STATIC OCCLUSION - Occlusal Contacts & Picket Fence

00:08:37
https://www.youtube.com/watch?v=3PuuHkdJoVo

摘要

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.

心得

  • 🦷 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.

时间轴

  • 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.

思维导图

Mind Map

常见问题

  • 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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  • 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
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    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
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    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
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    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
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    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
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    sagittal view of the mouth and so we can
  • 00:04:57
    fill in what all of the teeth here are
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    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
标签
  • static occlusion
  • occlusal contacts
  • dental anatomy
  • functioning cusps
  • centric stops
  • coronal view
  • sagittal view
  • axial view
  • mnemonics
  • dental exams