Saline vs Silicone Breast Implants NZ: Full Guide 2026
Complete comparison of saline vs silicone breast implants in New Zealand. Compare feel, safety, costs, longevity, and results to choose the right option. Updated October 2026.
Choosing between saline and silicone breast implants is one of the most important decisions in breast augmentation planning. This comprehensive guide compares both implant types across safety, feel, appearance, longevity, and cost to help you make an informed choice. Prices on this page are sourced ranges, with the sources listed under the table.
Quick Comparison: Saline vs Silicone Implants
| Factor | Saline Implants | Silicone Implants |
|---|---|---|
| Fill Material | Sterile saltwater (saline) | Cohesive silicone gel |
| Feel | Firmer, more uniform | Softer, more natural |
| Natural Appearance | Good (can ripple if thin tissue) | Excellent (most natural) |
| Cost (NZ 2026) | Ask clinics (no sourced range) | $12,000 – $18,000 (sourced) |
| Incision Size | Smaller (filled after insertion) | Larger (pre-filled) |
| Rupture Detection | Obvious (deflation visible) | Silent (needs MRI/ultrasound) |
| Safety if Ruptured | Body absorbs saline harmlessly | Gel contained, removal recommended |
| Lifespan | Not a lifetime device; no sourced figure | Not a lifetime device; 81.8%[source] of augmentation patients kept their original implants at 10 years (Natrelle, US study) |
| Rippling Risk | Higher (especially if thin skin) | Lower (gel more cohesive) |
| Weight | Slightly lighter | Slightly heavier |
What Are Saline Breast Implants?
Saline breast implants consist of a silicone outer shell filled with sterile saltwater (saline solution). They can be filled during surgery to the desired volume, allowing surgeons to make fine adjustments and use smaller incisions.
How Saline Implants Work:
- 1. Shell Insertion: Empty silicone shell inserted through small incision
- 2. Positioning: Implant positioned under breast tissue or chest muscle
- 3. Filling: Sterile saline solution added to desired volume (adjustable)
- 4. Sealing: Fill valve sealed to prevent leakage
- 5. Symmetry Check: Volume adjusted to ensure both breasts match
Types of Saline Implants:
- Smooth Saline: Smooth shell surface, softer feel, may shift position
- Textured Saline: Textured shell, stays in place, firmer feel
- Structured Saline: Internal baffles for more natural feel
Saline Implant Advantages:
- ✓ Price: Some clinics may price saline differently. Ask for both quotes, since our sources only publish a range for silicone
- ✓ Smaller Incisions: 1-1.5 inches vs 1.5-2 inches for silicone
- ✓ Adjustable Volume: Can fine-tune size during surgery
- ✓ Obvious Rupture: Immediate deflation makes rupture clear
- ✓ Safe if Ruptured: Body absorbs saline harmlessly
- ✓ Less Frequent Monitoring: Don't need MRI scans
- ✓ Symmetry Adjustments: Easy to match breast sizes precisely
- ✓ Long Track Record: Used safely for decades
Saline Implant Disadvantages:
- ✗ Less Natural Feel: Firmer than silicone or natural breast tissue
- ✗ Rippling Risk: Visible rippling, especially in thin women
- ✗ Less Natural Movement: May not move as naturally as silicone
- ✗ Higher Deflation Rate: More prone to leaks over time
- ✗ Water Sound: Some women hear sloshing with movement
- ✗ Not a Lifetime Device: may need replacing in future (ask your surgeon about expected lifespan)
What Are Silicone Breast Implants?
Silicone breast implants consist of a silicone outer shell pre-filled with cohesive silicone gel. Modern "gummy bear" implants use highly cohesive gel that maintains shape even if the shell breaks, providing the most natural look and feel.
How Silicone Implants Work:
- 1. Pre-Filled: Implants come pre-filled from manufacturer in specific sizes
- 2. Incision: Slightly larger incision needed (1.5-2 inches)
- 3. Insertion: Intact implant inserted through incision
- 4. Positioning: Placed under breast tissue or pectoral muscle
- 5. Final Adjustment: Position refined for optimal appearance
Types of Silicone Implants:
- Smooth Round Silicone: Classic option, softer, may rotate
- Textured Round Silicone: Stays in place, reduced rotation risk
- Anatomical "Teardrop": Shaped like natural breast, textured
- Gummy Bear (Highly Cohesive): Form-stable, maintains shape
Silicone Gel Cohesiveness Levels:
- Soft Cohesive: Most natural feel, mimics breast tissue closely
- Moderately Cohesive: Balance of natural feel and form stability
- Highly Cohesive (Gummy Bear): Holds shape firmly, minimal rippling
Silicone Implant Advantages:
- ✓ Most Natural Feel: Closely mimics natural breast tissue
- ✓ Superior Appearance: Looks more natural, especially when moving
- ✓ Less Rippling: Cohesive gel minimizes visible ripples
- ✓ Long-term data: in a US manufacturer-sponsored study, 81.8%[source] of primary augmentation patients still had their original silicone implants at 10 years
- ✓ Better for Thin Women: Less visible under minimal breast tissue
- ✓ Form Stability: Gummy bear implants maintain shape
- ✓ Silent Movement: No sloshing sounds
Silicone Implant Disadvantages:
- ✗ Ongoing Monitoring: Budget for the imaging your surgeon recommends over the life of the implant
- ✗ Larger Incisions: Pre-filled implants need bigger openings
- ✗ Silent Rupture: May not know if implant breaks (needs imaging)
- ✗ MRI Monitoring: Recommended MRI every 2-3 years to check integrity
- ✗ Removal if Ruptured: Gel should be removed if shell breaks
- ✗ Fixed Volume: Can't adjust size during surgery
- ✗ Slightly Heavier: Weighs more than equivalent saline implant
Cost Comparison: New Zealand 2026
Our sources publish one sourced range for breast augmentation, which assumes Medsafe-notified silicone implants. They don't publish a separate range for saline implants, so if you are considering saline, ask each clinic to quote both.
| Treatment | Price range (NZD) | Notes |
|---|---|---|
| Breast augmentation (silicone implants) | $12,000 – $18,000 | Includes Medsafe-notified implants + theatre + anaesthetist + 12-month follow-up. |
| Breast augmentation + lift (aug-mastopexy) | $18,000 – $26,000 | Combined procedure typical for post-pregnancy patients. |
| Breast implant removal | $8,000 – $14,000 | Removal only; with capsulectomy adds $2-5k. |
Sources for these ranges (last verified June 2026)
- NZAPS published surgeon fee survey 2025
- Auckland Plastic Surgery Group published 2026
- Wellington Plastic Surgery Institute published 2026
- RACS Fellowship guidance
These are national ranges from published sources, not quotes. Our sources don't report city-level prices. Ask clinics for an itemised written quote for your case.
A breast augmentation quote is usually made up of the surgeon's fee, the anaesthetist, the hospital or theatre fee and the implants themselves. Ask whether it also includes:
- The consultation and any pre-operative tests
- Post-operative garments and medicines
- Follow-up appointments, and for how long
- The surgeon's policy and fees if a revision or implant change is needed
Long-term costs: implants are not lifetime devices. Silicone implants may need imaging (ultrasound or MRI) to check for a silent rupture, and either type may need replacing in future. Ask your surgeon what monitoring they recommend and budget for it, along with the possibility of further surgery.
Safety & Rupture Comparison
Saline Implant Rupture:
Detection:
- • Immediate: Breast deflates within 24-48 hours
- • Obvious: Size change clearly visible
- • No Imaging Needed: Rupture self-evident
Health Impact:
- • Safe: Body absorbs saline harmlessly
- • No Urgency: Can wait to schedule removal/replacement
- • No Toxicity: Saline is sterile saltwater
Rupture Rate:
- • We have not found a sourced rupture rate for saline implants; ask your surgeon for the manufacturer's data
Silicone Implant Rupture:
Detection:
- • Silent: Often no symptoms (gel stays in place)
- • Needs Imaging: MRI or ultrasound required
- • Recommended Monitoring: MRI every 2-3 years
Health Impact:
- • Low Risk: Modern gel is biocompatible
- • Contained: Cohesive gel stays in shell or capsule
- • Removal Recommended: Should remove/replace when detected
Rupture Rate:
- • In a US manufacturer-sponsored study of Sientra cohesive silicone implants, 8.6%[source] of patients (augmentation, revision and reconstruction combined) had a rupture within 10 years
Feel & Appearance Comparison
| Characteristic | Saline | Silicone |
|---|---|---|
| Natural Feel (touch) | Firmer, uniform texture | Soft, mimics natural tissue |
| Visual Appearance | Good (may show ripples) | Excellent (very natural) |
| Movement/Bounce | Less natural (firmer) | Natural breast movement |
| Rippling Visibility | Higher risk | Lower risk |
| Best Placement | Under muscle (less rippling) | Over or under muscle |
| Thin Tissue Coverage | May show edges/ripples | Better camouflage |
| Temperature Feel | Adjusts to body temp quickly | Maintains warmth naturally |
Longevity & Maintenance Comparison
Saline Implants:
Expected Lifespan
- • Not a lifetime device
- • We have not found a sourced replacement rate for saline implants; ask your surgeon
Monitoring Required:
- • Annual physical exams
- • Self-checks for changes
- • No routine imaging needed
Replacement Reasons:
- • Deflation/rupture (most common)
- • Capsular contracture
- • Desire to change size
Silicone Implants:
Expected Lifespan
- • Not a lifetime device
- • In a US manufacturer-sponsored study (Natrelle round silicone), 81.8%[source] of primary augmentation patients still had their original implants at 10 years
- • In another (Sientra, all cohorts), 31.5%[source] of patients had a reoperation within 10 years
Monitoring Required:
- • MRI or ultrasound every 2-3 years
- • Annual physical exams
- • Self-checks for changes
Replacement Reasons:
- • Silent rupture (detected on MRI)
- • Capsular contracture
- • Desire to change size/type
Which Type Is Right For You?
Choose Saline Implants If You:
- ✓ Want a quote for saline as well as silicone
- ✓ Prefer smaller incisions and scars
- ✓ Want ability to adjust size during surgery
- ✓ Need to correct asymmetry precisely
- ✓ Don't want ongoing MRI monitoring
- ✓ Have good breast tissue coverage
- ✓ Are comfortable with firmer feel
- ✓ Want obvious rupture detection
Choose Silicone Implants If You:
- ✓ Want most natural look and feel
- ✓ Are comfortable with the sourced range for silicone augmentation ($12,000 – $18,000)
- ✓ Have thin breast tissue or little natural coverage
- ✓ Want minimal rippling risk
- ✓ Don't mind larger incisions
- ✓ Can commit to MRI monitoring
- ✓ Want implants that move most naturally
Special Considerations:
- Very Thin Women: Silicone recommended (less visible rippling)
- Previous Breast Surgery: Discuss with surgeon; may affect options
- Athletes/Active Lifestyle: Either type works; discuss with surgeon
- Breast Reconstruction: Often silicone for more natural result
- Future Breastfeeding: Both types safe; won't affect milk production
Recovery Comparison
Recovery is virtually identical for both saline and silicone implants:
- Day 1-3: Significant soreness, swelling, bruising; prescription pain medication
- Week 1: Swelling peaks; can return to light desk work
- Week 2: Most pain resolved; back to most normal activities
- Week 4-6: Can resume exercise (surgeon approval needed)
- Month 3: Implants "drop and fluff" into final position
- Month 6: Final results visible; all swelling resolved
Recovery Restrictions (Both Types):
- • No lifting >10 lbs for 2-4 weeks
- • Wear surgical bra for 4-6 weeks
- • Sleep elevated for 1-2 weeks
- • Avoid underwire bras for 6-8 weeks
- • No chest/arm workouts for 4-6 weeks
Frequently Asked Questions
What is the difference between saline and silicone breast implants?
Saline implants are filled with sterile saltwater and feel firmer, while silicone implants are filled with cohesive silicone gel that feels more like natural breast tissue. Silicone implants look and feel more natural. Our sources don't publish a separate price for saline, so ask clinics to quote both. If a saline implant ruptures, the body safely absorbs the saline; silicone ruptures may require imaging to detect.
How much do saline vs silicone implants cost in NZ?
Our sources put breast augmentation with silicone implants at $12,000 – $18,000 in New Zealand. They don't publish a separate range for saline implants, so ask clinics to quote both. A quote usually covers the surgeon, anaesthetist, hospital fee and implants; ask for it itemised.
Which breast implant type lasts longer?
Neither type is a lifetime device. For silicone, in a US manufacturer-sponsored study (Natrelle round silicone Core Study), 81.8% of primary augmentation patients still had their original implants 10 years after surgery. We have not found a comparable sourced figure for saline implants, so we don't say which type lasts longer. Either type may need replacing because of capsular contracture, rupture, or a wish to change size.
Are silicone implants safe?
Modern silicone breast implants used in New Zealand are Medsafe-notified medical devices. Extensive research has found no causal link between silicone implants and autoimmune diseases, breast cancer, or other systemic illnesses. Modern cohesive gel silicone stays contained even if the shell breaks. The main safety consideration is monitoring for silent rupture with MRI every 2-3 years.
Do saline or silicone implants feel more natural?
Silicone implants feel significantly more natural than saline. The cohesive gel closely mimics the texture and movement of natural breast tissue, while saline feels firmer and more uniform. This difference is most noticeable in thin women with minimal natural breast tissue. Partners and the patient themselves can usually feel the difference between saline and silicone.
Can you switch from saline to silicone implants?
Yes, saline implants can be replaced with silicone implants during an implant exchange procedure. This is commonly done when women want a more natural feel or when saline implants need replacement. The exchange is priced individually, so ask for a written quote. It involves removing old implants and inserting new silicone ones, often through existing scars.
Where these figures come from
Each figure below is copied from the source named, which we last checked on the date shown. Outcomes for any one patient or clinic can differ. Ask your surgeon for their own results.
- Primary augmentation patients still with their original implants at 10 years: 81.8% (% of subjects). Natrelle round Core Study augmentation subjects; 10 years. International (US).
Spear SL et al. Plast Reconstr Surg 2014, checked 2026-11-14. - Severe capsular contracture, reoperation and rupture within 10 years (Sientra Core Study): 8.6–31.5% (% of patients (rupture 8.6; Baker III/IV contracture 13.5; reoperation 31.5)). 1,788 patients across augmentation, revision and reconstruction cohorts (1,116 primary augmentation); 10 years. International (US).
Ten-year Core Study Data for Sientra's FDA-Approved Round and Shaped Breast Implants with Cohesive Silicone Gel. Plast Reconstr Surg 2018;141(4S):7S-19S, checked 2026-11-14.
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