Effect Of IrrIgatIon SolutIons On Fracture ResIstance Of EndodontIcally Treated Molars

Öz

Purpose: To evaluate the effect of sodium hypochlorite (NaOCl) and ethylenediamine tetraacidic acid (EDTA) irrigation on fracture resistance of endodontically treated. Materials and Methods: Extracted fifty human third molar were selected for this study MOD cavities were prepared. After removing of pulpal floor endodontic accesses were done and the teeth were randomly divided into five groups according to the irrigations (n=10) as follows: G1: irrigation with only distilled water, G2: irrigation with 1 min 5 ml 17% EDTA followed by 1 min 5 ml 5,25% NaOCl, G3: irrigation with 1 min 5 ml 17% EDTA followed by 10 min 5 ml 5,25% NaOCl, G4: irrigation with 10 min 5 ml 17% EDTA followed by 1 min 5 ml 5,25% NaOCl, G5: irrigation with 10 min 5 ml 17% EDTA followed by 10 min 5 ml 5,25% NaOCl. The teeth were restorated with a microhybrid composite resin and specimens subjected to a compressive fracture test in a universal testing machine. The failure modes were analyzed and SEM photograph were taken for each groups. Results: The fracture strengths values were range between 132,76 and 149, 57 Newtons. The highest fracture strength values were shown in G1, also the lower values were obtained in G5; whilst there was not any statistically difference in working groups. The failure mode analyses showed that there were unrestorable cracks in G4 and G5. Conclusion: The NaOCl and EDTA combinations in short exposure times did not effect the fracture resistance strength, although, fracture modes were unrestorable. Araştırma/ Research Article

Anahtar Kelimeler

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Kök Kanal Tedavisi Yapılmış Molar Dişlerde İrrigasyon Solüsyonlarının Kırılma Dirençleri Üzerine Etkisinin İncelenmesi

Öz

Amaç: Bu çalışmanın amacı sodyum hipoklorit (NaOCl) ve etilendiamin tetraasidik asit (EDTA) irrigasyonunun kök kanal tedavisi görmüş dişlerin kırılma dirençleri üzerine olan etkilerinin değerlendirilmesidir. Gereç ve Yöntem: Bu çalışmada elli adet üçüncü büyük azı dişi kullanılmıştır. Seçilen dişlerin MOD kavitelerinin hazırlanmasından sonra pulpa odasının tavanı kaldırılmış, endodontik

Anahtar Kelimeler

• Anahtar Kelimler: Kök kanalı sulayıcıları, Sıkıştırma dayanıklılığı, Azı dişleri.

Kaynakça

1. Cobankara FK, Unlu N, Cetin AR, Ozkan HB. The effect of different restoration techniques on the fracture resistance of endodontically-treated molars. Oper Dent 2008;33:526-33.
2. Reeh ES, Messer HH, Douglas WH. Reduction in Tooth Stiffness as a Result of Endodontic and Restorative Procedures. J Endod 1989;15:512-6. el-Sherif MH, Halhoul MN, Kamar AA, Nour el-Din A. Fracture strength of premolars with Class 2 silver amalgam restorations. Oper Dent 1988;13:50-3.
3. Mondelli J, Steagall L, Ishikiriama A, de Lima Navarro MF, Soares FB. Fracture strength of human teeth with cavity preparations. J Prosthet Dent 1980;43:419-22.
4. Zehnder M. Root canal irrigants. J Endod 2006;32:389-98.
5. Torabinejad M, Handysides R, Khademi AA, Bakland LK. Clinical implications of the smear layer in endodontics: a review. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2002;94:658-66.
6. Currey JD, Brear K, Zioupos P. Dependence of mechanical properties on fibre angle in narwhal tusk, a highly oriented biological composite. J Biomech 1994;27:885-97.
7. Marending M, Paque F, Fischer J, Zehnder M. Impact of irrigant sequence on mechanical properties of human root dentin. J Endod 2007;33:1325-8.
8. Sim TP, Knowles JC, Ng YL, Shelton J, Gulabivala K. Effect of sodium hypochlorite on mechanical properties of dentine and tooth surface strain. Int Endod J 2001;34:120-32.

9. Grigoratos D, Knowles J, Ng YL, Gulabivala K. Effect of exposing dentine to sodium hypochlorite and calcium hydroxide on its flexural strength and elastic modulus. Int Endod J 2001;34:113-9.
10. Di Renzo M, Ellis TH, Sacher E, Stangel I. A photoacoustic FTIRS study of the chemical modifications of human dentin surfaces: II. Deproteination. Biomaterials 2001;22:793-7.
11. Vire DE. Failure of endodontically treated teeth: classification and evaluation. J Endod 1991;17:338-42.
12. Caplan DJ, Weintraub JA. Factors related to loss of root canal filled teeth. J Public Health Dent 1997;57:31-9.
13. Lagouvardos P, Sourai P, Douvitsas G. Coronal fractures in posterior teeth. Oper Dent 1989;14:28-32.
14. McComb D, Smith DC. A preliminary scanning electron microscopic study of root canals after endodontic procedures. J Endod 1975;1(7):238-42. Zadik Y, Sandler V, Bechor R, Salehrabi R. Analysis of factors related to extraction of endodontically treated teeth. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;106:e31-5.
15. Sayin TC, Serper A, Cehreli ZC, Otlu HG. The effect of EDTA, EGTA, EDTAC, and tetracycline-HCl with and without subsequent NaOCl treatment on the microhardness of root canal dentin. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2007;104:418
16. Indira MD, Nandlal B. Comparative evaluation of the effect of cavity disinfectants on the fracture resistance of primary molars restored with indirect composite inlays: an in vitro study. J Indian Soc Pedod Prev Dent 2010;28:258-63.
17. Tulunoglu O, Ayhan H, Olmez A, Bodur H. The effect of cavity disinfectants on microleakage in dentin bonding systems. J Clin Pediatr Dent 1998;22:299-305.
18. Pascon FM, Kantovitz KR, Sacramento PA, Nobredos-Santos M, Puppin-Rontani RM. Effect of sodium hypochlorite on dentine mechanical properties. A review. J Dent 2009;37:903-8.
19. Jagadish S, Yogesh BG. Fracture resistance of teeth with Class 2 silver amalgam, posterior composite, and glass cermet restorations. Oper Dent 1990;15:42-7.
20. Soares CJ, Pizi EC, Fonseca RB, Martins LR. Influence of root embedment material and periodontal ligament simulation on fracture resistance tests. Braz Oral Res 2005;19:11-6.
21. Soares CJ, Martins LR, Pfeifer JM, Giannini M. Fracture resistance of teeth restored with indirectcomposite and ceramic inlay systems. Quintessence Int 2004;35:281-6. Yazışma Adresi
22. Yrd.Doç.Dr. Çağatay BARUTCİGİL Akdeniz Üniversitesi Diş Hekimliği Fakültesi Restoratif Diş Tedavisi AD. 07058/Antalya – Türkiye Tel: [phone] Faks: 902423106967 e-mail: [e-mail]