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Reticular Dermis01:15

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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Acellular Dermal Matrix without Basement Membrane in Immediate Prepectoral Breast Reconstruction: A Randomized

Woo Yeon Han1, Dong Jin Kim2, Young Soon Lee2

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Acellular dermal matrix (ADM) without basement membrane is safe for breast reconstruction, showing similar outcomes to ADM with basement membrane. ADM without basement membrane offers improved elasticity for natural results.

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Area of Science:

  • Plastic Surgery
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Acellular dermal matrix (ADM) is widely used in reconstructive surgery.
  • ADM properties vary based on basement membrane presence, impacting elasticity crucial for breast reconstruction.
  • Limited data exists on the clinical efficacy of ADM lacking a basement membrane.

Purpose of the Study:

  • To compare clinical outcomes of acellular dermal matrix (ADM) with and without basement membrane in breast reconstruction.
  • To evaluate the safety and effectiveness of ADM variants for soft-tissue reconstruction.
  • To assess the impact of basement membrane on ADM mechanical properties and patient outcomes.

Main Methods:

  • Single-blind randomized controlled trial involving 56 patients undergoing immediate prepectoral direct-to-implant breast reconstruction.
  • Patients were randomized into two groups: ADM with basement membrane (n=30) or ADM without basement membrane (n=26).
  • Comparison of demographic characteristics, surgical outcomes, complication rates, and breast shape changes (nipple position).

Main Results:

  • No statistically significant differences in overall complication rates or breast shape changes were observed between the groups.
  • A higher incidence of seromas was noted in the ADM with basement membrane group (10%) compared to the ADM without basement membrane group (0%, P=0.09).
  • Clinical and surgical characteristics were comparable between the two ADM types.

Conclusions:

  • ADM without basement membrane is a safe option for implant-based breast reconstruction.
  • ADM variants demonstrated similar surgical outcomes, with no significant difference in complications or aesthetics.
  • ADM without basement membrane exhibits favorable mechanical properties, including lower tensile strength and higher elasticity, potentially enhancing natural breast reconstruction.