G Lewis

Summary

Affiliation: University of Memphis
Country: USA

Publications

  1. ncbi request reprint Influence of three variables on the stresses in a three-dimensional model of a proximal tibia-total knee implant construct
    Partha Sarathi Kopparti
    Department of Chemical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Biomed Mater Eng 17:19-28. 2007
  2. doi request reprint Properties of open-cell porous metals and alloys for orthopaedic applications
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN, 38152 3180, USA
    J Mater Sci Mater Med 24:2293-325. 2013
  3. doi request reprint Nucleus pulposus replacement and regeneration/repair technologies: present status and future prospects
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 100:1702-20. 2012
  4. ncbi request reprint Finite element analysis of a three-dimensional model of a proximal femur-cemented femoral THJR component construct: influence of assigned interface conditions on strain energy density
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomed Mater Eng 16:319-27. 2006
  5. ncbi request reprint Influence of changes in the composition of an acrylic bone cement on its polymerization kinetics
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 81:524-9. 2007
  6. ncbi request reprint Percutaneous vertebroplasty and kyphoplasty for the stand-alone augmentation of osteoporosis-induced vertebral compression fractures: present status and future directions
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 81:371-86. 2007
  7. ncbi request reprint Estimation of the optimum loading of an antibiotic powder in an acrylic bone cement: gentamicin sulfate in SmartSet HV
    Gladius Lewis
    Department of Mechanical Engineering, University of Memphis Memphis, TN, 38152 3180 USA
    Acta Orthop 77:622-7. 2006
  8. ncbi request reprint Critical comparison of two methods for the determination of nanomechanical properties of a material: application to synthetic and natural biomaterials
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 78:312-7. 2006
  9. ncbi request reprint Alendronate in bone cement: fatigue life degraded by liquid, not by powder
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    Clin Orthop Relat Res 445:233-8. 2006
  10. ncbi request reprint Influence of a pre-blended antibiotic (gentamicin sulfate powder) on various mechanical, thermal, and physical properties of three acrylic bone cements
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomater Appl 20:377-408. 2006

Collaborators

Detail Information

Publications71

  1. ncbi request reprint Influence of three variables on the stresses in a three-dimensional model of a proximal tibia-total knee implant construct
    Partha Sarathi Kopparti
    Department of Chemical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Biomed Mater Eng 17:19-28. 2007
    ..2). However, the nature of the elastic properties that were assigned to the bones (isotropic versus anisotropic) had only a marginal influence on the stresses...
  2. doi request reprint Properties of open-cell porous metals and alloys for orthopaedic applications
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN, 38152 3180, USA
    J Mater Sci Mater Med 24:2293-325. 2013
    ....
  3. doi request reprint Nucleus pulposus replacement and regeneration/repair technologies: present status and future prospects
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 100:1702-20. 2012
    ..This review ends with a summary of the salient points made...
  4. ncbi request reprint Finite element analysis of a three-dimensional model of a proximal femur-cemented femoral THJR component construct: influence of assigned interface conditions on strain energy density
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomed Mater Eng 16:319-27. 2006
    ..22) compared to when perfect bonding conditions were taken to exist at these interfaces. The significance of this finding, together with the study limitations, is discussed...
  5. ncbi request reprint Influence of changes in the composition of an acrylic bone cement on its polymerization kinetics
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 81:524-9. 2007
    ..The importance of this finding, together with results from two relevant literature reports, is discussed within the context of the use of modified bone cements in cemented arthroplasties...
  6. ncbi request reprint Percutaneous vertebroplasty and kyphoplasty for the stand-alone augmentation of osteoporosis-induced vertebral compression fractures: present status and future directions
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 81:371-86. 2007
    ..The final section contains a summary of the most salient points/observations made in the report...
  7. ncbi request reprint Estimation of the optimum loading of an antibiotic powder in an acrylic bone cement: gentamicin sulfate in SmartSet HV
    Gladius Lewis
    Department of Mechanical Engineering, University of Memphis Memphis, TN, 38152 3180 USA
    Acta Orthop 77:622-7. 2006
    ..In the latter situation, an arbitrary rather than a rational approach is used for deciding on the amount of the antibiotic that is blended with the cement powder (herein referred to as "the antibiotic powder loading")...
  8. ncbi request reprint Critical comparison of two methods for the determination of nanomechanical properties of a material: application to synthetic and natural biomaterials
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 78:312-7. 2006
    ..The article also includes a succinct discussion of factors that affect the values of material properties computed from nanoindentation measurements, such as the loading rate and the surface roughness of the test specimen...
  9. ncbi request reprint Alendronate in bone cement: fatigue life degraded by liquid, not by powder
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    Clin Orthop Relat Res 445:233-8. 2006
    ..A meta-analysis of randomized controlled trials showed that alendronate and pamidronate had beneficial effects maintaining periprosthetic bone for as much as 1 year after a total joint replacement...
  10. ncbi request reprint Influence of a pre-blended antibiotic (gentamicin sulfate powder) on various mechanical, thermal, and physical properties of three acrylic bone cements
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomater Appl 20:377-408. 2006
    ....
  11. ncbi request reprint Evaluation of an accelerated aging medium for acrylic bone cement based on analysis of nanoindentation measurements on laboratory-prepared and retrieved specimens
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 81:544-50. 2007
    ..This body of results points to the possibility that the aging solution is effective, although the evidence is not conclusive...
  12. ncbi request reprint Influence of the radiopacifier in an acrylic bone cement on its mechanical, thermal, and physical properties: barium sulfate-containing cement versus iodine-containing cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 312 Engineering Science Building, Tennessee, USA
    J Biomed Mater Res B Appl Biomater 73:77-87. 2005
    ..When all the present results are considered, there is a clear indication that the I-cement is a viable candidate cement for use in cemented arthroplasties in place of the B-cement...
  13. ncbi request reprint Influence of the method of blending an antibiotic powder with an acrylic bone cement powder on physical, mechanical, and thermal properties of the cured cement
    Gladius Lewis
    Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, TN 38152 3180, USA
    Biomaterials 26:4317-25. 2005
    ..Notwithstanding these results, it is suggested that when the powder mixture is blended in the operating room, using the OmoMix 1 is more likely to produce a more consistent and reproducible mixture than when manual mixing is used...
  14. ncbi request reprint The in vitro elution of gentamicin sulfate from a commercially available gentamicin-loaded acrylic bone cement, VersaBond AB
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 71:77-83. 2004
    ..20 and 1.28 +/- 0.14 wt %/day for the STATIC and DYNAMIC specimens, respectively. It is suggested that the present results provide support for the postulate that the elution mechanism of gentamicin in this cement is a surface phenomenon...
  15. ncbi request reprint Influence of the activator in an acrylic bone cement on an array of cement properties
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee, USA
    J Biomed Mater Res A 81:544-53. 2007
    ..The present results, taken in conjunction with those presented in previous reports by the present authors and co-workers on other properties of these cements, indicate that both DMAL and DMPT are suitable alternatives to DMPT...
  16. ncbi request reprint Rapid and reliable biomechanical screening of injectable bone cements for autonomous augmentation of osteoporotic vertebral bodies: appropriate values of elastic constants for finite element models
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 82:408-17. 2007
    ..This approach has many advantages over those that are currently being used, which are either characterization of the cement in isolation from the vertebral body or use of cadaveric vertebral bodies...
  17. ncbi request reprint One equivalent electrical circuit is applicable to model the interface between the passive surface layer on an orthopaedic alloy and a biosimulating aqueous solution
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Biomed Mater Eng 17:97-108. 2007
    ..The variation of each of the circuit elements with time of immersion of the specimen in the PBS solution and the study limitation are discussed...
  18. doi request reprint Viscoelastic properties of injectable bone cements for orthopaedic applications: state-of-the-art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 98:171-91. 2011
    ..The objective of this contribution is to present such a review. In addition, a number of ideas for future study in the field of viscoelastic properties of IBCs are described...
  19. doi request reprint Dependence of in vitro fatigue properties of PMMA bone cement on the polydispersity index of its powder
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152, USA
    J Mech Behav Biomed Mater 3:94-101. 2010
    ..Best-fit empirical relationships (1) betweenlnN(WM), S, and PDI, and (2) between the estimated fatigue limit and PDI were obtained. These relationships may be used in the development of new cement powder sterilization methods...
  20. doi request reprint Evaluation of two novel aluminum-free, zinc-based glass polyalkenoate cements as alternatives to PMMA bone cement for use in vertebroplasty and balloon kyphoplasty
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA
    J Mater Sci Mater Med 21:59-66. 2010
    ....
  21. doi request reprint Influence of powder-to-liquid monomer ratio on properties of an injectable iodine-containing acrylic bone cement for vertebroplasty and balloon kyphoplasty
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 91:537-44. 2009
    ..With increase in PLMR, k' increased significantly, but the influence of PLMR on the fatigue limit and on another property also estimated from the S - ln N(f) results is not significant...
  22. doi request reprint Properties of antibiotic-loaded acrylic bone cements for use in cemented arthroplasties: a state-of-the-art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 89:558-74. 2009
    ....
  23. doi request reprint Evaluation of a synthetic vertebral body augmentation model for rapid and reliable cyclic compression life testing of materials for balloon kyphoplasty
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 87:179-88. 2008
    ....
  24. ncbi request reprint Thermal stability of acrylic bone cement powder under shelf storage conditions: an isothermal microcalorimetric study
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomed Mater Eng 18:83-90. 2008
    ....
  25. doi request reprint The use of nanoindentation for characterizing the properties of mineralized hard tissues: state-of-the art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 87:286-301. 2008
    ..This review is designed to present a compact guide to the principles of the nanoindentation technique and to emphasize considerations when determining material properties of mineralized tissues...
  26. doi request reprint Materials, fluid dynamics, and solid mechanics aspects of coronary artery stents: a state-of-the-art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 86:569-90. 2008
    ....
  27. ncbi request reprint Alternative acrylic bone cement formulations for cemented arthroplasties: present status, key issues, and future prospects
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 84:301-19. 2008
    ....
  28. ncbi request reprint Influence of two changes in the composition of an acrylic bone cement on its handling, thermal, physical, and mechanical properties
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    J Mater Sci Mater Med 18:1649-58. 2007
    ..Thus, these findings suggest a strategy for optimizing the composition of an acrylic bone cement...
  29. ncbi request reprint Estimation of the minimum number of test specimens for fatigue testing of acrylic bone cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, TN 38152 3180, USA
    Biomaterials 25:4425-32. 2004
    ..To be on the conservative side, we therefore recommend that Gmin be 11. Three key limitations of the methodology presented here are discussed...
  30. ncbi request reprint Effect of test frequency on the in vitro fatigue life of acrylic bone cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Campus Box 526576, Memphis, TN 38152 3180, USA
    Biomaterials 24:1111-7. 2003
    ..Statistical analysis of the lnN(f) data, together with an examination of the N(WM) estimates, showed support for the hypothesis over the range of f used. The principal use and explanation of the present finding are presented...
  31. ncbi request reprint The relative influence of five variables on the in vitro wear rate of uncrosslinked UHMWPE acetabular cup liners
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomaterials 24:1925-35. 2003
    ..These uses, as well as the study limitations, are discussed in detail...
  32. ncbi request reprint Rheological properties of acrylic bone cement during curing and the role of the size of the powder particles
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res 63:191-9. 2002
    ..Thus, the highest values of t(ons) and CCR were obtained from a cement with the highest values of alpha and beta. An explanation for these trends is given, and two areas for further research work in this field are outlined...
  33. ncbi request reprint Key issues involved with the use of miniature specimens in the characterization of the mechanical behavior of polymeric biomaterials--a review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res 63:455-66. 2002
    ....
  34. ncbi request reprint Properties of crosslinked ultra-high-molecular-weight polyethylene
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomaterials 22:371-401. 2001
    ....
  35. ncbi request reprint Toward standardization of methods of determination of fracture properties of acrylic bone cement and statistical analysis of test results
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, 312 Engineering Science, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res 53:748-68. 2000
    ..A methodology for addressing these deficiencies is presented in the present report, and its use is illustrated with a set of notional fatigue test results...
  36. ncbi request reprint Correlation between impact strength and fracture toughness of PMMA-based bone cements
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 6576, USA
    Biomaterials 21:775-81. 2000
    ..The attractions and drawbacks of this method for determining IS are detailed. The best fit to the K1c and IS results yielded a power relationship K1c = 0.795(IS)(0.59). The usefulness and limitations of this relationship are detailed...
  37. ncbi request reprint Relative roles of cement molecular weight and mixing method on the fatigue performance of acrylic bone cement: Simplex P versus Osteopal
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 6576, USA
    J Biomed Mater Res 53:119-30. 2000
    ..Third, hand-mixed Osteopal outperforms vacuum-mixed Simplex P (especially at low alternating stress levels), indicating that MW(w) of a bone cement is more influential than mixing method on its fatigue performance...
  38. ncbi request reprint Effect of sterilization method on properties of Palacos R acrylic bone cement
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152, USA
    Biomaterials 19:117-24. 1998
    ..Explanations are offered for these findings, and recommendations are submitted regarding the preferred method of sterilization of bone cement and reporting of studies in which different formulations of cement are compared...
  39. ncbi request reprint Fatigue testing and performance of acrylic bone-cement materials: state-of-the-art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 66:457-86. 2003
    ..This enhanced body of knowledge will prove invaluable in the continued use of acrylic bone cement as the anchoring agent in cemented arthroplasties...
  40. ncbi request reprint Effect of test specimen cross-sectional shape on the in vitro fatigue life of acrylic bone cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomaterials 24:4315-21. 2003
    ....
  41. ncbi request reprint Use of isothermal heat-conduction microcalorimetry (IHCMC) for the evaluation of synthetic biomaterials
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152 3180, USA
    J Biomed Mater Res B Appl Biomater 66:487-501. 2003
    ....
  42. ncbi request reprint Geometric element analysis of fretting in a model of a modular femoral component of a hip implant
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis 38152 3180, USA
    Biomed Mater Eng 14:43-51. 2004
    ..It was found that while d and neck material exerted a strong effect on delta, the head material had practically no such effect. The implications of this finding for design and materials selection issues for this connection are discussed...
  43. ncbi request reprint The influence of the viscosity classification of an acrylic bone cement on its in vitro fatigue performance
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomed Mater Eng 14:33-42. 2004
    ....
  44. ncbi request reprint Effect of fabrication pressure on the fatigue performance of Cemex XL acrylic bone cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, TN 38152 3180, USA
    Biomaterials 25:1415-20. 2004
    ..05)...
  45. ncbi request reprint Effect of an accelerated aging protocol on viscoelastic properties of UHMWPE
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomed Mater Eng 12:299-308. 2002
    ....
  46. ncbi request reprint Quasi-static and dynamic nanoindentation studies on highly crosslinked ultra-high-molecular-weight polyethylene
    Kwideok Park
    Department of Biomedical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Biomaterials 25:2427-36. 2004
    ....
  47. pmc An Approach for determining antibiotic loading for a physician-directed antibiotic-loaded PMMA bone cement formulation
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN, USA
    Clin Orthop Relat Res 468:2092-100. 2010
    ..We suggest there is a need to develop a rational method for determining this loading...
  48. ncbi request reprint Effect of crosslinking UHMWPE on its tensile and compressive creep performance
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152-3180, USA
    Biomed Mater Eng 11:167-83. 2001
    ..The implications of the present results, taken together with the aforementioned literature results, are fully discussed vis-a-vis the use of crosslinked UHMWPE for fabricating articular components for arthroplasties...
  49. ncbi request reprint A new, reliable, and simple-to-use method for the analysis of a population of values of a random variable using the Weibull probability distribution: application to acrylic bone cement fatigue results
    Sied Janna
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomed Mater Eng 15:349-55. 2005
    ..The key result of the method is that the two- or three-parameter variant of the probability distribution is applicable if the estimate of V(0) obtained is less than or greater than zero, respectively...
  50. ncbi request reprint Influence of lamella features of UHMWPE on its physical and uniaxial tensile properties. I. Effect of sterilization method in uncrosslinked and unaged materials
    Sanjay Mishra
    Department of Physics, The University of Memphis, Memphis, TN 38152, USA
    Biomed Mater Eng 13:135-46. 2003
    ..It thus appears that the changes seen in the physical and mechanical properties determined may be a reflection of the change in the polymer's lamella alignment...
  51. ncbi request reprint Influences of the temporal nature of the applied load and the tibial baseplate material on the stress distribution in a three-dimensional model of the human knee joint containing a prosthetic replacement
    Satya Narasimha Nambu
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomed Mater Eng 14:203-17. 2004
    ..The significance of these findings as well as the limitations of the study are discussed...
  52. ncbi request reprint Dynamic thermomechanical properties and crystallinity of ultrahigh molecular weight polyethylene tibial inserts
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, Tennessee, USA
    J Biomed Mater Res 43:249-60. 1998
    ..Third, there was a strong direct association between E' and % C. The various potential uses of this association are described, paying special attention to its likely role in predicting the in vivo wear of UHMWPE tibial inserts...
  53. ncbi request reprint Finite element analysis of a model of a therapeutic shoe: effect of material selection for the outsole
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomed Mater Eng 13:75-81. 2003
    ..The implications of this finding are discussed...
  54. ncbi request reprint Determination of the activation energies of and aggregate rates for exothermic physico-chemical changes in UHMWPE by isothermal heat-conduction microcalorimetry (IHCMC)
    Andy Hardison
    Department of Biomedical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Biomaterials 24:5145-51. 2003
    ..However, in vivo, surface wear of an UHMWPE articular component may continue to expose unoxidized free radicals, keeping the exothermic reaction rate high and, possibly, continuing to produce an oxidized UHMWPE surface prone to wear...
  55. ncbi request reprint Effect of loading rate on the apparent fracture toughness of acrylic bone cement
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 3180, USA
    Biomed Mater Eng 12:149-55. 2002
    ..Two implications of the findings are discussed. In the case of Osteopal, a recommendation for further study is made...
  56. ncbi request reprint Numerical analysis of models of the standard TSRH spinal instrumentation: effect of rod cross-sectional shape
    Yingwu Cui
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Comput Methods Biomech Biomed Engin 5:75-80. 2002
    ..This finding points the way to the possibility of using square cross-sectioned rods in the TSRH instrumentation...
  57. ncbi request reprint Evaluation of a performance index of the padding material in an external hip protector
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 316 Engineering Science Building, Memphis, TN 38152, USA
    Biomed Mater Eng 16:359-61. 2006
  58. ncbi request reprint Apparent fracture toughness of acrylic bone cement: effect of test specimen configuration and sterilization method
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, TN 38152 6576, USA
    Biomaterials 20:69-78. 1999
    ..It is thus suggested that either of these configurations can be used to determine the fracture toughness of acrylic bone cement...
  59. ncbi request reprint Influence of strontia on various properties of surgical simplex P acrylic bone cement and experimental variants
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA
    Acta Biomater 3:970-9. 2007
    ..Thus, further developmental work on strontia-containing acrylic bone cements is justified, with a view to making them candidates for use in cemented primary arthroplasties...
  60. ncbi request reprint Preheating acrylic bone cement powder is not recommended for all brands
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee, USA
    J Arthroplasty 22:428-34. 2007
    ..The results suggest judicious selection of cements whose powders are to be preheated for use in cemented arthroplasties...
  61. ncbi request reprint Effect of mixing method on selected properties of acrylic bone cement
    G Lewis
    Department of Mechanical Engineering, University of Memphis, Tennessee 38152, USA
    J Biomed Mater Res 38:221-8. 1997
    ..02 to 7.04%; ultimate compressive strength, 84 to 112 MPa; ultimate compressive strain, 5.1 to 6.4%; and compressive modulus of elasticity, 2249 to 2877 MPa...
  62. ncbi request reprint Defect-induced fatigue microcrack formation in cement mantle
    Gang Qi
    Medical Acoustic Research Laboratory, Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
    J Biomed Mater Res A 75:414-24. 2005
    ..The progress of fatigue microcrack formation occurred over three distinct phases: initiation, transition, and stableness...
  63. doi request reprint Random damage and characteristics of debris particles are two important and yet ignored factors in the mechanical integrity of the stem-cement interface of a total hip replacement: influence of the surface finish of the metal stem
    Gang Qi
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA
    J Mater Sci Mater Med 21:1385-92. 2010
    ..These findings, in conjunction with details on the size and shape of the debris particles, obtained using scanning electron microscopy, lead to the suggestion that satin-finish stems are desirable for use in cemented THRs...
  64. ncbi request reprint Injectable bone cements for use in vertebroplasty and kyphoplasty: state-of-the-art review
    Gladius Lewis
    Department of Mechanical Engineering, The University of Memphis, 312 Engineering Science Building, Memphis, Tennessee 38152, USA
    J Biomed Mater Res B Appl Biomater 76:456-68. 2006
    ..The review ends with a summary of the most salient points and observations made...
  65. doi request reprint Influence of surgical treatment for disc degeneration disease at C5-C6 on changes in some biomechanical parameters of the cervical spine
    Yuan Li
    Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152 3180, USA
    Med Eng Phys 32:595-603. 2010
    ..This finding is in consonance with the evolving clinical practice of using minimally invasive surgical methods for treating problem(s) such as soft cervical disc herniations...
  66. doi request reprint Probabilistic characteristics of random damage events and their quantification in acrylic bone cement
    Gang Qi
    Department of Mechanical Engineering, University of Memphis, Memphis, TN 38152, USA
    J Mater Sci Mater Med 21:2915-22. 2010
    ..This finding explains the effects of RGME on material fatigue performance and may be used to approximate fatigue limit...
  67. ncbi request reprint Isothermal microcalorimetry: an analytical technique for assessing the dynamic chemical stability of UHMWPE
    S J Charlebois
    Department of Orthopaedic Surgery, The University of Tennessee Campbell Clinic, Memphis, TN, USA
    Biomaterials 24:291-6. 2003
    ..These results demonstrate the usefulness of IMC as a viable method for studying the stability of polymeric implant materials...
  68. ncbi request reprint Tensile properties of human tendo Achillis: effect of donor age and strain rate
    G Lewis
    Department of Mechanical Engineering, University of Memphis, TN 38152 6576, USA
    J Foot Ankle Surg 36:435-45. 1997
    ..Based on all results and findings, donor age is suggested as one of the considerations when selecting tendo Achillis to be used as allografts for the repair of severely damaged or ruptured tendo Achillis or anterior cruciate ligament...
  69. ncbi request reprint Biomechanical effects of autonomous augmentation on the adjacent unaugmented vertebral bodies: influence of the number of functional spinal units in a finite element model
    G Lewis
    Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee USA
    J Appl Biomater Biomech 6:144-50. 2008
    ..lt;i><b>Conclusion:</b></i> The results suggest that three is the number of FSUs that should be included in models of the lumbar spine to be used in FEA studies of VP and BKP...
  70. ncbi request reprint Evaluation of a highly-radiopaque iodine-containing acrylic bone cement for use in augmentation of vertebral compression fractures
    Erik J H Boelen
    Center for Biomaterials Research, University of Maastricht, P O Box 616, 6200 MD Maastricht, The Netherlands
    J Biomed Mater Res A 86:76-88. 2008
    ..It is therefore suggested that the IO cement is a suitable alternative to the BA cement for use in the aforementioned procedures...
  71. ncbi request reprint Evaluation of a synthetic bone defect test model to aid in the selection of materials for use in vertebral body compression fracture repair
    Michael Carroll
    Wright Medical Technology, Inc, Arlington, Tenn, USA
    Orthopedics 27:s119-22. 2004
    ..The foam model was a good in vitro representation of actual trabecular bone found in vertebral bodies and is a valid model to evaluate the mechanical strength of injectable cements for percutaneous vertebral body fracture repair...