title: Stealthy role of size-driven stresses in biomechanics of breast implants capsular contracture.
abstract: Breast Capsular Contracture (BCC) is one of the adverse complications occurring with greater incidence in breast augmentation surgical procedures. Its formation can be interpreted as the conclusive result of the physiological process known as response to a foreign body. From a biochemical standpoint, the formation of the peri-prosthetic capsule is certainly a multifactorial process: many hypotheses concerning its etiology have been suggested in the literature and a number of related pharmacological protocols have been consequently proposed to clinically treat this pathology with the aim to prevent further complications and avoid future re-interventions. However, the vast majority of these theories seems to be only partially supported by clinical outcomes and thus a shared opinion on this matter is still absent among specialists. Within this framework, by starting from clinical observations which highlighted an unexpected correlation between histo-morphological features of fibrotic capsules and overall size of breast implants, the present study investigates the hypothesis that the biomechanical interaction between prosthesis and host tissue may play a crucial role in the biological processes governing the pathological phenomenon at hand. Therefore, to shed light on the underlying mechanisms which could trigger the breast capsular contracture, both simple analytical solutions, in which elasticity and growth are simultaneously taken into account, and more accurate geometrically faithful Finite Element-based numerical simulations have been exploited. The theoretical findings demonstrate that somehow counter-intuitive radial and hoop stress fields occur at the capsula-implant interface in a way such that their combined action, independently from other possible concurrent factors, results significantly amplified for small-size breast prostheses, localized stress peaks in these cases promoting detaching and rippling phenomena actually observed in BCC clinical complications.
authors: Department of Structures for Engineering and Architecture, University of Naples Federico II, Italy; Interdisciplinary Research Center for Biomaterials, University of Napoli Federico II, Italy. Electronic address: fraldi@unina.it.
authors: Massimiliano
authors: M
authors: Fraldi
authors: Department of Structures for Engineering and Architecture, University of Naples Federico II, Italy.
authors: Luca
authors: L
authors: Esposito
authors: Department of Structures for Engineering and Architecture, University of Naples Federico II, Italy; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Italy.
authors: Arsenio
authors: A
authors: Cutolo
authors: Department of Structures for Engineering and Architecture, University of Naples Federico II, Italy; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Italy.
authors: Angelo Rosario
authors: AR
authors: Carotenuto
authors: Trincay Medical Centre, Grand Cayman, Cayman Islands.
authors: Ciro
authors: C
authors: Adamo
authors: Department of Plastic Surgery, University of Naples Federico II, Italy.
authors: Guido
authors: G
authors: Molea
mesh_terms: D001696:Biomechanical Phenomena; D001940:Breast / Q000601:surgery; D018427:Breast Implants / Q000009:adverse effects*; D003286:Contracture; D005260:Female; D006801:Humans
keywords: Biomechanics; Breast implant augmentation; Capsular contracture