Fig. 1From: Micro-computed tomographic evaluation on the quality of single-cone obturation using a modified passive-deflation sealer injection needle: an in vitro studyModified passive-deflation sealer injection needle and its working mechanism. (a) Picture of the modified passive-deflation injection needle; (b) Picture of the commercial plastic iRoot SP injection needle; (c) Illustration of the modified passive-deflation sealer injection needle; (d) Working mechanism of the modified needleBack to article page