Should I have a frenectomy done before dental bonding? (Photo)

If you truly want the best esthetic result I would do the frenectomy and crown lengthening simultaneously.  I would suggest using high force elastics to move centrals together and then bond them together on the lingual to prevent gapping.Closing the midline gap will allow for a more attractive smile and you can close the spaces between centrals and laterals.  Should be quick and easy to accomplish.

If the gap is created by occlusion from lower teeth and possibly pulling the muscles hence teeth apart thendo frenectomy and resin or veneers to close gap.

I am not a big fan of frenectomy unless it s really needed. I think if you correct the space by means of bonding or veneers and then continue on wearing a set of retainers, you should not have any problems. You will be able to close the space and maintain the position of the teeth.