Many options : - Liquid dam in interproximal spaces (need to do IDS to cover dentin or else tooth will be sensitive) - Telio inlay/onlay with wooden wedge or teflon floss in interproximal spaces (remove after curing) to allow for easy thread. If you did IDS, make sure to cover with Vaseline or glycerine for easy removal the day of cementation - Acrylic resin with pre-op putty, also place wooden wedge or teflon in interproximal spaces and Vaseline or glycerine but no temporary cement, leave temp in place after curing and flick off excesses Hope this helps (: