Like many cutting-edge techniques, supra-gingival minimally invasive techniques are newer and require additional training. These techniques sometime require the use of more expensive materials and equipment. Supra-gingival minimally invasive techniques are extremely well-researched and extremely successful. They have been used, researched, and published by a few of the leaders in minimally invasive dentistry.
By minimizing the amount of tooth drilled away and staying away from the gum: