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Some questions about proportions

L
LG1816
Member
Posts: 276
Joined: Mar 2022
Posted on Jun 3, 2023, 12:18 pm
#1
Hi,
I’ve seen a few different ratios for tibia to femur batted around here, but I can’t really find any concrete information on when it is your proportions start to look strange.

I’ll be doing Tibias. Does anyone have any links or formulas that are useful?

Thanks!
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D
DanishViking
Member
Posts: 146
Joined: Jan 2023
Posted on Jun 3, 2023, 1:11 pm
#2
Doing tibia only is kind of stupid in my opinion. Why? Well it heals slower, has a higher complication rate, more likely to have permanant problems with joins / early arthiris, breaking 2 bones instead of 1, and most importantly you can gain much less height safetly (5 cm MAX vs 8 cm MAX). And for the love of god, don't do LON unless you want to the big risk of ostemylisis. Sorry for my gramma right now busy.

https://pubmed.ncbi.nlm.nih.gov/26398436/

see 11:50 - 14:40
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M
Medium Drink Of Water
Verified Patient
Posts: 325
Joined: Oct 2013
Posted on Jun 3, 2023, 5:04 pm
#3
Overdoing tibias will make you look like a gazelle, overdoing femurs will make you look like a caterpillar.

Limit yourself to a tibia:femur ratio of 1 (you're probably at about 0.8 now).  Even that is kind of pushing it but it's still acceptable as long as you wear shorter shirts that don't cover much of your hips/thighs.  Looks better than wearing a big baggy shirt that could almost be a dress anyway. Some questions about proportions

And don't take this paranoid guy too seriously.  I did 7.5 cm (for the 1 ratio) on tibias with LON and never even got a superficial pinsite infection.  How you take care of yourself makes a big difference; this is not a random gamble.
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K
KrP1
Member
Posts: 465
Joined: Mar 2014
Posted on Jun 3, 2023, 9:33 pm
#4
most people could handle 7cm in one segment without looking strange, specially in femurs. don't go over that and it will be ok.
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L
LG1816
Member
Posts: 219
Joined: Mar 2022
Posted on Jun 4, 2023, 11:09 am
#5
Quote from: Medium Drink Of Water on June 03, 2023, 05:04:07 PMOverdoing tibias will make you look like a gazelle, overdoing femurs will make you look like a caterpillar.

Limit yourself to a tibia:femur ratio of 1 (you're probably at about 0.8 now).  Even that is kind of pushing it but it's still acceptable as long as you wear shorter shirts that don't cover much of your hips/thighs.  Looks better than wearing a big baggy shirt that could almost be a dress anyway. Some questions about proportions

And don't take this paranoid guy too seriously.  I did 7.5 cm (for the 1 ratio) on tibias with LON and never even got a superficial pinsite infection.  How you take care of yourself makes a big difference; this is not a random gamble.

Cheers for the advice! I am indeed 0.8 right now at 5’8.5 evening height. What about sitting height? Is that something to factor into the equation?
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L
LG1816
Member
Posts: 323
Joined: Mar 2022
Posted on Jun 4, 2023, 11:10 am
#6
Quote from: KrP1 on June 03, 2023, 09:33:34 PMmost people could handle 7cm in one segment without looking strange, specially in femurs. don't go over that and it will be ok.

Understood, thanks!
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L
LG1816
Member
Posts: 153
Joined: Mar 2022
Posted on Jun 4, 2023, 11:13 am
#7
Quote from: DanishViking on June 03, 2023, 01:11:30 PMDoing tibia only is kind of stupid in my opinion. Why? Well it heals slower, has a higher complication rate, more likely to have permanant problems with joins / early arthiris, breaking 2 bones instead of 1, and most importantly you can gain much less height safetly (5 cm MAX vs 8 cm MAX). And for the love of god, don't do LON unless you want to the big risk of ostemylisis. Sorry for my gramma right now busy.

https://pubmed.ncbi.nlm.nih.gov/26398436/

see 11:50 - 14:40

Thanks for the post, but that paper doesn’t really tell us a lot. What about the ones that show arthritis as a risk for femoral lengthening? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8231406/

I’d be doing pure externals anyway, but Giotikas himself told me that LON was a safe proceedure.
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M
Medium Drink Of Water
Verified Patient
Posts: 273
Joined: Oct 2013
Posted on Jun 4, 2023, 2:56 pm
#8
Quote from: LG1816 on June 04, 2023, 11:13:16 AMI’d be doing pure externals anyway, but Giotikas himself told me that LON was a safe proceedure.

A much better choice than LON.  It was my first choice but for a couple of reasons beyond my control, that didn't end up happening.
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O
oeioei2
Member
Posts: 231
Joined: Mar 2023
Posted on Jun 4, 2023, 2:59 pm
#9
Quote from: Medium Drink Of Water on June 03, 2023, 05:04:07 PMOverdoing tibias will make you look like a gazelle, overdoing femurs will make you look like a caterpillar.

Limit yourself to a tibia:femur ratio of 1 (you're probably at about 0.8 now).  Even that is kind of pushing it but it's still acceptable as long as you wear shorter shirts that don't cover much of your hips/thighs.  Looks better than wearing a big baggy shirt that could almost be a dress anyway. Some questions about proportions

And don't take this paranoid guy too seriously.  I did 7.5 cm (for the 1 ratio) on tibias with LON and never even got a superficial pinsite infection.  How you take care of yourself makes a big difference; this is not a random gamble.

If someone has perfect ratio of around 0.80-0.82. Wouldnt a femur lengthening of 5 cm ruin it and put it below 0.80? Is it not better to do a tibia lengthening in that case and get a ratio of around 0.90?

Because for me currently I would guess I have around 0.80 ratio (havent done xrays yet) but I do care about the aesthetics aswell and I read that long tibias > long femurs from aesthetic view. What do you think?

I dont wanna end up looking strange
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M
Medium Drink Of Water
Verified Patient
Posts: 172
Joined: Oct 2013
Posted on Jun 4, 2023, 3:42 pm
#10
Quote from: LG1816 on June 04, 2023, 11:09:58 AMWhat about sitting height? Is that something to factor into the equation?

I would only pay attention to sitting height if I were doing more than one LL.
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