Where to start a full mouth rehabilitation?

If doing a rehab case of uppers and lowers together, aim to finish the form of the lower arch first. This is because the lower arch is the arch where the aesthetic and occlusal surfaces are the same. Any adjustment of the lower occlusion will result in the change of the aesthetics of the case. However, if you finish the lower arch first, any issues with occlusion can be compensated for in the palatal surface of the upper teeth. Conversely, if you finish the upper arch first and don't get the palatal surface of the upper teeth correct it will affect the position of the lower incisal edge affecting aesthetics.