mand 1st molar lingual cusp question

[1992Corolla]

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1) On the decks there is a statement that says that:

"It is important to restore the lingual cusps of the mandibular 1st molar as these are important in working movements."

Is this a mistake? I want to say it is because I was under the impression that you don't want working or non working interferences at all. There was nothing said about group function. It was just a statement.

2) Tell me this:
In a working side movement of the mandible, the oblique ridge of a maxillary first molar passes through which sulcus of a permanent mandibular first molar?
a) MB sulcus
b) DB sulcus
c) ML sulcus
d) DL sulcus

The answer they give is conflicting with mine and I want to compare your answers.

With complete respect to the users of this part of this forum, please answer with complete sentances and spell the whole word out. Grammer is important in your quest to get a dental degree, you might as well practice right now. Thanks.

 

[monreal]

1) On the decks there is a statement that says that:

"It is important to restore the lingual cusps of the mandibular 1st molar as these are important in working movements."

Is this a mistake? I want to say it is because I was under the impression that you don't want working or non working interferences at all. There was nothing said about group function. It was just a statement.

2) Tell me this:
In a working side movement of the mandible, the oblique ridge of a maxillary first molar passes through which sulcus of a permanent mandibular first molar?
a) MB sulcus
b) DB sulcus
c) ML sulcus
d) DL sulcus

The answer they give is conflicting with mine and I want to compare your answers.

With complete respect to the users of this part of this forum, please answer with complete sentances and spell the whole word out. Grammer is important in your quest to get a dental degree, you might as well practice right now. Thanks.

Working side contact is not always indesirable. It can be present (and maintained after treatment) without problems. Sometimes we intentionally creat it in treatment plans envolving the canine, ie: lost canine replaced by implant or bridge, or even a mechanically challenging bridge with the canine present as a pilar. Then remember, inner inclines of lingual cusps of lower molars are called guiding plans. So they gotta guide something oneday 🙄.

As for the second question, I remember that oblique ridge passes through the lingual sulcus in working, and disto-buccal in non-working. Now if I remember correctly, the lower first molar has 3 sulci (lingual, buccal, and distobuccal), if I got this in an exam I would suppose that A, C, and D are wrong because they don't even exist, and I would choose B... Stupid reasoning, but...

I am curious to know the given answer!

I am a FTD. Please excuse my English and my dentistry🙂.

 

[monreal]

Bump... I am still curious 🙂

 

[MBM76]

does anyone know intercondylar distance and steepness of articulat eminancce have to do whit height of cusp or depth of fossa?
and height of cusp in horizontal overlap?
what is the refrence for occlusion in NBDE 1😕

 

[hopekeepsmegoin]

does anyone know intercondylar distance and steepness of articulat eminancce have to do whit height of cusp or depth of fossa?
and height of cusp in horizontal overlap?
what is the refrence for occlusion in NBDE 1😕

hey...
i had atleast 15 questions related to this concept in my exam and was COMPLETELY clueless!!!!!
can someone please tell me where sud i read these concepts from because they are not there in decks and kaplan!

 

[MBM76]

YES ME TOO hopekeepsmegoin! I hope someone has the answer

 

[dreamchaser]

increase in intercondylar distance decreases angle b/w laterotrusive n mediotrusive so movement of mandible also decreases

more steeper articular eminence means more angle with condyle i.e. more angle b/w articulating cusp ridges that means more steeper cusp