|
KMID : 1137820210420010001
|
|
의공학회지
2021 Volume.42 No. 1 p.1 ~ p.6
|
|
|
A Study on Pullout Characteristics of Pedicle Screw Design Considering Anatomical Structure of the Lumbar Spine
|
|
Yoo Kyeong-Joo
Park Kwang-Min
Ahn Kyoung-Gee
Ahn Yoon-Ho
|
|
|
Abstract
|
|
|
|
Recently, various types of pedicle screws have been developed considering the anatomical structure of the spine. The purpose of this study was to evaluate the pullout stiffness and strength of two types of commercial pedicle screws. The design of two type screws were single pitched thread (ST) pedicle screw and dual pitched thread (DT) pedicle screw, respectively. The tests were conducted in accordance with the ASTM standards using polyurethane (PU) test blocks which has anatomical structure of the spine. There was no significant difference in pullout stiffness between two types of screw. However, DT exhibited higher pullout strength than ST (p<0.05). Pedicle screw with dual pitched thread showed higher pullout strength without decrease in pullout stiffness compared to the standard pedicle screw. In conclusion, dual pitched thread design of the pedicle screw is considered to be more suitable than the single pitched thread for the anatomical structure of the spine.
|
|
|
KEYWORD
|
|
|
Pedicle screw, Pullout strength, Pullout stiffness, Single pitched thread pedicle screw, Dual pitched thread pedicle screw
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
 
|