Having reflected on my pre-op breathing, I believe, based on what I was told by an eminent surgeon in the UK that I was indeed a nose breather, one of approx 15% who suffer from severe sleep apnoea, (since 85% are mouth breathers) However, due to my underdeveloped jaw and microgenia, as soon as I lay down to sleep my tongue acted as a stopper and blocked the already narrow airways. Whilst CPAP was effective, only double jaw surgery ( counter clockwise rotation) would cure the apnoea completely. The aesthetic benefits are a bonus.