BAHADIR ERSU, Özge ARİFAĞAOĞLU, Bulem YÜZÜGÜLLÜ, RAGİBE ŞENAY CANAY

Dentin hassasiyet giderici ajanların tam seramik restorasyonların simantasyonuna etkisi

Amaç: Dentin hassasiyet giderici ajanlar dentin ve rezin siman arasındaki bağlantının zayıflamasına neden olabilmektedir. Bu çalışmanın amacı; gluteraldehit esaslı hassasiyet giderici ajan ve verniğin, tam seramik restorasyonlar ile dentin arasında uygulanan bir rezin simanın kesme dayanımına olumsuz etkisi olup olmadığını incelemektir. Gereç ve Yöntem: Otuz çekilmiş insan molar dişinin okluzal yüzeyleri dentin açığa çıkana kadar aşındırılmış ve dişler (n=10); 1) Gluma (Heraeus Kulzer), 2) Copalite Varnish (Cooley & Cooley Ltd) ve 3) uygulama yapılmamış (kontrol) olacak şekilde rastgele gruplandırılmıştır. Seçilen ajanın uygulanmasını takiben, IPS e.max Press (Ivoclar Vivadent) diskler (5 mm çapında), Panavia F (Kuraray Co. Ltd) rezin siman kullanılarak 3 kg sabit yük altında dentin yüzeyine simante edilmiştir. Tüm örnekler Evrensel test cihazı kullanılarak kesme bağlantı dayanıklılık testine tabi tutulmuştur. Verilerin istatistiksel analizi Kruskal-Wallis ve Dunn's testi uygulanarak yapılmıştır (p

Effect of dentin desensitizers on cementation of full ceramic restorations

Aim: Dentin desensitizers can inhibit bonding between dentin and resin cements. The aim of this study is to examine if pre-treatment with a gluteraldehyde containing desensitizer and cavity varnish have a negative effect on shear bond strength of a resin cement between a full ceramic restoration and dentin.Material and Methods: Thirty extracted human molars' occlusal surfaces were ground to expose dentin; and were randomly grouped as (n=10); 1) Gluma (Heraeus Kulzer), 2) Copalite Varnish (Cooley & Cooley Ltd) and 3) no treatment (control). After applying the selected agent, Panavia F (Kuraray Co. Ltd) resin cement was used to bond IPS e.max Press (Ivoclar Vivadent) discs (5 mm in diameter) to dentin surfaces under a 3 kg static load. Specimens were submitted to shear bond strength test using a Universal testing machine. Data was statistically analyzed using the Kruskal-Wallis and Dunn's tests (p<.05). Results: While the control group showed the highest mean shear bond strength (12.73±3.61 MPa), Gluma group values (8.73±4.95 MPa) revealed statistically insignificant difference compared with the control group. Copalite Varnish group (0.88±0.25 MPa) showed statistically lower values compared to both groups (p<.05). Conclusion: Within the limitation of this in vitro study, it is not recommended to use Copalite Varnish on dentin when used with resin cement due to the decrease they cause in bond strength.

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