What this review asks
Breast implant pocket placement evidence has developed alongside changes in implant design, surgical dissection and patient expectations. The earliest modern augmentations generally used a retromammary or subglandular pocket, placing the implant above the pectoralis major muscle. In 1968, Dempsey and Latham reported subpectoral augmentation, beginning a shift toward muscle coverage for selected patients. Decades later, subfascial placement was proposed as another prepectoral option, intended to add a layer of fascia without deliberately moving the implant behind the muscle.
This history is not a story in which one pocket replaced all others. Subglandular, subpectoral and subfascial planes each change the relationship between an implant, the breast tissue, the skin envelope and the pectoral muscle. The intended benefits and possible complications are different, but the evidence is also shaped by implant generation, surface, incision, pocket dissection, patient anatomy and follow-up. The practical conclusion is therefore measured: no single plane is universally best for every primary cosmetic augmentation.
What “pocket plane” means
A pocket is the surgically created space that receives the implant. “Subglandular” usually means between the breast tissue and the pectoralis major fascia or muscle, often described more broadly as a prepectoral or retromammary position. “Subpectoral” or “submuscular” places at least part of the implant behind the pectoralis major. In modern augmentation this is often a partial retropectoral or dual-plane arrangement rather than complete muscle coverage. A subfascial pocket is intended to place the implant beneath the pectoral fascia and immediately superficial to the muscle, although the thickness, continuity and surgical meaning of that fascia are not uniform.
Those definitions matter because pocket names are not interchangeable. A dual-plane operation combines a retromammary lower relationship with upper or medial muscle coverage, and it has its own evidence base. A breast reconstruction after mastectomy may use a “prepectoral” or “subpectoral” implant in a skin envelope that differs fundamentally from a patient seeking primary cosmetic augmentation. This article focuses on primary aesthetic augmentation and uses “subpectoral” for muscle-involving placement while noting where studies include partial or dual-plane techniques.
The early era: why subglandular placement was the starting point
Before surgeons had reliable implant dimensions, cohesive fillers or modern pocket-control methods, the breast was commonly approached through a subglandular, prepectoral plane. The historical review by Perry and Frame describes early implant placement as relatively traumatic and often carried out through a small incision with blunt, blind dissection. The resulting pocket could be only slightly larger than the implant. Bleeding, tissue trauma, a tight healing cavity and early implant designs with more gel bleed all contributed to a difficult environment in which capsular contracture was common.
Subglandular placement nevertheless had practical logic. It avoided cutting or stretching the pectoralis major, allowed the implant to sit directly beneath the breast mound, and could provide a more immediate lower-pole and breast-shape effect in a patient with enough tissue coverage. It also avoided a visible change caused by contraction of the chest muscle. The historical record should not be read as proof that the plane itself caused every early failure: the device, surface, sterility, hemostasis, pocket size and patient selection were changing at the same time.
In a thin patient, however, placing the implant closer to the skin can make its edge or folds more visible and palpable. The risk is influenced by implant fill and shell, dimensions, tissue thickness and later changes in the breast, not by the pocket name alone. A wide or oversized implant can also stretch the envelope and contribute to malposition in any plane. The subglandular option is therefore best understood as a tissue-dependent choice, not a default that is safe or unsafe in isolation.
The subpectoral shift: coverage and the cost of muscle involvement
Dempsey and Latham’s 1968 report introduced subpectoral prosthesis implantation into the modern augmentation discussion. The rationale was to use the pectoralis major as additional soft-tissue cover over the upper implant. In the following decades, subpectoral techniques became widely adopted, especially as saline implants and other devices made upper-pole edge concealment an important aesthetic concern. Perry and Frame describe a further shift in the 1990s, when surgeons sought wider and less traumatic pockets and used muscle coverage to camouflage implant contour.
The intended advantages of subpectoral placement are easy to understand. Muscle can soften the transition at the upper pole, reduce the visibility of an implant edge in a thinner envelope and, in older comparative literature, be associated with less severe capsular contracture than a subglandular position. The muscle may also keep the implant away from some breast-glandular tissue and create a different dissection environment. These are potential advantages, not guarantees, and the magnitude of each depends on the patient and the exact technique.
Muscle coverage creates its own trade-offs. Cutting or releasing the lower pectoral origin can cause more early tightness or pain than a straightforward subglandular dissection. When the muscle contracts, it can flatten, pull or displace the implant. This dynamic change is called animation deformity when it produces an unwanted visible distortion. A subpectoral pocket may also leave an implant initially high, restrict lower-pole expansion or interact poorly with a loose or ptotic breast. The goal is not simply to maximise muscle coverage; it is to place coverage where it helps without creating a new mechanical problem.
Dual-plane surgery as a historical bridge
The limitations of a single plane helped drive dual-plane thinking. Tebbetts’ dual-plane work described a way to use partial retropectoral coverage in the upper breast while allowing the lower implant to relate more directly to the breast tissue and lower pole. The 2001 and 2006 technique papers describe a large clinical series and frame dual-plane surgery as an attempt to adjust implant–soft-tissue relationships for different breast types, including glandular ptosis and a constricted lower pole.
Dual-plane surgery is relevant to the evolution of pocket placement because it makes the trade-off explicit. A surgeon may want muscle coverage at the upper pole but more freedom for the lower breast, or may need to manage the relationship between an implant and a breast that already descends over the fold. The technique is not a simple fourth answer that automatically combines every benefit. Muscle activity, lower-pole skin quality, nipple position, fold position and the amount of release all remain clinically important. A planned Academic #18 review covers dual-plane origins in greater detail.
Subfascial placement: the attempt to keep the muscle quiet
Graf and colleagues reported a subfascial breast implant technique in 2003 after treating 263 patients between 1998 and 2001. Their proposed rationale was to avoid the deformation associated with a retromuscular position while adding tissue between the implant and skin compared with a retroglandular pocket. The concept became especially attractive to surgeons looking for a middle position: preserve the muscle and its movement, but create a layer that might reduce edge prominence.
The terminology deserves caution. The pectoral fascia is a thin and variable collagenous layer, not a uniform second muscle. A 2024 anatomical commentary argued that what is called “subfascial” may ultimately be better grouped under the broader term “prepectoral,” because the true plane and amount of fascia retained may vary between operations. This debate is not semantic trivia. If studies label different dissection planes with the same word, their complication rates are harder to pool and comparisons become less reliable.
Subfascial surgery is therefore not a promise of muscle-level coverage for a very thin patient. It may provide extra support or a slightly thicker interface in selected anatomy, but the native breast and soft tissues still determine how well the implant is concealed. The proposed benefits include less muscle-related distortion, potentially less early muscle pain and lower edge prominence than a purely subglandular pocket. The limitations include technical variability, a thin fascial layer, possible rippling or palpability and a lack of high-quality long-term comparative evidence.
What comparative evidence says about complications
Older subglandular-versus-subpectoral comparisons suggest an association between muscle coverage and lower capsular contracture, but they come from particular devices and surgical eras. In a 1987 series of 100 patients, Puckett and colleagues reported overall contracture in 58% of subglandular patients and 22% of subpectoral patients, with more severe contracture also lower in the subpectoral group. These striking historical figures describe that surgeon’s consecutive series and its implants, technique and follow-up; they should not be used as a current universal rate.
A large clinical-trial analysis published in 2013 used multivariable time-to-event models and found that subpectoral placement was associated with reduced risk of Baker grade III–IV contracture compared with subglandular placement in primary augmentation. The same study found device surface, filler, shape and incision were also important predictors. That combination is a reminder that a plane effect can be confounded or modified by other variables. A comparison made across different surfaces or implant generations is not a clean test of pocket anatomy.
Strasser’s decade-spanning, single-surgeon comparison of 100 subglandular and 100 subpectoral patients found visible rippling and palpability in the subglandular group, while subpectoral patients experienced muscle-contraction deformity, malposition, asymmetry and contour problems. The paper reported substantial upward migration at seven-year follow-up in its subpectoral cohort. Because early displacement cases were excluded and all patients first had to have a satisfactory result, this is not a population-wide prediction. It is useful as a description of how one plane can exchange one set of problems for another.
For subfascial versus subglandular placement, Yuan and colleagues’ 2024 systematic review and meta-analysis included ten studies: three randomised trials and seven comparative cohorts. The pooled analysis favoured subfascial placement for hematoma, rippling and capsular contracture, but the authors judged all included studies to have a high risk of bias and called for more rigorous randomised evidence. The result is clinically interesting, not definitive. Differences in implant surface, surgeon technique, follow-up and patient selection may explain some of the apparent advantage.
Earlier, Gould and colleagues reviewed 22 reports involving 3,743 subfascial patients and found 38 reported contractures, or about 1.01%, with infection reported at about 0.1%. Animation deformity was not reported in those studies. Those numbers cannot be read as a direct head-to-head comparison because most reports were case series, outcomes were not measured in the same way and a complication that is not reported is not necessarily absent. A long, carefully followed comparative cohort is more informative than a short series with incomplete surveillance.
Newer evidence also shows why the story is still developing. A 2026 systematic review that stratified subfascial and subglandular contracture findings by implant surface reported no statistically significant difference for contemporary smooth-implant cohorts, while earlier apparent differences were influenced by textured-implant studies. This does not erase the findings of the 2024 review; it shows why surface and plane need to be analysed together. Evidence about textured devices also belongs in the current regulator and device-labeling context, especially after changes in the use of some textured surfaces.
How patient-specific trade-offs guide the choice
Soft-tissue thickness and quality. Thin upper-pole coverage makes implant visibility, palpability and rippling more consequential. Muscle or partial muscle coverage may help in some patients, while a subfascial or subglandular plan may be reasonable when the breast envelope already provides enough cover. A pinch measurement informs the assessment but does not map every tissue layer or guarantee a stable result.
Breast base, chest wall and implant dimensions. Pocket choice cannot compensate for an implant that is too wide, too projecting or too heavy for the envelope. Chest-wall shape, breast spacing, fold position and baseline asymmetry influence both the pocket and device selection. A patient’s preferred volume is translated into dimensions that the tissue can reasonably accommodate, not into a plane chosen to make an unsuitable implant fit.
Muscle activity and priorities. Someone who performs frequent chest training may care deeply about dynamic distortion; someone with very little upper-pole tissue may prioritise concealment. Neither concern automatically decides the operation. The consultation should ask how the patient wants the breast to look at rest and during movement, and whether the potential benefit of muscle cover justifies the possibility of animation or tightness.
Ptosis, skin laxity and lower-pole shape. An implant can add volume but cannot reliably reposition a low nipple or repair every loose skin envelope. A subpectoral approach may create a high implant under a breast that continues to fall, while a prepectoral relationship may better follow the existing mound in a selected patient but expose the device if coverage is poor. A lift, a dual-plane strategy, staged surgery or a smaller implant may be part of an honest discussion.
Future examination and revision. Every plane can develop contracture, malposition, rippling, infection, rupture or a need for additional surgery. The choice also affects revision options. Conversion from a subpectoral plane to a subglandular or subfascial plane can relieve muscle-related movement in selected revision patients, but it requires adequate coverage and has its own risks. The decision should include the patient’s willingness to accept future monitoring and possible reoperation.
What the evidence does not prove
The literature does not prove that subpectoral placement is always safer, that subfascial placement is a universally superior compromise or that subglandular placement is outdated. The studies compare different eras, devices, surfaces, incisions, surgeons and definitions of complications. Randomisation is uncommon, and a surgeon may deliberately assign a thinner patient to one plane and a patient with more tissue to another. That selection makes raw percentages difficult to interpret.
Follow-up is another limitation. Contracture, malposition, rippling and dynamic deformity may emerge at different times. A study that checks patients at three months cannot answer the same question as one with seven or ten years of follow-up. Patient satisfaction is valuable but subjective, and a surgeon’s aesthetic grading is not the same as a validated patient-reported outcome. Reconstruction and revision studies add useful technical insight but should not be used to generate a complication rate for primary cosmetic augmentation.
For a current consultation, the most defensible process is to examine the patient, measure the breast base and soft-tissue envelope, identify the exact implant dimensions and surface, and explain the likely benefits and limitations of the proposed pocket. The clinician should also discuss the current device labeling and long-term follow-up expectations. A pocket name is a starting point for that conversation, not its conclusion.
Questions to take to a consultation
- Which plane is proposed, and what specific anatomical finding makes it suitable for me?
- How much soft-tissue coverage do I have over the upper and lower implant, and how reliable is that assessment?
- How do my chest width, breast base, skin quality and desired implant dimensions interact?
- If the pectoral muscle contracts, what movement or distortion could occur with this plan?
- What are the likely trade-offs for rippling, palpability, capsular contracture, malposition and later revision?
- Is a dual-plane, lift, smaller implant or staged plan more appropriate if the requested size exceeds my tissue limits?
- Which current patient information and device records will I receive for the exact implant?
For the broader procedure context, see the breast augmentation operation guide. For plain-language explanations of muscle-related movement and complications, see animation deformity after breast augmentation, capsular contracture after breast augmentation, breast implant rippling and wrinkling and breast implant malposition. The planned dual-plane augmentation evidence review and implant dimensions, base width and cc review provide adjacent research context. A package page may be relevant only after clinical planning: breast augmentation all-inclusive package.
Conclusion
The evolution of implant pocket placement is a history of balancing coverage, movement, tissue quality and control of the breast shape. Subglandular placement avoids muscle involvement but can expose the implant when coverage is limited. Subpectoral placement can improve upper-pole camouflage and has historically been associated with less severe contracture, but muscle pain, animation and displacement are real trade-offs. Subfascial placement aims to sit between those choices, yet its anatomy and evidence remain less standardised than its name suggests.
The best reading of current breast implant pocket placement evidence is not a universal ranking. It is a reason to match the plane to measured anatomy, implant dimensions, muscle activity, skin and breast shape, and the patient’s priorities. Clear consent includes what the chosen plane may help, what it cannot prevent, how long the evidence has followed patients and what future revision or monitoring could involve.