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Article ; Online: No short-term clinical improvement and mean 6° of thoracic kyphosis correction using limited-level Ponte osteotomy near T7 for Lenke type 1 and 2 adolescent idiopathic scoliosis: a preliminary study.

Tanida, Shimei / Masamoto, Kazutaka / Tsukanaka, Masako / Futami, Toru

Journal of pediatric orthopedics. Part B

2023 Volume 32, Issue 6, Page(s) 537–546

Abstract: This study was a retrospective single surgeon case series approved by institutional review board and showed the efficacy of limited Ponte osteotomy at T6/7, 7/8 and 8/9 (limited-PO) in the sagittal plane for patients with Lenke type 1 and 2 adolescent ... ...

Abstract	This study was a retrospective single surgeon case series approved by institutional review board and showed the efficacy of limited Ponte osteotomy at T6/7, 7/8 and 8/9 (limited-PO) in the sagittal plane for patients with Lenke type 1 and 2 adolescent idiopathic scoliosis (AIS). A total of 37 consecutive patients [7 males and 30 females; average age 16.0 ± 2.5 (range: 12-21)] over a 4-year period with posterior corrective fusion surgery were included. Initially, 18 patients were operated on without limited-PO [P(-)-group]. Midway in the series, the senior author switched to the limited-PO [P(+)-group]. The limited-PO has been performed to form the apex of thoracic kyphosis at the T7 level, together with the restoration of thoracic kyphosis. The mean amount of the correction angle of thoracic kyphosis was more in the P(+)-than in P(-)-group (13.8 ± 9.6° vs. 7.8 ± 8.0°, P = 0.046) at 1-year after surgery. Cervical lordosis was spontaneously corrected more in P(+)-than in P(-)-group. The apex of thoracic kyphosis was controlled around the T7 level postoperatively in most cases (18/19 cases). There was no significant difference between the two groups in terms of blood loss and operative time per level, or Scoliosis Research Society-22 domain scores. Limited-PO contributed to the restoration of the whole spinal sagittal alignment for Lenke type 1 and 2 AIS; however, in this preliminary study, the clinical improvement was unclear at least in the short term, because the kyphosis angle obtained by limited-PO was only approximately 6°.
MeSH term(s)	Male ; Female ; Humans ; Adolescent ; Scoliosis/diagnostic imaging ; Scoliosis/surgery ; Retrospective Studies ; Treatment Outcome ; Thoracic Vertebrae/diagnostic imaging ; Thoracic Vertebrae/surgery ; Spinal Fusion ; Kyphosis/diagnostic imaging ; Kyphosis/surgery ; Osteotomy
Language	English
Publishing date	2023-03-20
Publishing country	United States
Document type	Journal Article
ISSN	1473-5865
ISSN (online)	1473-5865
DOI	10.1097/BPB.0000000000001074
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Article ; Online: Modification to the placement of the navigation reference frame in posterior corrective fusion of spinal deformity with myelomeningocele: a series of 6 cases.

Tanida, Shimei / Masamoto, Kazutaka / Tsukanaka, Masako / Futami, Toru

Journal of pediatric orthopedics. Part B

2023

Abstract: To show a modified placement of the navigation reference frame in posterior corrective fusion of spinal deformity with myelomeningocele. This was a retrospective, single-surgeon case series, and IRB-approved study. Six consecutive patients (one male and ... ...

Abstract	To show a modified placement of the navigation reference frame in posterior corrective fusion of spinal deformity with myelomeningocele. This was a retrospective, single-surgeon case series, and IRB-approved study. Six consecutive patients (one male and five females) who were diagnosed with spinal deformity with myelomeningocele underwent posterior corrective fusion surgery from the upper thoracic spine to the pelvis with preoperative computed tomography navigation (pCTN). At the level of the spina bifida, where posterior elements such as the spinous process were missing, the reference frame of the pCTN was placed on the flipped lamina or pedicles, and a pedicle screw (PS) or iliac screw (IS) was inserted. Screw deviation was investigated by using postoperative CT. A total of 55 screws were placed at the spina bifida level and pelvis. Of these, 12 ISs were placed on each side in each case. The screws placed using the pCTN were not reinserted or removed intraoperatively or postoperatively. However, only one PS was found to have perforated the spinal canal on postoperative CT but was left in place because it caused no neurological problem. By modifying the placement of the reference frame, such as placing it on the flipped lamina or pedicles, pCTN could be used even at the levels of the spina bifida, where the posterior elements are missing, to accurately place PSs and various types of ISs.
Language	English
Publishing date	2023-07-03
Publishing country	United States
Document type	Journal Article
ISSN	1473-5865
ISSN (online)	1473-5865
DOI	10.1097/BPB.0000000000001108
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Article ; Online: Pressure Dynamics on Intervertebral Disc Cages in Transforaminal Lumbar Interbody Fusion: A Cadaver Study.

Takaki, Yoshiyama / Tanida, Shimei / Murata, Koichi / Shimizu, Takayoshi / Matsuda, Shuichi / Otsuki, Bungo

World neurosurgery

2024

Abstract: Objective: This study aimed to quantify the change in pressure on the cage during compression manipulation in lumbar interbody fusion. While the procedure involves applying compression between pedicle screws to press the cage against the endplate, the ... ...

Abstract	Objective: This study aimed to quantify the change in pressure on the cage during compression manipulation in lumbar interbody fusion. While the procedure involves applying compression between pedicle screws to press the cage against the endplate, the exact compression force remains elusive. We hypothesize that an intact facet joint might serve as a fulcrum, potentially reducing cage pressure. Methods: Pressure on the intervertebral disc cage was measured during compression manipulation in 4 donor cadavers undergoing lumbar interbody fusion. Unilateral facetectomy models with both normal and parallel compression and bilateral facetectomy models were included. A transforaminal lumbar interbody fusion cage with a built-in load cell measured the compression force. Results: Pressure data from 14 discs indicated a consistent precompression pressure average of 68.16 N. Following compression, pressures increased to 125.99 N and 140.84 N for normal and parallel compression postunilateral facetectomy, respectively, and to 154.58 N and 150.46 N for bilateral models. A strong linear correlation (correlation coefficient: 0.967, P < 0.0001) between precompression and postcompression pressures emphasized the necessity of sufficient precompression pressure for achieving desired postcompression outcomes. None of the data showed a decrease in compression force to the cage with the compression maneuver. Conclusions: Both normal and parallel compression maneuvers effectively increased the pressure on the cage, irrespective of the facet joint resection status. Compression manipulation consistently enhanced compressive force on the cage. However, when baseline pressure is low, the manipulation might not yield significant increases in compression force. This underlines the essential role of meticulous precompression preparation in enhancing surgical outcomes.
Language	English
Publishing date	2024-03-21
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2024.03.080
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Zs.A 1159: Show issues

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Article ; Online: The spontaneous restoration of the course of psoas muscles after corrective surgery for adult spinal deformity.

Tanida, Shimei / Fujibayashi, Shunsuke / Otsuki, Bungo / Matsuda, Shuichi

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association

2019 Volume 25, Issue 1, Page(s) 73–81

Abstract: Background: A previous study demonstrated that spinopelvic alignment and morphology influence a deviation in the course of psoas muscle (PM). However, it is unknown whether such deviations might be caused by a decrease in lumbar lordosis (LL) or the ... ...

Abstract	Background: A previous study demonstrated that spinopelvic alignment and morphology influence a deviation in the course of psoas muscle (PM). However, it is unknown whether such deviations might be caused by a decrease in lumbar lordosis (LL) or the lateral deviation of the lumbar spine following scoliosis. The purpose of this study was to elucidate the close relationship between the coronal and sagittal lumbar alignment and a deviation in the course of PM. Methods: We investigated the preoperative and postoperative spinopelvic parameters and the morphology of PM at L4/5 level in 30 patients treated with corrective surgery for adult spinal deformity who were diagnosed with "rising psoas sign" before surgery. Spinopelvic parameters were measured on X-ray films. Investigation of the morphology of PM and the morphological measurements were performed using computed tomography (CT) images. The "rising psoas sign" was classified as bilateral- or unilateral-type as defined in the previous study. Results: Among 18 patients who had bilateral-type rising psoas sign before surgery, 11 patients remained bilateral-type after surgery despite an increase in LL. The pelvic incidence of these 11 patients was significantly larger than that of the other 7 patients (53.5 ± 10.2° vs 43.2 ± 5.8°) (p = 0.037). The magnitude of postoperative increase in LL positively correlated with that of the posterior shift of PM (r = 0.41, p = 0.025). The degree of restoration of the lumbar spine following scoliosis was positively correlated with that of the medial shift of PM (r = 0.66, p = 0.025). Conclusion: The decrease in LL and the lateral deviation of lumbar spine following scoliosis caused a deviated course of the PM, which was spontaneously corrected by the restoration of lumbar alignment. However, the bilateral-type deviation in patients with higher pelvic incidence was considered to be within the range of normal variation.
MeSH term(s)	Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Lumbar Vertebrae/diagnostic imaging ; Lumbar Vertebrae/physiopathology ; Lumbar Vertebrae/surgery ; Male ; Middle Aged ; Orthopedic Procedures ; Psoas Muscles/diagnostic imaging ; Psoas Muscles/physiopathology ; Scoliosis/diagnostic imaging ; Scoliosis/physiopathology ; Scoliosis/surgery ; Thoracic Vertebrae/diagnostic imaging ; Thoracic Vertebrae/physiopathology ; Thoracic Vertebrae/surgery ; Tomography, X-Ray Computed
Language	English
Publishing date	2019-04-05
Publishing country	Japan
Document type	Journal Article
ZDB-ID	1314243-4
ISSN	1436-2023 ; 0949-2658
ISSN (online)	1436-2023
ISSN	0949-2658
DOI	10.1016/j.jos.2019.03.006
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Zs.A 4484: Show issues

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Article ; Online: Preserving the Pelvic Ring at the Sciatic Notch During Resection of Malignant Bone Tumors at the Posterior Ilium.

Sakamoto, Akio / Otsuki, Bungo / Tanida, Shimei / Fujibayashi, Shunsuke / Matsuda, Shuichi

Orthopaedic surgery

2020 Volume 12, Issue 6, Page(s) 2013–2017

Abstract: Resection of malignant bone tumors in the posterior ilium may result in pelvic ring disruption. Preserving the pelvic ring and keeping an adequate surgical margin is ideal, but is challenging, especially when the tumor extends to the sacroiliac joint. ... ...

Abstract	Resection of malignant bone tumors in the posterior ilium may result in pelvic ring disruption. Preserving the pelvic ring and keeping an adequate surgical margin is ideal, but is challenging, especially when the tumor extends to the sacroiliac joint. The current report proposes a line from the lateral point of the second sacral dorsal foramen to the anterior surface of sacral ala (S
MeSH term(s)	Aged ; Bone Neoplasms/surgery ; Humans ; Ilium/surgery ; Male ; Middle Aged ; Osteosarcoma/surgery ; Reconstructive Surgical Procedures/methods ; Sacroiliac Joint/surgery
Language	English
Publishing date	2020-10-11
Publishing country	Australia
Document type	Case Reports ; Journal Article
ZDB-ID	2503162-4
ISSN	1757-7861 ; 1757-7853 ; 1757-7861
ISSN (online)	1757-7861 ; 1757-7853
ISSN	1757-7861
DOI	10.1111/os.12783
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Zs.A 6786: Show issues

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Article ; Online: Remaining spine deformity after revision surgery for pelvic reconstruction and spinopelvic fixation: illustrative case.

Ito, Takayuki / Fujibayashi, Shunsuke / Otsuki, Bungo / Tanida, Shimei / Okamoto, Takeshi / Matsuda, Shuichi

Journal of neurosurgery. Case lessons

2021 Volume 2, Issue 2, Page(s) CASE21209

Abstract: Background: Pelvic deformity after resection of malignant pelvic tumors causes scoliosis. Although the central sacral vertical line (CSVL) is often used to evaluate the coronal alignment and determine the treatment strategy for scoliosis, it is not ... ...

Abstract	Background: Pelvic deformity after resection of malignant pelvic tumors causes scoliosis. Although the central sacral vertical line (CSVL) is often used to evaluate the coronal alignment and determine the treatment strategy for scoliosis, it is not clear whether the CSVL is a suitable coronal reference axis in cases with pelvic deformity. This report proposes a new coronal reference axis for use in cases with pelvic deformity and discusses the pathologies of spinal deformity remaining after revision surgery. Observations: A 14-year-old boy who had undergone internal hemipelvectomy and pelvic ring reconstruction 2 years prior was referred to our hospital with severe back pain. His physical and radiographic examinations revealed severe scoliosis with pelvic deformity. The authors planned a surgical strategy based on the CSVL and performed pelvic ring reconstruction using free vascularized fibula graft and spinopelvic fixation from L5 to the pelvis. After the procedure, although the patient's back pain was relieved, his scoliosis persisted. At the latest follow-up, his spinal deformity correction was acceptable with corset bracing. Therefore, the authors did not perform additional surgeries. Lessons: The CSVL may not be appropriate for evaluating coronal alignment in cases with pelvic deformity. Accurate preoperative planning is required to correct spinal deformities with pelvic deformity.
Language	English
Publishing date	2021-07-12
Publishing country	United States
Document type	Case Reports
ISSN	2694-1902
ISSN (online)	2694-1902
DOI	10.3171/CASE21209
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Article ; Online: Possible Association of Pedicle Screw Diameter on Pseudoarthrosis Rate After Transforaminal Lumbar Interbody Fusion.

Otsuki, Bungo / Fujibayashi, Shunsuke / Tanida, Shimei / Shimizu, Takayoshi / Murata, Koichi / Matsuda, Shuichi

World neurosurgery

2021 Volume 150, Page(s) e155–e161

Abstract: Background: Although pedicle screw sizes may affect the rate of bone union after lumbar fusion surgery, there is currently no supportive clinical evidence.: Methods: Eighty-five patients older than 50 years who underwent single-level L4/5 ... ...

Abstract	Background: Although pedicle screw sizes may affect the rate of bone union after lumbar fusion surgery, there is currently no supportive clinical evidence. Methods: Eighty-five patients older than 50 years who underwent single-level L4/5 transforaminal lumbar interbody fusion with posterior pedicle screw (PS) fixation were analyzed. Patients with factors that potentially inhibit bone fusion, such as Parkinson disease, were excluded. Bone union was assessed using computed tomography and dynamic radiographs 1 year after surgery. Explanatory factors considered included sex, age, smoking, bone density, material of the cage, PS diameter (PSD), relative PS length, theoretical maximum PSD (PSD Results: Nineteen levels were diagnosed as pseudoarthrosis. A multivariate logistic regression analysis identified a larger filling index (P = 0.016) and older age (P = 0.047) as risk factors for pseudoarthrosis. The Japanese Orthopaedic Association score 1 year after surgery and its recovery rate were significantly worse in patients with pseudoarthrosis than in those with fusion. Conclusions: The selection of an appropriately sized screw is important for achieving rigid fusion after transforaminal lumbar interbody fusion. Preoperative planning using multiplanar reconstruction computed tomography is an important approach for ensuring good clinical results.
MeSH term(s)	Age Factors ; Aged ; Bone and Bones/diagnostic imaging ; Case-Control Studies ; Female ; Humans ; Lumbar Vertebrae ; Lumbosacral Region ; Male ; Medical Errors ; Middle Aged ; Pedicle Screws/adverse effects ; Postoperative Complications/epidemiology ; Pseudarthrosis/epidemiology ; Pseudarthrosis/etiology ; Risk Factors ; Smoking ; Spinal Fusion/adverse effects ; Tomography, X-Ray Computed ; Treatment Outcome
Language	English
Publishing date	2021-03-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2021.02.117
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Zs.A 1159: Show issues

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Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

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Article ; Online: Rapid Spontaneous Resolution of Lumbar Intraspinal Facet Cyst after Lateral Lumbar Interbody Fusion.

Fujibayashi, Shunsuke / Otsuki, Bungo / Tanida, Shimei / Nagahara, Ryoichi / Ito, Hideo / Matsuda, Shuichi

Spine surgery and related research

2020 Volume 4, Issue 4, Page(s) 328–332

Abstract: Introduction: Intraspinal facet cysts resistant to conservative treatment are treated surgically. Surgical treatment was generally resection and decompression, but complications of dural tear and recurrence sometimes occurred. We present good clinical ... ...

Abstract	Introduction: Intraspinal facet cysts resistant to conservative treatment are treated surgically. Surgical treatment was generally resection and decompression, but complications of dural tear and recurrence sometimes occurred. We present good clinical results and rapid spontaneous resolution following treatment of five cases of lumbar intraspinal facet cyst after lateral lumbar interbody fusion (LLIF). Methods: Multicenter series of five cases of lumbar intraspinal facet cyst with segmental instability treated with LLIF. The cross-sectional area (CSA) of the thecal sac and facet cyst on T2-weighted axial magnetic resonance imaging and the distance of facet joint (FJ) gap on axial computed tomography were measured preoperatively and postoperatively. Patient data and clinical and radiographic results were described. Results: Of five patients, one was male and four were female, with an average age of 72.6 (61-76) years. The mean preoperative CSA of facet cyst was 40.09 mm Conclusions: LLIF may be indicated for intraspinal facet cysts with segmental instability.
Language	English
Publishing date	2020-07-10
Publishing country	Japan
Document type	Journal Article
ISSN	2432-261X
ISSN (online)	2432-261X
DOI	10.22603/ssrr.2020-0084
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Article ; Online: Association of two-staged surgery with systemic perioperative complications in lateral lumbar interbody fusion for adult spinal deformity: a propensity score-weighted study.

Masuda, Soichiro / Fujibayashi, Shunsuke / Takemoto, Mitsuru / Ota, Masato / Onishi, Eijiro / Odate, Seiichi / Tsutumi, Ryosuke / Izeki, Masanori / Kimura, Hiroaki / Tanida, Shimei / Otsuki, Bungo / Murata, Koichi / Shimizu, Takayoshi / Matsuda, Shuichi

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society

2023 Volume 32, Issue 3, Page(s) 950–956

Abstract: Purpose: Adult spinal deformity (ASD) surgery carries a higher risk of perioperative systemic complications. However, evidence for the effect of planned two-staged surgery on the incidence of perioperative systemic complications is scarce. Here, we ... ...

Abstract	Purpose: Adult spinal deformity (ASD) surgery carries a higher risk of perioperative systemic complications. However, evidence for the effect of planned two-staged surgery on the incidence of perioperative systemic complications is scarce. Here, we evaluated the effect of two-staged surgery on perioperative complications following ASD surgery using lateral lumbar interbody fusion (LLIF). Methods: The study was conducted under a retrospective multi-center cohort design. Data on 293 consecutive ASD patients (107 in the two-staged group and 186 in the one-day group) receiving corrective surgery using LLIF between 2012 and 2021 were collected. Clinical outcomes included occurrence of perioperative systemic complications, reoperation, and intraoperative complications, operation time, intraoperative blood loss, transfusion, and length of hospital stay. The analysis was conducted using propensity score (PS)-stabilized inverse probability treatment weighting to adjust for confounding factors. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated in a PS-weighted cohort. Results: In this cohort, 19 (18.4%) patients in the two-staged group and 43 (23.1%) patients in the one-day group experienced any systemic perioperative complication within 30 days following ASD surgery. In the PS-weighted cohort, compared with the patients undergoing one-day surgery, no association with the risk of systemic perioperative complications was seen in patients undergoing two-staged surgery (PS-weighted OR 0.78, 95% CI 0.37-1.63; p = 0.51). Conclusion: Our study suggested that two-staged surgery was not associated with risk for perioperative systemic complications following ASD surgery using LLIF.
MeSH term(s)	Humans ; Adult ; Propensity Score ; Postoperative Complications/epidemiology ; Postoperative Complications/etiology ; Retrospective Studies ; Blood Loss, Surgical ; Intraoperative Complications
Language	English
Publishing date	2023-01-21
Publishing country	Germany
Document type	Multicenter Study ; Journal Article
ZDB-ID	1115375-1
ISSN	1432-0932 ; 0940-6719
ISSN (online)	1432-0932
ISSN	0940-6719
DOI	10.1007/s00586-023-07539-1
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Zs.A 3437: Show issues

Location:
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Article ; Online: Salvage Oblique Lateral Interbody Fusion for Pseudarthrosis after Posterior/Transforaminal Lumbar Interbody Fusion: A Technical Note.

Masuda, Soichiro / Fujibayashi, Shunsuke / Kimura, Hiroaki / Tanida, Shimei / Otsuki, Bungo / Murata, Koichi / Shimizu, Takayoshi / Matsuda, Shuichi

World neurosurgery

2021 Volume 152, Page(s) 107–112

Abstract: Objective: This study aims to demonstrate the efficacy of salvage oblique lumbar interbody fusion (OLIF) surgery for pseudarthrosis after posterior/transforaminal lumbar interbody fusion (PLIF/TLIF).: Methods: The study group were patients with leg ... ...

Abstract	Objective: This study aims to demonstrate the efficacy of salvage oblique lumbar interbody fusion (OLIF) surgery for pseudarthrosis after posterior/transforaminal lumbar interbody fusion (PLIF/TLIF). Methods: The study group were patients with leg or back pain induced by pseudarthrosis after PLIF/TLIF. These patients underwent salvage OLIF surgeries in our institutions between July 2015 and Oct 2019. We retrospectively evaluated their clinical and radiographic outcomes. Results: Seven consecutive patients (all male; mean age 68.4 ± 9.3 years, range 53-81 years) were included in this study. There was no intraoperative complications in all cases. Six of 7 patients achieved bone union (at average 33.4 months follow-up) and had a successful postoperative course. Only 1 patient failed to gain bony fusion and required additional revision surgery due to progression of sagittal and coronal malalignment at 18 months after salvage OLIF surgery. Conclusions: The salvage OLIF approach was useful option for pseudarthrosis after PLIF/TLIF. It enabled us to build a rigid anterior support, allowed for extensive curettage of intervertebral scar tissue, and reduced the rate of the complications associated with dealing with posterior scar tissue.
MeSH term(s)	Aged ; Aged, 80 and over ; Female ; Humans ; Lumbar Vertebrae ; Male ; Middle Aged ; Postoperative Complications/etiology ; Postoperative Complications/surgery ; Pseudarthrosis/etiology ; Pseudarthrosis/surgery ; Salvage Therapy/methods ; Spinal Fusion/adverse effects ; Spinal Fusion/methods
Language	English
Publishing date	2021-06-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2021.06.020
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