Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves
Abstract No validated systems exist for selecting the upper instrumented vertebra (UIV) for optimal postoperative shoulder balance in Lenke type 2 adolescent idiopathic scoliosis (AIS). This study evaluated a new method for shoulder balance prediction using the modified Shinshu line (MSL) for UIV se...
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21274-5 |
| _version_ | 1811182342069288960 |
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| author | Tetsuhiko Mimura Shota Ikegami Tomohiro Banno Shoji Seki Tetsuro Ohba Hiroki Oba Shugo Kuraishi Masashi Uehara Ryo Munakata Takashi Takizawa Terue Hatakenaka Takayuki Kamanaka Yoshinari Miyaoka Daisuke Kurogochi Takuma Fukuzawa Hirotaka Haro Yoshiharu Kawaguchi Yukihiro Matsuyama Michihiko Koseki Jun Takahashi |
| author_facet | Tetsuhiko Mimura Shota Ikegami Tomohiro Banno Shoji Seki Tetsuro Ohba Hiroki Oba Shugo Kuraishi Masashi Uehara Ryo Munakata Takashi Takizawa Terue Hatakenaka Takayuki Kamanaka Yoshinari Miyaoka Daisuke Kurogochi Takuma Fukuzawa Hirotaka Haro Yoshiharu Kawaguchi Yukihiro Matsuyama Michihiko Koseki Jun Takahashi |
| author_sort | Tetsuhiko Mimura |
| collection | DOAJ |
| description | Abstract No validated systems exist for selecting the upper instrumented vertebra (UIV) for optimal postoperative shoulder balance in Lenke type 2 adolescent idiopathic scoliosis (AIS). This study evaluated a new method for shoulder balance prediction using the modified Shinshu line (MSL) for UIV selection in AIS Lenke type 2 curves. Fifty-five consecutive AIS patients receiving posterior spinal fusion (PSF) for a Lenke type 2 AIS curve were retrospectively analyzed according to several UIV determination models. Shoulder imbalance was judged as absolute radiographic shoulder height ≥ 10 mm at the 2-year observational endpoint. The MSL was the line between the center of the spinous process of C7 and that of the lowest instrumented vertebra. The vertebral body first touched proximally by the MSL was defined as the MSL vertebra (MSLV) and recommended as the UIV. The group with the UIV matching the MSLV had a significantly lower prevalence of shoulder imbalance of 23% (odds ratio 4.08, 95% CI 1.22–13.7, P = 0.02). Setting the MSLV as the UIV in PSF for AIS Lenke type 2 may reduce the prevalence of postoperative shoulder imbalance. |
| first_indexed | 2024-04-11T09:29:46Z |
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| id | doaj.art-17ca895d1f6b4700a3f875c52d384cd1 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T09:29:46Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-17ca895d1f6b4700a3f875c52d384cd12022-12-22T04:31:54ZengNature PortfolioScientific Reports2045-23222022-10-011211810.1038/s41598-022-21274-5Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curvesTetsuhiko Mimura0Shota Ikegami1Tomohiro Banno2Shoji Seki3Tetsuro Ohba4Hiroki Oba5Shugo Kuraishi6Masashi Uehara7Ryo Munakata8Takashi Takizawa9Terue Hatakenaka10Takayuki Kamanaka11Yoshinari Miyaoka12Daisuke Kurogochi13Takuma Fukuzawa14Hirotaka Haro15Yoshiharu Kawaguchi16Yukihiro Matsuyama17Michihiko Koseki18Jun Takahashi19Department of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Hamamatsu University School of MedicineDepartment of Orthopaedic Surgery, Faculty of Medicine, University of ToyamaDepartment of Orthopaedic Surgery, University of Yamanashi School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, Shinshu University School of MedicineDepartment of Orthopaedic Surgery, University of Yamanashi School of MedicineDepartment of Orthopaedic Surgery, Faculty of Medicine, University of ToyamaDepartment of Orthopaedic Surgery, Hamamatsu University School of MedicineFaculty of Textile Science and Technology, Shinshu UniversityDepartment of Orthopaedic Surgery, Shinshu University School of MedicineAbstract No validated systems exist for selecting the upper instrumented vertebra (UIV) for optimal postoperative shoulder balance in Lenke type 2 adolescent idiopathic scoliosis (AIS). This study evaluated a new method for shoulder balance prediction using the modified Shinshu line (MSL) for UIV selection in AIS Lenke type 2 curves. Fifty-five consecutive AIS patients receiving posterior spinal fusion (PSF) for a Lenke type 2 AIS curve were retrospectively analyzed according to several UIV determination models. Shoulder imbalance was judged as absolute radiographic shoulder height ≥ 10 mm at the 2-year observational endpoint. The MSL was the line between the center of the spinous process of C7 and that of the lowest instrumented vertebra. The vertebral body first touched proximally by the MSL was defined as the MSL vertebra (MSLV) and recommended as the UIV. The group with the UIV matching the MSLV had a significantly lower prevalence of shoulder imbalance of 23% (odds ratio 4.08, 95% CI 1.22–13.7, P = 0.02). Setting the MSLV as the UIV in PSF for AIS Lenke type 2 may reduce the prevalence of postoperative shoulder imbalance.https://doi.org/10.1038/s41598-022-21274-5 |
| spellingShingle | Tetsuhiko Mimura Shota Ikegami Tomohiro Banno Shoji Seki Tetsuro Ohba Hiroki Oba Shugo Kuraishi Masashi Uehara Ryo Munakata Takashi Takizawa Terue Hatakenaka Takayuki Kamanaka Yoshinari Miyaoka Daisuke Kurogochi Takuma Fukuzawa Hirotaka Haro Yoshiharu Kawaguchi Yukihiro Matsuyama Michihiko Koseki Jun Takahashi Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves Scientific Reports |
| title | Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves |
| title_full | Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves |
| title_fullStr | Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves |
| title_full_unstemmed | Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves |
| title_short | Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 2 curves |
| title_sort | usefulness of modified s line for upper instrumented vertebra selection in adolescent idiopathic scoliosis lenke type 2 curves |
| url | https://doi.org/10.1038/s41598-022-21274-5 |
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