The answer depends on what type of implant you’re asking about. For dental implants, most practitioners won’t place them until jaw growth is complete, which typically means age 18 at the earliest but often later. For breast implants, the FDA sets the minimum at 18 for saline-filled and 22 for silicone gel-filled implants. Both types of implants have age requirements rooted in biology, not just legal cutoffs.
Dental Implants: Why Jaw Growth Matters
Dental implants are titanium posts surgically placed into the jawbone, where they fuse with the bone and act as permanent anchors for replacement teeth. The reason age matters so much is that implants behave like fused, immovable objects in the jaw. Unlike natural teeth, which shift and adjust as the bones around them grow, an implant stays exactly where it was placed. In a jaw that’s still developing, this creates a serious mismatch.
As the surrounding bone and teeth continue to move with growth, the implant falls behind. The most common complication is called infra-occlusion, where the implant-supported tooth sits lower than the teeth around it because the rest of the jaw has grown upward or outward. In the lower jaw, implants can also rotate out of alignment. These aren’t cosmetic inconveniences. They can require additional surgery to correct and may compromise the long-term health of surrounding teeth and bone.
The Minimum Age Isn’t as Simple as 18
While 18 is often cited as the threshold, jaw growth doesn’t stop cleanly at any single birthday. Research presented through the European Association for Osseointegration highlights that growth continues, at a slower rate, into the late 20s and beyond. Women in particular may experience continued facial growth into their 30s.
The growth timeline differs between sexes. In girls, the peak growth spurt for facial size and jaw length happens around age 11.5. In boys, those peaks occur later, around age 14.3 to 14.4. But peak growth and completed growth are two different things. After the growth spurt, the jaw continues to change in subtle ways for years. This is why some oral surgeons prefer to wait until a patient is in their early to mid-20s, especially for implants in the front of the mouth where even small shifts in position become visible.
To confirm that growth has slowed enough, practitioners sometimes compare X-rays taken 6 to 12 months apart. If the jaw dimensions haven’t changed between the two images, it’s a reasonable sign that the bone is stable enough for an implant.
What Happens When Young People Lose Teeth
Dental trauma peaks in childhood and adolescence, which creates a frustrating gap: the patients who most often lose front teeth to injuries are the same ones who can’t yet receive implants. For these younger patients, the standard approach is interim treatment. This usually means a removable prosthetic or a bonded bridge that preserves the space and keeps the surrounding bone healthy until the jaw is mature enough for a permanent implant.
Preserving that bone is critical. When a tooth is lost, the bone underneath begins to shrink without the stimulation it normally receives from a tooth root. Clinicians managing young patients with missing teeth focus on maintaining enough bone volume so that an implant can be placed successfully later. In rare cases, when skeletal growth is confirmed to be complete in an older adolescent and the bone is favorable, an implant may be placed earlier than the typical guideline. But these are exceptions evaluated on a case-by-case basis, not the norm.
Breast Implants: FDA Age Minimums
The FDA sets clear age requirements for breast implants used for cosmetic augmentation. Saline-filled implants are approved for augmentation in women 18 and older. Silicone gel-filled implants have a higher threshold: 22 and older. The difference reflects the FDA’s assessment that silicone implants carry additional considerations, and the agency wanted patients to be older before making that decision for purely cosmetic reasons.
These age limits apply only to elective augmentation. For breast reconstruction after mastectomy, injury, or congenital conditions, both saline and silicone implants are approved for women of any age. The distinction is between choosing implants for appearance and needing them as part of medical treatment.
Why the Age Requirements Differ by Type
Saline implants are filled with sterile saltwater after being inserted, so if a shell ruptures, the body absorbs the saline harmlessly and the deflation is immediately obvious. Silicone gel implants use a thicker filling that holds its shape, which many patients prefer for a more natural feel. However, a silicone rupture can be harder to detect without imaging, and the gel can migrate into surrounding tissue. The FDA’s higher age requirement for silicone reflects the idea that older patients may be better positioned to commit to the long-term monitoring these implants require, including periodic imaging to check for silent ruptures.
Regardless of type, breast implants are not lifetime devices. Most will need to be replaced or removed at some point, and the likelihood of complications increases the longer they’re in place. For an 18- or 22-year-old, that means potentially decades of follow-up and at least one additional surgery down the line.