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Retentive characteristics of an internally threaded post system.

作者信息

Laurell K A, O'Neilly P

机构信息

Section of Restorative and Prosthetic Dentistry, Ohio State University, College of Dentistry, Columbus.

出版信息

J Prosthet Dent. 1993 Mar;69(3):258-61. doi: 10.1016/0022-3913(93)90102-t.

DOI:10.1016/0022-3913(93)90102-t
PMID:8445554
Abstract

Internally threaded, stainless steel posts 10 mm in length and 1.82 mm in diameter or stainless-steel Para-Post dowels 1.7 mm in diameter were cemented in extracted human teeth with zinc phosphate cement. Titanium alloy screws 1.5 mm in diameter were placed in the internally threaded posts and tensile force was applied to the screws or Para-Post dowels until dislodgment of the post or fracture. The retention of the Para-Post system was significantly greater than the experimental posts. Although all screws exhibited deformation, there was no breakage or distortion of the internally threaded posts or Para-Post dowels. Retention for both systems exceeded reported forces generated in humans.

摘要

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