Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae
Study Design Biomechanical study. Purpose To assess the correlation between the computed tomography (CT) values of the pedicle screw path and screw pull-out strength. Overview of Literature The correlation between pedicle screw pull-out strength and bone mineral density has been well established. In...
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| Format: | Article |
| Language: | English |
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Korean Spine Society
2020-06-01
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| Series: | Asian Spine Journal |
| Subjects: | |
| Online Access: | http://www.asianspinejournal.org/upload/pdf/asj-2019-0170.pdf |
| _version_ | 1818437163849613312 |
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| author | Atsushi Ikeura Taketoshi Kushida Kenichi Oe Yoshihisa Kotani Muneharu Ando Takashi Adachi Takanori Saito |
| author_facet | Atsushi Ikeura Taketoshi Kushida Kenichi Oe Yoshihisa Kotani Muneharu Ando Takashi Adachi Takanori Saito |
| author_sort | Atsushi Ikeura |
| collection | DOAJ |
| description | Study Design Biomechanical study. Purpose To assess the correlation between the computed tomography (CT) values of the pedicle screw path and screw pull-out strength. Overview of Literature The correlation between pedicle screw pull-out strength and bone mineral density has been well established. In addition, several reports have demonstrated a correlation between bone mineral density and CT values. However, no previous biomechanical studies investigated the correlation between CT values and pedicle screw pull-out strength. Methods Sixty fresh-frozen lumbar vertebrae from 6-month-old pigs were used. Before screw insertion, the CT values of the screw path were obtained for each sample. Specimens were then randomly divided into three equal groups. Each group had one of three pedicle screws inserted: 4.0-mm LEGACY (4.0-LEG), 4.5-mm LEGACY (4.5-LEG), or 4.5-mm SOLERA (4.5-SOL) (all from Medtronic Sofamor Danek Inc., Memphis, TN, USA). Each screw had a consistent 30-mm thread length. Axial pull-out testing was performed at a rate of 1.0 mm/min. Correlations between the CT values and pedicle screw pull-out strength were evaluated using Pearson’s correlation coefficient analysis. Results The correlation coefficients between the CT values of the screw path and pedicle screw pull-out strength for the 4.0-LEG, 4.5-LEG, and 4.5-SOL groups were 0.836 (p<0.001), 0.780 (p<0.001), and 0.873 (p<0.001), respectively. Greater CT values were associated with greater screw pull-out strength. Conclusions The CT values of the screw path were strongly positively correlated with pedicle screw pull-out strength, regardless of the screw type and diameter, suggesting that the CT values could be clinically useful for predicting pedicle screw pull-out strength. |
| first_indexed | 2024-12-14T17:20:19Z |
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| institution | Directory Open Access Journal |
| issn | 1976-1902 1976-7846 |
| language | English |
| last_indexed | 2024-12-14T17:20:19Z |
| publishDate | 2020-06-01 |
| publisher | Korean Spine Society |
| record_format | Article |
| series | Asian Spine Journal |
| spelling | doaj.art-31b7494139264c12b939c349c7971d312022-12-21T22:53:20ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462020-06-0114326527210.31616/asj.2019.01701146Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine VertebraeAtsushi Ikeura0Taketoshi Kushida1Kenichi Oe2Yoshihisa Kotani3Muneharu Ando4Takashi Adachi5Takanori Saito6 Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, Japan Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, Japan Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, Japan Department of Orthopaedic Surgery, Kansai Medical University Medical Center, Moriguchi, Japan Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, Japan Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, Japan Department of Orthopaedic Surgery, Kansai Medical University, Hirakata, JapanStudy Design Biomechanical study. Purpose To assess the correlation between the computed tomography (CT) values of the pedicle screw path and screw pull-out strength. Overview of Literature The correlation between pedicle screw pull-out strength and bone mineral density has been well established. In addition, several reports have demonstrated a correlation between bone mineral density and CT values. However, no previous biomechanical studies investigated the correlation between CT values and pedicle screw pull-out strength. Methods Sixty fresh-frozen lumbar vertebrae from 6-month-old pigs were used. Before screw insertion, the CT values of the screw path were obtained for each sample. Specimens were then randomly divided into three equal groups. Each group had one of three pedicle screws inserted: 4.0-mm LEGACY (4.0-LEG), 4.5-mm LEGACY (4.5-LEG), or 4.5-mm SOLERA (4.5-SOL) (all from Medtronic Sofamor Danek Inc., Memphis, TN, USA). Each screw had a consistent 30-mm thread length. Axial pull-out testing was performed at a rate of 1.0 mm/min. Correlations between the CT values and pedicle screw pull-out strength were evaluated using Pearson’s correlation coefficient analysis. Results The correlation coefficients between the CT values of the screw path and pedicle screw pull-out strength for the 4.0-LEG, 4.5-LEG, and 4.5-SOL groups were 0.836 (p<0.001), 0.780 (p<0.001), and 0.873 (p<0.001), respectively. Greater CT values were associated with greater screw pull-out strength. Conclusions The CT values of the screw path were strongly positively correlated with pedicle screw pull-out strength, regardless of the screw type and diameter, suggesting that the CT values could be clinically useful for predicting pedicle screw pull-out strength.http://www.asianspinejournal.org/upload/pdf/asj-2019-0170.pdflumbar vertebraepigprosthesis failurecomputed tomographypedicle screws |
| spellingShingle | Atsushi Ikeura Taketoshi Kushida Kenichi Oe Yoshihisa Kotani Muneharu Ando Takashi Adachi Takanori Saito Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae Asian Spine Journal lumbar vertebrae pig prosthesis failure computed tomography pedicle screws |
| title | Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae |
| title_full | Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae |
| title_fullStr | Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae |
| title_full_unstemmed | Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae |
| title_short | Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae |
| title_sort | correlation between the computed tomography values of the screw path and pedicle screw pullout strength an experimental study in porcine vertebrae |
| topic | lumbar vertebrae pig prosthesis failure computed tomography pedicle screws |
| url | http://www.asianspinejournal.org/upload/pdf/asj-2019-0170.pdf |
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