Jabbour Zaher, Kim Mijoo, Hayashi Marc, Kim Reuben
Section of Interdisciplinary Dentistry, School of Dentistry, University California Los Angeles, Los Angeles, CA 90095, USA.
Restorative Materials Research Laboratory, Section of Restorative Dentistry, School of Dentistry, University California Los Angeles, Los Angeles, CA 90095, USA.
Dent J (Basel). 2023 Jun 28;11(7):161. doi: 10.3390/dj11070161.
Restoring bonding composite to silver diamine fluoride (SDF)-treated enamel is challenging. This study investigates if phosphoric acid etch restores composite bond strength to SDF-treated enamel using universal adhesives.
Twenty-four recently extracted permanent teeth were randomly divided into 4 (2 experimental (SDF) and 2 control (CTR)) groups: SDF+Water: SDF (1 min) then water rinse (15 mL); CTR+Water: no treatment and water rinse (15 mL); SDF+Etch+Water: SDF (1 min), 35% phosphoric acid (40 s) then water rinse (15 mL); CTR+Etch+Water no treatment, 35% phosphoric acid (40 s) then water rinse (15 mL). The enamel surface in all the groups was bonded (All-Bond Universal) to 4-5 mm composite blocks (Z-250). Each sample was sectioned, and 6-8 beams (1 mm × 1 mm) were selected. The micro-tensile bond strength was measured by dividing the micro-tensile force peak by the adhesive surface area. Univariate ANOVA and Chi-square were used for between-group comparisons with < 0.05.
SDF+Water had significantly lower tensile strength compared to all the groups ( < 0.05). Although no difference was found in the tensile strength between the SDF+Etch+Water and the CTR+Etch+Water, the SDF+Etch+Water had significantly more adhesive failures compared to the CTR+Etch+Water ( = 0.047).
While phosphoric acid etch seems to restore the initial composite bond strength to SDF-treated enamel, the long-term success of composite restorations bonded to SDF-treated enamel may need further investigation.
将复合树脂粘结到经氟化银氨（SDF）处理的牙釉质上具有挑战性。本研究调查了使用通用粘结剂时，磷酸酸蚀是否能恢复复合树脂与经SDF处理的牙釉质之间的粘结强度。
将24颗近期拔除的恒牙随机分为4组（2个实验组（SDF组）和2个对照组（CTR组））：SDF+水组：用SDF处理（1分钟），然后用水冲洗（15毫升）；CTR+水组：不做处理，用水冲洗（15毫升）；SDF+酸蚀+水组：用SDF处理（1分钟），再用35%磷酸酸蚀（40秒），然后用水冲洗（15毫升）；CTR+酸蚀+水组：不做处理，用35%磷酸酸蚀（40秒），然后用水冲洗（15毫升）。所有组的牙釉质表面均用（全粘结通用型粘结剂）粘结到4-5毫米的复合树脂块（Z-250）上。将每个样本切片，选取6-8个梁（1毫米×1毫米）。通过将微拉伸力峰值除以粘结剂表面积来测量微拉伸粘结强度。采用单因素方差分析和卡方检验进行组间比较，P<0.05。
与所有组相比，SDF+水组的拉伸强度显著更低（P<0.05）。虽然SDF+酸蚀+水组和CTR+酸蚀+水组的拉伸强度没有差异，但与CTR+酸蚀+水组相比，SDF+酸蚀+水组的粘结失败显著更多（P=0.047）。
虽然磷酸酸蚀似乎能恢复复合树脂与经SDF处理的牙釉质之间的初始粘结强度，但粘结到经SDF处理的牙釉质上的复合树脂修复体的长期成功率可能需要进一步研究。
