Author

Ryoichi Kobayashi

Observed name: Kobayashi, Ryoichi

Institution: Isesaki Municipal Hospital

Observed institutions: Gunma University, Osaka City University, Isesaki Municipal Hospital

OpenAlex ID: A5111637952

Complications Associated With Spine Surgery in Patients Aged 80 Years or Older: Japan Association of Spine Surgeons with Ambition (JASA) Multicenter Study

2017 · Kazuyoshi Kobayashi, Shiro Imagama, et al. · Global Spine Journal · 92

Risk Factors for Delirium After Spine Surgery in Extremely Elderly Patients Aged 80 Years or Older and Review of the Literature: Japan Association of Spine Surgeons with Ambition Multicenter Study

2017 · Kazuyoshi Kobayashi, Shiro Imagama, et al. · Global Spine Journal · 58

Associations between neck and shoulder pain (called katakori in Japanese) and sagittal spinal alignment parameters among the general population

2012 · Daisuke Tsunoda, Yoichi Iizuka, et al. · Journal of Orthopaedic Science · 39

Distal Phalangeal Reconstruction for Recurrent Intraosseous Epidermoid Cyst of the Finger — a Case Report

2011 · Kazuya Kurosawa, Ryoichi Kobayashi, et al. · Hand Surgery · 15

A cadaveric study of the cervical nerve roots and spinal segments

2015 · Ryoichi Kobayashi, Haku Iizuka, et al. · European Spine Journal · 14

Effect of a reduction of the atlanto-axial angle on the cranio-cervical and subaxial angles following atlanto-axial arthrodesis in rheumatoid arthritis

2012 · Haku Iizuka, Yoichi Iizuka, et al. · European Spine Journal · 13

Trends in cervical laminoplasty and 30-day postoperative complications: 10-year results from a retrospective, multi-institutional study of 1095 patients

2023 · Eiji Takasawa, Yoichi Iizuka, et al. · European Spine Journal · 10

Risk Factor for Poor Patient Satisfaction After Lumbar Spine Surgery in Elderly Patients Aged Over 80 years

2020 · Tomohiro Hikata, Ken Ishii, et al. · Clinical Spine Surgery A Spine Publication · 9

The relationship between an intramedullary high signal intensity and the clinical outcome in atlanto-axial subluxation owing to rheumatoid arthritis

2013 · Haku Iizuka, Yoichi Iizuka, et al. · The Spine Journal · 9

Gorham disease of the lumbar spine with an abdominal aortic aneurysm: a case report

2013 · Yohei Kakuta, Haku Iizuka, et al. · The Spine Journal · 7

Characteristics of idiopathic atlanto-axial subluxation: a comparative radiographic study in patients with an idiopathic etiology and those with rheumatoid arthritis

2012 · Haku Iizuka, Yoichi Iizuka, et al. · European Spine Journal · 7

Giant schwannoma with extensive scalloping of the lumbar vertebral body treated with one-stage posterior surgery: a case report

2014 · Yoichi Iizuka, Haku Iizuka, et al. · Journal of Medical Case Reports · 5

A Retrospective Analysis of Subaxial Subluxation After Atlanto-axial Arthrodesis in Patients With Rheumatoid Arthritis Based on Annual Radiographs Obtained for 5 Years

2015 · Haku Iizuka, Yoichi Iizuka, et al. · Clinical Spine Surgery A Spine Publication · 4

Impact of hypertension in diabetes on surgical outcomes after cervical laminoplasty - a retrospective, multi-institutional study of 1002 patients

2025 · Yusuke Tomomatsu, Eiji Takasawa, et al. · European Spine Journal · 3

The clinical outcomes of atlanto-axial arthrodesis in patients with rheumatoid arthritis – Assessment according to the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ)

2017 · Haku Iizuka, Yoichi Iizuka, et al. · Journal of Orthopaedic Science · 2

The relationship between the degree of displacement of the atlas to axis and the clinical data in atlanto-axial subluxation due to rheumatoid arthritis

2017 · Haku Iizuka, Yoichi Iizuka, et al. · Archives of Orthopaedic and Trauma Surgery · 1

Retrospective review of 22 surgically treated adults with congenital anomalies of the upper cervical spine: a clinical and radiological review

2015 · Haku Iizuka, Yoichi Iizuka, et al. · European Spine Journal · 1

Works count: 18

Citation count: 289

H-index: 9

I10-index: 7