The Role of Silane Coupling Agents and Universal Primers in Durable Adhesion to Dental Restorative Materials - a Review
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One of the most important aspects in the field of dentistry is adhesion. Adhesion can be enhanced through different mechanisms, most commonly by chemical and mechanical modifications of dental material surfaces. One example of chemical adhesion utilizes primers or bonding agents containing coupling agents. Universal primers which are (mainly organophosphate-based monomers) and silane coupling agents are the most effective and most widely used for unifying dissimilar materials. Other than improving adhesion, Silanes have many other applications in dentistry. They have been found also to enhance the mechanical properties of materials either by adhesion or by becoming a constituent of dental materials itself. Universal primers, on the other hand, are utilized in bonding between different dental materials such as ceramics, metals, alloys, as well as to resin composites. Unfortunately, these primers, coupling agents, and bonding agents have, in general, poor hydrolytic stability. They are susceptible to humid oral environment, which invariably render them potentially unstable in the humid oral environment as saliva is always present. Improving their hydrolytic stability should therefore result in stronger adhesion for dental materials and dental prosthesis with a better clinical survival rate.
KeywordsSilane Coupling agents Primers Bonding agents Fillers Ceramics Composites Silica
The authors would like to acknowledge and thank Ms. Madeline Yon for proof reading the article.
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Conflict of Interest
All the authors of this review article declare that they have no conflict of interest.
Human and Animal Rights and Informed Consent
This article does not contain any studies with human or animal subject performed by any of the authors.
Papers of particular interest, published recently, have been highlighted as: • Of importance
- 1.•C.Y.K. Lung and J.P. Matinlinna, Silanes for adhesion promotion and surface modification, in Silane Chemistry, Applications and Performance, K. Moriguchi and S. Utagawa (Eds.), pg., 87–109. Nova Science Publisher, Hauppage, NY (2013). Gives basic understanding of primers. Google Scholar
- 11.••Matinlinna JP, Ozcan M, Lassila LVJ, Vallittu PK. Applications of trialkoxysilanes in dental biomaterials: a review. In: Mittal KL, editor. Silanes and other coupling agents, Vol 4. Boca Raton: CRC Press; 2007. p. 199–215. Another outstanding article which helps a great deal understanding what silanes are and their actions. CrossRefGoogle Scholar
- 13.Silane E. In: Othmer K, editor. Kirk-Othmer encyclopedia of chemical technology, B. Arkles. London: Wiley; 1997. p. 69–81.Google Scholar
- 17.García AH, Lozano MAM, Vila JC, Escribano AB, Galve PF. Composite resins. A review of the materials and clinical indications. Med Oral Patol Oral Cir Bucal. 2006;11(2):E215–20.Google Scholar
- 24.Mittal KL. Polymer surface modification: relevance to adhesion, 2004, vol 3. CRC Press.Google Scholar
- 29.Fonseca RB, Paula MSd, Favarão IN, Kasuya AVB, Almeida LNd, Mendes GAM, Carlo HL. Reinforcement of dental methacrylate with glass fiber after heated silane application. BioMed Research International 2014 (5):364398 May 2014.Google Scholar
- 42.••Matinlinna JP, Choi AH, Tsoi JK. Bonding promotion of resin composite to silica-coated zirconia implant surface using a novel silane system. Clin Oral Implants Res, 2012. This is a very good article showing why silanization would be more effective after silica coating the substrate first.Google Scholar
- 44.••Quiroz JR, Ozcan M, de Oliveria LF, Della Bona A, Takahashi FE, Bottino MA. Surface characterization of fedspathic ceramic using ATR FT-IR and ellipsometry after various silanization protocols. Dent Mater. 2012;28(2):189–96. Another spectacular article which shows us the importance of different silanization protocols by their chemical analysis.CrossRefGoogle Scholar
- 46.••Matinlinna JP, Mittal KL, Adhesion aspects in dentistry. Leiden, 2009, The Netherlands: Koninklijke Brill NV. An important article showing how and why adhesion is important. Google Scholar
- 50.Murrillo F, De Góes M. Effect of different silane-containing solutions on glass-ceramic/cement bonding interacting with dual-cure resin cements. -ODOVTOS-Int. J. Dental S.C. 2014;16:87–105.Google Scholar
- 69.••Ozcan M, Matinlinna JP. Surface conditioning protocol for the adhesion of resin-based cements to base and noble alloys: how to condition and why? J Adhes Dent. 2015;17(4):372–3. This article gives a very good understanding of grit-blasting and application of silane on the prosthesis.PubMedGoogle Scholar
- 71.Kitayama S, Nikaido T, Ikeda M, Alireza S, Miura H, Tagami J. Internal coating of zirconia restoration with silica-based ceramic improves bonding of resin cement to dental zirconia ceramic. Bio-Med Mater Eng. 2010;20:77–87.Google Scholar
- 74.•Aboushelib MN, Mirmohamadi H, Matinlinna JP, Kukk E, Ounsi HF, Salameh Z. Innovations in bonding to zirconia-based materials. Part II: focusing on chemical interactions. Dent Mater. 2009;25:989–93. An article giving new concepts of bonding dental materials to resin cements.CrossRefPubMedGoogle Scholar
- 77.••Zakir M, Tsoi JK-H, Chu CH, Lung CYK, Matinlinna JP. Bonding dissimilar materials in dentistry: a critical review. Rev Adhes Adhes. 2014; 2(4):413–32. A very important article which reviews the primers including silanes and many others for e.g., zirconates, phosphates, titanates etc . Google Scholar
- 78.••Ozcan M, Matinlinna JP, Vallittu PK, Huysmans MC. Effect of drying time of 3-methacryloxypropyltrimethoxysilane on the shear bond strength of a composite resin to silica-coated base/noble alloys. Dent Mater. 2004;20(6):586–90. This article gives an idea of how adhesion can be promoted by surface modification of noble and base metal alloys.CrossRefPubMedGoogle Scholar
- 89.Najeeb S, Khurshid Z, Matinlinna JP, Siddique F, Mohammad ZN, Baroudi K. Nano-modified PEEK dental implants: bioactivecomposites and surface modification: A review. Int J Dentistry 2015, Artcle ID 381759, 7 pagesGoogle Scholar