2011 AAEP Focus on Dentistry & other articles
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| In what direction are collagen bundles of the PDL oriented? | multidirectional arrangements.
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| What is the benefit of multidirectional arrangement of collagen fibers in PDL? | motion during the chewing cycle causes tensile load only in distinct groups of fiber bundles
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| which enzyme initiates collagen degradation in PDL remodeling? | matrixmetalloproteinase-1
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| What is the arrangement of the blood vascular system in the PDL? | inner capillary layer
(near the tooth) and an outer venous layer (near the alveolar bone)
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| What is the most notable aspect of the equine PDL? | constant, essential process of tissue
remodeling, which is necessary for the continuous eruption of teeth.
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| Which arcades are more commonly affected by diastemata? JVD Spring 2009 | mandibular
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| which periodontal tissues contain lymphatics? | all except cementum (staszyk JVD 2005)
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| in which periodontal tissues are lymphatic capillaries most densely distributed? | gingiva (staszyk JVD 2005)
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| what is the density/distribution of lymphatic vessels within the PDL? | lymphatic vessels are generally sparse within the PDL. They are more dense in mandibular vs. maxillary tooth PDL. They are absent in the apical PDL of all teeth
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| In what regions is equine cementum cellular? | all. equine cementum is 'always cellular' (Warhonowicz 2006 p.1147)
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