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Abstrak :
Efek sandblasting terhadap kekuatan rekat geser veneer indirek resin komposit. Perlekatan antara restorasi veneer indirek resin komposit (VIRK) dengan permukaan email diperoleh dari penggunaan resin semen multi-step (MS). Material self-adhesive dual-cured resin cement (SADRC) dengan satu tahap pemakaian mulai banyak diperkenalkan. Tujuan: Untuk mengetahui efek sandblasting (SB) terhadap kekuatan rekat geser VIRK pada email dengan menggunakan resin semen multi-step dan SADRC. Metode: Empat puluh spesimen yaitu bagian bukal email gigi premolar manusia, diratakan dan dipoles menggunakan silikon karbida. Spesimen VIRK dimasukkan dalam ruang Solidilite untuk penyinaran, kemudian dibagi menjadi 2 grup, tanpa sandblasting (n=20) dan dengan sandblasting selama 10 detik (n=20). Selanjutnya direkatkan pada email dengan menggunakan resin semen multi-step (n=10) dan SADRC (n=10). Setelah 2 jam disimpan dalam inkubator, kekuatan rekat geser spesimen diuji menggunakan Universal Mechanical Testing Machine. Data dianalisis statistik dengan uji one-way ANOVA. Hasil: Nilai rata-rata kekuatan rekat geser multi-step tanpa SB (18,95±7,80MPa) dan multi-step SB (19,30±8,21MPa) memiliki perbedaan bermakna dengan SADRC tanpa SB (4,85±2,12MPa) dan SADRC dengan SB (9,57±3,45MPa)(p<0,05). Simpulan: Sandblasting dapat meningkatkan kekuatan rekat geser VIRK pada email yang menggunakan resin semen multi-step dibandingkan dengan SADRC.

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Attachment between restoration and enamel surface in indirect resin composite veneer restoration (IRCV) is obtained using multi-step (MS) resin coment. Recently, a one step self-adhesive dual-cured resin coment (SADRC) was introduced. Objective: To determine the effect of sandblasting on shear bond strenght (SBS) of IRCV to enamel using MS resin coment and SADRC. Methods: Forty specimens of buccal surface of enamel human premolar were used. The specimens were flattened and polished using silicon carbide. IRCV cylindrical specimens were light-cured in Solidilite chamber and were divided into two groups: IRCV without sandblasting (n=20) and with sandblasting for 10 seconds (n=20) and then bonded to enamel using MS (n=10) and SADRC (n=10), respectively. After 24h SBS of specimens were tested using a Universal Testing machine. Data were analyzed statistically by one-way ANOVA. Results: The average SBS value of IRCV without SB and bonded with MS was 18.95±7.80MPa and MS with SB was 19.30±8.21MPa. They were differ significantly with SADRC without SB (4.85±2.12MPa) and SADRC with SB (9.57±3.45MPa)(p<0.05). Conclusion: Sandblasting significantly increased SBS VIRK to enamel using MS resin cement than SADRC.

Abstrak :
The aim of this in vitro study was to evaluate the shear bond strength of resin composite materials to dentin by using different bonding agents. Forty human premolars were selected for the study, and cylindrical posts of either Spectrum TPH and Charisma were bonded vertically to a standard flat dentinal area, prepared on the buccal survace. A chisel-shaped shearing blade, attached to the crosshead of a universal mechanical testing machine. The shear bond strengths to dentin of 10 resin composite-dentin adhesive combinations were measured. The results showed that the bond strength values of dentin bonding agents were not significant (p>0.05). It seems important for clinicians to use the combination of resin composite and dentin bonding agent recommended by the manufacturer.

Abstrak :
The bond strength between glass ionomer and tooth structure can be improved with application of conditioner on enamel or dentin surface to remove the smear layer. The bond strength can be measured with shear bond strength testing. This study aimed to determine the difference of shear bond strength of glass ionomer cement to primary teeth dentine after conditioner application for 10",20" and 30". Twenty seven primary mandibular incisors were randomly divided into 3 groups that were subjected to application of 10% polyacrylic acid conditioner (Dentin Conditioner, GC) for 10",20" and 30", and restoration with glass ionomer cement (Fuji IX GP, GC). The specimens were kept in an incubator at 37°C for 24 hours. Shear bond strength test was done by using Universal Testing Machine Shimazu AG-5000 with 50 kgf load and crosshead speed of 0.5 mm/min. Anova was used for statistical evaluation. Although the results showed no statistically significant differences in the shear bond strength of the glass ionomer cement between the test groups (p>0.05), the mean bond strength decreased with increasing duration of conditioner application, so that highest mean bond strength was obtained at 10" application.

Abstrak :
Phosphoric acid etching has been widely used to achieve a strong and long lasting mechanical bonding between composite resin restoration and tooth structure. The bond strength between the composite resin restoration and the enamel of permanent teeth can be measured by the shear bond strength of the composite resin restoration. The aim of this study was to evaluate the bond strength between the enamel of permanent teeth and the composite resin restoration by measuring the shear bond strength after different durations of etching. In total 27 premolar teeth were divided into 3 groups where the enamel of the buccal surface was etched with 37% phosphoric acid for 5″, 15″, and 25″ before placing the composite resin restoration. After keeping the teeth inside an incubator for 24 hours, the shear bond strength was measured using a universal testing machine Shimazu AG-5000 at a crosshead speed of 0.5 mm/min. ANOVA was used for statistical analysis of the results, with p<0.05 assumed to imply significance. The mean shear bond strength after etching for 5″, 15″, and 25″ was 16.1 MPa, 17.3 MPa and 19.0 MPa, respectively. The results of ANOVA showed significant difference between the 3 groups. However, subsequent Tukey test showed significant difference between 5″ and 25″ of etching (p<0.05), but no significant difference between between the 5″ and 15″ groups nor between the 15″ and 25″ groups (p>0.05). Conclusion: Shear bond strength of the composite resin on the permanent teeth enamel increased with increasing etching time. Significant difference was showed between 5″ and 25″ of etching time.