Department of Prosthodontics, Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Prosthodontics, Isfahan University of Medical Sciences, Isfahan, Iran.
Clin Exp Dent Res. 2022 Aug;8(4):1002-1007. doi: 10.1002/cre2.593. Epub 2022 May 26.
Complete cleaning of temporary cement before permanent cementation of cement-retained implant-supported prosthesis (CISP) when recementing the crown is critical. This study evaluated the effect of different cleaning methods for removing traces of temporary cement on the final tensile bond force (TBF) of CISP recemented with resin cement.
Seventy computer-aided design/computer-aided manufacturing metal implant-supported copings were prepared and distributed into seven groups (N = 10). Copings of six groups (60 samples) were cemented with temporary cement with eugenol and subjected to 5000 thermocycling. After debonding by a universal testing machine, the internal surfaces of the copings were cleaned using one of the six following methods: 1-an ultrasonic water bath (UW), 2-sandblasting, then washing with water (SW), 3-sandblasting and an ultrasonic water bath (SUW), 4-an ultrasonic isopropyl alcohol bath (UA), 5-sandblasting, then washing with isopropyl alcohol (SA) or 6-sandblasting and an ultrasonic isopropyl alcohol bath (SUA). Then the subjects were subsequently cemented by dual-cure self-adhesive resin cement. In the seventh group (control, N = 10), the copings were cemented by dual-cure self-adhesive resin cement without the temporization phase. The TBF was tested using a universal testing machine with a cross-head speed of 1 mm/min. Two-way analysis of variance (ANOVA) and post-hoc Tamhane tests were used for statistical analysis at a significance level of α = .05.
The maximum mean of TBF value was observed in SUA group (845 ± 203 N), and the minimum was observed in the temporary cement group (49 ± 20 N). All groups which were cleaned with isopropyl alcohol showed significantly higher TBF values compared with those cleaned with water.
Cleaning of the inner surface of metal copings after debonding with sandblasting and isopropyl alcohol results in the highest value of TBF by eliminating the effect of remaining eugenol and removing traces of temporary cements.
在重新粘结带固位体的种植体支持修复体（CISP）的冠时，彻底清除临时粘固剂对于永久粘固至关重要。本研究评估了不同清洁方法去除残留临时粘固剂痕迹对使用树脂粘固剂重新粘结的 CISP 最终拉伸结合力（TBF）的影响。
制备了 70 个计算机辅助设计/计算机辅助制造金属种植体支持的修复体，并将其分为 7 组（N=10）。六组（60 个样本）的修复体用含丁香酚的临时粘固剂粘结，并进行 5000 次热循环。通过万能试验机进行离断后，使用以下六种清洁方法之一对内冠的内表面进行清洁：1-超声水浴（UW），2-喷砂后用水冲洗（SW），3-喷砂和超声水浴（SUW），4-异丙醇超声浴（UA），5-喷砂后用异丙醇冲洗（SA）或 6-喷砂和异丙醇超声浴（SUA）。然后用双固化自粘结树脂粘固剂将试件粘结。在第七组（对照组，N=10）中，不经过临时粘结阶段，直接用双固化自粘结树脂粘固剂粘结。用万能试验机以 1mm/min 的十字头速度测试 TBF。采用双向方差分析（ANOVA）和事后 Tamhane 检验进行统计分析，显著性水平为α=0.05。
SUA 组的 TBF 值最大（845±203N），临时粘固剂组的 TBF 值最小（49±20N）。所有用异丙醇清洗的组的 TBF 值均明显高于用水清洗的组。
喷砂和异丙醇清洁去除残留丁香油并去除残留的临时粘固剂痕迹，可获得最高的 TBF 值。
