An in vitro evaluation of the effect of autoclave sterilization on fracture resistance of biologic posts

Author: 
Bhanu pratap V., Madhu Varma K, Pedireddi Suresh, and Kalyan Satish R

Aim To evaluate the effect of autoclave sterilization on fracture resistance of biologic posts used in conjunction with restorative composite core.

Materials And Methods Root canal treatment was performed on 40 maxillary central incisors. Post space was prepared and samples were divided into four groups of 10 each. The teeth were inserted with prefabricated biological post prepared from 20 canines. 20 biological posts were prepared from 10 canines, half (10 posts) of them were sterilized in autoclave for 40 mins. 20 sections were obtained from other 10 canines, half of them were sterilized and remaining sections were unsterilized. Posts were fabricated and cemented using adhesive resins and core was fabricated with restorative composite material. Fracture load was evaluated using universal testing machine at a cross head speed of 5mm/min. Fracture above the embedded resin was considered favourable and fracture below the resin level was considered unfavourable. The results were analyzed using ANOVA and unpaired‘t’ test.

Results There was no significant difference between fracture resistance of sterilized and un sterilized biological post groups.
Conclusion Within the limitations of the study autoclaving does not influence on the fracture resistance of biologic posts in conjunction with composite core build up.

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