title: Comparative biomechanical study of using decellularized human adipose tissues for post-mastectomy and post-lumpectomy breast reconstruction.
abstract: Developing suitable biomaterials for post-mastectomy or post-lumpectomy breast reconstruction is highly important. This study is aimed at evaluating biomechanical suitability of decellularized adipose tissue (DAT) for this purpose. The study involves computational experiments for evaluating deformation of the breast reconstructed using DAT under loading conditions pertaining to two common body position changes of prone-to-supine and prone-to-upright. This was conducted using nonlinear finite element models where the breast geometry was obtained from MRI image of a female breast. The experiments were performed using DAT sourced from various adipose tissue depots in comparison to natural adipose tissue. Data obtained from the conducted experiments showed no contour defects with various DAT materials for simulated post-mastectomy or post-lumpectomy breast reconstruction under the loading conditions. They also demonstrated that a breast reconstructed using DAT derived from the breast or subcutaneous abdominal depots exhibit significantly closer deformation, both qualitatively and quantitatively, to that of a normal breast under the same loading conditions. Similarity of DAT deformation to that of natural breast tissue in post-surgery breast reconstruction was assessed using nonlinear finite element analysis. Our results provide evidence that DAT derived from subcutaneous abdominal and breast depots yield more analogous deformation pattern to the natural tissue in post-mastectomy breast reconstruction applications. This is quite encouraging, as breast and subcutaneous adipose tissue can be readily obtained in large quantities from breast or abdominal lipo-reduction surgery procedures. Furthermore, in post-lumpectomy cases all DAT samples used in this research showed similar deformation, and thus are suitable as breast tissue substituents.
authors.affiliation: Biomedical Engineering Program, University of Western Ontario, London, Ontario, Canada.
authors.forename: Seyyed M H
authors.initials: SM
authors.lastname: Haddad
authors.affiliation: Biomedical Engineering Program, University of Western Ontario, London, Ontario, Canada.
authors.forename: Ehsan
authors.initials: E
authors.lastname: Omidi
authors.affiliation: Biomedical Engineering Program, University of Western Ontario, London, Ontario, Canada; Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, Canada; Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, Canada.
authors.forename: Lauren E
authors.initials: LE
authors.lastname: Flynn
authors.affiliation: Biomedical Engineering Program, University of Western Ontario, London, Ontario, Canada; Department of Medical Biophysics, University of Western Ontario, London, Ontario, Canada; Department of Electrical and Computer Engineering, University of Western Ontario, London, Ontario, Canada; Imaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada. Electronic address: asamani@uwo.ca.
authors.forename: Abbas
authors.initials: A
authors.lastname: Samani
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D001696:Biomechanical Phenomena; D001940:Breast / Q000166:cytology* / Q000601:surgery*; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D016462:Mammaplasty / Q000379:methods*; D015412:Mastectomy, Segmental; D055595:Mechanical Phenomena; D011184:Postoperative Period
keywords: Biomechanical modeling; Breast reconstruction; Decellularized adipose tissue; Finite element analysis