It seems I have poor dentofacial growth, and I wonder if it's because the maxilla and mandible are recessed, or if it's because there is a dis-prominent chin. If I stress to put my chin forward, making the bottom teeth row go beyond the front teeth row, it seems to be corrected, so I hypothesise a maxillary retrognathism [needing a bimaxillary advancement surgery].
Answers (1)
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Your primary issue is the underdevelopment of the entire lower jaw. The ideal would be to increase the overbite/overjet with orthodontics (despite your past orthodontics) and advance the lower jaw to achieve the goal. A masking approach with a genioplasty and jawline augmentation is a second...
You appear to have a differential growth issue but the situation does not need correction usually unless you have esthetic concerns or significant symptoms
The issue is quite common unfortunately. The bone 'cut' can 'heal' with a 'dip' and it is very often visible externally. The solution at the time of the surgery is to use a 'strip' of eg gortex to blend the chin advancement with the jawline like a 'bridge' to the bone behind. At this point, you...