plz confirm the ans...DA

[docnc]

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1.largest cusp in tha mand 1st molar
a. distal
b. MF
c. ML (ans)
d. DL
e. DL

2.primary teeth MOST likely tp have an oblique ridge
a. max canine
b. max 1st molar
c. max 2nd molar (ans)
d. mand 1st molar
e. mand 2nd molar

3.which of the following muscles has an imp influence on the function of the mand, although it is not generally considered a muscle of mastication?
a. omhyoid
b. geniohyoid
c. mylohyoid (ans)
d. digastric
e. sternocleidomastoid

4.each of the following factors affects heights of cusp & depth of fossae on restorations except one....
a. curve of spee
b. intercondylar distance (ans)
c. vertical overlap of ant teeth
d. horizontal overlap of ant teeth
steepness of articular eminence

5.when the dentist examines the normal max arch from a sagittal view, which of the following tooth inclinations can be observed?
a. post teeth are mesially inclined
b. ant teeth are stright with no inclinations
c. ant teeth are distally inclined
d. post teeth are straight with no inclinations
e. post teeth are distally inclined

6. accessory ligament of the TMJ
a. capsular
b. collateral
c. stylohyoid
d. sphenomandibular
e. temporomandibular

7. smallest incisal embrasures
a. max CI
b. mand CI

8. what approximate % of the total buccolingual dimension of a post tooth does the occlusal table represents
a. 30-40
b. 40-50
c. 50-60
d. 60-70
e. more than 100

 

[runrabbitrun]

1.largest cusp in tha mand 1st molar
a. distal
b. MF
c. ML (ans)
d. DL
e. DL

2.primary teeth MOST likely tp have an oblique ridge
a. max canine
b. max 1st molar
c. max 2nd molar (ans)
d. mand 1st molar
e. mand 2nd molar

3.which of the following muscles has an imp influence on the function of the mand, although it is not generally considered a muscle of mastication?
a. omhyoid
b. geniohyoid
c. mylohyoid (ans)
d. digastric
e. sternocleidomastoid

4.each of the following factors affects heights of cusp & depth of fossae on restorations except one....
a. curve of spee
b. intercondylar distance (ans)
c. vertical overlap of ant teeth
d. horizontal overlap of ant teeth
steepness of articular eminence

5.when the dentist examines the normal max arch from a sagittal view, which of the following tooth inclinations can be observed?
a. post teeth are mesially inclined
b. ant teeth are stright with no inclinations
c. ant teeth are distally inclined
d. post teeth are straight with no inclinations
e. post teeth are distally inclined

6. accessory ligament of the TMJ
a. capsular
b. collateral
c. stylohyoid
d. sphenomandibular
e. temporomandibular

7. smallest incisal embrasures
a. max CI
b. mand CI

8. what approximate % of the total buccolingual dimension of a post tooth does the occlusal table represents
a. 30-40
b. 40-50
c. 50-60
d. 60-70
e. more than 100

5. D. (although I could see why this may be wrong)
6. D
7. B
8. C or D, I can't decide

 

[docnc]

thanks a lot for your prompt reply runrabbitrun.....so do you agree with 1st 4 questios.....5.post teeth distally inclined...( i thought).....will you plz explain for 5 questions....

thnx once again

 

[puncho]

5. a
8. c

 

[Lidopaine82]

I was thinking that question 1 should be MF not ML. To support my answer i looked in my text book:

"The mesiobuccal cusp is slightly larger than either of the two lingual cusps, which are almost equal to each other in size; the distobuccal cusp is smaller than any one of the other three mentioned, and the distal cusp is in most cases much the smallest of all."

(Ash, Major M.. Wheeler's Dental Anatomy, Physiology and Occlusion , 8th Edition. Saunders Book Company, 012003. 12.1.1.5).
<vbk:0-7216-9382-2#outline(12.1.1.5)>


Does anyone else agree?

 

[Ride]

I agree - also according to DA 1996 released exam question#120 the answer is MF cusp

 

[docnc]

i agree...even i studied the same thing in college but when i was going through notes of university of pacific dds...they say that there are 3 cusps buccally present and 2 cusps lingually present in the mand 1st molar...which will make ML cusp the largest cusps.......ML>DL>MB>DB>D 🙁

 

[KOM]

thanks a lot for your prompt reply runrabbitrun.....so do you agree with 1st 4 questios.....5.post teeth distally inclined...( i thought).....will you plz explain for 5 questions....

thnx once again

You're right...posterior teeth will be distally inclined. Also % = 50-60 for the occlusal table.

 

[ProbedSulcus]

You're right...posterior teeth will be distally inclined. Also % = 50-60 for the occlusal table.

posterior teeth will be mesially inclined

 

[skydentist]

1-I am too confused whether its MB or ML cusp. As told,wheelers and 1996 released paper says MB but decks 2006-07 says ML cusp.

2-oblique ridge in primary Maxillary 2nd molar as they have alot of resemblance to permanent molars.

4-
curve of spee, vertical overlap of ant teeth,
horizontal overlap of ant teeth,and
steepness of articular eminence all affect factors affects heights of cusp & depth of fossae on restorations .

5-post teeth are mesially inclined

6-sphenomandilar and stlomandibular are accessory ligaments.

7-smallest embrassure is between max central incisors.

8-60-70%

 

[cutedoc12]

mand post teeth are mesially inclined whereas max post teeth are distally inclined .....

 

[docnc]

mand post teeth are mesially inclined whereas max post teeth are distally inclined .....

yup..you are absolutely right😀

 

[docnc]

1-I am too confused whether its MB or ML cusp. As told,wheelers and 1996 released paper says MB but decks 2006-07 says ML cusp.😕

2-oblique ridge in primary Maxillary 2nd molar as they have alot of resemblance to permanent molars.

4-
curve of spee, vertical overlap of ant teeth,
horizontal overlap of ant teeth,and
steepness of articular eminence all affect factors affects heights of cusp & depth of fossae on restorations .

5-post teeth are mesially inclined ...it depends on whether it is max or mand

6-sphenomandilar and stlomandibular are accessory ligaments.

7-smallest embrassure is between max central incisors.smallest incisal embrsures is present between mand CL..

8-60-70%

thanks to all for your help...😀

 

[cutedoc12]

8 is C ....50-60%

 

[armorshell]

Seems to me that from a sagittal view you can't discern M/D inclination in the posterior teeth, so D would be the correct answer.

I've been taught the in the mand. 1st, the ML cusp is the largest so I'm sticking with that.

I'd also love to hear the justifications for mylohyoid on 3. Seems to me that digastric would be just as good of an answer, though both of them depress the mandible and aren't considered muscles of mastication.

 

[Streetwolf]

The mylohyoid makes no significant contributions to movement of the mandible. (Anterior) digastric definitely depresses it. Mylohyoid probably does something in the way of stabilization.

This comes straight from my anatomy lectures.

 

[armorshell]

Yeah, I think technically the mylohyoid can depress the mandible if the hyoid is stabilized but the amount of force it can apply is so small to the point that it's functionally negligible. So much so that I'm willing to completely forget that I said that and just completely agree with you.