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| Art_2008 Explorers Fig. 8 |
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| Art_2010 Williams periodontal probes |
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| Art_2011Merrit A Periodontal probes |
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| Art_2012 Merrit B Periodontal probes |
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| Art_2013 Goldman Fox Periodontal probes |
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| Art_2014 University of Michigan Periodontal probes |
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| Art_2015 Periodontal probes Fig.26G |
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| Art_2016 Double ended periodontal explorers |
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| Art_2050 Double ended periodontal explorers |
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