Retention strength of ball-attachment titanium post for removable partial denture or overdenture

• Published in: Brazilian journal of oral sciences 2020-11, Vol.19, p.e208798
• Main Authors: Melilli, Dario, Wandscher, Vinícius Felipe, Ciocca, Leonardo, Currò, Giuseppe, Parisi, Candida, Gallina, Giuseppe, Baldissara, Paolo
• Format: Article
• Language: English
• Subjects: Air abrasion, dental; Cementation; Denture retention; Surface properties
• ISSN: 1677-3225; 1677-3225
• DOI: 10.20396/bjos.v19i0.8658798

Aim: To evaluate the retention of an endodontic titanium postwith a spherical head for removable partial denture or overdentureattachment according to surface treatment type. Methods: Sixtyhealthy single-rooted teeth, sectioned at the enamel/cementumjunction, were treated endodontically and steadily fixed in theembedding acrylic resin. The titanium posts were subdivided intofour groups: control, no surface treatment (Ctrl); posts with macroretentivegrooves (MR); air abrasion of the post surface (AB); andposts with macro-retentive grooves and air abrasion of the postsurface (MR+AB). The posts were luted in the root canal usingself-adhesive dual resin cement. Pull-out testing was performedusing a universal testing machine until complete detachment wasachieved. After pull-out testing, the metallic posts were examinedunder an optical microscope and the failures were classifiedbased on the cement distribution pattern on the extracted posts:0, no cement left on the post (cement/post failure); 1, postsurface partially covered by adhered cement (post/cement anddentin/cement mixed failure); 2, post surface completely coveredby cement (dentin/cement failure). The retention data wereanalyzed by one-way ANOVA, Bonferroni–Dunn test (p