COMPARISON OF TOTAL ETCH SYSTEMS AND SELF ETCH SYSTEMS

Öz

Different adhesive systems with different chemical compositions are presented on the market continuously. Companies are trying to make them more powerful in mechanical and chemical properties and also trying to make them easier to use. For this, traditional multistep systems that include phosphoric acid, primer and adhesives are being tried to be exchanged by single package containing systems to make them better. Following the administration of a traditional total etch technique, the primary agent and the adhesive resin acids involve the implementation process. Simplified two-step total-etch technique combines the second and third stage, but the concept of the acid application process is separate. The self-etch adhesive concept is based on the use of polymerisable acidic monomers which performs simultaneous surface arrangement and the primary application. A self-etch adhesive in fact, is a mixture of self etching adhesive acidic monomer that contains cross linking monomers and mono-functional co-monomes. Nowadays most powerfull adhesives are made by strongly acidic adhesive monomers that effectively ensure a strong and durable adhesive layer by free radical copolymerization with the other monomeric components of the adhesive. At that time, the biggest problem of the one bottle adhesives,the hyrolytic instability of metacrylate monomers, comes to scene. The new components mono or difunctional acrylamides could solve the problems, maybe more strong compounds should be placed later. The longevity of attachment, especially in cases where the cavity margins are in dentin, a three stage form of ethanol-water based total etch adhesives are still considered to be the "gold standard" The aim of this article is the comparison of self etch and total etch systems.

Anahtar Kelimeler

• Dentin- Bonding Agent
• Dental Bonding
• Methylmetacrylate
• Acid Etching

TOTAL ETCH SİSTEMLERİN SELF ETCH SİSTEMLER İLE KARŞILAŞTIRILMASI

Öz

Değişik kimyasal kompozisyonlardaki farklı adeziv sistemler sürekli olarak piyasaya sunulmaktadırlar. Firmalar mekanik, kimyasal özellikleri daha güçlü adeziv sistemler yapmaya çalışırlarken aynı zamanda bu sistemlerin uygulanabilirliğini kolaylaştırmaya çalışmaktadırlar. Bunun için geleneksel iki yada üç aşamalı sistemleri tek aşamalı sistemlere dönüştürerek çeşitli basamaklardan oluşan fosforik asit, primer ve adezivi uygulamasını içeren sistemleri tek bir ambalada daha iyi basit ve dayanıklı hale getirmeyi hedeflemektedirler. Total etch tekniği asit uygulamasını takiben primer ajan ve adeziv rezinin uygulanması işlemlerini içerir. Basitleştirilmiş iki aşamalı total-etch tekniği ise ikinci ve üçüncü aşamayı birleştirir ancak asit uygulama işlemi ayrıdır. Selfetch adeziv kavram, yüzey düzenlemesini (asitleme/conditioning) ve primer uygulamasını (priming) eş zamanlı olarak gerçekleştiren polimerize olabilen asidik monomerlerin kullanılması esasına dayanır. Self etch adezivler aslında içeriğindeki asidik monomerin çapraz bağlantı monomeri ve ek olarak monofonk-siyonel ko-monomerlerden oluşan karışımlardır. Günümüzde en etkili adezivler, güçlü asidik adeziv monomer bazlı olanlardır, bu monomerler adezivin diğer monomerik komponentleriyle güçlü serbest radikal kopolimerizasyonu ile güçlü dayanıklı bir adeziv tabaka oluştururlar. İşte tam burada su bazlı yüksek asitli tek şişe self etch adezivlerin en ciddi problemlerinden biri olan metakrilat monomeririnin hidroli-tik durağansızlığı (instabilitesi) devreye girer. Diğer bir problem ise uygulanan komponentlerin yan etkileridir. Hidrolitik stabiliteleri arttırılmış yeni komponentler sorunu çözebilirler. Örneğin, akrilik eter fosfonik asit veya mono- veya difonksiyonel akrilamidler gibi bunlardan başka bu başlangıçla ileride daha da dayanıklı bileşenler geliştirilmelidir. Bağlanmanın uzun ömürlülüğü açısından, özellikle de kavite marjinleri dentinde olduğu durumlarda, üç aşamalı etanol-su bazlı total etch adezivler hala “altın standart" olarak kabul edilmektedir.Bu derlemenin amacı günümüzde kullanılan self etch ve total etch istemlerin karşılaştırılmasıdır.

Anahtar Kelimeler

• Dentin bonding ajan
• dental bonding
• metilmetakrilat
• asid etch

Kaynakça

1. 1. Buonocore MGA. simple method of increasing the adhesion of acrylic filling materials to enamel surfaces. J Dent Res 1955;34:849-53.
2. 2. Bowen RL. Properties of a silica-reinfor-ced polymer for dental restorations. J Am Dent Assoc 1963;66:57-64.
3. 3. Swift EJ, Perdiago J, Heyman HO Bonding to enamel and dentine: A brief history and state of the art: 1995. Quint Int 1995;26:95-110.
4. 4. Triola PT, Swift EJ Shear bond strength of ten dentin adhesive systems. Dent Mater 1992; 8:370-4.
5. 5. Tay F, Carvalho RM, Pashley DH Water movement across bonded dentin - too much of a good thing. J Appl Oral Sci 2004;12:12-25.
6. 6. Van meeerbek B, Lambrechest P, Factors affecting adhesion to mineralized tissues. Oper Dent 2004;5:111-24.
7. 7. Heyman H.O., Boyne S.C. Current concepts in dentin bonding: Focusing on dentinal adhesion factors. JADA 1993;124: 27-36.
8. 8. Van Meeerbek B, Demunck J, Yoshida Y, et al. Buonocore memorial lecture. Adhesion to enamel and dentin: current status and future challenges. Oper Dent 2003;28:215-35.

9. 9. Hamilton CJ, Murphy SM, Atherlon ND, Tighe BJ. Synthetic hydrogels: 4. The permeability of poly(2-hydroxyethyl methacrylate) to cations—an overview of solute-water interactions and transport processes. Polymer F.R. 1998;29:1879-86.
10. 10. Hashimoto M, Tay FR, Sano H, Kaga M, Pashley DH. Diffusion-Induced Water Movement Within Resin-Dentin Bonds During Bonding. Biomed Mater Res Part B: Appl Biomater 2006;79: 453-58.
11. 11. Van Meerbeek B,Perdiago J, Lambrechts P, Van Herle G. The clinical performance of adhesives. J Dent 1998;26: 1-20.
12. 12. Tay FR, Gwinneth JA, Wei SHY. Micro-morphological spectrum from overdrying to overwetting acid-conditioned dentin in water-free, acetone-based, single-bottle primer/adhesives. Dent Mater 1996; 12: 236-44.
13. 13. Jacobsten T, Söderholm KJ. Some effects of water on dentin bonding. Dent Mater 1995; 11:132-6.
14. 14. Hashimoto M, Ohno H, Endo K, Kaga M, Sano H, Oguchui H.The effect of hybrid layer thickness on bond strength: demineralized dentin zone of the hybrid layer Dent Mater 2000; 16: 406-11.
15. 15. Bloomlof J, Boomlof L, Cederlund A, Hultenby K, Lindskog S. A new concept for etching in restorative dentistry Int J Periodontics Restorative Dent 1999; 19:31-5.
16. 16. Hashimoto M, Tay FR, Svizerog NR, De-geed AJ, Feizered AJ, Sano H, Kaga M, Pashley DH. The effects of common errors on sealing ability of total-etch adhesives Dent Mater 2006; 22:560-68.
17. 17. Labella R, Lambrecht P, Vanmeerbeek B, Vanherle G. Polymerisation shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater 1999;15:128-37.
18. 18. De munck J, Vanmeerbeek B, Yoshida Y, et al. Four-year Water Degradation of Total-etch Adhesives Bonded to Dentin. J Dent Res 2003;82:136-140.
19. 19. Demunck J, Vandaylunt K, Peumans M, et al. A Critical Review of the Durability of Adhesion to Tooth Tissue: Methods and Results. J Dent Res 2005;84: 118-32.
20. 20. Moszener N, Saiz U, Zimmerman J. Chemical aspects of self-etching enamel-dentin adhesives: a systematic review. Dental Materials 2005;21: 895-910.
21. 21. Tay FR, King NM, Chan KM, Pashley DH. How can nanoleakage occur in selfetching adhesive systems that demineralize and infiltrate simultaneously? J Adhes Dent 2002;4:255-69.
22. 22. Oliveria SSA, Marshall SJ, Habelızz S, Gansky SA, Wilson RS, Grayson W. Marshall Jr. The effect of a self-etching primer on the continuous demineralization of dentin. Eur J Oral Sci 2004;112:376- 83.
23. 23. Gregoire G, Guignes P, Millas A. Effect of self-etching adhesives on dentin permeability in afluid flow model. J Prosthet Dent 2005; 93(1):56-63.
24. 24. Yoshida E, Uno S, Nodasaka Y, Kaga M, Hirano S. Relationship between water status in dentin and interfacial morphology in all-in-one adhesives. Dent Mater 2007;23(5):556-60.
25. 25. Dönmez N, Belli S, Pashley DH, Tay FR. Ultrastructural Correlates of in vivo/in vitro Bond Degradation in Self-etch Ad- hesives. J Dent Res 2005;84:355-59.
26. 26. Demunck J, Braem M, Wevers M, et al. Micro-rotary fatigue of tooth-biomaterial interfaces. Biomater 2005; 26:1145-53.
27. 27. Gordan VV, Vargas MA, Cobb DS, De-nehey GE. Evaluation of adhesive systems using acidic primers. Am J Dent 1997;10:219-23.
28. 28. Schulzka KA, Oliveria SA, Wilson RS, Gansky SA, Marshall GW, Marshall SJ. Effect of hydration variability on hybrid layer properties of a self-etching versus an acid-etching system. Biomater 2005;26:1011-18.
29. 29. Koshiro K, Inoune S, Tanaka T, et al. In vivo degradation of resin-dentin bonds produced by a self-etch vs. a total-etch adhesive system Eur J Oral Sci 2004;112:368-75.
30. 30. Frankerbergera R, Tay FR. Self-etch vs etch-and-rinse adhesives: effect of thermo-mechanical fatigue loading on marginal quality of bonded resin composite restorations. Dent Mater 2005;21: 397-412.
31. 31. Tay FR, Hashimotho M, Pashely DH, et al. Aging Affects Two Modes of Nanoleakage Expression in Bonded Dentin. J Dent Res 2003;82(7):537-41.
32. 32. Reis FA, Arrais CAG, Novaes PD, Car-vallo RM, De Goes MF, Giannini M. Ult-ramorphological Analysis of Resin-Dentin Interfaces Produced with Water-Based Single-Step and Two-Step Adhesives: Nanoleakage Expression. J Biomed Mater Res Part B: Appl Biomater 2004;71B:90-8.
33. 33. Hasimoto M, S. Ito S, Tay FR, Svizero NR, Sano H, Kaga M, Pashely DH. Fluid Movement across the Resin-Dentin Interface during and after Bonding. J Dent Res 2004;83:843-48.
34. 34. Peumans M, Kanumillı P, Demunck J, Vanlaydunt K, Lambrecht P,Vanmeerbeek B. Clinical effectiveness of contemporary adhesives: A systematic review of current clinical trials. Dent Mater 2005;21:864-81.
35. 35. Oğuzcan MŞ. Bağlayıcı ajanların saklanma koşullarının kompozit rezinlerin dentine olan makaslama bağ dayanımına etkisi, Ankara Üni Sag Bil Enst Diş Hek Fak Doktora tezi, Ankara; 2008:26-119.