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Journal of Dental Research
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Surface Analysis of Etched Molar Enamel by Gas Adsorption

M.F. Orellana1,*, A.E. Nelson2, J.P.R. Carey3, G. Heo4, D.G Boychuk5 and P.W. Major4

1 Orofacial Sciences, Division of Orthodontics, School of Dentistry, University of California, San Francisco, 707 Parnassus Ave., D-1011, Box 0438, San Francisco, CA 94143-0438, USA;
2 Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Canada, and The Dow Chemical Company, Corporate Research and Development, Midland, MI 48674, USA;
3 Mechanical Engineering, Faculty of Engineering, and Faculty of Medicine and Dentistry, University of Alberta, Canada;
4 Orthodontic Graduate Program, Faculty of Medicine and Dentistry, University of Alberta, Canada; and
5 Oral and Maxillofacial Surgery, School of Dentistry, University of California, San Francisco


Figure 1
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  		Figure 1. Schematic drawing representing the different states in the progression of the gas adsorption method. In the present study, only surface area was calculated (from Micromeritics® Analytical Service catalog, reprinted with permission).

 

Figure 2
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  		Figure 2. SEM micrographs showing: (A) type 4 etch pattern, (B) type 5 etch pattern, (C) type 3 etch pattern, and (D) type 1 etch pattern, or "ideal" etch. Each bar represents 60 µm.

 

Figure 3
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  		Figure 3. BET analysis result plots. (A) Krypton adsorption isotherm of enamel sample #1. (B) BET surface area plot for the same sample.

 

Figure 4
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  		Figure 4. Surface area of enamel samples determined by krypton adsorption and calculated by BET equation.

 

Journal of Dental Research, Vol. 87, No. 6, 532-536 (2008)
DOI: 10.1177/154405910808700607
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