مقارنة قوة الارتباط لنظامين من أنظمة ترميم الخزف إلى خزف الزيركون مع الترميل أو من دونه : دراسة مخبرية

Abstract EN

Background& Objective: The Purpose of this study was to evaluate and compare the shear bond strength (SBS) of two composite repair systems to zirconia-ceramic with and without sandblasting.

Materials & Methods: Forty eight specimens (7 mm diameter x 4 mm thickness) of a zirconia ceramic (Zirkonzahn Germany) were fabricated following the manufacturer's instructions, and divided into 2 groups according to the repair CR system (Ivoclar/Vivadent) and PR system( Ultradent.U.S.A), (n=24); group was divided into 3 subgroups according to surface treatment of zirconia specimens (n=8); CR (Sandblasting S.; Phosphoric acid etching Ph; and sandblasting with phosphoric acid S+Ph) and PR (Sandblasting S; Hydrofluoric acid etching HF; and sandblasting with Hydrofluoric acid S+HF), Then CR and PR systems were applied to each bonding area, according to the manufacturer's instructions.

All specimens were tested for (SBS).

Result: The (mean±SD) values (Mpa) for CR system were: (S.11.02±1.36); (Ph 6.88±0.24); (S+Ph.7.46±1.51).

While for PR were: (S.10.99 ±0.35); (HF.10.70±1.25); (S+HF.

8.19±2.24).

One way ANOVA showed statistical significant differences in the bond strength between both systems and any surface treatments tested (P< 0.05).

Conclusion: S increased the SBS of CR and PR systems applied to zirconia-ceramic, HF increased the SBS of PR system to the zirconia-ceramic.