Subperiosteal Dental Implants: KLS IPS for Severe Bone Loss

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What a subperiosteal implant is

A conventional dental implant is a titanium post placed into the jawbone, and it needs enough bone to hold it. A subperiosteal implant flips that: a custom titanium framework rests on top of the bone, under the gum, and gets its stability from broad contact with the bone plus screws driven into the densest areas available.

The idea is old — subperiosteal implants existed from the 1940s on — and the old versions earned their bad reputation. They were shaped by hand from impressions, fit was approximate, and long-term results were inconsistent enough that the whole category was largely abandoned once modern implants arrived.

What changed is how they are made. The KLS Martin IPS Implants Preprosthetic system starts from a CT scan of your jaw plus a surface scan, is designed on that data as a single piece, and is then 3D-printed in titanium by laser melting — a framework built for one jaw only, developed at Hannover Medical School's oral and maxillofacial surgery department and first placed in 2015. Instead of a few screws in one direction, the frame is fixed with screws spread across multiple angles into deliberately chosen strong bone, away from the posts that will carry your teeth, so chewing force is distributed rather than concentrated.

Who this is actually for

This is not a replacement for regular implants, and any office that pitches it that way is selling, not planning. The published use cases are narrow and specific: jaws with severe bone loss where there is genuinely not enough volume to stabilize conventional implants, reconstruction after jaw surgery for cancer, craniofacial conditions such as cleft lip and palate where the bone never developed normally, and patients whose health rules out the staged grafting surgeries that rebuilding bone would take.

If you have enough bone, a conventional implant is still the better-studied road. If bone grafting can realistically rebuild your site, that remains the standard answer, and we do it routinely. A subperiosteal frame is for the situation where neither is on the table — and part of our job at the consultation is telling you honestly which situation you are in.

What the survival numbers say

The short and medium-term data is genuinely encouraging. The Hannover group that developed the system has reported on 45 of these implants in 41 patients with no failures across more than five years of use. And a systematic review pooling 227 patients with modern 3D-printed subperiosteal implants — the whole category, not one brand — found 97.8 percent still in function at an average follow-up of about 21 months.

For a technology aimed at jaws where nothing else fits without major grafting, those are strong numbers. But they are short-horizon numbers, and the honest version of this article does not stop there.

The honest long-term picture

A 2025 study following these implants for an average of almost nine years is the most useful thing a prospective patient can read. Survival — is the implant still in place and working — went from 97.5 percent at two years to 89.4 percent over the long term. Success — a stricter measure that also counts complications needing treatment along the way — came in around 54 percent.

Those two numbers are not a contradiction; they are two different questions. The titanium itself held up: the long-term problems were overwhelmingly in the soft tissue, the gum covering the frame, not fractures or loosening of the metal. What that means in practice is that a subperiosteal implant is not a place-it-and-forget-it device. It is a long-term relationship with maintenance.

When you talk to any surgeon about this technology — us included — ask which number they are quoting, survival or success. We would rather show you both and explain the difference than win the consultation with the prettier one.

The main risk: the gum over the frame

The complication that shows up most consistently in the literature is soft-tissue exposure — the gum over part of the frame thins or opens, and a section of titanium shows through. In the pooled review, roughly one patient in four had some degree of partial exposure. An exposure does not automatically mean the implant has failed; the frame usually stays rigid and functional. It does mean monitoring, meticulous hygiene, and sometimes a soft-tissue procedure to re-cover the area.

The design side of the field has converged on what helps: a frame that fits the bone passively instead of being forced into place, polished surfaces where tissue contact happens, screws anchored in the thick buttress bone that resists resorption, and smooth transitions where the posts come through the gum. The patient side is simpler and non-negotiable: maintenance visits on a five-to-six-month rhythm, because the problems that end these cases grow slowly and are treatable when caught early.

How we plan one in Midtown Houston

It starts the same way every implant case starts here: a free consultation with a 3D CBCT scan. That scan answers the first and most important question — whether you actually need this, or whether conventional implants, grafting, or a full-arch solution would serve you better. Most people who come in asking about subperiosteal implants turn out to have simpler options, and we say so.

If a subperiosteal frame is genuinely the right call, the workup steps up: planning-grade CT imaging and a surface scan of your jaw go to the design process, the framework is manufactured for your anatomy, and our oral and maxillofacial surgeons place it in a single planned surgery. Because the frame does not rely on months of bone integration the way grafted sites do, the path to functional teeth is typically shorter than a multi-stage grafting timeline.

Because every frame is designed from scratch for one jaw, there is no list price for this procedure — the fee is quoted in writing at your consultation, after the scan, with every component itemized. That is how we quote everything, and a custom implant is the last place to make an exception.

Subperiosteal, zygomatic, or graft-then-implant?

Severe upper-jaw bone loss usually puts three roads on the table: rebuild the bone with grafting and place conventional implants later, anchor long zygomatic implants in the cheekbone, or sit a custom subperiosteal frame on what remains. There is no published head-to-head trial that crowns one of them, and anyone who tells you otherwise is ahead of the evidence.

The real decision is anatomical and personal: how much bone is left and where, how your health handles staged surgeries, how you feel about the timeline each road takes, and what the long-term maintenance of each looks like for you. This is exactly the kind of decision that benefits from a multi-specialty office — the surgeons who place frames and grafts, the periodontist who manages the soft tissue that decides long-term success, and the restorative dentists who design the final teeth all work in one building here and plan from the same scan.

Severe bone loss consultations in Midtown Houston

If you have been turned down for implants because of bone loss, bring us whatever you have — prior scans, treatment plans, the quote you walked away from. Second opinions on complex implant cases are ordinary here, and the 3D CBCT scan at your consultation is free.

We are at 106 W Gray Street in Midtown, between Downtown and the Texas Medical Center, with parking on site. Open Monday to Friday 9 to 5 and Saturday 9 to 3. Call (713) 322-7474 or book online, and you will leave the consultation knowing which of the three roads fits your jaw — in writing.