EFFECT OF PREHEATING ON MICROLEAKAGE AND MICROHARDNESS OF COMPOSITE RESIN (AN IN VITRO STUDY) | ||||
| Alexandria Dental Journal | ||||
| Article 2, Volume 41, Issue 1, April 2016, Page 4-11 PDF (692.36 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjalexu.2016.59163 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Soliman Eman M* ; Elgayar Ibrahim L* ; Kamar A Adel A* | ||||
| Bachelor of Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt. | ||||
| Abstract | ||||
| INTRODUCTION: advancements in composite restorations have been suggested, including preheating of composite resins before photo polymerization by a heating device. OBJECTIVE: The aim of the study was to investigate the effect of preheating before curing on microleakage and microhardness of composite resins. MATERIALS AND METHODS: thirty extracted human molars were used for microleakage assessment. Sixty class V cavities were made in the buccal and lingual surfaces of teeth, and were randomly divided into three groups according to temperature of composite (Group I: 10 °C, Group II: 24°C, and Group III: 54-60°C). Each group is further divided into two subgroups according to the type of composite (nanohybrid composite (Grandio Voco Germany), and microhybrid composite (Z250 3M Espe), where subgroups (IA, IIC and IIIE received nanohybrid composite), and subgroups (IB, IID and IIIF received microhybrid composite). Microleakage was determined by dye penetration test with scoring criteria from (0-3).sixty composite discs were used in vickers microhardness test (VHN),with same experimental grouping as used in microleakage assessment. VHN was determined using calibrated Vickers indenter. Data were collected, tabulated and statistically analyzed by using ANOVA F-test and Chi-square test (p < 0.05). RESULTS: concerning microleakage ; there was no significant difference between the groups. The cervical margins showed more microleakage than the occlusal margins. The least microleakage was obtained in subgroup IIIE with mean 0.5 ± 1.08 in 80% of specimens occlusaly and, also IIIE showed the least microleakage in 50% of cases with mean 1 ± 1.25 cervically. Concerning top microhardness; subgroups IA obtained the highest mean top VHN 113.35 ±10.1 followed by subgroup IIIE 108.43 ±1.52.While regarding bottom microhardness subgroup IIC obtained the highest mean bottom VHN 88.49± 1.29, followed by subgroup IA with mean value85.49 ± 9.69. CONCLUSION: it was concluded that preheating enhanced microhardness of composite resin materials, but have no effect on microleakage | ||||
| Keywords | ||||
| Microleakage; preheating; Vickers microhardness; Calset; resin composite | ||||
| References | ||||
|
1. Dominguez JA, Bittencourt BF, Farago PV, Pinheiro LA, Gomes OM. Shrinkage stress of resin composites: Effect of material composition – Systematic Review. Braz Dent Sci. 2014; 17: 60-6.
2. Sakaguchi RL, Powers JM. Craig's Restorative Dental Materials. 13th ed. Ch 15. London: Elsevier Health Sciences; 2012.
3. Nada K, El-Mowafy O. Effect of precuring warming on mechanical properties of restorative composites. Int J Dent. 2011; 2011: 536212.
4. Schneider LF, Cavalcante LM, Silikas N. Shrinkage Stresses Generated during Resin-Composite Applications: A Review. J Dent Biomech. 2010; 2010. pii: 131630.
5. Perdigão J, Anauate-Netto C, Carmo AR, Hodges JS, Cordeiro HJ, Lewgoy HR, et al. The effect of adhesive and flowable composite on postoperative sensitivity: 2-week results. Quintessence Int. 2004; 35: 777-84.
6. Manhart J, Chen HY, Mehl A, Weber K, Hickel R. Marginal quality and microleakage of adhesive class V restoration. J Dent. 2001; 29: 123-30.
7. Awliya WY. The influence of temperature on the efficacy of polymerization of composite resin. J Contemp Dent Pract. 2007; 8: 9-16.
8. Lucey S, Lynch CD, Ray NJ, Burke FM, Hannigan A. Effect of pre-heating on the viscosity and microhardness of a resin composite. J Oral Rehabil. 2010; 37: 278-82.
9. Poggio C, Lombardini M, Gaviati S, Chiesa M. Evaluation of Vickers hardness and depth of cure of six composite resins photo-activated with different polymerization modes. J Conserv Dent. 2012; 15: 237-41.
10. Torres CRG, Caneppele TMF, Borges AB, Torres ACM, Araujo MAM. Influence of precure temperature on Vickers microhardness of resin composite. Int J Contemp Dent. 2011; 2: 41-5.
11. Saade EG, Bandeca MC, Rastelli ANS, Bagnato VS, Porto-Neto ST. Influence of Pre-heat treatment and different light-curing units on Vickers hardness of a mcrohybrid composite resin. Laser Physics. 2009; 19: 1276-81.
12. Osternack FH, Caldas DB, Rached RN, Vieira S, Platt JA, Almeida JB. Impact of refrigeration on the surface hardness of hybrid and microfilled composite resins. Braz Dent J. 2009; 20: 42-7.
13. Osternack FH, Caldas DB, Almeida JB, Souza EM, Mazur RF. Effects of preheating and precooling on the hardness and shrinkage of a composite resin cured with QTH and LED. Oper Dent. 2013; 38: 1- 8.
14. Deb S, Di Silvio L, Mackler HE, Millar BJ. Prewarming of dental composites. Dent Mater. 2011; 27: 51-9.
15. Arslan S, Demirbuga S, Zorba YO, Ucar FI, Tuncay O. The effect of pre-heating silorane and methacrylatebased composites on microleakage of class v restorations. Eur J Dent. 2012; 1: 178-82.
16. Fróes-Salgado NR, Silva LM, Kawano Y, Francci C, Reis A, Loguercio AD. Composite pre-heating: effects on marginal adaptation, degree of conversion and mechanical properties. Dent Mater. 2010; 26: 908-14.
17. Daronch M, Rueggeberg FA, De Goes MF. Monomer conversion of pre-heated composite. J Dent Res. 2005; 84: 663-7.
18. Chimello DT, Chinelatti MA, Ramos RP, Palma Dibb RG. In vitro evaluation of microleakage of a flowable composite in Class V restorations. Braz Dent J. 2002; 13: 184-7.
19. Trelles K, Arnabat J, España-Tost T. Microleakage in Class V cavities with self-etching adhesive system and conventional rotatory or laser Er, Cr: YSGG. Laser Ther. 2012; 21: 255-68.
20. Arslan S, Demirbuga S, Ustun Y, Dincer AN, Canakci BC, Zorba YO. The effect of a newgeneration flowable composite resin on microleakage in Class V composite restorations as an intermediate layer. J Conserv Dent. 2013; 16: 189-93.
21. Wagner WC, Aksu MN, Neme AM, Linger JB, Pink FE, Walker S. Effect of pre-heating resin composite on restoration microleakage. Oper Dent. 2008; 33: 72-8.
22. Papadogiannis DY, Lakes RS, Papadogiannis Y, Palaghias G, Helvatjoglu-Antoniades M. The effect of temperature on the viscoelastic properties of nano-hybrid composites. Dent Mater. 2008; 24: 257- 66.
23. Moszner N, Klapdohr S. Nanotechnology for dental composites. Int J Nanotechnol. 2004; 1: 130-56.
24. Rueggeberg FA, Daronch M, Browning WD, DE Goes MF. In vivo temperature measurement: tooth preparation and restoration with preheated resin composite. J Esthet Restor Dent. 2010; 22: 314-22.
25. Watts DC, Al Hindi A. Intrinsic 'soft-start' polymerisation shrinkage-kinetics in an acrylate-based resin-composite. Dent Mater. 1999; 15: 39-45.
26. Uctasli MB, Arisu HD, Lasilla LV, Valittu PK. Effect of preheating on the mechanical properties of resin composites. Eur J Dent. 2008; 2: 263-8.
27. Walter R, Swift EJ Jr, Sheikh H, Ferracane JL. Effects of temperature on composite resin shrinkage. Quintessence Int. 2009; 40: 843-7.
28. Knight JS, Fraughn R, Norrington D. Effect of temperature on the flow properties of resin composite. Gen Dent. 2006; 54: 14-6.
29. Daronch M, Rueggeberg FA, Moss L, de Goes MF. Clinically relevant issues related to preheating composites. J Esthet Restor Dent. 2006; 18: 340-50.
30. Daronch M, Rueggeberg FA, De Goes MF, Giudici R. Polymerization kinetics of pre-heated composite. J Dent Res. 2006; 85: 38-43.
31. Mota CS, Demarco FF, Camacho GB, Powers JM. Microleakage in ceramic inlays luted with different resin cements. J Adhes Dent. 2003; 5: 63-70.
32. Heintze SD. Systematic reviews: I. The correlation between laboratory tests on marginal quality and bond strength. II. The correlation between marginal quality and clinical outcome. J Adhes Dent. 2007; 9(Suppl 1): 77-106.
33. Freedman PD. Clinical benefits of pre-warmed composites. Private Dentistry. 2003; 8: 111-4.
34. Lohbauer U, Zinelis S, Rahiotis C, Petschelt A, Eliades G. The effect of resin composite pre-heating on monomer conversion and polymerization shrinkage. Dent Mater. 2009; 25: 514-9.
35. Karaarslan ES, Usumez A, Ozturk B, Cebe MA. Effect of cavity preparation techniques and different preheating procedures on microleakage of class V resin restorations. Eur J Dent. 2012; 6: 87-94.
36. Tantbirojn D, Chongvisal S, Augustson DG, Versluis A. Hardness and postgel shrinkage of preheated composites. Quintessence Int. 2011; 42: e51-9.
37. Cohen ME, Leonard DL, Charlton DG, Roberts HW, Ragain JC. Statistical estimation of resin composite polymerization sufficiency using microhardness. Dent Mater. 2004; 20: 158-66.
38. Didron PP, Ellakwa A, Swain MV. Effect of preheat temperatures on mechanical properties and polymerization contraction stress of dental composites. Mater Sci Appl. 2013; 4: 374-85.
39. Jim MUK, Kim SK. effect of pre-heating on some physical properties of composite resin. J Korean Acad Conserv Dent. 2009; 34: 30-7 | ||||
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