تأثير نظام الإنهاء و التلميع في الثبات اللوني للكمبوزيت السيلوراني

الملخص EN

Background and Aim: The purpose of this study was to evaluate the effect of different finishing/polishing systems on color stability of Silorane based composite and to compare it with the Methacrylate based composite after immersion in coffee.

Materials and Methods: 60 cylindrical discs were prepared using a teflon mold (5mm diameter,2mm height) of one methacrylate-based composite (Filtek Z250XT-3M ESPE), and one silorane- based composite (Filtek P90-3M ESPE), 30 specimens of each, and were light-cured by ( Elipar -3M ESPE -1000 mw/cm2-20 seconds).

Specimens were stored in distilled water for 24 hours.

Each material group was divided into 3 subgroups (n=10) according to the finishing /polishing system using (Sof-lex XT Discs-3M ESPE),( Spiral Wheels- Sof-lex -3M ESPE) and (Astropol-Ivoclar Vivadent).

The color of each specimen was measured before exposure using a spectrophotometer (VITA Easy Shade Compact-VITA Zahnfabrik).

Specimens were immersed in coffee for (15m/7days) and the color of each specimen was measured after exposure and color change ■ il£'i was obtained usin∆g the same device.

Results were statistically analyzed by one-way ANOVA, Bonferroni, and t-tests at significance level of (p<0.05).

Results: The Mean ∆E value of Z250XT (∆E =2.55) was statistically different from P90 (∆E =3.27) in Sof- lex XT group.

No significant differences were found between the two composites in the other finishing /polishing groups.

The mean &E value of Sof-lex XT (∆t =2.55) was statistically different from Astropol (∆E =3.11) in Methacrylate-based composite ( Z250XT) group.

No significant differences were found between the finishing /polishing systems in Silorane- based composite P90 group.

Conclusions: Methacrylate-based composite showed better color stability than Silorane-based composite when was finished with aluminum oxide-containing disc.

Aluminum oxide-containing disc was better in achieving color stability for Methacrylate-based composite than rubber cups.