Quote from: Adriano on January 13, 2014, 10:08:47 AM1) if u cut a piece of timber with a saw and put it back together, the 2 parts put together are shorter than the original length of the uncut piece of timber.
2) our leg bones ( especially) femurs are not 100% vertical.
this is why amount lengthened is always greater than actual height gained.
Quote from: Medium Drink Of Water on January 12, 2014, 07:25:25 PMWhy are you convinced of something that doesn't make sense, and for which no evidence exists?In my opnion, it compresses, however less with a nail inside. But after the first months it can really compress if you put a lot of streess on it. Remember the bone is not steel, and on the first months after LL, density may not be the same. I remember Dr. Guichet saying something about this too. That is why I never run or worked out my legs before 1 year after LL.
The bone will either stay where it is or break. It doesn't shrink or slide or compress or anything like that.
Quote from: Adriano on January 13, 2014, 10:08:47 AM1) if u cut a piece of timber with a saw and put it back together, the 2 parts put together are shorter than the original length of the uncut piece of timber.
2) our leg bones ( especially) femurs are not 100% vertical.
this is why amount lengthened is always greater than actual height gained.
Quote from: Kilokahn on January 13, 2014, 07:10:02 PMNot entirely sure this has to do with the topic at hand, but this is what Dr. Parihar wrote about compression during the consolidation phase of lengthening.
At the end of distraction, Ilizarov recommends "training the regenerate'. Simply put, this involves overlengthening the limb by 7 to 10 mm and then compressing this back to the proper length in a gradual fashion. This ensures a larger cross sectional area of regenerate to participate in the consolidation. The fixator has to be neutralized to ensure that the weight bearing stresses will be transferred to the newly formed osseous tissue. Neutralization is achieved by reversing (compressing) the rings at a rate of 0.25 mm an alternate days till the rings no longer move towards each other. At this point there is no more tension in the system, and most of the weight bearing forces are transmitted through the bone. This procedure may render the wires relatively lax, and they may need to be tensioned if the patient complains of pain or instability can be demonstrated. At this time a monthly follow up will usually suffice. During the consolidation phase the risk of complications is reduced markedly, and the patient's functional abilities increase. Movement and ambulation are encouraged to ensure a speedy consolidation of the regenerate.
Was thinking that if you overlengthen the limb by 7 to 10 mm as he says, then when you compress gradually until you hit the intended length, you wouldn't have any more room for compression afterward. Just an idea. Might be looking at this the wrong way.
Quote from: Wannabegiant on January 13, 2014, 08:07:50 PMWow so i would basically need to lengthen 5 cm to get 4 cm? i wonder if that is taken into account since Mirzoyans price is set per cm.
This is very confusing, on one hand i would not want to lengthen more than necessary because of the increased time spent and longer recovery. But still i would hate to pay for and lengthen 4 cms and end up with 3 cms height gain in the end because of compression.
I hope the doctor is aware of all this and has a solution. i wish the external fixators where more reliable.
Quote from: Sweden on January 13, 2014, 08:15:53 PMEven my Dr told me to do 7,5cm if I wanted 7cm.
If you have pin bending you have to do more than desired length.
I would advice you to do 5,3 or something like that. You will probably have pin bending bc you're going to stand up a lot. I didn't do that and I suffer like hell bc of it.
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