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[ShortandStubborn]

Well, I've had this theory. The precise 2 as you all may know supports upto 75 lbs but what happens when you lengthen both Tibia and Femur with Precise 2 at the same time? Would the weight support increase to 150 lbs i.e. full weight bearing?

[ShortandStubborn]

Well, one doesn't necessarily needs to engage in Pre-op walking - just the basic walking would do just fine. You'd at least be able to depend on yourself for doing basic chores while lengthening. And once you've lengthened, you could get on with your life pre-op. Regaining athletic ability wouldn't be so worrisome once you walk a mile or so in day unaided. That'd be like a dream come true.
Quadrilateral Lengthening itself is still a very dangerous idea though.

[Penguinn]

I personally wouldn't dare lengthen tibia and femur at the same time, no matter the method.

[Ozymandias]

Well, I've had this theory. The precise 2 as you all may know supports upto 75 lbs but what happens when you lengthen both Tibia and Femur with Precise 2 at the same time? Would the weight support increase to 150 lbs i.e. full weight bearing?

Uh... no, that's not how physics work. I mean, with quadrilateral you are putting one nail "on top" of the other, and you are not increasing the compression strength of the system. The only way to double the strength would be putting 2 nails on the same segment, which is anatomically impossible. And even with that, the weight-bearing capacity is not limited by the nail itself (I'm sure it can resist more than 200 lbs) but by the small screws fixing it to the bone. I don't know if there is a way to increase the diameter of these screws so they can support more weight.

[Taller]

Putting more screws in would increase safe weight bearing limits since the screws are the weakest lnk. I wonder why nobody does that since the same incision could be used to put in many more screws side by side and increase the weight bearing abillity of the nails. Everyone knows the screws are the weakest link.

I'm sure all these improvements will happen in due time if CLL becomes more mainstream. I dont know if that will happen though.

[ShortandStubborn]

Uh... no, that's not how physics work. I mean, with quadrilateral you are putting one nail "on top" of the other, and you are not increasing the compression strength of the system. The only way to double the strength would be putting 2 nails on the same segment, which is anatomically impossible. And even with that, the weight-bearing capacity is not limited by the nail itself (I'm sure it can resist more than 200 lbs) but by the small screws fixing it to the bone. I don't know if there is a way to increase the diameter of these screws so they can support more weight.

So weight-bearing limit stays the same irrespective of the number of nails? Are you sure?
Frankly, I don't know how Physics work but I fail to see how 2 nails wouldn't effect the weight bearing at all.
Sure, it's understandable that weight support may not double but remain 75 lbs doesn't sit well with me.
Perhaps someone could elaborate further.

[Ozymandias]

So weight-bearing limit stays the same irrespective of the number of nails? Are you sure?
Frankly, I don't know how Physics work but I fail to see how 2 nails wouldn't effect the weight bearing at all.
Sure, it's understandable that weight support may not double but remain 75 lbs doesn't sit well with me.
Perhaps someone could elaborate further.

I mean that if you have a precice (or any other nail) in your tibia, adding another one in your femur will not increase the weight bearing (not sure if this is what you were talking about in your first post). It is like if you put a pillar on top of another pillar, it would not increase the strenght at all.

[Medium Drink Of Water]

Are the screws really the weakest link in the system, though?  The fully weight-bearing nails use the same level of screw technology.  I don't think it's the screws.

So weight-bearing limit stays the same irrespective of the number of nails? Are you sure?
Frankly, I don't know how Physics work but I fail to see how 2 nails wouldn't effect the weight bearing at all.
Sure, it's understandable that weight support may not double but remain 75 lbs doesn't sit well with me.
Perhaps someone could elaborate further.

The nails are only holding the gaps in the bone apart.  The nails aren't double-teaming any one gap in quadrilateral lengthening.  It's still one nail per gap.

[ShortandStubborn]

I mean that if you have a precice (or any other nail) in your tibia, adding another one in your femur will not increase the weight bearing (not sure if this is what you were talking about in your first post). It is like if you put a pillar on top of another pillar, it would not increase the strenght at all.

Hmmm...Interesting.

The fully weight-bearing nails use the same level of screw technology. 

And those nails would be BetzBone and G-nail, right? If so, I'll weigh no more than 130 lbs while lengthening. Do you think I could
walk unaided within first month of surgery considering my weight?

I'd really be interested in Dr. Guichet, problem is people usually complain clicks in Femur are too painful. I remember Apotheosis claiming to have woken up whole floor with his screams when he first began clicking in Femur. Now that's something I don't wanna go through. And the recovery apparently is quicker with Precise due to it's distraction method. Well, that I could trade for mobility throughout but the pain's keeping me from considering Gnail. Your thoughts?

[Medium Drink Of Water]

If you're that light you'd be okay weight-bearing with precise.  It's 75lbs. per nail, not total.  You'd have to use a walker and swing your legs forward instead of putting all your weight on one leg like you do when walking normally, but it would be doable.

[Sweden]

WTF??
You want to do it AGAIN??