What are static and dynamic occlusion?

Static occlusion refers to the contact of teeth when the jaw is closed and not moving, while dynamic occlusion involves the movement of teeth when the jaw moves.

What are the three planes discussed in the video?

The three planes are the coronal (front or back view), sagittal (side view), and axial (aerial view).

What does the 'Twin Peaks' drawing represent?

The 'Twin Peaks' drawing represents the overlapping cusps from the coronal view to help understand occlusal contacts.

What are functioning cusps?

Functioning cusps are those that contact the opposing teeth during static occlusion, specifically the lingual cusps of upper teeth and buccal cusps of lower teeth.

What are centric stops?

Centric stops refer to the points where functioning cusps contact opposing teeth in static occlusion.

What is the 'bull rule'?

The 'bull rule' refers to the buccal cusps of upper teeth and lingual cusps of lower teeth, which do not function during occlusion.

Why is Dr. Lu Bol mentioned?

Dr. Lu Bol is a mnemonic to remember that lingual cusps of the upper teeth and buccal cusps of the lower teeth are the functioning cusps.

What are non-functioning cusps?

Non-functioning cusps are those that hang over the opposite teeth and don't contact them during static occlusion.

How can the video’s content help in exams?

The video provides drawings and memory aids that can be reproduced during exams to help identify occlusal contacts.

What is the significance of the numbers adding up to 33 in dental occlusion?

This is a shortcut for quickly identifying occlusal contacts, although it's not always accurate.

STATIC OCCLUSION - Occlusal Contacts & Picket Fence

00:08:37

https://www.youtube.com/watch?v=3PuuHkdJoVo

Zusammenfassung

TLDRRyan introduces static occlusion concepts, explaining the importance of understanding how teeth contact when the jaw is closed and not moving. He uses diagrams and a mnemonic, Dr. Lu Bol, as an aid to remember which cusps are functioning and which are not. Ryan outlines three anatomical planes to view dental structures - coronal, sagittal, and axial. He describes how in static occlusion, the lingual cusps of upper teeth and buccal cusps of lower teeth function to contact opposing teeth, a concept important for dental students, especially during exams, with tips and examples on how to visualize and remember these concepts efficiently.

Mitbringsel

🦷 Static occlusion focuses on teeth contact when the jaw is not moving.
🖼️ Three viewing planes: coronal, sagittal, and axial are used to analyze occlusion.
📝 Use of diagrams helps simplify the understanding of occlusal contacts.
🧠 'Dr. Lu Bol' is a mnemonic to remember functioning cusps.
👥 Functioning cusps involve lingual cusps of upper and buccal cusps of lower teeth.
🔎 Importance of centric stops for functioning cusps in occlusion.
🔄 Non-functioning cusps overhang and do not contact opposing teeth.
🎨 'Twin Peaks' drawing aids in understanding overlapping cusps.
📑 Reproducing drawings in exams can assist in identifying occlusal contacts.
📚 Descriptions help prepare for national board dental exams.

Zeitleiste

00:00:00 - 00:08:37
Ryan introduces the topic of static and dynamic occlusion, beginning with static occlusion, which involves understanding occlusal contacts when the jaw is closed and stationary. He emphasizes the importance of practice using a dental model (dint afore) and presents drawings as learning aids. Ryan explains the concept of occlusion using multiple planes of view: coronal, sagittal, and axial, and describes an ideal occlusion where maxillary teeth slightly overlap mandibular teeth in a specific pattern. This setup enables the functioning cusps (lingual of uppers, buccal of lowers) to contact opposing teeth, which is crucial for understanding static occlusion.

Mind Map

Häufig gestellte Fragen

What are static and dynamic occlusion?
Static occlusion refers to the contact of teeth when the jaw is closed and not moving, while dynamic occlusion involves the movement of teeth when the jaw moves.
What are the three planes discussed in the video?
The three planes are the coronal (front or back view), sagittal (side view), and axial (aerial view).
What does the 'Twin Peaks' drawing represent?
The 'Twin Peaks' drawing represents the overlapping cusps from the coronal view to help understand occlusal contacts.
What are functioning cusps?
Functioning cusps are those that contact the opposing teeth during static occlusion, specifically the lingual cusps of upper teeth and buccal cusps of lower teeth.
What are centric stops?
Centric stops refer to the points where functioning cusps contact opposing teeth in static occlusion.
What is the 'bull rule'?
The 'bull rule' refers to the buccal cusps of upper teeth and lingual cusps of lower teeth, which do not function during occlusion.
Why is Dr. Lu Bol mentioned?
Dr. Lu Bol is a mnemonic to remember that lingual cusps of the upper teeth and buccal cusps of the lower teeth are the functioning cusps.
What are non-functioning cusps?
Non-functioning cusps are those that hang over the opposite teeth and don't contact them during static occlusion.
How can the video’s content help in exams?
The video provides drawings and memory aids that can be reproduced during exams to help identify occlusal contacts.
What is the significance of the numbers adding up to 33 in dental occlusion?
This is a shortcut for quickly identifying occlusal contacts, although it's not always accurate.

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Untertitel

Automatisches Blättern:

00:00:00
hey guys it's Ryan in this group of
00:00:03
videos we're gonna talk about static and
00:00:05
dynamic inclusion and so we're gonna
00:00:08
start with static occlusion basically
00:00:10
when the jaw is closed and not moving
00:00:12
and we'll focus on occlusal contacts so
00:00:18
this is a tricky concept the more you
00:00:21
practice the better you're gonna get I
00:00:23
think the best thing you can do is using
00:00:25
a dint afore and being able to
00:00:27
manipulate it in your hands is really
00:00:30
the best way to learn this kind of stuff
00:00:31
but I'm gonna do my best to help you
00:00:33
show you guys some drawings and
00:00:35
shortcuts that I think will really help
00:00:37
out so there are three planes that we
00:00:40
operate in the coronal or the straight
00:00:43
on front or back view the sagittal side
00:00:46
view and the axial are sort of aerial
00:00:49
view and I have these easy drawings that
00:00:52
you can memorize and reproduce for exams
00:00:54
for each one of these three planes so
00:00:57
we'll go over these throughout the video
00:01:00
so this is an image I actually got from
00:01:03
one of my other videos but it's a great
00:01:05
place to start I sort of think of it
00:01:08
like you're riding in a Magic School Bus
00:01:10
you go inside your mouth and you sit
00:01:13
kind of at the back of your tongue
00:01:15
facing forward so this is the left side
00:01:18
of your mouth I'm looking at like a
00:01:19
cross-section of the molars and this is
00:01:22
the right side of your mouth and if we
00:01:26
kind of overlay this more anatomically
00:01:28
correct version you can see your tongues
00:01:30
in the center and your cheeks on the
00:01:32
outside with your upper teeth just
00:01:35
overlapping the lower teeth slightly and
00:01:38
we'll come back to this and a lot more
00:01:39
detail later on so if you notice this is
00:01:43
really the ideal overlap where the
00:01:45
maxillary teeth are displaced about half
00:01:49
a cusp out to the buccal so there's this
00:01:52
beautiful puzzle piece configuration so
00:01:57
we're gonna zoom in on the left side and
00:01:59
this is what I call the Twin Peaks
00:02:01
drawing so this is our first drawing
00:02:03
from the kernel view and basically you
00:02:06
have these zigzags
00:02:07
showing the overlapping cusps we just
00:02:10
talked about so when you bite down and
00:02:12
these teeth come together
00:02:13
the ideal occlusion the lingual cusps of
00:02:16
the upper teeth and the buccal cusps of
00:02:19
the lower teeth are what contact the
00:02:22
opponent or what contact and this sort
00:02:25
of static occlusion scenario and these
00:02:27
are called the functioning cusps so and
00:02:32
keep in mind I use buccal and facial
00:02:34
interchangeably and so this is a sort of
00:02:38
the standard the really good thing to
00:02:42
sort of lock in your brain for the rest
00:02:43
of thinking about occlusion and so I
00:02:48
think of it like lingual of uppers and
00:02:50
buccal of lowers dr. Lu bol and he is
00:02:55
completely made up I just totally made
00:02:59
this up but if it helps you remember
00:03:01
then that's awesome you could also go
00:03:03
with palatal of the uppers and that
00:03:06
would be pupal but whatever works for
00:03:09
you then just however you can remember
00:03:11
it that works for you
00:03:13
so these are basically referring to the
00:03:15
centric stops and that's where the
00:03:18
functioning cuffs are contacting the
00:03:20
opposing teeth in static occlusion and
00:03:23
this is basically just a more
00:03:25
anatomically correct version of that
00:03:27
where the red points are referring to
00:03:31
the eccentric stops and just like as a
00:03:34
as a reference the functioning cusps
00:03:37
tend to be a little bit more blunt ER
00:03:39
and centered over the opposite tooth
00:03:41
they can also be called the supporting
00:03:43
cusps the holding cusps and these
00:03:46
contact points like I said are sometimes
00:03:49
called the centric stops so that means
00:03:52
the other cuts we didn't talk about the
00:03:55
buckle of the uppers and the lingual of
00:03:57
the lowers sometimes referred to as the
00:04:00
bull rule that they're kind of hanging
00:04:03
over the opposite teeth and they're
00:04:05
called the non-functioning or the non
00:04:08
supporting or the non holding cusps all
00:04:12
right so let's jump into our second
00:04:14
picture here and I have to give credit
00:04:16
where credit is due this is actually
00:04:18
from past the dental board's
00:04:20
his YouTube channels awesome go check
00:04:22
him out but I sort of adapted this so we
00:04:25
can talk about it and a little bit
00:04:26
way so you start by drawing nine
00:04:30
vertical lines on top and then you draw
00:04:33
this zigzag pattern and then you draw
00:04:36
nine more vertical lines on the bottom
00:04:39
and basically what you have here is you
00:04:42
have all these teeth represented with
00:04:44
all the cusps and it sort of mimics what
00:04:48
you'd see from like a right or I guess a
00:04:51
left depending on how you look at it
00:04:53
sagittal view of the mouth and so we can
00:04:57
fill in what all of the teeth here are
00:05:01
represented so you have the three molars
00:05:03
two premolars canine and the two
00:05:05
incisors you can see how everything on
00:05:07
the bottom sort of offset half a cusp to
00:05:11
the mesial which is how it should be in
00:05:13
an ideal occlusion and one thing I want
00:05:16
to point out is this line here is sort
00:05:19
of offset and that's to include the
00:05:22
pesky distal cusps of the mandibular
00:05:24
first molar and we also want to remember
00:05:27
our doctor loophole the lingual of the
00:05:31
uppers and the buckle of the lowers is
00:05:34
what's going to be doing the contacting
00:05:36
here so if someone asked us what's
00:05:40
contacting in the central fossa of the
00:05:43
mandibular first molar so we could kind
00:05:46
of go right to here and we'd see oh it's
00:05:50
the mesial lingual cusp of the maxillary
00:05:54
first molar that's contacting right
00:05:56
there if someone asked us what contacts
00:06:00
the distal marginal Ridge of the
00:06:03
mandibular first premolar we'd say well
00:06:06
here's the distal marginal Ridge of the
00:06:08
mandibular first premolar and then it
00:06:11
would be the lingual cusps of the
00:06:14
maxillary first premolar is contacting
00:06:17
right there so now one thing to note is
00:06:21
this might vary from school to school
00:06:23
but the lingual cusps of the upper
00:06:26
premolars usually contact in the distal
00:06:29
triangular fossa of the lower premolar
00:06:33
so this kind of cuts would be offset a
00:06:35
little bit this way this cuts would be
00:06:37
offset a little bit this way but that's
00:06:39
really depends
00:06:40
depends whether they're teaching a tooth
00:06:43
to to tooth or tooth to one tooth
00:06:46
occlusion so you can kind of keep that
00:06:49
in mind but for all intents and purposes
00:06:51
this is a really really awesome thing to
00:06:54
use whether for your exams in dental
00:06:56
Anatomy for the National Board Exam this
00:07:00
is like your go-to just reproduce this
00:07:02
on every paper and have this ready to go
00:07:07
in your arsenal because this will really
00:07:09
help you pinpoint where things are
00:07:12
contacting so what we can do is you go
00:07:18
ahead and we'll have this up here and
00:07:21
you can go ahead and practice these
00:07:23
examples you can pause the video and
00:07:25
we'll go over them in just a little bit
00:07:30
alrighty so here are the answers
00:07:34
so hopefully this matches up with what
00:07:36
you got and you can notice this is sort
00:07:39
of a shortcut here but you can notice
00:07:41
that all the numbers 20 + 13 19 and 14 +
00:07:45
3 + 30 they all add up to 33 it's a nice
00:07:50
shortcut not always true but it is a
00:07:53
nice kind of quick way if like a
00:07:54
professor called on you and you had to
00:07:56
answer you know what occludes with
00:07:58
number 19 you could add it up quick in
00:08:00
your head and say 14 but again nine
00:08:03
times out of 10 that is the case but not
00:08:05
always
00:08:08
alrighty and this is where we're gonna
00:08:10
stop the first video thanks so much for
00:08:13
watching guys for the next video we're
00:08:15
gonna talk more about dynamic occlusion
00:08:18
so we're gonna take this one step
00:08:20
further we're gonna first figure out
00:08:23
where a cusp contacts and then we're
00:08:25
gonna see where that cusp moves
00:08:27
depending on where the mandible moves
00:08:30
alright thanks so much for watching guys
00:08:33
I'll see you in the next video bye-bye