Retentive properties of misaligned post attachment sleeves

This study determined the retention of different sizes of attachment sleeves when cemented in various alignments with the corresponding post heads. This experiment was divided into six groups of eight samples, except for group 6, which had 10 samples. The retention was measured in pounds using a universal testing machine. In all samples, the malalignment of the sleeve to its corresponding post head did not cause loss of retention compared with the control. In groups 1 and 3, and 0.26 mm offset was introduced and this resulted in increased retention for sleeves to the No. 2 and No. 3 cast post heads. These values for the 0.26 mm offset were statistically significant compared with the control. This cast post system offers the dentist a greater safety factor.