Steven M. Kurtz
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View article: Hinge-Knee Megaprostheses Components Wear and Corrode: A Retrospective Study of 40 Devices
Hinge-Knee Megaprostheses Components Wear and Corrode: A Retrospective Study of 40 Devices Open
Introduction: Hinge-knee megaprostheses are frequently used in complex revision surgeries and are known to have higher complication and revision rates than primary total knee arthroplasties. However, the in vivo damage to the metal and pol…
View article: Optimization of fused filament fabrication process parameters to improve the compressive properties of PEEK and PEKK biomaterials
Optimization of fused filament fabrication process parameters to improve the compressive properties of PEEK and PEKK biomaterials Open
Fused filament fabrication (FFF) is increasingly being adopted to create polymeric orthopedic devices. FFF process parameters determine the mechanical performance of final printed parts; hence, optimizing for appropriate levels of strength…
View article: Rim Damage in Retrieved 1st and 2nd Generation Annealed Highly Crosslinked Polyethylene Hip Liners
Rim Damage in Retrieved 1st and 2nd Generation Annealed Highly Crosslinked Polyethylene Hip Liners Open
We analyzed the rim damage modes of retrieved 1st and 2nd generation-annealed HXLPE THA liners. We observed that the sequentially annealed liners had lower levels of damage as compared to annealed HXLPE liners. The clinical relevance of th…
View article: Cobalt-Chromium-Molybdenum Femoral Knee Implant Damage Correlates With Elevated Periprosthetic Metal Concentrations
Cobalt-Chromium-Molybdenum Femoral Knee Implant Damage Correlates With Elevated Periprosthetic Metal Concentrations Open
We (1) showed elevated periprosthetic tissue metal concentrations in TKA patients and (2) established a positive correlation between damage severity and subsequent metal release. Measured tissue metal concentrations approached the magnitud…
View article: Sensitivity of Lumbar Total Joint Replacement Contact Stresses Under Misalignment Conditions—Finite Element Analysis of a Spine Wear Simulator
Sensitivity of Lumbar Total Joint Replacement Contact Stresses Under Misalignment Conditions—Finite Element Analysis of a Spine Wear Simulator Open
A novel total joint replacement (TJR) that treats lumbar spine degeneration was previously assessed under Mode I and Mode IV conditions. In this study, we relied on these previous wear tests to establish a relationship between finite eleme…
View article: Is Lumbar Total Joint Arthroplasty Sensitive to Misalignment?
Is Lumbar Total Joint Arthroplasty Sensitive to Misalignment? Open
A novel total joint replacement (TJR) that treats lumbar spine degeneration was previously as-sessed under Mode I and Mode IV conditions. In this study, we relied on these previous wear tests to establish a relationship between finite elem…
View article: Wear, Material Transfer, and Electrocautery Damage Are Ubiquitous on <scp>CoCrMo</scp> Femoral Knee Retrievals
Wear, Material Transfer, and Electrocautery Damage Are Ubiquitous on <span>CoCrMo</span> Femoral Knee Retrievals Open
Despite high total knee arthroplasty (TKA) survivorship after 10 years (92%–99%), a gap persists where patient satisfaction lags clinical success. Additionally, while cobalt chrome molybdenum (CoCrMo) use decreases in primary total hip art…
View article: Development of PEKK and CF-PEKK Composite Bone Plates via 3D Printing and Pressing for Void Reduction and Improved Mechanical Strength
Development of PEKK and CF-PEKK Composite Bone Plates via 3D Printing and Pressing for Void Reduction and Improved Mechanical Strength Open
The search for innovative implant materials for orthopedics application has led to the exploration of advanced, high performing thermoplastics in the PAEK family. These materials have potential to overcome the drawbacks of traditional meta…
View article: Design Envelope for Future Acetabular Implant Reconstructions and Statistical Shape Model Based on 15th-90th Percentile Ranges of Male and Female CT Scans
Design Envelope for Future Acetabular Implant Reconstructions and Statistical Shape Model Based on 15th-90th Percentile Ranges of Male and Female CT Scans Open
Severe bone loss in the pelvis, caused by factors such as previous revision total hip surgery or cancer, presents significant surgical reconstruction challenges with high risks of complications like infection and implant failure. This stud…
View article: Titanium-Titanium Junctions in the Knee Corrode, Generating Damage Similar to the Hip
Titanium-Titanium Junctions in the Knee Corrode, Generating Damage Similar to the Hip Open
Each of the damage modes identified in modular titanium-titanium tibial junctions was previously reported by total hip arthroplasty retrieval studies. Cumulatively, our results suggest that mechanically assisted crevice corrosion promoted …
View article: Retrieval Analysis of Titanium Nitride Coatings for Orthopaedic Implants
Retrieval Analysis of Titanium Nitride Coatings for Orthopaedic Implants Open
The results of this study confirm the potential in vivo durability of early TiN coatings and will be useful in benchmarking wear tests for modern TiN-coated orthopaedic implants.
View article: Clinical management of bone loss in cervical total disc arthroplasty: literature review and treatment recommendations
Clinical management of bone loss in cervical total disc arthroplasty: literature review and treatment recommendations Open
Purpose Cervical total disc replacement (cTDR) has been established as an alternative treatment for degenerative cervical radiculopathy and myelopathy. While the rate of complications for cTDR is reasonably low, recent studies have focused…
View article: Investigating the Feasibility and Performance of Hybrid Overmolded UHMWPE 3D-Printed PEEK Structural Composites for Orthopedic Implant Applications: A Pilot Study
Investigating the Feasibility and Performance of Hybrid Overmolded UHMWPE 3D-Printed PEEK Structural Composites for Orthopedic Implant Applications: A Pilot Study Open
Ultra-high-molecular-weight polyethylene (UHMWPE) components for orthopedic implants have historically been integrated into metal backings by direct-compression molding (DCM). However, metal backings are costly, stiffer than cortical bone,…
View article: Exploring Biokinetics of Metal-Ion Release in Total Knee Arthroplasty
Exploring Biokinetics of Metal-Ion Release in Total Knee Arthroplasty Open
Total knee arthroplasty is a common treatment option for patients suffering from degenerative osteoarthritis. However, the patient satisfaction rate of this procedure remains a concern. The release of metal ions from the metallic implant m…
View article: Femoral Head Penetration Rates and Oxidation of Highly Cross-Linked Polyethylene Hip Liners Implanted More Than 10 Years
Femoral Head Penetration Rates and Oxidation of Highly Cross-Linked Polyethylene Hip Liners Implanted More Than 10 Years Open
Oxidation was found to be higher in the annealed HXLPE; however, this does not seem to be associated with greater wear as we found the average penetration rates for the cohorts were low, and the penetration rates were similar between the a…
View article: Exploring the mechanical strength, antimicrobial performance, and bioactivity of 3D-printed silicon nitride-PEEK composites in cervical spinal cages
Exploring the mechanical strength, antimicrobial performance, and bioactivity of 3D-printed silicon nitride-PEEK composites in cervical spinal cages Open
In this study, our goal was to assess the suitability of a polyether-ether-ketone (PEEK) and silicon nitride (Si3N4) polymer composite for antimicrobial three-dimensional (3D)-printed cervical cages. Generic cage designs (PEEK and 15…
View article: Complications and associated risk factors after surgical management of proximal femoral fractures
Complications and associated risk factors after surgical management of proximal femoral fractures Open
Aims This work aimed at answering the following research questions: 1) What is the rate of mechanical complications, nonunion and infection for head/neck femoral fractures, intertrochanteric fractures, and subtrochanteric fractures in the …
View article: In Vitro Wear of a Novel Vitamin E Crosslinked Polyethylene Lumbar Total Joint Replacement
In Vitro Wear of a Novel Vitamin E Crosslinked Polyethylene Lumbar Total Joint Replacement Open
Background: A novel, lumbar total joint replacement (TJR) design has been developed to treat degeneration across all three columns of the lumbar spine (anterior, middle, and posterior columns). Thus far, there has been no in vitro studies …
View article: What Are the Mortality, Infection, and Nonunion Rates After Periprosthetic Femoral Fractures in the United States?
What Are the Mortality, Infection, and Nonunion Rates After Periprosthetic Femoral Fractures in the United States? Open
Background Periprosthetic femoral fractures are a serious complication that put a high burden on patients. However, comprehensive analyses of their incidence, mortality, and complication rates based on large-registry data are scarce. Quest…
View article: In Vitro and In Vivo Evaluation of Ultrasound‐Triggered Release From Novel Spinal Device
In Vitro and In Vivo Evaluation of Ultrasound‐Triggered Release From Novel Spinal Device Open
Objectives Bacterial infection following spinal fusion is a major clinical concern with up to 20% incidence. An ultrasound‐triggered bulk‐release system to combat postsurgical bacterial survival was designed and evaluated. Methods Polylact…
View article: Proximal Humerus Fractures in the Elderly U.S. Population: A Cross-Sectional Study of Treatment Trends and Comparison of Complication Rates after Joint Replacement, Open Reduction and Internal Fixation, and Non-Surgical Management
Proximal Humerus Fractures in the Elderly U.S. Population: A Cross-Sectional Study of Treatment Trends and Comparison of Complication Rates after Joint Replacement, Open Reduction and Internal Fixation, and Non-Surgical Management Open
Proximal humerus fracture (PHF) treatment remains challenging. Multiple therapy options exist, and the optimal choice of management has been increasingly discussed in the literature. The aim of this study was to (1) analyze trends in the p…
View article: Proximal humerus fractures – epidemiology, comparison of mortality rates after surgical versus non-surgical treatment, and analysis of risk factors based on Medicare registry data
Proximal humerus fractures – epidemiology, comparison of mortality rates after surgical versus non-surgical treatment, and analysis of risk factors based on Medicare registry data Open
Aims The optimal choice of management for proximal humerus fractures (PHFs) has been increasingly discussed in the literature, and this work aimed to answer the following questions: 1) what are the incidence rates of PHF in the geriatric p…