Implant Placement · 1 of 4
Subglandular placement
Implant positioned over the pectoralis muscle, directly under breast tissue. Best for patients with substantial overlying tissue, athletes concerned about animation deformity, and faster-recovery priorities. Approximately 10-15% of modern primary augmentation.
Clinical summary
Subglandular placement positions the implant on top of the pectoralis muscle, directly under breast tissue. Advantages: no animation deformity (relevant for athletes), faster recovery, immediate visible projection. Disadvantages: more visible implant edges in thin patients, higher historical capsular contracture rates. Best fit: patients with substantial overlying breast tissue (over 3 cm pinch), athletes with developed pectoralis muscles, patients prioritising faster recovery. Approximately 10-15% of primary augmentation in modern practice.
The four placement options
| Placement | Position | Best for |
|---|
| Subglandular | Over the muscle, under breast tissue | Patients with substantial breast tissue; athletes |
| Submuscular | Under the pectoralis major muscle | Thin patients needing maximum coverage |
| Dual plane | Upper portion submuscular, lower released | Most patients — modern default |
| Subfascial | Under deep fascia, over muscle | Specific cases; less commonly used |
Placement determines how the implant interacts with surrounding tissue — visibility of edges, capsular contracture risk, animation deformity (movement during muscle contraction), and the natural appearance and feel of the result. Dual plane is the most common in modern practice; pure submuscular and subglandular have specific indications.
Subglandular anatomy
The breast has multiple anatomic layers from front to back:
- Skin and subcutaneous fat
- Breast tissue (mammary gland)
- Subglandular space (potential space — created surgically)
- Pectoralis major muscle
- Pectoralis minor and chest wall
Subglandular placement creates a pocket in layer 3 — between breast tissue and pectoralis muscle. The pocket is dissected without disrupting the underlying muscle, allowing faster recovery.
The pinch test for candidacy
The single most important test for subglandular candidacy: the pinch test at the upper breast pole.
| Pinch test result | Subglandular suitability |
|---|
| Less than 2 cm | Not recommended — implant edges will be visible |
| 2-3 cm | Borderline — discuss alternatives (dual plane preferred) |
| 3+ cm | Good candidate — adequate coverage |
| 4+ cm | Excellent candidate — generous coverage |
The pinch test measures the thickness of skin + subcutaneous fat + breast tissue at the upper breast pole. Adequate thickness masks the implant edge; insufficient thickness shows it as visible folding or rippling.
Animation deformity relevance
Animation deformity is the implant movement that occurs with pectoralis muscle contraction. For patients with submuscular or dual-plane placement, animation is variable but typically mild. For athletes, fitness enthusiasts, or patients with developed pectoralis muscles, animation can be significantly disruptive:
- Weight-lifting — bench press, push-ups, dips show visible implant displacement.
- Dance and martial arts — fast pectoralis contractions visible.
- Photography and modeling — animation can be captured in poses.
- Daily activities — for some patients, even normal arm movements produce visible animation.
Subglandular placement eliminates animation entirely — the implant is independent of muscle, doesn't move with contraction. For patients prioritising no animation, subglandular is the answer regardless of other factors.
Recovery timeline
Subglandular recovery is typically faster than submuscular due to no muscle dissection:
- Day 0-3 — initial discomfort milder than submuscular; less muscle pain.
- Day 7-10 — office work return for most patients.
- Week 2 — light cardio resumption.
- Week 4-6 — full strength training including chest exercises (no muscle pocket healing concern).
Subglandular patients can typically return to chest exercises and weight-lifting earlier than submuscular patients (Week 4-6 vs Week 8-10) because there is no submuscular pocket healing to protect.
Indications where subglandular fits
| Patient profile | Subglandular fit |
|---|
| Substantial overlying breast tissue (over 3 cm pinch) | Strong candidate |
| Athlete with developed pectoralis muscle | Animation prevention |
| Patient with low BMI but generous breast tissue | Acceptable with adequate pinch |
| Patient prioritising faster recovery | Acceptable with adequate tissue |
| Revision after submuscular complications | Possible if tissue allows |
| Thin patient (under 2 cm pinch) | NOT recommended — visible edges |
| Patient seeking maximum coverage | Submuscular or dual plane preferred |
Frequently asked questions
What is subglandular placement?
Subglandular (also called 'over the muscle' or 'pre-pectoral') placement positions the breast implant directly under the breast tissue but on top of the pectoralis major muscle. This is the simplest implant pocket — no muscle dissection required. The implant sits between the breast tissue and the chest wall muscle layer. Subglandular was the dominant placement in early breast augmentation but has been largely replaced by dual-plane and submuscular placement in modern practice for most patients.
What are the advantages of subglandular placement?
Three main advantages. (1) Faster recovery — no muscle dissection means less initial discomfort and faster return to activity. (2) No animation deformity — implants don't move when pectoralis muscle contracts (relevant for athletes, weight-lifters, fitness enthusiasts). (3) More immediate visible projection — implants sit higher and forward without muscle to mold them. Subglandular is the right choice for athletes concerned about animation, patients with substantial overlying breast tissue (more than 3 cm pinch), and patients prioritising faster recovery.
What are the disadvantages?
Three primary concerns. (1) More visible implant edges in thin patients — without muscle coverage, implant edges and rippling can be visible at the upper or lateral pole, particularly in patients with less than 2 cm of breast tissue pinch. (2) Higher historical capsular contracture rates — older data suggested approximately 2x rates vs submuscular (modern data shows the difference is smaller). (3) Slightly more difficult mammographic visualization — the implant overlaps with breast tissue rather than being separate from it. For thin patients, these concerns make subglandular less preferred.
Who is a good candidate for subglandular placement?
Specific anatomic and lifestyle profiles. (1) Patients with substantial overlying breast tissue (over 3 cm pinch test) — the breast tissue itself provides adequate coverage of implant edges. (2) Athletes who lift weights or have developed pectoralis muscles — submuscular placement creates animation deformity that can be problematic. (3) Patients prioritising faster recovery. (4) Patients with very low BMI but unusually generous breast tissue. (5) Some revision cases. Approximately 10-15% of primary augmentation in modern practice.
What is animation deformity?
When pectoralis muscle contracts (during exercise, certain movements, push-ups), implants placed under the muscle move with the muscle — pushing outward or upward visibly. The breasts can appear to deform during muscle contraction, returning to normal at rest. For most patients this is mild and acceptable; for athletes, weight-lifters, dancers, and fitness enthusiasts where pectoralis is heavily used, animation deformity can be significantly disruptive. Subglandular placement eliminates this — implants on top of the muscle don't move with muscle contraction.
How does subglandular compare to dual-plane?
Different priorities. Subglandular: faster recovery, no animation, more visible edges in thin patients, slightly higher capsular contracture historical risk. Dual-plane: better edge coverage, lower contracture rates, partial animation (less than full submuscular), longer recovery, more natural drape. For most patients with average overlying tissue, dual-plane is the modern default. For athletes specifically or patients with substantial breast tissue, subglandular may be preferred. Modern surgeons offer both based on patient-specific factors.
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