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Forces Required for Orthodontic Tooth Movements

April 28, 2013 by Dr. Varun Pandula 9 Comments

Orthodontic tooth movements are of various types depending on the amount of force and time duration the force is applied for. So for getting the correct type of tooth movement we need to maintain required amount of force.

Bodily Movement: This is the most desirable type of tooth movement in Orthodontic treatment. Both the crown and root move in the same direction either labially or lingually the same amount of distance.

Force Required for Bodily Tooth Movement: 100-150 grams

Tipping Movement: It is the simplest form of Tooth Movement where greater movement of the crown is seen compared to that of Root. Tipping tooth movement is of two types – Controlled Tipping and Uncontrolled Tipping

  • Force Required for Tipping Tooth Movement: 50 to 75 grams

Intrusion: It is defined as the axial movement of the tooth along the long axis towards the apex of the root. It is the type of tooth movement which requires least amount of force.

  • Force Required for Intrusion Tooth Movement:  15-25 grams

Extrusion: It is the Axial movement of tooth along the long axis towards the Coronal part of Tooth.

  • Force Required for Extrusion Tooth Movement: 50-75 grams

Forces required for Bodily Tooth Movement

Torquing: It is the labio-lingual movement of root compared to the Tooth.

  • Force Required for Torquing Tooth Movement: 75-125 grams

Uprighting: It the type of tooth movement which is used to correct either mesially or distally tilted tooth.

  • Force required for Uprighting tooth Movement: 75-125 grams

Rotation: It is the defined as the spinning of tooth along its own long axis which can be achieved by applying a couple of forces together where one force gets nullified and only one movement exists which causes rotation.

  • Force Required for Rotation Tooth Movement: 50-75 grams

For treating any patient with malocclusion multiple forces need to be exerted on teeth to get the end result of the desired occlusion. So keeping all the types of tooth movements and the amount of force exerted by each type of tooth movement the duration of application of each force varies accordingly. For example in cases of Anterior Overjet with deep bite, the forces required as Tipping movement and Intrusion which need to be exerted based on the tooth movement achieved.

Comments

  1. manwendra pratap says

    May 20, 2017 at 12:23 am

    i m 28 years old and have 0ne bottom 06 no. extracted 15 years ago due to which there is a tipping movement of 7 no.
    i want to correct thee tipping movement and move 7 and 8 along body line to create a space for implant.

    MP Singh

  2. Varun says

    July 4, 2017 at 2:50 pm

    For getting tooth movement of the Molars, Orthodontic treatment is the only option. If the tipping movement is not excessive removable appliances can be used, in case of severe tipping fixed movement is compulsory.

  3. Bill Northway says

    January 1, 2018 at 11:40 pm

    Varun:
    Your information was very helpful. Can you give me references for your information on forces?
    Thank you.

  4. Anila Bej says

    November 25, 2018 at 5:47 am

    Hi Varun, I had a question about molar movements. I am a student hoping to pursue orthodontics.
    In the past I had braces which required me to have rapid palatal expanders.
    This changed my dental arch from a rectangle to a circle. Mostly because my premolars and molars were expanded out.
    I wanted to know if its possible to push them back in. If so, what would be the force needed? Is it harder to push in than out?
    Thanks

  5. Varun says

    November 25, 2018 at 9:04 am

    For Palatal or inward movement of molars, you require mini or micro implants in the palatal area and use of any appliance or elastics to bring in the Molars.
    Yes, it is a bit difficult to move the molars inwards or palatally as compared to bucally, as the buccal bone is thin in comparison to the palatal bone which is thicker.

  6. Priya says

    February 25, 2019 at 5:46 am

    Is tipping movement alone sufficient for orthodontic treatment for slight protrusion or a combination of tipping and bodily movement essential? There are no crooked or crowded teeth

  7. Varun says

    February 28, 2019 at 5:21 am

    It depends on the amount of inclination of the teeth based on your jaw bone. If there is only proclination then only tipping movement will be sufficient. In case there is a spacing between the teeth which cannot be closed using only tipping movements then a combination of tipping + bodily movement is required.

  8. Amin says

    December 29, 2021 at 12:26 am

    How do you prevent uncontrolled tipping so that controlled tipping occurs?

  9. Varun says

    January 2, 2022 at 1:16 pm

    ¹It all depends on the position of the Bracket on surface of the tooth surface and also the shape of the wire being used.

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Varun Pandula

Varun Pandula

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