Failure of femoral neck system in Pauwels type III fracture: a fractography and finite element study

Long-term bond strength stability of novel organic–inorganic hybrid sol–gel coatings applied to titanium and cobalt-chromium alloys

Bone cements are used for numerous orthopedic surgeries and other medical procedures. These cements help hold implants in place and provide structural integrity and fill void spaces to enhance the success of implant operations. Hydroxyapatite (HA) is one of the most used types of bone cement with global sales in the hundreds of millions of dollars and a strong expected growth over the next decade as new clinical uses for bone cement are pursued and the products themselves are further developed to mitigate drawbacks to its use. 

Hydroxyapatite bone cement: an in-depth analysis of the process, recent developments, and future considerations

Hinged total knee arthroplasty (TKA) is a valid option to treat patients during revision of an implant; however, in case of varus/valgus deformity, the force transmission from the femur to the tibia could be altered and therefore the performance of the implant could be detrimental. To be able to evaluate this, the goal of this study was to investigate, using a validated finite element analysis, the effect of varus/valgus load configurations in the bones when a hinged TKA is used. In detail, short and long stem lengths (50 mm, and 120 mm), were analyzed both under cemented or press-fit fixation under the following varus and valgus deformity: 5°, 10°, 20°, and 30°. The main outputs of the study were average bone stress in different regions of interest, together with tibio-femoral contact pressure and force. Results demonstrated that changes in the varus or valgus deformity degrees induce a change in the medio-lateral stress and force distribution, together with a change in the contact area. The effect of stem length and cement do not alter the tibio-femoral contact biomechanics but its effect is mainly localized in the distal femoral region, and it is negligible in the proximal regions.

/pdf/biomechanical-analysis-of-femoral-stem-features-in-hinged-22mpczc8.pdf

Biomechanical Analysis of Femoral Stem Features in Hinged Revision TKA with Valgus or Varus Deformity: A Comparative Finite Elements Study

Initial Damage Analysis in Bone Cement-Stem Debonding Procession of Cemented Hip Arthroplasty

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Initial Damage Analysis in Bone Cement-Stem Debonding Procession of Cemented Hip Arthroplasty