How is the midline moved?

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Leebie3
Posts: 277
Joined: Thu Apr 18, 2013 6:44 am
Location: Cairns, Far North Queensland, Australia

How is the midline moved?

#1 Post by Leebie3 »

How do they fix a misaligned midline?
Image

38yr old Mum to 3 (2 teens and a preppie) living in paradise with her man. BSSO surgery approx late April 2014!

Lalaloo
Posts: 39
Joined: Sat Nov 02, 2013 11:08 pm

Re: How is the midline moved?

#2 Post by Lalaloo »

In my case with IPR and powerchains on the side that has to be moved...

scraggy
Posts: 120
Joined: Fri Sep 13, 2013 11:38 am
Location: England

Re: How is the midline moved?

#3 Post by scraggy »

Hi, leebie3, they will match your midline in surgery.

sirwired
Posts: 2104
Joined: Thu Oct 30, 2008 10:05 am

Re: How is the midline moved?

#4 Post by sirwired »

Without surgery, they'll use elastics of some sort anchored to either a tooth or TAD (depending on which teeth need moving.) The real trick with a midline shift is that since every action has an equal and opposite reaction, the tooth acting as the "anchor" generally much larger, and even then, can only do so much; some orthodontists refer to this as the "anchorage budget", as there's only so much movement that can be anchored by any given tooth. (This problem is one of the reasons TAD's exist; since they are screwed into to fixed bone (vs. the special bone your teeth use), they don't move.)

With surgery, that's the surgeon's job. That said, my surgery actually messed up my midline; for a centered midline I would have needed upper and lower surgery. It was my call, and my call was to only have upper done, and the movements that required called for an off-center midline, as my lower jaw is significantly NOT centered.

Leebie3
Posts: 277
Joined: Thu Apr 18, 2013 6:44 am
Location: Cairns, Far North Queensland, Australia

Re: How is the midline moved?

#5 Post by Leebie3 »

Thanks guys.. I'm only having lower surgery now so upper midline can't be done in surgery (if only!) ..
Image

38yr old Mum to 3 (2 teens and a preppie) living in paradise with her man. BSSO surgery approx late April 2014!

cs2thecox
Posts: 178
Joined: Fri Nov 08, 2013 2:39 am
Location: London, UK

Re: How is the midline moved?

#6 Post by cs2thecox »

My upper midline is showing great improvements without power chains or anything so far!
Although I do have double ligs on (wire plus normal rubber) so I don't know if that changes anything. Thank heaves I have linguals or I'd look a bit daft with double ligs on the outside - they're pretty bulky.

I do have an implant on one side though, and if we need more space to get the midline sorted that we can just shave down the crown a bit. I guess I'm lucky that I have a variable sized gap on the side I need one!
(Or maybe that's why my teeth were disappearing off the other side - we don't even know why it was happening yet.)

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