A new article came up in 2016 and it is a case study of a 19 year old male that goes through bone anchored palatal expansion. The technique is called MARPE (microimplant assisted rapid palatal expansion) and although it requires a surgical procedure to anchor an expander to the palate, it does not require an osteotomy (surgically splitting the maxilla at the mid-palatal suture).
This article is interesting because it completely ignores the dogma that bony change is only possible in children. It even includes a table to of recommended expansion rate based on the age of the patient. Note that this tables applies even to adults over 30 years old.
This is further proof that maxilla expansion and cheekbone widening is possible in adults
I have made a big upgrade to my facepulling headgear over the past few months. The frame of the device now rests on my chest and shoulders, allowing me to load more force on my maxilla. I have built this new frame using a medical neck brace to which I added metal poles. This is inspired from The Crane but it is a better design for a fraction of the cost.
My previous design looked like this:
My new headgear looks like this:
The forces applied on the maxilla are shown in red:
This is used with the same intraoral appliance as before:
I can sleep a full night with 500g of forward force and 500g of upwards force on my maxilla. When I raise this to 1000g forward and 1000g upwards, my palate becomes sore and I have to remove the headgear. I am working on making the intraoral appliance more comfortable so that I can apply higher forces. The most important design aspect of this appliance is that all of the load is applied on the maxilla, with zero teeth contact. This is important because the teeth can easily be displaced if forces are applied on them. We want to displace the maxilla while leaving the teeth untouched.
The facepulling headgear is only half of the battle. To achieve maxillary protraction in an adult, you need to develop excellent tongue posture and chewing habits. This is done by chewing hard gum regularly and practising tongue posture on a full-time basis.
We know that maxillary displacement is possible in adults, as Dr. Won Moon has been doing non-surgical palatal expansion on adults on a regular basis. Here is one of his results on a 30+ years old patient:
There is an interesting paper that shows the effect of a reverse-pull headgear on a 20-year old female. In these kind of experiments, the method used to to protracting the maxilla is very important and can be the difference between a successful case and a failure.
Usually, facemasks are only used on growing children and attempt to change the direction of growth. As adults, we do not have growth on our side so we have to stimulate bone movement with high forces and long wear times.
This 20-year old woman wore a reverse-pull facemask attached to her braces for 20 hours a day during 4-months. One of her main concerns were her underdeveloped cheekbones, that she wished to improve with a more forward maxilla.
“Her upper lip was slightly retruded. She presented with maxillary hypoplasia and flat malar (cheekbones) eminences.”