Silane coupling agent used

n = 6

Compressive strength (MPa)

UDMA/TEGDMA-based CR

Bis-GMA/TEGDMA-based CR

Mean

S.D.

Mean

S.D.

L-SCA

330^a

27

453^c

28

KBM-5803

312^a

45

372^b

17

KBM-503

336^a

48

362^b

24