Private Practice, İzmir, Turkey.
Private Practice, İstanbul, Turkey.
BMC Oral Health. 2024 Nov 19;24(1):1403. doi: 10.1186/s12903-024-05106-8.
The purpose of the study is to evaluate the effect of 7 different desensitizing agents on the shear bond strength (SBS) of zirconia restorations to dentin with a self-adhesive resin cement and determine the failure modes.
Eighty molars' occlusal surfaces were ground to expose dentin and were randomly divided into 8 groups (n = 10): 1. Gluma (HEMA/Glutaraldehyde) 2. Bifluoride (Sodium Fluoride/Calcium Fluoride) 3. Admira (Bis-GMA/HEMA) 4. Smart Protect (Glutaraldehyde) 5. Teethmate (Tetracalcium phosphate, Dicalcium phosphate) 6. Clinpro White (Sodium fluoride) 7. BisBlock (Oxalic acid) and 8. Control (No-treatment). After applying the agent, a self-adhesive resin cement (Rely-X U200) was used to lute zirconia discs (4 mm height and 4 mm diameter) to dentin. After stored in distilled water at 37 °C for 24 h, all groups were thermocycled for 2500 cycles between 5 ± 2 °C and 55 ± 2 °C. Specimens were submitted to SBS test with a universal testing machine at a crosshead speed of 0.5 mm/min until failure. SBS values were compared with ANOVA. Post-hoc multiple comparisons were performed with Dunnett T3. The failure modes of specimens were examined with stereomicroscope at a magnification of 20X and the distribution of the failure modes were evaluated with Pearson Chi-Square test.
Regarding mean SBS values in MPa's; Admira (10.70 ± 3.99), Smart Protect (9.62 ± 3.93), and Gluma (8.90 ± 3.76) treatments showed higher SBS values compared to control group (p < .05) according to ANOVA. The SBS values of Teethmate (5.31 ± 2.37) and Clinpro White (4.32 ± 2.44) were higher than control group but the difference was not found significant (p > .05). BisBlock (2.33 ± 1.94) and Bifluouride (1.60 ± 1.47) groups showed the lowest SBS values but their difference between control group was not found statistically significant (p > .05). Most specimens showed adhesive failure but no statistically significant difference was found in the distributions of failure modes according to Chi-square test.
Within the limitation of the study; Admira, Smart Protect, and Gluma increased the SBS of the zirconia restorations to dentin and can be recommended to use on prepared dentin surfaces prior to the cementation.
本研究的目的是评估 7 种不同脱敏剂对自粘接树脂水泥粘结到牙本质的氧化锆修复体的剪切粘结强度（SBS）的影响，并确定其失效模式。
80 个磨牙的咬合面被研磨以暴露牙本质，并随机分为 8 组（n=10）：1. Gluma（HEMA/戊二醛）2. Bifluoride（氟化钠/氟化钙）3. Admira（双甲基丙烯酸酯/HEMA）4. Smart Protect（戊二醛）5. Teethmate（磷酸四钙，磷酸二钙）6. Clinpro White（氟化钠）7. BisBlock（草酸）和 8. 对照组（无处理）。在应用脱敏剂后，使用自粘接树脂水泥（Rely-X U200）将氧化锆圆盘（4mm 高，4mm 直径）粘接到牙本质上。将所有组在 37°C 的蒸馏水中储存 24 小时后，在 5±2°C 和 55±2°C 之间进行 2500 次热循环。使用万能试验机以 0.5mm/min 的十字头速度对试样进行 SBS 测试，直至破坏。使用方差分析比较 SBS 值。使用 Dunnett T3 进行事后多重比较。使用立体显微镜在 20X 的放大倍数下检查试样的失效模式，并使用 Pearson Chi-Square 检验评估失效模式的分布。
关于 SBS 值的平均值（MPa）：Admira（10.70±3.99）、Smart Protect（9.62±3.93）和 Gluma（8.90±3.76）治疗组与对照组相比，SBS 值较高（p<.05）。根据方差分析，Teethmate（5.31±2.37）和 Clinpro White（4.32±2.44）的 SBS 值高于对照组，但差异无统计学意义（p>.05）。BisBlock（2.33±1.94）和 Bifluouride（1.60±1.47）组显示出最低的 SBS 值，但它们与对照组之间的差异无统计学意义（p>.05）。大多数标本显示为粘接力失效，但根据卡方检验，失效模式的分布无统计学差异。
在本研究的限制范围内；Admira、Smart Protect 和 Gluma 提高了氧化锆修复体与牙本质的 SBS 值，可推荐在粘结前用于预备牙本质表面。
