Welcome to the Podiatry Arena forums

You are currently viewing our podiatry forum as a guest which gives you limited access to view all podiatry discussions and access our other features. By joining our free global community of Podiatrists and other interested foot health care professionals you will have access to post podiatry topics (answer and ask questions), communicate privately with other members, upload content, view attachments, receive a weekly email update of new discussions, access other special features. Registered users do not get displayed the advertisements in posted messages. Registration is fast, simple and absolutely free so please, join our global Podiatry community today!

  1. Everything that you are ever going to want to know about running shoes: Running Shoes Boot Camp Online, for taking it to the next level? See here for more.
    Dismiss Notice
  2. Have you considered the Critical Thinking and Skeptical Boot Camp, for taking it to the next level? See here for more.
    Dismiss Notice
  3. Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
    Dismiss Notice
Dismiss Notice
Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
Dismiss Notice
Have you liked us on Facebook to get our updates? Please do. Click here for our Facebook page.
Dismiss Notice
Do you get the weekly newsletter that Podiatry Arena sends out to update everybody? If not, click here to organise this.

Morton's extension

Discussion in 'General Issues and Discussion Forum' started by AaronKara, Nov 12, 2013.

  1. AaronKara

    AaronKara Member

    Members do not see these Ads. Sign Up.
    Hi there,

    Can someone please tell me when you would prescribe a Morton's extension for someone? What does it do?

    Many thanks
  2. Lab Guy

    Lab Guy Well-Known Member

    What have you learned so far from googling Morton's extension?

  3. AaronKara

    AaronKara Member

    Okay so I got you would use it for hallux rigidus.
    A Morton's extension is a: A distal extension beyond the 1st MTPJ to limit movement at the 1st MTPJ and to transfer load to IPJ of hallux.
    But if it's rigidus, there is already limit ROM, why would u use that other then pain relieve?
    Is it palliative and you would be supporting the rigid ness?
  4. blinda

    blinda MVP

    The aim is to reduce dorsiflexion moments of the hallux. That IS reducing pain when you have a dorsal osteophyte. It works, but I can`t wear FM shoes any more. If only I knew of a friendly pod surgeon who could fix it with non-palliative care.
  5. Lab Guy

    Lab Guy Well-Known Member

    Hallux rigidus is not life threatening and you are correct, the Morton's extension is palliative and would be supporting the rigidness.

    The terminology that I use is functional hallux limitus when there is a normal range of motion in OKC and Structural hallux limitus (SHL) when the ROM is 35 degrees or less in OKC. I use the term hallux rigidus when the joint has been fused from advanced arthritis. At this stage, there is no pain as there is no motion to inflame an osteochondral defect or dorsal osteophyte.

    In later stages of SHL, there will be pain on end range of motion. This is commonly caused by increased hallux dorsiflexion stiffness so that during propulsion, the dorsal aspect of the base of the proximal phalanx is compressing against the head of the first metatarsal head. This commonly leads to osteochondritis desicans located at the dorsal central portion of the met head and is a common source of pain.

    I will use a Morton's extension to terminate behind the IPJT to purposely decrease the available motion and decrease the compression as well as shearing across the osteochondral fragment. The extension can also help reduce the pain from a fractured dorsal osteophyte from preventing the base of the proximal phanlanx from constantly colliding into it during propulsion.

    I have done my share of surgeries for structural hallux ridgidus as Morton's extension do not always work but you always want to exhaust conservature measures. Its not life threatening.

  6. RobinP

    RobinP Well-Known Member


    Take a ruler and put it flat on a desk. It has no pivotting point.
    Take a pencil and put it under the ruler 10 cm from the end(or 2/3 of the way along the ruler)

    What happens?
  7. AaronKara

    AaronKara Member

    Thanks heaps guys!!!
    I get it now!
  8. Boots n all

    Boots n all Well-Known Member

    Hey Kara, careful the shoe that you put it in, it will need to have some form of rocker sole to replaced the mpj motion you have just blocked.

    As Robin was pointing out with his "pencil n ruler" analogy or were you just explaining how to make a quick catapult Robin ?
  9. Here is Morton's patent.

    Attached Files:

  10. Lab Guy

    Lab Guy Well-Known Member

    Simon, thanks for posting his patent. Interesting.


Share This Page