Palaskar Jayant N, Hindocha Amit Dhansukhlal, Nalawade Tejas V, Khurana Shrishti R, Patankar Anupama, Shah Naisargi
Department of Prosthodontics, Sinhgad Dental College and Hospital, Pune, Maharashtra, India.
Department of Prosthodontics, Terna Dental College, Navi Mumbai, Maharashtra, India.
J Indian Prosthodont Soc. 2024 Oct 1;24(4):397-403. doi: 10.4103/jips.jips_543_23. Epub 2024 Oct 15.
To assess and analyze the bond strength of polymeric organic clay and heat polymerized PMMA with RTV maxillofacial silicone with and without an adhesive primer.
The use of polymeric clay as a substructure for implant retained maxillofacial silicone prosthesis is suggested. However, the bond strength of polymeric clay with room temperature vulcanizing (RTV) maxillofacial silicone and heat polymerized polymethyl methacrylate(PMMA) with RTV maxillofacial silicone has yet to be studied.
Fifty two samples were prepared in total. Group 1 (n = 13) silicone and PMMA without primer. Group 2 (n = 13) silicone and PMMA with primer. Group 3 (n = 13) silicone and polymer clay without primer. Group 4 (n = 13) silicone and polymer clay with primer. The samples were of dimensions of 75 mm × 10 mm × 3 mm. For groups 1 and 2, samples were fabricated with PMMA over which RTV silicone was manipulated, packed and vulcanized for 24 h. For Groups 3 and 4, polymer clay was molded to the required dimensions and hardened. RTV maxillofacial silicone was manipulated and packed over it and vulcanized. For Group 2 and 4 samples, primer was applied to the uncovered part of PMMA and polymeric clay respectively. The samples were subjected to a 180° and 90° (t peel test) peel strength test, respectively.
One way analysis of variance was used to analyze bond strength, which was then followed by a post hoc Tukey's test.
The mean bond strength of silicone and PMMA without primer was 0.35 ± 0.07 mN/m, while silicone and PMMA with primer had a mean bond strength of 0.41 ± 0.04 mN/m. The mean bond strength of silicone and polymer clay without primer and silicone and polymer clay with primer was found to be 0.45 ± 0.13 mN/m and 0.30 ± 0.05 mN/m, respectively. An 80% research power and a 95% confidence interval were used in the statistical analysis. A significance threshold of P < 0.05 was applied.
The silicone to heat polymerized PMMA primer bond strength is the same as the silicone to polymer clay primer bond strength. Bond strength of polymer clay and maxillofacial silicone without primer is better than with primer. Therefore, without primer application, polymer clay substitutes PMMA as an interface between maxillofacial silicone material and attachments/keepers.
评估和分析有无粘结底漆时，聚合有机粘土及热聚合聚甲基丙烯酸甲酯（PMMA）与室温硫化（RTV）颌面硅橡胶之间的粘结强度。
有人建议使用聚合粘土作为种植体固位颌面硅橡胶假体的子结构。然而，聚合粘土与室温硫化（RTV）颌面硅橡胶以及热聚合聚甲基丙烯酸甲酯（PMMA）与RTV颌面硅橡胶之间的粘结强度尚未得到研究。
共制备52个样本。第1组（n = 13）：不含底漆的硅橡胶和PMMA。第2组（n = 13）：含底漆的硅橡胶和PMMA。第3组（n = 13）：不含底漆的硅橡胶和聚合粘土。第4组（n = 13）：含底漆的硅橡胶和聚合粘土。样本尺寸为75 mm×10 mm×3 mm。对于第1组和第2组，样本由PMMA制成，在其上操作、填充并硫化RTV硅橡胶24小时。对于第3组和第4组，将聚合粘土模制成所需尺寸并硬化。在其上操作并填充RTV颌面硅橡胶并硫化。对于第2组和第4组样本，分别将底漆涂覆在PMMA和聚合粘土的未覆盖部分。样本分别进行180°和90°（t剥离试验）剥离强度测试。
采用单因素方差分析来分析粘结强度，随后进行事后Tukey检验。
不含底漆的硅橡胶和PMMA的平均粘结强度为0.35±0.07 mN/m，而含底漆的硅橡胶和PMMA的平均粘结强度为0.41±0.04 mN/m。不含底漆的硅橡胶和聚合粘土以及含底漆的硅橡胶和聚合粘土的平均粘结强度分别为0.45±0.13 mN/m和0.30±0.05 mN/m。统计分析中使用了80%的检验效能和95%的置信区间。应用P < 0.05的显著性阈值。
硅橡胶与热聚合PMMA底漆的粘结强度与硅橡胶与聚合粘土底漆的粘结强度相同。不含底漆时，聚合粘土与颌面硅橡胶的粘结强度优于含底漆时。因此，不使用底漆时，聚合粘土可替代PMMA作为颌面硅橡胶材料与附件/固定器之间的界面。
