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Norimasa Iwasaki - One of the best experts on this subject based on the ideXlab platform.
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Impact of Multilevel Facetectomy and Rod Curvature on Anatomical Spinal Reconstruction in Thoracic Adolescent Idiopathic Scoliosis.
Spine, 2018Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Kei Kuroki, Akira Iwata, Norimasa IwasakiAbstract:Study Design.A prospective, nonrandomized study.Objective.The aim of this study was to assess surgical outcomes of multilevel Facetectomy and rod curvature with simultaneous double-rod rotation technique for anatomical spinal reconstruction in thoracic adolescent idiopathic scoliosis (AIS).Summary o
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Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery
PloS one, 2016Co-Authors: Terufumi Kokabu, Hideki Sudo, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Norimasa IwasakiAbstract:Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel Facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel Facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of Facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of Facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel Facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively.
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Correlation analysis between change in thoracic kyphosis and multilevel Facetectomy and screw density in main thoracic adolescent idiopathic scoliosis surgery
The spine journal : official journal of the North American Spine Society, 2016Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Kuniyoshi Abumi, Norimasa IwasakiAbstract:Abstract Background Context Controversy exists regarding the effects of multilevel Facetectomy and screw density on deformity correction, especially thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. Purpose This study aimed to evaluate the effects of multilevel Facetectomy and screw density on sagittal plane correction in patients with main thoracic (MT) AIS curve. Study Design A retrospective correlation and comparative analysis of prospectively collected, consecutive, non-randomized series of patients at a single institution was undertaken. Patient Sample Sixty-four consecutive patients with Lenke type 1 AIS treated with posterior correction and fusion surgery using simultaneous double-rod rotation technique were included. Outcome Measures Patient demographics and preoperative and 2-year postoperative radiographic measurements were the outcome measures for this study. Methods Multiple stepwise linear regression analysis was conducted between change in TK (T5–T12) and the following factors: age at surgery, Risser sign, number of Facetectomy level, screw density, preoperative main thoracic curve, flexibility in main thoracic curve, coronal correction rate, preoperative TK, and preoperative lumbar lordosis. Patients were classified into two groups: TK t tests were used to compare demographic data as well as radiographic outcomes between the two groups. There were no study-specific biases related to conflicts of interest. Results The average preoperative TK was 14.0°, which improved significantly to 23.1° (p Conclusions In patients with hypokyphotic thoracic spine, significant positive correlation was found between change in TK and multilevel Facetectomy or screw density at the concave side. This indicates that in patients with AIS who have thoracic hypokyphosis as part of their deformity, the abovementioned factors must be considered in preoperative planning to correct hypokyphosis.
Hideki Sudo - One of the best experts on this subject based on the ideXlab platform.
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Impact of Multilevel Facetectomy and Rod Curvature on Anatomical Spinal Reconstruction in Thoracic Adolescent Idiopathic Scoliosis.
Spine, 2018Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Kei Kuroki, Akira Iwata, Norimasa IwasakiAbstract:Study Design.A prospective, nonrandomized study.Objective.The aim of this study was to assess surgical outcomes of multilevel Facetectomy and rod curvature with simultaneous double-rod rotation technique for anatomical spinal reconstruction in thoracic adolescent idiopathic scoliosis (AIS).Summary o
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Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery
PloS one, 2016Co-Authors: Terufumi Kokabu, Hideki Sudo, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Norimasa IwasakiAbstract:Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel Facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel Facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of Facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of Facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel Facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively.
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Correlation analysis between change in thoracic kyphosis and multilevel Facetectomy and screw density in main thoracic adolescent idiopathic scoliosis surgery
The spine journal : official journal of the North American Spine Society, 2016Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Kuniyoshi Abumi, Norimasa IwasakiAbstract:Abstract Background Context Controversy exists regarding the effects of multilevel Facetectomy and screw density on deformity correction, especially thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. Purpose This study aimed to evaluate the effects of multilevel Facetectomy and screw density on sagittal plane correction in patients with main thoracic (MT) AIS curve. Study Design A retrospective correlation and comparative analysis of prospectively collected, consecutive, non-randomized series of patients at a single institution was undertaken. Patient Sample Sixty-four consecutive patients with Lenke type 1 AIS treated with posterior correction and fusion surgery using simultaneous double-rod rotation technique were included. Outcome Measures Patient demographics and preoperative and 2-year postoperative radiographic measurements were the outcome measures for this study. Methods Multiple stepwise linear regression analysis was conducted between change in TK (T5–T12) and the following factors: age at surgery, Risser sign, number of Facetectomy level, screw density, preoperative main thoracic curve, flexibility in main thoracic curve, coronal correction rate, preoperative TK, and preoperative lumbar lordosis. Patients were classified into two groups: TK t tests were used to compare demographic data as well as radiographic outcomes between the two groups. There were no study-specific biases related to conflicts of interest. Results The average preoperative TK was 14.0°, which improved significantly to 23.1° (p Conclusions In patients with hypokyphotic thoracic spine, significant positive correlation was found between change in TK and multilevel Facetectomy or screw density at the concave side. This indicates that in patients with AIS who have thoracic hypokyphosis as part of their deformity, the abovementioned factors must be considered in preoperative planning to correct hypokyphosis.
Terufumi Kokabu - One of the best experts on this subject based on the ideXlab platform.
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Impact of Multilevel Facetectomy and Rod Curvature on Anatomical Spinal Reconstruction in Thoracic Adolescent Idiopathic Scoliosis.
Spine, 2018Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Kei Kuroki, Akira Iwata, Norimasa IwasakiAbstract:Study Design.A prospective, nonrandomized study.Objective.The aim of this study was to assess surgical outcomes of multilevel Facetectomy and rod curvature with simultaneous double-rod rotation technique for anatomical spinal reconstruction in thoracic adolescent idiopathic scoliosis (AIS).Summary o
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Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery
PloS one, 2016Co-Authors: Terufumi Kokabu, Hideki Sudo, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Norimasa IwasakiAbstract:Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel Facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel Facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of Facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of Facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel Facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively.
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Correlation analysis between change in thoracic kyphosis and multilevel Facetectomy and screw density in main thoracic adolescent idiopathic scoliosis surgery
The spine journal : official journal of the North American Spine Society, 2016Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Kuniyoshi Abumi, Norimasa IwasakiAbstract:Abstract Background Context Controversy exists regarding the effects of multilevel Facetectomy and screw density on deformity correction, especially thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. Purpose This study aimed to evaluate the effects of multilevel Facetectomy and screw density on sagittal plane correction in patients with main thoracic (MT) AIS curve. Study Design A retrospective correlation and comparative analysis of prospectively collected, consecutive, non-randomized series of patients at a single institution was undertaken. Patient Sample Sixty-four consecutive patients with Lenke type 1 AIS treated with posterior correction and fusion surgery using simultaneous double-rod rotation technique were included. Outcome Measures Patient demographics and preoperative and 2-year postoperative radiographic measurements were the outcome measures for this study. Methods Multiple stepwise linear regression analysis was conducted between change in TK (T5–T12) and the following factors: age at surgery, Risser sign, number of Facetectomy level, screw density, preoperative main thoracic curve, flexibility in main thoracic curve, coronal correction rate, preoperative TK, and preoperative lumbar lordosis. Patients were classified into two groups: TK t tests were used to compare demographic data as well as radiographic outcomes between the two groups. There were no study-specific biases related to conflicts of interest. Results The average preoperative TK was 14.0°, which improved significantly to 23.1° (p Conclusions In patients with hypokyphotic thoracic spine, significant positive correlation was found between change in TK and multilevel Facetectomy or screw density at the concave side. This indicates that in patients with AIS who have thoracic hypokyphosis as part of their deformity, the abovementioned factors must be considered in preoperative planning to correct hypokyphosis.
Yuichiro Abe - One of the best experts on this subject based on the ideXlab platform.
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Impact of Multilevel Facetectomy and Rod Curvature on Anatomical Spinal Reconstruction in Thoracic Adolescent Idiopathic Scoliosis.
Spine, 2018Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Kei Kuroki, Akira Iwata, Norimasa IwasakiAbstract:Study Design.A prospective, nonrandomized study.Objective.The aim of this study was to assess surgical outcomes of multilevel Facetectomy and rod curvature with simultaneous double-rod rotation technique for anatomical spinal reconstruction in thoracic adolescent idiopathic scoliosis (AIS).Summary o
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Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery
PloS one, 2016Co-Authors: Terufumi Kokabu, Hideki Sudo, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Norimasa IwasakiAbstract:Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel Facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel Facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of Facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of Facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel Facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively.
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Correlation analysis between change in thoracic kyphosis and multilevel Facetectomy and screw density in main thoracic adolescent idiopathic scoliosis surgery
The spine journal : official journal of the North American Spine Society, 2016Co-Authors: Hideki Sudo, Terufumi Kokabu, Yuichiro Abe, Manabu Ito, Yoichi M. Ito, Kuniyoshi Abumi, Norimasa IwasakiAbstract:Abstract Background Context Controversy exists regarding the effects of multilevel Facetectomy and screw density on deformity correction, especially thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. Purpose This study aimed to evaluate the effects of multilevel Facetectomy and screw density on sagittal plane correction in patients with main thoracic (MT) AIS curve. Study Design A retrospective correlation and comparative analysis of prospectively collected, consecutive, non-randomized series of patients at a single institution was undertaken. Patient Sample Sixty-four consecutive patients with Lenke type 1 AIS treated with posterior correction and fusion surgery using simultaneous double-rod rotation technique were included. Outcome Measures Patient demographics and preoperative and 2-year postoperative radiographic measurements were the outcome measures for this study. Methods Multiple stepwise linear regression analysis was conducted between change in TK (T5–T12) and the following factors: age at surgery, Risser sign, number of Facetectomy level, screw density, preoperative main thoracic curve, flexibility in main thoracic curve, coronal correction rate, preoperative TK, and preoperative lumbar lordosis. Patients were classified into two groups: TK t tests were used to compare demographic data as well as radiographic outcomes between the two groups. There were no study-specific biases related to conflicts of interest. Results The average preoperative TK was 14.0°, which improved significantly to 23.1° (p Conclusions In patients with hypokyphotic thoracic spine, significant positive correlation was found between change in TK and multilevel Facetectomy or screw density at the concave side. This indicates that in patients with AIS who have thoracic hypokyphosis as part of their deformity, the abovementioned factors must be considered in preoperative planning to correct hypokyphosis.
David Hendel - One of the best experts on this subject based on the ideXlab platform.
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partial lateral patellar Facetectomy as an alternative to lateral release in total knee arthroplasty tka
Journal of Arthroplasty, 2014Co-Authors: Dror Lakstein, Muhammad Naser, Eliyahu Adar, Ehud Atoun, Alexander Edelman, David HendelAbstract:Abstract This study presents the selective use of partial patellar lateral Facetectomy for maltracking during primary TKA, as an alternative to lateral release. Twenty three partial facetectomies were performed out of 191 TKAs (12%). Balanced tracking was achieved in 22 knees. At follow-up 2 patients had persistent anterior knee pain. Mean Knee Society score (KSS) was 94 and mean functional KSS was 86. Mean patellar score was 28. Patellar tilt angles were within 2 degrees in all but one knee. Patellar translation was within 2 mm in all cases. No complications were recorded. A control group of 46 matched patients had similar functional and radiographic results. If tracking is not satisfactory at the conclusion of TKA, our method of choice would be partial lateral Facetectomy.
