Hamid Hassanzadeh
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View article: Impact of a novel patient-specific, patient-matched Bezier parametric curve rod platform on proximal junction biomechanics in an in silico thoracolumbar instrumented fusion model
Impact of a novel patient-specific, patient-matched Bezier parametric curve rod platform on proximal junction biomechanics in an in silico thoracolumbar instrumented fusion model Open
Purpose To evaluate the biomechanical performance of a novel Bezier surface-smoothed transition rod, and to compare it to conventional and stepped rods, focusing on correction capability, spinal stabilization, instrumentation and spinal lo…
View article: Current trends and perspectives of scoliosis research society travel fellows
Current trends and perspectives of scoliosis research society travel fellows Open
View article: Increased Time to Fixation After Traumatic Spinal Cord Injury Influenced by Race and Insurance Status
Increased Time to Fixation After Traumatic Spinal Cord Injury Influenced by Race and Insurance Status Open
Study Design Retrospective Cohort Study. Objectives Although the optimal timing of surgical intervention for traumatic spinal cord injury (TSCI) is controversial, early intervention has been recognized as being beneficial in several studie…
View article: Editors’ Introduction: Proximal Junctional Kyphosis After Deformity Correction Surgery
Editors’ Introduction: Proximal Junctional Kyphosis After Deformity Correction Surgery Open
The International Journal of Spine Surgery is honored to provide a special issue on the topic of proximal junctional kyphosis (PJK) in deformity surgery. Many spine surgeons are all too familiar with the occurrence of PJK without being fam…
View article: Prevention of Proximal Junctional Kyphosis Using Proximal Fixation Techniques
Prevention of Proximal Junctional Kyphosis Using Proximal Fixation Techniques Open
BACKGROUND: Adult spinal deformity (ASD) is a disorder characterized by abnormal curvature of the spine resulting from progressive degeneration of spinal elements. Although operative intervention for ASD is commonplace, it is associated wi…
View article: Review of the national usage of antibiotics in arthroplasty surgery: a need for evidence-based prescribing
Review of the national usage of antibiotics in arthroplasty surgery: a need for evidence-based prescribing Open
Introduction Surgical site infections (SSI) remain one of the most serious complications of arthroplasty surgery. The role of antibiotic prophylaxis in preventing SSI post-arthroplasty is well established. However, there is considerable he…
View article: Facial scars resulting from a transbuccal approach during osteosynthesis of a sagittal split osteotomy: A retrospective study
Facial scars resulting from a transbuccal approach during osteosynthesis of a sagittal split osteotomy: A retrospective study Open
The purpose of the current study was to assess the quality of facial linear scars. The Stony Brook Scar Evaluation Scale (SBSES) was developed and validated as a tool to assess postoperative scars. Postoperative facial scars were rated usi…
View article: Failure to Normalize Risk Profile of Spine Fusion Patients With Coronary Artery Disease Previously Treated With Percutaneous Stent Revascularization
Failure to Normalize Risk Profile of Spine Fusion Patients With Coronary Artery Disease Previously Treated With Percutaneous Stent Revascularization Open
BACKGROUND: The impact of an initially less invasive cardiac intervention on outcomes of future surgical spine procedures has been understudied; therefore, we sought to investigate the effect of coronary stents on postoperative outcomes in…
View article: No Difference in Two-Year Revisions Between Hybrid Fusion and Two-Level Anterior Discectomy and Fusion: A National Database Study
No Difference in Two-Year Revisions Between Hybrid Fusion and Two-Level Anterior Discectomy and Fusion: A National Database Study Open
Study Design Retrospective Cohort Objective This study utilized a large national database to compare two-year revision rates, in addition to complications and costs, of hybrid surgery (HS) compared to two-level anterior cervical discectomy…
View article: Osteoporosis is associated with increased minor complications following single level ALIF and PSIF: an analysis of 7,004 patients
Osteoporosis is associated with increased minor complications following single level ALIF and PSIF: an analysis of 7,004 patients Open
Osteoporosis is common in a nationally-representative Medicare database cohort. Pre-operative diagnosis of osteoporosis is associated with increased minor complications following ALIF and PSIF. Pre-operative osteoporosis treatment is not a…
View article: COVID-19 Significantly Impacted Hospital Length of Stay and Discharge Patterns for Adult Spinal Deformity Patients
COVID-19 Significantly Impacted Hospital Length of Stay and Discharge Patterns for Adult Spinal Deformity Patients Open
Study Design. Retrospective review. Objective. The primary aim was to compare length of stay (LOS) and discharge disposition of adult spinal deformity (ASD) patients undergoing surgery before and during the pandemic. Secondary aims were to…
View article: P79. The COVID-19 pandemic significantly impacted hospital length of stay and discharge patterns for ASD surgery
P79. The COVID-19 pandemic significantly impacted hospital length of stay and discharge patterns for ASD surgery Open
View article: Presence and Severity of Mental Illness Is Associated With Increased Risk of Postoperative Emergency Visits, Readmission, and Reoperation Following Outpatient ACDF: A National Database Analysis
Presence and Severity of Mental Illness Is Associated With Increased Risk of Postoperative Emergency Visits, Readmission, and Reoperation Following Outpatient ACDF: A National Database Analysis Open
Study Design: Retrospective cohort study. Objective: The purpose was to compare rates of postoperative ED visits, readmission, and reoperation between patients with and without preexisting mental illness undergoing outpatient anterior cerv…
View article: Outcomes of Same-Day Orthopedic Surgery: Are Spine Patients More Likely to Have Optimal Immediate Recovery From Outpatient Procedures?
Outcomes of Same-Day Orthopedic Surgery: Are Spine Patients More Likely to Have Optimal Immediate Recovery From Outpatient Procedures? Open
Despite the increase in riskier spine procedures, complications have decreased over the years. Surgeons should aim to continue to decrease inpatient spine complications to the level of other orthopedic surgeries.
View article: Chronic Opioid Use Following Lumbar Discectomy: Prevalence, Risk Factors, and Current Trends in the United States
Chronic Opioid Use Following Lumbar Discectomy: Prevalence, Risk Factors, and Current Trends in the United States Open
Chronic opioid use following primary lumbar discectomy has declined from 2010-2015. A variety of factors are associated with chronic opioid use. Preoperative recognition of some of these risk factors may aid in perioperative management and…
View article: Prevalence of Osteoporosis Treatment and Its Effect on Post-Operative Complications, Revision Surgery and Costs After Multi-Level Spinal Fusion
Prevalence of Osteoporosis Treatment and Its Effect on Post-Operative Complications, Revision Surgery and Costs After Multi-Level Spinal Fusion Open
Study Design: Retrospective cohort study. Objective: To study the prevalence of pre-operative osteoporosis treatment, and its effect on risk of ORC, revision surgery and costs in osteoporotic patients undergoing ≥3-level spinal fusion for …
View article: Complex Mandibular Reconstruction for Head and Neck Squamous Cell Carcinoma—The Ongoing Challenge in Reconstruction and Rehabilitation
Complex Mandibular Reconstruction for Head and Neck Squamous Cell Carcinoma—The Ongoing Challenge in Reconstruction and Rehabilitation Open
Large head and neck squamous cell carcinoma (HNSCC) tumors affecting the mandible require a versatile reconstruction to maintain form, function, and quality of life. Large defect reconstruction of soft and hard tissue in the head and neck …
View article: Hospital Payments Increase as Payments to Surgeons Decrease for Common Inpatient Orthopaedic Procedures
Hospital Payments Increase as Payments to Surgeons Decrease for Common Inpatient Orthopaedic Procedures Open
From 2010 to 2016, inflation-adjusted total net payments for 4 common orthopaedic surgical procedures increased markedly, as did payments to the US hospitals for these procedures. Payments to orthopaedic surgeons for these procedures decre…
View article: Health Care Resource Utilization in Commercially Insured Patients Undergoing Anterior Cervical Discectomy and Fusion for Degenerative Cervical Pathology
Health Care Resource Utilization in Commercially Insured Patients Undergoing Anterior Cervical Discectomy and Fusion for Degenerative Cervical Pathology Open
Study Design: Retrospective review of an administrative database. Objectives: The aim of our study was to investigate the distribution of spending for the entire episode of care among nonelderly, commercially insured patients undergoing el…
View article: Recent Preoperative Lumbar Epidural Steroid Injection Is an Independent Risk Factor for Incidental Durotomy During Lumbar Discectomy
Recent Preoperative Lumbar Epidural Steroid Injection Is an Independent Risk Factor for Incidental Durotomy During Lumbar Discectomy Open
Study Design: Retrospective review. Objective: To investigate the association between lumbar epidural steroid injection (LESI) and incidental durotomy (ID) in patients with a diagnosis of disc herniation undergoing a primary discectomy. Me…
View article: Incidence of perioperative medical complications and mortality among elderly patients undergoing surgery for spinal deformity: analysis of 3519 patients
Incidence of perioperative medical complications and mortality among elderly patients undergoing surgery for spinal deformity: analysis of 3519 patients Open
OBJECTIVE Using 2 complication-reporting methods, the authors investigated the incidence of major medical complications and mortality in elderly patients after surgery for adult spinal deformity (ASD) during a 2-year follow-up period. METH…
View article: Risk factors for revision surgery following primary adult spinal deformity surgery in patients 65 years and older
Risk factors for revision surgery following primary adult spinal deformity surgery in patients 65 years and older Open
OBJECTIVE Surgical correction of adult spinal deformity (ASD) is a complex undertaking with high revision rates. The elderly population is poorly studied with regard to revision surgery, yet senior citizens constitute a rapidly expanding s…
View article: G481(P) Insights into factors affecting childhood obesity in united kingdom migrants of south asian origin
G481(P) Insights into factors affecting childhood obesity in united kingdom migrants of south asian origin Open
Introduction Childhood obesity represents a significant threat to the health and wellbeing of future generations of adults in the United Kingdom (UK). Certain ethnic minorities including those of South Asian origin experience notably highe…