الفهرس 
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Abstract
Objective: To evaluate the internal adaptation of different milled post materials using microcomputed tomography (Micro-CT). Materials and methods: Forty mandibular first premolar teeth with a single canal and similar dimensions were distributed into four equal groups (n=10) according to the post material used. Three groups in which different milled post materials used in widely flared root canal: group CV; Custom made Vita Enamic posts, group CP; Custom made PEKK posts, group CF; Custom made fiber posts. Control group in which ready-made fiber posts are used in normal root canal (group RF). All teeth received root canal treatment and were sectioned 1.5 mm above the cemento-enamel junction. The gutta-percha was removed from the root canals of teeth to a total depth of 9 mm from the cutting site. Thirty teeth were flared using a tapered diamond stone of 2.5 mm in diameter while ten teeth were normally prepared using a post drill of 1.2 mm in diameter. A total of thirty milled post-and-core were milled after direct scanning of the flared root canals and ten prefabricated fiber posts were used for the normally flared root canals. Cementation was done using self adhesive, self cure multilink speed resin cement. Each tooth was scanned using a microcomputed tomography (Micro-CT) system. One-way ANOVA test was used for normally distributed data and Kruskal-Wallis test was used for non-normally distributed variables. Significance of the obtained results was judged at the (0.05) level.