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Effect of Five Lubricants on Root Canal Walls during the Impression Phase of an Endodontic Post

Jorge Paredes Vieyra*,Julieta Acosta Guardado,Javier Jimenez Enriquez,Miguel Alberto Zamudio Gomez

Objective: Was to identify which lubricant was the best separating medium for taking an impression for an endodontic post and to determine which could be completely and rapidly eliminated from the walls of the post space.

Materials and Methods: Sixty endodontically treated maxillary incisor teeth were used. They were divided into six groups, 10 teeth in each group. Each group used a different lubricant except group 6 which served as the control.

Results: All five experimental groups showed that the oil and grease of the lubricants were difficult to totally eliminate from the porous dentinal surface when washed with 2cc of 96% ethyl alcohol. A post space prepared with Gates Glidden drills results in many opened dentinal tubules. These were filled with impression material when lubricants of groups I and III were used. The best results were obtained with groups 4 and 5 although some impression material remained in the deeper (middle) portion of the post space.

Conclusions: This study showed that urea peroxide and glycerin and liquid hand soap were the most effective lubricating agents and were easier to remove from the post space walls with 2cc of 96% ethyl alcohol as compared with lubricants composed of mineral oil, glycerin or Dura Lay separator.