with the midpoint of ( diameter 1!1. Ihen 4th pulp canal present (? 1!2. =f 3 furcations of (a%illary 1 st molar mesial is closest to the cer+ical line 1!3. =f 3 furcation of (a%illary 1 st molar distal is the furthest from cer+ical line istance of furcations from cer+ical line (L?L
1!4. =blique ridge of (a%illary 1st molar forms the distal boundary of the central fossa 1!!. =btuse corners coincide with the direction of the oblique ridge./(l9df 1!$. Center of the oblique ridge on a ma%illary 1 st molar is at the same le+el with the marginal ridge. 1!'. =blique ridge connects the (6 and cusps. 1!). (6 cusp of (a%illary 1 st molar occludes the central fossa of the mandibular molars 1!*. (a%illary 1st molar has the greatest 6 diameter of crown of 66 teeth /thin- of cusp of carabelli 1$,. (a%illary 1st molar closest in siEe 6 +s ( of any (66@D P=0T7@=@ teeth
1$1. (a%illary 1st molar has wider ( width toward the facial than toward the lingual. 1$2. 6 cusp of ma%illary molar is the only one that is not part of the molar cusp triangle. 1$3. (6 cusp of the (a%illary 1 st molar is its largest and longest cusp. 1$4. Tooth most li-ely to be forced into ma% sinus (a%illary 1 st molar 1$!. (a%illary 1st molar has a distal conca+ity that can pose a special problems in matri% placement. 1$$. Crown of (a%illary 1st molar has a shorter 6 groo+e than the 2 nd (olar
Ma2$lla#y )n% mola#
1$'. 6 cusp is only one that is not a part of the molar cusp triangle 1$). f 6 cusp is not preset M 3 cusp type heart shaped. 1$*. @oots of the (a%illary 2nd molar tend to be less di+ergent and ha+e greater distal inclinations. 1',. Cross sectional outline at the cer+ical is roughly triangular for the ma%illary 2 nd molar
Man%$/la# .st mola#
1'1. Groo+e pattern for the mandibular 1st molar is considered a D or ryopethicus pattern. 1'2. =cclusal outline of (andibular 1 st molar – Pentagon 1'3. 0mallest cusp of (andibular 1 st molar – distal cusp 1'4. 6argest cusp of (andibular 1 st molar – (esio facial (?F(6F6F?F 1'!. (andibular 1st molar – 6@G70T ( crown dimension of
/(2 has 1 buccal. 1)3. (andibular 1st molar has 3 facial cusps 1)4. e+elopmental groo+e btn cusp and cusp of the (andibular 1 st molar is istofacial /<=T 0T6# onBt get tric-ed 1)!. (andibular 1st molar 2 roots O 3 canals 1)$. (andibular 1st molar – 2 mesisal canals 1)'. (andibular 1st molar – 6=7@ tooth. 1)*. t mid root cross section of (andibular 1 st molar# the largest is the mesial of the mandibular. 1*,. (andibular 1st molar – (706 root has G@7T70T faciolingual dimension of any other root. /thin- about (?2
ccl/s$on an% 1o#5$n- mo4ement
1*1. ? cusp of the mandibular molars occludes in the central fossa of the ma%illary molars 1*2. deal position and height of lingual cusps of mandibular 1 st molar accommodates wor-ing mo+ement
Man%$/la# )n% mola#
1*3. Groo+e pattern for (andibular 2nd molar – cross pattern 1*4. (andibular 2nd molar cruciform occlusal pattern. 1*!. =cclusal +iew greatest 6 diameter of (andibular 2 nd molar is mesial 193 rd. /ThatBs how you tell @ from 6 1*$. (andibular molars are the only P=0T7@=@ T77T> that are wider ( than 6 1*'. (andibular molars are the only (<?"6@ T77T> that are wider ( than 6. 1*). Crown of the (andibular 2nd molar inclines to the mesial and lingual. 1**. (andibular molars ha+e long a%is of their root apices facial and their crown lingual. 2,,. acial surfaces of mandibular molars are located medial to the border of ascending ramus.
Ma2$lla#y 3#% mola#s
2,1. 0ingle antagonist in CP 2,2. (a% 3 rd molar – molar that most frequently has only 3 cusps. 2,3. (a% 3 rd molars from an occlusal +iew – heart shaped because of missing 6 cusps Man%$/la# 3#% mola#s
2,4. 3rd molars – most +ariation in crown morphology. 2,!. 3rd molars – G@7T70T distal inclination of any other tooth
2,$. 3rd mandibular molars has 0>=@T70T @==T of any mandibular tooth 2,'. 3rd molars – G@7T70T morphological +ariation. (a%illary laterals are after that.
