The Effect of Pitch Variation and Diameter Variation on Screw Pullout in 3D Printed Screws:

Foot & Ankle Orthopaedics

JoshuaVeenstra¹ 

关键词: Compression Screw Pull Out Strength;   

DOI  :  10.1177/2473011418S00503

学科分类：医学（综合）

来源: Sage Journals

【 摘 要 】

Category:Basic Sciences/BiologicsIntroduction/Purpose:There are many screw and thread designs available to the foot and ankle surgeon for bone fixation. Comparing screws between companies is difficult because properties including core diameter, thread diameter, and pitch confound direct comparisons. There is a paucity of literature on comparative mechanical properties of various screw designs including variable pitch screws and tapered screws. The purpose of this study was to determine the effect of varying thread pitch and/or tapering a screws core diameter. Our hypothesis was that variable pitch screws and tapered screws would have decreased strength compared to screws with constant diameter and constant pitch.Methods:3D metal printing technology was used to manufacture screws that varied in only the test variables. Four different screws designs were created including variable and constant pitch screws in both straight and tapered diameter versions. These screws were pulled out of synthetic bone at a co...

【 授权许可】

CC BY