Don, it's all good.
I lean towards polyphenols as antioxidants and ferulic acid and phloretin are both polyphenols. Probably the finest sencha or gyokuro green tea would provide many times more polyphenols than any toothpaste. Keep in mind any pH adjustment in the mouth is going to be like taste...it will last till the next thing you put in your mouth.
Just so you know, the dentist that asked me to participate in the study supports OCF, was featured in a recent SPOHNC newsletter and my wife works in rad onc in the largest cancer center here in Dallas and has known the dentist for a quite a while. I gave him a pass because of the referential credibility!
Focus on regular cleaning and excellent hygiene and minimal sugar till things settle.
Mondai wa arimasen. Daijoubu desu.

Ed