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Bliven EK, Fung A, Baker A, Fleps I, Ferguson SJ, Guy P, Helgason B, Cripton PA. How accurately do finite element models predict the fall impact response of ex vivo specimens augmented by prophylactic intramedullary nailing? J Orthop Res 2024. [PMID: 39354743 DOI: 10.1002/jor.25984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 08/07/2024] [Accepted: 09/17/2024] [Indexed: 10/03/2024]
Abstract
Hip fracture prevention approaches like prophylactic augmentation devices have been proposed to strengthen the femur and prevent hip fracture in a fall scenario. The aim of this study was to validate the finite element model (FEM) of specimens augmented by prophylactic intramedullary nailing in a simulated sideways fall impact against ex vivo experimental data. A dynamic inertia-driven sideways fall simulator was used to test six cadaveric specimens (3 females, 3 males, age 63-83 years) prophylactically implanted with an intramedullary nailing system used to augment the femur. Impact force measurements, pelvic deformation, effective pelvic stiffness, and fracture outcomes were compared between the ex vivo experiments and the FEMs. The FEMs over-predicted the effective pelvic stiffness for most specimens and showed variability in terms of under- and over-predicting peak impact force and pelvis compression depending on the specimen. A significant correlation was found for time to peak impact force when comparing ex vivo and FEM data. No femoral fractures were found in the ex vivo experiments, but two specimens sustained pelvic fractures. These two pelvis fractures were correctly identified by the FEMs, but the FEMs made three additional false-positive fracture identifications. These validation results highlight current limitations of these sideways fall impact models specific to the inclusion of an orthopaedic implant. These FEMs present a conservative strategy for fracture prediction in future applications. Further evaluation of the modelling approaches used for the bone-implant interface is recommended for modelling augmented specimens, alongside the importance of maintaining well-controlled experimental conditions.
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Affiliation(s)
- Emily K Bliven
- School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, Canada
| | - Anita Fung
- Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | | | - Ingmar Fleps
- Skeletal Mechanobiology & Biomechanics Laboratory, Department of Mechanical Engineering, Boston University, Boston, Massachusetts, USA
| | | | - Pierre Guy
- Division of Orthopaedic Trauma, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
- Centre for Aging SMART, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Peter A Cripton
- School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, Canada
- Centre for Aging SMART, University of British Columbia, Vancouver, British Columbia, Canada
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Rougereau G, Bourdier JA, Langlais T, Boisrenoult P, Pujol N. Is there a femoral morphology at risk of a cervical or pertrochanteric fracture? Description and validation of the "Neck shaft ratio" and the "Intertrochanteric distal ratio" after analyzing a continuous cohort of 126 bilateral fractures of the proximal femur. Orthop Traumatol Surg Res 2024; 110:103874. [PMID: 38556208 DOI: 10.1016/j.otsr.2024.103874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/24/2023] [Accepted: 02/07/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND Proximal femur fractures constitute a public health concern given their high frequency and the aging population. The frequency of a contralateral fracture occurring can reach up to 15% of cases. Certain historical or demographic factors constitute risk factors for refracture, but the type of fracture, either of the femoral neck (FN) or pertrochanteric (PT), cannot be predicted. The objectives of this retrospective study were: firstly, to analyze several anatomical markers in order to determine whether they predispose to a certain type of fracture in the event of contralateral refracture, and secondly, to determine the predictive power of these possible radiological markers for the type of contralateral fracture. HYPOTHESIS The hypothesis was that the "Neck shaft ratio" (NSR) and the "Intertrochanteric distal ratio" (ITDR) made it possible to determine a proximal femoral morphology at risk of FN and/or PT fracture in the event of a second fracture. MATERIAL AND METHODS This continuous retrospective single-center series from January 2011 to December 2019 of patients who presented with bilateral fractures of the proximal femurs was analyzed. Radiographs, taken after the first fracture, of the contralateral femur were studied. Morphological measurements previously described in the literature were carried out as well as the NSR (ratio of the medial cortical thicknesses of the femoral neck at its narrowest and basicervical level) and the ITDR (ratio of the medial diaphyseal cortical thicknesses at 5mm and 20mm from the distal portion of the lesser trochanter). One hundred and twenty-six patients were included: 46/126 (36.5%) had bilateral FN, 50/126 (39.7%) bilateral PT and 30/126 (23.8%) one of each. RESULTS Only NSR and ITDR were significant predictive measures for FN or PT fracture type [0.54±0.11 vs. 0.81±0.16 (p<0.0001) and 0. 85±0.1 vs. 0.68±0.1 (p<0.0001), respectively]. These two ratios had an excellent predictive value for the type of fracture occurring on the contralateral side [NSR: AUC ROC = 0.91 (95% CI; 0.86-0.96); ITDR: AUC ROC = 0.81 (95% CI; %, 0.74-0.89)]. The NSR had excellent intra- and inter-observer reproducibility with an interclass correlation coefficient of 0.93 [95% CI: 0.86-0.97] and 0.91 [95% CI: 0.82-0.96] respectively, the same also applied for the ITDR with interclass correlation coefficient values of 0.93 [95% CI: 0.87-0.97] and 0.86 [95% CI: 0.73-0.93] respectively. DISCUSSION The NSR and ITDR ratios offer a simple and reproducible means to predict a morphological predisposition to a certain fracture type, respectively an FN and PT on the side contralateral to an initial osteoporotic proximal femur fracture. A prospective cohort study would be useful in defining a possible prognostic nature on the occurrence and/or time until refracture. LEVEL OF EVIDENCE III; retrospective control case.
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Affiliation(s)
- Grégoire Rougereau
- Service de chirurgie orthopédique et traumatologique, Hôpital Mignot, Université Versailles Saint-Quentin-en-Yvelines, Centre hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay-Rocquencourt, France; Service de chirurgie orthopédique, Université Sorbonne, Hôpital de la Pitié Salpêtrière, 47-83, boulevard de l'Hôpital, 75013 Paris, France.
| | - Jean-Arthur Bourdier
- Service de chirurgie orthopédique et traumatologique, Hôpital Mignot, Université Versailles Saint-Quentin-en-Yvelines, Centre hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay-Rocquencourt, France
| | - Tristan Langlais
- Service de chirurgie orthopédique, Université de Toulouse, Hôpital des enfants Purpan, 330, avenue de Grande Bretagne, 31300 Toulouse, France
| | - Philippe Boisrenoult
- Service de chirurgie orthopédique et traumatologique, Hôpital Mignot, Université Versailles Saint-Quentin-en-Yvelines, Centre hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay-Rocquencourt, France
| | - Nicolas Pujol
- Service de chirurgie orthopédique et traumatologique, Hôpital Mignot, Université Versailles Saint-Quentin-en-Yvelines, Centre hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay-Rocquencourt, France
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Koirala N, Joshi J, Duffy SF, McLennan G. Percutaneous-Reinforced Osteoplasty: A Review of Emerging Treatment Strategies for Bone Interventions. J Clin Med 2022; 11:jcm11195572. [PMID: 36233434 PMCID: PMC9571370 DOI: 10.3390/jcm11195572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/11/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
Percutaneous-reinforced osteoplasty is currently being investigated as a possible therapeutic procedure for fracture stabilization in high-risk patients, primarily in patients with bone metastases or osteoporosis. For these patients, a percutaneous approach, if structurally sound, can provide a viable method for treating bone fractures without the physiologic stress of anesthesia and open surgery. However, the low strength of fixation is a common limitation that requires further refinement in scaffold design and selection of materials, and may potentially benefit from tissue-engineering-based regenerative approaches. Scaffolds that have tissue regenerative properties and low inflammatory response promote rapid healing at the fracture site and are ideal for percutaneous applications. On the other hand, preclinical mechanical tests of fracture-repaired specimens provide key information on restoration strength and long-term stability and enable further design optimization. This review presents an overview of percutaneous-reinforced osteoplasty, emerging treatment strategies for bone repair, and basic concepts of in vitro mechanical characterization.
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Affiliation(s)
- Nischal Koirala
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH 44115, USA
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Jyotsna Joshi
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH 44115, USA
| | - Stephen F. Duffy
- Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH 44115, USA
| | - Gordon McLennan
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH 44195, USA
- Correspondence:
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Reynders-Frederix P, Schiopu D, Malissard M, Jayankura M, Sibilla F, Le Huec JC. Pilot study: To assess feasibility and tolerability of a minimal invasive implantable PEEK device for prevention of contralateral osteoporotic hip fracture. Acta Orthop Belg 2022; 88:11-16. [PMID: 35512149 DOI: 10.52628/88.1.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A non-comparative multi-centre and international pilot study have been carried on Y-STRUT® (Hyprevention, France), an implantable medical device meant to reinforce the hip to reduce the risk of a contralateral hip fracture. Objectives of the study were to determine the feasibility and tolerance of the procedure. Methods Patients older than 60 years were recruited when presenting at the emergency departments with a low-energy pertrochanteric fracture on one side and with a fracture risk assessed for the contralateral side with BMD, T-Score or other bone quality evaluation tool, FRAX index, or fall risk assessment. Pain and functional ability were assessed at the different follow-up visits using VAS, WOMAC and OHS-12 scores. Results Twelve patients were included and reached a one-year follow-up. Mean age was 82 years old (65 - 91). The average hospital stay was 13 days (3 - 29). The prophylactic surgery did not delay the hospital discharge for any patient. The procedure did not lead to unresolvable serious adverse events. At 3 weeks, all patients were able to walk 6 meters, half of them in less of 30 seconds. Minimal pain was reported all along the follow-up visits, except at 3 years when one patient presented high pain in both hips. WOMAC and OHS-12 scores showed a moderate to mild hip impairment. Conclusion The good short and medium-term outcomes of this pilot study demonstrate the feasibility and the tolerability of the device. Further studies should focus on the efficacy of this immediate and lasting bone reinforcement technique.
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Van Haecke A, Viste A, Desmarchelier R, Roy P, Mercier M, Fessy MH. Incidence and risk factors for bilateral proximal femoral fractures. Orthop Traumatol Surg Res 2022; 108:102887. [PMID: 33711506 DOI: 10.1016/j.otsr.2021.102887] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 09/06/2020] [Accepted: 09/18/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Proximal femoral fractures (PFFs) are a public health issue due to their high frequency. The frequency of a second PFF on the other side is estimated at 10%. This estimation is controversial, however, and the risk factors have not been evaluated in a large population of French patients. The objective of this retrospective case-control study was to determine: (1) the incidence of second PFFs and (2) their risk factors. HYPOTHESIS The incidence of second PFFs is >2% after 1 year and >5% after 3 years. MATERIAL AND METHODS We conducted a case-control study in a population of consecutive patients managed surgically for PPF at the Lyon Sud Hospital between 2013 and 2014. We analysed the following clinical factors: age, sex, body mass index (BMI), institutionalisation, the Parker score, the American Society of Anesthesiologists score (ASA), comorbidities, and the use of psychoactive drugs. RESULTS We included 474 PFFs (trochanter, n=240 and neck, n=234) of which 36 were bilateral. The contralateral fracture occurred within 1 year of the first fracture in 6/474 (1.3%) cases and within 3 years in all 36 cases (7.6%). The case-control study comprised 49 cases with bilateral PFF and 161 controls with no second hip fracture within 3 years. Risk factors for a second hip fracture were age older than 90 years (odds ratio [OR]=5.44; 95% confidence interval [95%CI], 112-2642 (p=0.002)) and a history of heart disease (OR, 2.18; 95%CI, 1.06-4.47 [p=0.03]). A Parker score≥6 was protective (OR, 0.84; 95%CI, 0.71-0.99 [p=0.03]). Mortality after 3 years was 42% (201/474), and 13% (63/474) of patients were lost to follow-up. DISCUSSION Age older than 90 years, a Parker score below 6, and a history of heart disease are risk factors for a second PFF within 3 years after the first PFF. LEVEL OF EVIDENCE III; case-control study.
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Affiliation(s)
- Adrien Van Haecke
- Hospices Civils de Lyon, Hôpital Lyon Sud, Service de Chirurgie Orthopédique et Traumatologique, 165 Chemin du Grand Revoyet, Pierre Bénite Cedex, France; Université de Lyon, Université Claude Bernard Lyon 1, Université Gustave Eiffel, IFSTTAR, LBMC UMRT_9406, Lyon, France
| | - Anthony Viste
- Hospices Civils de Lyon, Hôpital Lyon Sud, Service de Chirurgie Orthopédique et Traumatologique, 165 Chemin du Grand Revoyet, Pierre Bénite Cedex, France; Université de Lyon, Université Claude Bernard Lyon 1, Université Gustave Eiffel, IFSTTAR, LBMC UMRT_9406, Lyon, France.
| | - Romain Desmarchelier
- Hospices Civils de Lyon, Hôpital Lyon Sud, Service de Chirurgie Orthopédique et Traumatologique, 165 Chemin du Grand Revoyet, Pierre Bénite Cedex, France
| | - Pascal Roy
- Université de Lyon, Université Claude Bernard Lyon 1, Université Gustave Eiffel, IFSTTAR, LBMC UMRT_9406, Lyon, France; CNRS UMR 5558, Laboratoire de Biométrie et Biologie Évolutive, Équipe Biostatistique- Santé, Villeurbanne, France
| | - Marcelle Mercier
- Hospices Civils de Lyon, Hôpital Lyon Sud, Service de Chirurgie Orthopédique et Traumatologique, 165 Chemin du Grand Revoyet, Pierre Bénite Cedex, France
| | - Michel-Henri Fessy
- Hospices Civils de Lyon, Hôpital Lyon Sud, Service de Chirurgie Orthopédique et Traumatologique, 165 Chemin du Grand Revoyet, Pierre Bénite Cedex, France; Université de Lyon, Université Claude Bernard Lyon 1, Université Gustave Eiffel, IFSTTAR, LBMC UMRT_9406, Lyon, France
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Roux C, Tselikas L, Delpla A, Yevich S, Teriitehau C, Hakime A, Varin E, Kobe A, de Baère T, Deschamps F. Percutaneous fixation of impending fracture of the hip. Tech Vasc Interv Radiol 2022; 25:100802. [DOI: 10.1016/j.tvir.2022.100802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shaul JL, Hill RS, Bouxsein ML, Burr DB, Tilton AK, Howe JG. AGN1 implant material to treat bone loss: Resorbable implant forms normal bone with and without alendronate in a canine critical size humeral defect model. Bone 2022; 154:116246. [PMID: 34744020 DOI: 10.1016/j.bone.2021.116246] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 11/02/2022]
Abstract
BACKGROUND Fractures secondary to osteoporosis, particularly those of the hip and spine, are a major public health concern with high social and economic costs. The Local Osteo-Enhancement Procedure (LOEP) is an approach intended to strengthen skeletal areas that are at the highest risk for fracture due to osteoporosis. LOEP involves the implantation of AGN1, a triphasic, calcium-based, osteoconductive material which is then resorbed and replaced by bone. Since alendronate is the most prescribed osteoporotic treatment, the purpose of this canine study is to determine if the newly formed bone has the same properties as normal bone and whether alendronate treatment impacts AGN1 resorption and replacement with bone. METHODS Sixty skeletally mature male hounds (24-38 kg) were evenly divided between alendronate (0.2 mg/kg/day) and non-alendronate treatment groups. A critical-size core bone defect created in one proximal humerus was implanted with AGN1 while the contralateral non-operated humerus served as a paired control in each animal. Animals were sacrificed 13, 26, and 52 weeks post-operatively (10 per treatment per timepoint). The control and treatment site bone specimens from each animal were examined using radiographic, histomorphometric, and biomechanical techniques. Results between alendronate-treated and non-alendronate-treated animals were compared as groups. RESULTS AGN1 implant material was consistently resorbed and replaced by bone in all animals. At 52 weeks, only minimal residual implant material could be detected (0.9 ± 2.3% non-alendronate group; 2.2 ± 3.1% alendronate group), and new bone filled the defects in both the non-alendronate and alendronate groups. At 13 and 26 weeks, microCT revealed the newly formed bone in the defects had significantly higher trabecular bone volume and number connectivity than control bone in both groups. Mechanical testing demonstrated that the new bone had ultimate compressive strength and modulus equivalent to control bone as early as 13 weeks post-surgery which was maintained to 52 weeks in both groups. CONCLUSIONS In this canine critical-sized humeral core defect model, AGN1 was progressively replaced by normal bone as evaluated by all outcome measures. Concurrent alendronate therapy did not significantly impact AGN1 resorption or new bone formation. These results demonstrate that AGN1 can be used in conjunction with alendronate in non-osteoporotic animals. CLINICAL RELEVANCE This study suggests that the AGN1 implant material demonstrates potential for local restoration of bone in critical-size core defects, and that the material is compatible with alendronate drug therapy. Further studies will be required to determine if these results apply to other osteoporosis medications.
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Affiliation(s)
| | - Ronald S Hill
- AgNovos Healthcare, Rockville, MD, United States of America
| | - Mary L Bouxsein
- Beth Israel Deaconess Medical Center, Boston, MA, United States of America
| | - David B Burr
- Indiana University, Indianapolis, IN, United States of America
| | | | - James G Howe
- AgNovos Healthcare, Rockville, MD, United States of America; University of Vermont, Burlington, VT, United States of America
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LaMonica JN, Rhee B, Milligan K, Leslie M, Tommasini SM, Wiznia DH. Finite Element Evaluation of the Femoral Neck System as Prophylactic Fixation to Prevent Contralateral Hip Fractures. Geriatr Orthop Surg Rehabil 2022; 13:21514593221135117. [DOI: 10.1177/21514593221135117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/12/2022] Open
Abstract
Introduction Hip fractures cause significant morbidity and mortality for geriatric patients, and incidence is increasing as the population ages. Following a primary hip fracture, up to 20% may suffer a contralateral hip fracture within 5 years despite fracture risk reduction measures, including fall prevention and osteoporosis pharmacologic treatment. The aim of this study is to assess whether insertion of the Femoral Neck System (Depuy Synthes, West Chester, PA) into the contralateral proximal femur may strengthen the bone and decrease the incidence of contralateral hip fractures. Materials and Methods ScanIP, an image processing software was used to produce 3-dimensional models of a cadaver femur with the implanted device. Models were meshed and exported to Abaqus for finite element analysis to evaluate the device’s ability to reduce stress in the proximal femur. Results were analyzed for element-wise volume and von-Mises stresses. Results The implant reduced peak stress and bone failure at all levels of bone quality. Specifically in osteoporotic bone, the implant decreased peak stress by 27%, proximal femur trabecular bone failure by 5% and cortical bone failure by 100% in the femoral neck. Conclusions Our results from computer generated finite element analyses indicate that the Femoral Neck System may strengthen an osteoporotic proximal femur in the event of a lateral fall. Further investigation with expanded finite element analysis and cadaveric biomechanical studies are needed to validate these results.
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Affiliation(s)
- Julia N. LaMonica
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
- Quinnipiac University, Frank H. Netter M.D. School of Medicine, North Haven, CT, USA
| | - Brian Rhee
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
| | - Kenneth Milligan
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
| | - Michael Leslie
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
| | - Steven M. Tommasini
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
| | - Daniel H. Wiznia
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
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Prophylactic augmentation implants in the proximal femur for hip fracture prevention: An in silico investigation of simulated sideways fall impacts. J Mech Behav Biomed Mater 2021; 126:104957. [PMID: 34861519 DOI: 10.1016/j.jmbbm.2021.104957] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/02/2021] [Accepted: 11/07/2021] [Indexed: 12/26/2022]
Abstract
Femoral fractures from sideways falls in the elderly are associated with significant rates of morbidity and mortality. Approaches to prevent these catastrophic injuries include pharmacological treatments, which have limited efficacy. Prophylactic femoral augmentation systems are a promising alternative that are gaining prominence by addressing the most debilitating osteoporosis-related fracture. We have developed finite element models (FEMs) of a novel experimental sideways fall simulator for cadavers. By virtue of the range of specimens and injury outcomes, these FEMs are well-suited to the evaluation of such implants. The purpose of this study was to use the FEMs to evaluate the mechanical effectiveness of three different prophylactic femoral augmentation systems. Models of the Y-Strut® (Hyprevention®, Pessac, France), Gamma Nail® (Stryker, Kalamazoo, USA), and a simple lag screw femoral fracture implant systems were placed into FEMs of five cadaveric pelvis-femur constructs embedded in a soft tissue surrogate, which were then subject to simulated sideways falls at seven impact velocities. Femur-only FEMs were also evaluated. Peak impact forces and peak acetabular forces were examined, and failure was evaluated using a strain-based criterion. We found that the femoral augmentation systems increased the peak forces prior to fracture, but were unable to prevent fracture for severe impacts. The Gamma Nail® system consistently produced the largest strength increases relative to the unaugmented femur for all five specimens in both the pendulum-drop FEMs and the femur-only simulations. In some cases, the same implant appeared to cause fractures in the acetabulum. The femur-only FEMs showed larger force increases than the pendulum-drop simulations, which suggests that the results of the femur-only simulations may not represent sideways falls as accurately as the soft tissue-embedded pendulum-drop simulations. The results from this study demonstrate the ability to simulate a high energy phenomenon and the effect of implants in an in silico environment. The results also suggest that implants could increase the force applied to the proximal femur during impact. Fracture outcomes from the tested implants can be used to inform the design of future devices, which reaffirms the value of modelling with biofidelic considerations in the implant design process. To the authors' knowledge, this is the first paper to use more complex biofidelic FEMs to assess prophylactic femoral augmentation methods.
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Lim KT, Choi WJ. The effect of the hip impact configuration on the energy absorption provided by the femoral soft tissue during sideways falls. J Biomech 2021; 117:110254. [PMID: 33493711 DOI: 10.1016/j.jbiomech.2021.110254] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/12/2020] [Accepted: 01/10/2021] [Indexed: 12/26/2022]
Abstract
The femoral soft tissue (i.e., skin, muscle, fat) may play a key role in preventing hip fractures during a fall by absorbing the impact energy. We measured the femoral soft tissue deformation and associated compressive force during simulated sideways falls to estimate the energy absorbed by the soft tissue, and then examined how this was affected by the hip impact configuration and gender. Eighteen young adults (9 males and 9 females) participated in the pelvis release experiment. The pelvis was raised through a rope attached to an electromagnet on the ceiling, so the skin surface barely touches the ultrasound probe, which flush to a Plexiglas plate placed on a force plate. The electromagnet was turned off to cause a fall while the soft tissue deformation and associated compressive force were being recorded. Trials were acquired with three hip impact configurations. An outcome variable included the energy absorbed by the femoral soft tissue during a fall. The energy absorbed by the femoral soft tissue ranged from 0.03 to 3.05 J. Furthermore, the energy absorption was associated with the hip impact configuration (F = 4.69, p = 0.016). On average, the absorbed energy was 62% greater in posteriolateral than anteriolateral impact (0.92 versus 0.57 J). However, the energy absorption did not differ between male and female (F = 0.91, p = 0.36). The force-deflection behavior of the femoral soft tissue during a fall has been recorded, providing insights on the potential protective benefits of the soft tissue covering during a fall.
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Affiliation(s)
- Ki Taek Lim
- Injury Prevention and Biomechanics Laboratory, Department of Physical Therapy, Yonsei University, Wonju, South Korea
| | - Woochol Joseph Choi
- Injury Prevention and Biomechanics Laboratory, Department of Physical Therapy, Yonsei University, Wonju, South Korea.
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Finite element analysis of Bi-condylar Tibial Plateau fractures to assess the effect of coronal splits. Med Eng Phys 2020; 84:84-95. [DOI: 10.1016/j.medengphy.2020.07.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/08/2020] [Accepted: 07/26/2020] [Indexed: 11/21/2022]
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Howe JG, Hill RS, Stroncek JD, Shaul JL, Favell D, Cheng RR, Engelke K, Genant HK, Lee DC, Keaveny TM, Bouxsein ML, Huber B. Treatment of bone loss in proximal femurs of postmenopausal osteoporotic women with AGN1 local osteo-enhancement procedure (LOEP) increases hip bone mineral density and hip strength: a long-term prospective cohort study. Osteoporos Int 2020; 31:921-929. [PMID: 31802158 PMCID: PMC7170985 DOI: 10.1007/s00198-019-05230-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 11/07/2019] [Indexed: 12/14/2022]
Abstract
UNLABELLED This first-in-human study of AGN1 LOEP demonstrated that this minimally-invasive treatment durably increased aBMD in femurs of osteoporotic postmenopausal women. AGN1 resorption was coupled with new bone formation by 12 weeks and that new bone was maintained for at least 5-7 years resulting in substantially increased FEA-estimated femoral strength. INTRODUCTION This first-in-human study evaluated feasibility, safety, and in vivo response to treating proximal femurs of postmenopausal osteoporotic women with a minimally-invasive local osteo-enhancement procedure (LOEP) to inject a resorbable triphasic osteoconductive implant material (AGN1). METHODS This prospective cohort study enrolled 12 postmenopausal osteoporotic (femoral neck T-score ≤ - 2.5) women aged 56 to 89 years. AGN1 LOEP was performed on left femurs; right femurs were untreated controls. Subjects were followed-up for 5-7 years. Outcomes included adverse events, proximal femur areal bone mineral density (aBMD), AGN1 resorption, and replacement with bone by X-ray and CT, and finite element analysis (FEA) estimated hip strength. RESULTS Baseline treated and control femoral neck aBMD was equivalent. Treated femoral neck aBMD increased by 68 ± 22%, 59 ± 24%, and 58 ± 27% over control at 12 and 24 weeks and 5-7 years, respectively (p < 0.001, all time points). Using conservative assumptions, FEA-estimated femoral strength increased by 41%, 37%, and 22% at 12 and 24 weeks and 5-7 years, respectively (p < 0.01, all time points). Qualitative analysis of X-ray and CT scans demonstrated that AGN1 resorption and replacement with bone was nearly complete by 24 weeks. By 5-7 years, AGN1 appeared to be fully resorbed and replaced with bone integrated with surrounding trabecular and cortical bone. No procedure- or device-related serious adverse events (SAEs) occurred. CONCLUSIONS Treating femurs of postmenopausal osteoporotic women with AGN1 LOEP results in a rapid, durable increase in aBMD and femoral strength. These results support the use and further clinical study of this approach in osteoporotic patients at high risk of hip fracture.
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Affiliation(s)
- J G Howe
- AgNovos Healthcare LLC, Rockville, MD, USA
| | - R S Hill
- AgNovos Healthcare LLC, Rockville, MD, USA.
| | | | - J L Shaul
- AgNovos Healthcare LLC, Rockville, MD, USA
| | - D Favell
- AgNovos Healthcare LLC, Rockville, MD, USA
| | - R R Cheng
- AgNovos Healthcare LLC, Rockville, MD, USA
| | - K Engelke
- Bioclinica-Synarc, Inc., Hamburg, Germany
- FAU University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - H K Genant
- University of California San Francisco, San Francisco, CA, USA
- Bioclinica-Synarc, Inc., Newark, CA, USA
| | - D C Lee
- O.N. Diagnostics, Berkeley, CA, USA
| | - T M Keaveny
- University of California Berkeley, Berkley, CA, USA
| | - M L Bouxsein
- Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - B Huber
- Mansfield Orthopedics, Morrisville, VT, USA
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Stroncek JD, Shaul JL, Favell D, Hill RS, Huber BM, Howe JG, Bouxsein ML. In vitro injection of osteoporotic cadaveric femurs with a triphasic calcium-based implant confers immediate biomechanical integrity. J Orthop Res 2019; 37:908-915. [PMID: 30793358 PMCID: PMC6593990 DOI: 10.1002/jor.24239] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 01/21/2019] [Indexed: 02/04/2023]
Abstract
Current pharmaceutical therapies can reduce hip fractures by up to 50%, but compliance to treatment is low and therapies take up to 18 months to reduce risk. Thus, alternative or complementary approaches to reduce the risk of hip fracture are needed. The AGN1 local osteo-enhancement procedure (LOEP) is one such alternative approach, as it is designed to locally replace bone lost due to osteoporosis and provide immediate biomechanical benefit. This in vitro study evaluated the initial biomechanical impact of this treatment on human cadaveric femurs. We obtained 45 pairs of cadaveric femurs from women aged 77.8 ± 8.8 years. One femur of each pair was treated, while the contralateral femur served as an untreated control. Treatment included debridement, irrigation/suction, and injection of a triphasic calcium-based implant (AGN1). Mechanical testing of the femora was performed in a sideways fall configuration 24 h after treatment. Of the 45 pairs, 4 had normal, 16 osteopenic, and 25 osteoporotic BMD T-scores. Altogether, treatment increased failure load on average by 20.5% (p < 0.0001). In the subset of osteoporotic femurs, treatment increased failure load by 26% and work to failure by 45% (p < 0.01 for both). Treatment did not significantly affect stiffness in any group. These findings provide evidence that local delivery of the triphasic calcium-based implant in the proximal femur is technically feasible and provides immediate biomechanical benefit. Our results provide strong rationale for additional studies investigating the utility of this approach for reducing the risk of hip fracture. © 2019 The Authors. Journal of Orthopaedic Research® Published by Wiley Periodicals, Inc. on behalf of Orthopaedic Research Society.
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Affiliation(s)
- John D. Stroncek
- AgNovos Healthcare7301 Calhoun Place Suite 100RockvilleMaryland 20855
| | - Jonathan L. Shaul
- AgNovos Healthcare7301 Calhoun Place Suite 100RockvilleMaryland 20855
| | - Dominique Favell
- AgNovos Healthcare7301 Calhoun Place Suite 100RockvilleMaryland 20855
| | - Ronald S. Hill
- AgNovos Healthcare7301 Calhoun Place Suite 100RockvilleMaryland 20855
| | - Bryan M. Huber
- Copley Hospital528 Washington HwyMorrisvilleVermont 05661
| | - James G. Howe
- AgNovos Healthcare7301 Calhoun Place Suite 100RockvilleMaryland 20855
| | - Mary L. Bouxsein
- Center for Advanced Orthopedic Studies, Beth Israel Deaconess Medical Center and Dept. of Orthopedic SurgeryHarvard Medical School330 Brookline AveBostonMassachusetts 02215
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14
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Cazzato RL, Koch G, Garnon J, Ramamurthy N, Jégu J, Clavert P, Gangi A. Biomechanical effects of osteoplasty with or without Kirschner wire augmentation on long bone diaphyses undergoing bending stress: implications for percutaneous imaging-guided consolidation in cancer patients. Eur Radiol Exp 2019; 3:4. [PMID: 30693406 PMCID: PMC6890912 DOI: 10.1186/s41747-018-0082-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/14/2018] [Indexed: 12/15/2022] Open
Abstract
Background Osteoplasty has been discouraged in long bones. However, despite a substantial lack of pre-clinical biomechanical tests, multiple clinical studies have implemented a wide range of techniques to optimise long bone osteoplasty. The aim of the present study is to evaluate the biomechanical properties of osteoplasty alone and in combination with Kirschner wires (K-wires) in a cadaveric human diaphyseal model undergoing 3-point bending stress. Methods Thirty unpaired human cadaveric hemi-tibia specimens were randomly assigned to receive no consolidation (group 1, n = 10), osteoplasty alone (group 2, n = 10), or K-wires augmented osteoplasty (group 3, n = 10). Specimens were tested on a dedicated servo-hydraulic machine using a 3-point bending test. Fracture load was calculated for each specimen; two-sample Wilcoxon rank-sum tests were used to assess differences between groups. Results Median volume of polymethyl methacrylate injected was 18 mL for group 2 (25th–50th percentile 15–21 mL) and 19 mL for group 3 (25th–50th percentile 17–21). There were no significant differences in fracture load between groups 1 and 2 (z = − 0.793; p = 0.430), between groups 1 and 3 (z = − 0.944; p = 0.347), and between groups 2 and 3 (z = − 0.454; p = 0.650). Fractures through the cement occurred in 4 of 30 cases (13.3%); there were no K-wires fractures. Conclusions Osteoplasty with or without K-wires augmentation does not improve the resistance of diaphyseal bone to bending stresses.
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Affiliation(s)
- Roberto Luigi Cazzato
- Department of Interventional Radiology, Nouvel Hôpital Civil (Hôpitaux Universitaires de Strasbourg, HUS), 1, place de l'Hôpital, 67000, Strasbourg, France.
| | - Guillaume Koch
- Department of Interventional Radiology, Nouvel Hôpital Civil (Hôpitaux Universitaires de Strasbourg, HUS), 1, place de l'Hôpital, 67000, Strasbourg, France
| | - Julien Garnon
- Department of Interventional Radiology, Nouvel Hôpital Civil (Hôpitaux Universitaires de Strasbourg, HUS), 1, place de l'Hôpital, 67000, Strasbourg, France
| | - Nitin Ramamurthy
- Department of Radiology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, NR4 7UY, UK
| | - Jérémie Jégu
- Laboratoire d'Epidémiologie et de Santé Publique - EA3430, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg, France
| | - Philippe Clavert
- Department of Normal Anatomy, Hôpitaux Universitaires de Strasbourg, HUS France, 1, place de l'Hôpital, 67000, Strasbourg, France
| | - Afshin Gangi
- Department of Interventional Radiology, Nouvel Hôpital Civil (Hôpitaux Universitaires de Strasbourg, HUS), 1, place de l'Hôpital, 67000, Strasbourg, France
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15
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Giannini S, Chiarello E, Mazzotti A, Tedesco G, Faldini C. Surgical prevention of femoral neck fractures in elderly osteoporotic patients: a randomised controlled study on the prevention nail system device. Hip Int 2018; 28:78-83. [PMID: 30755119 DOI: 10.1177/1120700018813207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
INTRODUCTION: Hip fractures represent an enormous challenge for our health care system. The aim of this randomised controlled trial was to assess both efficacy and safety of a novel device called Prevention Nail System (PNS) and developed for the surgical prevention of a contralateral femoral neck fracture (FNF) in elderly osteoporotic patients. METHODS: Primary outcome was to evaluate, in patients suffering from osteoporotic FNF, the effectiveness of PNS in reducing the incidence of a contralateral hip fracture. Secondary outcome was to evaluate the safety of this device therefore intra- and postoperative complications were recorded. RESULTS: 72 patients, with an age ⩾65 years old, were enrolled (38 study group (group A) and 34 control group (group B). 3 and 5 contralateral FNF were recorded respectively in group A and B. An interim analysis showed a non-effectiveness of the device therefore enrollment was suspended. DISCUSSION: In all group A failures a difficult positioning of the PNS was recorded: surgical techniques errors may have affected the result. Nevertheless, it is improbable to hypothesise that, without substantial modifications to the PNS design, this could significantly reduce the incidence of FNF. Considering that current pharmacological approach can achieve, at best, a marginal reduction in FNF especially in patients at high risk, complementary approaches to provide immediate prevention of hip fractures may need to be developed. CLINICAL TRIAL PROTOCOL: N° 263. 03 June 2008.
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Affiliation(s)
- Sandro Giannini
- 1 I.R.C.C.S. - Istituto Ortopedico Rizzoli, Bologna, Italy.,2 University of Bolgna, Italy
| | - Eugenio Chiarello
- 3 Orthopaedics and Traumatology, "Ospedale dell'Angelo," Venice, Italy
| | - Antonio Mazzotti
- 1 I.R.C.C.S. - Istituto Ortopedico Rizzoli, Bologna, Italy.,2 University of Bolgna, Italy.,4 1st Orthoapedic and Trauma Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Guiseppe Tedesco
- 1 I.R.C.C.S. - Istituto Ortopedico Rizzoli, Bologna, Italy.,5 Unit of Oncologic and Degenerative Spine Surgery, I.R.C.C.S. - Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Cesare Faldini
- 1 I.R.C.C.S. - Istituto Ortopedico Rizzoli, Bologna, Italy.,2 University of Bolgna, Italy.,4 1st Orthoapedic and Trauma Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy
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Affiliation(s)
- Joey P Johnson
- Department of Orthopaedic Surgery, Division of Orthopaedic Trauma, Loma Linda University, 11406 Loma Linda Drive, Suite 128, Loma Linda CA, 92354, USA.
| | | | - Peter V Giannoudis
- Department of Orthopedic Surgery, Division of Trauma and Related Services, Leeds General Infirmary, Leeds, UK
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17
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Aebi M, Maas C, Di Pauli von Treuheim T, Friedrich H, Wilke HJ. Comparative biomechanical study of a new transpedicular vertebral device and vertebroplasty for the treatment or prevention of vertebral compression fractures. Clin Biomech (Bristol, Avon) 2018; 56:40-45. [PMID: 29803111 DOI: 10.1016/j.clinbiomech.2018.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/27/2018] [Accepted: 05/01/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND A comparative study was performed between a novel transpedicular implant (V-STRUT©, Hyprevention, France) and vertebroplasty. This study aims to assess the biomechanical efficacy of this implant in resurrecting and fortifying the osteoporotic vertebra following a vertebral body fracture. METHODS A total of 17 vertebrae from 3 human osteoporotic spine segments (T9-L5) were selected. Vertebral compression fractures were generated by eccentric compressive loading until a height reduction of 25%. Then the vertebrae were either fixed using vertebroplasty technique (control group; n = 8) or implanted with V-STRUT© implant combined with bone cement (device group; n = 9). A new compressive loading was performed in the same conditions. Maximal load and stiffness, as well as total energy to fracture were measured. FINDINGS Fracture force and energy to fracture were both increased either after V-STRUT© implantation or vertebroplasty compared to when the initial fracture was generated. Mean increase percentage between the initial value and the post-treatment value for each parameter were +77% vs +39% regarding fracture load and +126% vs +99% for energy to fracture, for the device group vs vertebroplasty group respectively. No pedicle fractures were observed in both groups, nor implant breaking or bending in the device group. INTERPRETATION These results show the ability of V-STRUT© combined with bone cement to reinforce the vertebral body strength, with an at least equivalent biomechanical performance as vertebroplasty. Further clinical investigation needs to be undertaken to demonstrate any clinical superiority of V-STRUT© over vertebroplasty.
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Affiliation(s)
- Max Aebi
- Salem Spital, Orthopedic Department, Bern, Switzerland
| | | | - Theodor Di Pauli von Treuheim
- Institute of Orthopaedic Research and Biomechanics, Trauma Research Center Ulm (ZTF), University Hospital Ulm, Germany
| | - Hannah Friedrich
- Institute of Orthopaedic Research and Biomechanics, Trauma Research Center Ulm (ZTF), University Hospital Ulm, Germany
| | - Hans-Joachim Wilke
- Institute of Orthopaedic Research and Biomechanics, Trauma Research Center Ulm (ZTF), University Hospital Ulm, Germany
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18
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Kelekis A, Cornelis FH, Tutton S, Filippiadis D. Metastatic Osseous Pain Control: Bone Ablation and Cementoplasty. Semin Intervent Radiol 2017; 34:328-336. [PMID: 29249856 PMCID: PMC5730439 DOI: 10.1055/s-0037-1608747] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nociceptive and/or neuropathic pain can be present in all phases of cancer (early and metastatic) and are not adequately treated in 56 to 82.3% of patients. In these patients, radiotherapy achieves overall pain responses (complete and partial responses combined) up to 60 and 61%. On the other hand, nowadays, ablation is included in clinical guidelines for bone metastases and the technique is governed by level I evidence. Depending on the location of the lesion in the peripheral skeleton, either the Mirels scoring or the Harrington (alternatively the Levy) grading system can be used for prophylactic fixation recommendation. As minimally invasive treatment options may be considered in patients with poor clinical status or limited life expectancy, the aim of this review is to detail the techniques proposed so far in the literature and to report the results in terms of safety and efficacy of ablation and cementoplasty (with or without fixation) for bone metastases. Percutaneous image-guided treatments appear as an interesting alternative for localized metastatic lesions of the peripheral skeleton.
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Affiliation(s)
- Alexis Kelekis
- Division of Diagnostic and Interventional Radiology, 2nd Department of Radiology, University General Hospital “ATTIKON,” Athens, Greece
| | - Francois H. Cornelis
- Department of Radiology, Université Pierre et Marie Curie, Sorbonne Université, Tenon Hospital, Paris, France
| | - Sean Tutton
- Division of Vascular and Interventional Radiology, Department of Radiology and Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Dimitrios Filippiadis
- Division of Diagnostic and Interventional Radiology, 2nd Department of Radiology, University General Hospital “ATTIKON,” Athens, Greece
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19
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Pain management: The rising role of interventional oncology. Diagn Interv Imaging 2017; 98:627-634. [DOI: 10.1016/j.diii.2017.06.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 06/27/2017] [Indexed: 02/06/2023]
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20
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Cornelis FH, Deschamps F. Augmented osteoplasty for proximal femur consolidation in cancer patients: Biomechanical considerations and techniques. Diagn Interv Imaging 2017; 98:645-650. [PMID: 28757428 DOI: 10.1016/j.diii.2017.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 06/22/2017] [Indexed: 11/27/2022]
Abstract
According to the literature, prophylactic consolidation of lytic metastasis located in the proximal femur is recommended when the Mirels' score is above 8. Osteoplasty alone provides inadequate consolidation but various devices have been used in association for better consolidation. The aim of this review is to detail the augmented osteoplasty techniques published in the literature and to report their safeties and their efficacies to prevent pathological fracture of the proximal femur. A Pubmed research found 5 studies that evaluated augmented osteoplasty of the proximal femur in cancer patients. All devices demonstrate adequate safety and low rate of secondary pathological fractures.
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Affiliation(s)
- F H Cornelis
- Department of Radiology, Hôpital Tenon, 4, rue de la Chine, 75020 Paris, France.
| | - F Deschamps
- Department of Interventional Radiology, Gustave-Roussy cancer center, 114, rue Edouard-Vaillant, 94805 Villejuif, France
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21
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Filippiadis D, Mavrogenis AF, Mazioti A, Palialexis K, Megaloikonomos PD, Papagelopoulos PJ, Kelekis A. Metastatic bone disease from breast cancer: a review of minimally invasive techniques for diagnosis and treatment. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2017; 27:729-736. [PMID: 28597402 DOI: 10.1007/s00590-017-1986-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 05/30/2017] [Indexed: 01/20/2023]
Abstract
Skeletal-related events in patients with metastatic bone disease include intractable severe pain, pathologic fracture, spinal cord and nerve compression, hypercalcemia and bone marrow aplasia. In patients with breast cancer, the skeleton is the most frequent site for metastases. Treatment options for metastatic bone disease in these patients include bisphosphonates, chemotherapeutic agents, opioids, hormonal therapy, minimally invasive/interventional and surgical techniques. Interventional oncology techniques for breast cancer patients with bone metastases include diagnostic (biopsy) and therapeutic (palliative and curative) approaches. In the latter, percutaneous ablation, augmentation and stabilization are included. The purpose of this article is to describe the basic concepts of biopsy, ablation, embolization and peripheral skeleton augmentation techniques in patients with metastatic bone disease from breast carcinoma. The necessity for a tailored approach applying different techniques for different cases and locations will be addressed.
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Affiliation(s)
- Dimitrios Filippiadis
- Second Department of Radiology, National and Kapodistrian University of Athens, School of Medicine, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece.
| | - Andreas F Mavrogenis
- First Department of Orthopaedics, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
| | - Argyro Mazioti
- Second Department of Radiology, National and Kapodistrian University of Athens, School of Medicine, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
| | - Konstantinos Palialexis
- Second Department of Radiology, National and Kapodistrian University of Athens, School of Medicine, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
| | - Panayiotis D Megaloikonomos
- First Department of Orthopaedics, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
| | - Panayiotis J Papagelopoulos
- First Department of Orthopaedics, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
| | - Alexis Kelekis
- Second Department of Radiology, National and Kapodistrian University of Athens, School of Medicine, Attikon University General Hospital, 41 Ventouri Street, Holargos, 15562, Athens, Greece
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A Novel Implant for the Prophylactic Treatment of Impending Pathological Fractures of the Proximal Femur: Results from a Prospective, First-in-Man Study. Cardiovasc Intervent Radiol 2017; 40:1070-1076. [DOI: 10.1007/s00270-017-1613-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/16/2017] [Indexed: 11/27/2022]
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23
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Cazzato RL, Garnon J, Tsoumakidou G, Koch G, Palussière J, Gangi A, Buy X. Percutaneous image-guided screws meditated osteosynthesis of impeding and pathological/insufficiency fractures of the femoral neck in non-surgical cancer patients. Eur J Radiol 2017; 90:1-5. [PMID: 28583620 DOI: 10.1016/j.ejrad.2017.02.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/02/2017] [Accepted: 02/15/2017] [Indexed: 11/28/2022]
Abstract
AIM To present percutaneous image-guided screw-mediated osteosynthesis (PIGSMO) for fixation of impending fractures (ImF) and non-displaced/mildly displaced pathological/insufficient fractures (PF/InF) of the femoral neck in non-surgical cancer patients. MATERIALS AND METHODS This is a double-centre single-arm observational study. Retrospective review of electronic records identified all oncologic patients who had undergone femoral neck PIGSMO. Inclusion criteria were: non-displaced or mildly displaced PF/InF, and ImF (Mirels' score ≥8); life expectancy ≥1 month; unsuitability for surgical treatment due to sub-optimal clinical fitness, refusal of consent, or unacceptable delay to systemic therapy. RESULTS Eleven patients were treated (mean age 63.7±13.5 years) due to ImF (63.6%, mean Mirels' score 10.1), PF (27.3%) or post-radiation InF (9.1%) under CT/fluoroscopy- (36.4%) or CBCT- (63.6%) guidance. Thirty-two screws were implanted and cement injection was added in 36.4% cases. Technical success was 90.9%. No procedure related complications were noted. At 1-month clinical follow-up (pain/walking impairment), 63.6% and 27.3% patients reported significant and mild improvement, respectively. Imaging follow-up (available in 63.6% cases) showed no signs of secondary fractures, neither of screws loosening at mean 2.8 months. Five patients (45.5%) died after PIGSMO (mean time interval 3.6 months). CONCLUSIONS PIGSMO is technically feasible and safe in cancer patients with limited life expectancy; it offers good short-term results. Further prospective studies are required to corroborate mid- and to prove long-term efficacy of the technique.
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Affiliation(s)
- Roberto Luigi Cazzato
- Department of Interventional Radiology, Hopitaux Universitaires de Strasbourg (HUS), 1, place de l'Hopital, 67000 Strasbourg, France.
| | - Julien Garnon
- Department of Interventional Radiology, Hopitaux Universitaires de Strasbourg (HUS), 1, place de l'Hopital, 67000 Strasbourg, France.
| | - Georgia Tsoumakidou
- Department of Interventional Radiology, Hopitaux Universitaires de Strasbourg (HUS), 1, place de l'Hopital, 67000 Strasbourg, France.
| | - Guillaume Koch
- Department of Interventional Radiology, Hopitaux Universitaires de Strasbourg (HUS), 1, place de l'Hopital, 67000 Strasbourg, France.
| | - Jean Palussière
- Department of Radiology, Institut Bergonié, 229 cours de l'Argonne, 33076 Bordeaux Cedex, France.
| | - Afshin Gangi
- Department of Interventional Radiology, Hopitaux Universitaires de Strasbourg (HUS), 1, place de l'Hopital, 67000 Strasbourg, France.
| | - Xavier Buy
- Department of Radiology, Institut Bergonié, 229 cours de l'Argonne, 33076 Bordeaux Cedex, France.
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Cornelis FH, Tselikas L, Carteret T, Lapuyade B, De Baere T, Le Huec JC, Deschamps F. Percutaneous internal fixation with Y-STRUT® device to prevent both osteoporotic and pathological hip fractures: a prospective pilot study. J Orthop Surg Res 2017; 12:27. [PMID: 28183325 PMCID: PMC5301413 DOI: 10.1186/s13018-017-0514-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/24/2016] [Indexed: 11/19/2022] Open
Abstract
Background We studied Y-STRUT® (Hyprevention, France), a new percutaneous internal fixation device, in combination with bone cementoplasty to prevent hip fracture. Methods Between February 2013 and February 2015, a total of 16 femoral necks in 4 osteoporotic and 12 oncologic patients have been considered for prophylactic consolidation in this prospective multicentre pilot study involving 4 different hospitals. These consolidations were performed percutaneously under fluoroscopic guidance using Y-STRUT®, a dedicated internal fixation device. For osteoporotic patients, orthopaedic surgeons performed the prophylactic consolidations immediately after surgical treatment of a hip fracture (same anaesthesia) in the opposite side. For oncologic patients, without current hip fracture but considered at risk (Mirels score ≥8), interventional radiologists performed the procedures. We report the preliminary results of feasibility, safety and tolerance of these preventive consolidations using Y-STRUT®. Results Four patients (mean 83 years old) had prophylactic consolidation because of a severe osteoporosis (mean T-score −3.30) resulting in first hip fractures. Ten patients (mean 61 years old) were treated because of impending pathological fractures (mean Mirels score 9) related to femoral neck osteolytic metastases. All the procedures were performed with success. Wound healing was achieved in all cases with no access site complication. Radiographic exams performed at 3 months follow-up revealed that Y-STRUT® was well integrated in the bone. For the osteoporotic cohort, mean pain was 0.9 ± 0.7 at 3 weeks. For the oncologic cohort, it decreases from 3.6 ± 2.9 at baseline to 2.4 ± 0.9 at 2 months. Conclusions Preliminary results demonstrate the feasibility and safety of Y-STRUT® implantation as well as the tolerance of the device.
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Affiliation(s)
- François H Cornelis
- Pellegrin Hospital, CHU Bordeaux, Bordeaux, France. .,Tenon Hospital, Radiology Department, APHP, Paris, France.
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Varga P, Hofmann-Fliri L, Blauth M, Windolf M. Prophylactic augmentation of the osteoporotic proximal femur-mission impossible? BONEKEY REPORTS 2016; 5:854. [PMID: 28018586 DOI: 10.1038/bonekey.2016.86] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/01/2016] [Indexed: 11/09/2022]
Abstract
The high incidence of secondary hip fractures and the associated markedly increased mortality call for preventive actions that could help to avoid these injuries. By providing immediate strengthening and not relying on patient compliance, internal prophylactic augmentation of the osteoporotic proximal femur may overcome the main limitations of systemic bone drugs and wearable protective pads. However, such a method would have to provide sufficient and reliable strengthening effect with minimal risks and side effects to justify the need of an invasive treatment. The requirements for an internal reinforcement approach are thus strict and include mechanical, biological, clinical, ethical and financial criteria. Here we first attempt to describe the properties of an ideal augmentation method. Previously published methodologies and techniques developed at our research institute, including approaches using cements, metals, other materials or combined approaches, are then reviewed and evaluated according to these aspects. We conclude that none of the discussed methodologies appears to be able to deliver a sufficiently high gain-versus-risk ratio that could justify the clinical application and thus augmentation of the osteoporotic proximal femur remains a challenge. Finally, we provide suggestions for the development and evaluation of future strategies.
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Affiliation(s)
- Peter Varga
- AO Research Institute Davos , Davos Platz, Switzerland
| | | | - Michael Blauth
- Department for Trauma Surgery, Medical University Innsbruck , Innsbruck, Austria
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Unmet needs and current and future approaches for osteoporotic patients at high risk of hip fracture. Arch Osteoporos 2016; 11:37. [PMID: 27800591 PMCID: PMC5306171 DOI: 10.1007/s11657-016-0292-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 10/25/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED This review provides a critical analysis of currently available approaches to increase bone mass, structure and strength through drug therapy and of possible direct intra-osseous interventions for the management of patients at imminent risk of hip fracture. PURPOSE Osteoporotic hip fractures represent a particularly high burden in morbidity-, mortality- and health care-related costs. There are challenges and unmet needs in the early prevention of hip fractures, opening the perspective of new developments for the management of osteoporotic patients at imminent and/or at very high risk of hip fracture. Amongst them, preventive surgical intervention needs to be considered. METHODS A European Society for Clinical and Economic Aspects of Osteoporosis, Osteoarthritis and Musculoskeletal Diseases (ESCEO)/International Osteoporosis Foundation (IOF) working group reviewed the presently available intervention modalities including preventive surgical options for hip fragility. This paper represents a summary of the discussions. RESULTS Prevention of hip fracture is currently based on regular physical activity; prevention of falls; correction of nutritional deficiencies, including vitamin D repletion; and pharmacological intervention. However, efficacy of these various measures to reduce hip fractures is at most 50% and may need months or years before becoming effective. To face the challenges of early prevention of hip fractures for osteoporotic patients at imminent and/or at very high risk of hip fracture, preventive surgical intervention needs further investigation. CONCLUSION Preventive surgical intervention needs to be appraised for osteoporotic patients at imminent and/or at very high risk of hip fracture.
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Chiarello E, Tedesco G, Cadossi M, Capra P, Terrando S, Miti A, Giannini S. Surgical prevention of femoral neck fractures in elderly osteoporotic patients. A literature review. CLINICAL CASES IN MINERAL AND BONE METABOLISM : THE OFFICIAL JOURNAL OF THE ITALIAN SOCIETY OF OSTEOPOROSIS, MINERAL METABOLISM, AND SKELETAL DISEASES 2016; 13:42-5. [PMID: 27252744 PMCID: PMC4869953 DOI: 10.11138/ccmbm/2016.13.1.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fragility fractures of the femur are one of the major causes of morbidity and mortality worldwide. The incidence of new contralateral hip fractures in elderly osteoporotic patients ranges from 7 to 12% within 2 years after the first fracture. Secondary prevention can be divided in: pharmacological therapy based on the prescription of anti-osteoporotic drugs with different mechanism of action and non-pharmacological therapy which is based on modification of environmental risk factors, on a healthy diet with daily supplements of calcium and vitamin D and calcium and on the use of hip protectors. Recently a new form of prevention is becoming achievable: surgical prevention; the rationale of surgical reinforcement is the need to increase the resistance of the femoral neck to the compression and distraction forces acting on it. In this paper we analyse all the experimental and "on the market" device available for the surgical prevention of femoral neck fracture.
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Affiliation(s)
- Eugenio Chiarello
- Orthopaedics and Traumatology, “Ospedale dell’Angelo”, Venice, Italy
| | - Giuseppe Tedesco
- 1 Orthopaedic and Trauma Clinic, Rizzoli Ortopaedic Institute, University of Bologna, Bologna, Italy
| | - Matteo Cadossi
- 1 Orthopaedic and Trauma Clinic, Rizzoli Ortopaedic Institute, University of Bologna, Bologna, Italy
| | - Paola Capra
- 1 Orthopaedic and Trauma Clinic, Rizzoli Ortopaedic Institute, University of Bologna, Bologna, Italy
| | - Silvio Terrando
- 1 Orthopaedic and Trauma Clinic, Rizzoli Ortopaedic Institute, University of Bologna, Bologna, Italy
| | - Andrea Miti
- Orthopaedics and Traumatology, “Ospedale dell’Angelo”, Venice, Italy
| | - Sandro Giannini
- 1 Orthopaedic and Trauma Clinic, Rizzoli Ortopaedic Institute, University of Bologna, Bologna, Italy
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