Silicone vs Saline Implants: What Australian Women Need to Know

If you're considering breast augmentation in Australia, one of the earliest decisions you'll face is implant type. Silicone or saline? It sounds straightforward, but the differences affect everything from how your results look and feel to how a rupture gets detected, what monitoring you'll need, and how much you'll pay.

This guide breaks it down independently. Pirk isn't a clinic — we're a concierge service that's assessed over 400 AHPRA-registered surgeons across Australia. We don't sell implants or perform procedures. What we do is give you the information you need to walk into your consultation feeling prepared.

[IMAGE: Two women chatting over coffee in a bright Australian cafe — warm, relaxed, lifestyle feel. No clinical imagery or implant products visible]

What's the Difference Between Silicone and Saline Implants?

Both types use a silicone outer shell. The difference is what's inside.

Saline implants are filled with sterile saltwater. They're inserted empty and filled to the desired volume during surgery. If they rupture, the saline is harmlessly absorbed by your body — and you'll know quickly, because the implant visibly deflates.

Silicone gel implants are pre-filled with a cohesive silicone gel that mimics the feel of natural breast tissue. They come in a fixed size, so your surgeon selects the right volume before the procedure. If they rupture, the gel tends to stay within the shell or surrounding tissue — which means ruptures can be harder to detect without imaging.

Most Australian surgeons recommend silicone for the majority of patients, but saline still has a role depending on your anatomy, preferences, and priorities. Neither option is universally "better" — it depends on what matters most to you.

What About Cohesive Gel ("Gummy Bear") Implants?

You might've heard the term "gummy bear implants." These are a type of silicone implant filled with a highly cohesive gel that holds its shape even if the shell is cut. Think of it like a gummy bear lolly — firm, but with some give.

Cohesive gel implants are form-stable, meaning they maintain their shape rather than shifting with gravity the way traditional silicone gel does. They're often anatomical (teardrop-shaped) rather than round, which some women prefer for a more natural slope.

The trade-off? They tend to feel slightly firmer than standard silicone gel implants. They also cost more and require a slightly larger incision because they're pre-formed. Your surgeon can advise whether the trade-off makes sense for your body type and goals.

How Does the TGA Regulate Breast Implants in Australia?

Australia's Therapeutic Goods Administration (TGA) maintains one of the most rigorous regulatory frameworks for breast implants in the world. Every implant used in Australia must be listed on the Australian Register of Therapeutic Goods (ARTG), and the TGA actively monitors safety data from both local and international sources.

A recent example of this oversight: in October 2025, the TGA cancelled the registration of Motiva implants with transponder microchips (the Q Inside Safety Technology). The decision was made after the TGA determined there wasn't sufficient evidence to support the long-term safety of embedded transponder devices in breast implants. The implants themselves — without the transponder — remain available, but the microchip-enabled version was removed from the Australian market.

This is worth noting because it shows the TGA doesn't just approve devices and walk away. It actively reassesses products when new safety questions arise. If you're comparing implant brands, ask your surgeon which products are currently ARTG-listed and what the warranty terms are.

For the latest information, the TGA's breast implant hub is a reliable, independent source.

How Do Silicone and Saline Compare on Feel and Appearance?

This is often the deciding factor for women choosing between the two.

Feel. Silicone gel implants are widely considered to feel more like natural breast tissue. The gel has a soft, slightly dense consistency that closely mimics the weight and movement of natural breast tissue. Saline implants can feel firmer and may ripple more noticeably, particularly in women with less natural breast tissue to cover the implant.

Appearance. Silicone tends to produce a more natural-looking result, especially for women with a slimmer build or less existing breast tissue. Saline implants are more likely to show visible rippling along the edges, particularly in the upper and inner breast. If you have a good amount of natural tissue, the difference in appearance may be less pronounced.

Placement matters too. Implants placed under the pectoral muscle (submuscular) generally look and feel more natural with both types, because the muscle provides an additional layer of coverage. Your surgeon will factor your tissue thickness into their recommendation.

[IMAGE: Side-by-side comparison infographic showing silicone vs saline implant cross-sections — simple, clean illustration using Pirk brand colours (coral #F2705C, burgundy #4D0121). No real photos of implants or bodies]

Silicone vs Saline: Head-to-Head Comparison

| Feature | Silicone Gel | Saline | |---|---|---| | Feel | Soft, natural — similar to breast tissue | Firmer, can feel less natural | | Appearance | Less visible rippling | More prone to rippling, especially with thin tissue | | Rupture detection | "Silent rupture" — may need MRI or ultrasound | Obvious — implant deflates visibly | | Monitoring | Recommended imaging every 2-3 years | No routine imaging required | | Longevity | 10-20 years (varies by brand and individual) | 10-15 years (varies) | | Incision size | Larger (pre-filled) | Smaller (filled during surgery) | | Volume adjustability | Fixed — chosen before surgery | Adjustable during surgery | | Cost (implant only) | Approximately $1,500 - $3,000 per pair | Approximately $1,000 - $1,800 per pair | | Safety profile | Extensively studied, TGA-approved brands available | Extensively studied, TGA-approved brands available |

These figures are indicative only. Your actual costs will vary depending on your surgeon, location, and chosen brand. For a full cost breakdown, see: How Much Does Breast Augmentation Cost in Australia?

What Happens If an Implant Ruptures?

This is one of the most important practical differences between the two types.

Saline rupture is straightforward. The implant deflates, sometimes over hours, sometimes over days. You'll notice the size change. The saltwater is safely absorbed by your body, and you'll need surgery to replace the implant, but there's no ambiguity about whether a rupture has occurred.

Silicone rupture is more nuanced. Because the cohesive gel holds together, a ruptured silicone implant may not change shape or size noticeably. This is often called a "silent rupture." You might not have any symptoms at all. That's why the TGA and most surgeons recommend regular imaging — typically an ultrasound every two to three years, with MRI if something looks unclear.

A silicone rupture isn't a medical emergency. The gel is contained by the scar tissue capsule that naturally forms around every implant. But it does need to be addressed — your surgeon will recommend removal or replacement once a rupture is confirmed.

If rupture detection is a priority for you, that's a genuine point in saline's favour. It's worth discussing with your surgeon during your consultation.

How Long Do Each Type of Implant Last?

Neither silicone nor saline implants are lifetime devices. This is true regardless of brand, type, or price point.

Most manufacturers and surgeons advise planning for implant replacement or removal somewhere between 10 and 20 years. Some implants last longer without complications. Others may need attention sooner. There's no guaranteed expiry date — it varies by individual.

What affects longevity? Your body's response to the implant, the quality of the surgical technique, whether you follow your surgeon's monitoring schedule, and the implant brand's track record all play a role.

Implant warranties also vary significantly. Some brands offer lifetime replacement warranties for rupture, while others cover a set period. Ask your surgeon to walk you through the specific warranty terms for the implant they recommend.

For a detailed look at what recovery and ongoing care involves, read: Breast Augmentation Recovery: Week-by-Week Timeline

How Much More Do Silicone Implants Cost?

Silicone implants generally cost more than saline — but the difference is often smaller than people expect.

The implant cost alone (not including surgeon fees, anaesthesia, or hospital) typically looks like this:

• Silicone gel — approximately $1,500 to $3,000 per pair
• Cohesive gel ("gummy bear") — approximately $2,000 to $3,500 per pair
• Saline — approximately $1,000 to $1,800 per pair

Within the context of a total procedure cost of $8,000 to $20,000, the implant type adds a few hundred to a couple of thousand dollars to the final number. It's a factor, but it shouldn't be the primary driver of your decision.

One thing to factor in: silicone implants require ongoing imaging for rupture monitoring, which adds to long-term costs. An ultrasound every two to three years might cost $150 to $400 each time. Over the life of the implant, that adds up.

What Should I Ask My Surgeon About Implant Type?

Your consultation is where this decision gets personal. Here are questions worth asking:

1. Based on my body type and goals, which implant type do you recommend and why?
2. What brand of implant do you use, and is it currently listed on the ARTG?
3. What's the rupture rate for the implant you recommend?
4. What monitoring schedule do you suggest after surgery?
5. What does the implant warranty cover, and for how long?
6. If I choose silicone, how often should I have imaging done and what will that cost?

A good surgeon won't push one type over the other without explaining their reasoning. If you feel like you're being steered toward a decision without adequate explanation, that's worth noting. For more on what to look for in a surgeon, read: How Do I Choose a Qualified Breast Augmentation Surgeon in Australia?

If you'd like independent guidance on finding the right surgeon for your situation, take Pirk's free matching quiz. We'll match you with AHPRA-registered surgeons based on your goals, location, and preferences — no sales pitch, just honest recommendations.

Frequently Asked Questions

Are silicone implants safe?

Yes. Silicone gel breast implants have been extensively studied over several decades. They're approved by the TGA in Australia and by regulatory bodies worldwide. Earlier concerns about a possible link between silicone implants and autoimmune conditions have not been supported by large-scale research. As with any medical device, individual experiences vary — your surgeon can discuss the current safety data with you.

Can I switch from saline to silicone (or vice versa) during replacement surgery?

Yes. If you're having implant replacement surgery, you can switch types at that time. Your surgeon will assess whether your existing pocket and tissue can accommodate a different implant type and advise accordingly.

Do saline implants look fake?

Not necessarily. In women with adequate natural breast tissue, saline implants can produce a very natural result. The risk of visible rippling is higher with saline, particularly in thinner patients or with above-the-muscle placement. Submuscular placement and appropriate sizing reduce this risk significantly.

How do I know if my silicone implant has ruptured?

You might not — that's why regular imaging is recommended. Some women experience changes in breast shape, firmness, or comfort. Others have no symptoms at all. An ultrasound is typically the first-line screening tool, with MRI used for further assessment if needed.

Which implant type is more popular in Australia?

Silicone gel implants are used in the significant majority of breast augmentation procedures in Australia. This is partly due to the more natural feel and appearance, and partly because Australian surgeons have extensive experience with the current generation of silicone gel products.

Disclaimer: Pirk is not a medical provider. We're here to support your decisions and help connect you with qualified, registered health practitioners. All procedures are performed by qualified surgeons or registered health practitioners, and any medical advice should always come directly from your treating provider. We guide you through the journey, but all medical decisions are made between you and your surgeon.