الفهرس 
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Abstract
This study was conducted to evaluate biological dentin posts in primary anterior teeth in comparison to fiber posts and composite resin posts in terms of fracture resistance as well as bond strength to root dentin.
Specimens were divided into three main groups according to the type of post used:
group I: in which biological dentin posts were used. group II: in which fiber posts were used.
group III: in which composite resin posts were used.
Sixty extracted primary anterior teeth were collected from the outpatient clinic of Pediatric Dentistry and Dental Public Health Department. Ten extracted premolars were collected from the outpatient clinic of Oral and Maxillofacial Department. Both departments are in Faculty of Dentistry, Ain Shams University. The teeth were selected according to certain criteria to be used in this study.
The premolars were freshly extracted for orthodontic reasons and were used for preparation of biological dentin posts. Each tooth was decoronated then sectioned longitudinally into two halves along the root canal. Each half was then fixed in acrylic resin block. The milling was then accomplished using CNC milling machine to generate dentin posts of standardized shape and dimensions similar to the red color-coded Easy posts that were used in the study (Kathuria et al., 2011). The prepared dentin posts were all autoclaved at 121°C for 20 minutes before use (Swarupa et al.,
2014).