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Pak J Med Sci. 2015 Jul-Aug;31(4):854-9. doi: 10.12669/pjms.314.7517.

Effect of different pH solvents on micro-hardness and surface topography of dental nano-composite: An in vitro analysis.

Pakistan journal of medical sciences

Aftab Ahmed Khan, Adel Zia Siddiqui, Abdulaziz A Al-Kheraif, Ambreen Zahid, Darshan Devang Divakar

Affiliations

  1. Aftab Ahmed Khan, MSc, M.Bioeth, B.D.S Researcher, Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh 11433; Saudi Arabia.
  2. Adel Zia Siddiqui, MSc, B.D.S Associate Professor, Dental Material Sciences, Baqai Dental College, Baqai Medical University, 51 Deh Tor, Toll Plaza, Super Highway, Gadap Road, Karachi 74600; Pakistan.
  3. Abdulaziz A. Al-Kheraif, Ph.D, MSc Associate Professor and Chair, Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh 11433; Saudi Arabia.
  4. Ambreen Zahid, B.D.S Lecturer, Oral Pathology, Muhammad Bin Qasim Dental College, Gulshan-e-Benazir, Razaqabad, Bin Qasim Town, Karachi; Pakistan.
  5. Darshan Devang Divakar, M.D.S, B.D.S Researcher, Dental Biomaterials Research chair, College of Applied Medical Sciences, King Saud University, Riyadh 11433; Saudi Arabia.

PMID: 26430417 PMCID: PMC4590396 DOI: 10.12669/pjms.314.7517

Abstract

OBJECTIVE: Erosion of tooth surface is attributed to recent shift in diet pattern and frequent use of beverages. The aim of this research was to evaluate the effects of different beverages on surface topography and hardness of nano-filled composite material.

METHODS: Sixty flat disc shaped resin composite samples were fabricated and placed in distilled water for 24 hours. After 24 hours test samples were dried and divided into 4 groups. Group A (n=15) specimens were placed in tight amber bottle comprising 25 ml of artificial saliva. Similarly Group B, C and D were stored in equal amounts of orange juice, milk and coca cola drink respectively. Samples were checked for hardness and surface changes were evaluated with scanning electron microscopy.

RESULTS: There were strong significant difference observed in samples immersed in orange juice and artificial saliva. A strong significant difference was seen between Group D and Group A. Group A and Group C showed no significant difference. The micro-hardness test showed reduced values among all samples.

CONCLUSION: Beverages consumed daily have a negative influence on hardness and surface degradation of nano-filled dental composite. Comparatively, nano-filled composites possess higher surface area to volume ratio of their fillers particle size may lead to higher surface roughness than other resin based dental biomaterials.

Keywords: Beverages; Hardness; Microscopy; Nano-filled composite; Surface degradation

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