Effects of Chitosan as a Novel Obturation Material for Pulpectomized Teeth on Periapical Inflammation, Periodontal Ligament Widening, and Hard Tissue Resorption: A Preliminary Exploratory Study on Dogs.

In the ZOE group, moderate PDL widening followed by mild widening were much more common than severe widening, but comparing with score 2 (moderate widening), the results did not reach statistical significance (P=0.070, one-sample Wilcoxon, Table 3 ) meaning that the median PDL widening grade did not significantly differ from moderate.

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