This spring, Jelly Roll underwent a total dental reconstruction and came out with a fresh set of pearly whites. Jelly’s teeth transformation addressed both health and cosmetic issues. When he first went to the dentist, he said he was replacing the veneers he’s had for the past two decades, as well as “getting some implants and getting some cavities and wisdom teeth pulled out.” Now, his dentist — Dr. Matt Kasiar, the top cosmetic dentist at the Practice in Franklin, Tenn. – is sharing an inside look into Jelly’s dental makeover, literally. On Instagram, Kasiar and the rest of his team took fan…