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Sendhilnathan D, Nayar S. Indian J Dent Res 2008; 19: 17–21

In this study in vitro, root treated central incisor teeth were restored using different well established techniques and then subjected to lingual loading until tooth fracture. Each restorative method, which did not include quartz fibre posts, was tested on ten teeth. Analysis of variance demonstrated that, somewhat surprisingly, those teeth restored with a customised cast post and core and then crowned with a metal ceramic restoration without a 2 mm ferrule, did as well as the control teeth that were neither root treated, nor restored. Those teeth restored with a prefabricated post and composite core and then a metal ceramic crown had significantly the lowest fracture values regardless as to whether or not there was a ferrule. This study showed that a customised cast post and core, restored with a crown with a 2 mm ferrule, had the highest fracture values.