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Aesthetics / Re: Opinions on my plan
« Last post by kavan on Today at 02:56:56 PM »CCW-r is based on the rotation of a TRIANGLE constructed from points/landmarks on the maxillary mandibular complex. The concept behind it is that when this triangle is ROTATED, the lower vertex of the triangle advances in a forward direction. So, if point A is ANS of maxilla, point B is PNS of maxilla and point C is the outermost chin point (pogonian), the rotation has it that point C is moved forward via the ROTATION and also that the rotation alters the linear path the maxilla and mandible can be advanced along. A rotation isn't a linear movement in itself but it changes the orientation of the linear paths moved/advanced along just like rotation of triangle ABC changes the orientation of the linear paths within the triangle.
Enclosed is a diagram of a rotated triangle.
Maxfax NOMENCLATURE has it that the term 'linear advancement' is reserved to describe forward advancement of the whole triangle with NO rotation of it. For example for point C to move forward, point A would also need to be moved forward and along the orientation of line/path AB. So, in both examples using a triangle as reference, advancement is always along a linear path. But the term 'linear advancement basically means forward displacement of the whole triangle along what ever inherent orientation line AB of it has. So, if point C of a triangle is to be advanced forward, point A also has to go along with the ride where as with the ROTATION of the triangle, point C gets a free ride and point A can stay where it is (when it's the rotation point).
After the TRIANGLE is ROTATED, in which case the lines that form it are re-oriented, advancement along the changed paths takes place. So, if point C was to be advanced 'a lot', point A would also need to be advanced but not as much as point A.
Now as to FEARS or concerns about displacements made to your Max-Md triangular complex, a fear or undue concern about point A of the triangle advancing 'too much' could result in an outcome of point C not being advanced enough. Conversely, a fear/concern about point C being advanced 'too much' could result in point A not being advanced enough. If the fear is both being advanced 'too much', it could result in under advancement.
The Max-Md triangular complex looks to be in good aesthetic balance. That is what the bony displacement model shows and also what the soft tissue displacement prediction shows. So, you need to think about it in terms of the MM TRIANGLE on which CCW along with the advancements that can go with it is based. Although the displacement proposal, visual thereof doesn't predict ahead of time whether you will like the outcome or not, it's what you have to base your decision on and more reliable than basing your decision on fears. Also, no one here, including my self can give you a better prediction of the outcome than the visual you were given was or predict whether or not you will like what you see in the mirror. So, if you want to make a decision based on fears of this or that extent of advancement being 'too much' or will 'look funny' or won't look as good as the prediction itself --what ever--you can do that if you want (on your own time) and ask the surgeon for LESS advancement based on those fears/concerns. But if you want to make a decision based on fear, you also need to consider 'what if' your decision requesting a change of plan is a faulty one
In closing, you are assuming the predicted outcome is erroneous or could be. There is NO absolute certainty that it is an exact prediction of an outcome, whether or not you will like it even if it is or whether or not you DO like it as it is depicted. IMO, it's an OPTIMAL outcome. But since your fears lead you down a path of 'what if' it is an erroneous prediction or you might not like it even if it's 99% predictive, then your choices resolve to no surgery at all in the event the prediction does not guarantee the outcome it shows or a choice of which direction you would rather err on; under or over advancement. As to 'what if' the prediction of the outcome is in error in some way, there is also the 'what if' your assumption that it is in error in some way is in error.
There is no ABSOLUTE CERTAINTY to be guaranteed here and NO BETTER predictions to be made here than the one you got already. It's inherently a decision made under uncertainty.
ETA: If the depiction doesn't show the upper lip angling outward and the teeth don't angle outward in the bone model, no assumption can be made that the teeth would angle outward with a smile given that the orientation of the teeth support the upper lip.
ETA: If the bone model SHOWS you both the jaw advancement and the rest of the scull with it, no assumption can be made that it's out of proportion with the rest of the scull.
Enclosed is a diagram of a rotated triangle.
Maxfax NOMENCLATURE has it that the term 'linear advancement' is reserved to describe forward advancement of the whole triangle with NO rotation of it. For example for point C to move forward, point A would also need to be moved forward and along the orientation of line/path AB. So, in both examples using a triangle as reference, advancement is always along a linear path. But the term 'linear advancement basically means forward displacement of the whole triangle along what ever inherent orientation line AB of it has. So, if point C of a triangle is to be advanced forward, point A also has to go along with the ride where as with the ROTATION of the triangle, point C gets a free ride and point A can stay where it is (when it's the rotation point).
After the TRIANGLE is ROTATED, in which case the lines that form it are re-oriented, advancement along the changed paths takes place. So, if point C was to be advanced 'a lot', point A would also need to be advanced but not as much as point A.
Now as to FEARS or concerns about displacements made to your Max-Md triangular complex, a fear or undue concern about point A of the triangle advancing 'too much' could result in an outcome of point C not being advanced enough. Conversely, a fear/concern about point C being advanced 'too much' could result in point A not being advanced enough. If the fear is both being advanced 'too much', it could result in under advancement.
The Max-Md triangular complex looks to be in good aesthetic balance. That is what the bony displacement model shows and also what the soft tissue displacement prediction shows. So, you need to think about it in terms of the MM TRIANGLE on which CCW along with the advancements that can go with it is based. Although the displacement proposal, visual thereof doesn't predict ahead of time whether you will like the outcome or not, it's what you have to base your decision on and more reliable than basing your decision on fears. Also, no one here, including my self can give you a better prediction of the outcome than the visual you were given was or predict whether or not you will like what you see in the mirror. So, if you want to make a decision based on fears of this or that extent of advancement being 'too much' or will 'look funny' or won't look as good as the prediction itself --what ever--you can do that if you want (on your own time) and ask the surgeon for LESS advancement based on those fears/concerns. But if you want to make a decision based on fear, you also need to consider 'what if' your decision requesting a change of plan is a faulty one
In closing, you are assuming the predicted outcome is erroneous or could be. There is NO absolute certainty that it is an exact prediction of an outcome, whether or not you will like it even if it is or whether or not you DO like it as it is depicted. IMO, it's an OPTIMAL outcome. But since your fears lead you down a path of 'what if' it is an erroneous prediction or you might not like it even if it's 99% predictive, then your choices resolve to no surgery at all in the event the prediction does not guarantee the outcome it shows or a choice of which direction you would rather err on; under or over advancement. As to 'what if' the prediction of the outcome is in error in some way, there is also the 'what if' your assumption that it is in error in some way is in error.
There is no ABSOLUTE CERTAINTY to be guaranteed here and NO BETTER predictions to be made here than the one you got already. It's inherently a decision made under uncertainty.
ETA: If the depiction doesn't show the upper lip angling outward and the teeth don't angle outward in the bone model, no assumption can be made that the teeth would angle outward with a smile given that the orientation of the teeth support the upper lip.
ETA: If the bone model SHOWS you both the jaw advancement and the rest of the scull with it, no assumption can be made that it's out of proportion with the rest of the scull.