Dental Anatomy Questions

[TOM_24]

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I would like t start posting some of imp question regarding Dental anatomy For NBDE part one. So lets share question and find ut the answer together 🙂


1)what is the most teeth subjected to fracture during extraction(Maxi first premolars) ??

2) what is the most teeth need subjected to caries( mandi first molar) ???


3) RARELY restored (CANINE) ????



4)Mandi primary lateral inci resemble which of teeth ??


5) Primary teeth not resemble any other teeth (mandi primary first molar) ????



6) Longest crown ?? Mandi Canine


7)Longest root??? maxi Canine

8)widest M-D tooth>>>> mandi First molar


9)MOST teeth incline distally except ??? Mandi Canine>>> mis incline



10)Only tooth with one antagonist ??? the mandibular central & maxillary wisdom ??


Hey guys. Please let me make sure that all the answer mention above is true. I will be appreciated by posting your comment and question.


GOOD LOOK ALL👍

 

[dr.ndc]

1)what is the most teeth subjected to fracture during extraction(Maxi first premolars) ?? TRUE

2) what is the most teeth need subjected to caries( mandi first molar) ???
THATS TRUE BECAUSE THEY ARE FIRST PERMANENT TEETH TO APPEAR SO THEY REMAIN IN ORAL CAVITY FOR THE LONGER TIME HENCE MORE SUBJECT TO CARIES

3) RARELY restored (CANINE) ???? MANDIBULAR CANINE



4)Mandi primary lateral inci resemble which of teeth ?? PERMANENT CENTRAL INCISOR


5) Primary teeth not resemble any other teeth (mandi primary first molar) ???? TRUE. PRIMARY FIRST MOLARS RESEMBLES NO TEETH BUT PRIMARY FIRST MOLAR DO RESEMBLE TO SECOND PREMOLAR



6) Longest crown ?? Mandi Canine NOT SURE BUT THINK THAT TO B TRUE


7)Longest root??? maxi Canine DEFINITELY

8)widest M-D tooth>>>> mandi First molar THATS AGAIN TRUE


9)MOST teeth incline distally except ??? Mandi Canine>>> mis incline NOT SURE



10)Only tooth with one antagonist ??? the mandibular central & maxillary wisdom ??
THATS ALSO RIGHT
ITS BEEN A LONG TIME I STUDIED DENTAL ANATOMY.. ANY CORRECTIONS WILL BE APPRECIATED

 

[TOM_24]

Thank you Dr. ndc;


I am just wondering why you said that primary mandi lateral inci is resemble Maxi central inci? I will be appreciated if you CAN answer this question? and plz if u have any other questions post it here so we can share information .

Thank you again and again 🙂

 

[dr.ndc]

primary mandibular lateral incisors resemble permanent mandibular central incisors and not maxillary.. thats correct acc to me ....anyone else who can confirm this because i wrote my part I more than an year ago

 

[NileBDS]

These questions can/should be discussed on their respective NBDE thread.

Moving.

 

[TOM_24]

what is the largest embressure ? is it between MAX Canine & MAX first premolar ???

any answer?

 

[docnc]

what is the largest embressure ? is it between MAX Canine & MAX first premolar ???

any answer?

yes, you are correct largest incisal/occlusal embrasure is between MAX Canine & MAX first premolar...🙂

 

[TOM_24]

Hey guys . Actually I have been read the contact question from different resources and different information plz lets share our information there:


Upper FIRST PREMOLAR :

mesi contact>> middle third ?

dist contact>> occlus thrid?


facial max convexity>>> cerv third?

lingual max convexity >> middle third ?


UPPER SECOND PREMOLAR :

mesi contact>>> occlu third ??

dist contact>>> cervi third ???

facial and lingual convexity as upper premolar??


IF any 1 have an answer rather than that, plz let me know 🙂

good luck all👍

 

[collegeboy30000]

...

Upper FIRST PREMOLAR :

mesi contact>> middle third ? Yes

dist contact>> occlus thrid? Distal contact is also located in the middle third


facial max convexity>>> cerv third?the facial height of contour is approx 0.5mm, and is located at the junction of the cervical and middle thirds of the crown

lingual max convexity >>middle third ? lingual height of contour is approx. 0.5mm , and is located in the middle third of the crown


UPPER SECOND PREMOLAR :

mesi contact>>> occlu third ??the mesial and distal contact areas are located in the middle third of the crown

dist contact>>> cervi third ??? the mesial and distal contact areas are located in the middle third of the crown

facial and lingual convexity as upper premolar??the facial and lingual height of contour is located near the junction of the middle and cervical thirds of the crown.
-

IF any 1 have an answer rather than that, plz let me know

good luck all

 

[NYtimes]

between which L embressure is smaller that facial one?

- Max first premolar & max second pre
- max 2nd molar and third molar
- mand 1st molar and 2nd molar
- mand 1st premolar and mand 2nd premolar

answer key says last one why????

 

[TOM_24]

As far as I know(correct me if I am wrong ) :


The facial embrasure larger than lingual embrasure in all teeth except 4 :


Mndi Ant teeth & Mxil Molars teeth(lingual larger than facial )


Please if any 1 have other answer leme know🙂

thanks

 

[NYtimes]

As far as I know(correct me if I am wrong ) :


The facial embrasure larger than lingual embrasure in all teeth except 4 :


Mndi Ant teeth & Mxil Molars teeth(lingual larger than facial )


Please if any 1 have other answer leme know🙂

thanks

Thanks for your reply. Actually based on what you say, any of those last two choices should be correct, right?

 

[NYtimes]

which one usually has the steepest cust inclines?

Max 1 premolar
max 2 premolar
Mand 1 premolar
Mand 2 premolar

answer key says Max 1 premolar. I was thinking about mand 1 premolar. I think answer key is wrong. does anyone have any idea?

Thanks

 

[TOM_24]

which one usually has the steepest cust inclines?

Max 1 premolar
max 2 premolar
Mand 1 premolar
Mand 2 premolar

answer key says Max 1 premolar. I was thinking about mand 1 premolar. I think answer key is wrong. does anyone have any idea?

Thanks

I would say that the maxi first premolar has steepest cusp incline(facial one)👍

 

[TOM_24]

please correct me if I am wrong:

Greatest Facio-ling Diameter in PRIMARY TEETH is>> mandibular second molar?


Please if any 1 have any idea let me know🙂

Thanks a million👍

 

[docnc]

please correct me if I am wrong:

Greatest Facio-ling Diameter in PRIMARY TEETH is>> mandibular second molar?


Please if any 1 have any idea let me know🙂

Thanks a million👍

i think it should be max second molar.(mand molars are more wide mesiodistally)

correct me if i am wrong

 

[TOM_24]

i think it should be max second molar.(mand molars are more wide mesiodistally)

correct me if i am wrong

HI docnc,


I couldt agree more with you regarding my question. Logically because the maxi second molar (primary) resemble Maxi FIRST MOLAR(permanent ), so it should me WIDER FACIO-LING IN PRIMARY.


BUT kaplan say that the mandibular second molar is wider F-L than any other primary teeth .


Please if any 1 have any clarification regarding this point let us know guys.


good luck 👍

 

[TOM_24]

largest incisal/occlusal embrasure is between MAX Canine & MAX first premolar(decks) .


largest incisal/occlusal embrasure is between MAX Canine & MAX second inci (released 1996 exam) ?


On witch one we should RELAY !! for GOD sake any answer???

 

[docnc]

largest incisal/occlusal embrasure is between MAX Canine & MAX first premolar(decks) .


largest incisal/occlusal embrasure is between MAX Canine & MAX second inci (released 1996 exam) ?


On witch one we should RELAY !! for GOD sake any answer???

ans . largest embrasure is between max canine & max 1st premolar cause as you will see the proximal contacts of all teeth from facially,proximal contacts are located more incisally (occusally)from posterior to anterior..and the mesial contact area is always more incisally than distal..so the distal contact of max canine is at the junction & mesial contact of max 1st premolar is at middle which is greater then the embrasure of any other teeth...

i hope this thing will help you....or you can see any diagram showing the proximal contacts facially...it will become more clear....🙂

 

[TOM_24]

Please if any 1 have any idea answer this question:

60% of maxi First Molar with (4 canals)

30% of man First Molar with (4 canals)


what I am trying to say is that the probability to find 4 canals is more in maxi Molars than mandibular one.


Am I right? thank u guys🙂

 

[docnc]

Please if any 1 have any idea answer this question:

60% of maxi First Molar with (4 canals)

30% of man First Molar with (4 canals)


what I am trying to say is that the probability to find 4 canals is more in maxi Molars than mandibular one.

yes,thats correct...


Am I right? thank u guys🙂

In max molars there are MB(2) , DB(1) & P(1) : 4 canals
But in mand molars ,In 60% of cases there are 3 canals :1D , 1MB & 1ML
In 40% of cases there are 4 canals : 1DB , 1DL ,1MB & 1ML.

 

[TOM_24]

In max molars there are MB(2) , DB(1) & P(1) : 4 canals
But in mand molars ,In 60% of cases there are 3 canals :1D , 1MB & 1ML
In 40% of cases there are 4 canals : 1DB , 1DL ,1MB & 1ML.

.


thank you docnc for confirming my answer🙂

 

[docdk]

hey did u get the ans for this
Greatest Facio-ling Diameter in PRIMARY TEETH is>> mandibular second molar?
bec i hv read this tooo abt mand 2 molar
plzz confirm the ans

 

[TOM_24]

when you move the mandi to the right... wat is the contact in working and non working side will occur in the mandi first molar?


Working side(RIGHT)>>> mandi mesio buccal >> pass through buccal groove of maxil first molar...


mesio lingual cusp of maxil first molar>> pass through lingulal groove of manib first molar.

disto lingual of mand first molar contact>>> lingual incline of buccal cusp of maxil first molar..


NON WORKING SIDE (LEFT)>>> I called it clapping of supporting cusp .. contact the upper lingual and buccal lower ..



please if any 1 have another answer .. plz do correct mee.... thanks a lot🙂

 

[TOM_24]

1)which of the following is wider FL than MD:

A)mandi first premolar
b)maxi first molar


2)which has important role on mastication:

A)Digastric muscle
B)Geniohoyoid
C)omohoyoid
D)maylohyoid


3)which surface of mandibular first molar dont include (longitudinal groove )

SURFACE ROOT

A) M M

B) D M

C) M D

D) D D




4)which MMR LOCATED more CERVICALLY than DMR :

A)Mandi first molar
B)Mandi first premolar
C)Maxi first molar
D)Primary mandi first molar


By the way.. cervically mean higher ..... occlusally mean lower?? I am right



Please if any 1 have any idea.. plz let us know. thanks a lot🙂