One of the first decisions patients face when considering breast augmentation is the choice between saline and silicone implants. Both are safe, both are widely used, and both can produce beautiful results—but they behave differently in the body, and the right choice depends on your anatomy, your goals, and your priorities. Here is how I walk patients through that decision in my practice.
The difference between saline and silicone breast implants
Both implant types have an outer shell made of silicone—the difference lies in what’s inside.
Saline implants are filled with sterile saltwater that go in empty and are only filled once in position, resulting in a slightly smaller insertion incision. Because the fill volume is adjusted after placement, there is also more flexibility in terms of increasing the implant size. Saline implants are also generally considered the more financially accessible option.
Silicone implants come pre-filled with a cohesive silicone gel—a material engineered to closely mimic the consistency of natural breast tissue. They require a slightly larger incision to insert but offer a different aesthetic result, which I’ll cover in the sections below.
Whether saline or silicone, both have been approved by Health Canada and the FDA, and both have decades of safety data behind them. In my practice, silicone implants represent the largest majority of augmentations— reflecting the broader trend across North America—but for the right patient, saline remains a legitimate option. During your consultation, you’ll be able to hold and feel samples of both before making any decision.
I also address this comparison directly in the video below—including my take on which tends to perform better and why.
The aesthetics of saline vs. silicone
For patients with a moderate amount of natural breast tissue, both implant types can look very similar once in place—the tissue overlying the implant softens the appearance of both. The differences become more apparent in some specific situations.
Rippling is the most common critique when it comes to saline implants. Because saline is a fluid, it can create visible or palpable rippling along the sides or lower pole of the breast, particularly in patients with thinner skin or limited breast tissue. Silicone, especially highly cohesive (gummy bear) gel, is far less prone to this effect.
Upper pole fullness also differs subtly between the two: silicone tends to produce a softer, more graduated upper pole, while saline can create a slightly rounder, more projected look at the top of the breast. Neither is universally better—it depends on the patient’s anatomy and the result they are looking for.
It is worth noting that implant type is a separate decision from implant shape. Both saline and silicone are available in round and teardrop (anatomical) profiles, and in a range of projection levels. You can see the range of results in our breast augmentation before and after gallery.
Do silicone implants feel more natural than saline?
This is the question I hear most often—and my honest answer is: yes, silicone feels more natural, and for most patients the difference is meaningful.
Silicone gel is engineered to closely mimic the consistency of natural, fatty breast tissue. It compresses and rebounds the way tissue does—which is why, once in place, it is often indistinguishable from the breast tissue surrounding it. Saline implants, being fluid-filled, tend to feel firmer and less integrated. The difference is most noticeable in patients with limited natural breast tissue, where there is less overlying tissue to soften the implant. For those patients, silicone is clearly the stronger recommendation.
Implant placement is also a determining factor. Submuscular placement— beneath the pectoral muscle—adds a layer of soft tissue coverage regardless of implant type, which reduces perceptibility and improves the overall feel. For patients with meaningful natural breast tissue, both saline and silicone can feel similar in everyday life. But when I ask patients who have held both implant samples to describe the difference, silicone consistently reads as softer and more natural—and that impression holds once in the body.
It is also worth noting that silicone implants vary in gel firmness. Standard cohesive silicone is soft and pliable; highly cohesive silicone, commonly referred to as “gummy bear” gel, is firmer and holds its shape more rigidly. While both are silicone, the feel and behaviour differ. Gel firmness is a separate consideration from implant shape, (both round and teardrop implants are available in either) and is something we discuss during consultation, factoring in your anatomy and your desired result.
Saline vs. silicone: which is safer?
I can attest with complete frankness that both options are considered safe. The narrative that one is categorically safer than the other is not supported by the clinical evidence—but when it comes specifically to rupture risk, silicone has a meaningful advantage over saline, and that is worth understanding.
Saline: If a saline implant ruptures or deflates, the saltwater is absorbed harmlessly by the body. The change in breast size and shape is immediately visible, which makes detection obvious. There is no health risk from the material itself—but the implant does need to be replaced—and saline implants do carry an increased risk of rupture after roughly ten years. Most patients with saline implants should plan on replacement within ten-to-fifteen years.
Silicone: Modern silicone implants use a highly cohesive gel that does not migrate even if the shell is compromised. More importantly, the durability of current-generation silicone implants is in a different category from their predecessors—and from saline. In clinical terms, silicone is essentially indestructible: it can remain in place for a lifetime without the expectation of replacement. Concerns about silicone safety were more relevant with the older liquid-gel implants; multiple large-scale studies found no link between modern silicone implants and systemic disease.
One topic worth addressing directly: BIA-ALCL (breast implant–associated anaplastic large cell lymphoma). This is a rare lymphoma associated specifically with textured implants—not smooth implants—which are the standard in my practice. It is not a breast cancer, and the risk with smooth implants is considered negligible. Patients should nonetheless be aware the topic exists and feel free to raise it at the time of consultation.
Breast Implant Illness (BII): Some patients report systemic symptoms they attribute to their implants. Research is ongoing, and it is a subject I take seriously in consultation. If you have concerns in this area, it belongs in our conversation before surgery.
Both implant types require routine follow-up, not because of safety concerns, but because implants are long-term medical devices that benefit from monitoring.
What happens if a saline or silicone implant ruptures?
Saline rupture is obvious. The implant deflates, the saltwater is absorbed by the body without harm, and the change in the breast is immediately noticeable. A surgical revision is needed to replace the implant, but there is no health consequence from the material itself. The more significant consideration with saline is longevity: the risk of rupture increases considerably after ten years, which means most patients with saline implants should anticipate replacement within ten-to-fifteen years. It is not a question of whether the implant will eventually need replacing, but when?
Silicone is a different situation entirely. The cohesive gel used in modern silicone implants holds its shape even if the shell is compromised—what is referred to as a “silent rupture.” Periodic imaging (typically MRI or ultrasound, beginning around five or six years after surgery) is recommended to check shell integrity. But the durability of current-generation silicone is in a different category from saline: these implants are engineered to last a lifetime, and for many patients, they do. There is no built-in ten-to-fifteen-year replacement clock the way there is with saline.
The practical distinction for patients: saline implants are more likely to require replacement over time, and will be obvious when they do; silicone implants require periodic monitoring but are not expected to fail and may never need replacing at all. For patients thinking long-term, this difference in durability is one of the most compelling arguments for silicone.
Silicone vs. saline: which should you choose?
There is no single right answer—and I say that genuinely, not as a deflection to avoid giving an outright answer. The fact is that the best implant for you depends on your anatomy, the amount of natural breast tissue you have, your aesthetic goals, and your personal priorities.
Silicone is typically the clear choice when you have limited natural breast tissue, prioritize a natural look and feel, or you want to minimize the risk of visible rippling. It is the implant I recommend most often, and the one most patients in my practice choose.
Saline may be worth considering when you will feel more at ease knowing when a rupture has occurred, are comfortable with a slightly firmer feel, or prefer a smaller incision. Younger patients should be aware that saline implants are only approved for patients 18 and older, while silicone carries an FDA guideline of 22 and older—something we discuss if relevant.
It is important to remember that the decision of saline vs. silicone is never made unilaterally. I look at your tissue thickness, skin quality, frame, and the specific result you are hoping to achieve, and we work through it together, implant samples in hand, at your breast augmentation consultation.
