Fg. Robinson et al., EFFECT OF 10-PERCENT-CARBAMIDE-PEROXIDE ON COLOR OF PROVISIONAL RESTORATION MATERIALS, The Journal of the American Dental Association, 128(6), 1997, pp. 727-731
To improve esthetic results, nightguard vital bleaching of teeth using
40 percent carbamide peroxide, or CP, may be indicated when an anteri
or tooth is restored with a provisional crown, This study evaluated th
e effect of NGVB solutions containing 10 percent CP on the color stabi
lity of provisional restoration materials. Disks were fabricated from
six representative provisional restoration materials and were tested i
n five different 10 percent CP bleaching agents. An orange discolorati
on occurred with provisional materials that contained methacrylate whe
n they were exposed to 10 percent CP bleaching solutions.