Above, Below, or Both: How Implant Placement Actually Works, and Why Los Angeles Surgeons Favor the Dual Plane

Ask three consultation coordinators in Los Angeles where an implant should sit and you may hear three different answers delivered with equal confidence. The truth is less about preference and more about anatomy. Implant placement is a mechanical decision: it determines what tissue covers the device, how the pectoralis major muscle interacts with it, and how the result behaves over years of gravity, exercise, and aging. Understanding the three main options, and the trade-offs each one carries, makes a consultation far more productive.

Subglandular placement puts the implant directly behind the breast gland and in front of the pectoralis major muscle. The appeal is straightforward. The muscle is untouched, so early recovery tends to be less sore, and the implant moves naturally with the breast tissue rather than with muscle contraction. The problem is coverage. In a patient with thin skin and minimal native breast tissue, common among lean patients, the only thing between the implant edge and the outside world is gland and skin. That raises the odds of visible rippling, a palpable implant edge, and a rounded upper pole that can read as artificial. Subglandular placement also carries a somewhat higher reported rate of capsular contracture with smooth implants in older literature, a finding often attributed to less tissue buffering around the device. It remains a reasonable choice for patients with generous existing breast tissue, roughly two centimeters or more of pinch thickness at the upper pole, and for certain athletes who want to avoid muscle involvement entirely.

Full submuscular placement, in its strict sense, means the implant is covered by the pectoralis major above and additional muscle or fascia below. In practice, true total muscle coverage is uncommon in cosmetic augmentation because it constrains lower pole expansion and can push the implant upward over time. The version most people mean when they say "under the muscle" is actually partial coverage: the upper portion of the implant sits beneath the pectoralis, the lower portion does not.

That brings us to the dual plane technique, which has become the default recommendation in many Los Angeles practices for a reason grounded in mechanics rather than fashion. In a dual plane approach, the surgeon releases the pectoralis major along its lower attachments so the muscle covers the upper half to two thirds of the implant while the lower pole of the implant sits directly behind the gland. The result is a hybrid. The upper pole gets muscle coverage, which softens the transition from chest wall to implant and reduces visible edges and rippling where skin is thinnest. The lower pole gets direct implant-to-gland contact, which allows the breast to expand naturally and helps the implant settle into the existing breast footprint instead of riding high.

Surgeons describe dual plane in gradations, often labeled types one through three, based on how much the muscle is released and how much the gland is separated from the muscle surface. A minimal release suits a patient with tight tissue and little sag. A more aggressive release suits a patient with mild drooping, called glandular ptosis, because it lets the implant fill loose lower pole skin rather than sitting above it, which is the mechanism behind the dreaded "double bubble" or waterfall appearance when placement and tissue do not match.

The trade-offs of any submuscular or dual plane approach deserve honest mention. Recovery involves more early discomfort because muscle fibers are released and stretched. And because the pectoralis remains attached over the upper implant, contracting the muscle, as in a push-up or chest press, can visibly shift or distort the implant. This is called animation deformity. For most patients it is a minor cosmetic quirk visible only during hard chest activation. For competitive lifters, physique athletes, or performers, it can matter enough to reconsider a subglandular or subfascial plane, accepting thinner coverage in exchange for a motionless result.

A fourth option, subfascial placement, positions the implant beneath the thin fascia covering the pectoralis but above the muscle itself. Advocates argue the fascia adds modest support and edge camouflage without muscle involvement. Skeptics note the fascia is only about half a millimeter thick in most patients, so the coverage benefit is real but small. It occupies a middle ground and depends heavily on surgeon familiarity with the dissection.

So how should a patient in Los Angeles weigh this? Start with tissue, not preference. A pinch test at the upper pole, an honest assessment of skin laxity, and a discussion of your activity profile will point toward a plane more reliably than any trend. Thin tissue pushes toward muscle coverage. Existing sag pushes toward a dual plane with adequate release. Heavy chest training pushes the conversation toward subglandular or subfascial, or toward accepting some animation.

One last note on longevity. No pocket choice is permanent insurance. Tissue thins with age and weight change, and an implant that was well covered at thirty may show edges at fifty. The best placement decision is the one matched to your anatomy today with a realistic eye on how that anatomy will change, which is exactly the conversation a thorough consultation should center on.

Related reading: Over, Under, or In Between: How Implant Placement Plane Actually Changes Your Result.