David W. Polly
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View article: Differential Diagnosis of Posterior Buttock Pain: A Conceptual Review Based on Topographic Localization of Pain, Is It Really the Sacroiliac Joint?
Differential Diagnosis of Posterior Buttock Pain: A Conceptual Review Based on Topographic Localization of Pain, Is It Really the Sacroiliac Joint? Open
Diagnosis and management of musculoskeletal pain in the lower back, buttock, and hip can be complex due to the multilayered muscular anatomy in this region. Each structure or functional group (ie, hip abductors) may present as a local pain…
View article: Use of an Expert Panel for Symptomatic Patients With Grade I Degenerative Lumbar Spondylolisthesis: A Randomized Clinical Trial
Use of an Expert Panel for Symptomatic Patients With Grade I Degenerative Lumbar Spondylolisthesis: A Randomized Clinical Trial Open
BACKGROUND AND OBJECTIVES: The appropriate utilization of lumbar fusion when performing laminectomy for lumbar spondylolisthesis is uncertain. The objective was to determine whether the use of a surgical expert review panel recommending fu…
View article: Prospective Real-Time Screw Placement Using O-Arm Navigation
Prospective Real-Time Screw Placement Using O-Arm Navigation Open
Background/Objectives: A variety of techniques for pedicle screw placement exist. Efficiency claims have varied, but limited data are available to support or refute these claims. Our goal was to study our screw placement efficiency, report…
View article: Prevalence & Economic Burden of Adult Spinal Deformity in a Large United States Commercial Payer Population
Prevalence & Economic Burden of Adult Spinal Deformity in a Large United States Commercial Payer Population Open
The burden of both operative and nonoperative care for ASD is large. Considerable opportunity exists for development of improved nonoperative treatment modalities to increase the value of ASD care by reducing the need for continued nonoper…
View article: The Bedrock technique with triangular titanium rods for spinopelvic fixation and sacroiliac joint fusion: is there a learning curve?
The Bedrock technique with triangular titanium rods for spinopelvic fixation and sacroiliac joint fusion: is there a learning curve? Open
Purpose The Bedrock technique involves fusion of the sacroiliac (SI) joint at the time of long construct spinal fusion extending to the pelvis. This is done with triangular titanium rods (TTR) placed parallel and cephalad to S2AI screws, r…
View article: Osteoporosis in Adult Patients Undergoing Spinal Reconstructive Surgery: Associated Complications and Management
Osteoporosis in Adult Patients Undergoing Spinal Reconstructive Surgery: Associated Complications and Management Open
Study Design Literature review. Objectives To provide an overview of the complications associated with and management strategies for adult patients with osteoporosis requiring spinal reconstructive surgery. Emphasis will be placed on scree…
View article: Pelvic Fixation in Adult Spinal Deformity: Complications, Controversies, and Future Directions
Pelvic Fixation in Adult Spinal Deformity: Complications, Controversies, and Future Directions Open
Study Design Narrative Review. Objective Pelvic fixation is a crucial technique in modern adult spinal deformity surgery, yet complications and failure rates remain high. Significant controversy exists regarding the type and number of poin…
View article: Distal junctional failure following pelvic instrumentation in spinal fusion: a novel classification system
Distal junctional failure following pelvic instrumentation in spinal fusion: a novel classification system Open
OBJECTIVE While traditional literature in adult spinal deformity (ASD) examining mechanical complications has focused on proximal junctional kyphosis and failure, distal junctional failure (DJF) of constructs ending at the sacrum with or w…
View article: Differences across various ideal lumbar lordosis measurement formulas for patient-specific sagittal alignment goals
Differences across various ideal lumbar lordosis measurement formulas for patient-specific sagittal alignment goals Open
OBJECTIVE Multiple studies in the past have developed equations to determine the ideal lumbar lordosis (ILL) in the sagittal plane. These equations differ but all look to accomplish the same goal of providing the surgeon with specific alig…
View article: Insertional torque and pullout strength of reinserted screws for sacroiliac joint fusion: Effects of implant dimensions, bone density, and tapping
Insertional torque and pullout strength of reinserted screws for sacroiliac joint fusion: Effects of implant dimensions, bone density, and tapping Open
Our findings provide evidence-based insight for optimizing implant selection and surgical technique in revision SIJ fusion procedures using screw fusion devices. Particularly, it is emphasized that both implant dimensions and patient-speci…
View article: AO Spine Clinical Practice Recommendations: Spinopelvic Fixation - What are the Key Items to Understand Performance?
AO Spine Clinical Practice Recommendations: Spinopelvic Fixation - What are the Key Items to Understand Performance? Open
Study Design Literature review with clinical recommendations. Objective To highlight important studies related to spinopelvic fixation and provide recommendations to practicing clinicians on interpretation and utilization of the evidence i…
View article: Bilateral transforaminal lumbar interbody fusion technique for correcting lumbosacral hemicurve
Bilateral transforaminal lumbar interbody fusion technique for correcting lumbosacral hemicurve Open
Background: The lumbosacral hemicurve in adult spinal deformity (ASD) is a compensatory mechanism attempting to balance the main curve. Previous reports have examined hemicurve correction via various techniques. Purpose: We examined periop…
View article: Porous Threaded Titanium Implant Screws have Higher Insertional Torque Compared to Standard Screws
Porous Threaded Titanium Implant Screws have Higher Insertional Torque Compared to Standard Screws Open
Purpose Posterior pelvic ring screw back out and loss of fixation may result from poor screw purchase, prevalent in geriatric pelvic ring injuries where the cancellous bone is often osteoporotic. To reduce screw back out, there has been in…
View article: Osseointegration and fixation opportunities of sacroiliac instrumentation: a preclinical evaluation in a large animal model
Osseointegration and fixation opportunities of sacroiliac instrumentation: a preclinical evaluation in a large animal model Open
Implant designs that provide osseointegration via ongrowth, ingrowth and through growth improve implant fixation.
View article: Removal of infected bone in-growth pelvic fixation implants and microcomputed tomography analysis of osseous integration: illustrative case
Removal of infected bone in-growth pelvic fixation implants and microcomputed tomography analysis of osseous integration: illustrative case Open
BACKGROUND A novel pelvic fixation screw fusion device (iFuse Bedrock Granite implant) was designed to promote bony fusion through self-harvesting fenestrations throughout the outer screw shank. Bone on-growth and in-growth using this desi…
View article: Opioid Use Prior to Adult Spine Deformity Correction Surgery is Associated With Worse Pre- and Postoperative Back Pain and Prolonged Opioid Demands
Opioid Use Prior to Adult Spine Deformity Correction Surgery is Associated With Worse Pre- and Postoperative Back Pain and Prolonged Opioid Demands Open
Study Design Prospective multicenter database post-hoc analysis. Objectives Opioids are frequently prescribed for painful spinal conditions to provide pain relief and to allow for functional improvement, both before and after spine surgery…
View article: A Novel Surgical Indication for Scheuermann’s Kyphosis
A Novel Surgical Indication for Scheuermann’s Kyphosis Open
Scheuermann kyphosis can be treated surgically to restore proper sagittal alignment. Thoracic curves >70° are typically indicated for surgical intervention. However, patients who have reached their natural limit of compensatory lumbar hype…
View article: Does A Hinged Operating Table Facilitate Sagittal Correction in Transforaminal Lumbar Interbody Fusion With Smith-Peterson Osteotomy? A Radiographic Analysis
Does A Hinged Operating Table Facilitate Sagittal Correction in Transforaminal Lumbar Interbody Fusion With Smith-Peterson Osteotomy? A Radiographic Analysis Open
Background Osteotomies allow the restoration of appropriate sagittal alignment; however, closure of osteotomies can be challenging. Typical closure involves compressing pedicle screw heads across the rods, potentially causing screw looseni…
View article: Estimating the Cost of Spinopelvic Complications After Adult Spinal Deformity Surgery
Estimating the Cost of Spinopelvic Complications After Adult Spinal Deformity Surgery Open
A conservative estimate of the cost of spinopelvic failures after ASD surgery is substantial, nearly $1 billion over 5-years. We propose a method of capturing spinopelvic fixation failures for use in future clinical studies and cost analys…
View article: Minimally Invasive SI Joint Fusion Procedures for Chronic SI Joint Pain: Systematic Review and Meta-Analysis of Safety and Efficacy
Minimally Invasive SI Joint Fusion Procedures for Chronic SI Joint Pain: Systematic Review and Meta-Analysis of Safety and Efficacy Open
BACKGROUND: Sacroiliac (SI) joint fusion is increasingly used to treat chronic SI joint pain. Multiple surgical approaches are now available. METHODS: Data abstraction and random effects meta-analysis of safety and efficacy outcomes from p…
View article: Chance Fracture Pattern Presenting in Proximal Junctional Failure
Chance Fracture Pattern Presenting in Proximal Junctional Failure Open
Introduction: We present a case series of proximal junctional failure due to a Chance-type fracture. Methods: This is a retrospective review of patients who developed proximal junctional kyphosis because of Chance-type proximal junctional …
View article: Stability and Instrumentation Stresses Among Sacropelvic Fixation Techniques With Novel Porous Fusion/Fixation Implants: A Finite Element Study
Stability and Instrumentation Stresses Among Sacropelvic Fixation Techniques With Novel Porous Fusion/Fixation Implants: A Finite Element Study Open
Not applicable (basic science study).
View article: The Diagnostic Process of Spinal Post-traumatic Deformity
The Diagnostic Process of Spinal Post-traumatic Deformity Open
Study Design: Survey of cases. Objective: To evaluate the opinion of experts in the diagnostic process of clinically relevant Spinal Post-traumatic Deformity (SPTD). Summary of Background Data: SPTD is a potential complication of spine tra…