Several chairside hard resin reline materials have been introduced to
improve the fit and function of existing denture bases. However, it is
not known whether the bond strengths among the various chairside reli
ne and denture bass materials are significantly affected by their diff
erences in chemical composition. This study evaluated the bond strengt
hs of five chairside hard reline materials (Extoral VLC, Flexacryl Har
d, Kooliner, Light Liner, and Triad Hi-Flow VLC reline material) to tw
o different denture base resins (Lucitone 199 and Triad VLC) by use of
a three-point transverse flexural test. The reline resins are represe
ntative of autopolymerizing, light- and dual-cured materials. The resu
lts indicate that Triad VLC reline resin with bonding agent gave the h
ighest bond strengths to Triad VLC denture base resin. Light Liner rel
ine resin gave the highest repair bond strengths to Lucitone 199 dentu
re base resin.