PubMed · 1069676
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M Pokorny. 1976. Endodontic technic for blunderbuss teeth.. https://pubmed.ncbi.nlm.nih.gov/1069676/
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This study compared the quality of the obturation of small, curved root canals laterally condensed with a medium-fine (MF) finger spreader and one of two types of accessory cones. Thirty small, curved canals of permanent molars were cleaned and shaped, then randomly separated into two groups. They were obturated with a standardized master cone and either MF conventional accessory cones of #25 standardized accessory cones. Cross-sectional outs were made at the 2-mm and the 4-mm apical levels. Digitized tracings were made from photomicrographic slides of the cross-sections to determine the percentage of gutta-percha within the canal areas of each cross-section. Statistical analysis revealed no significant difference between the two groups. Results of this study indicate there is no difference in the quality of obturation when using a MF finger spreader with either MF or #25 accessory cones.
A clinical technique for using rectified turpentine oil to soften and dissolve gutta-percha to facilitate retreatment is described. Turpentine oil should be heated to 160 degrees F (71 degrees C) to increase its reactivity before delivery to the canal space.
Rectified turpentine oil can be used to soften or dissolve gutta-percha in the root canal space to facilitate endodontic retreatment or preparation of space for a post. For endodontic retreatment, the turpentine oil can be heated to 71 degrees C which significantly increases its ability to dissolve gutta-percha. For removing only a portion of the gutta-percha while leaving the rest intact, as for the preparation of space for a post, the turpentine oil is delivered to the canal at body temperature (37 degrees C).