Comparative Evaluation of Surface Roughness and Microhardness of Composite After Curing Through Mylar Strip, Glycerin and Teflon (PTFE) Tape: An In Vitro Study.
Keywords:
Composite resin, surface roughness, microhardness, Mylar strip, glycerin, Teflon tape, PTFE Tape.
Abstract
Objective: The study aims to evaluate and compare the surface roughness and microhardness of composite resin cured using three different surface protectors: Mylar strip, Glycerin, and Teflon (PTFE) tape, and Air as a Control group.
Methods: 60 composite specimens were prepared and divided into four groups based on the curing method. Surface roughness was analyzed using a profilometer, while microhardness was assessed using a Vickers microhardness tester. Data were statistically analyzed using ANOVA and post-hoc tests.
Results: The PTFE tape group showed the highest microhardness values, followed by glycerin and Mylar. The glycerin group exhibited the smoothest surface (lowest roughness), while the Mylar group had the highest surface roughness. All intergroup differences were statistically significant (p < 0.05).
Conclusion: Both glycerin and PTFE tape are effective alternatives for controlling the oxygen-inhibited layer during composite curing. PTFE tape enhances microhardness, while glycerin results in smoother surfaces. Their appropriate clinical use may improve the mechanical and esthetic performance of composite restorations.
References
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21. COSTA JD, Ferracane J, Paravina RD, Mazur RF, Roeder L. The effect of different polishing systems on surface roughness and gloss of various resin composites. Journal of Esthetic and Restorative Dentistry. 2007 Aug;19(4):214-24.
22. Bollenl CM, Lambrechts P, Quirynen M. Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dental materials. 1997 Jul 1;13(4):258-69.
2. Ilie N, Hickel R. Investigations on mechanical behaviour of dental composites. Clinical oral investigations. 2009 Dec;13:427-38.
3. COSTA JD, Ferracane J, Paravina RD, Mazur RF, Roeder L. The effect of different polishing systems on surface roughness and gloss of various resin composites. Journal of Esthetic and Restorative Dentistry. 2007 Aug;19(4):214-24.
4. Rashid H. The effect of surface roughness on ceramics used in dentistry: A review of literature. European journal of dentistry. 2014 Oct;8(04):571-9.
5. Jain P, Pershing A. Depth of cure and microleakage with high-intensity and ramped resin-based composite curing lights. The Journal of the American Dental Association. 2003 Sep 1;134(9):1215-23.
6. Ryge G, Foley DE, Fairhurst CW. Micro-indentation hardness. Journal of dental research. 1961 Nov;40(6):1116-26.
7. Leprince JG, Palin WM, Vanacker J, Sabbagh J, Devaux J, Leloup G. Physico-mechanical characteristics of commercially available bulk-fill composites. Journal of dentistry. 2014 Aug 1;42(8):993-1000.
8. Merwade S. The role of oxygen inhibited layer on the shear bond strength of composites-An in-vitro evaluation. Journal of Conservative Dentistry and Endodontics. 2007 Jan 1;10(1):1-4.
9. Turssi, C. P., J. L. Ferracane, and K. Vogel. "Filler features and their effects on wear and degree of conversion of particulate dental resin composites." Biomaterials 26.24 (2005): 4932-4937.
10. Park HH, Lee IB. Effect of glycerin on the surface hardness of composites after curing. Restorative Dentistry and Endodontics. 2011;36(6):483-9.
11. Bollenl CM, Lambrechts P, Quirynen M. Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dental materials. 1997 Jul 1;13(4):258-69.
12. Morgan M. Finishing and polishing of direct posterior resin restorations. Practical procedures & aesthetic dentistry: PPAD. 2004 Apr 1;16(3):211-7.
13. Gönülol N, Yılmaz F. The effects of finishing and polishing techniques on surface roughness and color stability of nanocomposites. Journal of dentistry. 2012 Dec 1;40:e64-70.
14. Guiraldo RD, Consani S, Consani RL, Mendes WB, Lympius T, Sinhoreti MA. Effect of different light curing units on Knoop hardness and temperature of resin composite. Indian Journal of Dental Research. 2009 Jul 1;20(3):308-12.
15. Chamunorwa M. Effect Of Polishing Protocol And Exposure To Staining Solutions On The Colour Stability Of Dental Composite Materials (Doctoral dissertation, University of Nairobi).
16. Lassila LV, Tanner J, Le Bell AM, Narva K, Vallittu PK. Flexural properties of fiber reinforced root canal posts. Dental Materials. 2004 Jan 1;20(1):29-36.
17. Carrillo-Marcos A, Salazar-Correa G, Castro-Ramirez L, Ladera-Castañeda M, López-Gurreonero C, Cachay-Criado H, Aliaga-Mariñas A, Cornejo-Pinto A, Cervantes-Ganoza L, Cayo-Rojas CF. The microhardness and surface roughness assessment of bulk-fill resin composites treated with and without the application of an oxygen-inhibited layer and a polishing system: an in vitro study. Polymers. 2022 Jan;14(15):3053.
18. Manis RB, Da Silva TM, Franco TT, Dantas DC, Franco LT, Huhtala MF. Influence of whitening toothpaste on color, roughness, and microhardness of composite resins. European Journal of General Dentistry. 2017 May;6(02):92-8.
19. Andukuri R, Sankaranarayana K. Influence of PTFE Reinforcement on the Tribological Characteristics of Acetal Polymer Composites.
20. Strnad G, Kovacs M, Andras E, Beresescu L. Effect of curing, finishing and polishing techniques on microhardness of composite restorative materials. Procedia Technology. 2015 Jan 1;19:233-8.
21. COSTA JD, Ferracane J, Paravina RD, Mazur RF, Roeder L. The effect of different polishing systems on surface roughness and gloss of various resin composites. Journal of Esthetic and Restorative Dentistry. 2007 Aug;19(4):214-24.
22. Bollenl CM, Lambrechts P, Quirynen M. Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dental materials. 1997 Jul 1;13(4):258-69.
Published
2025-10-18
How to Cite
Nidhi Soni, Masih, U., Chougaonkar, A., Ayaz , B., & Pradhan, sagarika. (2025). Comparative Evaluation of Surface Roughness and Microhardness of Composite After Curing Through Mylar Strip, Glycerin and Teflon (PTFE) Tape: An In Vitro Study. UNIVERSITY JOURNAL OF DENTAL SCIENCES, 11(3), 30-36. https://doi.org/10.21276/ujds.2025.v11.i3.6
Section
Original Research Paper
