Molar_Root_Movement | Essential Biomechanics

[@ortodonciapedrocastillo]

Love your videos! Your explanations are very clear and simple. While I was watching this video, my daughter was nearby, and asked me why was I watching frozen without her... I noticed later the song! 😁

[@essentialbiomechanics9381]

Great song!

[@shashiwickramanayaka]

Hi doctor.. Do you do such treatments ???

[@sanjeevluintel1812]

These kinds of visualization are really helpful, sir. Keep up the good work.

[@dr.ayushitoley271]

Sir, your videos make biomechanics really easier to understand, thank you. Just a small request, try using the background sound on a lower volume, it gets distracting sometimes. Your videos are sooo needful that they will be great even without sound.😊

[@essentialbiomechanics9381]

Thanks for your suggestion and feedback Dr Toley!

[@geidicalcagno]

Oh my God Guys Doctor's❤ you are loved, great work..the music is so nice too👍❤🙏love being a DENTIST❤LOVE ORTHODONTIC.

[@manarhafez4641]

This is great. Where can I find this template in a printable format?

[@essentialbiomechanics9381]

thanks Dr. Please get in contact with me by Instagram @essentialbiomechanics and DM me TEMPLATE

[@m.m.3798]

Muy bueno, xfavor pongan subtítulos tengan en cuenta a toda la comunidad latina. Se entiende bastante el inglés pero con español sería genial le darían mucha más vista. Gracias, hace tiempo estoy pidiendo eso.

[@essentialbiomechanics9381]

Pido disculpas, Dr., pero no tenemos a nadie con dominio del español en el equipo.

[@maciejwarnecki9060]

Very nice presentation. Only one thing to add: in clinical scenario the teeth 33,34,35 might move 1/2-1mm to the distal due to molar crown pulling them back (rowboat effect). bonding one of the teeth to the screw (preferably with stiff wire)would negate this effect. Personally I thought You would prefer a cantilever in this case ;) much easier to apply clinically then insert anything from distal in Buccal tube in patient’s mouth.

[@essentialbiomechanics9381]

Good observation. In the simulation, I've stopped the conjugation in the 33 because it was part of the rigid model. In the clinic, I use a rigid segment from 35 to opposite molars. Even with this care, you're correct about the possible side effects. In relation to the cantilever, it would produce a significant and undesirable extrusion, especially in a real scenario in which extrusion occurs faster than the mesial root movement.

[@maciejwarnecki9060]

@@essentialbiomechanics9381 thank You for Your quick reply. Have You thought about ligating the terminal molar to the mini screw to negate the extrusive effect?

[@maciejwarnecki9060]

And regarding the extrusive force: it can be effectively minimized by increasing length of the cantilever or bending loops to increase M/F ratio. But You are 100% correct in saying it would occur clinically faster than mesial root movement (especially in high angle patients)

[@essentialbiomechanics9381]

This is a possibility if you use the mechanics with a cantilever. But a flexible ligature in diagonal direction is not a perfect anchorage to avoid both vertical and horizontal movements.

[@anunaygupta95]

Is this design published in a journal?

[@essentialbiomechanics9381]

The design showed in this video was customized using a specific software for testing loop configurations. You can find more information on: Understanding orthodontic loop preactivation. Halazonetis DJ. Am J Orthod Dentofacial Orthop. 1998 Feb;113(2):237-41 Design and test orthodontic loops using your computer. Halazonetis DJ. Am J Orthod Dentofacial Orthop. 1997 Mar;111(3):346-8.

[@stevan_138]

What type of archwire do you use?

[@essentialbiomechanics9381]

TMA wire 17 x 25

[@stevan_138]

@@essentialbiomechanics9381 Ok.Tkank's

[@drvvij]

Will the TAD not unscrew?

[@Ta7rirShamali]

I was going to ask the same question, you preceded me my friend :)

[@maciejwarnecki9060]

It is best to use reverse-Thread screw in third quadrant as in this case (screwing in counterclockwise motion). This way the moment acting on the screw will even reinforce its position.

[@essentialbiomechanics9381]

@@maciejwarnecki9060 this is the appropriate answer. Tks for your contribution.

[@dralizahnarzt1118]

❤