Do a mentalis muscle resuspension at the same time as submental chin implant or don't do this at the same time?

I need to have my mentalis muscle resuspended because my mentalis muscle wasnt attached properly from previous surgery. On the other hand, I plan on having a submental chin implant(not intraoral chin implant) because I don't want to risk messing around with mentalis muscle.1.Is it best to do the mentalis muscle resuspension first and wait 12 months later to do the submental chin implant?or 2 Do the mentalis resuspension and submental chin implant at the same time?Any problems with this?