What's the safe limit for femur lengthening?

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Quote from: Highest on September 24, 2020, 11:46:20 PMThen why do you keep saying limit of 5cm for tibia then going to say 15% is safe?

Because 5cm is a good generalization. People don't know their tibia lengths without an x-ray, so 15% is meaningless info. Both are good estimations. 5cm is for convenience, for most people it's a good guideline. If you have a 33cm tibia (if you're asian 168cm male, you have similar) 15% of that is 5cm. If you're like 6'3 and african descent, you can probably get away with 7cm tibia lengthening and still be within 15%.

The point is that both are good metrics, I say 5cm because that's what Paley saids. In many peoples case, 5cm is a good general estimate for the 15% metric.

I'm not a doctor anyways. The safe limit really is just the point where you don't overstretch your Achilles. Rozbruch saids 4cm, Paley saids 5cm, mahboubian saids 6.5cm, Dr. Xia saids 10cm+, sarin saids infinity, the best answer is the less the better, 5-6cm max wud be a good estimate for 95% of people.

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Does anyone know the approximate time it takes to consolidate at each of these stages? I read somewhere that it's 2 months for every centimeter to make sure that the bone is fully consolidated and the nail is ready for removal. Is this true? So for 5cm it would take about 2 months distraction, and 10 months consolidation.

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Quote from: brondo on September 25, 2020, 12:13:13 AMDoes anyone know the approximate time it takes to consolidate at each of these stages? I read somewhere that it's 2 months for every centimeter to make sure that the bone is fully consolidated and the nail is ready for removal. Is this true? So for 5cm it would take about 2 months distraction, and 10 months consolidation.

1.5 to 2 months for every cm, total, which already includes distraction. So 5cm would be anywhere from 7.5 months to 10 months total, starting from the osteotomy. Not 10+5= 15 months

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Quote from: ghkid2019 on September 25, 2020, 12:16:33 AM1.5 to 2 months for every cm, total, which already includes distraction. So 5cm would be anywhere from 7.5 months to 10 months total, starting from the osteotomy. Not 10+5= 15 months

Thanks, and at this point would you have your athleticism back, before or after (running, sports, lifting weights, etc.)?

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Quote from: ghkid2019 on September 25, 2020, 12:12:20 AMsarin saids infinity,

holy Fugg LMAO

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Quote from: brondo on September 25, 2020, 01:25:57 AMThanks, and at this point would you have your athleticism back, before or after (running, sports, lifting weights, etc.)?

assuming your religous with your rehab. most of it should come back quckly as soon as you stop lengthening.
once the nails are taken out then youll really start to feelgood
so lets say around 13 months from the osteotomy ( assuming no complications and nail removal at 12 months)

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Quote from: wannabeidol on September 25, 2020, 02:19:19 AMassuming your religous with your rehab. most of it should come back quckly as soon as you stop lengthening.
once the nails are taken out then youll really start to feelgood
so lets say around 13 months from the osteotomy ( assuming no complications and nail removal at 12 months)

Thanks

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Anyone know what is the average femur length for a 5'7 male? I'm trying to get an estimate of how long my femur bone is, I don't really know how to measure it.

Ideally I want to do 5 cm femur to get to 5'9 sometime in the future. Wondering what % that would be. Mainly concerned with soft tissues

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Quote from: ghkid2019 on September 25, 2020, 12:12:20 AMBecause 5cm is a good generalization. People don't know their tibia lengths without an x-ray, so 15% is meaningless info. Both are good estimations. 5cm is for convenience, for most people it's a good guideline. If you have a 33cm tibia (if you're asian 168cm male, you have similar) 15% of that is 5cm. If you're like 6'3 and african descent, you can probably get away with 7cm tibia lengthening and still be within 15%.

I agree, it becomes an echo chamber in here when you have posters who repeatedly say "NOT 1mm OVER 5CM!!!!!!". 15% makes way more sense as it factors in different body types. The example you gave of the asian vs the african limb lengths made me think of how alot of people could be over lengthening their femurs and going way past 15%.

An individual would want an original femur length of around 53cm if they wanted to safely stick to 15% lengthening. This will be very unpopular to say but I imagine many here are over lengthening their femurs by going to max out at 8cm when they are very short to start with. Much like the big tibia lengthening of the past, RGkey anyone? Those who use "BUT DA NAIL GOES TO 8CM!?!?" to determine their femur amount is unwise in my opinion. Paley was even asked if he wanted the Stryde nail to go longer and he said NO as he knew LLers would take it to the maximum amount. Just because it goes to 8 doesn't mean everyone should especially the very short, this surgery is way too individual.

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Quote from: MakeMeTallAF on September 25, 2020, 04:56:54 AMAnyone know what is the average femur length for a 5'7 male? I'm trying to get an estimate of how long my femur bone is, I don't really know how to measure it.

Ideally I want to do 5 cm femur to get to 5'9 sometime in the future. Wondering what % that would be. Mainly concerned with soft tissues

Stopped being concerned about soft tissues and be more concerned with the fact that you're breaking your legs. Your soft tissue is gonna stretch either way, and it will take sometime but new tissue cells will grow. You r worrying about the wrong problem. Ur not fking doing 1.5mm or 2mm. U is doing the normal distraction rate that has been done for 40 fkin years. Just stop it.

And 5cm will be somewhere around 11% to 14% for your height based on my guestimate.