05Jul 2019

EFFECT OF FINISHING AND POLISHING ON MECHANICAL PROPERTIES OF COMPOSITE.

  • Dental Intern, Faculty Of Dentistry, Taif University, Taif, Saudi Arabia.
  • Assistant ProfessorOf Prosthodontic Dentistry, Faculty Of Dentistry, Taif University, Taif, Saudi Arabia.
  • Assistant Professor Of Dental Bioaterial, Faculty Of Dentistry, Taif University, Taif, Saudi Arabia.
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Objective: To evaluate the effect of finishing/polishing systems on the surface roughness, micro-hardness, and modulus of elasticity of different types of composite-resins. Materials and Methods:Specimens were made of four types of composite-resins that packed into special designed blocks, after that, they subjected to light cure. Aluminum-oxide discs (Sof-Lex, 3M ESPE) used to finish\polish half of the specimens immediately. Surface roughness (Ra, μm; n=20), Vickers micro-hardness (200g; 15s; n=20) and Modulus of elasticity (E=FL3/4BH3d, n=20) were measured. The specimens tested before and after immediate finishing/polishing. Data were analyzed by ANOVA and Tukey post Hoc (P<0.05). Result: Finishing/polishing system significantly influenced roughness, micro-hardness and modulus of elasticity (P<0.05). Group A1 [universal] produced significantly least surface roughness (0.07?0.03Ra, ?m) while Group A4 [nano-filled] exhibit the highest micro-hardness (90.06 +3.53VHN) and modulus of elasticity (7.17 +0.45 GPa) in comparison to others. Conclusion: Finishing and polishing procedures have apparent effect on different mechanical properties of composite-resins, render them as critical steps to produce effective and efficient restoration.

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[Abdulmajeed Khalaf Alharthi, Mohammed Hamed Al-Suwat, Abdulrahman Ghazai Aljuaid, Mohammed Khalil Fahmi and Mohamed Ismail Ebrahim. (2019); EFFECT OF FINISHING AND POLISHING ON MECHANICAL PROPERTIES OF COMPOSITE. Int. J. of Adv. Res. 7 (Jul). 430-440] (ISSN 2320-5407). www.journalijar.com

Abdulmajeed Khalaf AlHarthi
Dental Intern, Faculty Of Dentistry, Taif University, Taif, Saudi Arabia.

DOI:

Article DOI: 10.21474/IJAR01/9378      
DOI URL: http://dx.doi.org/10.21474/IJAR01/9378

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