i remember femur is not upright that the lengthening amount is not 100% going to your height, and i heard there's a formula to calculate this for your final height expectation. Does anyone know about that estimator?
Take a look at the video HJ did
tldr;
It doesn't generally matter, the difference will only be about .2cm - .4cm if you lengthen 8cm total. Don't worry about it.
thanks men
The difference is about 10%. For instance you lose about 0,8cm for 8cm lengthening.
Quote from: Body Builder on May 27, 2023, 09:34:48 PMThe difference is about 10%. For instance you lose about 0,8cm for 8cm lengthening.
you sure? i searched and most say it's only less than 0.5cm
when you stand up straight optimally and recovered from duck ass and stuff then 0. Think about it, when someone is 6 feet when they are optimally straight and legs straight when measuring, they're not actually 6 feet when their legs are shoulder length apart, but they're still a 6 feet person. so who cares. You are exactly 8cm taller if that is what you lengthen.
average femur length is around 46 cm and the angle between the anatomical and mechanical axis or Q-angle, is 13-15 degrees in males
So: {(y + x)(cos(14))}-{(y)(cos(14))}= ¨actual femur lengthening¨ or anatomical axis length gain
where y=femur initial length (cm)
x=Limb Lengthening (cm)
{(46cm + 8 cm)(cos(14))}-{(46cm)(cos(14))}=¨actual femur lengthening¨ = 7.76 cm
or -.24 of less of actual height gain
PD:This would be on avg
about 0.1 cm is gained with the osteotomy
and maybe a little more depending on the technique of the surgeon when inserting the nail
So the actual lengthening and height gain are a very close
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