Retention of various overdenture posts: An in vitro study

Abstract

Context: Tooth retained overdenture helps to reduce the impact of some of the complete denture wearing consequences: Residual ridge resorption, loss of occlusal stability, undermined esthetic appearance, and compromised masticatory function. Aims: This in vitro study compared the retention of three prefabricated overdenture posts cemented with self-adhesive resin cement. Subjects and Methods: Thirty freshly extracted noncarious, healthy mandibular canines were sectioned 1 mm above cementoenamel junction and endodontically treated. The teeth were divided in three groups and prepared for overdenture posts: Group 1: Access post overdenture (EDS, USA), Group 2: Flexi overdenture post (EDS, USA), and Group 3: Ceka Preci-Clix overdenture (Ceka Preci-line, Germany). Posts were cemented with self-adhesive resin cement (Relyx U 100, Germany). Each tooth was positioned identically in the universal testing machine (Instron), and the amount of force necessary to remove a post from the tooth was recorded. Statistical Analysis Used: The results obtained were statistically analyzed using one-way analysis of variance and the comparisons of groups were performed using post hoc Tukey honestly significant difference test. Results: Ceka Preci-Clix overdenture post has maximum mean retention value of 171.57N and access post overdenture has minimum retention value of 98.75N. Conclusions: Ceka Preci-Clix overdenture post was more retentive (171.57) due to its parallel sided design than the other posts used in this study. Flexi overdenture post, due to its split shank threaded design, was the 2 nd most retentive post (128.88) after Ceka Preci-Clix overdenture post and access post overdenture were least retentive post (98.75) due to its thick-walled hollow design.