Are Same-Day Dental Implants Worth It? Five-Year Study Finds More Bone Loss

Same-day dental implants shorten treatment, but a new five-year trial suggests the speed may cost some bone. In a trial of immediate vs. early implant loading, immediate loading showed more buccal bone loss. Implant survival stayed above 97% in both groups.

TL;DR

• Researchers followed 24 patients with 144 implants supporting full-arch upper prostheses.

• Immediate loading produced 1.15 mm of buccal bone loss versus 0.36 mm with early loading.

• Both groups kept implant survival above 97% after five years.

• The small pilot trial supports individualized planning and does not rule out immediate loading.

What Did The New Five-Year Dental Implant Study Find?

The five-year results appeared in the Journal of Oral Rehabilitation on October 2, 2026, and drew wider coverage from October 8. They extend a randomized trial whose earlier outcomes were published in 2021.

All 24 participants had a fully edentulous upper jaw and received six implants each. The trial registration lists 144 Straumann Bone Level Tapered implants with an SLActive surface, placed in healed bone. Twelve patients (72 implants) received a fixed provisional prosthesis right after surgery. The other twelve received their fixed prosthesis about six weeks later.

The researchers tracked patient satisfaction, quality of life, implant stability, and peri-implant health. They also measured marginal bone loss and prosthetic complications over five years:

Only two differences reached statistical significance: buccal bone loss and mechanical complications. The survival figures differ on paper, but the trial could not separate them from chance. Three participants left the study before the five-year visit, so the final data come from 21 patients.

What Is The Difference Between Immediate And Early Implant Loading?

Dental implant loading protocols describe when a restoration is connected to the implants. They say nothing about when the implants themselves go in. Most clinical research, including a systematic review of maxillary full-arch loading, uses these time windows:

In this trial, the immediate group received a fixed provisional on the day of surgery. The early group received its fixed prosthesis at about six weeks. According to the 2021 report, the early group wore no fixed provisional during that healing period.

Placement timing is a separate decision. Immediate placement means putting an implant into a fresh extraction socket. Marketing for same-day dental implants often blends the two ideas, yet a patient can have immediate placement with delayed loading, or the reverse. Every implant in this trial went into healed bone, so the results speak only to immediate loading.

Why Did Immediately Loaded Implants Lose More Bone?

The trial shows a difference in bone loss, but it does not prove what caused it. Several mechanisms are plausible, and more than one may have contributed.

Early osseointegration depends on a stable bone-implant interface. Loading a new implant before bone has formed around it introduces micromotion. Small amounts are tolerated, but excessive movement can disturb healing and drive crestal remodeling. Primary stability determines how much movement occurs, and it depends on bone density, implant design, and drilling technique.

The trial's 2021 report adds a detail worth noticing. Mean insertion torque was about 27 Ncm in the immediate group and 25 Ncm in the early group. Many immediate-loading protocols look for 35 Ncm or more, and some studies exclude implants below that threshold from immediate loading. Soft maxillary bone, a modest torque, and a same-day prosthesis may together have strained the buccal crest.

Prosthetic factors may also play a part. A provisional bridge flexes more than a final framework, and cantilevers or uneven contacts concentrate force.

The buccal plate matters because it is often thin in the maxilla. It supports the soft tissue over the implant, and once it resorbs, recession and exposed threads become more likely.

Does More Bone Loss Mean A Higher Risk Of Implant Failure?

Not necessarily, and this trial shows why survival alone is a blunt measure. Implant researchers track several outcomes, and each answers a different question:

• Implant survival asks whether the implant is still in the mouth

• Implant success adds criteria such as bone loss limits, absence of pain, and healthy soft tissue

• Marginal bone stability measures how much crestal bone remains around the implant over time

• Peri-implant disease covers mucositis and peri-implantitis around the implant

• Prosthesis survival asks whether the bridge itself is still in use

Both groups had high implant survival despite a threefold difference in buccal bone loss. The two numbers measure different things.

The 1.15 mm average also sits within widely used success thresholds. Criteria from Albrektsson and Isidor allow up to 1.5 mm of bone loss in the first year and 0.2 mm per year after. On those terms, both groups remained successful on average.

The difference still deserves attention. Five years is early in an implant's service life, and nobody knows yet whether the trend continues. The trial does not show that more bone loss now predicts failure later.

Were Same-Day Dental Implants More Likely To Develop Complications?

The answer depends on the type of complication. Mechanical complications were significantly more frequent with immediate loading (P = .015). Biological complications showed no significant difference between groups.

Mechanical problems involve the hardware, such as screw loosening, chipped or fractured acrylic, and worn components. Immediately loaded full-arch cases start with a provisional bridge that takes full function while the implants are still integrating. That sequence gives the prosthesis more chances to fail.

Biological complications involve the tissues. The trial recorded five peri-implantitis cases, four of them around immediately loaded implants. That split looks lopsided, but the numbers are too small to rule out chance, and the difference was not statistically significant.

Peri-implant mucositis, the reversible soft-tissue inflammation that can precede peri-implantitis, affected about 55% of implants. It was spread evenly across both groups. That rate is high, yet a private-practice study of full-arch cases found a similar figure of 56.9%. Full-arch bridges are harder for patients to clean.

How Successful Were Immediate And Early Loading After Five Years?

Both protocols performed well by the usual immediate loading implant success rate benchmarks. Implant survival was 98.6% with immediate loading and 97.2% with early loading.

With 72 implants per group, those percentages correspond to roughly one implant lost in the immediate group and two in the early group. Prosthesis survival of 91.67% in the immediate group reflects one lost prosthesis among 12 patients.

A nonsignificant difference does not prove the protocols are equivalent. Failures are uncommon in implant dentistry, so a trial needs hundreds of patients to compare them reliably. With 24 patients, one extra failure in either group would change the picture.

The survival data support a modest claim. Both protocols kept nearly all implants in function for five years in this setting. They cannot rank the protocols on rare events.

Do Patients Prefer Same-Day Dental Implants?

The appeal is easy to understand. A patient arrives with no upper teeth or a failing denture and leaves with fixed teeth the same day. The alternative means weeks with a removable denture over healing implants, or no teeth at all.

The trial's early data captured that difference. In the 2021 report, immediate loading significantly improved oral health-related quality of life and satisfaction during the first months of treatment.

By five years, the picture had evened out. Patient satisfaction remained high in both groups, according to the journal's summary. Once both groups had a fixed bridge, the early group no longer had a disadvantage to report. The benefit of immediate loading is front-loaded, and it centers on the healing period.

Are Same-Day Implants Suitable For Every Patient?

No single loading protocol fits every case, and this trial cannot identify the ideal one for any given patient. Several factors shape the decision:

• Primary stability, measured by insertion torque or resonance frequency analysis

• Bone quality, which is often softer in the posterior maxilla

• Bone volume and the need for grafting or tilted implants

• Occlusal forces from the opposing arch

• Parafunction such as clenching or bruxism

• Systemic health, including diabetes and medications that affect bone

• Smoking and a history of periodontitis

Full-arch maxillary cases differ from single-tooth implants in important ways. Six implants splinted by one bridge share the load, which helps control micromotion. The upper jaw also tends to have softer bone than the lower jaw, which works in the opposite direction.

The trial did not test All-on-4 treatment, and its results should not be applied directly to four-implant designs. Preoperative CBCT imaging and guided implant surgery help clinicians assess bone and plan positions that favor primary stability.

What Does Previous Research Say About Immediate Implant Loading?

Most earlier trials found little difference in bone loss between loading protocols, which makes this result stand out. Direct comparisons are limited, because location, prosthesis type, and timing all vary between studies.

A five-year randomized trial of anterior single-tooth implants followed 62 patients. It found no significant difference in marginal bone loss, at 1.16 mm with immediate loading and 1.20 mm with conventional loading. Those immediate crowns were kept out of occlusal contact, unlike a full-arch bridge used for chewing.

A 2026 randomized trial in BMC Oral Health compared immediate and delayed loading in the anterior maxilla. It reported comparable bone density and implant stability, though it included only 16 patients and six months of follow-up.

For full-arch maxillary cases specifically, a 2021 systematic review found weak evidence of any difference between immediate loading and other protocols. It also found bone loss was not different across protocols. The new trial adds a longer follow-up to that thin evidence base, and it points the other way on buccal bone.

Should Dentists Reconsider Immediate Loading Protocols?

The trial supports refining immediate loading rather than abandoning it. It does not establish that early loading should replace immediate loading for every full-arch case.

Several practical steps follow from the findings. Clinicians can document insertion torque or implant stability for every implant and treat low readings as a reason to delay loading. Careful occlusal design for the provisional also helps, with even contacts, short cantilevers, and a rigid framework.

Long-term monitoring deserves the same attention as the surgery. Baseline radiographs at prosthesis delivery make later bone changes measurable, and regular maintenance visits catch mucositis before it progresses.

The broader point is how outcomes get judged. Two protocols can both keep implants in place while differing in bone stability and repair needs. Our guide to dental implant treatment planning covers how imaging, prosthetic design, and patient factors fit together. Digital workflows with intraoral scanners can also speed provisional fabrication when immediate loading is planned.

What Are The Limitations Of The Five-Year Trial?

The authors called this a pilot trial, and the design limits how far the results reach:

• Only 24 patients were randomized, and three dropped out before five years

• The trial was registered after recruitment and randomization were complete

• Institut Straumann is listed as a collaborator and supplied the implants and components

• All patients received one implant system with one surface

• All implants went into healed maxillary bone in patients eligible for six-implant bridges

The implant count also needs care. The 144 implants do not represent 144 independent observations. Implants in the same mouth share the patient's bone quality, bite force, hygiene, and habits. One heavy clencher can affect six implants at once, so the effective sample sits closer to 24 than 144.

The ClinicalTrials.gov record shows both the late registration and the Straumann collaboration. Late registration matters because it removes a safeguard against changing outcomes after the data come in. Manufacturer support does not invalidate a study, but readers should weigh it.

Bottom Line

In this five-year trial of immediate vs early implant loading, immediate loading showed more buccal marginal bone loss, at 1.15 mm versus 0.36 mm. It also showed more mechanical complications. Both protocols still kept implant survival above 97% in full-arch upper-jaw cases.

The study raises a question about long-term bone stability. It does not show that same-day dental implants are unsafe. With 24 patients, late registration, and manufacturer support, it calls for larger trials before anyone rewrites protocols.

For clinicians and patients, the practical lesson is to judge implant treatment on more than survival. Bone levels, complications, and maintenance needs belong in the conversation too.