J Clin Diagn Res. 2016 Oct;10(10):ZC55-ZC57.
Comparison of Antibacterial Efficacy of Turmeric Extract, Morinda Citrifolia and 3% Sodium Hypochlorite on Enterococcus faecalis: An In-vitro Study.
Chaitanya BV, Somisetty KV, Diwan A, Pasha S, Shetty N, Reddy Y, Nadigar S.

Noni fruit extract inhibited the growth of Enterococcus faecalis, the bacteria that commonly causes problems in root canals. (original abstract available at https://www.ncbi.nlm.nih.gov/pubmed/27891459).