Aligner (Invisalign) Biomechanics: The Hidden Truths

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  • Опубликовано: 2 окт 2024
  • This video presentation discusses the key biomechanical components of aligner-based orthodontic treatment. These features are not often discussed but are clinically critical for optimum performance of treatment. Here Dr. Madhur Upadhyay has presented a 'first principle' based understanding of the biomechanics of aligners, firmly supported by the available literature. He has shared biomechanical concepts, clinical tips, relevant literature, patient treatment & easy to understand illustrations.
    Timestamps
    00:00 Intro
    00:14 Knowledge & Experience
    01:41 Case 1
    03:46 My journey (outline)
    04:30 How big is the aligner industry? (Invisalign)
    06:03 What are the tools of aligner mechanics?
    09:43 How aligners treat different malocclusions?
    10:00 Deep bites
    13:36 Open bites
    18:28 Case 2
    19:22 Space closure
    24:36 How good are aligners at moving teeth?
    36:49 Force delivery
    38:39 Stress relaxation
    44:00 Case 3
    46:33 Why are aligners so ridiculously inefficient?
    46:43 Modulus of elasticity
    52:13 What can go wrong with aligners?
    54:31 What did we learn? Helpful tips!
    Want to know more about how biomechanics works in orthodontics. Sign up for an online course at courses.orthob...
    Get notified as soon as it arrives. A course that will dive deep into the fundamentals of clinical biomechanics in orthodontics with over 9 lessons & 25 modules of power-packed knowledge in the form of detailed videos, Q&As, notes, live interactive sessions and more.
    The course has been meticulously prepared and delivered by Dr. Madhur Upadhyay, Associate Professor & Clinical director at the Division of Orthodontics, University of Connecticut, USA. He has over 15 years of experience in conducting courses, seminars & workshops on biomechanics.
    Find out more about him at:
    www.orthobites...
    / madhur-upadhyay-a99738126

Комментарии • 39

  • @hiralsavani
    @hiralsavani Месяц назад +1

    Thank you doc for the eye opening information that you shared about aligner mechanics and materials. It clearly states that why someone is struggling with aligner for the difficult tooth movements. highly recommended..

  • @87gn199
    @87gn199 8 месяцев назад +2

    Great lecture... Did you have an engineering or heavy classical physics undergrad experience? Biomechanics? Would love to hear how you approached this early in your quest to understanding, thank you.

  • @Asathai1
    @Asathai1 Год назад +1

    Great lecture and presentation. Thank you so much Dr Madhur Upadhyay

  • @eric-h6y
    @eric-h6y Год назад +1

    Very impressive lecture. Great job !

  • @bonesl5465
    @bonesl5465 Год назад +1

    Excellent lecture

  • @jihadsaleh9004
    @jihadsaleh9004 Год назад +2

    Hi Doctor
    Thank you for this great presentation.. did the aligners closed the space in the case you started to treat ?
    Do you provide mentoring services to general dentists in doing orthodontics treatment ?

  • @draitazazulhaq
    @draitazazulhaq Год назад +1

    32:57
    Is just like roller-coaster effect if we use NiTi 0.016.
    Or 0.018 or NiTi rectangular wire Instead of using SS wire we get this effect and its called rolorcoster effect same is coming with these aligners from my opinion if we use 2mm sheet with power riges on incisers on gingival area we can get translation movement

  • @animasharma6192
    @animasharma6192 9 месяцев назад +1

    Sir, can we apply PAOO in aligners too. Kole's procedure.

    • @orthobitesorg
      @orthobitesorg  9 месяцев назад

      Yes, of course. Aligners are one of the many appliances that are used to move teeth. PAOO as it claims is used to accelerate tooth movement. However, as you will experience faster tooth movement, the aligner side effects will get exaggerated too. (orthobites.org).

  • @doorzcos3367
    @doorzcos3367 2 года назад +4

    Great lecture but I am still amazed when I hear root movement or tooth translation cannot be done efficiently using aligners specifically invisalign. Building gable bends for the teeth being translated in your clincheck combined with a vertical lingual attachment and a bevelled horizontal offset attachment on the buccal will yield predictable results all the time. All these side effects can be negated by overcorrections in the opposite direction. Cannot extrude posterior teeth you might say? Well how about building a reverse spee wire into the clincheck and having the right attachments, not breaking the aligner biomechanics rules, and see how fast you climb out of a deep bite. It works you just need to micromanage every single tooth.

    • @orthobitesorg
      @orthobitesorg  2 года назад +2

      Thank you for sharing your tips! Based on the current evidence, these are some of the steps should take to counter the drawbacks of aligners. Hopefully researchers can identify similar measures, apply & evaluate them in retrospective or prospective studies. This will then tell us how effective they are.

    • @emalieth8220
      @emalieth8220 2 года назад

      Indeed, very interesting lecture. I think that the literature on which this presentation is based is quite old in some cases, older than SmartTrack for example. That could explain some discrepancies in current observed results.

  • @revsen6405
    @revsen6405 Год назад +3

    Excellent lecture.. learnt a lot about basics of aligners

  • @ortodr.g5002
    @ortodr.g5002 Год назад +2

    most studies are quite old. isn't it possible that the technology of the aligners has changed the information in the video?

    • @orthobitesorg
      @orthobitesorg  Год назад +1

      Thank you for the comments. A couple of things: the basic material for aligners for years have been polyester, polyurethane or co-polyester, polypropylene, polycarbonate, ethylene vinyl acetate, and polyvinyl chloride, among others. These have not changed much over the years, which implies that the fundamental mechanical properties have not either. Second, the new research either clinical or in vitro in summary has not shown any change in behavior.

  • @divyajadhav4291
    @divyajadhav4291 Год назад +1

    Very well demonstrated and explained sir... Thankyou so much for this 🙏

  • @corazon7408
    @corazon7408 9 месяцев назад +1

    Thank you so much Doc

  • @aqilkavkhayev2268
    @aqilkavkhayev2268 Год назад +1

    So is it true that there is no point in using aligners instead of braces? I was just about to start studying aligners to use in my practice

    • @orthobitesorg
      @orthobitesorg  Год назад +1

      Aligners have utility based on patient, malocclusion, tooth movement, compliance However, it is not as broad as the companies or aligner 'gurus' make it appear. It is important to study them so that as a clinician you know when, where & how to use them.

  • @maikyst.photography
    @maikyst.photography Год назад +1

    I have a question , so when you mention the % in the tipping , you show a teeth with a torque movement , I do not know if its a language difference cuz my native language is Spanish , so this movement that you show is tipping or torque ? It confuse me cuz I want to know when I need to use thicker aligners , for torque movement or tipping movement

    • @orthobitesorg
      @orthobitesorg  Год назад +1

      Broadly tipping comes in two forms: uncontrolled ( root moves in one direction and crown in the other) & controlled tipping ( minimal movement of the root). The tipping movement shown at 25:20 is more toward uncontrolled tipping (UT). Here there is no torque being used ( because that is the classical definition for UT). CT needs some control over the so there is little torque used. Thicker aligners might help with torquing movement, however the evidence is not there.

    • @maikyst.photography
      @maikyst.photography Год назад

      @@orthobitesorg thank you for your answer

  • @kazmeensayyed3068
    @kazmeensayyed3068 2 года назад +2

    Great lecture. Honest one.

  • @angelc4794
    @angelc4794 2 года назад +2

    I need your help! My dentist had me change trays everyday (I didn't know this was unusual) but he had 0.056 mm activation per tray maybe even more for a total of around 1.4 mm. :( 25 trays in 30 days with IPR between tray 15 and 16. No one can help me decide if more damage than just my incisor dying happened because no one knows how the force was applied/compounded. I manage to get my tooth movement table and the staging should be even over all teeth over all 25 trays.
    0.392 mm/week velocity attempt with 1.4mm/month total
    Would you consider this excessive or dangerous?
    Would you help me figure out what happened on some level?

    • @orthobitesorg
      @orthobitesorg  2 года назад +1

      Appreciate the details that you have (assuming you are not a dentist yourself ?). There are many things, that go, into planning an orthodontic tx. To understand the dynamics of your treatment we will have to look at many details. However, in general, an optimal rate of tooth movement will be around 0.4 mm-1.2mm/month. Tipping movements will be on the higher side while pure root movements on the lower and everything else in between. So was the movement in your case excessive! Maybe? However, a 1. 4mm /month movement will not cause loss of vitality.

  • @bacsichinhnhathacsinguyenp9123
    @bacsichinhnhathacsinguyenp9123 Год назад +1

    Thanks a lot Doctor

  • @ortholee72
    @ortholee72 2 года назад +1

    Thanks for sharing your lecture.

    • @orthobitesorg
      @orthobitesorg  2 года назад

      You are welcome! Want to know more about how biomechanics works in orthodontics. Sign up for an online course at courses.orthobites.org/course...

  • @rafaelborelliortodontia2249
    @rafaelborelliortodontia2249 2 года назад +2

    Great lecture! Thank you for sharing!

    • @orthobitesorg
      @orthobitesorg  2 года назад

      You are welcome! Sign up to get notified as and when we post similar lectures/ courses on biomechanics. www.orthobites.org/subscribecontact

  • @printbally1130
    @printbally1130 Год назад +1

    🙏

  • @ivancastro365
    @ivancastro365 2 года назад

    Yo is it harmful for reproductive help???

  • @stefantodorovikj420
    @stefantodorovikj420 2 года назад +1

    thank you

    • @orthobitesorg
      @orthobitesorg  2 года назад

      You are welcome!

    • @orthobitesorg
      @orthobitesorg  2 года назад +1

      Sign up to get notified as and when we post similar lectures/ courses on biomechanics. www.orthobites.org/subscribecontact

  • @Dentrovert
    @Dentrovert Год назад +1

    Great presentation Thank you so much for sharing really appreciate it!

  • @mojtaba1348
    @mojtaba1348 2 года назад +1

    What a great lecture.