Implantes Lisos con Estabilidad Posicional: Un Modelo Submuscular In Vivo

Área de la Ciencia:

• Biomaterials Science
• Plastic Surgery
• Regenerative Medicine

Sus antecedentes:

• Textured breast implants, previously favored for stability, were recalled due to BIA-ALCL risk.
• This led to a need for stable yet safe implant alternatives.
• Novel Positionally Stable Smooth Implants (PSSI) with surface wells were developed to promote tissue ingrowth and stability.

Objetivo del estudio:

• To evaluate the positional stability and tissue response of PSSI in a submuscular placement model.
• To compare PSSI performance against traditional smooth and textured implants.

Principales métodos:

• Miniature PSSI, smooth, and textured implants were fabricated from polydimethylsiloxane.
• Implants were surgically placed under the latissimus dorsi muscle in rats.
• Implant position, capsule collagen density, and macrophage expression were analyzed over 12 weeks.

Principales resultados:

• PSSI demonstrated significantly reduced rotation compared to smooth implants and comparable stability to textured implants.
• PSSI and textured implants showed lower collagen density and myofibroblast presence than smooth implants.
• PSSI exhibited reduced pro-inflammatory M1 macrophage expression compared to textured implants.

Conclusiones:

• PSSI provide superior rotational stability in the submuscular plane compared to smooth implants.
• PSSI elicit a less inflammatory response and reduced fibrotic capsule formation than traditional textured implants.
• PSSI represent a promising alternative to textured implants for enhanced safety and stability.