KTP Laser on Microleakage of Compomer Restorations in Class V Restorations

Aim: To evaluate the effects of pulsed KTP (potassium-titanyl-phosphate) laser on decrease of dentinal microleakage of compomer restorations in primary teeth. Method: Twenty four primary molars were selected for the study. After Class V cavity preparations in buccal and lingual surfaces, teeth were divided into three groups: Group 1: Control, Group 2: 1 W KTP laser, Group 3: 1.5 W KTP laser. Then cavities were restored with compomer and teeth were thermocycled to 500 cycles, isolated and immersed in 0.5% basic fuchsin for 24 hours. Teeth were rinsed, dried, and sectioned, and microleakage was assessed by dye penetration at the occlusal and gingival surface of the teeth with stereomicroscope (40X). The data were analyzed with Kruskal- Wallis, Mann-Whitney U and Wilcoxon tests. Results: When the scores of microleakage at the gingival margins of the groups were compared, the differences among the groups were found to be statistically significant (p<0.05). At the occlusal margins of the groups, there were no statistical differences (p≯0.05). Comparing the gingival and the occlusal margins in the each group, statistically significant differences existed in the Groups 1 and 3 (p<0.05).Conclusions: KTP laser is able to seal dentinal tubules and consequently reduce microleakage towards pulp in primary teeth.

Class V cavity; KTP laser; microleakage; primary teeth

1. Brunser O, Araya M, Espinoza J, Cruchet S, Pacheco I. Trial of milk with low-lactose contents in acute diarrhea. Rev Chil Pediatr 61: 94-9, 1990.

2. Retief DH, Mandras RS, Russell CM. Shear bond strength required to prevent microleakage of the dentin/restoration interface. Am J Dent 7: 44- 6, 1994.

3. Sturdevant C. The art and science of operative dentistry. 3 ed. Mo: CV Mosby, St. Louis, pp. 141-64, 1995.

4. Anusavice KJ. Philip’s science of dental material. 9 ed. Saunders, Philadel-phia, pp. 85-138, 1991.

5. Ansari G, Creanor SL, Strang R. Microleakage assesment of a compomer restoration following laser caries removal. J Dent Res 77: 633 (abst), 1998.

6. Salama FS. Effect of laser pretreated enamel and dentin of primary teeth on microleakage of different restorative materials. J Clin Pediatr Dent 22: 285- 91, 1998.

7. Mercer C. Lasers in dentistry: a review. Part 2: Diagnosis, treatment and research. Dent Update 23: 120-5, 1996.

8. Roodenburg JL, Panders AK, Vermey A. Carbon dioxide laser surgery of oral leukoplakia. Oral Surg Oral Med Oral Pathol 71: 670-4, 1991.

9. Eversole LR, Rizoiu IM. Preliminary investigations on the utility of an erbium, chromium YSGG laser. J Calif Dent Assoc 23: 41-7, 1995.

10. Aoki A, Ishikawa I, Yamada T, Otsuki M, Watanabe H, Tagami J, Ando Y, Yamamoto H. Comparison between Er:YAG laser and conventional tech-nique for root caries treatment in vitro. J Dent Res 77: 1404-14, 1998.

11. Visuri SR, Gilbert JL, Wright DD, Wigdor HA, Walsh JT Jr. Shear strength of composite bonded to Er:YAG laser-prepared dentin. J Dent Res 75: 599- 605, 1996.

12. Dederich DN. Lasers in dentistry. J Am Dent Assoc 122: 10-12, 1991.

13. Goodis H, White JM, Marshal SJ, Marshal GW, Lee F. Measurement of fluid flow through laser-treated dentine. Arch Oral Biol 39(Supplement 1): 1285, 1994.

14. Miserendino LJ, Levy GC, Rizoiu IM. Effects of Nd:YAG laser on the permeability of root canal wall dentin. J Endod 21: 83-7, 1995.

15. Ribeiro CF, Anido AA, Rauscher FC, Yui KC, Goncalves SE. Marginal leakage in class V cavities pretreated with different laser energy densities. Photomed Laser Surg 23(3): 313-6, 2005.

16. Machida T, Wilder-Smith P, Arrastia AM, Liaw LH, Berns MW. Root canal preparation using the second harmonic KTP:YAG laser: a thermographic and scanning electron microscopic study. J Endod 21: 88-91, 1995.

17. Schoop U, Kluger W, Dervisbegovic S, Goharkhay K, Wernisch J, Geor-gopoulos A, Sperr W, Moritz A. Innovative wavelengths in endodontic treatment. Lasers Surg Med Jul;38: 624-30, 2006.

18. Siso HS, Kustarci A, Goktolga EG. Microleakage in resin composite resto-rations after antimicrobial pre-treatments: effect of KTP laser, chlorhexi-dine gluconate and Clearfil Protect Bond. Oper Dent 34: 321-7, 2009.

19. Kustarci A, Sumer Z, Altunbas D, Kosum S. Bactericidal effect of KTP laser irradiation against Enterococcus faecalis compared with gaseous ozone: an ex vivo study. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 107: 73-9, 2009.

20. Tewfik HM, Pashley DH, Horner JA, Sharawy MM. Structural and func-tional changes in root dentin following exposure to KTP/532 laser. J Endod 19: 492-7, 1993.

21. Camp JH. Pediatric Endodontic Treatment. Endodontic treatment for the primary and young permanent dentition. In: Cohen S, Burns RC, eds. Path-ways of the pulp. 8 ed. MO: Mosby, St Louis, USA: 797–844, 1994.

22. Fuks AB, Eidelman E. Pulp therapy in the primary dentition. Curr Opin Dent 1: 556–63, 1991.

23. Berg JH. The continuum of restorative materials in pediatric dentistry--a review for the clinician. Pediatr Dent 20: 93-100, 1998.

24. Fleming GJ, Burke FJ, Watson DJ, Owen FJ. Materials for restoration of primary teeth: I. Conventional materials and early glass ionomers. Dent Update 28: 486-91, 2001.

25. Burke FJ, Fleming GJ, Owen FJ, Watson DJ. Materials for restoration of primary teeth: 2. Glass ionomer derivatives and compomers. Dent Update 29: 10-4, 16-7, 2002.

26. Garcia-Godoy F. Resin-based composites and compomers in primary molars. Dent Clin North Am 44: 541-70, 2000.

27. Gross LC, Griffen AL, Casamassimo P.S. Compomers as Class II resto-rations in primary molars. Pediatr Dent 23: 24-7, 2001.

28. Turgut MD, Tekcicek M, Olmez S. Clinical evaluation of a polyacid-modi-fied resin composite under different conditioning methods in primary teeth. Oper Dent 29: 515-23, 2004.

29. Tran LA, Messer LB. Clinicians’ choices of restorative materials for chil-dren. Aust Dent J 48: 221-32, 2003.

30. Santini A, Ivanovic V, Ibbetson R, Milia E. Influence of cavity configura-tion on microleakage around Class V restorations bonded with seven self-etching adhesives. J Esthet Restor Dent 16: 128-35, 2004.

31. Koliniotou-Koumpia E, Dionysopoulos P, Koumpia E. In vivo evaluation of microleakage from composites with new dentine adhesives. J Oral Rehabil 31: 1014-22, 2004.

32. Alani AH, Toh CG. Detection of microleakage around dental restorations: a review. Oper Dent 22: 173-85, 1997.

33. Piva E, Martos J, Demarco FF. Microleakage in amalgam restorations: influence of cavity cleanser solutions and anticariogenic agents. Oper Dent 26: 383-8, 2001.

34. Trowbridge HO. Model systems for determining biologic effects of micro-leakage. Oper Dent 12: 164-72, 1987.

35. Gale MS, Darvell BW. Dentine permeability and tracer tests. J Dent 27: 1- 11, 1999.

36. Marchiori S, Baratieri LN, de Andrada MA, Monteiro Junior S, Ritter AV. The use of liners under amalgam restorations: an in vitro study on marginal leakage. Quintessence Int 29: 637-42, 1998.

37. Staninec M, Holt M. Bonding of amalgam to tooth structure: tensile adhe-sion and microleakage tests. J Prosthet Dent 59: 397-402, 1988.

38. Toledano M, Osorio E, Osorio R, Garcia-Godoy F. Microleakage and SEM interfacial micromorphology of amalgam restorations using three adhesive systems. J Dent 28: 423-8, 2000.

39. Obeidi A, Ghasemi A, Azima A, Ansari G. Effects of pulsed Nd:YAG laser on microleakage of composite restorations in class V cavities. Photomed Laser Surg 23: 56-9, 2005.

40. White JM, Goodis HE, Setcos JC, Eakle S, Hulscher BE, Rose CL. Effects of pulsed Nd:YAG laser energy on human teeth: a three-year follow-up study. J Am Dent Assoc 124: 45-51, 1993.

41. Araujo RM, Eduardo CP, Duarte Junior SL, Araujo MA, Loffredo LC. Microleakage and nanoleakage: influence of laser in cavity preparation and dentin pretreatment. J Clin Laser Med Surg 19: 325-32, 2001.

42. Kawaguchi FA, Eduardo CP, Matos AB. Nd:YAG laser influence on micro-leakage of class V composite restoration. Photomed Laser Surg 22: 303-5, 2004.

43. Martinez-Insua A, Da Silva Dominguez L, Rivera FG, Santana-Penin UA. Differences in bonding to acid-etched or Er:YAG-laser-treated enamel and dentin surfaces. J Prosthet Dent 84: 280-8, 2000.

44. Corpas-Paster L, Moreno V, Garrido JDL, Pedraza Muriel V, Moore K, Elias A. Comparing the tensile strength of brackets adhered to laser-etched enamel vs. acid-etched enamel J Am Dent Assoc 128: 732-7, 1997.

45. Gutknecht N, Apel C, Schäfer C, Lampert F. Microleakage of composite fillings in Er,Cr:YSGG laser-prepared class II cavities. Lasers Surg Med 28: 371-4, 2001.