The best replacement for intacs is kerarings.

The best alternatives to intacs are rated as following:
★★★★★  kerarings
★  keraflex
  ferrara rings

Your alternative for intacs is not listed? Suggest!
Speaking about intacs, one probably shouldn't forget about c3r.

Other search terms related to intacs and their ratings are:
★★★★★ c3r
★★★ cross linking
You have in mind a companion for intacs and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of intacs in all years. Click on graph for more.
intacs
kerarings
keraflex