[1] Virginia Commonwealth Univ, Dept Periodont, Richmond, VA USA
[2] Virginia Commonwealth Univ, Sch Engn, Dept Biomed Engn, Richmond, VA USA
[3] Virginia Commonwealth Univ, Sch Biol, Richmond, VA USA
[4] Shanghai Jiao Tong Univ, Sch Med, Coll Stomatol, Gen Dent,Peoples Hosp 9, Shanghai 200030, Peoples R China
[5] Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
[6] Univ Texas Hlth Sci Ctr San Antonio, Dept Periodont, San Antonio, TX 78229 USA