Breast Fat Grafting

Power-assisted harvest that protects the fat cells as they are removed.

Fat is harvested using a MicroAire power-assisted system. The gentle, low-trauma action of power-assisted harvest removes fat efficiently while minimising the mechanical shear forces that damage fat-cell membranes — protecting the viability of both the adipocytes and the regenerative stromal cells they carry.

Donor sites are chosen where fat is reliably abundant — commonly the abdomen, flanks, or thighs — which also provides a contouring benefit at the donor area. A low-trauma harvest is the first determinant of graft survival, and it is treated as such.

Purifying the harvested fat to a clean, concentrated graft.

The harvested fat is processed through the REVOLVE system, which filters and washes the aspirate to separate clean, intact fat from blood, oil, and cellular debris. Removing these components is not a cosmetic step — blood and disrupted cells actively reduce graft survival and increase the risk of cyst formation and oil necrosis.

The result of processing is a purified, concentrated graft of high cellular viability, prepared in a closed system that limits handling and exposure.

Particle sizing matched to structural breast grafting.

For breast grafting, the processed fat is prepared and transferred at a calibrated particle size — in the region of 1200-2400 microns. Structural breast volume calls for larger fat parcels than the fine emulsified preparations used for delicate facial work: larger parcels carry the structural volume the breast requires, while remaining small enough to establish a blood supply when distributed correctly.

Matching the particle size to the task — structural volume in the breast — is one of the technical decisions that most influences both the predictability and the longevity of the result.

Small parcels, many fine passes — the key to graft take.

The processed fat is placed into the breast in small parcels through many fine passes, distributed across multiple tissue planes. The principle is straightforward and biologically grounded: each small thread of grafted fat must lie close to a blood supply to survive. Large boluses of fat deposited together cannot be reached by enough blood vessels, and the centre of such a deposit dies, forming a cyst or an area of fat necrosis.

Accurate, distributed placement — informed by Dr Sparks’ understanding of the vascular demands of grafted tissue — is what converts a well-harvested, well-processed graft into a result that survives and endures.

Modest enlargement, asymmetry correction, and shape adjustment.

Breast fat grafting can provide a mild-moderate increase in breast size; correct differences in size or shape between the two breasts; soften a rippling or a visible implant edge; and soften the contour of the breast after other surgery. The degree of volume change achievable in a single session is modest by nature — fat grafting adds volume rather than dramatically enlarges.

Combination with an implant, or grafting across more than one session.

Fat grafting can be combined with a breast implant — composite augmentation — where the fat softens the transition and edges of the implant and softens the contour of the result. It can also be staged across more than one session to build volume progressively, since a proportion of each graft is resorbed. The appropriate plan is discussed individually.

Swelling at both breast and donor sites, supportive garments.

• Swelling and bruising at the donor sites — typically the more noticeable discomfort — settle over one to two weeks.
• The breast is swollen and tender; a supportive bra is worn, and pressure on the grafted breast is avoided to protect the graft.
• Most patients return to non-strenuous work within one week, depending on the volume harvested.

Resolution of swelling and graft stabilisation.

• Donor-site and breast swelling continue to settle; the early appearance of the breast becomes clearer.
• Light activity is gradually resumed; strenuous exercise is deferred until around six weeks.
• Some early reduction in breast volume is expected and normal as the non-surviving portion of the graft is resorbed.

Final graft take and settled result.

• The grafted fat establishes its final, stable volume by around three months — the fat that survives at this point is durable.
• The settled result is assessed at three to six months; a further grafting session may be considered if more volume is desired.
• The fat that has integrated behaves as the patient’s own breast tissue and ages naturally with the body.

Breast fat grafting transfers a patient’s own fat — harvested by liposuction from an area where it is in excess — to the breast, where it integrates as living tissue. It is used for a modest, natural increase in breast volume, to correct asymmetry, to adjust the contour, or to soften the appearance of an implant, all using the body’s own tissue.

Fat grafting succeeds or fails on whether the transferred fat survives — and survival is a biological problem. Dr Sparks holds a PhD in Regenerative Medicine, with research focused on tissue engineering and the mechanisms of tissue repair. That background directly informs how the fat is harvested, processed, sized, and placed, so that the maximum proportion of it establishes a blood supply and endures. It is the difference between fat grafting as a technique and fat grafting as a scientific discipline.

MicroAire is a power-assisted harvesting system that removes fat gently, minimising the shear forces that damage fragile fat cells. The REVOLVE system processes the harvested fat — filtering and washing it to separate clean, viable fat from blood, oil, and debris that would otherwise reduce graft survival. The processed fat is then transferred at a calibrated particle size suited to structural breast grafting, and placed accurately in small parcels across multiple planes to maximise its survival.

Breast fat grafting produces a modest, natural increase in volume rather than a dramatic enlargement. The amount achievable in one session is limited by how much fat can be safely placed and survive, and a proportion of the graft is naturally resorbed. More than one session may be needed to reach the desired volume. If a significant size increase is the goal, an implant — alone or combined with fat — may be more appropriate, and Dr Sparks will discuss this honestly.

The fat that successfully establishes a blood supply and survives — assessed by around three months — is durable. It becomes living breast tissue and behaves as the patient’s own fat, ageing naturally with the body. The portion of the graft that does not survive is resorbed in the early months, which is why some reduction in volume after surgery is expected and normal.

Fat grafting can produce small areas of firmness, calcification, or fat necrosis as some grafted fat heals, and these can appear on breast imaging. This does not prevent breast screening, but it is important that any future mammogram or ultrasound is interpreted by a radiologist who is aware that fat grafting has been performed. Dr Sparks discusses this openly so you can inform your screening provider.