Deep learning-based screening for locomotive syndrome using single-camera walking video: Development and validation study.

Locomotive Syndrome (LS) is defined by decreased walking and standing abilities due to musculoskeletal issues. Early diagnosis is vital as LS can be reversed with appropriate intervention. Although diagnosing LS using standardized charts is straightforward, the labor-intensive and time-consuming nature of the process limits its widespread implementation.

The Contribution of Deleterious Rare Alleles in ENPP1 and Osteomalacia Causative Genes to Atypical Femoral Fracture.

Context: Atypical femoral fractures (AFFs) are very rare atraumatic or mild trauma fractures in the subtrochanteric region or femoral shaft. Some unique genetic variants in Asian populations might confer susceptibility to AFF, since the incidence of AFFs is higher in Asian populations.

Objective: Because rare variants have been found to be causative in some diseases and the roles of osteomalacia causative genes have not been reported, we investigated rare variants in genes causing abnormal mineralization.

Efficacy of lumbar orthoses after posterior lumbar interbody fusion-a prospective randomized study.

Background: Lumbosacral orthoses (LSOs) are used as standard care after lumbar fusion surgery though their efficacy is unknown. The purpose of this prospective randomized controlled study was to elucidate the clinical and radiographic efficacies of LSO treatment in patients who underwent posterior lumbar interbody fusion (PLIF) of less than 3 segments.

Methods: Seventy-three patients who underwent PLIF were randomly allocated to 3 groups: 1 with custom-made LSO with metallic stays (C group); 1 with ready-made LSO without metallic stays (R group), and 1 without LSO (N group).

Cost-effectiveness of lumbar fenestration surgery in the Japanese universal health insurance system.

Background: Healthcare costs are a global concern, and cost-effectiveness analyses of interventions have become important. However, data regarding cost-effectiveness are limited to a few medical fields. The purpose of our study was to examine the Japanese universal health insurance system cost per quality-adjusted life year (QALY) for lumbar fenestration surgery.

Responsiveness of the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire in lumbar surgery and its threshold for indicating clinically important differences.

Background Context: Introduced in 2007, the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire (JOABPEQ) has been widely used, but its psychometric properties have not been well studied.

Purpose: The objective of this study was to assess the responsiveness of the JOABPEQ in lumbar surgery and its threshold for indicating clinically important differences.

Study Design: This is a prospective study.

Impact of Cervical Sagittal Alignment on Axial Neck Pain and Health-related Quality of Life After Cervical Laminoplasty in Patients With Cervical Spondylotic Myelopathy or Ossification of the Posterior Longitudinal Ligament: A Prospective Comparative Study.

Study Design: This is prospective observational study.

Objective: To prospectively investigate the correlation among axial neck pain; a newly developed patient-based quality of life outcome measure, the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ); and cervical sagittal alignment after open-door laminoplasty for cervical myelopathy.

Summary Of Background Data: Many studies have focused on postoperative axial neck pain after laminoplasty.

Cost-effectiveness of posterior lumbar interbody fusion in the Japanese universal health insurance system.

Background: Globally, the cost-effectiveness of spinal surgery is becoming increasingly important. However, these data are limited to a few countries. The purpose of our study was to examine the cost/quality adjusted life year (cost/QALY) gained for posterior lumbar interbody fusion (PLIF) in the Japanese universal health insurance system.

Factors associated with patient satisfaction for PLIF: Patient satisfaction analysis.

Introduction: Posterior lumbar interbody fusion (PLIF) has produced satisfactory clinical outcomes; however, all previous reports have only included evaluations by surgeon-based methods. The purpose of this study was to investigate patient-based surgical outcomes and the factors associated with patient satisfaction for PLIF.

Methods: Patients who underwent PLIF for lumbar spondylolisthesis were reviewed (n=443).

Severe cervical flexion myelopathy with long tract signs: a case report and a review of literature.

Introduction: Hirayama disease, a type of cervical flexion myelopathy, is a rare neurological disease characterized by muscular atrophy of the forearms and hands. Generally, the pathology is limited to the gray matter of the anterior horns in the lower cervical spinal cord. However, in rare cases the damage can spread to the white matter and present as long tract signs.

The Relationship Between Cervical Degeneration and Global Spinal Alignment in Patients With Adult Spinal Deformity.

Objectives: To examine the relationship between cervical degeneration and spinal alignment by comparing patients with adult spinal deformity versus the control cohort.

Summary Of Background Data: The effect of degeneration on cervical alignment has been controversial.

Methods: Cervical and full-length spine radiographs of 57 patients with adult spinal deformity and 78 patients in the control group were reviewed.

Electrophysiological Study for Nerve Root Entrapment in Patients With Isthmic Spondylolisthesis.

Study Design: A case series study.

Objective: To investigate the electrophysiological location of nerve root entrapment in patients with isthmic spondylolisthesis.

Summary Of Background Data: Although the lesion of the nerve root in patients with isthmic spondylolisthesis has been thought to be located at the pars interarticularis due to proliferation of fibrous cartilage, there is no electrophysiological study in relation to this accomplished fact.

Prevalence, Concomitance, and Distribution of Ossification of the Spinal Ligaments: Results of Whole Spine CT Scans in 1500 Japanese Patients.

Study Design: Cross-sectional study.

Objective: To investigate the prevalence, concomitance, and distribution of various types of ossification of the spinal ligaments in healthy subjects using computed tomography (CT).

Summary Of Background Data: CT has better diagnostic accuracy for ossification of the spinal ligaments compared to plain radiography.

Patient-Based Surgical Outcomes of Posterior Lumbar Interbody Fusion: Patient Satisfaction Analysis.

Study Design: A retrospective study.

Objective: The purpose of this study was to investigate: (1) patient-based surgical outcomes of posterior lumbar interbody fusion (PLIF); (2) correlations between patient-based surgical outcomes and surgeon-based surgical outcomes; (3) factors associated with patient satisfaction.

Summary Of Background Data: There have been no reports of patient-based surgical outcomes of PLIF for lumbar spondylolisthesis.

Validity of the Japanese Orthopaedic Association scoring system based on patient-reported improvement after posterior lumbar interbody fusion.

Background Context: The Japanese Orthopaedic Association (JOA) scoring system is a physician-based outcome that has been used to evaluate treatment effectiveness after lumbar surgery. However, patient-centered evaluation becomes increasingly important. There is no study that has examined the relationship between the JOA scoring system and patients' self-reported improvement.

Age-related surgical outcomes of laminoplasty for cervical spondylotic myelopathy.

Study Design Retrospective clinical study. Objective To investigate the age-related surgical outcomes of laminoplasty. Methods One hundred patients who underwent an en bloc laminoplasty for cervical spondylotic myelopathy from 2004 to 2008 and were followed for at least 1 year were included in this study.

Factors affecting postoperative activities of daily living in patients with osteoporotic vertebral collapse with neurological deficits.

Surgical treatment of osteoporotic vertebral collapse (OVC) with neurological deficits presents significant clinical challenges because some patients have fragile bones and often have medical comorbidities, which affect the severity of osteoporosis. We hypothesized that clinical results of surgery in these patients depend on the extent of medical comorbidities that induce secondary osteoporosis. The aim of this study is to examine the effects of medical history and comorbidities on surgical outcomes for these patients, along with the factors that predict postoperative function in activities of daily living (ADL).

Posterior lumbar interbody fusion with total facetectomy for low-dysplastic isthmic spondylolisthesis: effects of slip reduction on surgical outcomes: clinical article.

Object: The management of isthmic spondylolisthesis remains controversial, especially with respect to reduction. There have been no reports regarding appropriate slip reduction. The purpose of this study was to investigate the following issues: (1) surgical outcomes of posterior lumbar interbody fusion (PLIF) with total facetectomy for low-dysplastic isthmic spondylolisthesis, including postoperative complications; (2) effects of slip reduction on surgical outcomes; and (3) appropriate slip reduction.

Neurological manifestations of thoracic myelopathy.

Introduction: Investigation of preoperative manifestations of thoracic myelopathy in a large population has not been reported. The aim of this study was to identify symptoms specific to anatomical pathology or compressed segments in thoracic myelopathy through investigation of preoperative manifestations.

Materials And Methods: Subjects were 205 patients [143 men, 62 women; mean age, 62.

Repeated adjacent-segment degeneration after posterior lumbar interbody fusion.

One of the most important sequelae affecting long-term results is adjacent-segment degeneration (ASD) after posterior lumbar interbody fusion (PLIF). Although several reports have described the incidence rate, there have been no reports of repeated ASD. The purpose of this report was to describe 1 case of repeated ASD after PLIF.

Postoperative deep surgical-site infection after instrumented spinal surgery: a multicenter study.

A retrospective survey revealed 37 cases (1.1%) of deep surgical-site infection (SSI) among 3,462 instrumented spinal surgeries between 2004 and 2008. Excluding 8 patients who were unclassifiable, we categorized 29 patients into 3 groups of similar backgrounds-thoracolumbar degenerative disease (the DEG group; n = 15), osteoporotic vertebral collapse (the OVC group; n = 10), and cervical disorders (the cervical group; n = 4)-and investigated the key to implant salvage.

Surgical outcomes of osteoporotic vertebral collapse: a retrospective study of anterior spinal fusion and pedicle subtraction osteotomy.

The purpose of this retrospective study was to demonstrate the surgical outcomes of anterior spinal fusion (ASF) and posterior subtraction osteotomy (PSO) for osteoporotic vertebral collapse (OVC). Forty patients who underwent surgery for OVC at the thoracolumbar junction with neurological deficits were included in this study. ASF was primarily chosen for patients without vertebral compression fracture at other levels, and PSO was chosen for patients with more severe kyphosis or with multiple vertebral fractures.

Surgical outcomes of posterior thoracic interbody fusion for thoracic disc herniations.

Introduction: Surgical strategy for thoracic disc herniation (TDH) remains controversial. We have performed posterior thoracic interbody fusion (PTIF) by bilateral total facetectomies with pedicle screw fixation. The objectives of this retrospective study are to demonstrate the surgical outcomes of PTIF for TDH.

Surgical treatment for osteoporotic vertebral collapse with neurological deficits: retrospective comparative study of three procedures--anterior surgery versus posterior spinal shorting osteotomy versus posterior spinal fusion using vertebroplasty.

Purpose: In general, osteoporotic vertebral collapse (OVC) with neurological deficits requires sufficient decompression of neural tissues to restore function level in activities of daily living (ADL). However, it remains unclear as to which procedure provides better neurological recovery. The primary purpose of this study was to compare neurological recovery among three typical procedures for OVC with neurological deficits.

Validity, reliability and responsiveness of the Japanese version of the Neck Disability Index.

Background: The Neck Disability Index (NDI) is one of the most widely used questionnaires for neck pain. The purpose of this study was to validate the Japanese NDI.

Methods: We performed two surveys with an 8-week interval in 130 patients with neck pain, radiculopathy and myelopathy.