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Aesthetics / Re: Comparison of two bimax simulations
« Last post by VincentGT on April 27, 2025, 04:08:01 AM »Sorry, I can't keep track of which plan is which when plans are not all together on the same page and described.
I'm just saying that I think your nose would also benefit by some modest maxillary advancement. You have a slightly convex (slightly) and slightly downward rotation of the tip and the dorsum of the nose stands to get somewhat straightened out and the tip somewhat de-rotated with maxillary advancement. That is to say, in PROFILE perspective, your nose contour is consistent with what you say you have and what other doctors said you had which was somewhat of a recessive maxilla. Also, since you now say that your nose is NOT wide at the alar base, all that is CONSISTANT with my saying I think your nose would veer in direction of benefit vs detriment--and YES, an alar cinch can be used to mitigate excess unwanted width. If you had a conCAVE nose (a dip in the dorsum) and a turned up tip, that's the type of nose that can experience un aesthetic sequella with maxillary advancement. OK.
CCW-r is associated with getting a larger lower jaw advancement than you would otherwise get without CCW-r assuming the CCW-r in question is a posterior downgraft. If the rotation point is at the ANS, that type of rotation doesn't affect the upper tooth show. The type of CCW-r that can affect the upper tooth show in the sense that it REDUCES a gummy smile is anterior impaction; a slice removed from the anterior maxilla. However, what can increase the tooth show (or gum show) is the maxillary advancement. So, if you want more of a lower jaw advancement than you would get WITHOUT CCW-r posterior downgraft than you would have to weight that in with the possible trade-off of more gum show with the maxillary advancement. So, I would say, the maxillary advancement would benefit your nose profile contour and the cut to do it would allow for CCW rotation to get a good lower jaw advancement. So, you would have to decide if the 2 possible 'pay offs' are worth the 1 possible 'trade-off'.
The upper lip can go 'both ways'. For example if someone gets a LARGE maxillary advancement, the philtral upper lip area can kind of get 'squeezed on' and could look thinner or it could get pushed out too much along an unfavorable native orientation of the ANS-PNS plane (maxillary plane) and start looking conVEX. The other way is that since the upper lip is being brought more forward in the FORGROUND of the picture plane (or the mirror), the upper lip can look more prominent. But to the best of my knowledge, we are talking about a MODEST maxillary advancement that doesn't come with the same boat load of worries that some LARGE ones can come with. So, you would need to ask your surgeon as to any 'need' for V-Y sutures.
Here, I am just going with the flow of your DESIRE to have the maxillary advancement as part of the double jaw surgery and I can buttress some of the reasons behind your desire to have the maxillary advancement. But now you have all these concerns/worries about having that?
Again, I can tell you how things work and you can apply the concepts to weigh the pay offs vs. the trade-offs. I think there are more pay-offs than trade-offs (gains vs. losses) with the maxilla included in the surgery. Best I can do is what I have done via explaining why I think that is so. But I'm not going to 'sell you on' getting the maxillary aspect of the surgery, the very surgery you WANTED to have, gave reason to have which were reasonable to want soon after I validate some of the reasons to have it and then you express a lot of concerns about the very thing you wanted to have.
If you are looking for CERTAINTY, then certainly there is no chance of ANY unfavorable nose changes, no chance of ANY unfavorable changes to tooth/gum show, philtral changes etc. with NO surgery to the maxilla. But then again there's no chance of any favorable changes either with no surgery to the maxilla.
Thanks, Kavan.
I see what you are saying. The part marked in bold makes sense, but I'm not too sure that I draw the right conclusions from the given simulation.
In this simulation: I can tell that both jaws are advanced and given the slight rise of the mandible there should be some rotation, right? It's hard to tell though whether this is through an interior impaction or a posterior downgraft? The rotation seems modest, but this is likely desirable given that the degree of the gonial angles is already good and the fact that we are talking about only a slight maxilla movement (apparently 3mm). Teeth show doesn't need to change (much) so a modest move makes sense. I did get a few measurements of this simulation by the way: click here.
I think and hope that you are right that the impact of perceived philtrum length will be negligible because of the modest maxilla movement.
Do you think it's problematic that the upper and lower lip don't really line up in the profile view of the simulation? I know lips are notoriously difficult to simulate though.