Prepectoral direct-to-implant (DTI) reconstruction has become a mainstay of implant-based breast reconstruction, and the biological matrix is central to executing it well. This article gives a high-level overview of how a biological matrix is used in prepectoral DTI, aimed at a professional audience. It is not a surgical protocol or a substitute for the device instructions for use, training, or your own clinical judgement.
Patient selection first
Technique cannot rescue poor selection. Prepectoral DTI generally favours patients with viable, well-perfused mastectomy skin flaps and adequate soft-tissue thickness. Intraoperative assessment of flap perfusion — clinical judgement, and where available perfusion imaging — is a common decision point. Prior or planned radiotherapy, heavy smoking history and very thin flaps all raise the threshold. The matrix supports the implant; it does not compensate for compromised skin.
The role of the matrix in the pocket
In prepectoral placement the implant sits in the anatomical pocket above the pectoralis, so the matrix takes on the support and coverage role the muscle would otherwise share. Broadly, matrices are used either as a partial sling supporting the lower pole or as full anterior/circumferential coverage that wraps the device. The choice affects pocket control, edge transition, and how forces are distributed. A matrix with reliable mechanical strength and good suture retention — properties associated with bovine pericardium — helps maintain a defined, stable pocket.
Principles that recur in good technique
- Tension and apposition. The matrix should support without excessive tension, maintaining contact with the host tissue to encourage integration.
- Dead-space and seroma management. Meticulous haemostasis, appropriate fixation and drain strategy address the seroma risk associated with matrix use.
- Implant-to-skin relationship. With the device closer to the skin, edge control and the option of adjunctive fat grafting matter for the final contour.
- Sterility and handling. Preparation and handling per IFU support both integration and infection control.
Where fat grafting fits
Prepectoral results often depend on soft-tissue quality over the implant. Structural support from the matrix and staged fat grafting are complementary: the matrix defines and supports the pocket, while grafting refines contour and camouflages edges, frequently as a later step once the reconstruction has settled. Graft quality is influenced by processing — a rationale for fat dialysis systems designed to preserve fat integrity and the SVF.
Postoperative considerations
Postoperative management is part of technique, not an afterthought. Drain strategy, monitoring for early seroma and haematoma, infection vigilance and clear escalation pathways all bear on outcomes in matrix-assisted reconstruction. Because the device sits close to the skin in prepectoral placement, early recognition of flap compromise is particularly important, since exposure of the implant or matrix is a serious event. Patient education on warning signs supports early presentation.
Common pitfalls
Recurring pitfalls in prepectoral DTI tend to cluster around a few themes: over-selecting patients with marginal flaps; excessive tension on the matrix or closure; inadequate haemostasis and dead-space control feeding seroma; and under-appreciating the soft-tissue coverage needed for a good contour, where planned fat grafting would have helped. Most of these are addressable at the selection and planning stage — which is where the most consequential decisions are made.
The bottom line
In prepectoral DTI, the biological matrix is the technology that substitutes for muscle coverage — so selection, matrix properties, pocket control and soft-tissue management all matter. Used with sound technique and, where appropriate, adjunctive fat grafting, a robust integrating matrix such as ExaShape supports predictable, muscle-sparing reconstruction. See the prepectoral overview for the patient-facing companion.
This is a general professional overview, not a surgical protocol. Follow current training, guidelines and the device instructions for use.
Important information This article is general education, not medical advice. Tap to read the full medical, regulatory & legal notice.
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Last reviewed: July 23, 2026.
