Background: Breast implants are biomaterials eliciting a physiological and mandatory foreign body response. Objectives: The authors designed an animal study to investigate the impact of different implant surfaces on the formation of the periprosthetic capsule, the inflammatory response, and the cellular composition. Methods: The authors implanted 1 scaled-down version of breast implants by different manufactures on 70 female Sprague Dawley rats. Animals were divided into 5 groups of 14 animals. Group A received a smooth implant (Ra ≈ 0.5 µm) according to the ISO 14607-2018 classification, Group B a smooth implant (Ra ≈ 3.2 µm), Group C a smooth implant (Ra ≈ 5 µm), Group D a macrotextured implant (Ra ≈ 62 µm), and Group E a macrotextured implant (Ra ≈ 75 µm). At 60 days, all animals received a magnetic resonance imaging (MRI), and 35 animals were killed and their capsules sent for histology (capsule thickness, inflammatory infiltrate) and immunohistochemistry analysis (cellular characterization). The remaining animals repeated the MRI at 120 days and were killed following the same protocol. Results: MRI showed a thinner capsule in the smooth implants (Groups A-C) at 60 days (P < .001) but not at 120 days (P = .039), confirmed with histology both at 60 days (P = .005) and 120 days (P < .001). Smooth implants (Groups A-C) presented a mild inflammatory response at 60 days that was maintained at 120 days and a high M2-Macrophage concentration (anti-inflammatory). Conclusions: Our study confirms that smooth implants form a thinner capsule, inferior inflammatory infiltrate, and a cellular composition that indicates a mild host inflammatory response. A new host inflammatory response classification is elaborated classifying breast implants into mild, moderate, and high.

Study of the effect of different breast implant surfaces on capsule formation and host inflammatory response in an animal model / SANTANELLI DI POMPEO, Fabio; Sorotos, Michail; Rossella, Canese; Mauro, Valeri; Cirombella, Roberto; Scafetta, Giorgia; Firmani, Guido; DI NAPOLI, Arianna. - In: AESTHETIC SURGERY JOURNAL. - ISSN 1090-820X. - (2023). [10.1093/asj/sjac301]

Study of the effect of different breast implant surfaces on capsule formation and host inflammatory response in an animal model

Fabio Santanelli di Pompeo
;
Michail Sorotos;Cirombella Roberto;Scafetta Giorgia;Guido Firmani;Arianna di Napoli
2023

Abstract

Background: Breast implants are biomaterials eliciting a physiological and mandatory foreign body response. Objectives: The authors designed an animal study to investigate the impact of different implant surfaces on the formation of the periprosthetic capsule, the inflammatory response, and the cellular composition. Methods: The authors implanted 1 scaled-down version of breast implants by different manufactures on 70 female Sprague Dawley rats. Animals were divided into 5 groups of 14 animals. Group A received a smooth implant (Ra ≈ 0.5 µm) according to the ISO 14607-2018 classification, Group B a smooth implant (Ra ≈ 3.2 µm), Group C a smooth implant (Ra ≈ 5 µm), Group D a macrotextured implant (Ra ≈ 62 µm), and Group E a macrotextured implant (Ra ≈ 75 µm). At 60 days, all animals received a magnetic resonance imaging (MRI), and 35 animals were killed and their capsules sent for histology (capsule thickness, inflammatory infiltrate) and immunohistochemistry analysis (cellular characterization). The remaining animals repeated the MRI at 120 days and were killed following the same protocol. Results: MRI showed a thinner capsule in the smooth implants (Groups A-C) at 60 days (P < .001) but not at 120 days (P = .039), confirmed with histology both at 60 days (P = .005) and 120 days (P < .001). Smooth implants (Groups A-C) presented a mild inflammatory response at 60 days that was maintained at 120 days and a high M2-Macrophage concentration (anti-inflammatory). Conclusions: Our study confirms that smooth implants form a thinner capsule, inferior inflammatory infiltrate, and a cellular composition that indicates a mild host inflammatory response. A new host inflammatory response classification is elaborated classifying breast implants into mild, moderate, and high.
2023
BIA-ALCL; breast implants; animal study; breast implant safety; rats
01 Pubblicazione su rivista::01a Articolo in rivista
Study of the effect of different breast implant surfaces on capsule formation and host inflammatory response in an animal model / SANTANELLI DI POMPEO, Fabio; Sorotos, Michail; Rossella, Canese; Mauro, Valeri; Cirombella, Roberto; Scafetta, Giorgia; Firmani, Guido; DI NAPOLI, Arianna. - In: AESTHETIC SURGERY JOURNAL. - ISSN 1090-820X. - (2023). [10.1093/asj/sjac301]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1676144
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