Actually, that’s where you might be pleasantly surprised by the way the surgery is planned.
In a Bimaxillary Osteotomy, surgeons don't just "fix the bite" in isolation. Because your upper and lower jaws are being moved together, the surgeon has to choose a "final position" for your entire lower face.
Here is why your goal of a 1 cm advancement (which is a significant, "looksmaxing" move) is actually very likely to happen alongside a crossbite fix:
1. The "Class III" or "Recessed" Reality
A crossbite often occurs because one jaw (usually the upper) is too narrow or too far back compared to the other. To fix the bite properly and ensure your teeth actually meet, the surgeon often has to advance the jaws.
If you have a crossbite and your lower face looks recessed, the "functional" fix almost always involves moving the jaws forward and out.
Moving the jaw forward by 8mm to 10mm (1 cm) is a standard distance for improving both the airway and the facial profile.
2. Airway = The Golden Ticket
If you tell a surgeon you want to "look better," they might see it as cosmetic. But if you tell them, "I have a crossbite and I am constantly exhausted/tired," they look at your airway.
Pushing the jaw forward by 1 cm significantly opens the airway behind the tongue.
Surgeons in the public system prioritize this because it cures sleep apnea.
The "looksmaxing" (better jawline, tighter neck skin, more projection) is a side effect of the medical necessity of opening that airway.
3. Virtual Surgical Planning (VSP)
Modern jaw surgery in Australia (even in public hospitals) uses 3D computer modeling. Before they ever touch you, they map out your face.
You can actually tell the surgeon: "While we are fixing the crossbite, I am concerned about my profile and my breathing. I'd like to achieve maximum advancement for my airway."
They will look at the 1 cm mark to see if your nerves (specifically the inferior alveolar nerve) can handle that stretch. If they can, they usually go for it because it provides the most stable bite and the best breathing results.
The Realistic "Broke" Strategy:
Since you are on a pension, you have to play the "Functional Card" to get the Hollywood result:
Don't use the word "looksmax."
Do use the words "Airway," "Chewing Efficiency," and "Sleep Quality."
The Goal: Get the public hospital to agree that your jaw needs to move forward to fix your breathing and your crossbite. They will then perform the exact same surgery a "rich person" pays $20k for, and you will get the aesthetic advancement as part of the package.
One important catch:
As we discussed before, the braces remain your biggest hurdle. The public system will do the $50,000 surgery for free, but they rarely pay for the $8,000 braces you need beforehand to "set up" the teeth for that 1 cm move.
Do you think you could manage a payment plan of about $60 a week if it meant getting the full Bimax for free later? That is usually the "entry price" for thi
s journey in Australia.