Breast Implant Placement: Over- vs Under-Muscle vs Dual-Plane

Breast augmentation can improve breast fullness, shape, projection and symmetry. If you are not happy with the shape of your figure or your proportions, surgery can prove a worthwhile way to raise your confidence and improve your self-image. If you are considering breast implants, you…

Breast augmentation can improve breast fullness, shape, projection and symmetry. If you are not happy with the shape of your figure or your proportions, surgery can prove a worthwhile way to raise your confidence and improve your self-image.

If you are considering breast implants, you will want natural-looking results and a fast recovery. But, how is this achieved? Dr. Chad Wu will complete a thorough evaluation of your aesthetic goals, chest muscle anatomy and breast tissue thickness to determine the best course of action.

One key factor in the success of your surgery will be the placement of your breast implants. Your surgeon will be considering dual-plane vs over- vs under-muscle breast implants.

Learn the difference between these placements, how they work, and which will meet your surgery goals in this guide from Dr. Chad Wu, MD, an experienced and quadruple-certified plastic surgeon based in Toronto. Consider how implant placement affects shape, size, recovery and post-surgery life. 

Key Takeaways

  • Breast implant placement helps determine the fullness, shape and slope of your breasts after surgery.
  • Dual-plane placement is most popular because it offers your surgeon the greatest control over your results, although over-muscle or under-muscle placement may be better suited in some instances.
  • Your surgeon will consider your augmentation goals, anatomy and lifestyle to choose the right placement for you.

Table of Contents

The fundamental difference between dual-plane vs over- vs under-muscle breast implants is where they sit in relation to your chest muscle, the pectoralis major.

Over-Muscle Breast Augmentation Explained

Over-muscle implants sit on top of the pectoralis major but under the breast tissue. This placement is also called sub-glandular.

There is no need to cut the muscle, so this surgery is less invasive than other breast augmentation procedures. Moderately full breast tissue will cover the edges of the implants for a natural look.

Under-Muscle Breast Augmentation Explained

Under-muscle implants sit fully behind the pectoralis major. This placement is also known as sub-muscular or below-muscle.

Because the muscle is cut and stretched, under-muscle placements are more invasive and becoming less popular. However, women with thin breast tissue will achieve better results with under-muscle breast augmentation as the muscle provides an additional layer of coverage for the implant.

Dual-Plane Breast Augmentation Explained

Dual-plane is a modern hybrid approach that involves placing the upper part of the implant behind the muscle and the lower part behind breast tissue.

Where your implants are placed in relation to the chest muscle has a big impact on breast shape and projection.

Over-muscle implants can give the fullest, roundest results, especially in the upper pole of the breast. But, unless breast tissue is thick, there’s a chance that this placement will not look as natural as possible. There’s a risk of rippling for thinner patients.

Under-muscle implants provide natural-looking results. There will be a subtle slope to the breast and minimal risk of noticeable implant rippling.

A major benefit of dual-plane implant placement is that the method combines a natural-looking slope with a slight breast lift, which may be your preference if your breasts are beginning to sag.

The dual-plane method allows better contour control and lower breast release. Dual-plane placement can achieve better symmetry and precise final results to meet the patient’s goals.

The varying complexity of surgery and other factors make a difference to your recovery and post-surgical life. Here are some of the most important considerations.

Recovery Time

  • Over-muscle implants offer the shortest recovery time and less post-op discomfort.
  • Under-muscle and dual-plane surgery cause more soreness because the chest muscle is disturbed, but dual-plane surgery is less invasive, so it will aid in better recovery times.

Sport and Exercise

  • Over-muscle implants may be preferred by people who do heavy chest workouts because the implant doesn’t sit beneath the pectoral muscle, reducing the risk of animation deformity.
  • Under‑muscle and dual‑plane implants may shift or distort during chest‑focused movements.

Risks

  • Capsular contracture: Scar tissue becomes too thick and tight and squeezes the implant, a risk shared by all placement types.
  • Visible rippling: Most often associated with over-muscle implants.
  • Animation deformity: Breast implants can distort when placed under chest muscles,.

Who is more likely to experience animation deformity, and how is it managed?

Animation deformity can occur in patients with under-muscle or dual-plane implant placement. Patients who do frequent, heavy chest workouts are at higher risk. In some cases, revision surgery or switching to an over-muscle placement may be recommended to manage significant distortion.

Does implant placement change cleavage and upper-pole fullness?

Yes, implant placement has a direct impact on cleavage and upper-pole fullness. Over-muscle placement typically produces the greatest upper-pole volume and a rounder appearance. Under-muscle and dual-plane placements create a more natural slope, with less projection in the upper pole.

Does placement affect mammograms or breast screening?

Implant placement can influence how mammograms are performed and interpreted. Under-muscle and dual-plane placements tend to interfere less with breast tissue imaging, as the muscle provides separation between the implant and the breast.

Over-muscle implants sit closer to breast tissue, which may require additional imaging views. Patients should always inform their mammography technician that they have implants so the appropriate technique can be used.

Breast implant placement decisions should be made after consultation with your surgeon.

Dr. Chad Wu, MD, assesses each patient’s anatomy and aesthetic goals to determine which placement will achieve the most balanced, natural-looking result.

To discuss breast augmentation with a quadruple board-certified plastic surgeon, contact our office to schedule a consultation today.

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*Results may vary. This content is for informational purposes only and does not constitute medical advice. Consult a qualified physician before making any decisions.*